/********************************************************************************************** * * rlgl - raylib OpenGL abstraction layer * * rlgl is a wrapper for multiple OpenGL versions (1.1, 2.1, 3.3 Core, ES 2.0) to * pseudo-OpenGL 1.1 style functions (rlVertex, rlTranslate, rlRotate...). * * When chosing an OpenGL version greater than OpenGL 1.1, rlgl stores vertex data on internal * VBO buffers (and VAOs if available). It requires calling 3 functions: * rlglInit() - Initialize internal buffers and auxiliar resources * rlglDraw() - Process internal buffers and send required draw calls * rlglClose() - De-initialize internal buffers data and other auxiliar resources * * CONFIGURATION: * * #define GRAPHICS_API_OPENGL_11 * #define GRAPHICS_API_OPENGL_21 * #define GRAPHICS_API_OPENGL_33 * #define GRAPHICS_API_OPENGL_ES2 * Use selected OpenGL graphics backend, should be supported by platform * Those preprocessor defines are only used on rlgl module, if OpenGL version is * required by any other module, use rlGetVersion() tocheck it * * #define RLGL_IMPLEMENTATION * Generates the implementation of the library into the included file. * If not defined, the library is in header only mode and can be included in other headers * or source files without problems. But only ONE file should hold the implementation. * * #define RLGL_STANDALONE * Use rlgl as standalone library (no raylib dependency) * * #define SUPPORT_VR_SIMULATOR * Support VR simulation functionality (stereo rendering) * * #define SUPPORT_DISTORTION_SHADER * Include stereo rendering distortion shader (embedded) * * DEPENDENCIES: * raymath - 3D math functionality (Vector3, Matrix, Quaternion) * GLAD - OpenGL extensions loading (OpenGL 3.3 Core only) * * * LICENSE: zlib/libpng * * Copyright (c) 2014-2018 Ramon Santamaria (@raysan5) * * This software is provided "as-is", without any express or implied warranty. In no event * will the authors be held liable for any damages arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, including commercial * applications, and to alter it and redistribute it freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not claim that you * wrote the original software. If you use this software in a product, an acknowledgment * in the product documentation would be appreciated but is not required. * * 2. Altered source versions must be plainly marked as such, and must not be misrepresented * as being the original software. * * 3. This notice may not be removed or altered from any source distribution. * **********************************************************************************************/ #ifndef RLGL_H #define RLGL_H #if defined(RLGL_STANDALONE) #define RAYMATH_STANDALONE #define RAYMATH_HEADER_ONLY #else #include "raylib.h" // Required for: Model, Shader, Texture2D, TraceLog() #endif #include "raymath.h" // Required for: Vector3, Matrix // Security check in case no GRAPHICS_API_OPENGL_* defined #if !defined(GRAPHICS_API_OPENGL_11) && \ !defined(GRAPHICS_API_OPENGL_21) && \ !defined(GRAPHICS_API_OPENGL_33) && \ !defined(GRAPHICS_API_OPENGL_ES2) #define GRAPHICS_API_OPENGL_33 #endif // Security check in case multiple GRAPHICS_API_OPENGL_* defined #if defined(GRAPHICS_API_OPENGL_11) #if defined(GRAPHICS_API_OPENGL_21) #undef GRAPHICS_API_OPENGL_21 #endif #if defined(GRAPHICS_API_OPENGL_33) #undef GRAPHICS_API_OPENGL_33 #endif #if defined(GRAPHICS_API_OPENGL_ES2) #undef GRAPHICS_API_OPENGL_ES2 #endif #endif #if defined(GRAPHICS_API_OPENGL_21) #define GRAPHICS_API_OPENGL_33 #endif //---------------------------------------------------------------------------------- // Defines and Macros //---------------------------------------------------------------------------------- #if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33) // This is the maximum amount of elements (quads) per batch // NOTE: Be careful with text, every letter maps to a quad #define MAX_BATCH_ELEMENTS 8192 #elif defined(GRAPHICS_API_OPENGL_ES2) // We reduce memory sizes for embedded systems (RPI and HTML5) // NOTE: On HTML5 (emscripten) this is allocated on heap, by default it's only 16MB!...just take care... #define MAX_BATCH_ELEMENTS 2048 #endif #define MAX_BATCH_BUFFERING 1 // Max number of buffers for batching (multi-buffering) #define MAX_MATRIX_STACK_SIZE 32 // Max size of Matrix stack #define MAX_DRAWCALL_REGISTERED 256 // Max draws by state changes (mode, texture) // Texture parameters (equivalent to OpenGL defines) #define RL_TEXTURE_WRAP_S 0x2802 // GL_TEXTURE_WRAP_S #define RL_TEXTURE_WRAP_T 0x2803 // GL_TEXTURE_WRAP_T #define RL_TEXTURE_MAG_FILTER 0x2800 // GL_TEXTURE_MAG_FILTER #define RL_TEXTURE_MIN_FILTER 0x2801 // GL_TEXTURE_MIN_FILTER #define RL_TEXTURE_ANISOTROPIC_FILTER 0x3000 // Anisotropic filter (custom identifier) #define RL_FILTER_NEAREST 0x2600 // GL_NEAREST #define RL_FILTER_LINEAR 0x2601 // GL_LINEAR #define RL_FILTER_MIP_NEAREST 0x2700 // GL_NEAREST_MIPMAP_NEAREST #define RL_FILTER_NEAREST_MIP_LINEAR 0x2702 // GL_NEAREST_MIPMAP_LINEAR #define RL_FILTER_LINEAR_MIP_NEAREST 0x2701 // GL_LINEAR_MIPMAP_NEAREST #define RL_FILTER_MIP_LINEAR 0x2703 // GL_LINEAR_MIPMAP_LINEAR #define RL_WRAP_REPEAT 0x2901 // GL_REPEAT #define RL_WRAP_CLAMP 0x812F // GL_CLAMP_TO_EDGE #define RL_WRAP_MIRROR_REPEAT 0x8370 // GL_MIRRORED_REPEAT #define RL_WRAP_MIRROR_CLAMP 0x8742 // GL_MIRROR_CLAMP_EXT // Matrix modes (equivalent to OpenGL) #define RL_MODELVIEW 0x1700 // GL_MODELVIEW #define RL_PROJECTION 0x1701 // GL_PROJECTION #define RL_TEXTURE 0x1702 // GL_TEXTURE // Primitive assembly draw modes #define RL_LINES 0x0001 // GL_LINES #define RL_TRIANGLES 0x0004 // GL_TRIANGLES #define RL_QUADS 0x0007 // GL_QUADS //---------------------------------------------------------------------------------- // Types and Structures Definition //---------------------------------------------------------------------------------- typedef enum { OPENGL_11 = 1, OPENGL_21, OPENGL_33, OPENGL_ES_20 } GlVersion; typedef unsigned char byte; #if defined(RLGL_STANDALONE) #ifndef __cplusplus // Boolean type typedef enum { false, true } bool; #endif // Color type, RGBA (32bit) typedef struct Color { unsigned char r; unsigned char g; unsigned char b; unsigned char a; } Color; // Texture2D type // NOTE: Data stored in GPU memory typedef struct Texture2D { unsigned int id; // OpenGL texture id int width; // Texture base width int height; // Texture base height int mipmaps; // Mipmap levels, 1 by default int format; // Data format (PixelFormat) } Texture2D; // RenderTexture2D type, for texture rendering typedef struct RenderTexture2D { unsigned int id; // Render texture (fbo) id Texture2D texture; // Color buffer attachment texture Texture2D depth; // Depth buffer attachment texture } RenderTexture2D; // Vertex data definning a mesh typedef struct Mesh { int vertexCount; // number of vertices stored in arrays int triangleCount; // number of triangles stored (indexed or not) float *vertices; // vertex position (XYZ - 3 components per vertex) (shader-location = 0) float *texcoords; // vertex texture coordinates (UV - 2 components per vertex) (shader-location = 1) float *texcoords2; // vertex second texture coordinates (useful for lightmaps) (shader-location = 5) float *normals; // vertex normals (XYZ - 3 components per vertex) (shader-location = 2) float *tangents; // vertex tangents (XYZW - 4 components per vertex) (shader-location = 4) unsigned char *colors; // vertex colors (RGBA - 4 components per vertex) (shader-location = 3) unsigned short *indices;// vertex indices (in case vertex data comes indexed) // Animation vertex data float *baseVertices; // Vertex base position (required to apply bones transformations) float *baseNormals; // Vertex base normals (required to apply bones transformations) float *weightBias; // Vertex weight bias int *weightId; // Vertex weight id // OpenGL identifiers unsigned int vaoId; // OpenGL Vertex Array Object id unsigned int vboId[7]; // OpenGL Vertex Buffer Objects id (7 types of vertex data) } Mesh; // Shader and material limits #define MAX_SHADER_LOCATIONS 32 #define MAX_MATERIAL_MAPS 12 // Shader type (generic) typedef struct Shader { unsigned int id; // Shader program id int locs[MAX_SHADER_LOCATIONS]; // Shader locations array } Shader; // Material texture map typedef struct MaterialMap { Texture2D texture; // Material map texture Color color; // Material map color float value; // Material map value } MaterialMap; // Material type (generic) typedef struct Material { Shader shader; // Material shader MaterialMap maps[MAX_MATERIAL_MAPS]; // Material maps float *params; // Material generic parameters (if required) } Material; // Camera type, defines a camera position/orientation in 3d space typedef struct Camera { Vector3 position; // Camera position Vector3 target; // Camera target it looks-at Vector3 up; // Camera up vector (rotation over its axis) float fovy; // Camera field-of-view apperture in Y (degrees) } Camera; // Head-Mounted-Display device parameters typedef struct VrDeviceInfo { int hResolution; // HMD horizontal resolution in pixels int vResolution; // HMD vertical resolution in pixels float hScreenSize; // HMD horizontal size in meters float vScreenSize; // HMD vertical size in meters float vScreenCenter; // HMD screen center in meters float eyeToScreenDistance; // HMD distance between eye and display in meters float lensSeparationDistance; // HMD lens separation distance in meters float interpupillaryDistance; // HMD IPD (distance between pupils) in meters float lensDistortionValues[4]; // HMD lens distortion constant parameters float chromaAbCorrection[4]; // HMD chromatic aberration correction parameters } VrDeviceInfo; // TraceLog message types typedef enum { LOG_ALL, LOG_TRACE, LOG_DEBUG, LOG_INFO, LOG_WARN, LOG_ERROR, LOG_FATAL, LOG_NONE } TraceLogType; // Texture formats (support depends on OpenGL version) typedef enum { UNCOMPRESSED_GRAYSCALE = 1, // 8 bit per pixel (no alpha) UNCOMPRESSED_GRAY_ALPHA, UNCOMPRESSED_R5G6B5, // 16 bpp UNCOMPRESSED_R8G8B8, // 24 bpp UNCOMPRESSED_R5G5B5A1, // 16 bpp (1 bit alpha) UNCOMPRESSED_R4G4B4A4, // 16 bpp (4 bit alpha) UNCOMPRESSED_R8G8B8A8, // 32 bpp UNCOMPRESSED_R32, // 32 bpp (1 channel - float) UNCOMPRESSED_R32G32B32, // 32*3 bpp (3 channels - float) UNCOMPRESSED_R32G32B32A32, // 32*4 bpp (4 channels - float) COMPRESSED_DXT1_RGB, // 4 bpp (no alpha) COMPRESSED_DXT1_RGBA, // 4 bpp (1 bit alpha) COMPRESSED_DXT3_RGBA, // 8 bpp COMPRESSED_DXT5_RGBA, // 8 bpp COMPRESSED_ETC1_RGB, // 4 bpp COMPRESSED_ETC2_RGB, // 4 bpp COMPRESSED_ETC2_EAC_RGBA, // 8 bpp COMPRESSED_PVRT_RGB, // 4 bpp COMPRESSED_PVRT_RGBA, // 4 bpp COMPRESSED_ASTC_4x4_RGBA, // 8 bpp COMPRESSED_ASTC_8x8_RGBA // 2 bpp } PixelFormat; // Texture parameters: filter mode // NOTE 1: Filtering considers mipmaps if available in the texture // NOTE 2: Filter is accordingly set for minification and magnification typedef enum { FILTER_POINT = 0, // No filter, just pixel aproximation FILTER_BILINEAR, // Linear filtering FILTER_TRILINEAR, // Trilinear filtering (linear with mipmaps) FILTER_ANISOTROPIC_4X, // Anisotropic filtering 4x FILTER_ANISOTROPIC_8X, // Anisotropic filtering 8x FILTER_ANISOTROPIC_16X, // Anisotropic filtering 16x } TextureFilterMode; // Color blending modes (pre-defined) typedef enum { BLEND_ALPHA = 0, BLEND_ADDITIVE, BLEND_MULTIPLIED } BlendMode; // Shader location point type typedef enum { LOC_VERTEX_POSITION = 0, LOC_VERTEX_TEXCOORD01, LOC_VERTEX_TEXCOORD02, LOC_VERTEX_NORMAL, LOC_VERTEX_TANGENT, LOC_VERTEX_COLOR, LOC_MATRIX_MVP, LOC_MATRIX_MODEL, LOC_MATRIX_VIEW, LOC_MATRIX_PROJECTION, LOC_VECTOR_VIEW, LOC_COLOR_DIFFUSE, LOC_COLOR_SPECULAR, LOC_COLOR_AMBIENT, LOC_MAP_ALBEDO, // LOC_MAP_DIFFUSE LOC_MAP_METALNESS, // LOC_MAP_SPECULAR LOC_MAP_NORMAL, LOC_MAP_ROUGHNESS, LOC_MAP_OCCLUSION, LOC_MAP_EMISSION, LOC_MAP_HEIGHT, LOC_MAP_CUBEMAP, LOC_MAP_IRRADIANCE, LOC_MAP_PREFILTER, LOC_MAP_BRDF } ShaderLocationIndex; // Shader uniform data types typedef enum { UNIFORM_FLOAT = 0, UNIFORM_VEC2, UNIFORM_VEC3, UNIFORM_VEC4, UNIFORM_INT, UNIFORM_IVEC2, UNIFORM_IVEC3, UNIFORM_IVEC4, UNIFORM_SAMPLER2D } ShaderUniformDataType; #define LOC_MAP_DIFFUSE LOC_MAP_ALBEDO #define LOC_MAP_SPECULAR LOC_MAP_METALNESS // Material map type typedef enum { MAP_ALBEDO = 0, // MAP_DIFFUSE MAP_METALNESS = 1, // MAP_SPECULAR MAP_NORMAL = 2, MAP_ROUGHNESS = 3, MAP_OCCLUSION, MAP_EMISSION, MAP_HEIGHT, MAP_CUBEMAP, // NOTE: Uses GL_TEXTURE_CUBE_MAP MAP_IRRADIANCE, // NOTE: Uses GL_TEXTURE_CUBE_MAP MAP_PREFILTER, // NOTE: Uses GL_TEXTURE_CUBE_MAP MAP_BRDF } TexmapIndex; #define MAP_DIFFUSE MAP_ALBEDO #define MAP_SPECULAR MAP_METALNESS // VR Head Mounted Display devices typedef enum { HMD_DEFAULT_DEVICE = 0, HMD_OCULUS_RIFT_DK2, HMD_OCULUS_RIFT_CV1, HMD_OCULUS_GO, HMD_VALVE_HTC_VIVE, HMD_SONY_PSVR } VrDevice; #endif #if defined(__cplusplus) extern "C" { // Prevents name mangling of functions #endif //------------------------------------------------------------------------------------ // Functions Declaration - Matrix operations //------------------------------------------------------------------------------------ void rlMatrixMode(int mode); // Choose the current matrix to be transformed void rlPushMatrix(void); // Push the current matrix to stack void rlPopMatrix(void); // Pop lattest inserted matrix from stack void rlLoadIdentity(void); // Reset current matrix to identity matrix void rlTranslatef(float x, float y, float z); // Multiply the current matrix by a translation matrix void rlRotatef(float angleDeg, float x, float y, float z); // Multiply the current matrix by a rotation matrix void rlScalef(float x, float y, float z); // Multiply the current matrix by a scaling matrix void rlMultMatrixf(float *matf); // Multiply the current matrix by another matrix void rlFrustum(double left, double right, double bottom, double top, double near, double far); void rlOrtho(double left, double right, double bottom, double top, double near, double far); void rlViewport(int x, int y, int width, int height); // Set the viewport area //------------------------------------------------------------------------------------ // Functions Declaration - Vertex level operations //------------------------------------------------------------------------------------ void rlBegin(int mode); // Initialize drawing mode (how to organize vertex) void rlEnd(void); // Finish vertex providing void rlVertex2i(int x, int y); // Define one vertex (position) - 2 int void rlVertex2f(float x, float y); // Define one vertex (position) - 2 float void rlVertex3f(float x, float y, float z); // Define one vertex (position) - 3 float void rlTexCoord2f(float x, float y); // Define one vertex (texture coordinate) - 2 float void rlNormal3f(float x, float y, float z); // Define one vertex (normal) - 3 float void rlColor4ub(byte r, byte g, byte b, byte a); // Define one vertex (color) - 4 byte void rlColor3f(float x, float y, float z); // Define one vertex (color) - 3 float void rlColor4f(float x, float y, float z, float w); // Define one vertex (color) - 4 float //------------------------------------------------------------------------------------ // Functions Declaration - OpenGL equivalent functions (common to 1.1, 3.3+, ES2) // NOTE: This functions are used to completely abstract raylib code from OpenGL layer //------------------------------------------------------------------------------------ void rlEnableTexture(unsigned int id); // Enable texture usage void rlDisableTexture(void); // Disable texture usage void rlTextureParameters(unsigned int id, int param, int value); // Set texture parameters (filter, wrap) void rlEnableRenderTexture(unsigned int id); // Enable render texture (fbo) void rlDisableRenderTexture(void); // Disable render texture (fbo), return to default framebuffer void rlEnableDepthTest(void); // Enable depth test void rlDisableDepthTest(void); // Disable depth test void rlEnableWireMode(void); // Enable wire mode void rlDisableWireMode(void); // Disable wire mode void rlDeleteTextures(unsigned int id); // Delete OpenGL texture from GPU void rlDeleteRenderTextures(RenderTexture2D target); // Delete render textures (fbo) from GPU void rlDeleteShader(unsigned int id); // Delete OpenGL shader program from GPU void rlDeleteVertexArrays(unsigned int id); // Unload vertex data (VAO) from GPU memory void rlDeleteBuffers(unsigned int id); // Unload vertex data (VBO) from GPU memory void rlClearColor(byte r, byte g, byte b, byte a); // Clear color buffer with color void rlClearScreenBuffers(void); // Clear used screen buffers (color and depth) //------------------------------------------------------------------------------------ // Functions Declaration - rlgl functionality //------------------------------------------------------------------------------------ void rlglInit(int width, int height); // Initialize rlgl (buffers, shaders, textures, states) void rlglClose(void); // De-inititialize rlgl (buffers, shaders, textures) void rlglDraw(void); // Update and draw default internal buffers int rlGetVersion(void); // Returns current OpenGL version bool rlCheckBufferLimit(int vCount); // Check internal buffer overflow for a given number of vertex void rlSetDebugMarker(const char *text); // Set debug marker for analysis void rlLoadExtensions(void *loader); // Load OpenGL extensions Vector3 rlUnproject(Vector3 source, Matrix proj, Matrix view); // Get world coordinates from screen coordinates // Textures data management unsigned int rlLoadTexture(void *data, int width, int height, int format, int mipmapCount); // Load texture in GPU void rlUpdateTexture(unsigned int id, int width, int height, int format, const void *data); // Update GPU texture with new data void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned int *glFormat, unsigned int *glType); // Get OpenGL internal formats void rlUnloadTexture(unsigned int id); // Unload texture from GPU memory void rlGenerateMipmaps(Texture2D *texture); // Generate mipmap data for selected texture void *rlReadTexturePixels(Texture2D texture); // Read texture pixel data unsigned char *rlReadScreenPixels(int width, int height); // Read screen pixel data (color buffer) RenderTexture2D rlLoadRenderTexture(int width, int height); // Load a texture to be used for rendering (fbo with color and depth attachments) // Vertex data management void rlLoadMesh(Mesh *mesh, bool dynamic); // Upload vertex data into GPU and provided VAO/VBO ids void rlUpdateMesh(Mesh mesh, int buffer, int numVertex); // Update vertex data on GPU (upload new data to one buffer) void rlDrawMesh(Mesh mesh, Material material, Matrix transform); // Draw a 3d mesh with material and transform void rlUnloadMesh(Mesh *mesh); // Unload mesh data from CPU and GPU // NOTE: There is a set of shader related functions that are available to end user, // to avoid creating function wrappers through core module, they have been directly declared in raylib.h #if defined(RLGL_STANDALONE) //------------------------------------------------------------------------------------ // Shaders System Functions (Module: rlgl) // NOTE: This functions are useless when using OpenGL 1.1 //------------------------------------------------------------------------------------ // Shader loading/unloading functions char *LoadText(const char *fileName); // Load chars array from text file Shader LoadShader(const char *vsFileName, const char *fsFileName); // Load shader from files and bind default locations Shader LoadShaderCode(char *vsCode, char *fsCode); // Load shader from code strings and bind default locations void UnloadShader(Shader shader); // Unload shader from GPU memory (VRAM) Shader GetShaderDefault(void); // Get default shader Texture2D GetTextureDefault(void); // Get default texture // Shader configuration functions int GetShaderLocation(Shader shader, const char *uniformName); // Get shader uniform location void SetShaderValue(Shader shader, int uniformLoc, const void *value, int uniformType); // Set shader uniform value void SetShaderValueV(Shader shader, int uniformLoc, const void *value, int uniformType, int count); // Set shader uniform value vector void SetShaderValueMatrix(Shader shader, int uniformLoc, Matrix mat); // Set shader uniform value (matrix 4x4) void SetMatrixProjection(Matrix proj); // Set a custom projection matrix (replaces internal projection matrix) void SetMatrixModelview(Matrix view); // Set a custom modelview matrix (replaces internal modelview matrix) Matrix GetMatrixModelview(); // Get internal modelview matrix // Texture maps generation (PBR) // NOTE: Required shaders should be provided Texture2D GenTextureCubemap(Shader shader, Texture2D skyHDR, int size); // Generate cubemap texture from HDR texture Texture2D GenTextureIrradiance(Shader shader, Texture2D cubemap, int size); // Generate irradiance texture using cubemap data Texture2D GenTexturePrefilter(Shader shader, Texture2D cubemap, int size); // Generate prefilter texture using cubemap data Texture2D GenTextureBRDF(Shader shader, int size); // Generate BRDF texture using cubemap data // Shading begin/end functions void BeginShaderMode(Shader shader); // Begin custom shader drawing void EndShaderMode(void); // End custom shader drawing (use default shader) void BeginBlendMode(int mode); // Begin blending mode (alpha, additive, multiplied) void EndBlendMode(void); // End blending mode (reset to default: alpha blending) // VR control functions VrDeviceInfo GetVrDeviceInfo(int vrDeviceType); // Get VR device information for some standard devices void InitVrSimulator(VrDeviceInfo info); // Init VR simulator for selected device parameters void CloseVrSimulator(void); // Close VR simulator for current device bool IsVrSimulatorReady(void); // Detect if VR simulator is ready void SetVrDistortionShader(Shader shader); // Set VR distortion shader for stereoscopic rendering void UpdateVrTracking(Camera *camera); // Update VR tracking (position and orientation) and camera void ToggleVrMode(void); // Enable/Disable VR experience void BeginVrDrawing(void); // Begin VR simulator stereo rendering void EndVrDrawing(void); // End VR simulator stereo rendering void TraceLog(int msgType, const char *text, ...); // Show trace log messages (LOG_INFO, LOG_WARNING, LOG_ERROR, LOG_DEBUG) int GetPixelDataSize(int width, int height, int format);// Get pixel data size in bytes (image or texture) #endif #if defined(__cplusplus) } #endif #endif // RLGL_H /*********************************************************************************** * * RLGL IMPLEMENTATION * ************************************************************************************/ #if defined(RLGL_IMPLEMENTATION) #if defined(RLGL_STANDALONE) #define SUPPORT_VR_SIMULATOR #define SUPPORT_DISTORTION_SHADER #else #include "config.h" // rlgl module configuration #endif #include // Required for: fopen(), fclose(), fread()... [Used only on LoadText()] #include // Required for: malloc(), free(), rand() #include // Required for: strcmp(), strlen(), strtok() [Used only in extensions loading] #include // Required for: atan2() #if !defined(RLGL_STANDALONE) #include "raymath.h" // Required for: Vector3 and Matrix functions #endif #if defined(GRAPHICS_API_OPENGL_11) #if defined(__APPLE__) #include // OpenGL 1.1 library for OSX #include #else // APIENTRY for OpenGL function pointer declarations is required #ifndef APIENTRY #if defined(_WIN32) #define APIENTRY __stdcall #else #define APIENTRY #endif #endif // WINGDIAPI definition. Some Windows OpenGL headers need it #if !defined(WINGDIAPI) && defined(_WIN32) #define WINGDIAPI __declspec(dllimport) #endif #include // OpenGL 1.1 library #endif #endif #if defined(GRAPHICS_API_OPENGL_21) #define GRAPHICS_API_OPENGL_33 // OpenGL 2.1 uses mostly OpenGL 3.3 Core functionality #endif #if defined(GRAPHICS_API_OPENGL_33) #if defined(__APPLE__) #include // OpenGL 3 library for OSX #include // OpenGL 3 extensions library for OSX #else #define GLAD_IMPLEMENTATION #if defined(RLGL_STANDALONE) #include "glad.h" // GLAD extensions loading library, includes OpenGL headers #else #include "external/glad.h" // GLAD extensions loading library, includes OpenGL headers #endif #endif #endif #if defined(GRAPHICS_API_OPENGL_ES2) #include // EGL library #include // OpenGL ES 2.0 library #include // OpenGL ES 2.0 extensions library #endif #if defined(RLGL_STANDALONE) #include // Required for: va_list, va_start(), vfprintf(), va_end() [Used only on TraceLog()] #endif //---------------------------------------------------------------------------------- // Defines and Macros //---------------------------------------------------------------------------------- #ifndef GL_SHADING_LANGUAGE_VERSION #define GL_SHADING_LANGUAGE_VERSION 0x8B8C #endif #ifndef GL_COMPRESSED_RGB_S3TC_DXT1_EXT #define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0 #endif #ifndef GL_COMPRESSED_RGBA_S3TC_DXT1_EXT #define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1 #endif #ifndef GL_COMPRESSED_RGBA_S3TC_DXT3_EXT #define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2 #endif #ifndef GL_COMPRESSED_RGBA_S3TC_DXT5_EXT #define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3 #endif #ifndef GL_ETC1_RGB8_OES #define GL_ETC1_RGB8_OES 0x8D64 #endif #ifndef GL_COMPRESSED_RGB8_ETC2 #define GL_COMPRESSED_RGB8_ETC2 0x9274 #endif #ifndef GL_COMPRESSED_RGBA8_ETC2_EAC #define GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278 #endif #ifndef GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG #define GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG 0x8C00 #endif #ifndef GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG #define GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG 0x8C02 #endif #ifndef GL_COMPRESSED_RGBA_ASTC_4x4_KHR #define GL_COMPRESSED_RGBA_ASTC_4x4_KHR 0x93b0 #endif #ifndef GL_COMPRESSED_RGBA_ASTC_8x8_KHR #define GL_COMPRESSED_RGBA_ASTC_8x8_KHR 0x93b7 #endif #ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT #define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF #endif #ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT #define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE #endif #if defined(GRAPHICS_API_OPENGL_11) #define GL_UNSIGNED_SHORT_5_6_5 0x8363 #define GL_UNSIGNED_SHORT_5_5_5_1 0x8034 #define GL_UNSIGNED_SHORT_4_4_4_4 0x8033 #endif #if defined(GRAPHICS_API_OPENGL_21) #define GL_LUMINANCE 0x1909 #define GL_LUMINANCE_ALPHA 0x190A #endif #if defined(GRAPHICS_API_OPENGL_ES2) #define glClearDepth glClearDepthf #define GL_READ_FRAMEBUFFER GL_FRAMEBUFFER #define GL_DRAW_FRAMEBUFFER GL_FRAMEBUFFER #endif // Default vertex attribute names on shader to set location points #define DEFAULT_ATTRIB_POSITION_NAME "vertexPosition" // shader-location = 0 #define DEFAULT_ATTRIB_TEXCOORD_NAME "vertexTexCoord" // shader-location = 1 #define DEFAULT_ATTRIB_NORMAL_NAME "vertexNormal" // shader-location = 2 #define DEFAULT_ATTRIB_COLOR_NAME "vertexColor" // shader-location = 3 #define DEFAULT_ATTRIB_TANGENT_NAME "vertexTangent" // shader-location = 4 #define DEFAULT_ATTRIB_TEXCOORD2_NAME "vertexTexCoord2" // shader-location = 5 //---------------------------------------------------------------------------------- // Types and Structures Definition //---------------------------------------------------------------------------------- // Dynamic vertex buffers (position + texcoords + colors + indices arrays) typedef struct DynamicBuffer { int vCounter; // vertex position counter to process (and draw) from full buffer int tcCounter; // vertex texcoord counter to process (and draw) from full buffer int cCounter; // vertex color counter to process (and draw) from full buffer float *vertices; // vertex position (XYZ - 3 components per vertex) (shader-location = 0) float *texcoords; // vertex texture coordinates (UV - 2 components per vertex) (shader-location = 1) unsigned char *colors; // vertex colors (RGBA - 4 components per vertex) (shader-location = 3) #if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33) unsigned int *indices; // vertex indices (in case vertex data comes indexed) (6 indices per quad) #elif defined(GRAPHICS_API_OPENGL_ES2) unsigned short *indices; // vertex indices (in case vertex data comes indexed) (6 indices per quad) // NOTE: 6*2 byte = 12 byte, not alignment problem! #endif unsigned int vaoId; // OpenGL Vertex Array Object id unsigned int vboId[4]; // OpenGL Vertex Buffer Objects id (4 types of vertex data) } DynamicBuffer; // Draw call type typedef struct DrawCall { int mode; // Drawing mode: LINES, TRIANGLES, QUADS int vertexCount; // Number of vertex of the draw //GLuint vaoId; // Vertex Array id to be used on the draw //GLuint shaderId; // Shader id to be used on the draw GLuint textureId; // Texture id to be used on the draw //Matrix projection; // Projection matrix for this draw //Matrix modelview; // Modelview matrix for this draw } DrawCall; #if defined(SUPPORT_VR_SIMULATOR) // VR Stereo rendering configuration for simulator typedef struct VrStereoConfig { RenderTexture2D stereoFbo; // VR stereo rendering framebuffer Shader distortionShader; // VR stereo rendering distortion shader Matrix eyesProjection[2]; // VR stereo rendering eyes projection matrices Matrix eyesViewOffset[2]; // VR stereo rendering eyes view offset matrices int eyesViewport[2][4]; // VR stereo rendering eyes viewports [x, y, w, h] } VrStereoConfig; #endif //---------------------------------------------------------------------------------- // Global Variables Definition //---------------------------------------------------------------------------------- #if !defined(GRAPHICS_API_OPENGL_11) && defined(SUPPORT_DISTORTION_SHADER) // Distortion shader embedded static char distortionFShaderStr[] = #if defined(GRAPHICS_API_OPENGL_21) "#version 120 \n" #elif defined(GRAPHICS_API_OPENGL_ES2) "#version 100 \n" "precision mediump float; \n" // precision required for OpenGL ES2 (WebGL) #endif #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) "varying vec2 fragTexCoord; \n" "varying vec4 fragColor; \n" #elif defined(GRAPHICS_API_OPENGL_33) "#version 330 \n" "in vec2 fragTexCoord; \n" "in vec4 fragColor; \n" "out vec4 finalColor; \n" #endif "uniform sampler2D texture0; \n" #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) "uniform vec2 leftLensCenter; \n" "uniform vec2 rightLensCenter; \n" "uniform vec2 leftScreenCenter; \n" "uniform vec2 rightScreenCenter; \n" "uniform vec2 scale; \n" "uniform vec2 scaleIn; \n" "uniform vec4 hmdWarpParam; \n" "uniform vec4 chromaAbParam; \n" #elif defined(GRAPHICS_API_OPENGL_33) "uniform vec2 leftLensCenter = vec2(0.288, 0.5); \n" "uniform vec2 rightLensCenter = vec2(0.712, 0.5); \n" "uniform vec2 leftScreenCenter = vec2(0.25, 0.5); \n" "uniform vec2 rightScreenCenter = vec2(0.75, 0.5); \n" "uniform vec2 scale = vec2(0.25, 0.45); \n" "uniform vec2 scaleIn = vec2(4, 2.2222); \n" "uniform vec4 hmdWarpParam = vec4(1, 0.22, 0.24, 0); \n" "uniform vec4 chromaAbParam = vec4(0.996, -0.004, 1.014, 0.0); \n" #endif "void main() \n" "{ \n" " vec2 lensCenter = fragTexCoord.x < 0.5 ? leftLensCenter : rightLensCenter; \n" " vec2 screenCenter = fragTexCoord.x < 0.5 ? leftScreenCenter : rightScreenCenter; \n" " vec2 theta = (fragTexCoord - lensCenter)*scaleIn; \n" " float rSq = theta.x*theta.x + theta.y*theta.y; \n" " vec2 theta1 = theta*(hmdWarpParam.x + hmdWarpParam.y*rSq + hmdWarpParam.z*rSq*rSq + hmdWarpParam.w*rSq*rSq*rSq); \n" " vec2 thetaBlue = theta1*(chromaAbParam.z + chromaAbParam.w*rSq); \n" " vec2 tcBlue = lensCenter + scale*thetaBlue; \n" " if (any(bvec2(clamp(tcBlue, screenCenter - vec2(0.25, 0.5), screenCenter + vec2(0.25, 0.5)) - tcBlue))) \n" " { \n" #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) " gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0); \n" #elif defined(GRAPHICS_API_OPENGL_33) " finalColor = vec4(0.0, 0.0, 0.0, 1.0); \n" #endif " } \n" " else \n" " { \n" #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) " float blue = texture2D(texture0, tcBlue).b; \n" " vec2 tcGreen = lensCenter + scale*theta1; \n" " float green = texture2D(texture0, tcGreen).g; \n" #elif defined(GRAPHICS_API_OPENGL_33) " float blue = texture(texture0, tcBlue).b; \n" " vec2 tcGreen = lensCenter + scale*theta1; \n" " float green = texture(texture0, tcGreen).g; \n" #endif " vec2 thetaRed = theta1*(chromaAbParam.x + chromaAbParam.y*rSq); \n" " vec2 tcRed = lensCenter + scale*thetaRed; \n" #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) " float red = texture2D(texture0, tcRed).r; \n" " gl_FragColor = vec4(red, green, blue, 1.0); \n" #elif defined(GRAPHICS_API_OPENGL_33) " float red = texture(texture0, tcRed).r; \n" " finalColor = vec4(red, green, blue, 1.0); \n" #endif " } \n" "} \n"; #endif #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) static Matrix stack[MAX_MATRIX_STACK_SIZE] = { 0 }; static int stackCounter = 0; static Matrix modelview = { 0 }; static Matrix projection = { 0 }; static Matrix *currentMatrix = NULL; static int currentMatrixMode = -1; static float currentDepth = -1.0f; // Default dynamic buffer for elements data // NOTE: A multi-buffering system is supported static DynamicBuffer vertexData[MAX_BATCH_BUFFERING] = { 0 }; static int currentBuffer = 0; // Transform matrix to be used with rlTranslate, rlRotate, rlScale static Matrix transformMatrix = { 0 }; static bool useTransformMatrix = false; // Default buffers draw calls static DrawCall *draws = NULL; static int drawsCounter = 0; // Default texture (1px white) useful for plain color polys (required by shader) static unsigned int defaultTextureId; // Default shaders static unsigned int defaultVShaderId; // Default vertex shader id (used by default shader program) static unsigned int defaultFShaderId; // Default fragment shader Id (used by default shader program) static Shader defaultShader; // Basic shader, support vertex color and diffuse texture static Shader currentShader; // Shader to be used on rendering (by default, defaultShader) // Extension supported flag: VAO static bool vaoSupported = false; // VAO support (OpenGL ES2 could not support VAO extension) // Extension supported flag: Compressed textures static bool texCompDXTSupported = false; // DDS texture compression support static bool texCompETC1Supported = false; // ETC1 texture compression support static bool texCompETC2Supported = false; // ETC2/EAC texture compression support static bool texCompPVRTSupported = false; // PVR texture compression support static bool texCompASTCSupported = false; // ASTC texture compression support // Extension supported flag: Textures format static bool texNPOTSupported = false; // NPOT textures full support static bool texFloatSupported = false; // float textures support (32 bit per channel) // Extension supported flag: Clamp mirror wrap mode static bool texMirrorClampSupported = false; // Clamp mirror wrap mode supported // Extension supported flag: Anisotropic filtering static bool texAnisotropicFilterSupported = false; // Anisotropic texture filtering support static float maxAnisotropicLevel = 0.0f; // Maximum anisotropy level supported (minimum is 2.0f) static bool debugMarkerSupported = false; // Debug marker support #if defined(GRAPHICS_API_OPENGL_ES2) // NOTE: VAO functionality is exposed through extensions (OES) static PFNGLGENVERTEXARRAYSOESPROC glGenVertexArrays; static PFNGLBINDVERTEXARRAYOESPROC glBindVertexArray; static PFNGLDELETEVERTEXARRAYSOESPROC glDeleteVertexArrays; //static PFNGLISVERTEXARRAYOESPROC glIsVertexArray; // NOTE: Fails in WebGL, omitted #endif #if defined(SUPPORT_VR_SIMULATOR) // VR global variables static VrStereoConfig vrConfig = { 0 }; // VR stereo configuration for simulator static bool vrSimulatorReady = false; // VR simulator ready flag static bool vrStereoRender = false; // VR stereo rendering enabled/disabled flag // NOTE: This flag is useful to render data over stereo image (i.e. FPS) #endif // defined(SUPPORT_VR_SIMULATOR) #endif // defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) static int blendMode = 0; // Track current blending mode // Default framebuffer size static int screenWidth; // Default framebuffer width static int screenHeight; // Default framebuffer height //---------------------------------------------------------------------------------- // Module specific Functions Declaration //---------------------------------------------------------------------------------- #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) static unsigned int CompileShader(const char *shaderStr, int type); // Compile custom shader and return shader id static unsigned int LoadShaderProgram(unsigned int vShaderId, unsigned int fShaderId); // Load custom shader program static Shader LoadShaderDefault(void); // Load default shader (just vertex positioning and texture coloring) static void SetShaderDefaultLocations(Shader *shader); // Bind default shader locations (attributes and uniforms) static void UnloadShaderDefault(void); // Unload default shader static void LoadBuffersDefault(void); // Load default internal buffers static void UpdateBuffersDefault(void); // Update default internal buffers (VAOs/VBOs) with vertex data static void DrawBuffersDefault(void); // Draw default internal buffers vertex data static void UnloadBuffersDefault(void); // Unload default internal buffers vertex data from CPU and GPU static void GenDrawCube(void); // Generate and draw cube static void GenDrawQuad(void); // Generate and draw quad #if defined(SUPPORT_VR_SIMULATOR) static void SetStereoConfig(VrDeviceInfo info); // Configure stereo rendering (including distortion shader) with HMD device parameters static void SetStereoView(int eye, Matrix matProjection, Matrix matModelView); // Set internal projection and modelview matrix depending on eye #endif #endif // defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) #if defined(GRAPHICS_API_OPENGL_11) static int GenerateMipmaps(unsigned char *data, int baseWidth, int baseHeight); static Color *GenNextMipmap(Color *srcData, int srcWidth, int srcHeight); #endif //---------------------------------------------------------------------------------- // Module Functions Definition - Matrix operations //---------------------------------------------------------------------------------- #if defined(GRAPHICS_API_OPENGL_11) // Fallback to OpenGL 1.1 function calls //--------------------------------------- void rlMatrixMode(int mode) { switch (mode) { case RL_PROJECTION: glMatrixMode(GL_PROJECTION); break; case RL_MODELVIEW: glMatrixMode(GL_MODELVIEW); break; case RL_TEXTURE: glMatrixMode(GL_TEXTURE); break; default: break; } } void rlFrustum(double left, double right, double bottom, double top, double zNear, double zFar) { glFrustum(left, right, bottom, top, zNear, zFar); } void rlOrtho(double left, double right, double bottom, double top, double zNear, double zFar) { glOrtho(left, right, bottom, top, zNear, zFar); } void rlPushMatrix(void) { glPushMatrix(); } void rlPopMatrix(void) { glPopMatrix(); } void rlLoadIdentity(void) { glLoadIdentity(); } void rlTranslatef(float x, float y, float z) { glTranslatef(x, y, z); } void rlRotatef(float angleDeg, float x, float y, float z) { glRotatef(angleDeg, x, y, z); } void rlScalef(float x, float y, float z) { glScalef(x, y, z); } void rlMultMatrixf(float *matf) { glMultMatrixf(matf); } #elif defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Choose the current matrix to be transformed void rlMatrixMode(int mode) { if (mode == RL_PROJECTION) currentMatrix = &projection; else if (mode == RL_MODELVIEW) currentMatrix = &modelview; //else if (mode == RL_TEXTURE) // Not supported currentMatrixMode = mode; } // Push the current matrix into stack void rlPushMatrix(void) { if (stackCounter >= MAX_MATRIX_STACK_SIZE) TraceLog(LOG_ERROR, "Matrix stack overflow"); if (currentMatrixMode == RL_MODELVIEW) { useTransformMatrix = true; currentMatrix = &transformMatrix; } stack[stackCounter] = *currentMatrix; stackCounter++; } // Pop lattest inserted matrix from stack void rlPopMatrix(void) { if (stackCounter > 0) { Matrix mat = stack[stackCounter - 1]; *currentMatrix = mat; stackCounter--; } if ((stackCounter == 0) && (currentMatrixMode == RL_MODELVIEW)) { currentMatrix = &modelview; useTransformMatrix = false; } } // Reset current matrix to identity matrix void rlLoadIdentity(void) { *currentMatrix = MatrixIdentity(); } // Multiply the current matrix by a translation matrix void rlTranslatef(float x, float y, float z) { Matrix matTranslation = MatrixTranslate(x, y, z); // NOTE: We transpose matrix with multiplication order *currentMatrix = MatrixMultiply(matTranslation, *currentMatrix); } // Multiply the current matrix by a rotation matrix void rlRotatef(float angleDeg, float x, float y, float z) { Matrix matRotation = MatrixIdentity(); Vector3 axis = (Vector3){ x, y, z }; matRotation = MatrixRotate(Vector3Normalize(axis), angleDeg*DEG2RAD); // NOTE: We transpose matrix with multiplication order *currentMatrix = MatrixMultiply(matRotation, *currentMatrix); } // Multiply the current matrix by a scaling matrix void rlScalef(float x, float y, float z) { Matrix matScale = MatrixScale(x, y, z); // NOTE: We transpose matrix with multiplication order *currentMatrix = MatrixMultiply(matScale, *currentMatrix); } // Multiply the current matrix by another matrix void rlMultMatrixf(float *matf) { // Matrix creation from array Matrix mat = { matf[0], matf[4], matf[8], matf[12], matf[1], matf[5], matf[9], matf[13], matf[2], matf[6], matf[10], matf[14], matf[3], matf[7], matf[11], matf[15] }; *currentMatrix = MatrixMultiply(*currentMatrix, mat); } // Multiply the current matrix by a perspective matrix generated by parameters void rlFrustum(double left, double right, double bottom, double top, double near, double far) { Matrix matPerps = MatrixFrustum(left, right, bottom, top, near, far); *currentMatrix = MatrixMultiply(*currentMatrix, matPerps); } // Multiply the current matrix by an orthographic matrix generated by parameters void rlOrtho(double left, double right, double bottom, double top, double near, double far) { Matrix matOrtho = MatrixOrtho(left, right, bottom, top, near, far); *currentMatrix = MatrixMultiply(*currentMatrix, matOrtho); } #endif // Set the viewport area (transformation from normalized device coordinates to window coordinates) // NOTE: Updates global variables: screenWidth, screenHeight void rlViewport(int x, int y, int width, int height) { glViewport(x, y, width, height); } //---------------------------------------------------------------------------------- // Module Functions Definition - Vertex level operations //---------------------------------------------------------------------------------- #if defined(GRAPHICS_API_OPENGL_11) // Fallback to OpenGL 1.1 function calls //--------------------------------------- void rlBegin(int mode) { switch (mode) { case RL_LINES: glBegin(GL_LINES); break; case RL_TRIANGLES: glBegin(GL_TRIANGLES); break; case RL_QUADS: glBegin(GL_QUADS); break; default: break; } } void rlEnd() { glEnd(); } void rlVertex2i(int x, int y) { glVertex2i(x, y); } void rlVertex2f(float x, float y) { glVertex2f(x, y); } void rlVertex3f(float x, float y, float z) { glVertex3f(x, y, z); } void rlTexCoord2f(float x, float y) { glTexCoord2f(x, y); } void rlNormal3f(float x, float y, float z) { glNormal3f(x, y, z); } void rlColor4ub(byte r, byte g, byte b, byte a) { glColor4ub(r, g, b, a); } void rlColor3f(float x, float y, float z) { glColor3f(x, y, z); } void rlColor4f(float x, float y, float z, float w) { glColor4f(x, y, z, w); } #elif defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Initialize drawing mode (how to organize vertex) void rlBegin(int mode) { // Draw mode can be RL_LINES, RL_TRIANGLES and RL_QUADS // NOTE: In all three cases, vertex are accumulated over default internal vertex buffer if (draws[drawsCounter - 1].mode != mode) { if (draws[drawsCounter - 1].vertexCount > 0) drawsCounter++; if (drawsCounter >= MAX_DRAWCALL_REGISTERED) rlglDraw(); draws[drawsCounter - 1].mode = mode; draws[drawsCounter - 1].vertexCount = 0; draws[drawsCounter - 1].textureId = defaultTextureId; } } // Finish vertex providing void rlEnd(void) { // Make sure current draws[i].vertexCount is multiple of 4, to align with index processing // NOTE: It implies adding some extra vertex at the end of the draw, those vertex will be // processed but are placed in a single point to not result in a fragment output... // TODO: System could be improved (a bit) just storing every draw alignment value // and adding it to vertexOffset on drawing... maybe in a future... int vertexCount = draws[drawsCounter - 1].vertexCount; int vertexToAlign = (vertexCount >= 4) ? vertexCount%4 : (4 - vertexCount%4); for (int i = 0; i < vertexToAlign; i++) rlVertex3f(-1, -1, -1); // Make sure vertexCount is the same for vertices, texcoords, colors and normals // NOTE: In OpenGL 1.1, one glColor call can be made for all the subsequent glVertex calls // Make sure colors count match vertex count if (vertexData[currentBuffer].vCounter != vertexData[currentBuffer].cCounter) { int addColors = vertexData[currentBuffer].vCounter - vertexData[currentBuffer].cCounter; for (int i = 0; i < addColors; i++) { vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter] = vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter - 4]; vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter + 1] = vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter - 3]; vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter + 2] = vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter - 2]; vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter + 3] = vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter - 1]; vertexData[currentBuffer].cCounter++; } } // Make sure texcoords count match vertex count if (vertexData[currentBuffer].vCounter != vertexData[currentBuffer].tcCounter) { int addTexCoords = vertexData[currentBuffer].vCounter - vertexData[currentBuffer].tcCounter; for (int i = 0; i < addTexCoords; i++) { vertexData[currentBuffer].texcoords[2*vertexData[currentBuffer].tcCounter] = 0.0f; vertexData[currentBuffer].texcoords[2*vertexData[currentBuffer].tcCounter + 1] = 0.0f; vertexData[currentBuffer].tcCounter++; } } // TODO: Make sure normals count match vertex count... if normals support is added in a future... :P // NOTE: Depth increment is dependant on rlOrtho(): z-near and z-far values, // as well as depth buffer bit-depth (16bit or 24bit or 32bit) // Correct increment formula would be: depthInc = (zfar - znear)/pow(2, bits) currentDepth += (1.0f/20000.0f); // Verify internal buffers limits // NOTE: This check is combined with usage of rlCheckBufferLimit() if ((vertexData[currentBuffer].vCounter) >= (MAX_BATCH_ELEMENTS*4 - 4)) { // WARNING: If we are between rlPushMatrix() and rlPopMatrix() and we need to force a rlglDraw(), // we need to call rlPopMatrix() before to recover *currentMatrix (modelview) for the next forced draw call! // Also noted that if we had multiple matrix pushed, it will require "stackCounter" pops before launching the draw rlPopMatrix(); rlglDraw(); } } // Define one vertex (position) // NOTE: Vertex position data is the basic information required for drawing void rlVertex3f(float x, float y, float z) { Vector3 vec = { x, y, z }; // Transform provided vector if required if (useTransformMatrix) vec = Vector3Transform(vec, transformMatrix); // Verify that MAX_BATCH_ELEMENTS limit not reached if (vertexData[currentBuffer].vCounter < (MAX_BATCH_ELEMENTS*4)) { vertexData[currentBuffer].vertices[3*vertexData[currentBuffer].vCounter] = vec.x; vertexData[currentBuffer].vertices[3*vertexData[currentBuffer].vCounter + 1] = vec.y; vertexData[currentBuffer].vertices[3*vertexData[currentBuffer].vCounter + 2] = vec.z; vertexData[currentBuffer].vCounter++; draws[drawsCounter - 1].vertexCount++; } else TraceLog(LOG_ERROR, "MAX_BATCH_ELEMENTS overflow"); } // Define one vertex (position) void rlVertex2f(float x, float y) { rlVertex3f(x, y, currentDepth); } // Define one vertex (position) void rlVertex2i(int x, int y) { rlVertex3f((float)x, (float)y, currentDepth); } // Define one vertex (texture coordinate) // NOTE: Texture coordinates are limited to QUADS only void rlTexCoord2f(float x, float y) { vertexData[currentBuffer].texcoords[2*vertexData[currentBuffer].tcCounter] = x; vertexData[currentBuffer].texcoords[2*vertexData[currentBuffer].tcCounter + 1] = y; vertexData[currentBuffer].tcCounter++; } // Define one vertex (normal) // NOTE: Normals limited to TRIANGLES only ? void rlNormal3f(float x, float y, float z) { // TODO: Normals usage... } // Define one vertex (color) void rlColor4ub(byte x, byte y, byte z, byte w) { vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter] = x; vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter + 1] = y; vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter + 2] = z; vertexData[currentBuffer].colors[4*vertexData[currentBuffer].cCounter + 3] = w; vertexData[currentBuffer].cCounter++; } // Define one vertex (color) void rlColor4f(float r, float g, float b, float a) { rlColor4ub((byte)(r*255), (byte)(g*255), (byte)(b*255), (byte)(a*255)); } // Define one vertex (color) void rlColor3f(float x, float y, float z) { rlColor4ub((byte)(x*255), (byte)(y*255), (byte)(z*255), 255); } #endif //---------------------------------------------------------------------------------- // Module Functions Definition - OpenGL equivalent functions (common to 1.1, 3.3+, ES2) //---------------------------------------------------------------------------------- // Enable texture usage void rlEnableTexture(unsigned int id) { #if defined(GRAPHICS_API_OPENGL_11) glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, id); #endif #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (draws[drawsCounter - 1].textureId != id) { if (draws[drawsCounter - 1].vertexCount > 0) drawsCounter++; if (drawsCounter >= MAX_DRAWCALL_REGISTERED) rlglDraw(); draws[drawsCounter - 1].textureId = id; draws[drawsCounter - 1].vertexCount = 0; } #endif } // Disable texture usage void rlDisableTexture(void) { #if defined(GRAPHICS_API_OPENGL_11) glDisable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, 0); #else // NOTE: If quads batch limit is reached, // we force a draw call and next batch starts if (vertexData[currentBuffer].vCounter >= (MAX_BATCH_ELEMENTS*4)) rlglDraw(); #endif } // Set texture parameters (wrap mode/filter mode) void rlTextureParameters(unsigned int id, int param, int value) { glBindTexture(GL_TEXTURE_2D, id); switch (param) { case RL_TEXTURE_WRAP_S: case RL_TEXTURE_WRAP_T: { if (value == RL_WRAP_MIRROR_CLAMP) { #if !defined(GRAPHICS_API_OPENGL_11) if (!texMirrorClampSupported) TraceLog(LOG_WARNING, "Clamp mirror wrap mode not supported"); #endif } else glTexParameteri(GL_TEXTURE_2D, param, value); } break; case RL_TEXTURE_MAG_FILTER: case RL_TEXTURE_MIN_FILTER: glTexParameteri(GL_TEXTURE_2D, param, value); break; case RL_TEXTURE_ANISOTROPIC_FILTER: { #if !defined(GRAPHICS_API_OPENGL_11) if (value <= maxAnisotropicLevel) glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, (float)value); else if (maxAnisotropicLevel > 0.0f) { TraceLog(LOG_WARNING, "[TEX ID %i] Maximum anisotropic filter level supported is %iX", id, maxAnisotropicLevel); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, (float)value); } else TraceLog(LOG_WARNING, "Anisotropic filtering not supported"); #endif } break; default: break; } glBindTexture(GL_TEXTURE_2D, 0); } // Enable rendering to texture (fbo) void rlEnableRenderTexture(unsigned int id) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) glBindFramebuffer(GL_FRAMEBUFFER, id); //glDisable(GL_CULL_FACE); // Allow double side drawing for texture flipping //glCullFace(GL_FRONT); #endif } // Disable rendering to texture void rlDisableRenderTexture(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) glBindFramebuffer(GL_FRAMEBUFFER, 0); //glEnable(GL_CULL_FACE); //glCullFace(GL_BACK); #endif } // Enable depth test void rlEnableDepthTest(void) { glEnable(GL_DEPTH_TEST); } // Disable depth test void rlDisableDepthTest(void) { glDisable(GL_DEPTH_TEST); } // Enable wire mode void rlEnableWireMode(void) { #if defined (GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33) // NOTE: glPolygonMode() not available on OpenGL ES glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); #endif } // Disable wire mode void rlDisableWireMode(void) { #if defined (GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33) // NOTE: glPolygonMode() not available on OpenGL ES glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); #endif } // Unload texture from GPU memory void rlDeleteTextures(unsigned int id) { if (id > 0) glDeleteTextures(1, &id); } // Unload render texture from GPU memory void rlDeleteRenderTextures(RenderTexture2D target) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (target.texture.id > 0) glDeleteTextures(1, &target.texture.id); if (target.depth.id > 0) { #if defined(GRAPHICS_API_OPENGL_21) || defined(GRAPHICS_API_OPENGL_ES2) glDeleteRenderbuffers(1, &target.depth.id); #elif defined(GRAPHICS_API_OPENGL_33) glDeleteTextures(1, &target.depth.id); #endif } if (target.id > 0) glDeleteFramebuffers(1, &target.id); TraceLog(LOG_INFO, "[FBO ID %i] Unloaded render texture data from VRAM (GPU)", target.id); #endif } // Unload shader from GPU memory void rlDeleteShader(unsigned int id) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (id != 0) glDeleteProgram(id); #endif } // Unload vertex data (VAO) from GPU memory void rlDeleteVertexArrays(unsigned int id) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (vaoSupported) { if (id != 0) glDeleteVertexArrays(1, &id); TraceLog(LOG_INFO, "[VAO ID %i] Unloaded model data from VRAM (GPU)", id); } #endif } // Unload vertex data (VBO) from GPU memory void rlDeleteBuffers(unsigned int id) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (id != 0) { glDeleteBuffers(1, &id); if (!vaoSupported) TraceLog(LOG_INFO, "[VBO ID %i] Unloaded model vertex data from VRAM (GPU)", id); } #endif } // Clear color buffer with color void rlClearColor(byte r, byte g, byte b, byte a) { // Color values clamp to 0.0f(0) and 1.0f(255) float cr = (float)r/255; float cg = (float)g/255; float cb = (float)b/255; float ca = (float)a/255; glClearColor(cr, cg, cb, ca); } // Clear used screen buffers (color and depth) void rlClearScreenBuffers(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear used buffers: Color and Depth (Depth is used for 3D) //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); // Stencil buffer not used... } //---------------------------------------------------------------------------------- // Module Functions Definition - rlgl Functions //---------------------------------------------------------------------------------- // Initialize rlgl: OpenGL extensions, default buffers/shaders/textures, OpenGL states void rlglInit(int width, int height) { // Check OpenGL information and capabilities //------------------------------------------------------------------------------ // Print current OpenGL and GLSL version TraceLog(LOG_INFO, "GPU: Vendor: %s", glGetString(GL_VENDOR)); TraceLog(LOG_INFO, "GPU: Renderer: %s", glGetString(GL_RENDERER)); TraceLog(LOG_INFO, "GPU: Version: %s", glGetString(GL_VERSION)); TraceLog(LOG_INFO, "GPU: GLSL: %s", glGetString(GL_SHADING_LANGUAGE_VERSION)); // NOTE: We can get a bunch of extra information about GPU capabilities (glGet*) //int maxTexSize; //glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTexSize); //TraceLog(LOG_INFO, "GL_MAX_TEXTURE_SIZE: %i", maxTexSize); //GL_MAX_TEXTURE_IMAGE_UNITS //GL_MAX_VIEWPORT_DIMS //int numAuxBuffers; //glGetIntegerv(GL_AUX_BUFFERS, &numAuxBuffers); //TraceLog(LOG_INFO, "GL_AUX_BUFFERS: %i", numAuxBuffers); //GLint numComp = 0; //GLint format[32] = { 0 }; //glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numComp); //glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, format); //for (int i = 0; i < numComp; i++) TraceLog(LOG_INFO, "Supported compressed format: 0x%x", format[i]); // NOTE: We don't need that much data on screen... right now... // TODO: Automatize extensions loading using rlLoadExtensions() and GLAD // Actually, when rlglInit() is called in InitWindow() in core.c, // OpenGL required extensions have already been loaded (PLATFORM_DESKTOP) #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Get supported extensions list GLint numExt = 0; #if defined(GRAPHICS_API_OPENGL_33) // NOTE: On OpenGL 3.3 VAO and NPOT are supported by default vaoSupported = true; texNPOTSupported = true; texFloatSupported = true; // We get a list of available extensions and we check for some of them (compressed textures) // NOTE: We don't need to check again supported extensions but we do (GLAD already dealt with that) glGetIntegerv(GL_NUM_EXTENSIONS, &numExt); #if defined(_MSC_VER) const char **extList = malloc(sizeof(const char *)*numExt); #else const char *extList[numExt]; #endif for (int i = 0; i < numExt; i++) extList[i] = (char *)glGetStringi(GL_EXTENSIONS, i); #elif defined(GRAPHICS_API_OPENGL_ES2) char *extensions = (char *)glGetString(GL_EXTENSIONS); // One big const string // NOTE: We have to duplicate string because glGetString() returns a const string int len = strlen(extensions) + 1; char *extensionsDup = (char *)malloc(len); strcpy(extensionsDup, extensions); // NOTE: String could be splitted using strtok() function (string.h) // NOTE: strtok() modifies the passed string, it can not be const char *extList[512]; // Allocate 512 strings pointers (2 KB) extList[numExt] = strtok(extensionsDup, " "); while (extList[numExt] != NULL) { numExt++; extList[numExt] = strtok(NULL, " "); } free(extensionsDup); // Duplicated string must be deallocated numExt -= 1; #endif TraceLog(LOG_INFO, "Number of supported extensions: %i", numExt); // Show supported extensions //for (int i = 0; i < numExt; i++) TraceLog(LOG_INFO, "Supported extension: %s", extList[i]); // Check required extensions for (int i = 0; i < numExt; i++) { #if defined(GRAPHICS_API_OPENGL_ES2) // Check VAO support // NOTE: Only check on OpenGL ES, OpenGL 3.3 has VAO support as core feature if (strcmp(extList[i], (const char *)"GL_OES_vertex_array_object") == 0) { vaoSupported = true; // The extension is supported by our hardware and driver, try to get related functions pointers // NOTE: emscripten does not support VAOs natively, it uses emulation and it reduces overall performance... glGenVertexArrays = (PFNGLGENVERTEXARRAYSOESPROC)eglGetProcAddress("glGenVertexArraysOES"); glBindVertexArray = (PFNGLBINDVERTEXARRAYOESPROC)eglGetProcAddress("glBindVertexArrayOES"); glDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSOESPROC)eglGetProcAddress("glDeleteVertexArraysOES"); //glIsVertexArray = (PFNGLISVERTEXARRAYOESPROC)eglGetProcAddress("glIsVertexArrayOES"); // NOTE: Fails in WebGL, omitted } // Check NPOT textures support // NOTE: Only check on OpenGL ES, OpenGL 3.3 has NPOT textures full support as core feature if (strcmp(extList[i], (const char *)"GL_OES_texture_npot") == 0) texNPOTSupported = true; // Check texture float support if (strcmp(extList[i], (const char *)"GL_OES_texture_float") == 0) texFloatSupported = true; #endif // DDS texture compression support if ((strcmp(extList[i], (const char *)"GL_EXT_texture_compression_s3tc") == 0) || (strcmp(extList[i], (const char *)"GL_WEBGL_compressed_texture_s3tc") == 0) || (strcmp(extList[i], (const char *)"GL_WEBKIT_WEBGL_compressed_texture_s3tc") == 0)) texCompDXTSupported = true; // ETC1 texture compression support if ((strcmp(extList[i], (const char *)"GL_OES_compressed_ETC1_RGB8_texture") == 0) || (strcmp(extList[i], (const char *)"GL_WEBGL_compressed_texture_etc1") == 0)) texCompETC1Supported = true; // ETC2/EAC texture compression support if (strcmp(extList[i], (const char *)"GL_ARB_ES3_compatibility") == 0) texCompETC2Supported = true; // PVR texture compression support if (strcmp(extList[i], (const char *)"GL_IMG_texture_compression_pvrtc") == 0) texCompPVRTSupported = true; // ASTC texture compression support if (strcmp(extList[i], (const char *)"GL_KHR_texture_compression_astc_hdr") == 0) texCompASTCSupported = true; // Anisotropic texture filter support if (strcmp(extList[i], (const char *)"GL_EXT_texture_filter_anisotropic") == 0) { texAnisotropicFilterSupported = true; glGetFloatv(0x84FF, &maxAnisotropicLevel); // GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT } // Clamp mirror wrap mode supported if (strcmp(extList[i], (const char *)"GL_EXT_texture_mirror_clamp") == 0) texMirrorClampSupported = true; // Debug marker support if(strcmp(extList[i], (const char *)"GL_EXT_debug_marker") == 0) debugMarkerSupported = true; } #if defined(_WIN32) && defined(_MSC_VER) free(extList); #endif #if defined(GRAPHICS_API_OPENGL_ES2) if (vaoSupported) TraceLog(LOG_INFO, "[EXTENSION] VAO extension detected, VAO functions initialized successfully"); else TraceLog(LOG_WARNING, "[EXTENSION] VAO extension not found, VAO usage not supported"); if (texNPOTSupported) TraceLog(LOG_INFO, "[EXTENSION] NPOT textures extension detected, full NPOT textures supported"); else TraceLog(LOG_WARNING, "[EXTENSION] NPOT textures extension not found, limited NPOT support (no-mipmaps, no-repeat)"); #endif if (texCompDXTSupported) TraceLog(LOG_INFO, "[EXTENSION] DXT compressed textures supported"); if (texCompETC1Supported) TraceLog(LOG_INFO, "[EXTENSION] ETC1 compressed textures supported"); if (texCompETC2Supported) TraceLog(LOG_INFO, "[EXTENSION] ETC2/EAC compressed textures supported"); if (texCompPVRTSupported) TraceLog(LOG_INFO, "[EXTENSION] PVRT compressed textures supported"); if (texCompASTCSupported) TraceLog(LOG_INFO, "[EXTENSION] ASTC compressed textures supported"); if (texAnisotropicFilterSupported) TraceLog(LOG_INFO, "[EXTENSION] Anisotropic textures filtering supported (max: %.0fX)", maxAnisotropicLevel); if (texMirrorClampSupported) TraceLog(LOG_INFO, "[EXTENSION] Mirror clamp wrap texture mode supported"); if (debugMarkerSupported) TraceLog(LOG_INFO, "[EXTENSION] Debug Marker supported"); // Initialize buffers, default shaders and default textures //---------------------------------------------------------- // Init default white texture unsigned char pixels[4] = { 255, 255, 255, 255 }; // 1 pixel RGBA (4 bytes) defaultTextureId = rlLoadTexture(pixels, 1, 1, UNCOMPRESSED_R8G8B8A8, 1); if (defaultTextureId != 0) TraceLog(LOG_INFO, "[TEX ID %i] Base white texture loaded successfully", defaultTextureId); else TraceLog(LOG_WARNING, "Base white texture could not be loaded"); // Init default Shader (customized for GL 3.3 and ES2) defaultShader = LoadShaderDefault(); currentShader = defaultShader; // Init default vertex arrays buffers LoadBuffersDefault(); // Init transformations matrix accumulator transformMatrix = MatrixIdentity(); // Init draw calls tracking system draws = (DrawCall *)malloc(sizeof(DrawCall)*MAX_DRAWCALL_REGISTERED); for (int i = 0; i < MAX_DRAWCALL_REGISTERED; i++) { draws[i].mode = RL_QUADS; draws[i].vertexCount = 0; //draws[i].vaoId = 0; //draws[i].shaderId = 0; draws[i].textureId = defaultTextureId; //draws[i].projection = MatrixIdentity(); //draws[i].modelview = MatrixIdentity(); } drawsCounter = 1; // Init internal matrix stack (emulating OpenGL 1.1) for (int i = 0; i < MAX_MATRIX_STACK_SIZE; i++) stack[i] = MatrixIdentity(); // Init internal projection and modelview matrices projection = MatrixIdentity(); modelview = MatrixIdentity(); currentMatrix = &modelview; #endif // defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Initialize OpenGL default states //---------------------------------------------------------- // Init state: Depth test glDepthFunc(GL_LEQUAL); // Type of depth testing to apply glDisable(GL_DEPTH_TEST); // Disable depth testing for 2D (only used for 3D) // Init state: Blending mode glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Color blending function (how colors are mixed) glEnable(GL_BLEND); // Enable color blending (required to work with transparencies) // Init state: Culling // NOTE: All shapes/models triangles are drawn CCW glCullFace(GL_BACK); // Cull the back face (default) glFrontFace(GL_CCW); // Front face are defined counter clockwise (default) glEnable(GL_CULL_FACE); // Enable backface culling #if defined(GRAPHICS_API_OPENGL_11) // Init state: Color hints (deprecated in OpenGL 3.0+) glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Improve quality of color and texture coordinate interpolation glShadeModel(GL_SMOOTH); // Smooth shading between vertex (vertex colors interpolation) #endif // Init state: Color/Depth buffers clear glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Set clear color (black) glClearDepth(1.0f); // Set clear depth value (default) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear color and depth buffers (depth buffer required for 3D) // Store screen size into global variables screenWidth = width; screenHeight = height; TraceLog(LOG_INFO, "OpenGL default states initialized successfully"); } // Vertex Buffer Object deinitialization (memory free) void rlglClose(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) UnloadShaderDefault(); // Unload default shader UnloadBuffersDefault(); // Unload default buffers glDeleteTextures(1, &defaultTextureId); // Unload default texture TraceLog(LOG_INFO, "[TEX ID %i] Unloaded texture data (base white texture) from VRAM", defaultTextureId); free(draws); #endif } // Update and draw internal buffers void rlglDraw(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) UpdateBuffersDefault(); DrawBuffersDefault(); // NOTE: Stereo rendering is checked inside #endif } // Returns current OpenGL version int rlGetVersion(void) { #if defined(GRAPHICS_API_OPENGL_11) return OPENGL_11; #elif defined(GRAPHICS_API_OPENGL_21) #if defined(__APPLE__) return OPENGL_33; // NOTE: Force OpenGL 3.3 on OSX #else return OPENGL_21; #endif #elif defined(GRAPHICS_API_OPENGL_33) return OPENGL_33; #elif defined(GRAPHICS_API_OPENGL_ES2) return OPENGL_ES_20; #endif } // Check internal buffer overflow for a given number of vertex bool rlCheckBufferLimit(int vCount) { bool overflow = false; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if ((vertexData[currentBuffer].vCounter + vCount) >= (MAX_BATCH_ELEMENTS*4)) overflow = true; #endif return overflow; } // Set debug marker void rlSetDebugMarker(const char *text) { #if defined(GRAPHICS_API_OPENGL_33) if (debugMarkerSupported) glInsertEventMarkerEXT(0, text); #endif } // Load OpenGL extensions // NOTE: External loader function could be passed as a pointer void rlLoadExtensions(void *loader) { #if defined(GRAPHICS_API_OPENGL_33) // NOTE: glad is generated and contains only required OpenGL 3.3 Core extensions (and lower versions) #if !defined(__APPLE__) if (!gladLoadGLLoader((GLADloadproc)loader)) TraceLog(LOG_WARNING, "GLAD: Cannot load OpenGL extensions"); else TraceLog(LOG_INFO, "GLAD: OpenGL extensions loaded successfully"); #if defined(GRAPHICS_API_OPENGL_21) if (GLAD_GL_VERSION_2_1) TraceLog(LOG_INFO, "OpenGL 2.1 profile supported"); #elif defined(GRAPHICS_API_OPENGL_33) if(GLAD_GL_VERSION_3_3) TraceLog(LOG_INFO, "OpenGL 3.3 Core profile supported"); else TraceLog(LOG_ERROR, "OpenGL 3.3 Core profile not supported"); #endif #endif // With GLAD, we can check if an extension is supported using the GLAD_GL_xxx booleans //if (GLAD_GL_ARB_vertex_array_object) // Use GL_ARB_vertex_array_object #endif } // Get world coordinates from screen coordinates Vector3 rlUnproject(Vector3 source, Matrix proj, Matrix view) { Vector3 result = { 0.0f, 0.0f, 0.0f }; // Calculate unproject matrix (multiply view patrix by projection matrix) and invert it Matrix matViewProj = MatrixMultiply(view, proj); matViewProj = MatrixInvert(matViewProj); // Create quaternion from source point Quaternion quat = { source.x, source.y, source.z, 1.0f }; // Multiply quat point by unproject matrix quat = QuaternionTransform(quat, matViewProj); // Normalized world points in vectors result.x = quat.x/quat.w; result.y = quat.y/quat.w; result.z = quat.z/quat.w; return result; } // Convert image data to OpenGL texture (returns OpenGL valid Id) unsigned int rlLoadTexture(void *data, int width, int height, int format, int mipmapCount) { glBindTexture(GL_TEXTURE_2D, 0); // Free any old binding GLuint id = 0; // Check texture format support by OpenGL 1.1 (compressed textures not supported) #if defined(GRAPHICS_API_OPENGL_11) if (format >= COMPRESSED_DXT1_RGB) { TraceLog(LOG_WARNING, "OpenGL 1.1 does not support GPU compressed texture formats"); return id; } #else if ((!texCompDXTSupported) && ((format == COMPRESSED_DXT1_RGB) || (format == COMPRESSED_DXT1_RGBA) || (format == COMPRESSED_DXT3_RGBA) || (format == COMPRESSED_DXT5_RGBA))) { TraceLog(LOG_WARNING, "DXT compressed texture format not supported"); return id; } #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if ((!texCompETC1Supported) && (format == COMPRESSED_ETC1_RGB)) { TraceLog(LOG_WARNING, "ETC1 compressed texture format not supported"); return id; } if ((!texCompETC2Supported) && ((format == COMPRESSED_ETC2_RGB) || (format == COMPRESSED_ETC2_EAC_RGBA))) { TraceLog(LOG_WARNING, "ETC2 compressed texture format not supported"); return id; } if ((!texCompPVRTSupported) && ((format == COMPRESSED_PVRT_RGB) || (format == COMPRESSED_PVRT_RGBA))) { TraceLog(LOG_WARNING, "PVRT compressed texture format not supported"); return id; } if ((!texCompASTCSupported) && ((format == COMPRESSED_ASTC_4x4_RGBA) || (format == COMPRESSED_ASTC_8x8_RGBA))) { TraceLog(LOG_WARNING, "ASTC compressed texture format not supported"); return id; } #endif #endif // defined(GRAPHICS_API_OPENGL_11) glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glGenTextures(1, &id); // Generate Pointer to the texture #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) //glActiveTexture(GL_TEXTURE0); // If not defined, using GL_TEXTURE0 by default (shader texture) #endif glBindTexture(GL_TEXTURE_2D, id); int mipWidth = width; int mipHeight = height; int mipOffset = 0; // Mipmap data offset TraceLog(LOG_DEBUG, "Load texture from data memory address: 0x%x", data); // Load the different mipmap levels for (int i = 0; i < mipmapCount; i++) { unsigned int mipSize = GetPixelDataSize(mipWidth, mipHeight, format); unsigned int glInternalFormat, glFormat, glType; rlGetGlTextureFormats(format, &glInternalFormat, &glFormat, &glType); TraceLog(LOG_DEBUG, "Load mipmap level %i (%i x %i), size: %i, offset: %i", i, mipWidth, mipHeight, mipSize, mipOffset); if (glInternalFormat != -1) { if (format < COMPRESSED_DXT1_RGB) glTexImage2D(GL_TEXTURE_2D, i, glInternalFormat, mipWidth, mipHeight, 0, glFormat, glType, (unsigned char *)data + mipOffset); #if !defined(GRAPHICS_API_OPENGL_11) else glCompressedTexImage2D(GL_TEXTURE_2D, i, glInternalFormat, mipWidth, mipHeight, 0, mipSize, (unsigned char *)data + mipOffset); #endif #if defined(GRAPHICS_API_OPENGL_33) if (format == UNCOMPRESSED_GRAYSCALE) { GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_ONE }; glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask); } else if (format == UNCOMPRESSED_GRAY_ALPHA) { #if defined(GRAPHICS_API_OPENGL_21) GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_ALPHA }; #elif defined(GRAPHICS_API_OPENGL_33) GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_GREEN }; #endif glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask); } #endif } mipWidth /= 2; mipHeight /= 2; mipOffset += mipSize; // Security check for NPOT textures if (mipWidth < 1) mipWidth = 1; if (mipHeight < 1) mipHeight = 1; } // Texture parameters configuration // NOTE: glTexParameteri does NOT affect texture uploading, just the way it's used #if defined(GRAPHICS_API_OPENGL_ES2) // NOTE: OpenGL ES 2.0 with no GL_OES_texture_npot support (i.e. WebGL) has limited NPOT support, so CLAMP_TO_EDGE must be used if (texNPOTSupported) { glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture to repeat on x-axis glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); // Set texture to repeat on y-axis } else { // NOTE: If using negative texture coordinates (LoadOBJ()), it does not work! glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // Set texture to clamp on x-axis glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); // Set texture to clamp on y-axis } #else glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture to repeat on x-axis glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); // Set texture to repeat on y-axis #endif // Magnification and minification filters glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); // Alternative: GL_LINEAR glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); // Alternative: GL_LINEAR #if defined(GRAPHICS_API_OPENGL_33) if (mipmapCount > 1) { // Activate Trilinear filtering if mipmaps are available glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); } #endif // At this point we have the texture loaded in GPU and texture parameters configured // NOTE: If mipmaps were not in data, they are not generated automatically // Unbind current texture glBindTexture(GL_TEXTURE_2D, 0); if (id > 0) TraceLog(LOG_INFO, "[TEX ID %i] Texture created successfully (%ix%i - %i mipmaps)", id, width, height, mipmapCount); else TraceLog(LOG_WARNING, "Texture could not be created"); return id; } // Update already loaded texture in GPU with new data // TODO: We don't know safely if internal texture format is the expected one... void rlUpdateTexture(unsigned int id, int width, int height, int format, const void *data) { glBindTexture(GL_TEXTURE_2D, id); unsigned int glInternalFormat, glFormat, glType; rlGetGlTextureFormats(format, &glInternalFormat, &glFormat, &glType); if ((glInternalFormat != -1) && (format < COMPRESSED_DXT1_RGB)) { glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, glFormat, glType, (unsigned char *)data); } else TraceLog(LOG_WARNING, "Texture format updating not supported"); } // Get OpenGL internal formats and data type from raylib PixelFormat void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned int *glFormat, unsigned int *glType) { *glInternalFormat = -1; *glFormat = -1; *glType = -1; switch (format) { #if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_21) || defined(GRAPHICS_API_OPENGL_ES2) // NOTE: on OpenGL ES 2.0 (WebGL), internalFormat must match format and options allowed are: GL_LUMINANCE, GL_RGB, GL_RGBA case UNCOMPRESSED_GRAYSCALE: *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_GRAY_ALPHA: *glInternalFormat = GL_LUMINANCE_ALPHA; *glFormat = GL_LUMINANCE_ALPHA; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_R5G6B5: *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_UNSIGNED_SHORT_5_6_5; break; case UNCOMPRESSED_R8G8B8: *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_R5G5B5A1: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_5_5_5_1; break; case UNCOMPRESSED_R4G4B4A4: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_4_4_4_4; break; case UNCOMPRESSED_R8G8B8A8: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_BYTE; break; #if !defined(GRAPHICS_API_OPENGL_11) case UNCOMPRESSED_R32: if (texFloatSupported) *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float case UNCOMPRESSED_R32G32B32: if (texFloatSupported) *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float case UNCOMPRESSED_R32G32B32A32: if (texFloatSupported) *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float #endif #elif defined(GRAPHICS_API_OPENGL_33) case UNCOMPRESSED_GRAYSCALE: *glInternalFormat = GL_R8; *glFormat = GL_RED; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_GRAY_ALPHA: *glInternalFormat = GL_RG8; *glFormat = GL_RG; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_R5G6B5: *glInternalFormat = GL_RGB565; *glFormat = GL_RGB; *glType = GL_UNSIGNED_SHORT_5_6_5; break; case UNCOMPRESSED_R8G8B8: *glInternalFormat = GL_RGB8; *glFormat = GL_RGB; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_R5G5B5A1: *glInternalFormat = GL_RGB5_A1; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_5_5_5_1; break; case UNCOMPRESSED_R4G4B4A4: *glInternalFormat = GL_RGBA4; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_4_4_4_4; break; case UNCOMPRESSED_R8G8B8A8: *glInternalFormat = GL_RGBA8; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_BYTE; break; case UNCOMPRESSED_R32: if (texFloatSupported) *glInternalFormat = GL_R32F; *glFormat = GL_RED; *glType = GL_FLOAT; break; case UNCOMPRESSED_R32G32B32: if (texFloatSupported) *glInternalFormat = GL_RGB32F; *glFormat = GL_RGB; *glType = GL_FLOAT; break; case UNCOMPRESSED_R32G32B32A32: if (texFloatSupported) *glInternalFormat = GL_RGBA32F; *glFormat = GL_RGBA; *glType = GL_FLOAT; break; #endif #if !defined(GRAPHICS_API_OPENGL_11) case COMPRESSED_DXT1_RGB: if (texCompDXTSupported) *glInternalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break; case COMPRESSED_DXT1_RGBA: if (texCompDXTSupported) *glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; break; case COMPRESSED_DXT3_RGBA: if (texCompDXTSupported) *glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; break; case COMPRESSED_DXT5_RGBA: if (texCompDXTSupported) *glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; break; case COMPRESSED_ETC1_RGB: if (texCompETC1Supported) *glInternalFormat = GL_ETC1_RGB8_OES; break; // NOTE: Requires OpenGL ES 2.0 or OpenGL 4.3 case COMPRESSED_ETC2_RGB: if (texCompETC2Supported) *glInternalFormat = GL_COMPRESSED_RGB8_ETC2; break; // NOTE: Requires OpenGL ES 3.0 or OpenGL 4.3 case COMPRESSED_ETC2_EAC_RGBA: if (texCompETC2Supported) *glInternalFormat = GL_COMPRESSED_RGBA8_ETC2_EAC; break; // NOTE: Requires OpenGL ES 3.0 or OpenGL 4.3 case COMPRESSED_PVRT_RGB: if (texCompPVRTSupported) *glInternalFormat = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG; break; // NOTE: Requires PowerVR GPU case COMPRESSED_PVRT_RGBA: if (texCompPVRTSupported) *glInternalFormat = GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG; break; // NOTE: Requires PowerVR GPU case COMPRESSED_ASTC_4x4_RGBA: if (texCompASTCSupported) *glInternalFormat = GL_COMPRESSED_RGBA_ASTC_4x4_KHR; break; // NOTE: Requires OpenGL ES 3.1 or OpenGL 4.3 case COMPRESSED_ASTC_8x8_RGBA: if (texCompASTCSupported) *glInternalFormat = GL_COMPRESSED_RGBA_ASTC_8x8_KHR; break; // NOTE: Requires OpenGL ES 3.1 or OpenGL 4.3 #endif default: TraceLog(LOG_WARNING, "Texture format not supported"); break; } } // Unload texture from GPU memory void rlUnloadTexture(unsigned int id) { if (id > 0) glDeleteTextures(1, &id); } // Load a texture to be used for rendering (fbo with color and depth attachments) RenderTexture2D rlLoadRenderTexture(int width, int height) { RenderTexture2D target = { 0 }; target.id = 0; target.texture.id = 0; target.texture.width = width; target.texture.height = height; target.texture.format = UNCOMPRESSED_R8G8B8A8; target.texture.mipmaps = 1; target.depth.id = 0; target.depth.width = width; target.depth.height = height; target.depth.format = 19; //DEPTH_COMPONENT_24BIT target.depth.mipmaps = 1; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Create the texture that will serve as the color attachment for the framebuffer glGenTextures(1, &target.texture.id); glBindTexture(GL_TEXTURE_2D, target.texture.id); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); glBindTexture(GL_TEXTURE_2D, 0); #if defined(GRAPHICS_API_OPENGL_21) || defined(GRAPHICS_API_OPENGL_ES2) #define USE_DEPTH_RENDERBUFFER #else #define USE_DEPTH_TEXTURE #endif #if defined(USE_DEPTH_RENDERBUFFER) // Create the renderbuffer that will serve as the depth attachment for the framebuffer. glGenRenderbuffers(1, &target.depth.id); glBindRenderbuffer(GL_RENDERBUFFER, target.depth.id); glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height); // GL_DEPTH_COMPONENT24 not supported on Android #elif defined(USE_DEPTH_TEXTURE) // NOTE: We can also use a texture for depth buffer (GL_ARB_depth_texture/GL_OES_depth_texture extension required) // A renderbuffer is simpler than a texture and could offer better performance on embedded devices glGenTextures(1, &target.depth.id); glBindTexture(GL_TEXTURE_2D, target.depth.id); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, width, height, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL); glBindTexture(GL_TEXTURE_2D, 0); #endif // Create the framebuffer object glGenFramebuffers(1, &target.id); glBindFramebuffer(GL_FRAMEBUFFER, target.id); // Attach color texture and depth renderbuffer to FBO glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, target.texture.id, 0); #if defined(USE_DEPTH_RENDERBUFFER) glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, target.depth.id); #elif defined(USE_DEPTH_TEXTURE) glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, target.depth.id, 0); #endif GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER); if (status != GL_FRAMEBUFFER_COMPLETE) { TraceLog(LOG_WARNING, "Framebuffer object could not be created..."); switch (status) { case GL_FRAMEBUFFER_UNSUPPORTED: TraceLog(LOG_WARNING, "Framebuffer is unsupported"); break; case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT: TraceLog(LOG_WARNING, "Framebuffer incomplete attachment"); break; #if defined(GRAPHICS_API_OPENGL_ES2) case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS: TraceLog(LOG_WARNING, "Framebuffer incomplete dimensions"); break; #endif case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: TraceLog(LOG_WARNING, "Framebuffer incomplete missing attachment"); break; default: break; } if (target.texture.id > 0) glDeleteTextures(1, &target.texture.id); if (target.depth.id > 0) { #if defined(USE_DEPTH_RENDERBUFFER) glDeleteRenderbuffers(1, &target.depth.id); #elif defined(USE_DEPTH_TEXTURE) glDeleteTextures(1, &target.depth.id); #endif } glDeleteFramebuffers(1, &target.id); } else TraceLog(LOG_INFO, "[FBO ID %i] Framebuffer object created successfully", target.id); glBindFramebuffer(GL_FRAMEBUFFER, 0); #endif return target; } // Generate mipmap data for selected texture void rlGenerateMipmaps(Texture2D *texture) { glBindTexture(GL_TEXTURE_2D, texture->id); // Check if texture is power-of-two (POT) bool texIsPOT = false; if (((texture->width > 0) && ((texture->width & (texture->width - 1)) == 0)) && ((texture->height > 0) && ((texture->height & (texture->height - 1)) == 0))) texIsPOT = true; #if defined(GRAPHICS_API_OPENGL_11) if (texIsPOT) { // WARNING: Manual mipmap generation only works for RGBA 32bit textures! if (texture->format == UNCOMPRESSED_R8G8B8A8) { // Retrieve texture data from VRAM void *data = rlReadTexturePixels(*texture); // NOTE: data size is reallocated to fit mipmaps data // NOTE: CPU mipmap generation only supports RGBA 32bit data int mipmapCount = GenerateMipmaps(data, texture->width, texture->height); int size = texture->width*texture->height*4; int offset = size; int mipWidth = texture->width/2; int mipHeight = texture->height/2; // Load the mipmaps for (int level = 1; level < mipmapCount; level++) { glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA8, mipWidth, mipHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char *)data + offset); size = mipWidth*mipHeight*4; offset += size; mipWidth /= 2; mipHeight /= 2; } texture->mipmaps = mipmapCount + 1; free(data); // Once mipmaps have been generated and data has been uploaded to GPU VRAM, we can discard RAM data TraceLog(LOG_WARNING, "[TEX ID %i] Mipmaps [%i] generated manually on CPU side", texture->id, texture->mipmaps); } else TraceLog(LOG_WARNING, "[TEX ID %i] Mipmaps could not be generated for texture format", texture->id); } #elif defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if ((texIsPOT) || (texNPOTSupported)) { //glHint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE); // Hint for mipmaps generation algorythm: GL_FASTEST, GL_NICEST, GL_DONT_CARE glGenerateMipmap(GL_TEXTURE_2D); // Generate mipmaps automatically TraceLog(LOG_INFO, "[TEX ID %i] Mipmaps generated automatically", texture->id); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); // Activate Trilinear filtering for mipmaps #define MIN(a,b) (((a)<(b))?(a):(b)) #define MAX(a,b) (((a)>(b))?(a):(b)) texture->mipmaps = 1 + (int)floor(log(MAX(texture->width, texture->height))/log(2)); } #endif else TraceLog(LOG_WARNING, "[TEX ID %i] Mipmaps can not be generated", texture->id); glBindTexture(GL_TEXTURE_2D, 0); } // Upload vertex data into a VAO (if supported) and VBO // TODO: Check if mesh has already been loaded in GPU void rlLoadMesh(Mesh *mesh, bool dynamic) { mesh->vaoId = 0; // Vertex Array Object mesh->vboId[0] = 0; // Vertex positions VBO mesh->vboId[1] = 0; // Vertex texcoords VBO mesh->vboId[2] = 0; // Vertex normals VBO mesh->vboId[3] = 0; // Vertex colors VBO mesh->vboId[4] = 0; // Vertex tangents VBO mesh->vboId[5] = 0; // Vertex texcoords2 VBO mesh->vboId[6] = 0; // Vertex indices VBO #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) int drawHint = GL_STATIC_DRAW; if (dynamic) drawHint = GL_DYNAMIC_DRAW; if (vaoSupported) { // Initialize Quads VAO (Buffer A) glGenVertexArrays(1, &mesh->vaoId); glBindVertexArray(mesh->vaoId); } // NOTE: Attributes must be uploaded considering default locations points // Enable vertex attributes: position (shader-location = 0) glGenBuffers(1, &mesh->vboId[0]); glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId[0]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->vertices, drawHint); glVertexAttribPointer(0, 3, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(0); // Enable vertex attributes: texcoords (shader-location = 1) glGenBuffers(1, &mesh->vboId[1]); glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId[1]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*mesh->vertexCount, mesh->texcoords, drawHint); glVertexAttribPointer(1, 2, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(1); // Enable vertex attributes: normals (shader-location = 2) if (mesh->normals != NULL) { glGenBuffers(1, &mesh->vboId[2]); glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId[2]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->normals, drawHint); glVertexAttribPointer(2, 3, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(2); } else { // Default color vertex attribute set to WHITE glVertexAttrib3f(2, 1.0f, 1.0f, 1.0f); glDisableVertexAttribArray(2); } // Default color vertex attribute (shader-location = 3) if (mesh->colors != NULL) { glGenBuffers(1, &mesh->vboId[3]); glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId[3]); glBufferData(GL_ARRAY_BUFFER, sizeof(unsigned char)*4*mesh->vertexCount, mesh->colors, drawHint); glVertexAttribPointer(3, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0); glEnableVertexAttribArray(3); } else { // Default color vertex attribute set to WHITE glVertexAttrib4f(3, 1.0f, 1.0f, 1.0f, 1.0f); glDisableVertexAttribArray(3); } // Default tangent vertex attribute (shader-location = 4) if (mesh->tangents != NULL) { glGenBuffers(1, &mesh->vboId[4]); glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId[4]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*4*mesh->vertexCount, mesh->tangents, drawHint); glVertexAttribPointer(4, 4, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(4); } else { // Default tangents vertex attribute glVertexAttrib4f(4, 0.0f, 0.0f, 0.0f, 0.0f); glDisableVertexAttribArray(4); } // Default texcoord2 vertex attribute (shader-location = 5) if (mesh->texcoords2 != NULL) { glGenBuffers(1, &mesh->vboId[5]); glBindBuffer(GL_ARRAY_BUFFER, mesh->vboId[5]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*mesh->vertexCount, mesh->texcoords2, drawHint); glVertexAttribPointer(5, 2, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(5); } else { // Default texcoord2 vertex attribute glVertexAttrib2f(5, 0.0f, 0.0f); glDisableVertexAttribArray(5); } if (mesh->indices != NULL) { glGenBuffers(1, &mesh->vboId[6]); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->vboId[6]); glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned short)*mesh->triangleCount*3, mesh->indices, GL_STATIC_DRAW); } if (vaoSupported) { if (mesh->vaoId > 0) TraceLog(LOG_INFO, "[VAO ID %i] Mesh uploaded successfully to VRAM (GPU)", mesh->vaoId); else TraceLog(LOG_WARNING, "Mesh could not be uploaded to VRAM (GPU)"); } else { TraceLog(LOG_INFO, "[VBOs] Mesh uploaded successfully to VRAM (GPU)"); } #endif } // Update vertex data on GPU (upload new data to one buffer) void rlUpdateMesh(Mesh mesh, int buffer, int numVertex) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Activate mesh VAO if (vaoSupported) glBindVertexArray(mesh.vaoId); switch (buffer) { case 0: // Update vertices (vertex position) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[0]); if (numVertex >= mesh.vertexCount) glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*numVertex, mesh.vertices, GL_DYNAMIC_DRAW); else glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*3*numVertex, mesh.vertices); } break; case 1: // Update texcoords (vertex texture coordinates) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[1]); if (numVertex >= mesh.vertexCount) glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*numVertex, mesh.texcoords, GL_DYNAMIC_DRAW); else glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*2*numVertex, mesh.texcoords); } break; case 2: // Update normals (vertex normals) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[2]); if (numVertex >= mesh.vertexCount) glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*numVertex, mesh.normals, GL_DYNAMIC_DRAW); else glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*3*numVertex, mesh.normals); } break; case 3: // Update colors (vertex colors) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[3]); if (numVertex >= mesh.vertexCount) glBufferData(GL_ARRAY_BUFFER, sizeof(float)*4*numVertex, mesh.colors, GL_DYNAMIC_DRAW); else glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(unsigned char)*4*numVertex, mesh.colors); } break; case 4: // Update tangents (vertex tangents) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[4]); if (numVertex >= mesh.vertexCount) glBufferData(GL_ARRAY_BUFFER, sizeof(float)*4*numVertex, mesh.tangents, GL_DYNAMIC_DRAW); else glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*4*numVertex, mesh.tangents); } break; case 5: // Update texcoords2 (vertex second texture coordinates) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[5]); if (numVertex >= mesh.vertexCount) glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*numVertex, mesh.texcoords2, GL_DYNAMIC_DRAW); else glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*2*numVertex, mesh.texcoords2); } break; default: break; } // Unbind the current VAO if (vaoSupported) glBindVertexArray(0); // Another option would be using buffer mapping... //mesh.vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE); // Now we can modify vertices //glUnmapBuffer(GL_ARRAY_BUFFER); #endif } // Draw a 3d mesh with material and transform void rlDrawMesh(Mesh mesh, Material material, Matrix transform) { #if defined(GRAPHICS_API_OPENGL_11) glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, material.maps[MAP_DIFFUSE].texture.id); // NOTE: On OpenGL 1.1 we use Vertex Arrays to draw model glEnableClientState(GL_VERTEX_ARRAY); // Enable vertex array glEnableClientState(GL_TEXTURE_COORD_ARRAY); // Enable texture coords array if (mesh.normals != NULL) glEnableClientState(GL_NORMAL_ARRAY); // Enable normals array if (mesh.colors != NULL) glEnableClientState(GL_COLOR_ARRAY); // Enable colors array glVertexPointer(3, GL_FLOAT, 0, mesh.vertices); // Pointer to vertex coords array glTexCoordPointer(2, GL_FLOAT, 0, mesh.texcoords); // Pointer to texture coords array if (mesh.normals != NULL) glNormalPointer(GL_FLOAT, 0, mesh.normals); // Pointer to normals array if (mesh.colors != NULL) glColorPointer(4, GL_UNSIGNED_BYTE, 0, mesh.colors); // Pointer to colors array rlPushMatrix(); rlMultMatrixf(MatrixToFloat(transform)); rlColor4ub(material.maps[MAP_DIFFUSE].color.r, material.maps[MAP_DIFFUSE].color.g, material.maps[MAP_DIFFUSE].color.b, material.maps[MAP_DIFFUSE].color.a); if (mesh.indices != NULL) glDrawElements(GL_TRIANGLES, mesh.triangleCount*3, GL_UNSIGNED_SHORT, mesh.indices); else glDrawArrays(GL_TRIANGLES, 0, mesh.vertexCount); rlPopMatrix(); glDisableClientState(GL_VERTEX_ARRAY); // Disable vertex array glDisableClientState(GL_TEXTURE_COORD_ARRAY); // Disable texture coords array if (mesh.normals != NULL) glDisableClientState(GL_NORMAL_ARRAY); // Disable normals array if (mesh.colors != NULL) glDisableClientState(GL_NORMAL_ARRAY); // Disable colors array glDisable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, 0); #endif #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Bind shader program glUseProgram(material.shader.id); // Matrices and other values required by shader //----------------------------------------------------- // Calculate and send to shader model matrix (used by PBR shader) if (material.shader.locs[LOC_MATRIX_MODEL] != -1) SetShaderValueMatrix(material.shader, material.shader.locs[LOC_MATRIX_MODEL], transform); // Upload to shader material.colDiffuse if (material.shader.locs[LOC_COLOR_DIFFUSE] != -1) glUniform4f(material.shader.locs[LOC_COLOR_DIFFUSE], (float)material.maps[MAP_DIFFUSE].color.r/255.0f, (float)material.maps[MAP_DIFFUSE].color.g/255.0f, (float)material.maps[MAP_DIFFUSE].color.b/255.0f, (float)material.maps[MAP_DIFFUSE].color.a/255.0f); // Upload to shader material.colSpecular (if available) if (material.shader.locs[LOC_COLOR_SPECULAR] != -1) glUniform4f(material.shader.locs[LOC_COLOR_SPECULAR], (float)material.maps[MAP_SPECULAR].color.r/255.0f, (float)material.maps[MAP_SPECULAR].color.g/255.0f, (float)material.maps[MAP_SPECULAR].color.b/255.0f, (float)material.maps[MAP_SPECULAR].color.a/255.0f); if (material.shader.locs[LOC_MATRIX_VIEW] != -1) SetShaderValueMatrix(material.shader, material.shader.locs[LOC_MATRIX_VIEW], modelview); if (material.shader.locs[LOC_MATRIX_PROJECTION] != -1) SetShaderValueMatrix(material.shader, material.shader.locs[LOC_MATRIX_PROJECTION], projection); // At this point the modelview matrix just contains the view matrix (camera) // That's because BeginMode3D() sets it an no model-drawing function modifies it, all use rlPushMatrix() and rlPopMatrix() Matrix matView = modelview; // View matrix (camera) Matrix matProjection = projection; // Projection matrix (perspective) // Calculate model-view matrix combining matModel and matView Matrix matModelView = MatrixMultiply(transform, matView); // Transform to camera-space coordinates //----------------------------------------------------- // Bind active texture maps (if available) for (int i = 0; i < MAX_MATERIAL_MAPS; i++) { if (material.maps[i].texture.id > 0) { glActiveTexture(GL_TEXTURE0 + i); if ((i == MAP_IRRADIANCE) || (i == MAP_PREFILTER) || (i == MAP_CUBEMAP)) glBindTexture(GL_TEXTURE_CUBE_MAP, material.maps[i].texture.id); else glBindTexture(GL_TEXTURE_2D, material.maps[i].texture.id); glUniform1i(material.shader.locs[LOC_MAP_DIFFUSE + i], i); } } // Bind vertex array objects (or VBOs) if (vaoSupported) glBindVertexArray(mesh.vaoId); else { // TODO: Simplify VBO binding into a for loop // Bind mesh VBO data: vertex position (shader-location = 0) glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[0]); glVertexAttribPointer(material.shader.locs[LOC_VERTEX_POSITION], 3, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(material.shader.locs[LOC_VERTEX_POSITION]); // Bind mesh VBO data: vertex texcoords (shader-location = 1) glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[1]); glVertexAttribPointer(material.shader.locs[LOC_VERTEX_TEXCOORD01], 2, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(material.shader.locs[LOC_VERTEX_TEXCOORD01]); // Bind mesh VBO data: vertex normals (shader-location = 2, if available) if (material.shader.locs[LOC_VERTEX_NORMAL] != -1) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[2]); glVertexAttribPointer(material.shader.locs[LOC_VERTEX_NORMAL], 3, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(material.shader.locs[LOC_VERTEX_NORMAL]); } // Bind mesh VBO data: vertex colors (shader-location = 3, if available) if (material.shader.locs[LOC_VERTEX_COLOR] != -1) { if (mesh.vboId[3] != 0) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[3]); glVertexAttribPointer(material.shader.locs[LOC_VERTEX_COLOR], 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0); glEnableVertexAttribArray(material.shader.locs[LOC_VERTEX_COLOR]); } else { // Set default value for unused attribute // NOTE: Required when using default shader and no VAO support glVertexAttrib4f(material.shader.locs[LOC_VERTEX_COLOR], 1.0f, 1.0f, 1.0f, 1.0f); glDisableVertexAttribArray(material.shader.locs[LOC_VERTEX_COLOR]); } } // Bind mesh VBO data: vertex tangents (shader-location = 4, if available) if (material.shader.locs[LOC_VERTEX_TANGENT] != -1) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[4]); glVertexAttribPointer(material.shader.locs[LOC_VERTEX_TANGENT], 4, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(material.shader.locs[LOC_VERTEX_TANGENT]); } // Bind mesh VBO data: vertex texcoords2 (shader-location = 5, if available) if (material.shader.locs[LOC_VERTEX_TEXCOORD02] != -1) { glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[5]); glVertexAttribPointer(material.shader.locs[LOC_VERTEX_TEXCOORD02], 2, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(material.shader.locs[LOC_VERTEX_TEXCOORD02]); } if (mesh.indices != NULL) glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.vboId[6]); } int eyesCount = 1; #if defined(SUPPORT_VR_SIMULATOR) if (vrStereoRender) eyesCount = 2; #endif for (int eye = 0; eye < eyesCount; eye++) { if (eyesCount == 1) modelview = matModelView; #if defined(SUPPORT_VR_SIMULATOR) else SetStereoView(eye, matProjection, matModelView); #endif // Calculate model-view-projection matrix (MVP) Matrix matMVP = MatrixMultiply(modelview, projection); // Transform to screen-space coordinates // Send combined model-view-projection matrix to shader glUniformMatrix4fv(material.shader.locs[LOC_MATRIX_MVP], 1, false, MatrixToFloat(matMVP)); // Draw call! if (mesh.indices != NULL) glDrawElements(GL_TRIANGLES, mesh.triangleCount*3, GL_UNSIGNED_SHORT, 0); // Indexed vertices draw else glDrawArrays(GL_TRIANGLES, 0, mesh.vertexCount); } // Unbind all binded texture maps for (int i = 0; i < MAX_MATERIAL_MAPS; i++) { glActiveTexture(GL_TEXTURE0 + i); // Set shader active texture if ((i == MAP_IRRADIANCE) || (i == MAP_PREFILTER) || (i == MAP_CUBEMAP)) glBindTexture(GL_TEXTURE_CUBE_MAP, 0); else glBindTexture(GL_TEXTURE_2D, 0); // Unbind current active texture } // Unind vertex array objects (or VBOs) if (vaoSupported) glBindVertexArray(0); else { glBindBuffer(GL_ARRAY_BUFFER, 0); if (mesh.indices != NULL) glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); } // Unbind shader program glUseProgram(0); // Restore projection/modelview matrices // NOTE: In stereo rendering matrices are being modified to fit every eye projection = matProjection; modelview = matView; #endif } // Unload mesh data from CPU and GPU void rlUnloadMesh(Mesh *mesh) { if (mesh->vertices != NULL) free(mesh->vertices); if (mesh->texcoords != NULL) free(mesh->texcoords); if (mesh->normals != NULL) free(mesh->normals); if (mesh->colors != NULL) free(mesh->colors); if (mesh->tangents != NULL) free(mesh->tangents); if (mesh->texcoords2 != NULL) free(mesh->texcoords2); if (mesh->indices != NULL) free(mesh->indices); if (mesh->baseVertices != NULL) free(mesh->baseVertices); if (mesh->baseNormals != NULL) free(mesh->baseNormals); if (mesh->weightBias != NULL) free(mesh->weightBias); if (mesh->weightId != NULL) free(mesh->weightId); rlDeleteBuffers(mesh->vboId[0]); // vertex rlDeleteBuffers(mesh->vboId[1]); // texcoords rlDeleteBuffers(mesh->vboId[2]); // normals rlDeleteBuffers(mesh->vboId[3]); // colors rlDeleteBuffers(mesh->vboId[4]); // tangents rlDeleteBuffers(mesh->vboId[5]); // texcoords2 rlDeleteBuffers(mesh->vboId[6]); // indices rlDeleteVertexArrays(mesh->vaoId); } // Read screen pixel data (color buffer) unsigned char *rlReadScreenPixels(int width, int height) { unsigned char *screenData = (unsigned char *)calloc(width*height*4, sizeof(unsigned char)); // NOTE 1: glReadPixels returns image flipped vertically -> (0,0) is the bottom left corner of the framebuffer // NOTE 2: We are getting alpha channel! Be careful, it can be transparent if not cleared properly! glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, screenData); // Flip image vertically! unsigned char *imgData = (unsigned char *)malloc(width*height*sizeof(unsigned char)*4); for (int y = height - 1; y >= 0; y--) { for (int x = 0; x < (width*4); x++) { imgData[((height - 1) - y)*width*4 + x] = screenData[(y*width*4) + x]; // Flip line // Set alpha component value to 255 (no trasparent image retrieval) // NOTE: Alpha value has already been applied to RGB in framebuffer, we don't need it! if (((x + 1)%4) == 0) imgData[((height - 1) - y)*width*4 + x] = 255; } } free(screenData); return imgData; // NOTE: image data should be freed } // Read texture pixel data void *rlReadTexturePixels(Texture2D texture) { void *pixels = NULL; #if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33) glBindTexture(GL_TEXTURE_2D, texture.id); // NOTE: Using texture.id, we can retrieve some texture info (but not on OpenGL ES 2.0) // Possible texture info: GL_TEXTURE_RED_SIZE, GL_TEXTURE_GREEN_SIZE, GL_TEXTURE_BLUE_SIZE, GL_TEXTURE_ALPHA_SIZE //int width, height, format; //glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width); //glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height); //glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &format); // NOTE: Each row written to or read from by OpenGL pixel operations like glGetTexImage are aligned to a 4 byte boundary by default, which may add some padding. // Use glPixelStorei to modify padding with the GL_[UN]PACK_ALIGNMENT setting. // GL_PACK_ALIGNMENT affects operations that read from OpenGL memory (glReadPixels, glGetTexImage, etc.) // GL_UNPACK_ALIGNMENT affects operations that write to OpenGL memory (glTexImage, etc.) glPixelStorei(GL_PACK_ALIGNMENT, 1); unsigned int glInternalFormat, glFormat, glType; rlGetGlTextureFormats(texture.format, &glInternalFormat, &glFormat, &glType); unsigned int size = GetPixelDataSize(texture.width, texture.height, texture.format); if ((glInternalFormat != -1) && (texture.format < COMPRESSED_DXT1_RGB)) { pixels = (unsigned char *)malloc(size); glGetTexImage(GL_TEXTURE_2D, 0, glFormat, glType, pixels); } else TraceLog(LOG_WARNING, "Texture data retrieval not suported for pixel format"); glBindTexture(GL_TEXTURE_2D, 0); #endif #if defined(GRAPHICS_API_OPENGL_ES2) // glGetTexImage() is not available on OpenGL ES 2.0 // Texture2D width and height are required on OpenGL ES 2.0. There is no way to get it from texture id. // Two possible Options: // 1 - Bind texture to color fbo attachment and glReadPixels() // 2 - Create an fbo, activate it, render quad with texture, glReadPixels() // We are using Option 1, just need to care for texture format on retrieval // NOTE: This behaviour could be conditioned by graphic driver... RenderTexture2D fbo = rlLoadRenderTexture(texture.width, texture.height); glBindFramebuffer(GL_FRAMEBUFFER, fbo.id); glBindTexture(GL_TEXTURE_2D, 0); // Attach our texture to FBO // NOTE: Previoust attached texture is automatically detached glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture.id, 0); // Allocate enough memory to read back our texture data pixels = (unsigned char *)malloc(GetPixelDataSize(texture.width, texture.height, texture.format)); // Get OpenGL internal formats and data type from our texture format unsigned int glInternalFormat, glFormat, glType; rlGetGlTextureFormats(texture.format, &glInternalFormat, &glFormat, &glType); // NOTE: We read data as RGBA because FBO texture is configured as RGBA, despite binding a RGB texture... glReadPixels(0, 0, texture.width, texture.height, glFormat, glType, pixels); // Re-attach internal FBO color texture before deleting it glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fbo.texture.id, 0); glBindFramebuffer(GL_FRAMEBUFFER, 0); // Clean up temporal fbo rlDeleteRenderTextures(fbo); #endif return pixels; } //---------------------------------------------------------------------------------- // Module Functions Definition - Shaders Functions // NOTE: Those functions are exposed directly to the user in raylib.h //---------------------------------------------------------------------------------- // Get default internal texture (white texture) Texture2D GetTextureDefault(void) { Texture2D texture = { 0 }; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) texture.id = defaultTextureId; texture.width = 1; texture.height = 1; texture.mipmaps = 1; texture.format = UNCOMPRESSED_R8G8B8A8; #endif return texture; } // Get default shader Shader GetShaderDefault(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) return defaultShader; #else Shader shader = { 0 }; return shader; #endif } // Load text data from file // NOTE: text chars array should be freed manually char *LoadText(const char *fileName) { FILE *textFile = NULL; char *text = NULL; if (fileName != NULL) { textFile = fopen(fileName,"rt"); if (textFile != NULL) { fseek(textFile, 0, SEEK_END); int size = ftell(textFile); fseek(textFile, 0, SEEK_SET); if (size > 0) { text = (char *)malloc(sizeof(char)*(size + 1)); int count = fread(text, sizeof(char), size, textFile); text[count] = '\0'; } fclose(textFile); } else TraceLog(LOG_WARNING, "[%s] Text file could not be opened", fileName); } return text; } // Load shader from files and bind default locations // NOTE: If shader string is NULL, using default vertex/fragment shaders Shader LoadShader(const char *vsFileName, const char *fsFileName) { Shader shader = { 0 }; char *vShaderStr = NULL; char *fShaderStr = NULL; if (vsFileName != NULL) vShaderStr = LoadText(vsFileName); if (fsFileName != NULL) fShaderStr = LoadText(fsFileName); shader = LoadShaderCode(vShaderStr, fShaderStr); if (vShaderStr != NULL) free(vShaderStr); if (fShaderStr != NULL) free(fShaderStr); return shader; } // Load shader from code strings // NOTE: If shader string is NULL, using default vertex/fragment shaders Shader LoadShaderCode(char *vsCode, char *fsCode) { Shader shader = { 0 }; // NOTE: All locations must be reseted to -1 (no location) for (int i = 0; i < MAX_SHADER_LOCATIONS; i++) shader.locs[i] = -1; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) unsigned int vertexShaderId = defaultVShaderId; unsigned int fragmentShaderId = defaultFShaderId; if (vsCode != NULL) vertexShaderId = CompileShader(vsCode, GL_VERTEX_SHADER); if (fsCode != NULL) fragmentShaderId = CompileShader(fsCode, GL_FRAGMENT_SHADER); if ((vertexShaderId == defaultVShaderId) && (fragmentShaderId == defaultFShaderId)) shader = defaultShader; else { shader.id = LoadShaderProgram(vertexShaderId, fragmentShaderId); if (vertexShaderId != defaultVShaderId) glDeleteShader(vertexShaderId); if (fragmentShaderId != defaultFShaderId) glDeleteShader(fragmentShaderId); if (shader.id == 0) { TraceLog(LOG_WARNING, "Custom shader could not be loaded"); shader = defaultShader; } // After shader loading, we TRY to set default location names if (shader.id > 0) SetShaderDefaultLocations(&shader); } // Get available shader uniforms // NOTE: This information is useful for debug... int uniformCount = -1; glGetProgramiv(shader.id, GL_ACTIVE_UNIFORMS, &uniformCount); for(int i = 0; i < uniformCount; i++) { int namelen = -1; int num = -1; char name[256]; // Assume no variable names longer than 256 GLenum type = GL_ZERO; // Get the name of the uniforms glGetActiveUniform(shader.id, i,sizeof(name) - 1, &namelen, &num, &type, name); name[namelen] = 0; // Get the location of the named uniform GLuint location = glGetUniformLocation(shader.id, name); TraceLog(LOG_DEBUG, "[SHDR ID %i] Active uniform [%s] set at location: %i", shader.id, name, location); } #endif return shader; } // Unload shader from GPU memory (VRAM) void UnloadShader(Shader shader) { if (shader.id > 0) { rlDeleteShader(shader.id); TraceLog(LOG_INFO, "[SHDR ID %i] Unloaded shader program data", shader.id); } } // Begin custom shader mode void BeginShaderMode(Shader shader) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (currentShader.id != shader.id) { rlglDraw(); currentShader = shader; } #endif } // End custom shader mode (returns to default shader) void EndShaderMode(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) BeginShaderMode(defaultShader); #endif } // Get shader uniform location int GetShaderLocation(Shader shader, const char *uniformName) { int location = -1; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) location = glGetUniformLocation(shader.id, uniformName); if (location == -1) TraceLog(LOG_WARNING, "[SHDR ID %i][%s] Shader uniform could not be found", shader.id, uniformName); else TraceLog(LOG_INFO, "[SHDR ID %i][%s] Shader uniform set at location: %i", shader.id, uniformName, location); #endif return location; } // Set shader uniform value void SetShaderValue(Shader shader, int uniformLoc, const void *value, int uniformType) { SetShaderValueV(shader, uniformLoc, value, uniformType, 1); } // Set shader uniform value vector void SetShaderValueV(Shader shader, int uniformLoc, const void *value, int uniformType, int count) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) glUseProgram(shader.id); switch (uniformType) { case UNIFORM_FLOAT: glUniform1fv(uniformLoc, count, (float *)value); break; case UNIFORM_VEC2: glUniform2fv(uniformLoc, count, (float *)value); break; case UNIFORM_VEC3: glUniform3fv(uniformLoc, count, (float *)value); break; case UNIFORM_VEC4: glUniform4fv(uniformLoc, count, (float *)value); break; case UNIFORM_INT: glUniform1iv(uniformLoc, count, (int *)value); break; case UNIFORM_IVEC2: glUniform2iv(uniformLoc, count, (int *)value); break; case UNIFORM_IVEC3: glUniform3iv(uniformLoc, count, (int *)value); break; case UNIFORM_IVEC4: glUniform4iv(uniformLoc, count, (int *)value); break; case UNIFORM_SAMPLER2D: glUniform1iv(uniformLoc, count, (int *)value); break; default: TraceLog(LOG_WARNING, "Shader uniform could not be set data type not recognized"); } //glUseProgram(0); // Avoid reseting current shader program, in case other uniforms are set #endif } // Set shader uniform value (matrix 4x4) void SetShaderValueMatrix(Shader shader, int uniformLoc, Matrix mat) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) glUseProgram(shader.id); glUniformMatrix4fv(uniformLoc, 1, false, MatrixToFloat(mat)); //glUseProgram(0); #endif } // Set a custom projection matrix (replaces internal projection matrix) void SetMatrixProjection(Matrix proj) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) projection = proj; #endif } // Set a custom modelview matrix (replaces internal modelview matrix) void SetMatrixModelview(Matrix view) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) modelview = view; #endif } // Return internal modelview matrix Matrix GetMatrixModelview() { Matrix matrix = MatrixIdentity(); #if defined(GRAPHICS_API_OPENGL_11) float mat[16]; glGetFloatv(GL_MODELVIEW_MATRIX, mat); #else matrix = modelview; #endif return matrix; } // Generate cubemap texture from HDR texture // TODO: OpenGL ES 2.0 does not support GL_RGB16F texture format, neither GL_DEPTH_COMPONENT24 Texture2D GenTextureCubemap(Shader shader, Texture2D skyHDR, int size) { Texture2D cubemap = { 0 }; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // NOTE: SetShaderDefaultLocations() already setups locations for projection and view Matrix in shader // Other locations should be setup externally in shader before calling the function // Set up depth face culling and cubemap seamless glDisable(GL_CULL_FACE); #if defined(GRAPHICS_API_OPENGL_33) glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS); // Flag not supported on OpenGL ES 2.0 #endif // Setup framebuffer unsigned int fbo, rbo; glGenFramebuffers(1, &fbo); glGenRenderbuffers(1, &rbo); glBindFramebuffer(GL_FRAMEBUFFER, fbo); glBindRenderbuffer(GL_RENDERBUFFER, rbo); #if defined(GRAPHICS_API_OPENGL_33) glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, size, size); #elif defined(GRAPHICS_API_OPENGL_ES2) glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, size, size); #endif glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbo); // Set up cubemap to render and attach to framebuffer // NOTE: Faces are stored as 32 bit floating point values glGenTextures(1, &cubemap.id); glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap.id); for (unsigned int i = 0; i < 6; i++) { #if defined(GRAPHICS_API_OPENGL_33) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB32F, size, size, 0, GL_RGB, GL_FLOAT, NULL); #elif defined(GRAPHICS_API_OPENGL_ES2) if (texFloatSupported) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, size, size, 0, GL_RGB, GL_FLOAT, NULL); #endif } glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); #if defined(GRAPHICS_API_OPENGL_33) glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); // Flag not supported on OpenGL ES 2.0 #endif glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // Create projection and different views for each face Matrix fboProjection = MatrixPerspective(90.0*DEG2RAD, 1.0, 0.01, 1000.0); Matrix fboViews[6] = { MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 1.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ -1.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 1.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, 1.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, -1.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, 1.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, -1.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }) }; // Convert HDR equirectangular environment map to cubemap equivalent glUseProgram(shader.id); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, skyHDR.id); SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_PROJECTION], fboProjection); // Note: don't forget to configure the viewport to the capture dimensions glViewport(0, 0, size, size); glBindFramebuffer(GL_FRAMEBUFFER, fbo); for (int i = 0; i < 6; i++) { SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_VIEW], fboViews[i]); glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, cubemap.id, 0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); GenDrawCube(); } // Unbind framebuffer and textures glBindFramebuffer(GL_FRAMEBUFFER, 0); // Reset viewport dimensions to default glViewport(0, 0, screenWidth, screenHeight); //glEnable(GL_CULL_FACE); // NOTE: Texture2D is a GL_TEXTURE_CUBE_MAP, not a GL_TEXTURE_2D! cubemap.width = size; cubemap.height = size; cubemap.mipmaps = 1; cubemap.format = UNCOMPRESSED_R32G32B32; #endif return cubemap; } // Generate irradiance texture using cubemap data // TODO: OpenGL ES 2.0 does not support GL_RGB16F texture format, neither GL_DEPTH_COMPONENT24 Texture2D GenTextureIrradiance(Shader shader, Texture2D cubemap, int size) { Texture2D irradiance = { 0 }; #if defined(GRAPHICS_API_OPENGL_33) // || defined(GRAPHICS_API_OPENGL_ES2) // NOTE: SetShaderDefaultLocations() already setups locations for projection and view Matrix in shader // Other locations should be setup externally in shader before calling the function // Setup framebuffer unsigned int fbo, rbo; glGenFramebuffers(1, &fbo); glGenRenderbuffers(1, &rbo); glBindFramebuffer(GL_FRAMEBUFFER, fbo); glBindRenderbuffer(GL_RENDERBUFFER, rbo); glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, size, size); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbo); // Create an irradiance cubemap, and re-scale capture FBO to irradiance scale glGenTextures(1, &irradiance.id); glBindTexture(GL_TEXTURE_CUBE_MAP, irradiance.id); for (unsigned int i = 0; i < 6; i++) { glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB16F, size, size, 0, GL_RGB, GL_FLOAT, NULL); } glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // Create projection (transposed) and different views for each face Matrix fboProjection = MatrixPerspective(90.0*DEG2RAD, 1.0, 0.01, 1000.0); Matrix fboViews[6] = { MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 1.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ -1.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 1.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, 1.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, -1.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, 1.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, -1.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }) }; // Solve diffuse integral by convolution to create an irradiance cubemap glUseProgram(shader.id); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap.id); SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_PROJECTION], fboProjection); // Note: don't forget to configure the viewport to the capture dimensions glViewport(0, 0, size, size); glBindFramebuffer(GL_FRAMEBUFFER, fbo); for (int i = 0; i < 6; i++) { SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_VIEW], fboViews[i]); glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, irradiance.id, 0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); GenDrawCube(); } // Unbind framebuffer and textures glBindFramebuffer(GL_FRAMEBUFFER, 0); // Reset viewport dimensions to default glViewport(0, 0, screenWidth, screenHeight); irradiance.width = size; irradiance.height = size; irradiance.mipmaps = 1; //irradiance.format = UNCOMPRESSED_R16G16B16; #endif return irradiance; } // Generate prefilter texture using cubemap data // TODO: OpenGL ES 2.0 does not support GL_RGB16F texture format, neither GL_DEPTH_COMPONENT24 Texture2D GenTexturePrefilter(Shader shader, Texture2D cubemap, int size) { Texture2D prefilter = { 0 }; #if defined(GRAPHICS_API_OPENGL_33) // || defined(GRAPHICS_API_OPENGL_ES2) // NOTE: SetShaderDefaultLocations() already setups locations for projection and view Matrix in shader // Other locations should be setup externally in shader before calling the function // TODO: Locations should be taken out of this function... too shader dependant... int roughnessLoc = GetShaderLocation(shader, "roughness"); // Setup framebuffer unsigned int fbo, rbo; glGenFramebuffers(1, &fbo); glGenRenderbuffers(1, &rbo); glBindFramebuffer(GL_FRAMEBUFFER, fbo); glBindRenderbuffer(GL_RENDERBUFFER, rbo); glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, size, size); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbo); // Create a prefiltered HDR environment map glGenTextures(1, &prefilter.id); glBindTexture(GL_TEXTURE_CUBE_MAP, prefilter.id); for (unsigned int i = 0; i < 6; i++) { glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB16F, size, size, 0, GL_RGB, GL_FLOAT, NULL); } glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // Generate mipmaps for the prefiltered HDR texture glGenerateMipmap(GL_TEXTURE_CUBE_MAP); // Create projection (transposed) and different views for each face Matrix fboProjection = MatrixPerspective(90.0*DEG2RAD, 1.0, 0.01, 1000.0); Matrix fboViews[6] = { MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 1.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ -1.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 1.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, 1.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, -1.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, 1.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }), MatrixLookAt((Vector3){ 0.0f, 0.0f, 0.0f }, (Vector3){ 0.0f, 0.0f, -1.0f }, (Vector3){ 0.0f, -1.0f, 0.0f }) }; // Prefilter HDR and store data into mipmap levels glUseProgram(shader.id); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap.id); SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_PROJECTION], fboProjection); glBindFramebuffer(GL_FRAMEBUFFER, fbo); #define MAX_MIPMAP_LEVELS 5 // Max number of prefilter texture mipmaps for (int mip = 0; mip < MAX_MIPMAP_LEVELS; mip++) { // Resize framebuffer according to mip-level size. unsigned int mipWidth = size*(int)powf(0.5f, (float)mip); unsigned int mipHeight = size*(int)powf(0.5f, (float)mip); glBindRenderbuffer(GL_RENDERBUFFER, rbo); glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, mipWidth, mipHeight); glViewport(0, 0, mipWidth, mipHeight); float roughness = (float)mip/(float)(MAX_MIPMAP_LEVELS - 1); glUniform1f(roughnessLoc, roughness); for (int i = 0; i < 6; i++) { SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_VIEW], fboViews[i]); glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, prefilter.id, mip); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); GenDrawCube(); } } // Unbind framebuffer and textures glBindFramebuffer(GL_FRAMEBUFFER, 0); // Reset viewport dimensions to default glViewport(0, 0, screenWidth, screenHeight); prefilter.width = size; prefilter.height = size; //prefilter.mipmaps = 1 + (int)floor(log(size)/log(2)); //prefilter.format = UNCOMPRESSED_R16G16B16; #endif return prefilter; } // Generate BRDF texture using cubemap data // NOTE: OpenGL ES 2.0 does not support GL_RGB16F texture format, neither GL_DEPTH_COMPONENT24 // TODO: Review implementation: https://github.com/HectorMF/BRDFGenerator Texture2D GenTextureBRDF(Shader shader, int size) { Texture2D brdf = { 0 }; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Generate BRDF convolution texture glGenTextures(1, &brdf.id); glBindTexture(GL_TEXTURE_2D, brdf.id); #if defined(GRAPHICS_API_OPENGL_33) glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, size, size, 0, GL_RGB, GL_FLOAT, NULL); #elif defined(GRAPHICS_API_OPENGL_ES2) if (texFloatSupported) glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, size, size, 0, GL_RGB, GL_FLOAT, NULL); #endif glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // Render BRDF LUT into a quad using FBO unsigned int fbo, rbo; glGenFramebuffers(1, &fbo); glGenRenderbuffers(1, &rbo); glBindFramebuffer(GL_FRAMEBUFFER, fbo); glBindRenderbuffer(GL_RENDERBUFFER, rbo); #if defined(GRAPHICS_API_OPENGL_33) glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, size, size); #elif defined(GRAPHICS_API_OPENGL_ES2) glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, size, size); #endif glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, brdf.id, 0); glViewport(0, 0, size, size); glUseProgram(shader.id); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); GenDrawQuad(); // Unbind framebuffer and textures glBindFramebuffer(GL_FRAMEBUFFER, 0); // Unload framebuffer but keep color texture glDeleteRenderbuffers(1, &rbo); glDeleteFramebuffers(1, &fbo); // Reset viewport dimensions to default glViewport(0, 0, screenWidth, screenHeight); brdf.width = size; brdf.height = size; brdf.mipmaps = 1; brdf.format = UNCOMPRESSED_R32G32B32; #endif return brdf; } // Begin blending mode (alpha, additive, multiplied) // NOTE: Only 3 blending modes supported, default blend mode is alpha void BeginBlendMode(int mode) { if ((blendMode != mode) && (mode < 3)) { rlglDraw(); switch (mode) { case BLEND_ALPHA: glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); break; case BLEND_ADDITIVE: glBlendFunc(GL_SRC_ALPHA, GL_ONE); break; // Alternative: glBlendFunc(GL_ONE, GL_ONE); case BLEND_MULTIPLIED: glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA); break; default: break; } blendMode = mode; } } // End blending mode (reset to default: alpha blending) void EndBlendMode(void) { BeginBlendMode(BLEND_ALPHA); } // Begin scissor mode (define screen area for following drawing) // NOTE: Scissor rec refers to bottom-left corner, we change it to upper-left void BeginScissorMode(int x, int y, int width, int height) { rlglDraw(); // Force drawing elements glEnable(GL_SCISSOR_TEST); glScissor(x, screenHeight - (y + height), width, height); } // End scissor mode void EndScissorMode(void) { rlglDraw(); // Force drawing elements glDisable(GL_SCISSOR_TEST); } #if defined(SUPPORT_VR_SIMULATOR) // Get VR device information for some standard devices VrDeviceInfo GetVrDeviceInfo(int vrDeviceType) { VrDeviceInfo hmd = { 0 }; // Current VR device info switch (vrDeviceType) { case HMD_DEFAULT_DEVICE: case HMD_OCULUS_RIFT_CV1: { // Oculus Rift CV1 parameters // NOTE: CV1 represents a complete HMD redesign compared to previous versions, // new Fresnel-hybrid-asymmetric lenses have been added and, consequently, // previous parameters (DK2) and distortion shader (DK2) doesn't work any more. // I just defined a set of parameters for simulator that approximate to CV1 stereo rendering // but result is not the same obtained with Oculus PC SDK. hmd.hResolution = 2160; // HMD horizontal resolution in pixels hmd.vResolution = 1200; // HMD vertical resolution in pixels hmd.hScreenSize = 0.133793f; // HMD horizontal size in meters hmd.vScreenSize = 0.0669f; // HMD vertical size in meters hmd.vScreenCenter = 0.04678f; // HMD screen center in meters hmd.eyeToScreenDistance = 0.041f; // HMD distance between eye and display in meters hmd.lensSeparationDistance = 0.07f; // HMD lens separation distance in meters hmd.interpupillaryDistance = 0.07f; // HMD IPD (distance between pupils) in meters hmd.lensDistortionValues[0] = 1.0f; // HMD lens distortion constant parameter 0 hmd.lensDistortionValues[1] = 0.22f; // HMD lens distortion constant parameter 1 hmd.lensDistortionValues[2] = 0.24f; // HMD lens distortion constant parameter 2 hmd.lensDistortionValues[3] = 0.0f; // HMD lens distortion constant parameter 3 hmd.chromaAbCorrection[0] = 0.996f; // HMD chromatic aberration correction parameter 0 hmd.chromaAbCorrection[1] = -0.004f; // HMD chromatic aberration correction parameter 1 hmd.chromaAbCorrection[2] = 1.014f; // HMD chromatic aberration correction parameter 2 hmd.chromaAbCorrection[3] = 0.0f; // HMD chromatic aberration correction parameter 3 TraceLog(LOG_INFO, "Initializing VR Simulator (Oculus Rift CV1)"); } break; case HMD_OCULUS_RIFT_DK2: { // Oculus Rift DK2 parameters hmd.hResolution = 1280; // HMD horizontal resolution in pixels hmd.vResolution = 800; // HMD vertical resolution in pixels hmd.hScreenSize = 0.14976f; // HMD horizontal size in meters hmd.vScreenSize = 0.09356f; // HMD vertical size in meters hmd.vScreenCenter = 0.04678f; // HMD screen center in meters hmd.eyeToScreenDistance = 0.041f; // HMD distance between eye and display in meters hmd.lensSeparationDistance = 0.0635f; // HMD lens separation distance in meters hmd.interpupillaryDistance = 0.064f; // HMD IPD (distance between pupils) in meters hmd.lensDistortionValues[0] = 1.0f; // HMD lens distortion constant parameter 0 hmd.lensDistortionValues[1] = 0.22f; // HMD lens distortion constant parameter 1 hmd.lensDistortionValues[2] = 0.24f; // HMD lens distortion constant parameter 2 hmd.lensDistortionValues[3] = 0.0f; // HMD lens distortion constant parameter 3 hmd.chromaAbCorrection[0] = 0.996f; // HMD chromatic aberration correction parameter 0 hmd.chromaAbCorrection[1] = -0.004f; // HMD chromatic aberration correction parameter 1 hmd.chromaAbCorrection[2] = 1.014f; // HMD chromatic aberration correction parameter 2 hmd.chromaAbCorrection[3] = 0.0f; // HMD chromatic aberration correction parameter 3 TraceLog(LOG_INFO, "Initializing VR Simulator (Oculus Rift DK2)"); } break; case HMD_OCULUS_GO: { // TODO: Provide device display and lens parameters } case HMD_VALVE_HTC_VIVE: { // TODO: Provide device display and lens parameters } case HMD_SONY_PSVR: { // TODO: Provide device display and lens parameters } default: break; } return hmd; } // Init VR simulator for selected device parameters // NOTE: It modifies the global variable: VrStereoConfig vrConfig void InitVrSimulator(VrDeviceInfo info) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Initialize framebuffer and textures for stereo rendering // NOTE: Screen size should match HMD aspect ratio vrConfig.stereoFbo = rlLoadRenderTexture(screenWidth, screenHeight); #if defined(SUPPORT_DISTORTION_SHADER) // Load distortion shader vrConfig.distortionShader = LoadShaderCode(NULL, distortionFShaderStr); if (vrConfig.distortionShader.id > 0) SetShaderDefaultLocations(&vrConfig.distortionShader); #endif // Set VR configutarion parameters, including distortion shader SetStereoConfig(info); vrSimulatorReady = true; #endif #if defined(GRAPHICS_API_OPENGL_11) TraceLog(LOG_WARNING, "VR Simulator not supported on OpenGL 1.1"); #endif } // Close VR simulator for current device void CloseVrSimulator(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (vrSimulatorReady) { rlDeleteRenderTextures(vrConfig.stereoFbo); // Unload stereo framebuffer and texture #if defined(SUPPORT_DISTORTION_SHADER) UnloadShader(vrConfig.distortionShader); // Unload distortion shader #endif } #endif } // Detect if VR simulator is running bool IsVrSimulatorReady(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) return vrSimulatorReady; #else return false; #endif } // Set VR distortion shader for stereoscopic rendering // TODO: Review VR system to be more flexible, move distortion shader to user side void SetVrDistortionShader(Shader shader) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) vrConfig.distortionShader = shader; //SetStereoConfig(info); // TODO: Must be reviewed to set new distortion shader uniform values... #endif } // Enable/Disable VR experience (device or simulator) void ToggleVrMode(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) vrSimulatorReady = !vrSimulatorReady; if (!vrSimulatorReady) { vrStereoRender = false; // Reset viewport and default projection-modelview matrices rlViewport(0, 0, screenWidth, screenHeight); projection = MatrixOrtho(0.0, screenWidth, screenHeight, 0.0, 0.0, 1.0); modelview = MatrixIdentity(); } else vrStereoRender = true; #endif } // Update VR tracking (position and orientation) and camera // NOTE: Camera (position, target, up) gets update with head tracking information void UpdateVrTracking(Camera *camera) { // TODO: Simulate 1st person camera system } // Begin Oculus drawing configuration void BeginVrDrawing(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (vrSimulatorReady) { // Setup framebuffer for stereo rendering rlEnableRenderTexture(vrConfig.stereoFbo.id); // NOTE: If your application is configured to treat the texture as a linear format (e.g. GL_RGBA) // and performs linear-to-gamma conversion in GLSL or does not care about gamma-correction, then: // - Require OculusBuffer format to be OVR_FORMAT_R8G8B8A8_UNORM_SRGB // - Do NOT enable GL_FRAMEBUFFER_SRGB //glEnable(GL_FRAMEBUFFER_SRGB); //glViewport(0, 0, buffer.width, buffer.height); // Useful if rendering to separate framebuffers (every eye) rlClearScreenBuffers(); // Clear current framebuffer(s) vrStereoRender = true; } #endif } // End Oculus drawing process (and desktop mirror) void EndVrDrawing(void) { #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) if (vrSimulatorReady) { vrStereoRender = false; // Disable stereo render rlDisableRenderTexture(); // Unbind current framebuffer rlClearScreenBuffers(); // Clear current framebuffer // Set viewport to default framebuffer size (screen size) rlViewport(0, 0, screenWidth, screenHeight); // Let rlgl reconfigure internal matrices rlMatrixMode(RL_PROJECTION); // Enable internal projection matrix rlLoadIdentity(); // Reset internal projection matrix rlOrtho(0.0, screenWidth, screenHeight, 0.0, 0.0, 1.0); // Recalculate internal projection matrix rlMatrixMode(RL_MODELVIEW); // Enable internal modelview matrix rlLoadIdentity(); // Reset internal modelview matrix #if defined(SUPPORT_DISTORTION_SHADER) // Draw RenderTexture (stereoFbo) using distortion shader currentShader = vrConfig.distortionShader; #else currentShader = GetShaderDefault(); #endif rlEnableTexture(vrConfig.stereoFbo.texture.id); rlPushMatrix(); rlBegin(RL_QUADS); rlColor4ub(255, 255, 255, 255); rlNormal3f(0.0f, 0.0f, 1.0f); // Bottom-left corner for texture and quad rlTexCoord2f(0.0f, 1.0f); rlVertex2f(0.0f, 0.0f); // Bottom-right corner for texture and quad rlTexCoord2f(0.0f, 0.0f); rlVertex2f(0.0f, (float)vrConfig.stereoFbo.texture.height); // Top-right corner for texture and quad rlTexCoord2f(1.0f, 0.0f); rlVertex2f( (float)vrConfig.stereoFbo.texture.width, (float)vrConfig.stereoFbo.texture.height); // Top-left corner for texture and quad rlTexCoord2f(1.0f, 1.0f); rlVertex2f( (float)vrConfig.stereoFbo.texture.width, 0.0f); rlEnd(); rlPopMatrix(); rlDisableTexture(); // Update and draw render texture fbo with distortion to backbuffer UpdateBuffersDefault(); DrawBuffersDefault(); // Restore defaultShader currentShader = defaultShader; // Reset viewport and default projection-modelview matrices rlViewport(0, 0, screenWidth, screenHeight); projection = MatrixOrtho(0.0, screenWidth, screenHeight, 0.0, 0.0, 1.0); modelview = MatrixIdentity(); rlDisableDepthTest(); } #endif } #endif // SUPPORT_VR_SIMULATOR //---------------------------------------------------------------------------------- // Module specific Functions Definition //---------------------------------------------------------------------------------- #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) // Compile custom shader and return shader id static unsigned int CompileShader(const char *shaderStr, int type) { unsigned int shader = glCreateShader(type); glShaderSource(shader, 1, &shaderStr, NULL); GLint success = 0; glCompileShader(shader); glGetShaderiv(shader, GL_COMPILE_STATUS, &success); if (success != GL_TRUE) { TraceLog(LOG_WARNING, "[SHDR ID %i] Failed to compile shader...", shader); int maxLength = 0; int length; glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &maxLength); #if defined(_MSC_VER) char *log = malloc(maxLength); #else char log[maxLength]; #endif glGetShaderInfoLog(shader, maxLength, &length, log); TraceLog(LOG_INFO, "%s", log); #if defined(_MSC_VER) free(log); #endif } else TraceLog(LOG_INFO, "[SHDR ID %i] Shader compiled successfully", shader); return shader; } // Load custom shader strings and return program id static unsigned int LoadShaderProgram(unsigned int vShaderId, unsigned int fShaderId) { unsigned int program = 0; #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) GLint success = 0; program = glCreateProgram(); glAttachShader(program, vShaderId); glAttachShader(program, fShaderId); // NOTE: Default attribute shader locations must be binded before linking glBindAttribLocation(program, 0, DEFAULT_ATTRIB_POSITION_NAME); glBindAttribLocation(program, 1, DEFAULT_ATTRIB_TEXCOORD_NAME); glBindAttribLocation(program, 2, DEFAULT_ATTRIB_NORMAL_NAME); glBindAttribLocation(program, 3, DEFAULT_ATTRIB_COLOR_NAME); glBindAttribLocation(program, 4, DEFAULT_ATTRIB_TANGENT_NAME); glBindAttribLocation(program, 5, DEFAULT_ATTRIB_TEXCOORD2_NAME); // NOTE: If some attrib name is no found on the shader, it locations becomes -1 glLinkProgram(program); // NOTE: All uniform variables are intitialised to 0 when a program links glGetProgramiv(program, GL_LINK_STATUS, &success); if (success == GL_FALSE) { TraceLog(LOG_WARNING, "[SHDR ID %i] Failed to link shader program...", program); int maxLength = 0; int length; glGetProgramiv(program, GL_INFO_LOG_LENGTH, &maxLength); #if defined(_MSC_VER) char *log = malloc(maxLength); #else char log[maxLength]; #endif glGetProgramInfoLog(program, maxLength, &length, log); TraceLog(LOG_INFO, "%s", log); #if defined(_MSC_VER) free(log); #endif glDeleteProgram(program); program = 0; } else TraceLog(LOG_INFO, "[SHDR ID %i] Shader program loaded successfully", program); #endif return program; } // Load default shader (just vertex positioning and texture coloring) // NOTE: This shader program is used for internal buffers static Shader LoadShaderDefault(void) { Shader shader = { 0 }; // NOTE: All locations must be reseted to -1 (no location) for (int i = 0; i < MAX_SHADER_LOCATIONS; i++) shader.locs[i] = -1; // Vertex shader directly defined, no external file required char defaultVShaderStr[] = #if defined(GRAPHICS_API_OPENGL_21) "#version 120 \n" #elif defined(GRAPHICS_API_OPENGL_ES2) "#version 100 \n" #endif #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) "attribute vec3 vertexPosition; \n" "attribute vec2 vertexTexCoord; \n" "attribute vec4 vertexColor; \n" "varying vec2 fragTexCoord; \n" "varying vec4 fragColor; \n" #elif defined(GRAPHICS_API_OPENGL_33) "#version 330 \n" "in vec3 vertexPosition; \n" "in vec2 vertexTexCoord; \n" "in vec4 vertexColor; \n" "out vec2 fragTexCoord; \n" "out vec4 fragColor; \n" #endif "uniform mat4 mvp; \n" "void main() \n" "{ \n" " fragTexCoord = vertexTexCoord; \n" " fragColor = vertexColor; \n" " gl_Position = mvp*vec4(vertexPosition, 1.0); \n" "} \n"; // Fragment shader directly defined, no external file required char defaultFShaderStr[] = #if defined(GRAPHICS_API_OPENGL_21) "#version 120 \n" #elif defined(GRAPHICS_API_OPENGL_ES2) "#version 100 \n" "precision mediump float; \n" // precision required for OpenGL ES2 (WebGL) #endif #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) "varying vec2 fragTexCoord; \n" "varying vec4 fragColor; \n" #elif defined(GRAPHICS_API_OPENGL_33) "#version 330 \n" "in vec2 fragTexCoord; \n" "in vec4 fragColor; \n" "out vec4 finalColor; \n" #endif "uniform sampler2D texture0; \n" "uniform vec4 colDiffuse; \n" "void main() \n" "{ \n" #if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) " vec4 texelColor = texture2D(texture0, fragTexCoord); \n" // NOTE: texture2D() is deprecated on OpenGL 3.3 and ES 3.0 " gl_FragColor = texelColor*colDiffuse*fragColor; \n" #elif defined(GRAPHICS_API_OPENGL_33) " vec4 texelColor = texture(texture0, fragTexCoord); \n" " finalColor = texelColor*colDiffuse*fragColor; \n" #endif "} \n"; // NOTE: Compiled vertex/fragment shaders are kept for re-use defaultVShaderId = CompileShader(defaultVShaderStr, GL_VERTEX_SHADER); // Compile default vertex shader defaultFShaderId = CompileShader(defaultFShaderStr, GL_FRAGMENT_SHADER); // Compile default fragment shader shader.id = LoadShaderProgram(defaultVShaderId, defaultFShaderId); if (shader.id > 0) { TraceLog(LOG_INFO, "[SHDR ID %i] Default shader loaded successfully", shader.id); // Set default shader locations: attributes locations shader.locs[LOC_VERTEX_POSITION] = glGetAttribLocation(shader.id, "vertexPosition"); shader.locs[LOC_VERTEX_TEXCOORD01] = glGetAttribLocation(shader.id, "vertexTexCoord"); shader.locs[LOC_VERTEX_COLOR] = glGetAttribLocation(shader.id, "vertexColor"); // Set default shader locations: uniform locations shader.locs[LOC_MATRIX_MVP] = glGetUniformLocation(shader.id, "mvp"); shader.locs[LOC_COLOR_DIFFUSE] = glGetUniformLocation(shader.id, "colDiffuse"); shader.locs[LOC_MAP_DIFFUSE] = glGetUniformLocation(shader.id, "texture0"); // NOTE: We could also use below function but in case DEFAULT_ATTRIB_* points are // changed for external custom shaders, we just use direct bindings above //SetShaderDefaultLocations(&shader); } else TraceLog(LOG_WARNING, "[SHDR ID %i] Default shader could not be loaded", shader.id); return shader; } // Get location handlers to for shader attributes and uniforms // NOTE: If any location is not found, loc point becomes -1 static void SetShaderDefaultLocations(Shader *shader) { // NOTE: Default shader attrib locations have been fixed before linking: // vertex position location = 0 // vertex texcoord location = 1 // vertex normal location = 2 // vertex color location = 3 // vertex tangent location = 4 // vertex texcoord2 location = 5 // Get handles to GLSL input attibute locations shader->locs[LOC_VERTEX_POSITION] = glGetAttribLocation(shader->id, DEFAULT_ATTRIB_POSITION_NAME); shader->locs[LOC_VERTEX_TEXCOORD01] = glGetAttribLocation(shader->id, DEFAULT_ATTRIB_TEXCOORD_NAME); shader->locs[LOC_VERTEX_TEXCOORD02] = glGetAttribLocation(shader->id, DEFAULT_ATTRIB_TEXCOORD2_NAME); shader->locs[LOC_VERTEX_NORMAL] = glGetAttribLocation(shader->id, DEFAULT_ATTRIB_NORMAL_NAME); shader->locs[LOC_VERTEX_TANGENT] = glGetAttribLocation(shader->id, DEFAULT_ATTRIB_TANGENT_NAME); shader->locs[LOC_VERTEX_COLOR] = glGetAttribLocation(shader->id, DEFAULT_ATTRIB_COLOR_NAME); // Get handles to GLSL uniform locations (vertex shader) shader->locs[LOC_MATRIX_MVP] = glGetUniformLocation(shader->id, "mvp"); shader->locs[LOC_MATRIX_PROJECTION] = glGetUniformLocation(shader->id, "projection"); shader->locs[LOC_MATRIX_VIEW] = glGetUniformLocation(shader->id, "view"); // Get handles to GLSL uniform locations (fragment shader) shader->locs[LOC_COLOR_DIFFUSE] = glGetUniformLocation(shader->id, "colDiffuse"); shader->locs[LOC_MAP_DIFFUSE] = glGetUniformLocation(shader->id, "texture0"); shader->locs[LOC_MAP_SPECULAR] = glGetUniformLocation(shader->id, "texture1"); shader->locs[LOC_MAP_NORMAL] = glGetUniformLocation(shader->id, "texture2"); } // Unload default shader static void UnloadShaderDefault(void) { glUseProgram(0); glDetachShader(defaultShader.id, defaultVShaderId); glDetachShader(defaultShader.id, defaultFShaderId); glDeleteShader(defaultVShaderId); glDeleteShader(defaultFShaderId); glDeleteProgram(defaultShader.id); } // Load default internal buffers static void LoadBuffersDefault(void) { // Initialize CPU (RAM) arrays (vertex position, texcoord, color data and indexes) //-------------------------------------------------------------------------------------------- for (int i = 0; i < MAX_BATCH_BUFFERING; i++) { vertexData[i].vertices = (float *)malloc(sizeof(float)*3*4*MAX_BATCH_ELEMENTS); // 3 float by vertex, 4 vertex by quad vertexData[i].texcoords = (float *)malloc(sizeof(float)*2*4*MAX_BATCH_ELEMENTS); // 2 float by texcoord, 4 texcoord by quad vertexData[i].colors = (unsigned char *)malloc(sizeof(unsigned char)*4*4*MAX_BATCH_ELEMENTS); // 4 float by color, 4 colors by quad #if defined(GRAPHICS_API_OPENGL_33) vertexData[i].indices = (unsigned int *)malloc(sizeof(unsigned int)*6*MAX_BATCH_ELEMENTS); // 6 int by quad (indices) #elif defined(GRAPHICS_API_OPENGL_ES2) vertexData[i].indices = (unsigned short *)malloc(sizeof(unsigned short)*6*MAX_BATCH_ELEMENTS); // 6 int by quad (indices) #endif for (int j = 0; j < (3*4*MAX_BATCH_ELEMENTS); j++) vertexData[i].vertices[j] = 0.0f; for (int j = 0; j < (2*4*MAX_BATCH_ELEMENTS); j++) vertexData[i].texcoords[j] = 0.0f; for (int j = 0; j < (4*4*MAX_BATCH_ELEMENTS); j++) vertexData[i].colors[j] = 0; int k = 0; // Indices can be initialized right now for (int j = 0; j < (6*MAX_BATCH_ELEMENTS); j += 6) { vertexData[i].indices[j] = 4*k; vertexData[i].indices[j + 1] = 4*k + 1; vertexData[i].indices[j + 2] = 4*k + 2; vertexData[i].indices[j + 3] = 4*k; vertexData[i].indices[j + 4] = 4*k + 2; vertexData[i].indices[j + 5] = 4*k + 3; k++; } vertexData[i].vCounter = 0; vertexData[i].tcCounter = 0; vertexData[i].cCounter = 0; } TraceLog(LOG_INFO, "Internal buffers initialized successfully (CPU)"); //-------------------------------------------------------------------------------------------- // Upload to GPU (VRAM) vertex data and initialize VAOs/VBOs //-------------------------------------------------------------------------------------------- for (int i = 0; i < MAX_BATCH_BUFFERING; i++) { if (vaoSupported) { // Initialize Quads VAO glGenVertexArrays(1, &vertexData[i].vaoId); glBindVertexArray(vertexData[i].vaoId); } // Quads - Vertex buffers binding and attributes enable // Vertex position buffer (shader-location = 0) glGenBuffers(1, &vertexData[i].vboId[0]); glBindBuffer(GL_ARRAY_BUFFER, vertexData[i].vboId[0]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*4*MAX_BATCH_ELEMENTS, vertexData[i].vertices, GL_DYNAMIC_DRAW); glEnableVertexAttribArray(currentShader.locs[LOC_VERTEX_POSITION]); glVertexAttribPointer(currentShader.locs[LOC_VERTEX_POSITION], 3, GL_FLOAT, 0, 0, 0); // Vertex texcoord buffer (shader-location = 1) glGenBuffers(1, &vertexData[i].vboId[1]); glBindBuffer(GL_ARRAY_BUFFER, vertexData[i].vboId[1]); glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*4*MAX_BATCH_ELEMENTS, vertexData[i].texcoords, GL_DYNAMIC_DRAW); glEnableVertexAttribArray(currentShader.locs[LOC_VERTEX_TEXCOORD01]); glVertexAttribPointer(currentShader.locs[LOC_VERTEX_TEXCOORD01], 2, GL_FLOAT, 0, 0, 0); // Vertex color buffer (shader-location = 3) glGenBuffers(1, &vertexData[i].vboId[2]); glBindBuffer(GL_ARRAY_BUFFER, vertexData[i].vboId[2]); glBufferData(GL_ARRAY_BUFFER, sizeof(unsigned char)*4*4*MAX_BATCH_ELEMENTS, vertexData[i].colors, GL_DYNAMIC_DRAW); glEnableVertexAttribArray(currentShader.locs[LOC_VERTEX_COLOR]); glVertexAttribPointer(currentShader.locs[LOC_VERTEX_COLOR], 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0); // Fill index buffer glGenBuffers(1, &vertexData[i].vboId[3]); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vertexData[i].vboId[3]); #if defined(GRAPHICS_API_OPENGL_33) glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(int)*6*MAX_BATCH_ELEMENTS, vertexData[i].indices, GL_STATIC_DRAW); #elif defined(GRAPHICS_API_OPENGL_ES2) glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(short)*6*MAX_BATCH_ELEMENTS, vertexData[i].indices, GL_STATIC_DRAW); #endif } TraceLog(LOG_INFO, "Internal buffers uploaded successfully (GPU)"); // Unbind the current VAO if (vaoSupported) glBindVertexArray(0); //-------------------------------------------------------------------------------------------- } // Update default internal buffers (VAOs/VBOs) with vertex array data // NOTE: If there is not vertex data, buffers doesn't need to be updated (vertexCount > 0) // TODO: If no data changed on the CPU arrays --> No need to re-update GPU arrays (change flag required) static void UpdateBuffersDefault(void) { // Update vertex buffers data if (vertexData[currentBuffer].vCounter > 0) { // Activate elements VAO if (vaoSupported) glBindVertexArray(vertexData[currentBuffer].vaoId); // Vertex positions buffer glBindBuffer(GL_ARRAY_BUFFER, vertexData[currentBuffer].vboId[0]); glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*3*vertexData[currentBuffer].vCounter, vertexData[currentBuffer].vertices); //glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*4*MAX_BATCH_ELEMENTS, vertexData[currentBuffer].vertices, GL_DYNAMIC_DRAW); // Update all buffer // Texture coordinates buffer glBindBuffer(GL_ARRAY_BUFFER, vertexData[currentBuffer].vboId[1]); glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float)*2*vertexData[currentBuffer].vCounter, vertexData[currentBuffer].texcoords); //glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*4*MAX_BATCH_ELEMENTS, vertexData[currentBuffer].texcoords, GL_DYNAMIC_DRAW); // Update all buffer // Colors buffer glBindBuffer(GL_ARRAY_BUFFER, vertexData[currentBuffer].vboId[2]); glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(unsigned char)*4*vertexData[currentBuffer].vCounter, vertexData[currentBuffer].colors); //glBufferData(GL_ARRAY_BUFFER, sizeof(float)*4*4*MAX_BATCH_ELEMENTS, vertexData[currentBuffer].colors, GL_DYNAMIC_DRAW); // Update all buffer // NOTE: glMapBuffer() causes sync issue. // If GPU is working with this buffer, glMapBuffer() will wait(stall) until GPU to finish its job. // To avoid waiting (idle), you can call first glBufferData() with NULL pointer before glMapBuffer(). // If you do that, the previous data in PBO will be discarded and glMapBuffer() returns a new // allocated pointer immediately even if GPU is still working with the previous data. // Another option: map the buffer object into client's memory // Probably this code could be moved somewhere else... // vertexData[currentBuffer].vertices = (float *)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE); // if(vertexData[currentBuffer].vertices) // { // Update vertex data // } // glUnmapBuffer(GL_ARRAY_BUFFER); // Unbind the current VAO if (vaoSupported) glBindVertexArray(0); } } // Draw default internal buffers vertex data static void DrawBuffersDefault(void) { Matrix matProjection = projection; Matrix matModelView = modelview; int eyesCount = 1; #if defined(SUPPORT_VR_SIMULATOR) if (vrStereoRender) eyesCount = 2; #endif for (int eye = 0; eye < eyesCount; eye++) { #if defined(SUPPORT_VR_SIMULATOR) if (eyesCount == 2) SetStereoView(eye, matProjection, matModelView); #endif // Draw buffers if (vertexData[currentBuffer].vCounter > 0) { // Set current shader and upload current MVP matrix glUseProgram(currentShader.id); // Create modelview-projection matrix Matrix matMVP = MatrixMultiply(modelview, projection); glUniformMatrix4fv(currentShader.locs[LOC_MATRIX_MVP], 1, false, MatrixToFloat(matMVP)); glUniform4f(currentShader.locs[LOC_COLOR_DIFFUSE], 1.0f, 1.0f, 1.0f, 1.0f); glUniform1i(currentShader.locs[LOC_MAP_DIFFUSE], 0); // NOTE: Additional map textures not considered for default buffers drawing int vertexOffset = 0; if (vaoSupported) glBindVertexArray(vertexData[currentBuffer].vaoId); else { // Bind vertex attrib: position (shader-location = 0) glBindBuffer(GL_ARRAY_BUFFER, vertexData[currentBuffer].vboId[0]); glVertexAttribPointer(currentShader.locs[LOC_VERTEX_POSITION], 3, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(currentShader.locs[LOC_VERTEX_POSITION]); // Bind vertex attrib: texcoord (shader-location = 1) glBindBuffer(GL_ARRAY_BUFFER, vertexData[currentBuffer].vboId[1]); glVertexAttribPointer(currentShader.locs[LOC_VERTEX_TEXCOORD01], 2, GL_FLOAT, 0, 0, 0); glEnableVertexAttribArray(currentShader.locs[LOC_VERTEX_TEXCOORD01]); // Bind vertex attrib: color (shader-location = 3) glBindBuffer(GL_ARRAY_BUFFER, vertexData[currentBuffer].vboId[2]); glVertexAttribPointer(currentShader.locs[LOC_VERTEX_COLOR], 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0); glEnableVertexAttribArray(currentShader.locs[LOC_VERTEX_COLOR]); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vertexData[currentBuffer].vboId[3]); } glActiveTexture(GL_TEXTURE0); for (int i = 0; i < drawsCounter; i++) { glBindTexture(GL_TEXTURE_2D, draws[i].textureId); if ((draws[i].mode == RL_LINES) || (draws[i].mode == RL_TRIANGLES)) glDrawArrays(draws[i].mode, vertexOffset, draws[i].vertexCount); else { #if defined(GRAPHICS_API_OPENGL_33) // We need to define the number of indices to be processed: quadsCount*6 // NOTE: The final parameter tells the GPU the offset in bytes from the // start of the index buffer to the location of the first index to process glDrawElements(GL_TRIANGLES, draws[i].vertexCount/4*6, GL_UNSIGNED_INT, (GLvoid *)(sizeof(GLuint)*vertexOffset/4*6)); #elif defined(GRAPHICS_API_OPENGL_ES2) glDrawElements(GL_TRIANGLES, draws[i].vertexCount/4*6, GL_UNSIGNED_SHORT, (GLvoid *)(sizeof(GLushort)*vertexOffset/4*6)); #endif } vertexOffset += draws[i].vertexCount; } if (!vaoSupported) { glBindBuffer(GL_ARRAY_BUFFER, 0); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); } glBindTexture(GL_TEXTURE_2D, 0); // Unbind textures } if (vaoSupported) glBindVertexArray(0); // Unbind VAO glUseProgram(0); // Unbind shader program } // Reset vertex counters for next frame vertexData[currentBuffer].vCounter = 0; vertexData[currentBuffer].tcCounter = 0; vertexData[currentBuffer].cCounter = 0; // Reset depth for next draw currentDepth = -1.0f; // Restore projection/modelview matrices projection = matProjection; modelview = matModelView; // Reset draws array for (int i = 0; i < MAX_DRAWCALL_REGISTERED; i++) { draws[i].mode = RL_QUADS; draws[i].vertexCount = 0; draws[i].textureId = defaultTextureId; } drawsCounter = 1; // Change to next buffer in the list currentBuffer++; if (currentBuffer >= MAX_BATCH_BUFFERING) currentBuffer = 0; } // Unload default internal buffers vertex data from CPU and GPU static void UnloadBuffersDefault(void) { // Unbind everything if (vaoSupported) glBindVertexArray(0); glDisableVertexAttribArray(0); glDisableVertexAttribArray(1); glDisableVertexAttribArray(2); glDisableVertexAttribArray(3); glBindBuffer(GL_ARRAY_BUFFER, 0); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); for (int i = 0; i < MAX_BATCH_BUFFERING; i++) { // Delete VBOs from GPU (VRAM) glDeleteBuffers(1, &vertexData[i].vboId[0]); glDeleteBuffers(1, &vertexData[i].vboId[1]); glDeleteBuffers(1, &vertexData[i].vboId[2]); glDeleteBuffers(1, &vertexData[i].vboId[3]); // Delete VAOs from GPU (VRAM) if (vaoSupported) glDeleteVertexArrays(1, &vertexData[i].vaoId); // Free vertex arrays memory from CPU (RAM) free(vertexData[i].vertices); free(vertexData[i].texcoords); free(vertexData[i].colors); free(vertexData[i].indices); } } // Renders a 1x1 XY quad in NDC static void GenDrawQuad(void) { unsigned int quadVAO = 0; unsigned int quadVBO = 0; float vertices[] = { // Positions // Texture Coords -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, }; // Set up plane VAO glGenVertexArrays(1, &quadVAO); glGenBuffers(1, &quadVBO); glBindVertexArray(quadVAO); // Fill buffer glBindBuffer(GL_ARRAY_BUFFER, quadVBO); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), &vertices, GL_STATIC_DRAW); // Link vertex attributes glEnableVertexAttribArray(0); glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void *)0); glEnableVertexAttribArray(1); glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void *)(3*sizeof(float))); // Draw quad glBindVertexArray(quadVAO); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); glBindVertexArray(0); glDeleteBuffers(1, &quadVBO); glDeleteVertexArrays(1, &quadVAO); } // Renders a 1x1 3D cube in NDC static void GenDrawCube(void) { unsigned int cubeVAO = 0; unsigned int cubeVBO = 0; float vertices[] = { -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -1.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f, -1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, -1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f , 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f }; // Set up cube VAO glGenVertexArrays(1, &cubeVAO); glGenBuffers(1, &cubeVBO); // Fill buffer glBindBuffer(GL_ARRAY_BUFFER, cubeVBO); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); // Link vertex attributes glBindVertexArray(cubeVAO); glEnableVertexAttribArray(0); glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)0); glEnableVertexAttribArray(1); glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)(3*sizeof(float))); glEnableVertexAttribArray(2); glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)(6*sizeof(float))); glBindBuffer(GL_ARRAY_BUFFER, 0); glBindVertexArray(0); // Draw cube glBindVertexArray(cubeVAO); glDrawArrays(GL_TRIANGLES, 0, 36); glBindVertexArray(0); glDeleteBuffers(1, &cubeVBO); glDeleteVertexArrays(1, &cubeVAO); } #if defined(SUPPORT_VR_SIMULATOR) // Configure stereo rendering (including distortion shader) with HMD device parameters // NOTE: It modifies the global variable: VrStereoConfig vrConfig static void SetStereoConfig(VrDeviceInfo hmd) { // Compute aspect ratio float aspect = ((float)hmd.hResolution*0.5f)/(float)hmd.vResolution; // Compute lens parameters float lensShift = (hmd.hScreenSize*0.25f - hmd.lensSeparationDistance*0.5f)/hmd.hScreenSize; float leftLensCenter[2] = { 0.25f + lensShift, 0.5f }; float rightLensCenter[2] = { 0.75f - lensShift, 0.5f }; float leftScreenCenter[2] = { 0.25f, 0.5f }; float rightScreenCenter[2] = { 0.75f, 0.5f }; // Compute distortion scale parameters // NOTE: To get lens max radius, lensShift must be normalized to [-1..1] float lensRadius = (float)fabs(-1.0f - 4.0f*lensShift); float lensRadiusSq = lensRadius*lensRadius; float distortionScale = hmd.lensDistortionValues[0] + hmd.lensDistortionValues[1]*lensRadiusSq + hmd.lensDistortionValues[2]*lensRadiusSq*lensRadiusSq + hmd.lensDistortionValues[3]*lensRadiusSq*lensRadiusSq*lensRadiusSq; TraceLog(LOG_DEBUG, "VR: Distortion Scale: %f", distortionScale); float normScreenWidth = 0.5f; float normScreenHeight = 1.0f; float scaleIn[2] = { 2.0f/normScreenWidth, 2.0f/normScreenHeight/aspect }; float scale[2] = { normScreenWidth*0.5f/distortionScale, normScreenHeight*0.5f*aspect/distortionScale }; TraceLog(LOG_DEBUG, "VR: Distortion Shader: LeftLensCenter = { %f, %f }", leftLensCenter[0], leftLensCenter[1]); TraceLog(LOG_DEBUG, "VR: Distortion Shader: RightLensCenter = { %f, %f }", rightLensCenter[0], rightLensCenter[1]); TraceLog(LOG_DEBUG, "VR: Distortion Shader: Scale = { %f, %f }", scale[0], scale[1]); TraceLog(LOG_DEBUG, "VR: Distortion Shader: ScaleIn = { %f, %f }", scaleIn[0], scaleIn[1]); #if defined(SUPPORT_DISTORTION_SHADER) // Update distortion shader with lens and distortion-scale parameters SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "leftLensCenter"), leftLensCenter, UNIFORM_VEC2); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "rightLensCenter"), rightLensCenter, UNIFORM_VEC2); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "leftScreenCenter"), leftScreenCenter, UNIFORM_VEC2); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "rightScreenCenter"), rightScreenCenter, UNIFORM_VEC2); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "scale"), scale, UNIFORM_VEC2); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "scaleIn"), scaleIn, UNIFORM_VEC2); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "hmdWarpParam"), hmd.lensDistortionValues, UNIFORM_VEC4); SetShaderValue(vrConfig.distortionShader, GetShaderLocation(vrConfig.distortionShader, "chromaAbParam"), hmd.chromaAbCorrection, UNIFORM_VEC4); #endif // Fovy is normally computed with: 2*atan2(hmd.vScreenSize, 2*hmd.eyeToScreenDistance) // ...but with lens distortion it is increased (see Oculus SDK Documentation) //float fovy = 2.0f*atan2(hmd.vScreenSize*0.5f*distortionScale, hmd.eyeToScreenDistance); // Really need distortionScale? float fovy = 2.0f*(float)atan2(hmd.vScreenSize*0.5f, hmd.eyeToScreenDistance); // Compute camera projection matrices float projOffset = 4.0f*lensShift; // Scaled to projection space coordinates [-1..1] Matrix proj = MatrixPerspective(fovy, aspect, 0.01, 1000.0); vrConfig.eyesProjection[0] = MatrixMultiply(proj, MatrixTranslate(projOffset, 0.0f, 0.0f)); vrConfig.eyesProjection[1] = MatrixMultiply(proj, MatrixTranslate(-projOffset, 0.0f, 0.0f)); // Compute camera transformation matrices // NOTE: Camera movement might seem more natural if we model the head. // Our axis of rotation is the base of our head, so we might want to add // some y (base of head to eye level) and -z (center of head to eye protrusion) to the camera positions. vrConfig.eyesViewOffset[0] = MatrixTranslate(-hmd.interpupillaryDistance*0.5f, 0.075f, 0.045f); vrConfig.eyesViewOffset[1] = MatrixTranslate(hmd.interpupillaryDistance*0.5f, 0.075f, 0.045f); // Compute eyes Viewports //vrConfig.eyesViewport[0] = { 0.0f, 0.0f, (float)hmd.hResolution/2, (float)hmd.vResolution }; //vrConfig.eyesViewport[1] = { hmd.hResolution/2.0f, 0.0f, (float)hmd.hResolution/2, (float) hmd.vResolution }; } // Set internal projection and modelview matrix depending on eyes tracking data static void SetStereoView(int eye, Matrix matProjection, Matrix matModelView) { Matrix eyeProjection = matProjection; Matrix eyeModelView = matModelView; // Setup viewport and projection/modelview matrices using tracking data rlViewport(eye*screenWidth/2, 0, screenWidth/2, screenHeight); // Apply view offset to modelview matrix eyeModelView = MatrixMultiply(matModelView, vrConfig.eyesViewOffset[eye]); // Set current eye projection matrix eyeProjection = vrConfig.eyesProjection[eye]; SetMatrixModelview(eyeModelView); SetMatrixProjection(eyeProjection); } #endif // defined(SUPPORT_VR_SIMULATOR) #endif //defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2) #if defined(GRAPHICS_API_OPENGL_11) // Mipmaps data is generated after image data // NOTE: Only works with RGBA (4 bytes) data! static int GenerateMipmaps(unsigned char *data, int baseWidth, int baseHeight) { int mipmapCount = 1; // Required mipmap levels count (including base level) int width = baseWidth; int height = baseHeight; int size = baseWidth*baseHeight*4; // Size in bytes (will include mipmaps...), RGBA only // Count mipmap levels required while ((width != 1) && (height != 1)) { if (width != 1) width /= 2; if (height != 1) height /= 2; TraceLog(LOG_DEBUG, "Next mipmap size: %i x %i", width, height); mipmapCount++; size += (width*height*4); // Add mipmap size (in bytes) } TraceLog(LOG_DEBUG, "Total mipmaps required: %i", mipmapCount); TraceLog(LOG_DEBUG, "Total size of data required: %i", size); unsigned char *temp = realloc(data, size); if (temp != NULL) data = temp; else TraceLog(LOG_WARNING, "Mipmaps required memory could not be allocated"); width = baseWidth; height = baseHeight; size = (width*height*4); // Generate mipmaps // NOTE: Every mipmap data is stored after data Color *image = (Color *)malloc(width*height*sizeof(Color)); Color *mipmap = NULL; int offset = 0; int j = 0; for (int i = 0; i < size; i += 4) { image[j].r = data[i]; image[j].g = data[i + 1]; image[j].b = data[i + 2]; image[j].a = data[i + 3]; j++; } TraceLog(LOG_DEBUG, "Mipmap base (%ix%i)", width, height); for (int mip = 1; mip < mipmapCount; mip++) { mipmap = GenNextMipmap(image, width, height); offset += (width*height*4); // Size of last mipmap j = 0; width /= 2; height /= 2; size = (width*height*4); // Mipmap size to store after offset // Add mipmap to data for (int i = 0; i < size; i += 4) { data[offset + i] = mipmap[j].r; data[offset + i + 1] = mipmap[j].g; data[offset + i + 2] = mipmap[j].b; data[offset + i + 3] = mipmap[j].a; j++; } free(image); image = mipmap; mipmap = NULL; } free(mipmap); // free mipmap data return mipmapCount; } // Manual mipmap generation (basic scaling algorithm) static Color *GenNextMipmap(Color *srcData, int srcWidth, int srcHeight) { int x2, y2; Color prow, pcol; int width = srcWidth/2; int height = srcHeight/2; Color *mipmap = (Color *)malloc(width*height*sizeof(Color)); // Scaling algorithm works perfectly (box-filter) for (int y = 0; y < height; y++) { y2 = 2*y; for (int x = 0; x < width; x++) { x2 = 2*x; prow.r = (srcData[y2*srcWidth + x2].r + srcData[y2*srcWidth + x2 + 1].r)/2; prow.g = (srcData[y2*srcWidth + x2].g + srcData[y2*srcWidth + x2 + 1].g)/2; prow.b = (srcData[y2*srcWidth + x2].b + srcData[y2*srcWidth + x2 + 1].b)/2; prow.a = (srcData[y2*srcWidth + x2].a + srcData[y2*srcWidth + x2 + 1].a)/2; pcol.r = (srcData[(y2+1)*srcWidth + x2].r + srcData[(y2+1)*srcWidth + x2 + 1].r)/2; pcol.g = (srcData[(y2+1)*srcWidth + x2].g + srcData[(y2+1)*srcWidth + x2 + 1].g)/2; pcol.b = (srcData[(y2+1)*srcWidth + x2].b + srcData[(y2+1)*srcWidth + x2 + 1].b)/2; pcol.a = (srcData[(y2+1)*srcWidth + x2].a + srcData[(y2+1)*srcWidth + x2 + 1].a)/2; mipmap[y*width + x].r = (prow.r + pcol.r)/2; mipmap[y*width + x].g = (prow.g + pcol.g)/2; mipmap[y*width + x].b = (prow.b + pcol.b)/2; mipmap[y*width + x].a = (prow.a + pcol.a)/2; } } TraceLog(LOG_DEBUG, "Mipmap generated successfully (%ix%i)", width, height); return mipmap; } #endif #if defined(RLGL_STANDALONE) // Show trace log messages (LOG_INFO, LOG_WARNING, LOG_ERROR, LOG_DEBUG) void TraceLog(int msgType, const char *text, ...) { va_list args; va_start(args, text); switch (msgType) { case LOG_INFO: fprintf(stdout, "INFO: "); break; case LOG_ERROR: fprintf(stdout, "ERROR: "); break; case LOG_WARNING: fprintf(stdout, "WARNING: "); break; case LOG_DEBUG: fprintf(stdout, "DEBUG: "); break; default: break; } vfprintf(stdout, text, args); fprintf(stdout, "\n"); va_end(args); if (msgType == LOG_ERROR) exit(1); } // Get pixel data size in bytes (image or texture) // NOTE: Size depends on pixel format int GetPixelDataSize(int width, int height, int format) { int dataSize = 0; // Size in bytes int bpp = 0; // Bits per pixel switch (format) { case UNCOMPRESSED_GRAYSCALE: bpp = 8; break; case UNCOMPRESSED_GRAY_ALPHA: case UNCOMPRESSED_R5G6B5: case UNCOMPRESSED_R5G5B5A1: case UNCOMPRESSED_R4G4B4A4: bpp = 16; break; case UNCOMPRESSED_R8G8B8A8: bpp = 32; break; case UNCOMPRESSED_R8G8B8: bpp = 24; break; case UNCOMPRESSED_R32: bpp = 32; break; case UNCOMPRESSED_R32G32B32: bpp = 32*3; break; case UNCOMPRESSED_R32G32B32A32: bpp = 32*4; break; case COMPRESSED_DXT1_RGB: case COMPRESSED_DXT1_RGBA: case COMPRESSED_ETC1_RGB: case COMPRESSED_ETC2_RGB: case COMPRESSED_PVRT_RGB: case COMPRESSED_PVRT_RGBA: bpp = 4; break; case COMPRESSED_DXT3_RGBA: case COMPRESSED_DXT5_RGBA: case COMPRESSED_ETC2_EAC_RGBA: case COMPRESSED_ASTC_4x4_RGBA: bpp = 8; break; case COMPRESSED_ASTC_8x8_RGBA: bpp = 2; break; default: break; } dataSize = width*height*bpp/8; // Total data size in bytes return dataSize; } #endif #endif // RLGL_IMPLEMENTATION