From 205089ff625e547617a9d58992398ae2a96b6df9 Mon Sep 17 00:00:00 2001 From: Kees Rijnen Date: Mon, 22 Jan 2018 06:00:39 -0800 Subject: [PATCH] Add opengl 4 demo that uses bindless textures and pesistent mapped vertex buffer --- demo/glfw_opengl4/Makefile | 26 ++ demo/glfw_opengl4/main.c | 221 ++++++++++ demo/glfw_opengl4/nuklear_glfw_gl4.h | 628 +++++++++++++++++++++++++++ 3 files changed, 875 insertions(+) create mode 100644 demo/glfw_opengl4/Makefile create mode 100644 demo/glfw_opengl4/main.c create mode 100644 demo/glfw_opengl4/nuklear_glfw_gl4.h diff --git a/demo/glfw_opengl4/Makefile b/demo/glfw_opengl4/Makefile new file mode 100644 index 0000000..da95261 --- /dev/null +++ b/demo/glfw_opengl4/Makefile @@ -0,0 +1,26 @@ +# Install +BIN = demo + +# Flags +CFLAGS += -std=c99 -pedantic -O2 + +SRC = main.c +OBJ = $(SRC:.c=.o) + +ifeq ($(OS),Windows_NT) +BIN := $(BIN).exe +LIBS = -lglfw3 -lopengl32 -lm -lGLU32 -lGLEW32 +else + UNAME_S := $(shell uname -s) + GLFW3 := $(shell pkg-config --libs glfw3) + ifeq ($(UNAME_S),Darwin) + LIBS := $(GLFW3) -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo -lm -lGLEW -L/usr/local/lib + else + LIBS = $(GLFW3) -lGL -lm -lGLU -lGLEW + endif +endif + +$(BIN): + @mkdir -p bin + rm -f bin/$(BIN) $(OBJS) + $(CC) $(SRC) $(CFLAGS) -o bin/$(BIN) $(LIBS) diff --git a/demo/glfw_opengl4/main.c b/demo/glfw_opengl4/main.c new file mode 100644 index 0000000..cf07272 --- /dev/null +++ b/demo/glfw_opengl4/main.c @@ -0,0 +1,221 @@ +/* nuklear - 1.32.0 - public domain */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define NK_INCLUDE_FIXED_TYPES +#define NK_INCLUDE_STANDARD_IO +#define NK_INCLUDE_STANDARD_VARARGS +#define NK_INCLUDE_DEFAULT_ALLOCATOR +#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT +#define NK_INCLUDE_FONT_BAKING +#define NK_INCLUDE_DEFAULT_FONT +#define NK_IMPLEMENTATION +#define NK_GLFW_GL4_IMPLEMENTATION +#include "../../nuklear.h" +#include "nuklear_glfw_gl4.h" + +#define WINDOW_WIDTH 1200 +#define WINDOW_HEIGHT 800 + +#define MAX_VERTEX_BUFFER 512 * 1024 +#define MAX_ELEMENT_BUFFER 128 * 1024 + +/* =============================================================== + * + * EXAMPLE + * + * ===============================================================*/ +/* This are some code examples to provide a small overview of what can be + * done with this library. To try out an example uncomment the defines */ +/*#define INCLUDE_ALL */ +/*#define INCLUDE_STYLE */ +/*#define INCLUDE_CALCULATOR */ +/*#define INCLUDE_OVERVIEW */ +/*#define INCLUDE_NODE_EDITOR */ + +#ifdef INCLUDE_ALL + #define INCLUDE_STYLE + #define INCLUDE_CALCULATOR + #define INCLUDE_OVERVIEW + #define INCLUDE_NODE_EDITOR +#endif + +#ifdef INCLUDE_STYLE + #include "../style.c" +#endif +#ifdef INCLUDE_CALCULATOR + #include "../calculator.c" +#endif +#ifdef INCLUDE_OVERVIEW + #include "../overview.c" +#endif +#ifdef INCLUDE_NODE_EDITOR + #include "../node_editor.c" +#endif + +/* =============================================================== + * + * DEMO + * + * ===============================================================*/ +static void error_callback(int e, const char *d) +{printf("Error %d: %s\n", e, d);} + +int main(void) +{ + /* Platform */ + static GLFWwindow *win; + int width = 0, height = 0; + struct nk_context *ctx; + struct nk_colorf bg; + + /* GLFW */ + glfwSetErrorCallback(error_callback); + if (!glfwInit()) { + fprintf(stdout, "[GFLW] failed to init!\n"); + exit(1); + } + glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); + glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3); + glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); +#ifdef __APPLE__ + glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); +#endif + win = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "Demo", NULL, NULL); + glfwMakeContextCurrent(win); + glfwGetWindowSize(win, &width, &height); + + /* OpenGL */ + glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT); + glewExperimental = 1; + if (glewInit() != GLEW_OK) { + fprintf(stderr, "Failed to setup GLEW\n"); + exit(1); + } + + ctx = nk_glfw3_init(win, NK_GLFW3_INSTALL_CALLBACKS, MAX_VERTEX_BUFFER, MAX_ELEMENT_BUFFER); + /* Load Fonts: if none of these are loaded a default font will be used */ + /* Load Cursor: if you uncomment cursor loading please hide the cursor */ + {struct nk_font_atlas *atlas; + nk_glfw3_font_stash_begin(&atlas); + /*struct nk_font *droid = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14, 0);*/ + /*struct nk_font *roboto = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 14, 0);*/ + /*struct nk_font *future = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13, 0);*/ + /*struct nk_font *clean = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12, 0);*/ + /*struct nk_font *tiny = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10, 0);*/ + /*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/ + nk_glfw3_font_stash_end(); + /*nk_style_load_all_cursors(ctx, atlas->cursors);*/ + /*nk_style_set_font(ctx, &droid->handle);*/} + + #ifdef INCLUDE_STYLE + /*set_style(ctx, THEME_WHITE);*/ + /*set_style(ctx, THEME_RED);*/ + /*set_style(ctx, THEME_BLUE);*/ + /*set_style(ctx, THEME_DARK);*/ + #endif + + /* Create bindless texture. + * The index returned is not the opengl resource id. + * IF you need the GL resource id use: nk_glfw3_get_tex_ogl_id() */ + enum {tex_width=256, tex_height=256}; + char pixels[tex_width * tex_height * 4]; + memset(pixels, 128, sizeof(pixels)); + + int tex_index = nk_glfw3_create_texture(pixels, tex_width, tex_height); + struct nk_image img = nk_image_id(tex_index); + + bg.r = 0.10f, bg.g = 0.18f, bg.b = 0.24f, bg.a = 1.0f; + while (!glfwWindowShouldClose(win)) + { + /* Input */ + glfwPollEvents(); + nk_glfw3_new_frame(); + + /* GUI */ + if (nk_begin(ctx, "Demo", nk_rect(50, 50, 230, 250), + NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE| + NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE)) + { + enum {EASY, HARD}; + static int op = EASY; + static int property = 20; + nk_layout_row_static(ctx, 30, 80, 1); + if (nk_button_label(ctx, "button")) + fprintf(stdout, "button pressed\n"); + + nk_layout_row_dynamic(ctx, 30, 2); + if (nk_option_label(ctx, "easy", op == EASY)) op = EASY; + if (nk_option_label(ctx, "hard", op == HARD)) op = HARD; + + nk_layout_row_dynamic(ctx, 25, 1); + nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1); + + nk_layout_row_dynamic(ctx, 20, 1); + nk_label(ctx, "background:", NK_TEXT_LEFT); + nk_layout_row_dynamic(ctx, 25, 1); + if (nk_combo_begin_color(ctx, nk_rgb_cf(bg), nk_vec2(nk_widget_width(ctx),400))) { + nk_layout_row_dynamic(ctx, 120, 1); + bg = nk_color_picker(ctx, bg, NK_RGBA); + nk_layout_row_dynamic(ctx, 25, 1); + bg.r = nk_propertyf(ctx, "#R:", 0, bg.r, 1.0f, 0.01f,0.005f); + bg.g = nk_propertyf(ctx, "#G:", 0, bg.g, 1.0f, 0.01f,0.005f); + bg.b = nk_propertyf(ctx, "#B:", 0, bg.b, 1.0f, 0.01f,0.005f); + bg.a = nk_propertyf(ctx, "#A:", 0, bg.a, 1.0f, 0.01f,0.005f); + nk_combo_end(ctx); + } + } + nk_end(ctx); + + /* Bindless Texture */ + if (nk_begin(ctx, "Texture", nk_rect(250, 150, 230, 250), + NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE| + NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE)) + { + struct nk_command_buffer *canvas = nk_window_get_canvas(ctx); + struct nk_rect total_space = nk_window_get_content_region(ctx); + nk_draw_image(canvas, total_space, &img, nk_white); + } + nk_end(ctx); + + /* -------------- EXAMPLES ---------------- */ + #ifdef INCLUDE_CALCULATOR + calculator(ctx); + #endif + #ifdef INCLUDE_OVERVIEW + overview(ctx); + #endif + #ifdef INCLUDE_NODE_EDITOR + node_editor(ctx); + #endif + /* ----------------------------------------- */ + + /* Draw */ + glfwGetWindowSize(win, &width, &height); + glViewport(0, 0, width, height); + glClear(GL_COLOR_BUFFER_BIT); + glClearColor(bg.r, bg.g, bg.b, bg.a); + /* IMPORTANT: `nk_glfw_render` modifies some global OpenGL state + * with blending, scissor, face culling, depth test and viewport and + * defaults everything back into a default state. + * Make sure to either a.) save and restore or b.) reset your own state after + * rendering the UI. */ + nk_glfw3_render(NK_ANTI_ALIASING_ON); + glfwSwapBuffers(win); + } + nk_glfw3_shutdown(); + glfwTerminate(); + return 0; +} + diff --git a/demo/glfw_opengl4/nuklear_glfw_gl4.h b/demo/glfw_opengl4/nuklear_glfw_gl4.h new file mode 100644 index 0000000..915cf16 --- /dev/null +++ b/demo/glfw_opengl4/nuklear_glfw_gl4.h @@ -0,0 +1,628 @@ +/* + * Nuklear - 1.32.0 - public domain + * no warrenty implied; use at your own risk. + * authored from 2015-2016 by Micha Mettke + */ +/* + * ============================================================== + * + * API + * + * =============================================================== + */ +#ifndef NK_GLFW_GL4_H_ +#define NK_GLFW_GL4_H_ + +#include +#include + +enum nk_glfw_init_state{ + NK_GLFW3_DEFAULT=0, + NK_GLFW3_INSTALL_CALLBACKS +}; + +NK_API struct nk_context* nk_glfw3_init(GLFWwindow *win, enum nk_glfw_init_state, int max_vertex_buffer, int max_element_buffer); +NK_API void nk_glfw3_shutdown(void); +NK_API void nk_glfw3_font_stash_begin(struct nk_font_atlas **atlas); +NK_API void nk_glfw3_font_stash_end(void); +NK_API void nk_glfw3_new_frame(void); +NK_API void nk_glfw3_render(enum nk_anti_aliasing); + +NK_API void nk_glfw3_device_destroy(void); +NK_API void nk_glfw3_device_create(void); + +NK_API void nk_glfw3_char_callback(GLFWwindow *win, unsigned int codepoint); +NK_API void nk_gflw3_scroll_callback(GLFWwindow *win, double xoff, double yoff); +NK_API void nk_glfw3_mouse_button_callback(GLFWwindow *win, int button, int action, int mods); + +NK_API GLuint nk_glfw3_get_tex_ogl_id(int tex_index); +NK_API GLuint64 nk_glfw3_get_tex_ogl_handle(int tex_index); +NK_API int nk_glfw3_create_texture(const void* image, int width, int height); +NK_API void nk_glfw3_destroy_texture(int tex_index); + +#endif +/* + * ============================================================== + * + * IMPLEMENTATION + * + * =============================================================== + */ +#ifdef NK_GLFW_GL4_IMPLEMENTATION +#undef NK_GLFW_GL4_IMPLEMENTATION + +#ifndef NK_GLFW_TEXT_MAX +#define NK_GLFW_TEXT_MAX 256 +#endif +#ifndef NK_GLFW_DOUBLE_CLICK_LO +#define NK_GLFW_DOUBLE_CLICK_LO 0.02 +#endif +#ifndef NK_GLFW_DOUBLE_CLICK_HI +#define NK_GLFW_DOUBLE_CLICK_HI 0.2 +#endif +#ifndef NK_GLFW_MAX_TEXTURES +#define NK_GLFW_MAX_TEXTURES 256 +#endif + +struct nk_glfw_vertex { + float position[2]; + float uv[2]; + nk_byte col[4]; +}; + +struct nk_glfw_device { + struct nk_buffer cmds; + struct nk_draw_null_texture null; + GLuint vbo, vao, ebo; + GLuint prog; + GLuint vert_shdr; + GLuint frag_shdr; + GLint attrib_pos; + GLint attrib_uv; + GLint attrib_col; + GLint uniform_tex; + GLint uniform_proj; + int font_tex_index; + int max_vertex_buffer; + int max_element_buffer; + struct nk_glfw_vertex *vert_buffer; + int *elem_buffer; + GLsync buffer_sync; + GLuint tex_ids[NK_GLFW_MAX_TEXTURES]; + GLuint64 tex_handles[NK_GLFW_MAX_TEXTURES]; +}; + +static struct nk_glfw { + GLFWwindow *win; + int width, height; + int display_width, display_height; + struct nk_glfw_device ogl; + struct nk_context ctx; + struct nk_font_atlas atlas; + struct nk_vec2 fb_scale; + unsigned int text[NK_GLFW_TEXT_MAX]; + int text_len; + struct nk_vec2 scroll; + double last_button_click; + int is_double_click_down; + struct nk_vec2 double_click_pos; +} glfw; + +#define NK_SHADER_VERSION "#version 450 core\n" +#define NK_SHADER_BINDLESS "#extension GL_ARB_bindless_texture : require\n" +#define NK_SHADER_64BIT "#extension GL_ARB_gpu_shader_int64 : require\n" + +NK_API void +nk_glfw3_device_create() +{ + GLint status; + static const GLchar *vertex_shader = + NK_SHADER_VERSION + NK_SHADER_BINDLESS + NK_SHADER_64BIT + "uniform mat4 ProjMtx;\n" + "in vec2 Position;\n" + "in vec2 TexCoord;\n" + "in vec4 Color;\n" + "out vec2 Frag_UV;\n" + "out vec4 Frag_Color;\n" + "void main() {\n" + " Frag_UV = TexCoord;\n" + " Frag_Color = Color;\n" + " gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n" + "}\n"; + static const GLchar *fragment_shader = + NK_SHADER_VERSION + NK_SHADER_BINDLESS + NK_SHADER_64BIT + "precision mediump float;\n" + "uniform uint64_t Texture;\n" + "in vec2 Frag_UV;\n" + "in vec4 Frag_Color;\n" + "out vec4 Out_Color;\n" + "void main(){\n" + " sampler2D smp = sampler2D(Texture);\n" + " Out_Color = Frag_Color * texture(smp, Frag_UV.st);\n" + "}\n"; + + struct nk_glfw_device *dev = &glfw.ogl; + nk_buffer_init_default(&dev->cmds); + dev->prog = glCreateProgram(); + dev->vert_shdr = glCreateShader(GL_VERTEX_SHADER); + dev->frag_shdr = glCreateShader(GL_FRAGMENT_SHADER); + glShaderSource(dev->vert_shdr, 1, &vertex_shader, 0); + glShaderSource(dev->frag_shdr, 1, &fragment_shader, 0); + glCompileShader(dev->vert_shdr); + glCompileShader(dev->frag_shdr); + glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status); + assert(status == GL_TRUE); + glGetShaderiv(dev->frag_shdr, GL_COMPILE_STATUS, &status); + assert(status == GL_TRUE); + glAttachShader(dev->prog, dev->vert_shdr); + glAttachShader(dev->prog, dev->frag_shdr); + glLinkProgram(dev->prog); + glGetProgramiv(dev->prog, GL_LINK_STATUS, &status); + assert(status == GL_TRUE); + + dev->uniform_tex = glGetUniformLocation(dev->prog, "Texture"); + dev->uniform_proj = glGetUniformLocation(dev->prog, "ProjMtx"); + dev->attrib_pos = glGetAttribLocation(dev->prog, "Position"); + dev->attrib_uv = glGetAttribLocation(dev->prog, "TexCoord"); + dev->attrib_col = glGetAttribLocation(dev->prog, "Color"); + + { + /* buffer setup */ + GLsizei vs = sizeof(struct nk_glfw_vertex); + size_t vp = offsetof(struct nk_glfw_vertex, position); + size_t vt = offsetof(struct nk_glfw_vertex, uv); + size_t vc = offsetof(struct nk_glfw_vertex, col); + + GLuint pos = (GLuint)dev->attrib_pos; + GLuint uv = (GLuint)dev->attrib_uv; + GLuint col = (GLuint)dev->attrib_col; + + glCreateVertexArrays(1, &dev->vao); + glCreateBuffers(1, &dev->vbo); + glCreateBuffers(1, &dev->ebo); + + glEnableVertexArrayAttrib(dev->vao, pos); + glEnableVertexArrayAttrib(dev->vao, uv); + glEnableVertexArrayAttrib(dev->vao, col); + + glVertexArrayAttribBinding(dev->vao, pos, 0); + glVertexArrayAttribBinding(dev->vao, uv, 0); + glVertexArrayAttribBinding(dev->vao, col, 0); + + glVertexArrayAttribFormat(dev->vao, pos, 2, GL_FLOAT, GL_FALSE, vp); + glVertexArrayAttribFormat(dev->vao, uv, 2, GL_FLOAT, GL_FALSE, vt); + glVertexArrayAttribFormat(dev->vao, col, 4, GL_UNSIGNED_BYTE, GL_TRUE, vc); + + glVertexArrayElementBuffer(dev->vao, dev->ebo); + glVertexArrayVertexBuffer(dev->vao, 0, dev->vbo, 0, vs); + } + + /* Persistent mapped buffers */ + GLsizei vb_size = dev->max_vertex_buffer; + GLsizei eb_size = dev->max_element_buffer; + GLbitfield flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT; + glNamedBufferStorage(dev->vbo, vb_size, 0, flags); + glNamedBufferStorage(dev->ebo, eb_size, 0, flags); + dev->vert_buffer = (struct nk_glfw_vertex*) glMapNamedBufferRange(dev->vbo, 0, vb_size, flags); + dev->elem_buffer = (int*) glMapNamedBufferRange(dev->ebo, 0, eb_size, flags); + + memset(dev->tex_ids, 0, sizeof(dev->tex_ids)); + memset(dev->tex_handles, 0, sizeof(dev->tex_handles)); +} + +NK_INTERN int +nk_glfw3_get_available_tex_index() +{ + struct nk_glfw_device *dev = &glfw.ogl; + for (int i=0; itex_ids[i] == 0) + return i; + } + + assert(0); /* max textures reached */ + return -1; +} + +NK_API GLuint +nk_glfw3_get_tex_ogl_id(int tex_index) +{ + struct nk_glfw_device *dev = &glfw.ogl; + assert(tex_index >= 0 && tex_index < NK_GLFW_MAX_TEXTURES); + return dev->tex_ids[tex_index]; +} + +NK_API GLuint64 +nk_glfw3_get_tex_ogl_handle(int tex_index) +{ + struct nk_glfw_device *dev = &glfw.ogl; + assert(tex_index >= 0 && tex_index < NK_GLFW_MAX_TEXTURES); + return dev->tex_handles[tex_index]; +} + +NK_API int +nk_glfw3_create_texture(const void* image, int width, int height) +{ + struct nk_glfw_device *dev = &glfw.ogl; + + int tex_index = nk_glfw3_get_available_tex_index(); + if (tex_index < 0) + return -1; + + GLsizei w = (GLsizei)width; + GLsizei h = (GLsizei)height; + + GLuint id; + glCreateTextures(GL_TEXTURE_2D, 1, &id); + dev->tex_ids[tex_index] = id; + + glTextureParameteri(id, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTextureParameteri(id, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glTextureParameteri(id, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTextureParameteri(id, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTextureStorage2D(id, 1, GL_RGBA8, w, h); + if (image) + glTextureSubImage2D(id, 0, 0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, image); + else + glClearTexImage(id, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); + + GLuint64 handle = glGetTextureHandleARB(id); + glMakeTextureHandleResidentARB(handle); + dev->tex_handles[tex_index] = handle; + + return tex_index; +} + +NK_API void +nk_glfw3_destroy_texture(int tex_index) +{ + struct nk_glfw_device *dev = &glfw.ogl; + GLuint id = nk_glfw3_get_tex_ogl_id(tex_index); + if (id==0) return; + GLuint64 handle = nk_glfw3_get_tex_ogl_handle(tex_index); + glMakeTextureHandleNonResidentARB(handle); + glDeleteTextures(1, &id); + dev->tex_ids[tex_index] = 0; + dev->tex_handles[tex_index] = 0; +} + +NK_INTERN void +nk_glfw3_device_upload_atlas(const void *image, int width, int height) +{ + struct nk_glfw_device *dev = &glfw.ogl; + dev->font_tex_index = nk_glfw3_create_texture(image, width, height); +} + +NK_API void +nk_glfw3_device_destroy(void) +{ + struct nk_glfw_device *dev = &glfw.ogl; + glDetachShader(dev->prog, dev->vert_shdr); + glDetachShader(dev->prog, dev->frag_shdr); + glDeleteShader(dev->vert_shdr); + glDeleteShader(dev->frag_shdr); + glDeleteProgram(dev->prog); + nk_glfw3_destroy_texture(dev->font_tex_index); + for (int i=0; ivbo); + glUnmapNamedBuffer(dev->ebo); + glDeleteBuffers(1, &dev->vbo); + glDeleteBuffers(1, &dev->ebo); + glDeleteVertexArrays(1, &dev->vao); + nk_buffer_free(&dev->cmds); +} + +NK_INTERN void +nk_glfw3_wait_for_buffer_unlock() +{ + struct nk_glfw_device *dev = &glfw.ogl; + if(!dev->buffer_sync) + return; + + while (1) { + GLenum wait = glClientWaitSync(dev->buffer_sync, GL_SYNC_FLUSH_COMMANDS_BIT, 1); + if (wait == GL_ALREADY_SIGNALED || wait == GL_CONDITION_SATISFIED) + return; + } +} + +NK_INTERN void +nk_glfw3_lock_buffer() +{ + struct nk_glfw_device *dev = &glfw.ogl; + if(dev->buffer_sync) glDeleteSync(dev->buffer_sync); + dev->buffer_sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0); +} + +NK_API void +nk_glfw3_render(enum nk_anti_aliasing AA) +{ + struct nk_glfw_device *dev = &glfw.ogl; + struct nk_buffer vbuf, ebuf; + GLfloat ortho[4][4] = { + {2.0f, 0.0f, 0.0f, 0.0f}, + {0.0f,-2.0f, 0.0f, 0.0f}, + {0.0f, 0.0f,-1.0f, 0.0f}, + {-1.0f,1.0f, 0.0f, 1.0f}, + }; + ortho[0][0] /= (GLfloat)glfw.width; + ortho[1][1] /= (GLfloat)glfw.height; + + /* setup global state */ + glEnable(GL_BLEND); + glBlendEquation(GL_FUNC_ADD); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glDisable(GL_CULL_FACE); + glDisable(GL_DEPTH_TEST); + glEnable(GL_SCISSOR_TEST); + + /* setup program */ + glUseProgram(dev->prog); + glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]); + glViewport(0,0,(GLsizei)glfw.display_width,(GLsizei)glfw.display_height); + { + /* convert from command queue into draw list and draw to screen */ + const struct nk_draw_command *cmd; + void *vertices, *elements; + const nk_draw_index *offset = NULL; + + glBindVertexArray(dev->vao); + + /* load draw vertices & elements directly into vertex + element buffer */ + vertices = dev->vert_buffer; + elements = dev->elem_buffer; + { + /* Wait until GPU is done with buffer */ + nk_glfw3_wait_for_buffer_unlock(); + + /* fill convert configuration */ + struct nk_convert_config config; + static const struct nk_draw_vertex_layout_element vertex_layout[] = { + {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_glfw_vertex, position)}, + {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_glfw_vertex, uv)}, + {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_glfw_vertex, col)}, + {NK_VERTEX_LAYOUT_END} + }; + NK_MEMSET(&config, 0, sizeof(config)); + config.vertex_layout = vertex_layout; + config.vertex_size = sizeof(struct nk_glfw_vertex); + config.vertex_alignment = NK_ALIGNOF(struct nk_glfw_vertex); + config.null = dev->null; + config.circle_segment_count = 22; + config.curve_segment_count = 22; + config.arc_segment_count = 22; + config.global_alpha = 1.0f; + config.shape_AA = AA; + config.line_AA = AA; + + /* setup buffers to load vertices and elements */ + nk_buffer_init_fixed(&vbuf, vertices, (size_t)dev->max_vertex_buffer); + nk_buffer_init_fixed(&ebuf, elements, (size_t)dev->max_element_buffer); + nk_convert(&glfw.ctx, &dev->cmds, &vbuf, &ebuf, &config); + + /* Lock buffer until GPU has finished draw command */ + nk_glfw3_lock_buffer(); + } + + /* iterate over and execute each draw command */ + nk_draw_foreach(cmd, &glfw.ctx, &dev->cmds) + { + if (!cmd->elem_count) continue; + int tex_index = cmd->texture.id; + GLuint64 tex_handle = nk_glfw3_get_tex_ogl_handle(tex_index); + + /* tex handle must be made resident in each context that uses it */ + if (!glIsTextureHandleResidentARB(tex_handle)) + glMakeTextureHandleResidentARB(tex_handle); + + glUniformHandleui64ARB(dev->uniform_tex, tex_handle); + glScissor( + (GLint)(cmd->clip_rect.x * glfw.fb_scale.x), + (GLint)((glfw.height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h)) * glfw.fb_scale.y), + (GLint)(cmd->clip_rect.w * glfw.fb_scale.x), + (GLint)(cmd->clip_rect.h * glfw.fb_scale.y)); + glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset); + offset += cmd->elem_count; + } + nk_clear(&glfw.ctx); + } + + /* default OpenGL state */ + glUseProgram(0); + glBindVertexArray(0); + glDisable(GL_BLEND); + glDisable(GL_SCISSOR_TEST); +} + +NK_API void +nk_glfw3_char_callback(GLFWwindow *win, unsigned int codepoint) +{ + (void)win; + if (glfw.text_len < NK_GLFW_TEXT_MAX) + glfw.text[glfw.text_len++] = codepoint; +} + +NK_API void +nk_gflw3_scroll_callback(GLFWwindow *win, double xoff, double yoff) +{ + (void)win; (void)xoff; + glfw.scroll.x += (float)xoff; + glfw.scroll.y += (float)yoff; +} + +NK_API void +nk_glfw3_mouse_button_callback(GLFWwindow* window, int button, int action, int mods) +{ + double x, y; + if (button != GLFW_MOUSE_BUTTON_LEFT) return; + glfwGetCursorPos(window, &x, &y); + if (action == GLFW_PRESS) { + double dt = glfwGetTime() - glfw.last_button_click; + if (dt > NK_GLFW_DOUBLE_CLICK_LO && dt < NK_GLFW_DOUBLE_CLICK_HI) { + glfw.is_double_click_down = nk_true; + glfw.double_click_pos = nk_vec2((float)x, (float)y); + } + glfw.last_button_click = glfwGetTime(); + } else glfw.is_double_click_down = nk_false; +} + +NK_INTERN void +nk_glfw3_clipbard_paste(nk_handle usr, struct nk_text_edit *edit) +{ + const char *text = glfwGetClipboardString(glfw.win); + if (text) nk_textedit_paste(edit, text, nk_strlen(text)); + (void)usr; +} + +NK_INTERN void +nk_glfw3_clipbard_copy(nk_handle usr, const char *text, int len) +{ + char *str = 0; + (void)usr; + if (!len) return; + str = (char*)malloc((size_t)len+1); + if (!str) return; + memcpy(str, text, (size_t)len); + str[len] = '\0'; + glfwSetClipboardString(glfw.win, str); + free(str); +} + +NK_API struct nk_context* +nk_glfw3_init(GLFWwindow *win, enum nk_glfw_init_state init_state, + int max_vertex_buffer, int max_element_buffer) +{ + glfw.win = win; + if (init_state == NK_GLFW3_INSTALL_CALLBACKS) { + glfwSetScrollCallback(win, nk_gflw3_scroll_callback); + glfwSetCharCallback(win, nk_glfw3_char_callback); + glfwSetMouseButtonCallback(win, nk_glfw3_mouse_button_callback); + } + nk_init_default(&glfw.ctx, 0); + glfw.ctx.clip.copy = nk_glfw3_clipbard_copy; + glfw.ctx.clip.paste = nk_glfw3_clipbard_paste; + glfw.ctx.clip.userdata = nk_handle_ptr(0); + glfw.last_button_click = 0; + + struct nk_glfw_device *dev = &glfw.ogl; + dev->max_vertex_buffer = max_vertex_buffer; + dev->max_element_buffer = max_element_buffer; + nk_glfw3_device_create(); + + glfw.is_double_click_down = nk_false; + glfw.double_click_pos = nk_vec2(0, 0); + + return &glfw.ctx; +} + +NK_API void +nk_glfw3_font_stash_begin(struct nk_font_atlas **atlas) +{ + nk_font_atlas_init_default(&glfw.atlas); + nk_font_atlas_begin(&glfw.atlas); + *atlas = &glfw.atlas; +} + +NK_API void +nk_glfw3_font_stash_end(void) +{ + const void *image; int w, h; + image = nk_font_atlas_bake(&glfw.atlas, &w, &h, NK_FONT_ATLAS_RGBA32); + nk_glfw3_device_upload_atlas(image, w, h); + nk_font_atlas_end(&glfw.atlas, nk_handle_id((int)glfw.ogl.font_tex_index), &glfw.ogl.null); + if (glfw.atlas.default_font) + nk_style_set_font(&glfw.ctx, &glfw.atlas.default_font->handle); +} + +NK_API void +nk_glfw3_new_frame(void) +{ + int i; + double x, y; + struct nk_context *ctx = &glfw.ctx; + struct GLFWwindow *win = glfw.win; + + glfwGetWindowSize(win, &glfw.width, &glfw.height); + glfwGetFramebufferSize(win, &glfw.display_width, &glfw.display_height); + glfw.fb_scale.x = (float)glfw.display_width/(float)glfw.width; + glfw.fb_scale.y = (float)glfw.display_height/(float)glfw.height; + + nk_input_begin(ctx); + for (i = 0; i < glfw.text_len; ++i) + nk_input_unicode(ctx, glfw.text[i]); + +#ifdef NK_GLFW_GL4_MOUSE_GRABBING + /* optional grabbing behavior */ + if (ctx->input.mouse.grab) + glfwSetInputMode(glfw.win, GLFW_CURSOR, GLFW_CURSOR_HIDDEN); + else if (ctx->input.mouse.ungrab) + glfwSetInputMode(glfw.win, GLFW_CURSOR, GLFW_CURSOR_NORMAL); +#endif + + nk_input_key(ctx, NK_KEY_DEL, glfwGetKey(win, GLFW_KEY_DELETE) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_ENTER, glfwGetKey(win, GLFW_KEY_ENTER) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TAB, glfwGetKey(win, GLFW_KEY_TAB) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_BACKSPACE, glfwGetKey(win, GLFW_KEY_BACKSPACE) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_UP, glfwGetKey(win, GLFW_KEY_UP) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_DOWN, glfwGetKey(win, GLFW_KEY_DOWN) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_START, glfwGetKey(win, GLFW_KEY_HOME) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_END, glfwGetKey(win, GLFW_KEY_END) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_SCROLL_START, glfwGetKey(win, GLFW_KEY_HOME) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_SCROLL_END, glfwGetKey(win, GLFW_KEY_END) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_SCROLL_DOWN, glfwGetKey(win, GLFW_KEY_PAGE_DOWN) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_SCROLL_UP, glfwGetKey(win, GLFW_KEY_PAGE_UP) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_SHIFT, glfwGetKey(win, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS|| + glfwGetKey(win, GLFW_KEY_RIGHT_SHIFT) == GLFW_PRESS); + + if (glfwGetKey(win, GLFW_KEY_LEFT_CONTROL) == GLFW_PRESS || + glfwGetKey(win, GLFW_KEY_RIGHT_CONTROL) == GLFW_PRESS) { + nk_input_key(ctx, NK_KEY_COPY, glfwGetKey(win, GLFW_KEY_C) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_PASTE, glfwGetKey(win, GLFW_KEY_V) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_CUT, glfwGetKey(win, GLFW_KEY_X) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_UNDO, glfwGetKey(win, GLFW_KEY_Z) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_REDO, glfwGetKey(win, GLFW_KEY_R) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, glfwGetKey(win, GLFW_KEY_LEFT) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, glfwGetKey(win, GLFW_KEY_RIGHT) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_LINE_START, glfwGetKey(win, GLFW_KEY_B) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_TEXT_LINE_END, glfwGetKey(win, GLFW_KEY_E) == GLFW_PRESS); + } else { + nk_input_key(ctx, NK_KEY_LEFT, glfwGetKey(win, GLFW_KEY_LEFT) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_RIGHT, glfwGetKey(win, GLFW_KEY_RIGHT) == GLFW_PRESS); + nk_input_key(ctx, NK_KEY_COPY, 0); + nk_input_key(ctx, NK_KEY_PASTE, 0); + nk_input_key(ctx, NK_KEY_CUT, 0); + nk_input_key(ctx, NK_KEY_SHIFT, 0); + } + + glfwGetCursorPos(win, &x, &y); + nk_input_motion(ctx, (int)x, (int)y); +#ifdef NK_GLFW_GL4_MOUSE_GRABBING + if (ctx->input.mouse.grabbed) { + glfwSetCursorPos(glfw.win, ctx->input.mouse.prev.x, ctx->input.mouse.prev.y); + ctx->input.mouse.pos.x = ctx->input.mouse.prev.x; + ctx->input.mouse.pos.y = ctx->input.mouse.prev.y; + } +#endif + nk_input_button(ctx, NK_BUTTON_LEFT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS); + nk_input_button(ctx, NK_BUTTON_MIDDLE, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_MIDDLE) == GLFW_PRESS); + nk_input_button(ctx, NK_BUTTON_RIGHT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_RIGHT) == GLFW_PRESS); + nk_input_button(ctx, NK_BUTTON_DOUBLE, (int)glfw.double_click_pos.x, (int)glfw.double_click_pos.y, glfw.is_double_click_down); + nk_input_scroll(ctx, glfw.scroll); + nk_input_end(&glfw.ctx); + glfw.text_len = 0; + glfw.scroll = nk_vec2(0,0); +} + +NK_API +void nk_glfw3_shutdown(void) +{ + nk_font_atlas_clear(&glfw.atlas); + nk_free(&glfw.ctx); + nk_glfw3_device_destroy(); + memset(&glfw, 0, sizeof(glfw)); +} + +#endif