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-rw-r--r--subprojects/nk_pugl/nuklear/example/extended.c906
1 files changed, 906 insertions, 0 deletions
diff --git a/subprojects/nk_pugl/nuklear/example/extended.c b/subprojects/nk_pugl/nuklear/example/extended.c
new file mode 100644
index 0000000..003adf3
--- /dev/null
+++ b/subprojects/nk_pugl/nuklear/example/extended.c
@@ -0,0 +1,906 @@
+/* nuklear - v1.05 - public domain */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include <math.h>
+#include <time.h>
+#include <limits.h>
+
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+
+#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 media {
+ struct nk_font *font_14;
+ struct nk_font *font_18;
+ struct nk_font *font_20;
+ struct nk_font *font_22;
+
+ 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_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);
+ ctx->style.window.spacing = nk_vec2(0,0);
+ ctx->style.window.padding = nk_vec2(0,0);
+
+ if (nk_popup_begin(ctx, 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)))
+ {
+ int i = 0;
+ struct nk_command_buffer* out = nk_window_get_canvas(ctx);
+ const struct nk_input *in = &ctx->input;
+
+ total_space = nk_window_get_content_region(ctx);
+ ctx->style.window.spacing = nk_vec2(4,4);
+ ctx->style.window.padding = nk_vec2(8,8);
+ nk_layout_row_dynamic(ctx, total_space.h, 1);
+ 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], nk_rgb(255,255,255));
+ 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_rgb(255,255,255));
+ }
+ nk_layout_space_end(ctx);
+ if (!nk_input_is_mouse_down(&ctx->input, NK_BUTTON_RIGHT)) {
+ nk_popup_close(ctx);
+ ret = active_item;
+ }
+ } else ret = -2;
+ ctx->style.window.spacing = nk_vec2(4,4);
+ ctx->style.window.padding = nk_vec2(8,8);
+ nk_popup_end(ctx);
+
+ ctx->style.window.fixed_background = background;
+ ctx->style.window.border_color = border;
+ return ret;
+}
+
+/* ===============================================================
+ *
+ * GRID
+ *
+ * ===============================================================*/
+static void
+grid_demo(struct nk_context *ctx, struct media *media)
+{
+ 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;
+
+ int i;
+ nk_style_set_font(ctx, &media->font_20->handle);
+ if (nk_begin(ctx, "Grid Demo", nk_rect(600, 350, 275, 250),
+ NK_WINDOW_TITLE|NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|
+ NK_WINDOW_NO_SCROLLBAR))
+ {
+ nk_style_set_font(ctx, &media->font_18->handle);
+ 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, "Hexadecimal:", 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, items[selected_item], nk_vec2(nk_widget_width(ctx), 200))) {
+ nk_layout_row_dynamic(ctx, 25, 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);
+ nk_style_set_font(ctx, &media->font_14->handle);
+}
+
+/* ===============================================================
+ *
+ * BUTTON DEMO
+ *
+ * ===============================================================*/
+static void
+ui_header(struct nk_context *ctx, struct media *media, const char *title)
+{
+ nk_style_set_font(ctx, &media->font_18->handle);
+ nk_layout_row_dynamic(ctx, 20, 1);
+ nk_label(ctx, title, NK_TEXT_LEFT);
+}
+
+static void
+ui_widget(struct nk_context *ctx, struct media *media, float height)
+{
+ static const float ratio[] = {0.15f, 0.85f};
+ nk_style_set_font(ctx, &media->font_22->handle);
+ nk_layout_row(ctx, NK_DYNAMIC, height, 2, ratio);
+ nk_spacing(ctx, 1);
+}
+
+static void
+ui_widget_centered(struct nk_context *ctx, struct media *media, float height)
+{
+ static const float ratio[] = {0.15f, 0.50f, 0.35f};
+ nk_style_set_font(ctx, &media->font_22->handle);
+ nk_layout_row(ctx, NK_DYNAMIC, height, 3, ratio);
+ nk_spacing(ctx, 1);
+}
+
+static void
+button_demo(struct nk_context *ctx, struct media *media)
+{
+ static int option = 1;
+ static int toggle0 = 1;
+ static int toggle1 = 0;
+ static int toggle2 = 1;
+
+ nk_style_set_font(ctx, &media->font_20->handle);
+ nk_begin(ctx, "Button Demo", nk_rect(50,50,255,610),
+ NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_TITLE);
+
+ /*------------------------------------------------
+ * MENU
+ *------------------------------------------------*/
+ nk_menubar_begin(ctx);
+ {
+ /* toolbar */
+ nk_layout_row_static(ctx, 40, 40, 4);
+ if (nk_menu_begin_image(ctx, "Music", media->play, nk_vec2(110,120)))
+ {
+ /* settings */
+ nk_layout_row_dynamic(ctx, 25, 1);
+ nk_menu_item_image_label(ctx, media->play, "Play", NK_TEXT_RIGHT);
+ nk_menu_item_image_label(ctx, media->stop, "Stop", NK_TEXT_RIGHT);
+ nk_menu_item_image_label(ctx, media->pause, "Pause", NK_TEXT_RIGHT);
+ nk_menu_item_image_label(ctx, media->next, "Next", NK_TEXT_RIGHT);
+ nk_menu_item_image_label(ctx, media->prev, "Prev", NK_TEXT_RIGHT);
+ nk_menu_end(ctx);
+ }
+ nk_button_image(ctx, media->tools);
+ nk_button_image(ctx, media->cloud);
+ nk_button_image(ctx, media->pen);
+ }
+ nk_menubar_end(ctx);
+
+ /*------------------------------------------------
+ * BUTTON
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Push buttons");
+ ui_widget(ctx, media, 35);
+ if (nk_button_label(ctx, "Push me"))
+ fprintf(stdout, "pushed!\n");
+ ui_widget(ctx, media, 35);
+ if (nk_button_image_label(ctx, media->rocket, "Styled", NK_TEXT_CENTERED))
+ fprintf(stdout, "rocket!\n");
+
+ /*------------------------------------------------
+ * REPEATER
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Repeater");
+ ui_widget(ctx, media, 35);
+ if (nk_button_label(ctx, "Press me"))
+ fprintf(stdout, "pressed!\n");
+
+ /*------------------------------------------------
+ * TOGGLE
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Toggle buttons");
+ ui_widget(ctx, media, 35);
+ if (nk_button_image_label(ctx, (toggle0) ? media->checked: media->unchecked, "Toggle", NK_TEXT_LEFT))
+ toggle0 = !toggle0;
+
+ ui_widget(ctx, media, 35);
+ if (nk_button_image_label(ctx, (toggle1) ? media->checked: media->unchecked, "Toggle", NK_TEXT_LEFT))
+ toggle1 = !toggle1;
+
+ ui_widget(ctx, media, 35);
+ if (nk_button_image_label(ctx, (toggle2) ? media->checked: media->unchecked, "Toggle", NK_TEXT_LEFT))
+ toggle2 = !toggle2;
+
+ /*------------------------------------------------
+ * RADIO
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Radio buttons");
+ ui_widget(ctx, media, 35);
+ if (nk_button_symbol_label(ctx, (option == 0)?NK_SYMBOL_CIRCLE_OUTLINE:NK_SYMBOL_CIRCLE_SOLID, "Select", NK_TEXT_LEFT))
+ option = 0;
+ ui_widget(ctx, media, 35);
+ if (nk_button_symbol_label(ctx, (option == 1)?NK_SYMBOL_CIRCLE_OUTLINE:NK_SYMBOL_CIRCLE_SOLID, "Select", NK_TEXT_LEFT))
+ option = 1;
+ ui_widget(ctx, media, 35);
+ if (nk_button_symbol_label(ctx, (option == 2)?NK_SYMBOL_CIRCLE_OUTLINE:NK_SYMBOL_CIRCLE_SOLID, "Select", NK_TEXT_LEFT))
+ option = 2;
+
+ /*------------------------------------------------
+ * CONTEXTUAL
+ *------------------------------------------------*/
+ nk_style_set_font(ctx, &media->font_18->handle);
+ if (nk_contextual_begin(ctx, NK_WINDOW_NO_SCROLLBAR, nk_vec2(150, 300), nk_window_get_bounds(ctx))) {
+ nk_layout_row_dynamic(ctx, 30, 1);
+ if (nk_contextual_item_image_label(ctx, media->copy, "Clone", NK_TEXT_RIGHT))
+ fprintf(stdout, "pressed clone!\n");
+ if (nk_contextual_item_image_label(ctx, media->del, "Delete", NK_TEXT_RIGHT))
+ fprintf(stdout, "pressed delete!\n");
+ if (nk_contextual_item_image_label(ctx, media->convert, "Convert", NK_TEXT_RIGHT))
+ fprintf(stdout, "pressed convert!\n");
+ if (nk_contextual_item_image_label(ctx, media->edit, "Edit", NK_TEXT_RIGHT))
+ fprintf(stdout, "pressed edit!\n");
+ nk_contextual_end(ctx);
+ }
+ nk_style_set_font(ctx, &media->font_14->handle);
+ nk_end(ctx);
+}
+
+/* ===============================================================
+ *
+ * BASIC DEMO
+ *
+ * ===============================================================*/
+static void
+basic_demo(struct nk_context *ctx, struct media *media)
+{
+ 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;
+ nk_style_set_font(ctx, &media->font_20->handle);
+ nk_begin(ctx, "Basic Demo", nk_rect(320, 50, 275, 610),
+ NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_TITLE);
+
+ /*------------------------------------------------
+ * POPUP BUTTON
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Popup & Scrollbar & Images");
+ ui_widget(ctx, media, 35);
+ if (nk_button_image_label(ctx, media->dir, "Images", NK_TEXT_CENTERED))
+ image_active = !image_active;
+
+ /*------------------------------------------------
+ * SELECTED IMAGE
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Selected Image");
+ ui_widget_centered(ctx, media, 100);
+ nk_image(ctx, media->images[selected_image]);
+
+ /*------------------------------------------------
+ * IMAGE POPUP
+ *------------------------------------------------*/
+ if (image_active) {
+ struct nk_panel popup;
+ if (nk_popup_begin(ctx, 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, media->images[i])) {
+ selected_image = i;
+ image_active = 0;
+ nk_popup_close(ctx);
+ }
+ }
+ nk_popup_end(ctx);
+ }
+ }
+ /*------------------------------------------------
+ * COMBOBOX
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Combo box");
+ ui_widget(ctx, media, 40);
+ if (nk_combo_begin_label(ctx, items[selected_item], nk_vec2(nk_widget_width(ctx), 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, media, 40);
+ if (nk_combo_begin_image_label(ctx, items[selected_icon], media->images[selected_icon], nk_vec2(nk_widget_width(ctx), 200))) {
+ nk_layout_row_dynamic(ctx, 35, 1);
+ for (i = 0; i < 3; ++i)
+ if (nk_combo_item_image_label(ctx, media->images[i], items[i], NK_TEXT_RIGHT))
+ selected_icon = i;
+ nk_combo_end(ctx);
+ }
+
+ /*------------------------------------------------
+ * CHECKBOX
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Checkbox");
+ ui_widget(ctx, media, 30);
+ nk_checkbox_label(ctx, "Flag 1", &check0);
+ ui_widget(ctx, media, 30);
+ nk_checkbox_label(ctx, "Flag 2", &check1);
+
+ /*------------------------------------------------
+ * PROGRESSBAR
+ *------------------------------------------------*/
+ ui_header(ctx, media, "Progressbar");
+ ui_widget(ctx, media, 35);
+ nk_progress(ctx, &prog, 100, nk_true);
+
+ /*------------------------------------------------
+ * PIEMENU
+ *------------------------------------------------*/
+ if (nk_input_is_mouse_click_down_in_rect(&ctx->input, NK_BUTTON_RIGHT,
+ nk_window_get_bounds(ctx),nk_true)){
+ piemenu_pos = ctx->input.mouse.pos;
+ piemenu_active = 1;
+ }
+
+ if (piemenu_active) {
+ int ret = ui_piemenu(ctx, piemenu_pos, 140, &media->menu[0], 6);
+ if (ret == -2) piemenu_active = 0;
+ if (ret != -1) {
+ fprintf(stdout, "piemenu selected: %d\n", ret);
+ piemenu_active = 0;
+ }
+ }
+ nk_style_set_font(ctx, &media->font_14->handle);
+ nk_end(ctx);
+}
+
+/* ===============================================================
+ *
+ * DEVICE
+ *
+ * ===============================================================*/
+struct nk_glfw_vertex {
+ float position[2];
+ float uv[2];
+ nk_byte col[4];
+};
+
+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_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);
+
+ 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,
+ struct nk_vec2 scale, enum nk_anti_aliasing AA)
+{
+ 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;
+
+ /* 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 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 */
+ {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 * scale.x),
+ (GLint)((height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h)) * scale.y),
+ (GLint)(cmd->clip_rect.w * scale.x),
+ (GLint)(cmd->clip_rect.h * scale.y));
+ glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
+ offset += cmd->elem_count;
+ }
+ nk_clear(ctx);
+ }
+
+ /* default OpenGL state */
+ glUseProgram(0);
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+ glBindVertexArray(0);
+ glDisable(GL_BLEND);
+ 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), nk_vec2(0, (float)yoff));}
+
+int main(int argc, char *argv[])
+{
+ /* Platform */
+ static GLFWwindow *win;
+ int width = 0, height = 0;
+ int display_width=0, display_height=0;
+
+ /* GUI */
+ struct device device;
+ struct nk_font_atlas atlas;
+ struct media media;
+ 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);
+ glfwGetWindowSize(win, &width, &height);
+ glfwGetFramebufferSize(win, &display_width, &display_height);
+
+ /* 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;
+ struct nk_font_config cfg = nk_font_config(0);
+ cfg.oversample_h = 3; cfg.oversample_v = 2;
+ /* Loading one font with different heights is only required if you want higher
+ * quality text otherwise you can just set the font height directly
+ * e.g.: ctx->style.font.height = 20. */
+ nk_font_atlas_init_default(&atlas);
+ nk_font_atlas_begin(&atlas);
+ media.font_14 = nk_font_atlas_add_from_file(&atlas, "../../extra_font/Roboto-Regular.ttf", 14.0f, &cfg);
+ media.font_18 = nk_font_atlas_add_from_file(&atlas, "../../extra_font/Roboto-Regular.ttf", 18.0f, &cfg);
+ media.font_20 = nk_font_atlas_add_from_file(&atlas, "../../extra_font/Roboto-Regular.ttf", 20.0f, &cfg);
+ media.font_22 = nk_font_atlas_add_from_file(&atlas, "../../extra_font/Roboto-Regular.ttf", 22.0f, &cfg);
+ 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, &media.font_14->handle);}
+
+ /* icons */
+ glEnable(GL_TEXTURE_2D);
+ media.unchecked = icon_load("../icon/unchecked.png");
+ media.checked = icon_load("../icon/checked.png");
+ media.rocket = icon_load("../icon/rocket.png");
+ media.cloud = icon_load("../icon/cloud.png");
+ media.pen = icon_load("../icon/pen.png");
+ media.play = icon_load("../icon/play.png");
+ media.pause = icon_load("../icon/pause.png");
+ media.stop = icon_load("../icon/stop.png");
+ media.next = icon_load("../icon/next.png");
+ media.prev = icon_load("../icon/prev.png");
+ media.tools = icon_load("../icon/tools.png");
+ media.dir = icon_load("../icon/directory.png");
+ media.copy = icon_load("../icon/copy.png");
+ media.convert = icon_load("../icon/export.png");
+ media.del = icon_load("../icon/delete.png");
+ media.edit = icon_load("../icon/edit.png");
+ media.menu[0] = icon_load("../icon/home.png");
+ media.menu[1] = icon_load("../icon/phone.png");
+ media.menu[2] = icon_load("../icon/plane.png");
+ media.menu[3] = icon_load("../icon/wifi.png");
+ media.menu[4] = icon_load("../icon/settings.png");
+ media.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));
+ media.images[i] = icon_load(buffer);
+ }}
+
+ while (!glfwWindowShouldClose(win))
+ {
+ /* High DPI displays */
+ struct nk_vec2 scale;
+ glfwGetWindowSize(win, &width, &height);
+ glfwGetFramebufferSize(win, &display_width, &display_height);
+ scale.x = (float)display_width/(float)width;
+ scale.y = (float)display_height/(float)height;
+
+ /* 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) == 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_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, &media);
+ button_demo(&ctx, &media);
+ grid_demo(&ctx, &media);
+
+ /* Draw */
+ glViewport(0, 0, display_width, display_height);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glClearColor(0.3f, 0.3f, 0.3f, 1.0f);
+ device_draw(&device, &ctx, width, height, scale, NK_ANTI_ALIASING_ON);
+ glfwSwapBuffers(win);
+ }
+
+ glDeleteTextures(1,(const GLuint*)&media.unchecked.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.checked.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.rocket.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.cloud.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.pen.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.play.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.pause.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.stop.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.next.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.prev.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.tools.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.dir.handle.id);
+ glDeleteTextures(1,(const GLuint*)&media.del.handle.id);
+
+ nk_font_atlas_clear(&atlas);
+ nk_free(&ctx);
+
+ device_shutdown(&device);
+ glfwTerminate();
+ return 0;
+}
+