mirror of
https://github.com/libsdl-org/SDL.git
synced 2025-10-16 06:45:59 +00:00
Fixes bug #2037, common EGL code for Android and X11
This commit is contained in:
Gabriel Jacobo
@@ -20,86 +20,22 @@
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*/
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#include "SDL_config.h"
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#if SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_ES
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#if SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_EGL
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#include "SDL_x11video.h"
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#include "SDL_x11opengles.h"
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#include "SDL_x11opengl.h"
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#define DEFAULT_EGL "libEGL.so"
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#define DEFAULT_OGL_ES2 "libGLESv2.so"
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#define DEFAULT_OGL_ES_PVR "libGLES_CM.so"
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#define DEFAULT_OGL_ES "libGLESv1_CM.so"
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#define LOAD_FUNC(NAME) \
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*((void**)&_this->gles_data->NAME) = dlsym(handle, #NAME); \
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if (!_this->gles_data->NAME) \
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{ \
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return SDL_SetError("Could not retrieve EGL function " #NAME); \
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}
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/* GLES implementation of SDL OpenGL support */
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void *
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X11_GLES_GetProcAddress(_THIS, const char *proc)
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{
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static char procname[1024];
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void *handle;
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void *retval;
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handle = _this->gles_data->egl_dll_handle;
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if (_this->gles_data->eglGetProcAddress) {
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retval = _this->gles_data->eglGetProcAddress(proc);
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if (retval) {
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return retval;
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}
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}
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handle = _this->gl_config.dll_handle;
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#if defined(__OpenBSD__) && !defined(__ELF__)
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#undef dlsym(x,y);
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#endif
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retval = dlsym(handle, proc);
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if (!retval && strlen(proc) <= 1022) {
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procname[0] = '_';
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strcpy(procname + 1, proc);
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retval = dlsym(handle, procname);
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}
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return retval;
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}
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void
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X11_GLES_UnloadLibrary(_THIS)
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{
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if ((_this->gles_data) && (_this->gl_config.driver_loaded)) {
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_this->gles_data->eglTerminate(_this->gles_data->egl_display);
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dlclose(_this->gl_config.dll_handle);
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dlclose(_this->gles_data->egl_dll_handle);
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SDL_free(_this->gles_data);
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_this->gles_data = NULL;
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_this->gl_config.dll_handle = NULL;
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_this->gl_config.driver_loaded = 0;
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}
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}
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/* EGL implementation of SDL OpenGL support */
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int
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X11_GLES_LoadLibrary(_THIS, const char *path)
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{
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void *handle;
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int dlopen_flags;
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X11_GLES_LoadLibrary(_THIS, const char *path) {
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SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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if (_this->gles_data) {
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return SDL_SetError("OpenGL ES context already created");
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}
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/* If SDL_GL_CONTEXT_EGL has been changed to 0, switch over to X11_GL functions */
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if (_this->gl_config.use_egl == 0) {
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#if SDL_VIDEO_OPENGL_GLX
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#if SDL_VIDEO_OPENGL_GLX
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_this->GL_LoadLibrary = X11_GL_LoadLibrary;
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_this->GL_GetProcAddress = X11_GL_GetProcAddress;
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_this->GL_UnloadLibrary = X11_GL_UnloadLibrary;
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@@ -110,331 +46,63 @@ X11_GLES_LoadLibrary(_THIS, const char *path)
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_this->GL_SwapWindow = X11_GL_SwapWindow;
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_this->GL_DeleteContext = X11_GL_DeleteContext;
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return X11_GL_LoadLibrary(_this, path);
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#else
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#else
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return SDL_SetError("SDL not configured with OpenGL/GLX support");
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#endif
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#endif
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}
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#ifdef RTLD_GLOBAL
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dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
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#else
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dlopen_flags = RTLD_LAZY;
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#endif
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handle = dlopen(path, dlopen_flags);
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/* Catch the case where the application isn't linked with EGL */
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if ((dlsym(handle, "eglChooseConfig") == NULL) && (path == NULL)) {
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dlclose(handle);
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path = getenv("SDL_VIDEO_EGL_DRIVER");
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if (path == NULL) {
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path = DEFAULT_EGL;
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}
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handle = dlopen(path, dlopen_flags);
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}
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if (handle == NULL) {
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return SDL_SetError("Could not load OpenGL ES/EGL library");
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}
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/* Unload the old driver and reset the pointers */
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X11_GLES_UnloadLibrary(_this);
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_this->gles_data = (struct SDL_PrivateGLESData *) SDL_calloc(1, sizeof(SDL_PrivateGLESData));
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if (!_this->gles_data) {
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return SDL_OutOfMemory();
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}
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/* Load new function pointers */
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LOAD_FUNC(eglGetDisplay);
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LOAD_FUNC(eglInitialize);
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LOAD_FUNC(eglTerminate);
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LOAD_FUNC(eglGetProcAddress);
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LOAD_FUNC(eglChooseConfig);
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LOAD_FUNC(eglGetConfigAttrib);
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LOAD_FUNC(eglCreateContext);
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LOAD_FUNC(eglDestroyContext);
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LOAD_FUNC(eglCreateWindowSurface);
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LOAD_FUNC(eglDestroySurface);
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LOAD_FUNC(eglMakeCurrent);
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LOAD_FUNC(eglSwapBuffers);
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LOAD_FUNC(eglSwapInterval);
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_this->gles_data->egl_display =
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_this->gles_data->eglGetDisplay((NativeDisplayType) data->display);
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if (!_this->gles_data->egl_display) {
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return SDL_SetError("Could not get EGL display");
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}
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if (_this->gles_data->
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eglInitialize(_this->gles_data->egl_display, NULL,
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NULL) != EGL_TRUE) {
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return SDL_SetError("Could not initialize EGL");
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}
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_this->gles_data->egl_dll_handle = handle;
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path = getenv("SDL_VIDEO_GL_DRIVER");
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handle = dlopen(path, dlopen_flags);
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if ((path == NULL) | (handle == NULL)) {
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if (_this->gl_config.major_version > 1) {
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path = DEFAULT_OGL_ES2;
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handle = dlopen(path, dlopen_flags);
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} else {
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path = DEFAULT_OGL_ES;
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handle = dlopen(path, dlopen_flags);
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if (handle == NULL) {
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path = DEFAULT_OGL_ES_PVR;
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handle = dlopen(path, dlopen_flags);
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}
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}
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}
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if (handle == NULL) {
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return SDL_SetError("Could not initialize OpenGL ES library");
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}
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_this->gl_config.dll_handle = handle;
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_this->gl_config.driver_loaded = 1;
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if (path) {
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strncpy(_this->gl_config.driver_path, path,
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sizeof(_this->gl_config.driver_path) - 1);
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} else {
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strcpy(_this->gl_config.driver_path, "");
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}
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return 0;
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return SDL_EGL_LoadLibrary(_this, path, (NativeDisplayType) data->display);
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}
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XVisualInfo *
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X11_GLES_GetVisual(_THIS, Display * display, int screen)
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{
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/* 64 seems nice. */
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EGLint attribs[64];
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EGLint found_configs = 0;
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XVisualInfo *egl_visualinfo = NULL;
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EGLint visual_id;
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int i;
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XVisualInfo vi_in;
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int out_count;
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if (!_this->gles_data) {
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if (!_this->egl_data) {
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/* The EGL library wasn't loaded, SDL_GetError() should have info */
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return NULL;
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}
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i = 0;
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attribs[i++] = EGL_RED_SIZE;
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attribs[i++] = _this->gl_config.red_size;
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attribs[i++] = EGL_GREEN_SIZE;
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attribs[i++] = _this->gl_config.green_size;
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attribs[i++] = EGL_BLUE_SIZE;
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attribs[i++] = _this->gl_config.blue_size;
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if (_this->gl_config.alpha_size) {
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attribs[i++] = EGL_ALPHA_SIZE;
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attribs[i++] = _this->gl_config.alpha_size;
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}
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if (_this->gl_config.buffer_size) {
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attribs[i++] = EGL_BUFFER_SIZE;
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attribs[i++] = _this->gl_config.buffer_size;
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}
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attribs[i++] = EGL_DEPTH_SIZE;
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attribs[i++] = _this->gl_config.depth_size;
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if (_this->gl_config.stencil_size) {
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attribs[i++] = EGL_STENCIL_SIZE;
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attribs[i++] = _this->gl_config.stencil_size;
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}
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if (_this->gl_config.multisamplebuffers) {
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attribs[i++] = EGL_SAMPLE_BUFFERS;
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attribs[i++] = _this->gl_config.multisamplebuffers;
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}
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if (_this->gl_config.multisamplesamples) {
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attribs[i++] = EGL_SAMPLES;
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attribs[i++] = _this->gl_config.multisamplesamples;
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}
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attribs[i++] = EGL_RENDERABLE_TYPE;
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if (_this->gl_config.major_version == 2) {
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attribs[i++] = EGL_OPENGL_ES2_BIT;
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} else {
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attribs[i++] = EGL_OPENGL_ES_BIT;
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}
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attribs[i++] = EGL_NONE;
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if (_this->gles_data->eglChooseConfig(_this->gles_data->egl_display,
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attribs,
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&_this->gles_data->egl_config, 1,
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&found_configs) == EGL_FALSE ||
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found_configs == 0) {
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SDL_SetError("Couldn't find matching EGL config");
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return NULL;
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}
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if (_this->gles_data->eglGetConfigAttrib(_this->gles_data->egl_display,
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_this->gles_data->egl_config,
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EGL_NATIVE_VISUAL_ID,
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&visual_id) ==
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EGL_FALSE || !visual_id) {
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if (_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
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_this->egl_data->egl_config,
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EGL_NATIVE_VISUAL_ID,
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&visual_id) == EGL_FALSE || !visual_id) {
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/* Use the default visual when all else fails */
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XVisualInfo vi_in;
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int out_count;
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vi_in.screen = screen;
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_this->gles_data->egl_visualinfo = XGetVisualInfo(display,
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VisualScreenMask,
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&vi_in, &out_count);
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egl_visualinfo = XGetVisualInfo(display,
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VisualScreenMask,
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&vi_in, &out_count);
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} else {
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XVisualInfo vi_in;
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int out_count;
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vi_in.screen = screen;
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vi_in.visualid = visual_id;
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_this->gles_data->egl_visualinfo = XGetVisualInfo(display,
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VisualScreenMask |
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VisualIDMask,
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&vi_in, &out_count);
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egl_visualinfo = XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &vi_in, &out_count);
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}
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return _this->gles_data->egl_visualinfo;
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return egl_visualinfo;
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}
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SDL_GLContext
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X11_GLES_CreateContext(_THIS, SDL_Window * window)
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{
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EGLint context_attrib_list[] = {
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EGL_CONTEXT_CLIENT_VERSION,
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1,
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EGL_NONE
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};
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SDL_GLContext context;
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SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
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Display *display = data->videodata->display;
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SDL_GLContext context = (SDL_GLContext)1;
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XSync(display, False);
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if (_this->gl_config.major_version) {
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context_attrib_list[1] = _this->gl_config.major_version;
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}
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_this->gles_data->egl_context =
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_this->gles_data->eglCreateContext(_this->gles_data->egl_display,
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_this->gles_data->egl_config,
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EGL_NO_CONTEXT, context_attrib_list);
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context = SDL_EGL_CreateContext(_this, data->egl_surface);
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XSync(display, False);
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if (_this->gles_data->egl_context == EGL_NO_CONTEXT) {
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SDL_SetError("Could not create EGL context");
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return NULL;
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}
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_this->gles_data->egl_swapinterval = 0;
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if (X11_GLES_MakeCurrent(_this, window, context) < 0) {
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X11_GLES_DeleteContext(_this, context);
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return NULL;
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}
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return context;
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}
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int
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X11_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
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{
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/*
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SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
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Display *display = data->videodata->display;
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*/
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SDL_EGL_SwapWindow_impl(X11)
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SDL_EGL_MakeCurrent_impl(X11)
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if (!_this->gles_data) {
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return SDL_SetError("OpenGL not initialized");
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}
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if (!_this->gles_data->eglMakeCurrent(_this->gles_data->egl_display,
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_this->gles_data->egl_surface,
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_this->gles_data->egl_surface,
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_this->gles_data->egl_context)) {
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return SDL_SetError("Unable to make EGL context current");
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}
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/*
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XSync(display, False);
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*/
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return 1;
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}
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int
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X11_GLES_SetSwapInterval(_THIS, int interval)
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{
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if (_this->gles_data) {
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return SDL_SetError("OpenGL ES context not active");
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}
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EGLBoolean status;
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status = _this->gles_data->eglSwapInterval(_this->gles_data->egl_display, interval);
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if (status == EGL_TRUE) {
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_this->gles_data->egl_swapinterval = interval;
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return 0;
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}
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return SDL_SetError("Unable to set the EGL swap interval");
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}
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int
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X11_GLES_GetSwapInterval(_THIS)
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{
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if (_this->gles_data) {
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return SDL_SetError("OpenGL ES context not active");
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}
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return _this->gles_data->egl_swapinterval;
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}
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void
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X11_GLES_SwapWindow(_THIS, SDL_Window * window)
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{
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_this->gles_data->eglSwapBuffers(_this->gles_data->egl_display,
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_this->gles_data->egl_surface);
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}
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void
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X11_GLES_DeleteContext(_THIS, SDL_GLContext context)
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{
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/* Clean up GLES and EGL */
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if (!_this->gles_data) {
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return;
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}
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if (_this->gles_data->egl_context != EGL_NO_CONTEXT ||
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_this->gles_data->egl_surface != EGL_NO_SURFACE) {
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_this->gles_data->eglMakeCurrent(_this->gles_data->egl_display,
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EGL_NO_SURFACE, EGL_NO_SURFACE,
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EGL_NO_CONTEXT);
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if (_this->gles_data->egl_context != EGL_NO_CONTEXT) {
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_this->gles_data->eglDestroyContext(_this->gles_data->egl_display,
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_this->gles_data->
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egl_context);
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_this->gles_data->egl_context = EGL_NO_CONTEXT;
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}
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if (_this->gles_data->egl_surface != EGL_NO_SURFACE) {
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_this->gles_data->eglDestroySurface(_this->gles_data->egl_display,
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_this->gles_data->
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egl_surface);
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_this->gles_data->egl_surface = EGL_NO_SURFACE;
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}
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}
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/* crappy fix */
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X11_GLES_UnloadLibrary(_this);
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}
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#endif /* SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_ES */
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#endif /* SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_EGL */
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/* vi: set ts=4 sw=4 expandtab: */
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