diff options
Diffstat (limited to 'progs/egl/eglut/eglut.c')
| -rw-r--r-- | progs/egl/eglut/eglut.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/progs/egl/eglut/eglut.c b/progs/egl/eglut/eglut.c new file mode 100644 index 0000000000..b9b5e6e5a8 --- /dev/null +++ b/progs/egl/eglut/eglut.c @@ -0,0 +1,346 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> +#include <sys/time.h> + +#include "EGL/egl.h" +#include "EGL/eglext.h" + +#include "eglutint.h" + +static struct eglut_state _eglut_state = { + .api_mask = EGLUT_OPENGL_ES1_BIT, + .window_width = 300, + .window_height = 300, + .verbose = 0, + .num_windows = 0, +}; + +struct eglut_state *_eglut = &_eglut_state; + +void +_eglutFatal(char *format, ...) +{ + va_list args; + + va_start(args, format); + + fprintf(stderr, "EGLUT: "); + vfprintf(stderr, format, args); + va_end(args); + putc('\n', stderr); + + exit(1); +} + +/* return current time (in milliseconds) */ +int +_eglutNow(void) +{ + struct timeval tv; +#ifdef __VMS + (void) gettimeofday(&tv, NULL ); +#else + struct timezone tz; + (void) gettimeofday(&tv, &tz); +#endif + return tv.tv_sec * 1000 + tv.tv_usec / 1000; +} + +static void +_eglutDestroyWindow(struct eglut_window *win) +{ + if (_eglut->surface_type != EGL_PBUFFER_BIT && + _eglut->surface_type != EGL_SCREEN_BIT_MESA) + eglDestroySurface(_eglut->dpy, win->surface); + + _eglutNativeFiniWindow(win); + + eglDestroyContext(_eglut->dpy, win->context); +} + +static EGLConfig +_eglutChooseConfig(void) +{ + EGLConfig config; + EGLint config_attribs[32]; + EGLint renderable_type, num_configs, i; + + i = 0; + config_attribs[i++] = EGL_RED_SIZE; + config_attribs[i++] = 1; + config_attribs[i++] = EGL_GREEN_SIZE; + config_attribs[i++] = 1; + config_attribs[i++] = EGL_BLUE_SIZE; + config_attribs[i++] = 1; + config_attribs[i++] = EGL_DEPTH_SIZE; + config_attribs[i++] = 1; + + config_attribs[i++] = EGL_SURFACE_TYPE; + config_attribs[i++] = _eglut->surface_type; + + config_attribs[i++] = EGL_RENDERABLE_TYPE; + renderable_type = 0x0; + if (_eglut->api_mask & EGLUT_OPENGL_BIT) + renderable_type |= EGL_OPENGL_BIT; + if (_eglut->api_mask & (EGLUT_OPENGL_ES1_BIT | EGLUT_OPENGL_ES2_BIT)) + renderable_type |= EGL_OPENGL_ES_BIT; + if (_eglut->api_mask & EGLUT_OPENVG_BIT) + renderable_type |= EGL_OPENVG_BIT; + config_attribs[i++] = renderable_type; + + config_attribs[i] = EGL_NONE; + + if (!eglChooseConfig(_eglut->dpy, + config_attribs, &config, 1, &num_configs) || !num_configs) + _eglutFatal("failed to choose a config"); + + return config; +} + +static struct eglut_window * +_eglutCreateWindow(const char *title, int x, int y, int w, int h) +{ + struct eglut_window *win; + EGLint context_attribs[4]; + EGLint api, i; + + win = calloc(1, sizeof(*win)); + if (!win) + _eglutFatal("failed to allocate window"); + + win->config = _eglutChooseConfig(); + + i = 0; + context_attribs[i] = EGL_NONE; + + /* multiple APIs? */ + + api = EGL_OPENGL_ES_API; + if (_eglut->api_mask & EGLUT_OPENGL_BIT) { + api = EGL_OPENGL_API; + } + else if (_eglut->api_mask & EGLUT_OPENVG_BIT) { + api = EGL_OPENVG_API; + } + else if (_eglut->api_mask & EGLUT_OPENGL_ES2_BIT) { + context_attribs[i++] = EGL_CONTEXT_CLIENT_VERSION; + context_attribs[i++] = 2; + } + + context_attribs[i] = EGL_NONE; + + eglBindAPI(api); + win->context = eglCreateContext(_eglut->dpy, + win->config, EGL_NO_CONTEXT, context_attribs); + if (!win->context) + _eglutFatal("failed to create context"); + + _eglutNativeInitWindow(win, title, x, y, w, h); + switch (_eglut->surface_type) { + case EGL_WINDOW_BIT: + win->surface = eglCreateWindowSurface(_eglut->dpy, + win->config, win->native.u.window, NULL); + break; + case EGL_PIXMAP_BIT: + win->surface = eglCreatePixmapSurface(_eglut->dpy, + win->config, win->native.u.pixmap, NULL); + break; + case EGL_PBUFFER_BIT: + case EGL_SCREEN_BIT_MESA: + win->surface = win->native.u.surface; + break; + default: + break; + } + if (win->surface == EGL_NO_SURFACE) + _eglutFatal("failed to create surface"); + + return win; +} + +void +eglutInitAPIMask(int mask) +{ + _eglut->api_mask = mask; +} + +void +eglutInitWindowSize(int width, int height) +{ + _eglut->window_width = width; + _eglut->window_height = height; +} + +void +eglutInit(int argc, char **argv) +{ + int i; + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-display") == 0) + _eglut->display_name = argv[++i]; + else if (strcmp(argv[i], "-info") == 0) { + _eglut->verbose = 1; + } + } + + _eglutNativeInitDisplay(); + _eglut->dpy = eglGetDisplay(_eglut->native_dpy); + + if (!eglInitialize(_eglut->dpy, &_eglut->major, &_eglut->minor)) + _eglutFatal("failed to initialize EGL display"); + + _eglut->init_time = _eglutNow(); + + printf("EGL_VERSION = %s\n", eglQueryString(_eglut->dpy, EGL_VERSION)); + if (_eglut->verbose) { + printf("EGL_VENDOR = %s\n", eglQueryString(_eglut->dpy, EGL_VENDOR)); + printf("EGL_EXTENSIONS = %s\n", + eglQueryString(_eglut->dpy, EGL_EXTENSIONS)); + printf("EGL_CLIENT_APIS = %s\n", + eglQueryString(_eglut->dpy, EGL_CLIENT_APIS)); + } +} + +int +eglutGet(int state) +{ + int val; + + switch (state) { + case EGLUT_ELAPSED_TIME: + val = _eglutNow() - _eglut->init_time; + break; + default: + val = -1; + break; + } + + return val; +} + +void +eglutIdleFunc(EGLUTidleCB func) +{ + _eglut->idle_cb = func; +} + +void +eglutPostRedisplay(void) +{ + _eglut->redisplay = 1; +} + +void +eglutMainLoop(void) +{ + struct eglut_window *win = _eglut->current; + + if (!win) + _eglutFatal("no window is created\n"); + + if (win->reshape_cb) + win->reshape_cb(win->native.width, win->native.height); + + _eglutNativeEventLoop(); +} + +static void +_eglutFini(void) +{ + eglTerminate(_eglut->dpy); + _eglutNativeFiniDisplay(); +} + +void +eglutDestroyWindow(int win) +{ + struct eglut_window *window = _eglut->current; + + if (window->index != win) + return; + + /* XXX it causes some bug in st/egl KMS backend */ + if ( _eglut->surface_type != EGL_SCREEN_BIT_MESA) + eglMakeCurrent(_eglut->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); + + _eglutDestroyWindow(_eglut->current); +} + +static void +_eglutDefaultKeyboard(unsigned char key) +{ + if (key == 27) { + if (_eglut->current) + eglutDestroyWindow(_eglut->current->index); + _eglutFini(); + + exit(0); + } +} + +int +eglutCreateWindow(const char *title) +{ + struct eglut_window *win; + + win = _eglutCreateWindow(title, 0, 0, + _eglut->window_width, _eglut->window_height); + + win->index = _eglut->num_windows++; + win->reshape_cb = NULL; + win->display_cb = NULL; + win->keyboard_cb = _eglutDefaultKeyboard; + win->special_cb = NULL; + + if (!eglMakeCurrent(_eglut->dpy, win->surface, win->surface, win->context)) + _eglutFatal("failed to make window current"); + _eglut->current = win; + + return win->index; +} + +int +eglutGetWindowWidth(void) +{ + struct eglut_window *win = _eglut->current; + return win->native.width; +} + +int +eglutGetWindowHeight(void) +{ + struct eglut_window *win = _eglut->current; + return win->native.height; +} + +void +eglutDisplayFunc(EGLUTdisplayCB func) +{ + struct eglut_window *win = _eglut->current; + win->display_cb = func; + +} + +void +eglutReshapeFunc(EGLUTreshapeCB func) +{ + struct eglut_window *win = _eglut->current; + win->reshape_cb = func; +} + +void +eglutKeyboardFunc(EGLUTkeyboardCB func) +{ + struct eglut_window *win = _eglut->current; + win->keyboard_cb = func; +} + +void +eglutSpecialFunc(EGLUTspecialCB func) +{ + struct eglut_window *win = _eglut->current; + win->special_cb = func; +} |