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Nuklear/demo/sdl_renderer/main.c

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/* nuklear - 1.32.0 - public domain */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <limits.h>
#include <time.h>
#include <SDL2/SDL.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_RENDERER_IMPLEMENTATION
#include "../../nuklear.h"
#include "nuklear_sdl_renderer.h"
#define WINDOW_WIDTH 1200
#define WINDOW_HEIGHT 800
/* ===============================================================
*
* 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 defines */
/*#define INCLUDE_ALL */
/*#define INCLUDE_STYLE */
/*#define INCLUDE_CALCULATOR */
/*#define INCLUDE_CANVAS */
/*#define INCLUDE_OVERVIEW */
/*#define INCLUDE_NODE_EDITOR */
#ifdef INCLUDE_ALL
#define INCLUDE_STYLE
#define INCLUDE_CALCULATOR
#define INCLUDE_CANVAS
#define INCLUDE_OVERVIEW
#define INCLUDE_NODE_EDITOR
#endif
#ifdef INCLUDE_STYLE
#include "../../demo/common/style.c"
#endif
#ifdef INCLUDE_CALCULATOR
#include "../../demo/common/calculator.c"
#endif
#ifdef INCLUDE_CANVAS
#include "../../demo/common/canvas.c"
#endif
#ifdef INCLUDE_OVERVIEW
#include "../../demo/common/overview.c"
#endif
#ifdef INCLUDE_NODE_EDITOR
#include "../../demo/common/node_editor.c"
#endif
/* ===============================================================
*
* DEMO
*
* ===============================================================*/
int
main(int argc, char *argv[])
{
/* Platform */
SDL_Window *win;
SDL_Renderer *renderer;
int running = 1;
int flags = 0;
float font_scale = 1;
/* GUI */
struct nk_context *ctx;
struct nk_colorf bg;
/* SDL setup */
SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
SDL_Init(SDL_INIT_VIDEO);
win = SDL_CreateWindow("Demo",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
if (win == NULL) {
SDL_Log("Error SDL_CreateWindow %s", SDL_GetError());
exit(-1);
}
flags |= SDL_RENDERER_ACCELERATED;
flags |= SDL_RENDERER_PRESENTVSYNC;
#if 0
SDL_SetHint(SDL_HINT_RENDER_BATCHING, "1");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "software");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengl");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "software");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengles2");
#endif
renderer = SDL_CreateRenderer(win, -1, flags);
if (renderer == NULL) {
SDL_Log("Error SDL_CreateRenderer %s", SDL_GetError());
exit(-1);
}
/* scale the renderer output for High-DPI displays */
{
int render_w, render_h;
int window_w, window_h;
float scale_x, scale_y;
SDL_GetRendererOutputSize(renderer, &render_w, &render_h);
SDL_GetWindowSize(win, &window_w, &window_h);
scale_x = (float)(render_w) / (float)(window_w);
scale_y = (float)(render_h) / (float)(window_h);
SDL_RenderSetScale(renderer, scale_x, scale_y);
font_scale = scale_y;
}
/* GUI */
ctx = nk_sdl_init(win, renderer);
/* 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;
struct nk_font_config config = nk_font_config(0);
struct nk_font *font;
/* set up the font atlas and add desired font; note that font sizes are
* multiplied by font_scale to produce better results at higher DPIs */
nk_sdl_font_stash_begin(&atlas);
font = nk_font_atlas_add_default(atlas, 13 * font_scale, &config);
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/DroidSans.ttf", 14 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Roboto-Regular.ttf", 16 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/kenvector_future_thin.ttf", 13 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyClean.ttf", 12 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/ProggyTiny.ttf", 10 * font_scale, &config);*/
/*font = nk_font_atlas_add_from_file(atlas, "../../../extra_font/Cousine-Regular.ttf", 13 * font_scale, &config);*/
nk_sdl_font_stash_end();
/* this hack makes the font appear to be scaled down to the desired
* size and is only necessary when font_scale > 1 */
font->handle.height /= font_scale;
/*nk_style_load_all_cursors(ctx, atlas->cursors);*/
nk_style_set_font(ctx, &font->handle);
}
bg.r = 0.10f, bg.g = 0.18f, bg.b = 0.24f, bg.a = 1.0f;
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_sdl_handle_grab(); /* optional grabbing behavior */
nk_input_end(ctx);
/* GUI */
if (nk_begin(ctx, "Demo", nk_rect(50, 50, 230, 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, nk_rgb_cf(bg), nk_vec2(nk_widget_width(ctx),400))) {
nk_layout_row_dynamic(ctx, 120, 1);
bg = nk_color_picker(ctx, bg, NK_RGBA);
nk_layout_row_dynamic(ctx, 25, 1);
bg.r = nk_propertyf(ctx, "#R:", 0, bg.r, 1.0f, 0.01f,0.005f);
bg.g = nk_propertyf(ctx, "#G:", 0, bg.g, 1.0f, 0.01f,0.005f);
bg.b = nk_propertyf(ctx, "#B:", 0, bg.b, 1.0f, 0.01f,0.005f);
bg.a = nk_propertyf(ctx, "#A:", 0, bg.a, 1.0f, 0.01f,0.005f);
nk_combo_end(ctx);
}
}
nk_end(ctx);
/* -------------- EXAMPLES ---------------- */
#ifdef INCLUDE_CALCULATOR
calculator(ctx);
#endif
#ifdef INCLUDE_CANVAS
canvas(ctx);
#endif
#ifdef INCLUDE_OVERVIEW
overview(ctx);
#endif
#ifdef INCLUDE_NODE_EDITOR
node_editor(ctx);
#endif
/* ----------------------------------------- */
SDL_SetRenderDrawColor(renderer, bg.r * 255, bg.g * 255, bg.b * 255, bg.a * 255);
SDL_RenderClear(renderer);
nk_sdl_render(NK_ANTI_ALIASING_ON);
SDL_RenderPresent(renderer);
}
cleanup:
nk_sdl_shutdown();
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(win);
SDL_Quit();
return 0;
}
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