ref: 71199c7693133816999542cd1152d57c7fd1327d
dir: /external/glfw/deps/nuklear_glfw_gl2.h/
/* * Nuklear - v1.32.0 - public domain * no warrenty implied; use at your own risk. * authored from 2015-2017 by Micha Mettke */ /* * ============================================================== * * API * * =============================================================== */ #ifndef NK_GLFW_GL2_H_ #define NK_GLFW_GL2_H_ #include <GLFW/glfw3.h> 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); 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_shutdown(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); #endif /* * ============================================================== * * IMPLEMENTATION * * =============================================================== */ #ifdef NK_GLFW_GL2_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 struct nk_glfw_device { struct nk_buffer cmds; struct nk_draw_null_texture null; GLuint font_tex; }; struct nk_glfw_vertex { float position[2]; float uv[2]; nk_byte col[4]; }; 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; NK_INTERN void nk_glfw3_device_upload_atlas(const void *image, int width, int height) { struct nk_glfw_device *dev = &glfw.ogl; glGenTextures(1, &dev->font_tex); glBindTexture(GL_TEXTURE_2D, dev->font_tex); 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, (GLsizei)width, (GLsizei)height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image); } NK_API void nk_glfw3_render(enum nk_anti_aliasing AA) { /* setup global state */ struct nk_glfw_device *dev = &glfw.ogl; glPushAttrib(GL_ENABLE_BIT|GL_COLOR_BUFFER_BIT|GL_TRANSFORM_BIT); glDisable(GL_CULL_FACE); glDisable(GL_DEPTH_TEST); glEnable(GL_SCISSOR_TEST); glEnable(GL_BLEND); glEnable(GL_TEXTURE_2D); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); /* setup viewport/project */ glViewport(0,0,(GLsizei)glfw.display_width,(GLsizei)glfw.display_height); glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity(); glOrtho(0.0f, glfw.width, glfw.height, 0.0f, -1.0f, 1.0f); glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadIdentity(); glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); glEnableClientState(GL_COLOR_ARRAY); { 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); /* convert from command queue into draw list and draw to screen */ const struct nk_draw_command *cmd; const nk_draw_index *offset = NULL; struct nk_buffer vbuf, ebuf; /* 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; /* convert shapes into vertexes */ nk_buffer_init_default(&vbuf); nk_buffer_init_default(&ebuf); nk_convert(&glfw.ctx, &dev->cmds, &vbuf, &ebuf, &config); /* setup vertex buffer pointer */ {const void *vertices = nk_buffer_memory_const(&vbuf); glVertexPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vp)); glTexCoordPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vt)); glColorPointer(4, GL_UNSIGNED_BYTE, vs, (const void*)((const nk_byte*)vertices + vc));} /* iterate over and execute each draw command */ offset = (const nk_draw_index*)nk_buffer_memory_const(&ebuf); nk_draw_foreach(cmd, &glfw.ctx, &dev->cmds) { if (!cmd->elem_count) continue; glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id); 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); nk_buffer_free(&vbuf); nk_buffer_free(&ebuf); } /* default OpenGL state */ glDisableClientState(GL_VERTEX_ARRAY); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glDisableClientState(GL_COLOR_ARRAY); glDisable(GL_CULL_FACE); glDisable(GL_DEPTH_TEST); glDisable(GL_SCISSOR_TEST); glDisable(GL_BLEND); glDisable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, 0); glMatrixMode(GL_MODELVIEW); glPopMatrix(); glMatrixMode(GL_PROJECTION); glPopMatrix(); glPopAttrib(); } 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; NK_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) { 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); nk_buffer_init_default(&glfw.ogl.cmds); 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), &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]); /* 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); 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); if (ctx->input.mouse.grabbed) { glfwSetCursorPos(glfw.win, (double)ctx->input.mouse.prev.x, (double)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; } 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) { struct nk_glfw_device *dev = &glfw.ogl; nk_font_atlas_clear(&glfw.atlas); nk_free(&glfw.ctx); glDeleteTextures(1, &dev->font_tex); nk_buffer_free(&dev->cmds); NK_MEMSET(&glfw, 0, sizeof(glfw)); } #endif