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Review rlglInitGraphics()

This commit is contained in:
raysan5 2016-06-25 22:42:35 +02:00
parent f9f33926f7
commit 369b8532c0
2 changed files with 33 additions and 28 deletions
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1
CHANGELOG
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@ -27,6 +27,7 @@ other changes:
[core] Renamed WorldToScreen() to GetWorldToScreen()
[core] Removed function SetCustomCursor()
[core] Removed functions BeginDrawingEx(), BeginDrawingPro()
[core] Replaced functions InitDisplay() + InitGraphics() with: InitGraphicsDevice()
[core] Added support for field-of-view Y (fovy) on 3d Camera
[core] Added 2D camera mode functions: Begin2dMode() - End2dMode()
[core] Translate mouse inputs to Android touch/gestures internally

60
src/rlgl.c
View File

@ -1176,7 +1176,7 @@ void rlglDraw(void)
#endif
}
// Initialize Graphics Device (OpenGL stuff)
// Initialize OpenGL states
// NOTE: Stores global variables screenWidth and screenHeight
void rlglInitGraphics(int offsetX, int offsetY, int width, int height)
{
@ -1184,45 +1184,49 @@ void rlglInitGraphics(int offsetX, int offsetY, int width, int height)
screenWidth = width;
screenHeight = height;
// NOTE: Required! viewport must be recalculated if screen resized!
// Init state: Viewport
// NOTE: Viewport must be recalculated if screen is resized, don't confuse glViewport with the
// transformation matrix, glViewport just defines the area of the context that you will actually draw to.
glViewport(offsetX/2, offsetY/2, width - offsetX, height - offsetY); // Set viewport width and height
// NOTE: Don't confuse glViewport with the transformation matrix
// NOTE: glViewport just defines the area of the context that you will actually draw to.
glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Set clear color (black)
//glClearDepth(1.0f); // Clear depth buffer (default)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear used buffers, depth buffer is used for 3D
glDisable(GL_DEPTH_TEST); // Disable depth testing for 2D (only used for 3D)
// 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)
glEnable(GL_BLEND); // Enable color blending (required to work with transparencies)
// 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)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Improve quality of color and texture coordinate interpolation (Deprecated in OGL 3.0)
// Other options: GL_FASTEST, GL_DONT_CARE (default)
// 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)
// Init state: projection and modelview matrices
// NOTE: Setup global variables: projection and modelview
rlMatrixMode(RL_PROJECTION); // Switch to PROJECTION matrix
rlLoadIdentity(); // Reset current matrix (PROJECTION)
rlOrtho(0, width - offsetX, height - offsetY, 0, 0.0f, 1.0f); // Config orthographic mode: top-left corner --> (0,0)
rlOrtho(0, width - offsetX, height - offsetY, 0, 0.0f, 1.0f); // Orthographic projection mode with top-left corner at (0,0)
rlMatrixMode(RL_MODELVIEW); // Switch back to MODELVIEW matrix
rlLoadIdentity(); // Reset current matrix (MODELVIEW)
// NOTE: All shapes/models triangles are drawn CCW
glEnable(GL_CULL_FACE); // Enable backface culling (Disabled by default)
//glCullFace(GL_BACK); // Cull the Back face (default)
//glFrontFace(GL_CCW); // Front face are defined counter clockwise (default)
#if defined(GRAPHICS_API_OPENGL_11)
glShadeModel(GL_SMOOTH); // Smooth shading between vertex (vertex colors interpolation) (Deprecated on OpenGL 3.3+)
// Possible options: GL_SMOOTH (Color interpolation) or GL_FLAT (no interpolation)
#endif
// NOTE: projection and modelview could be set alternatively using:
//Matrix matOrtho = MatrixOrtho(0, width - offsetX, height - offsetY, 0, 0.0f, 1.0f);
//MatrixTranspose(&matOrtho);
//projection = matOrtho; // Global variable
//modelview = MatrixIdentity(); // Global variable
TraceLog(INFO, "OpenGL graphic device initialized successfully");
}
@ -2741,7 +2745,7 @@ void EndOculusDrawing(void)
rlPushMatrix();
rlBegin(RL_QUADS);
rlColor4ub(255, 255, 255, 255);
rlNormal3f(0.0f, 0.0f, 1.0f); // Normal vector pointing towards viewer
rlNormal3f(0.0f, 0.0f, 1.0f);
// Bottom-left corner for texture and quad
rlTexCoord2f(0.0f, 1.0f);