/* nuklear - v1.00 - 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_DEFAULT_ALLOCATOR #define NK_INCLUDE_VERTEX_BUFFER_OUTPUT #define NK_INCLUDE_FONT_BAKING #define NK_INCLUDE_DEFAULT_FONT #define NK_IMPLEMENTATION #include "../nuklear.h" #define STB_IMAGE_IMPLEMENTATION #include "stb_image.h" /* macros */ #define WINDOW_WIDTH 1200 #define WINDOW_HEIGHT 800 #define MAX_VERTEX_MEMORY 512 * 1024 #define MAX_ELEMENT_MEMORY 128 * 1024 #define UNUSED(a) (void)a #define MIN(a,b) ((a) < (b) ? (a) : (b)) #define MAX(a,b) ((a) < (b) ? (b) : (a)) #define LEN(a) (sizeof(a)/sizeof(a)[0]) #ifdef __APPLE__ #define NK_SHADER_VERSION "#version 150\n" #else #define NK_SHADER_VERSION "#version 300 es\n" #endif struct icons { struct nk_image unchecked; struct nk_image checked; struct nk_image rocket; struct nk_image cloud; struct nk_image pen; struct nk_image play; struct nk_image pause; struct nk_image stop; struct nk_image prev; struct nk_image next; struct nk_image tools; struct nk_image dir; struct nk_image copy; struct nk_image convert; struct nk_image del; struct nk_image edit; struct nk_image images[9]; struct nk_image menu[6]; }; /* =============================================================== * * CUSTOM WIDGET * * ===============================================================*/ static int ui_piemenu(struct nk_context *ctx, struct nk_vec2 pos, float radius, struct nk_image *icons, int item_count) { int ret = -1; struct nk_rect total_space; struct nk_panel popup; struct nk_rect bounds; int active_item = 0; /* pie menu popup */ struct nk_color border = ctx->style.window.border_color; struct nk_style_item background = ctx->style.window.fixed_background; ctx->style.window.fixed_background = nk_style_item_hide(); ctx->style.window.border_color = nk_rgba(0,0,0,0); total_space = nk_window_get_content_region(ctx); nk_popup_begin(ctx, &popup, NK_POPUP_STATIC, "piemenu", NK_WINDOW_NO_SCROLLBAR, nk_rect(pos.x - total_space.x - radius, pos.y - radius - total_space.y, 2*radius,2*radius)); total_space = nk_window_get_content_region(ctx); nk_layout_row_dynamic(ctx, total_space.h, 1); { int i = 0; struct nk_command_buffer* out = nk_window_get_canvas(ctx); const struct nk_input *in = &ctx->input; { /* allocate complete popup space for the menu */ enum nk_widget_layout_states state; total_space = nk_window_get_content_region(ctx); total_space.x = total_space.y = 0; state = nk_widget(&bounds, ctx); } /* outer circle */ nk_fill_circle(out, bounds, nk_rgb(50,50,50)); { /* circle buttons */ float step = (2 * 3.141592654f) / (float)(MAX(1,item_count)); float a_min = 0; float a_max = step; struct nk_vec2 center = nk_vec2(bounds.x + bounds.w / 2.0f, bounds.y + bounds.h / 2.0f); struct nk_vec2 drag = nk_vec2(in->mouse.pos.x - center.x, in->mouse.pos.y - center.y); float angle = (float)atan2(drag.y, drag.x); if (angle < -0.0f) angle += 2.0f * 3.141592654f; active_item = (int)(angle/step); for (i = 0; i < item_count; ++i) { struct nk_rect content; float rx, ry, dx, dy, a; nk_fill_arc(out, center.x, center.y, (bounds.w/2.0f), a_min, a_max, (active_item == i) ? nk_rgb(45,100,255): nk_rgb(60,60,60)); /* separator line */ rx = bounds.w/2.0f; ry = 0; dx = rx * (float)cos(a_min) - ry * (float)sin(a_min); dy = rx * (float)sin(a_min) + ry * (float)cos(a_min); nk_stroke_line(out, center.x, center.y, center.x + dx, center.y + dy, 1.0f, nk_rgb(50,50,50)); /* button content */ a = a_min + (a_max - a_min)/2.0f; rx = bounds.w/2.5f; ry = 0; content.w = 30; content.h = 30; content.x = center.x + ((rx * (float)cos(a) - ry * (float)sin(a)) - content.w/2.0f); content.y = center.y + (rx * (float)sin(a) + ry * (float)cos(a) - content.h/2.0f); nk_draw_image(out, content, &icons[i]); a_min = a_max; a_max += step; } } { /* inner circle */ struct nk_rect inner; inner.x = bounds.x + bounds.w/2 - bounds.w/4; inner.y = bounds.y + bounds.h/2 - bounds.h/4; inner.w = bounds.w/2; inner.h = bounds.h/2; nk_fill_circle(out, inner, nk_rgb(45,45,45)); /* active icon content */ bounds.w = inner.w / 2.0f; bounds.h = inner.h / 2.0f; bounds.x = inner.x + inner.w/2 - bounds.w/2; bounds.y = inner.y + inner.h/2 - bounds.h/2; nk_draw_image(out, bounds, &icons[active_item]); } } nk_layout_space_end(ctx); nk_popup_end(ctx); ctx->style.window.fixed_background = background; ctx->style.window.border_color = border; if (!nk_input_is_mouse_down(&ctx->input, NK_BUTTON_RIGHT)) return active_item; else return ret; } /* =============================================================== * * GRID * * ===============================================================*/ static void grid_demo(struct nk_context *ctx) { static char text[3][64]; static int text_len[3]; static const char *items[] = {"Item 0","item 1","item 2"}; static int selected_item = 0; static int check = 1; struct nk_panel layout; int i; struct nk_panel combo; ctx->style.font.height = 20; if (nk_begin(ctx, &layout, "Grid Demo", nk_rect(600, 350, 275, 250), NK_WINDOW_TITLE|NK_WINDOW_BORDER|NK_WINDOW_MOVABLE| NK_WINDOW_BORDER_HEADER|NK_WINDOW_NO_SCROLLBAR)) { ctx->style.font.height = 18; nk_layout_row_dynamic(ctx, 30, 2); nk_label(ctx, "Floating point:", NK_TEXT_RIGHT); nk_edit_string(ctx, NK_EDIT_FIELD, text[0], &text_len[0], 64, nk_filter_float); nk_label(ctx, "Hexadeximal:", NK_TEXT_RIGHT); nk_edit_string(ctx, NK_EDIT_FIELD, text[1], &text_len[1], 64, nk_filter_hex); nk_label(ctx, "Binary:", NK_TEXT_RIGHT); nk_edit_string(ctx, NK_EDIT_FIELD, text[2], &text_len[2], 64, nk_filter_binary); nk_label(ctx, "Checkbox:", NK_TEXT_RIGHT); nk_checkbox_label(ctx, "Check me", &check); nk_label(ctx, "Combobox:", NK_TEXT_RIGHT); if (nk_combo_begin_label(ctx, &combo, items[selected_item], 200)) { nk_layout_row_dynamic(ctx, 30, 1); for (i = 0; i < 3; ++i) if (nk_combo_item_label(ctx, items[i], NK_TEXT_LEFT)) selected_item = i; nk_combo_end(ctx); } } nk_end(ctx); ctx->style.font.height = 14; } /* =============================================================== * * BUTTON DEMO * * ===============================================================*/ static void ui_header(struct nk_context *ctx, const char *title) { ctx->style.font.height = 18; nk_layout_row_dynamic(ctx, 20, 1); nk_label(ctx, title, NK_TEXT_LEFT); } static void ui_widget(struct nk_context *ctx, float height, float font_height) { static const float ratio[] = {0.15f, 0.85f}; ctx->style.font.height = font_height; nk_layout_row(ctx, NK_DYNAMIC, height, 2, ratio); nk_spacing(ctx, 1); } static void ui_widget_centered(struct nk_context *ctx, float height, float font_height) { static const float ratio[] = {0.15f, 0.50f, 0.35f}; ctx->style.font.height = font_height; nk_layout_row(ctx, NK_DYNAMIC, height, 3, ratio); nk_spacing(ctx, 1); } static void button_demo(struct nk_context *ctx, struct icons *img) { struct nk_panel layout; struct nk_panel menu; static int option = 1; static int toggle0 = 1; static int toggle1 = 0; static int toggle2 = 1; ctx->style.font.height = 20; nk_begin(ctx, &layout, "Button Demo", nk_rect(50,50,255,610), NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_BORDER_HEADER|NK_WINDOW_TITLE); /*------------------------------------------------ * MENU *------------------------------------------------*/ nk_menubar_begin(ctx); { /* toolbar */ nk_layout_row_static(ctx, 40, 40, 4); if (nk_menu_begin_image(ctx, &menu, "Music", img->play, 120)) { /* settings */ nk_layout_row_dynamic(ctx, 25, 1); nk_menu_item_image_label(ctx, img->play, "Play", NK_TEXT_RIGHT); nk_menu_item_image_label(ctx, img->stop, "Stop", NK_TEXT_RIGHT); nk_menu_item_image_label(ctx, img->pause, "Pause", NK_TEXT_RIGHT); nk_menu_item_image_label(ctx, img->next, "Next", NK_TEXT_RIGHT); nk_menu_item_image_label(ctx, img->prev, "Prev", NK_TEXT_RIGHT); nk_menu_end(ctx); } nk_button_image(ctx, img->tools, NK_BUTTON_DEFAULT); nk_button_image(ctx, img->cloud, NK_BUTTON_DEFAULT); nk_button_image(ctx, img->pen, NK_BUTTON_DEFAULT); } nk_menubar_end(ctx); /*------------------------------------------------ * BUTTON *------------------------------------------------*/ ui_header(ctx, "Push buttons"); ui_widget(ctx, 35, 22); if (nk_button_label(ctx, "Push me", NK_BUTTON_DEFAULT)) fprintf(stdout, "pushed!\n"); ui_widget(ctx, 35, 22); if (nk_button_image_label(ctx, img->rocket, "Styled", NK_TEXT_CENTERED, NK_BUTTON_DEFAULT)) fprintf(stdout, "rocket!\n"); /*------------------------------------------------ * REPEATER *------------------------------------------------*/ ui_header(ctx, "Repeater"); ui_widget(ctx, 35, 22); if (nk_button_label(ctx, "Press me", NK_BUTTON_REPEATER)) fprintf(stdout, "pressed!\n"); /*------------------------------------------------ * TOGGLE *------------------------------------------------*/ ui_header(ctx, "Toggle buttons"); ui_widget(ctx, 35, 22); if (nk_button_image_label(ctx, (toggle0) ? img->checked: img->unchecked, "Toggle", NK_TEXT_LEFT, NK_BUTTON_DEFAULT)) toggle0 = !toggle0; ui_widget(ctx, 35, 22); if (nk_button_image_label(ctx, (toggle1) ? img->checked: img->unchecked, "Toggle", NK_TEXT_LEFT, NK_BUTTON_DEFAULT)) toggle1 = !toggle1; ui_widget(ctx, 35, 22); if (nk_button_image_label(ctx, (toggle2) ? img->checked: img->unchecked, "Toggle", NK_TEXT_LEFT, NK_BUTTON_DEFAULT)) toggle2 = !toggle2; /*------------------------------------------------ * RADIO *------------------------------------------------*/ ui_header(ctx, "Radio buttons"); ui_widget(ctx, 35, 22); if (nk_button_symbol_label(ctx, (option == 0)?NK_SYMBOL_CIRCLE_FILLED:NK_SYMBOL_CIRCLE, "Select", NK_TEXT_LEFT, NK_BUTTON_DEFAULT)) option = 0; ui_widget(ctx, 35, 22); if (nk_button_symbol_label(ctx, (option == 1)?NK_SYMBOL_CIRCLE_FILLED:NK_SYMBOL_CIRCLE, "Select", NK_TEXT_LEFT, NK_BUTTON_DEFAULT)) option = 1; ui_widget(ctx, 35, 22); if (nk_button_symbol_label(ctx, (option == 2)?NK_SYMBOL_CIRCLE_FILLED:NK_SYMBOL_CIRCLE, "Select", NK_TEXT_LEFT, NK_BUTTON_DEFAULT)) option = 2; /*------------------------------------------------ * CONTEXTUAL *------------------------------------------------*/ if (nk_contextual_begin(ctx, &menu, NK_WINDOW_NO_SCROLLBAR, nk_vec2(120, 200), nk_window_get_bounds(ctx))) { ctx->style.font.height = 18; nk_layout_row_dynamic(ctx, 25, 1); if (nk_contextual_item_image_label(ctx, img->copy, "Clone", NK_TEXT_RIGHT)) fprintf(stdout, "pressed clone!\n"); if (nk_contextual_item_image_label(ctx, img->del, "Delete", NK_TEXT_RIGHT)) fprintf(stdout, "pressed delete!\n"); if (nk_contextual_item_image_label(ctx, img->convert, "Convert", NK_TEXT_RIGHT)) fprintf(stdout, "pressed convert!\n"); if (nk_contextual_item_image_label(ctx, img->edit, "Edit", NK_TEXT_RIGHT)) fprintf(stdout, "pressed edit!\n"); nk_contextual_end(ctx); } ctx->style.font.height = 14; nk_end(ctx); } /* =============================================================== * * BASIC DEMO * * ===============================================================*/ static void basic_demo(struct nk_context *ctx, struct icons *img) { static int image_active; static int check0 = 1; static int check1 = 0; static size_t prog = 80; static int selected_item = 0; static int selected_image = 3; static int selected_icon = 0; static const char *items[] = {"Item 0","item 1","item 2"}; static int piemenu_active = 0; static struct nk_vec2 piemenu_pos; int i = 0; struct nk_panel layout; struct nk_panel combo; ctx->style.font.height = 20; nk_begin(ctx, &layout, "Basic Demo", nk_rect(320, 50, 275, 610), NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_BORDER_HEADER|NK_WINDOW_TITLE); /*------------------------------------------------ * POPUP BUTTON *------------------------------------------------*/ ui_header(ctx, "Popup & Scrollbar & Images"); ui_widget(ctx, 35, 22); if (nk_button_image_label(ctx, img->dir, "Images", NK_TEXT_CENTERED, NK_BUTTON_DEFAULT)) image_active = !image_active; /*------------------------------------------------ * SELECTED IMAGE *------------------------------------------------*/ ui_header(ctx, "Selected Image"); ui_widget_centered(ctx, 100, 22); nk_image(ctx, img->images[selected_image]); /*------------------------------------------------ * IMAGE POPUP *------------------------------------------------*/ if (image_active) { struct nk_panel popup; if (nk_popup_begin(ctx, &popup, NK_POPUP_STATIC, "Image Popup", 0, nk_rect(265, 0, 320, 220))) { nk_layout_row_static(ctx, 82, 82, 3); for (i = 0; i < 9; ++i) { if (nk_button_image(ctx, img->images[i], NK_BUTTON_DEFAULT)) { selected_image = i; image_active = 0; nk_popup_close(ctx); } } nk_popup_end(ctx); } } /*------------------------------------------------ * COMBOBOX *------------------------------------------------*/ ui_header(ctx, "Combo box"); ui_widget(ctx, 40, 22); if (nk_combo_begin_label(ctx, &combo, items[selected_item], 200)) { nk_layout_row_dynamic(ctx, 35, 1); for (i = 0; i < 3; ++i) if (nk_combo_item_label(ctx, items[i], NK_TEXT_LEFT)) selected_item = i; nk_combo_end(ctx); } ui_widget(ctx, 40, 22); if (nk_combo_begin_image_label(ctx, &combo, items[selected_icon], img->images[selected_icon], 200)) { nk_layout_row_dynamic(ctx, 35, 1); for (i = 0; i < 3; ++i) if (nk_combo_item_image_label(ctx, img->images[i], items[i], NK_TEXT_RIGHT)) selected_icon = i; nk_combo_end(ctx); } /*------------------------------------------------ * CHECKBOX *------------------------------------------------*/ ui_header(ctx, "Checkbox"); ui_widget(ctx, 30, 22); nk_checkbox_label(ctx, "Flag 1", &check0); ui_widget(ctx, 30, 22); nk_checkbox_label(ctx, "Flag 2", &check1); /*------------------------------------------------ * PROGRESSBAR *------------------------------------------------*/ ui_header(ctx, "Progressbar"); ui_widget(ctx, 35, 22); nk_progress(ctx, &prog, 100, nk_true); /*------------------------------------------------ * PIEMENU *------------------------------------------------*/ if (nk_input_is_mouse_click_down_in_rect(&ctx->input, NK_BUTTON_RIGHT, layout.bounds,nk_true)){ piemenu_pos = ctx->input.mouse.pos; piemenu_active = 1; } if (piemenu_active) { int ret = ui_piemenu(ctx, piemenu_pos, 140, &img->menu[0], 6); if (ret != -1) { fprintf(stdout, "piemenu selected: %d\n", ret); piemenu_active = 0; } } ctx->style.font.height = 14; nk_end(ctx); } /* =============================================================== * * DEVICE * * ===============================================================*/ struct 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; GLuint font_tex; }; static void die(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); fputs("\n", stderr); exit(EXIT_FAILURE); } static struct nk_image icon_load(const char *filename) { int x,y,n; GLuint tex; unsigned char *data = stbi_load(filename, &x, &y, &n, 0); if (!data) die("[SDL]: failed to load image: %s", filename); glGenTextures(1, &tex); glBindTexture(GL_TEXTURE_2D, tex); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, data); glGenerateMipmap(GL_TEXTURE_2D); stbi_image_free(data); return nk_image_id((int)tex); } static void device_init(struct device *dev) { GLint status; static const GLchar *vertex_shader = NK_SHADER_VERSION "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 "precision mediump float;\n" "uniform sampler2D Texture;\n" "in vec2 Frag_UV;\n" "in vec4 Frag_Color;\n" "out vec4 Out_Color;\n" "void main(){\n" " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" "}\n"; 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_draw_vertex); size_t vp = offsetof(struct nk_draw_vertex, position); size_t vt = offsetof(struct nk_draw_vertex, uv); size_t vc = offsetof(struct nk_draw_vertex, col); glGenBuffers(1, &dev->vbo); glGenBuffers(1, &dev->ebo); glGenVertexArrays(1, &dev->vao); glBindVertexArray(dev->vao); glBindBuffer(GL_ARRAY_BUFFER, dev->vbo); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo); glEnableVertexAttribArray((GLuint)dev->attrib_pos); glEnableVertexAttribArray((GLuint)dev->attrib_uv); glEnableVertexAttribArray((GLuint)dev->attrib_col); glVertexAttribPointer((GLuint)dev->attrib_pos, 2, GL_FLOAT, GL_FALSE, vs, (void*)vp); glVertexAttribPointer((GLuint)dev->attrib_uv, 2, GL_FLOAT, GL_FALSE, vs, (void*)vt); glVertexAttribPointer((GLuint)dev->attrib_col, 4, GL_UNSIGNED_BYTE, GL_TRUE, vs, (void*)vc); } glBindTexture(GL_TEXTURE_2D, 0); glBindBuffer(GL_ARRAY_BUFFER, 0); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); glBindVertexArray(0); } static void device_upload_atlas(struct device *dev, const void *image, int width, int height) { 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); } static void device_shutdown(struct device *dev) { glDetachShader(dev->prog, dev->vert_shdr); glDetachShader(dev->prog, dev->frag_shdr); glDeleteShader(dev->vert_shdr); glDeleteShader(dev->frag_shdr); glDeleteProgram(dev->prog); glDeleteTextures(1, &dev->font_tex); glDeleteBuffers(1, &dev->vbo); glDeleteBuffers(1, &dev->ebo); nk_buffer_free(&dev->cmds); } static void device_draw(struct device *dev, struct nk_context *ctx, int width, int height, enum nk_anti_aliasing AA) { GLint last_prog, last_tex; GLint last_ebo, last_vbo, last_vao; 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)width; ortho[1][1] /= (GLfloat)height; /* save previous opengl state */ glGetIntegerv(GL_CURRENT_PROGRAM, &last_prog); glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_tex); glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_vao); glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_ebo); glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vbo); /* 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); glActiveTexture(GL_TEXTURE0); /* setup program */ glUseProgram(dev->prog); glUniform1i(dev->uniform_tex, 0); glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]); { /* 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; /* allocate vertex and element buffer */ glBindVertexArray(dev->vao); glBindBuffer(GL_ARRAY_BUFFER, dev->vbo); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo); glBufferData(GL_ARRAY_BUFFER, MAX_VERTEX_MEMORY, NULL, GL_STREAM_DRAW); glBufferData(GL_ELEMENT_ARRAY_BUFFER, MAX_ELEMENT_MEMORY, NULL, GL_STREAM_DRAW); /* load draw vertices & elements directly into vertex + element buffer */ vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY); elements = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY); { /* fill converting configuration */ struct nk_convert_config config; memset(&config, 0, sizeof(config)); config.global_alpha = 1.0f; config.shape_AA = AA; config.line_AA = AA; config.circle_segment_count = 22; config.curve_segment_count = 22; config.arc_segment_count = 22; config.null = dev->null; /* setup buffers to load vertices and elements */ {struct nk_buffer vbuf, ebuf; nk_buffer_init_fixed(&vbuf, vertices, MAX_VERTEX_MEMORY); nk_buffer_init_fixed(&ebuf, elements, MAX_ELEMENT_MEMORY); nk_convert(ctx, &dev->cmds, &vbuf, &ebuf, &config);} } glUnmapBuffer(GL_ARRAY_BUFFER); glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER); /* iterate over and execute each draw command */ nk_draw_foreach(cmd, ctx, &dev->cmds) { if (!cmd->elem_count) continue; glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id); glScissor((GLint)cmd->clip_rect.x, height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h), (GLint)cmd->clip_rect.w, (GLint)cmd->clip_rect.h); glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset); offset += cmd->elem_count; } nk_clear(ctx); } /* restore old state */ glUseProgram((GLuint)last_prog); glBindTexture(GL_TEXTURE_2D, (GLuint)last_tex); glBindBuffer(GL_ARRAY_BUFFER, (GLuint)last_vbo); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, (GLuint)last_ebo); glBindVertexArray((GLuint)last_vao); glDisable(GL_SCISSOR_TEST); } /* glfw callbacks (I don't know if there is a easier way to access text and scroll )*/ static void error_callback(int e, const char *d){printf("Error %d: %s\n", e, d);} static void text_input(GLFWwindow *win, unsigned int codepoint) {nk_input_unicode((struct nk_context*)glfwGetWindowUserPointer(win), codepoint);} static void scroll_input(GLFWwindow *win, double _, double yoff) {UNUSED(_);nk_input_scroll((struct nk_context*)glfwGetWindowUserPointer(win), (float)yoff);} int main(int argc, char *argv[]) { /* Platform */ static GLFWwindow *win; int width = 0, height = 0; /* GUI */ struct device device; struct nk_font *font; struct nk_font_atlas atlas; struct icons icons; struct nk_context ctx; /* 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); glfwSetWindowUserPointer(win, &ctx); glfwSetCharCallback(win, text_input); glfwSetScrollCallback(win, scroll_input); /* OpenGL */ glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT); glewExperimental = 1; if (glewInit() != GLEW_OK) { fprintf(stderr, "Failed to setup GLEW\n"); exit(1); } {/* GUI */ device_init(&device); {const void *image; int w, h; const char *font_path = (argc > 1) ? argv[1]: 0; nk_font_atlas_init_default(&atlas); nk_font_atlas_begin(&atlas); if (font_path) font = nk_font_atlas_add_from_file(&atlas, font_path, 14.0f, NULL); else font = nk_font_atlas_add_default(&atlas, 14.0f, NULL); image = nk_font_atlas_bake(&atlas, &w, &h, NK_FONT_ATLAS_RGBA32); device_upload_atlas(&device, image, w, h); nk_font_atlas_end(&atlas, nk_handle_id((int)device.font_tex), &device.null);} nk_init_default(&ctx, &font->handle);} /* icons */ glEnable(GL_TEXTURE_2D); icons.unchecked = icon_load("../icon/unchecked.png"); icons.checked = icon_load("../icon/checked.png"); icons.rocket = icon_load("../icon/rocket.png"); icons.cloud = icon_load("../icon/cloud.png"); icons.pen = icon_load("../icon/pen.png"); icons.play = icon_load("../icon/play.png"); icons.pause = icon_load("../icon/pause.png"); icons.stop = icon_load("../icon/stop.png"); icons.next = icon_load("../icon/next.png"); icons.prev = icon_load("../icon/prev.png"); icons.tools = icon_load("../icon/tools.png"); icons.dir = icon_load("../icon/directory.png"); icons.copy = icon_load("../icon/copy.png"); icons.convert = icon_load("../icon/export.png"); icons.del = icon_load("../icon/delete.png"); icons.edit = icon_load("../icon/edit.png"); icons.menu[0] = icon_load("../icon/home.png"); icons.menu[1] = icon_load("../icon/phone.png"); icons.menu[2] = icon_load("../icon/plane.png"); icons.menu[3] = icon_load("../icon/wifi.png"); icons.menu[4] = icon_load("../icon/settings.png"); icons.menu[5] = icon_load("../icon/volume.png"); {int i; for (i = 0; i < 9; ++i) { char buffer[256]; sprintf(buffer, "../images/image%d.png", (i+1)); icons.images[i] = icon_load(buffer); }} while (!glfwWindowShouldClose(win)) { /* Input */ {double x, y; nk_input_begin(&ctx); glfwPollEvents(); 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_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_UP, glfwGetKey(win, GLFW_KEY_UP) == GLFW_PRESS); nk_input_key(&ctx, NK_KEY_DOWN, glfwGetKey(win, GLFW_KEY_DOWN) == GLFW_PRESS); if (glfwGetKey(win, GLFW_KEY_LEFT_CONTROL) == GLFW_PRESS || glfwGetKey(win, GLFW_KEY_RIGHT_CONTROL)) { 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_P) == GLFW_PRESS); nk_input_key(&ctx, NK_KEY_CUT, glfwGetKey(win, GLFW_KEY_X) == GLFW_PRESS); nk_input_key(&ctx, NK_KEY_CUT, glfwGetKey(win, GLFW_KEY_E) == GLFW_PRESS); nk_input_key(&ctx, NK_KEY_SHIFT, 1); } else { 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); 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_end(&ctx);} /* GUI */ basic_demo(&ctx, &icons); button_demo(&ctx, &icons); grid_demo(&ctx); /* Draw */ glfwGetWindowSize(win, &width, &height); glViewport(0, 0, width, height); glClear(GL_COLOR_BUFFER_BIT); glClearColor(0.2f, 0.2f, 0.2f, 1.0f); device_draw(&device, &ctx, width, height, NK_ANTI_ALIASING_ON); glfwSwapBuffers(win); } glDeleteTextures(1,(const GLuint*)&icons.unchecked.handle.id); glDeleteTextures(1,(const GLuint*)&icons.checked.handle.id); glDeleteTextures(1,(const GLuint*)&icons.rocket.handle.id); glDeleteTextures(1,(const GLuint*)&icons.cloud.handle.id); glDeleteTextures(1,(const GLuint*)&icons.pen.handle.id); glDeleteTextures(1,(const GLuint*)&icons.play.handle.id); glDeleteTextures(1,(const GLuint*)&icons.pause.handle.id); glDeleteTextures(1,(const GLuint*)&icons.stop.handle.id); glDeleteTextures(1,(const GLuint*)&icons.next.handle.id); glDeleteTextures(1,(const GLuint*)&icons.prev.handle.id); glDeleteTextures(1,(const GLuint*)&icons.tools.handle.id); glDeleteTextures(1,(const GLuint*)&icons.dir.handle.id); glDeleteTextures(1,(const GLuint*)&icons.del.handle.id); nk_font_atlas_clear(&atlas); nk_free(&ctx); device_shutdown(&device); glfwTerminate(); return 0; }