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Diffstat (limited to 'nuklear/demo/sdl_opengl2/main.c')
| -rw-r--r-- | nuklear/demo/sdl_opengl2/main.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/nuklear/demo/sdl_opengl2/main.c b/nuklear/demo/sdl_opengl2/main.c new file mode 100644 index 0000000..0d96551 --- /dev/null +++ b/nuklear/demo/sdl_opengl2/main.c @@ -0,0 +1,181 @@ +/* nuklear - v1.17 - 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 <limits.h> +#include <time.h> + +#include <SDL2/SDL.h> +#include <SDL2/SDL_opengl.h> + +#define NK_INCLUDE_FIXED_TYPES +#define NK_INCLUDE_STANDARD_IO +#define NK_INCLUDE_STANDARD_VARARGS +#define NK_INCLUDE_DEFAULT_ALLOCATOR +#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT +#define NK_INCLUDE_FONT_BAKING +#define NK_INCLUDE_DEFAULT_FONT +#define NK_IMPLEMENTATION +#define NK_SDL_GL2_IMPLEMENTATION +#include "../../nuklear.h" +#include "nuklear_sdl_gl2.h" + +#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]) + +/* =============================================================== + * + * EXAMPLE + * + * ===============================================================*/ +/* This are some code examples to provide a small overview of what can be + * done with this library. To try out an example uncomment the include + * and the corresponding function. */ +/*#include "../style.c"*/ +/*#include "../calculator.c"*/ +/*#include "../overview.c"*/ +/*#include "../node_editor.c"*/ + +/* =============================================================== + * + * DEMO + * + * ===============================================================*/ +int +main(int argc, char* argv[]) +{ + /* Platform */ + SDL_Window *win; + SDL_GLContext glContext; + struct nk_color background; + int win_width, win_height; + int running = 1; + + /* GUI */ + struct nk_context *ctx; + + /* SDL setup */ + SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0"); + SDL_Init(SDL_INIT_VIDEO); + SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); + SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24); + SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8); + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2); + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2); + win = SDL_CreateWindow("Demo", + SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, + WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI); + glContext = SDL_GL_CreateContext(win); + SDL_GetWindowSize(win, &win_width, &win_height); + + /* GUI */ + ctx = nk_sdl_init(win); + /* Load Fonts: if none of these are loaded a default font will be used */ + /* Load Cursor: if you uncomment cursor loading please hide the cursor */ + {struct nk_font_atlas *atlas; + nk_sdl_font_stash_begin(&atlas); + /*struct nk_font *droid = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14, 0);*/ + /*struct nk_font *roboto = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 16, 0);*/ + /*struct nk_font *future = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13, 0);*/ + /*struct nk_font *clean = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12, 0);*/ + /*struct nk_font *tiny = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10, 0);*/ + /*struct nk_font *cousine = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13, 0);*/ + nk_sdl_font_stash_end(); + /*nk_style_load_all_cursors(ctx, atlas->cursors);*/ + /*nk_style_set_font(ctx, &roboto->handle)*/;} + + /* style.c */ + /*set_style(ctx, THEME_WHITE);*/ + /*set_style(ctx, THEME_RED);*/ + /*set_style(ctx, THEME_BLUE);*/ + /*set_style(ctx, THEME_DARK);*/ + + background = nk_rgb(28,48,62); + while (running) + { + /* Input */ + SDL_Event evt; + nk_input_begin(ctx); + while (SDL_PollEvent(&evt)) { + if (evt.type == SDL_QUIT) goto cleanup; + nk_sdl_handle_event(&evt); + } + nk_input_end(ctx); + + /* GUI */ + if (nk_begin(ctx, "Demo", nk_rect(50, 50, 210, 250), + NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE| + NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE)) + { + enum {EASY, HARD}; + static int op = EASY; + static int property = 20; + + nk_layout_row_static(ctx, 30, 80, 1); + if (nk_button_label(ctx, "button")) + fprintf(stdout, "button pressed\n"); + nk_layout_row_dynamic(ctx, 30, 2); + if (nk_option_label(ctx, "easy", op == EASY)) op = EASY; + if (nk_option_label(ctx, "hard", op == HARD)) op = HARD; + nk_layout_row_dynamic(ctx, 25, 1); + nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1); + + nk_layout_row_dynamic(ctx, 20, 1); + nk_label(ctx, "background:", NK_TEXT_LEFT); + nk_layout_row_dynamic(ctx, 25, 1); + if (nk_combo_begin_color(ctx, background, nk_vec2(nk_widget_width(ctx),400))) { + nk_layout_row_dynamic(ctx, 120, 1); + background = nk_color_picker(ctx, background, NK_RGBA); + nk_layout_row_dynamic(ctx, 25, 1); + background.r = (nk_byte)nk_propertyi(ctx, "#R:", 0, background.r, 255, 1,1); + background.g = (nk_byte)nk_propertyi(ctx, "#G:", 0, background.g, 255, 1,1); + background.b = (nk_byte)nk_propertyi(ctx, "#B:", 0, background.b, 255, 1,1); + background.a = (nk_byte)nk_propertyi(ctx, "#A:", 0, background.a, 255, 1,1); + nk_combo_end(ctx); + } + } + nk_end(ctx); + + /* -------------- EXAMPLES ---------------- */ + /*calculator(ctx);*/ + /*overview(ctx);*/ + /*node_editor(ctx);*/ + /* ----------------------------------------- */ + + /* Draw */ + {float bg[4]; + nk_color_fv(bg, background); + SDL_GetWindowSize(win, &win_width, &win_height); + glViewport(0, 0, win_width, win_height); + glClear(GL_COLOR_BUFFER_BIT); + glClearColor(bg[0], bg[1], bg[2], bg[3]); + /* IMPORTANT: `nk_sdl_render` modifies some global OpenGL state + * with blending, scissor, face culling, depth test and viewport and + * defaults everything back into a default state. + * Make sure to either a.) save and restore or b.) reset your own state after + * rendering the UI. */ + nk_sdl_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_MEMORY, MAX_ELEMENT_MEMORY); + SDL_GL_SwapWindow(win);} + } + +cleanup: + nk_sdl_shutdown(); + SDL_GL_DeleteContext(glContext); + SDL_DestroyWindow(win); + SDL_Quit(); + return 0; +} + |