| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "SDL_config.h" |
| |
| #if SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_ES |
| |
| #include "SDL_x11video.h" |
| #include "SDL_x11opengles.h" |
| #include "SDL_x11opengl.h" |
| |
| #define DEFAULT_EGL "libEGL.so" |
| #define DEFAULT_OGL_ES2 "libGLESv2.so" |
| #define DEFAULT_OGL_ES_PVR "libGLES_CM.so" |
| #define DEFAULT_OGL_ES "libGLESv1_CM.so" |
| |
| #define LOAD_FUNC(NAME) \ |
| *((void**)&_this->gles_data->NAME) = dlsym(handle, #NAME); \ |
| if (!_this->gles_data->NAME) \ |
| { \ |
| return SDL_SetError("Could not retrieve EGL function " #NAME); \ |
| } |
| |
| /* GLES implementation of SDL OpenGL support */ |
| |
| void * |
| X11_GLES_GetProcAddress(_THIS, const char *proc) |
| { |
| static char procname[1024]; |
| void *handle; |
| void *retval; |
| |
| handle = _this->gles_data->egl_dll_handle; |
| if (_this->gles_data->eglGetProcAddress) { |
| retval = _this->gles_data->eglGetProcAddress(proc); |
| if (retval) { |
| return retval; |
| } |
| } |
| |
| handle = _this->gl_config.dll_handle; |
| #if defined(__OpenBSD__) && !defined(__ELF__) |
| #undef dlsym(x,y); |
| #endif |
| retval = dlsym(handle, proc); |
| if (!retval && strlen(proc) <= 1022) { |
| procname[0] = '_'; |
| strcpy(procname + 1, proc); |
| retval = dlsym(handle, procname); |
| } |
| return retval; |
| } |
| |
| void |
| X11_GLES_UnloadLibrary(_THIS) |
| { |
| if ((_this->gles_data) && (_this->gl_config.driver_loaded)) { |
| _this->gles_data->eglTerminate(_this->gles_data->egl_display); |
| |
| dlclose(_this->gl_config.dll_handle); |
| dlclose(_this->gles_data->egl_dll_handle); |
| |
| SDL_free(_this->gles_data); |
| _this->gles_data = NULL; |
| |
| _this->gl_config.dll_handle = NULL; |
| _this->gl_config.driver_loaded = 0; |
| } |
| } |
| |
| int |
| X11_GLES_LoadLibrary(_THIS, const char *path) |
| { |
| void *handle; |
| int dlopen_flags; |
| |
| SDL_VideoData *data = (SDL_VideoData *) _this->driverdata; |
| |
| if (_this->gles_data) { |
| return SDL_SetError("OpenGL ES context already created"); |
| } |
| |
| /* If SDL_GL_CONTEXT_EGL has been changed to 0, switch over to X11_GL functions */ |
| if (_this->gl_config.use_egl == 0) { |
| #if SDL_VIDEO_OPENGL_GLX |
| _this->GL_LoadLibrary = X11_GL_LoadLibrary; |
| _this->GL_GetProcAddress = X11_GL_GetProcAddress; |
| _this->GL_UnloadLibrary = X11_GL_UnloadLibrary; |
| _this->GL_CreateContext = X11_GL_CreateContext; |
| _this->GL_MakeCurrent = X11_GL_MakeCurrent; |
| _this->GL_SetSwapInterval = X11_GL_SetSwapInterval; |
| _this->GL_GetSwapInterval = X11_GL_GetSwapInterval; |
| _this->GL_SwapWindow = X11_GL_SwapWindow; |
| _this->GL_DeleteContext = X11_GL_DeleteContext; |
| return X11_GL_LoadLibrary(_this, path); |
| #else |
| return SDL_SetError("SDL not configured with OpenGL/GLX support"); |
| #endif |
| } |
| |
| #ifdef RTLD_GLOBAL |
| dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; |
| #else |
| dlopen_flags = RTLD_LAZY; |
| #endif |
| handle = dlopen(path, dlopen_flags); |
| /* Catch the case where the application isn't linked with EGL */ |
| if ((dlsym(handle, "eglChooseConfig") == NULL) && (path == NULL)) { |
| |
| dlclose(handle); |
| path = getenv("SDL_VIDEO_EGL_DRIVER"); |
| if (path == NULL) { |
| path = DEFAULT_EGL; |
| } |
| handle = dlopen(path, dlopen_flags); |
| } |
| |
| if (handle == NULL) { |
| return SDL_SetError("Could not load OpenGL ES/EGL library"); |
| } |
| |
| /* Unload the old driver and reset the pointers */ |
| X11_GLES_UnloadLibrary(_this); |
| |
| _this->gles_data = (struct SDL_PrivateGLESData *) SDL_calloc(1, sizeof(SDL_PrivateGLESData)); |
| if (!_this->gles_data) { |
| return SDL_OutOfMemory(); |
| } |
| |
| /* Load new function pointers */ |
| LOAD_FUNC(eglGetDisplay); |
| LOAD_FUNC(eglInitialize); |
| LOAD_FUNC(eglTerminate); |
| LOAD_FUNC(eglGetProcAddress); |
| LOAD_FUNC(eglChooseConfig); |
| LOAD_FUNC(eglGetConfigAttrib); |
| LOAD_FUNC(eglCreateContext); |
| LOAD_FUNC(eglDestroyContext); |
| LOAD_FUNC(eglCreateWindowSurface); |
| LOAD_FUNC(eglDestroySurface); |
| LOAD_FUNC(eglMakeCurrent); |
| LOAD_FUNC(eglSwapBuffers); |
| LOAD_FUNC(eglSwapInterval); |
| |
| _this->gles_data->egl_display = |
| _this->gles_data->eglGetDisplay((NativeDisplayType) data->display); |
| |
| if (!_this->gles_data->egl_display) { |
| return SDL_SetError("Could not get EGL display"); |
| } |
| |
| if (_this->gles_data-> |
| eglInitialize(_this->gles_data->egl_display, NULL, |
| NULL) != EGL_TRUE) { |
| return SDL_SetError("Could not initialize EGL"); |
| } |
| |
| _this->gles_data->egl_dll_handle = handle; |
| |
| path = getenv("SDL_VIDEO_GL_DRIVER"); |
| handle = dlopen(path, dlopen_flags); |
| if ((path == NULL) | (handle == NULL)) { |
| if (_this->gl_config.major_version > 1) { |
| path = DEFAULT_OGL_ES2; |
| handle = dlopen(path, dlopen_flags); |
| } else { |
| path = DEFAULT_OGL_ES; |
| handle = dlopen(path, dlopen_flags); |
| if (handle == NULL) { |
| path = DEFAULT_OGL_ES_PVR; |
| handle = dlopen(path, dlopen_flags); |
| } |
| } |
| } |
| |
| if (handle == NULL) { |
| return SDL_SetError("Could not initialize OpenGL ES library"); |
| } |
| |
| _this->gl_config.dll_handle = handle; |
| _this->gl_config.driver_loaded = 1; |
| |
| if (path) { |
| strncpy(_this->gl_config.driver_path, path, |
| sizeof(_this->gl_config.driver_path) - 1); |
| } else { |
| strcpy(_this->gl_config.driver_path, ""); |
| } |
| return 0; |
| } |
| |
| XVisualInfo * |
| X11_GLES_GetVisual(_THIS, Display * display, int screen) |
| { |
| /* 64 seems nice. */ |
| EGLint attribs[64]; |
| EGLint found_configs = 0; |
| EGLint visual_id; |
| int i; |
| |
| if (!_this->gles_data) { |
| /* The EGL library wasn't loaded, SDL_GetError() should have info */ |
| return NULL; |
| } |
| |
| i = 0; |
| attribs[i++] = EGL_RED_SIZE; |
| attribs[i++] = _this->gl_config.red_size; |
| attribs[i++] = EGL_GREEN_SIZE; |
| attribs[i++] = _this->gl_config.green_size; |
| attribs[i++] = EGL_BLUE_SIZE; |
| attribs[i++] = _this->gl_config.blue_size; |
| |
| if (_this->gl_config.alpha_size) { |
| attribs[i++] = EGL_ALPHA_SIZE; |
| attribs[i++] = _this->gl_config.alpha_size; |
| } |
| |
| if (_this->gl_config.buffer_size) { |
| attribs[i++] = EGL_BUFFER_SIZE; |
| attribs[i++] = _this->gl_config.buffer_size; |
| } |
| |
| attribs[i++] = EGL_DEPTH_SIZE; |
| attribs[i++] = _this->gl_config.depth_size; |
| |
| if (_this->gl_config.stencil_size) { |
| attribs[i++] = EGL_STENCIL_SIZE; |
| attribs[i++] = _this->gl_config.stencil_size; |
| } |
| |
| if (_this->gl_config.multisamplebuffers) { |
| attribs[i++] = EGL_SAMPLE_BUFFERS; |
| attribs[i++] = _this->gl_config.multisamplebuffers; |
| } |
| |
| if (_this->gl_config.multisamplesamples) { |
| attribs[i++] = EGL_SAMPLES; |
| attribs[i++] = _this->gl_config.multisamplesamples; |
| } |
| |
| attribs[i++] = EGL_RENDERABLE_TYPE; |
| if (_this->gl_config.major_version == 2) { |
| attribs[i++] = EGL_OPENGL_ES2_BIT; |
| } else { |
| attribs[i++] = EGL_OPENGL_ES_BIT; |
| } |
| |
| attribs[i++] = EGL_NONE; |
| |
| if (_this->gles_data->eglChooseConfig(_this->gles_data->egl_display, |
| attribs, |
| &_this->gles_data->egl_config, 1, |
| &found_configs) == EGL_FALSE || |
| found_configs == 0) { |
| SDL_SetError("Couldn't find matching EGL config"); |
| return NULL; |
| } |
| |
| if (_this->gles_data->eglGetConfigAttrib(_this->gles_data->egl_display, |
| _this->gles_data->egl_config, |
| EGL_NATIVE_VISUAL_ID, |
| &visual_id) == |
| EGL_FALSE || !visual_id) { |
| /* Use the default visual when all else fails */ |
| XVisualInfo vi_in; |
| int out_count; |
| vi_in.screen = screen; |
| |
| _this->gles_data->egl_visualinfo = XGetVisualInfo(display, |
| VisualScreenMask, |
| &vi_in, &out_count); |
| } else { |
| XVisualInfo vi_in; |
| int out_count; |
| |
| vi_in.screen = screen; |
| vi_in.visualid = visual_id; |
| _this->gles_data->egl_visualinfo = XGetVisualInfo(display, |
| VisualScreenMask | |
| VisualIDMask, |
| &vi_in, &out_count); |
| } |
| |
| return _this->gles_data->egl_visualinfo; |
| } |
| |
| SDL_GLContext |
| X11_GLES_CreateContext(_THIS, SDL_Window * window) |
| { |
| EGLint context_attrib_list[] = { |
| EGL_CONTEXT_CLIENT_VERSION, |
| 1, |
| EGL_NONE |
| }; |
| |
| SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| Display *display = data->videodata->display; |
| SDL_GLContext context = (SDL_GLContext)1; |
| |
| XSync(display, False); |
| |
| if (_this->gl_config.major_version) { |
| context_attrib_list[1] = _this->gl_config.major_version; |
| } |
| |
| _this->gles_data->egl_context = |
| _this->gles_data->eglCreateContext(_this->gles_data->egl_display, |
| _this->gles_data->egl_config, |
| EGL_NO_CONTEXT, context_attrib_list); |
| XSync(display, False); |
| |
| if (_this->gles_data->egl_context == EGL_NO_CONTEXT) { |
| SDL_SetError("Could not create EGL context"); |
| return NULL; |
| } |
| |
| _this->gles_data->egl_swapinterval = 0; |
| |
| if (X11_GLES_MakeCurrent(_this, window, context) < 0) { |
| X11_GLES_DeleteContext(_this, context); |
| return NULL; |
| } |
| |
| return context; |
| } |
| |
| int |
| X11_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) |
| { |
| /* |
| SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| Display *display = data->videodata->display; |
| */ |
| |
| if (!_this->gles_data) { |
| return SDL_SetError("OpenGL not initialized"); |
| } |
| |
| if (!_this->gles_data->eglMakeCurrent(_this->gles_data->egl_display, |
| _this->gles_data->egl_surface, |
| _this->gles_data->egl_surface, |
| _this->gles_data->egl_context)) { |
| return SDL_SetError("Unable to make EGL context current"); |
| } |
| |
| /* |
| XSync(display, False); |
| */ |
| |
| return 1; |
| } |
| |
| int |
| X11_GLES_SetSwapInterval(_THIS, int interval) |
| { |
| if (_this->gles_data) { |
| return SDL_SetError("OpenGL ES context not active"); |
| } |
| |
| EGLBoolean status; |
| status = _this->gles_data->eglSwapInterval(_this->gles_data->egl_display, interval); |
| if (status == EGL_TRUE) { |
| _this->gles_data->egl_swapinterval = interval; |
| return 0; |
| } |
| |
| return SDL_SetError("Unable to set the EGL swap interval"); |
| } |
| |
| int |
| X11_GLES_GetSwapInterval(_THIS) |
| { |
| if (_this->gles_data) { |
| return SDL_SetError("OpenGL ES context not active"); |
| } |
| |
| return _this->gles_data->egl_swapinterval; |
| } |
| |
| void |
| X11_GLES_SwapWindow(_THIS, SDL_Window * window) |
| { |
| _this->gles_data->eglSwapBuffers(_this->gles_data->egl_display, |
| _this->gles_data->egl_surface); |
| } |
| |
| void |
| X11_GLES_DeleteContext(_THIS, SDL_GLContext context) |
| { |
| /* Clean up GLES and EGL */ |
| if (!_this->gles_data) { |
| return; |
| } |
| |
| if (_this->gles_data->egl_context != EGL_NO_CONTEXT || |
| _this->gles_data->egl_surface != EGL_NO_SURFACE) { |
| _this->gles_data->eglMakeCurrent(_this->gles_data->egl_display, |
| EGL_NO_SURFACE, EGL_NO_SURFACE, |
| EGL_NO_CONTEXT); |
| |
| if (_this->gles_data->egl_context != EGL_NO_CONTEXT) { |
| _this->gles_data->eglDestroyContext(_this->gles_data->egl_display, |
| _this->gles_data-> |
| egl_context); |
| _this->gles_data->egl_context = EGL_NO_CONTEXT; |
| } |
| |
| if (_this->gles_data->egl_surface != EGL_NO_SURFACE) { |
| _this->gles_data->eglDestroySurface(_this->gles_data->egl_display, |
| _this->gles_data-> |
| egl_surface); |
| _this->gles_data->egl_surface = EGL_NO_SURFACE; |
| } |
| } |
| |
| /* crappy fix */ |
| X11_GLES_UnloadLibrary(_this); |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_ES */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |