907 lines
34 KiB
C
907 lines
34 KiB
C
/* nuklear - v1.05 - public domain */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <string.h>
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#include <math.h>
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#include <assert.h>
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#include <time.h>
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#include <limits.h>
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#include <GL/glew.h>
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#include <GLFW/glfw3.h>
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#define NK_INCLUDE_FIXED_TYPES
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#define NK_INCLUDE_STANDARD_IO
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#define NK_INCLUDE_DEFAULT_ALLOCATOR
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#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
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#define NK_INCLUDE_FONT_BAKING
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#define NK_INCLUDE_DEFAULT_FONT
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#define NK_IMPLEMENTATION
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#include "../nuklear.h"
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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/* macros */
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#define WINDOW_WIDTH 1200
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#define WINDOW_HEIGHT 800
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#define MAX_VERTEX_MEMORY 512 * 1024
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#define MAX_ELEMENT_MEMORY 128 * 1024
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#define UNUSED(a) (void)a
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MAX(a,b) ((a) < (b) ? (b) : (a))
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#define LEN(a) (sizeof(a)/sizeof(a)[0])
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#ifdef __APPLE__
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#define NK_SHADER_VERSION "#version 150\n"
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#else
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#define NK_SHADER_VERSION "#version 300 es\n"
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#endif
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struct media {
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struct nk_font *font_14;
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struct nk_font *font_18;
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struct nk_font *font_20;
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struct nk_font *font_22;
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struct nk_image unchecked;
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struct nk_image checked;
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struct nk_image rocket;
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struct nk_image cloud;
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struct nk_image pen;
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struct nk_image play;
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struct nk_image pause;
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struct nk_image stop;
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struct nk_image prev;
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struct nk_image next;
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struct nk_image tools;
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struct nk_image dir;
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struct nk_image copy;
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struct nk_image convert;
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struct nk_image del;
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struct nk_image edit;
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struct nk_image images[9];
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struct nk_image menu[6];
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};
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/* ===============================================================
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*
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* CUSTOM WIDGET
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*
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* ===============================================================*/
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static int
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ui_piemenu(struct nk_context *ctx, struct nk_vec2 pos, float radius,
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struct nk_image *icons, int item_count)
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{
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int ret = -1;
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struct nk_rect total_space;
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struct nk_rect bounds;
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int active_item = 0;
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/* pie menu popup */
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struct nk_color border = ctx->style.window.border_color;
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struct nk_style_item background = ctx->style.window.fixed_background;
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ctx->style.window.fixed_background = nk_style_item_hide();
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ctx->style.window.border_color = nk_rgba(0,0,0,0);
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total_space = nk_window_get_content_region(ctx);
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ctx->style.window.spacing = nk_vec2(0,0);
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ctx->style.window.padding = nk_vec2(0,0);
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if (nk_popup_begin(ctx, NK_POPUP_STATIC, "piemenu", NK_WINDOW_NO_SCROLLBAR,
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nk_rect(pos.x - total_space.x - radius, pos.y - radius - total_space.y,
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2*radius,2*radius)))
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{
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int i = 0;
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struct nk_command_buffer* out = nk_window_get_canvas(ctx);
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const struct nk_input *in = &ctx->input;
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total_space = nk_window_get_content_region(ctx);
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ctx->style.window.spacing = nk_vec2(4,4);
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ctx->style.window.padding = nk_vec2(8,8);
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nk_layout_row_dynamic(ctx, total_space.h, 1);
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nk_widget(&bounds, ctx);
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/* outer circle */
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nk_fill_circle(out, bounds, nk_rgb(50,50,50));
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{
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/* circle buttons */
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float step = (2 * 3.141592654f) / (float)(MAX(1,item_count));
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float a_min = 0; float a_max = step;
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struct nk_vec2 center = nk_vec2(bounds.x + bounds.w / 2.0f, bounds.y + bounds.h / 2.0f);
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struct nk_vec2 drag = nk_vec2(in->mouse.pos.x - center.x, in->mouse.pos.y - center.y);
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float angle = (float)atan2(drag.y, drag.x);
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if (angle < -0.0f) angle += 2.0f * 3.141592654f;
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active_item = (int)(angle/step);
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for (i = 0; i < item_count; ++i) {
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struct nk_rect content;
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float rx, ry, dx, dy, a;
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nk_fill_arc(out, center.x, center.y, (bounds.w/2.0f),
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a_min, a_max, (active_item == i) ? nk_rgb(45,100,255): nk_rgb(60,60,60));
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/* separator line */
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rx = bounds.w/2.0f; ry = 0;
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dx = rx * (float)cos(a_min) - ry * (float)sin(a_min);
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dy = rx * (float)sin(a_min) + ry * (float)cos(a_min);
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nk_stroke_line(out, center.x, center.y,
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center.x + dx, center.y + dy, 1.0f, nk_rgb(50,50,50));
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/* button content */
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a = a_min + (a_max - a_min)/2.0f;
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rx = bounds.w/2.5f; ry = 0;
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content.w = 30; content.h = 30;
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content.x = center.x + ((rx * (float)cos(a) - ry * (float)sin(a)) - content.w/2.0f);
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content.y = center.y + (rx * (float)sin(a) + ry * (float)cos(a) - content.h/2.0f);
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nk_draw_image(out, content, &icons[i], nk_rgb(255,255,255));
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a_min = a_max; a_max += step;
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}
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}
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{
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/* inner circle */
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struct nk_rect inner;
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inner.x = bounds.x + bounds.w/2 - bounds.w/4;
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inner.y = bounds.y + bounds.h/2 - bounds.h/4;
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inner.w = bounds.w/2; inner.h = bounds.h/2;
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nk_fill_circle(out, inner, nk_rgb(45,45,45));
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/* active icon content */
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bounds.w = inner.w / 2.0f;
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bounds.h = inner.h / 2.0f;
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bounds.x = inner.x + inner.w/2 - bounds.w/2;
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bounds.y = inner.y + inner.h/2 - bounds.h/2;
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nk_draw_image(out, bounds, &icons[active_item], nk_rgb(255,255,255));
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}
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nk_layout_space_end(ctx);
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if (!nk_input_is_mouse_down(&ctx->input, NK_BUTTON_RIGHT)) {
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nk_popup_close(ctx);
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ret = active_item;
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}
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} else ret = -2;
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ctx->style.window.spacing = nk_vec2(4,4);
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ctx->style.window.padding = nk_vec2(8,8);
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nk_popup_end(ctx);
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ctx->style.window.fixed_background = background;
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ctx->style.window.border_color = border;
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return ret;
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}
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/* ===============================================================
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*
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* GRID
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*
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* ===============================================================*/
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static void
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grid_demo(struct nk_context *ctx, struct media *media)
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{
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static char text[3][64];
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static int text_len[3];
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static const char *items[] = {"Item 0","item 1","item 2"};
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static int selected_item = 0;
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static int check = 1;
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int i;
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nk_style_set_font(ctx, &media->font_20->handle);
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if (nk_begin(ctx, "Grid Demo", nk_rect(600, 350, 275, 250),
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NK_WINDOW_TITLE|NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|
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NK_WINDOW_NO_SCROLLBAR))
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{
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nk_style_set_font(ctx, &media->font_18->handle);
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nk_layout_row_dynamic(ctx, 30, 2);
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nk_label(ctx, "Floating point:", NK_TEXT_RIGHT);
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nk_edit_string(ctx, NK_EDIT_FIELD, text[0], &text_len[0], 64, nk_filter_float);
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nk_label(ctx, "Hexadecimal:", NK_TEXT_RIGHT);
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nk_edit_string(ctx, NK_EDIT_FIELD, text[1], &text_len[1], 64, nk_filter_hex);
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nk_label(ctx, "Binary:", NK_TEXT_RIGHT);
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nk_edit_string(ctx, NK_EDIT_FIELD, text[2], &text_len[2], 64, nk_filter_binary);
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nk_label(ctx, "Checkbox:", NK_TEXT_RIGHT);
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nk_checkbox_label(ctx, "Check me", &check);
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nk_label(ctx, "Combobox:", NK_TEXT_RIGHT);
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if (nk_combo_begin_label(ctx, items[selected_item], nk_vec2(nk_widget_width(ctx), 200))) {
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nk_layout_row_dynamic(ctx, 25, 1);
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for (i = 0; i < 3; ++i)
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if (nk_combo_item_label(ctx, items[i], NK_TEXT_LEFT))
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selected_item = i;
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nk_combo_end(ctx);
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}
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}
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nk_end(ctx);
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nk_style_set_font(ctx, &media->font_14->handle);
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}
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/* ===============================================================
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*
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* BUTTON DEMO
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*
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* ===============================================================*/
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static void
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ui_header(struct nk_context *ctx, struct media *media, const char *title)
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{
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nk_style_set_font(ctx, &media->font_18->handle);
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nk_layout_row_dynamic(ctx, 20, 1);
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nk_label(ctx, title, NK_TEXT_LEFT);
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}
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static void
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ui_widget(struct nk_context *ctx, struct media *media, float height)
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{
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static const float ratio[] = {0.15f, 0.85f};
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nk_style_set_font(ctx, &media->font_22->handle);
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nk_layout_row(ctx, NK_DYNAMIC, height, 2, ratio);
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nk_spacing(ctx, 1);
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}
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static void
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ui_widget_centered(struct nk_context *ctx, struct media *media, float height)
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{
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static const float ratio[] = {0.15f, 0.50f, 0.35f};
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nk_style_set_font(ctx, &media->font_22->handle);
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nk_layout_row(ctx, NK_DYNAMIC, height, 3, ratio);
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nk_spacing(ctx, 1);
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}
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static void
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button_demo(struct nk_context *ctx, struct media *media)
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{
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static int option = 1;
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static int toggle0 = 1;
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static int toggle1 = 0;
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static int toggle2 = 1;
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nk_style_set_font(ctx, &media->font_20->handle);
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nk_begin(ctx, "Button Demo", nk_rect(50,50,255,610),
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NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_TITLE);
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/*------------------------------------------------
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* MENU
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*------------------------------------------------*/
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nk_menubar_begin(ctx);
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{
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/* toolbar */
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nk_layout_row_static(ctx, 40, 40, 4);
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if (nk_menu_begin_image(ctx, "Music", media->play, nk_vec2(110,120)))
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{
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/* settings */
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nk_layout_row_dynamic(ctx, 25, 1);
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nk_menu_item_image_label(ctx, media->play, "Play", NK_TEXT_RIGHT);
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nk_menu_item_image_label(ctx, media->stop, "Stop", NK_TEXT_RIGHT);
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nk_menu_item_image_label(ctx, media->pause, "Pause", NK_TEXT_RIGHT);
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nk_menu_item_image_label(ctx, media->next, "Next", NK_TEXT_RIGHT);
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nk_menu_item_image_label(ctx, media->prev, "Prev", NK_TEXT_RIGHT);
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nk_menu_end(ctx);
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}
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nk_button_image(ctx, media->tools);
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nk_button_image(ctx, media->cloud);
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nk_button_image(ctx, media->pen);
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}
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nk_menubar_end(ctx);
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/*------------------------------------------------
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* BUTTON
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*------------------------------------------------*/
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ui_header(ctx, media, "Push buttons");
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ui_widget(ctx, media, 35);
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if (nk_button_label(ctx, "Push me"))
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fprintf(stdout, "pushed!\n");
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ui_widget(ctx, media, 35);
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if (nk_button_image_label(ctx, media->rocket, "Styled", NK_TEXT_CENTERED))
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fprintf(stdout, "rocket!\n");
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/*------------------------------------------------
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* REPEATER
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*------------------------------------------------*/
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ui_header(ctx, media, "Repeater");
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ui_widget(ctx, media, 35);
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if (nk_button_label(ctx, "Press me"))
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fprintf(stdout, "pressed!\n");
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/*------------------------------------------------
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* TOGGLE
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*------------------------------------------------*/
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ui_header(ctx, media, "Toggle buttons");
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ui_widget(ctx, media, 35);
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if (nk_button_image_label(ctx, (toggle0) ? media->checked: media->unchecked, "Toggle", NK_TEXT_LEFT))
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toggle0 = !toggle0;
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ui_widget(ctx, media, 35);
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if (nk_button_image_label(ctx, (toggle1) ? media->checked: media->unchecked, "Toggle", NK_TEXT_LEFT))
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toggle1 = !toggle1;
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ui_widget(ctx, media, 35);
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if (nk_button_image_label(ctx, (toggle2) ? media->checked: media->unchecked, "Toggle", NK_TEXT_LEFT))
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toggle2 = !toggle2;
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/*------------------------------------------------
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* RADIO
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*------------------------------------------------*/
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ui_header(ctx, media, "Radio buttons");
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ui_widget(ctx, media, 35);
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if (nk_button_symbol_label(ctx, (option == 0)?NK_SYMBOL_CIRCLE_OUTLINE:NK_SYMBOL_CIRCLE_SOLID, "Select", NK_TEXT_LEFT))
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option = 0;
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ui_widget(ctx, media, 35);
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if (nk_button_symbol_label(ctx, (option == 1)?NK_SYMBOL_CIRCLE_OUTLINE:NK_SYMBOL_CIRCLE_SOLID, "Select", NK_TEXT_LEFT))
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option = 1;
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ui_widget(ctx, media, 35);
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if (nk_button_symbol_label(ctx, (option == 2)?NK_SYMBOL_CIRCLE_OUTLINE:NK_SYMBOL_CIRCLE_SOLID, "Select", NK_TEXT_LEFT))
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option = 2;
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/*------------------------------------------------
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* CONTEXTUAL
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*------------------------------------------------*/
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nk_style_set_font(ctx, &media->font_18->handle);
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if (nk_contextual_begin(ctx, NK_WINDOW_NO_SCROLLBAR, nk_vec2(150, 300), nk_window_get_bounds(ctx))) {
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nk_layout_row_dynamic(ctx, 30, 1);
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if (nk_contextual_item_image_label(ctx, media->copy, "Clone", NK_TEXT_RIGHT))
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fprintf(stdout, "pressed clone!\n");
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if (nk_contextual_item_image_label(ctx, media->del, "Delete", NK_TEXT_RIGHT))
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fprintf(stdout, "pressed delete!\n");
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if (nk_contextual_item_image_label(ctx, media->convert, "Convert", NK_TEXT_RIGHT))
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fprintf(stdout, "pressed convert!\n");
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if (nk_contextual_item_image_label(ctx, media->edit, "Edit", NK_TEXT_RIGHT))
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fprintf(stdout, "pressed edit!\n");
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nk_contextual_end(ctx);
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}
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nk_style_set_font(ctx, &media->font_14->handle);
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nk_end(ctx);
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}
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/* ===============================================================
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*
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* BASIC DEMO
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*
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* ===============================================================*/
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static void
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basic_demo(struct nk_context *ctx, struct media *media)
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{
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static int image_active;
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static int check0 = 1;
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static int check1 = 0;
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static size_t prog = 80;
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static int selected_item = 0;
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static int selected_image = 3;
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static int selected_icon = 0;
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static const char *items[] = {"Item 0","item 1","item 2"};
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static int piemenu_active = 0;
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static struct nk_vec2 piemenu_pos;
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int i = 0;
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nk_style_set_font(ctx, &media->font_20->handle);
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nk_begin(ctx, "Basic Demo", nk_rect(320, 50, 275, 610),
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NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_TITLE);
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/*------------------------------------------------
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* POPUP BUTTON
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*------------------------------------------------*/
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ui_header(ctx, media, "Popup & Scrollbar & Images");
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ui_widget(ctx, media, 35);
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if (nk_button_image_label(ctx, media->dir, "Images", NK_TEXT_CENTERED))
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image_active = !image_active;
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/*------------------------------------------------
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* SELECTED IMAGE
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*------------------------------------------------*/
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ui_header(ctx, media, "Selected Image");
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ui_widget_centered(ctx, media, 100);
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nk_image(ctx, media->images[selected_image]);
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/*------------------------------------------------
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* IMAGE POPUP
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*------------------------------------------------*/
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if (image_active) {
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struct nk_panel popup;
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if (nk_popup_begin(ctx, NK_POPUP_STATIC, "Image Popup", 0, nk_rect(265, 0, 320, 220))) {
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nk_layout_row_static(ctx, 82, 82, 3);
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for (i = 0; i < 9; ++i) {
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if (nk_button_image(ctx, media->images[i])) {
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selected_image = i;
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image_active = 0;
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nk_popup_close(ctx);
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}
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}
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nk_popup_end(ctx);
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}
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}
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/*------------------------------------------------
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* COMBOBOX
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*------------------------------------------------*/
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ui_header(ctx, media, "Combo box");
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ui_widget(ctx, media, 40);
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if (nk_combo_begin_label(ctx, items[selected_item], nk_vec2(nk_widget_width(ctx), 200))) {
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nk_layout_row_dynamic(ctx, 35, 1);
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for (i = 0; i < 3; ++i)
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if (nk_combo_item_label(ctx, items[i], NK_TEXT_LEFT))
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selected_item = i;
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nk_combo_end(ctx);
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}
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ui_widget(ctx, media, 40);
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if (nk_combo_begin_image_label(ctx, items[selected_icon], media->images[selected_icon], nk_vec2(nk_widget_width(ctx), 200))) {
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nk_layout_row_dynamic(ctx, 35, 1);
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for (i = 0; i < 3; ++i)
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if (nk_combo_item_image_label(ctx, media->images[i], items[i], NK_TEXT_RIGHT))
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selected_icon = i;
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nk_combo_end(ctx);
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}
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/*------------------------------------------------
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* CHECKBOX
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*------------------------------------------------*/
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ui_header(ctx, media, "Checkbox");
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ui_widget(ctx, media, 30);
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nk_checkbox_label(ctx, "Flag 1", &check0);
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ui_widget(ctx, media, 30);
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nk_checkbox_label(ctx, "Flag 2", &check1);
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/*------------------------------------------------
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* PROGRESSBAR
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*------------------------------------------------*/
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ui_header(ctx, media, "Progressbar");
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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);
|
|
nk_buffer_clear(&dev->cmds);
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|