diff options
Diffstat (limited to 'libs/glfw-3.3.8/deps/nuklear_glfw_gl2.h')
| -rw-r--r-- | libs/glfw-3.3.8/deps/nuklear_glfw_gl2.h | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/libs/glfw-3.3.8/deps/nuklear_glfw_gl2.h b/libs/glfw-3.3.8/deps/nuklear_glfw_gl2.h new file mode 100644 index 0000000..61acc29 --- /dev/null +++ b/libs/glfw-3.3.8/deps/nuklear_glfw_gl2.h @@ -0,0 +1,381 @@ +/* + * 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 |