Merge pull request #534 from DeXP/gles2
OpenGL ES2.0: Emscripten support
This commit is contained in:
Micha Mettke
GitHub
commit
056af25e27
@ -9,12 +9,17 @@ OBJ = $(SRC:.c=.o)
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UNAME_S := $(shell uname -s)
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UNAME_S := $(shell uname -s)
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ifeq ($(UNAME_S),Darwin)
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ifeq ($(UNAME_S),Darwin)
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LIBS = -lSDL2 -framework OpenGLES -lm -lGLEW
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LIBS = -lSDL2 -framework OpenGLES -lm
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else
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else
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LIBS = -lSDL2 -lGLESv2 -lm -lGLU -lGLEW
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LIBS = -lSDL2 -lGLESv2 -lm
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endif
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endif
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$(BIN):
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$(BIN): prepare
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$(CC) $(SRC) $(CFLAGS) -o bin/$(BIN) $(LIBS)
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web: prepare
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emcc $(SRC) -Os -s USE_SDL=2 -o bin/index.html
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prepare:
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@mkdir -p bin
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@mkdir -p bin
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rm -f bin/$(BIN) $(OBJS)
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rm -f bin/$(BIN) $(OBJS)
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$(CC) $(SRC) $(CFLAGS) -o bin/$(BIN) $(LIBS)
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@ -10,10 +10,6 @@
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#include <limits.h>
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#include <limits.h>
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#include <time.h>
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#include <time.h>
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#include <GL/glew.h>
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_opengles2.h>
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#define NK_INCLUDE_FIXED_TYPES
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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_STANDARD_IO
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#define NK_INCLUDE_STANDARD_VARARGS
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#define NK_INCLUDE_STANDARD_VARARGS
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@ -55,19 +51,96 @@
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* DEMO
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* DEMO
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*
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*
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* ===============================================================*/
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* ===============================================================*/
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/* Platform */
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SDL_Window *win;
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int running = nk_true;
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void
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MainLoop(void* loopArg){
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struct nk_context *ctx = (struct nk_context *)loopArg;
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/* Input */
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SDL_Event evt;
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nk_input_begin(ctx);
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while (SDL_PollEvent(&evt)) {
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if (evt.type == SDL_QUIT) running = nk_false;
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nk_sdl_handle_event(&evt);
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}
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nk_input_end(ctx);
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/* GUI */
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if (nk_begin(ctx, "Demo", nk_rect(50, 50, 200, 200),
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NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
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NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
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{
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nk_menubar_begin(ctx);
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nk_layout_row_begin(ctx, NK_STATIC, 25, 2);
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nk_layout_row_push(ctx, 45);
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if (nk_menu_begin_label(ctx, "FILE", NK_TEXT_LEFT, nk_vec2(120, 200))) {
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nk_layout_row_dynamic(ctx, 30, 1);
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nk_menu_item_label(ctx, "OPEN", NK_TEXT_LEFT);
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nk_menu_item_label(ctx, "CLOSE", NK_TEXT_LEFT);
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nk_menu_end(ctx);
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}
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nk_layout_row_push(ctx, 45);
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if (nk_menu_begin_label(ctx, "EDIT", NK_TEXT_LEFT, nk_vec2(120, 200))) {
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nk_layout_row_dynamic(ctx, 30, 1);
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nk_menu_item_label(ctx, "COPY", NK_TEXT_LEFT);
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nk_menu_item_label(ctx, "CUT", NK_TEXT_LEFT);
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nk_menu_item_label(ctx, "PASTE", NK_TEXT_LEFT);
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nk_menu_end(ctx);
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}
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nk_layout_row_end(ctx);
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nk_menubar_end(ctx);
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enum {EASY, HARD};
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static int op = EASY;
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static int property = 20;
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nk_layout_row_static(ctx, 30, 80, 1);
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if (nk_button_label(ctx, "button"))
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fprintf(stdout, "button pressed\n");
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nk_layout_row_dynamic(ctx, 30, 2);
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if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
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if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
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nk_layout_row_dynamic(ctx, 25, 1);
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nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
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}
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nk_end(ctx);
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/* -------------- EXAMPLES ---------------- */
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/*calculator(ctx);*/
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/*overview(ctx);*/
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/*node_editor(ctx);*/
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/* ----------------------------------------- */
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/* Draw */
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{float bg[4];
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int win_width, win_height;
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nk_color_fv(bg, nk_rgb(28,48,62));
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SDL_GetWindowSize(win, &win_width, &win_height);
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glViewport(0, 0, win_width, win_height);
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glClear(GL_COLOR_BUFFER_BIT);
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glClearColor(bg[0], bg[1], bg[2], bg[3]);
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/* IMPORTANT: `nk_sdl_render` modifies some global OpenGL state
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* with blending, scissor, face culling, depth test and viewport and
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* defaults everything back into a default state.
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* Make sure to either a.) save and restore or b.) reset your own state after
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* rendering the UI. */
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nk_sdl_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_MEMORY, MAX_ELEMENT_MEMORY);
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SDL_GL_SwapWindow(win);}
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}
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int
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int
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main(int argc, char* argv[])
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main(int argc, char* argv[])
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{
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{
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/* Platform */
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SDL_Window *win;
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SDL_GLContext glContext;
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struct nk_color background;
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int win_width, win_height;
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int running = 1;
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/* GUI */
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/* GUI */
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struct nk_context *ctx;
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struct nk_context *ctx;
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SDL_GLContext glContext;
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/* SDL setup */
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/* SDL setup */
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SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
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SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
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/*SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_EVENTS); // - do NOT init SDL on GL ES 2 */
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/*SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_EVENTS); // - do NOT init SDL on GL ES 2 */
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@ -80,15 +153,9 @@ main(int argc, char* argv[])
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
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WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
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glContext = SDL_GL_CreateContext(win);
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glContext = SDL_GL_CreateContext(win);
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SDL_GetWindowSize(win, &win_width, &win_height);
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/* OpenGL setup */
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/* OpenGL setup */
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glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
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glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
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glewExperimental = 1;
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if (glewInit() != GLEW_OK) {
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fprintf(stderr, "Failed to setup GLEW\n");
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exit(1);
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}
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ctx = nk_sdl_init(win);
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ctx = nk_sdl_init(win);
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/* Load Fonts: if none of these are loaded a default font will be used */
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/* Load Fonts: if none of these are loaded a default font will be used */
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@ -111,81 +178,13 @@ main(int argc, char* argv[])
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/*set_style(ctx, THEME_BLUE);*/
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/*set_style(ctx, THEME_BLUE);*/
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/*set_style(ctx, THEME_DARK);*/
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/*set_style(ctx, THEME_DARK);*/
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background = nk_rgb(28,48,62);
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#if defined(__EMSCRIPTEN__)
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while (running)
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#include <emscripten.h>
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{
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emscripten_set_main_loop_arg(MainLoop, (void*)ctx, 0, nk_true);
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/* Input */
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#else
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SDL_Event evt;
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while (running) MainLoop((void*)ctx);
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nk_input_begin(ctx);
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#endif
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while (SDL_PollEvent(&evt)) {
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if (evt.type == SDL_QUIT) goto cleanup;
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nk_sdl_handle_event(&evt);
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}
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nk_input_end(ctx);
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/* GUI */
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if (nk_begin(ctx, "Demo", nk_rect(50, 50, 200, 200),
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NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
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NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
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{
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nk_menubar_begin(ctx);
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nk_layout_row_begin(ctx, NK_STATIC, 25, 2);
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nk_layout_row_push(ctx, 45);
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if (nk_menu_begin_label(ctx, "FILE", NK_TEXT_LEFT, nk_vec2(120, 200))) {
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nk_layout_row_dynamic(ctx, 30, 1);
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nk_menu_item_label(ctx, "OPEN", NK_TEXT_LEFT);
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nk_menu_item_label(ctx, "CLOSE", NK_TEXT_LEFT);
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nk_menu_end(ctx);
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}
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nk_layout_row_push(ctx, 45);
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if (nk_menu_begin_label(ctx, "EDIT", NK_TEXT_LEFT, nk_vec2(120, 200))) {
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nk_layout_row_dynamic(ctx, 30, 1);
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nk_menu_item_label(ctx, "COPY", NK_TEXT_LEFT);
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nk_menu_item_label(ctx, "CUT", NK_TEXT_LEFT);
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nk_menu_item_label(ctx, "PASTE", NK_TEXT_LEFT);
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nk_menu_end(ctx);
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}
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nk_layout_row_end(ctx);
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nk_menubar_end(ctx);
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enum {EASY, HARD};
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static int op = EASY;
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static int property = 20;
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nk_layout_row_static(ctx, 30, 80, 1);
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if (nk_button_label(ctx, "button"))
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fprintf(stdout, "button pressed\n");
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nk_layout_row_dynamic(ctx, 30, 2);
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if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
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if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
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nk_layout_row_dynamic(ctx, 25, 1);
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nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
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}
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nk_end(ctx);
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/* -------------- EXAMPLES ---------------- */
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/*calculator(ctx);*/
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/*overview(ctx);*/
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/*node_editor(ctx);*/
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/* ----------------------------------------- */
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/* Draw */
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{float bg[4];
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nk_color_fv(bg, background);
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SDL_GetWindowSize(win, &win_width, &win_height);
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glViewport(0, 0, win_width, win_height);
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glClear(GL_COLOR_BUFFER_BIT);
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glClearColor(bg[0], bg[1], bg[2], bg[3]);
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/* IMPORTANT: `nk_sdl_render` modifies some global OpenGL state
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* with blending, scissor, face culling, depth test and viewport and
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* defaults everything back into a default state.
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* Make sure to either a.) save and restore or b.) reset your own state after
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* rendering the UI. */
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nk_sdl_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_MEMORY, MAX_ELEMENT_MEMORY);
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SDL_GL_SwapWindow(win);}
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}
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cleanup:
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nk_sdl_shutdown();
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nk_sdl_shutdown();
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SDL_GL_DeleteContext(glContext);
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SDL_GL_DeleteContext(glContext);
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SDL_DestroyWindow(win);
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SDL_DestroyWindow(win);
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