| /* |
| * Simple DirectMedia Layer |
| * Copyright (C) 1997-2014 Sam Lantinga <[email protected]> |
| * |
| * 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_internal.h" |
| |
| #if SDL_VIDEO_OPENGL_EGL |
| |
| #include "SDL_sysvideo.h" |
| #include "SDL_egl_c.h" |
| #include "SDL_loadso.h" |
| #include "SDL_hints.h" |
| |
| #if SDL_VIDEO_DRIVER_RPI |
| /* Raspbian places the OpenGL ES/EGL binaries in a non standard path */ |
| #define DEFAULT_EGL "/opt/vc/lib/libEGL.so" |
| #define DEFAULT_OGL_ES2 "/opt/vc/lib/libGLESv2.so" |
| #define DEFAULT_OGL_ES_PVR "/opt/vc/lib/libGLES_CM.so" |
| #define DEFAULT_OGL_ES "/opt/vc/lib/libGLESv1_CM.so" |
| |
| #elif SDL_VIDEO_DRIVER_ANDROID |
| /* Android */ |
| #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" |
| |
| #elif SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT |
| /* EGL AND OpenGL ES support via ANGLE */ |
| #define DEFAULT_EGL "libEGL.dll" |
| #define DEFAULT_OGL_ES2 "libGLESv2.dll" |
| #define DEFAULT_OGL_ES_PVR "libGLES_CM.dll" |
| #define DEFAULT_OGL_ES "libGLESv1_CM.dll" |
| |
| #else |
| /* Desktop Linux */ |
| #define DEFAULT_OGL "libGL.so.1" |
| #define DEFAULT_EGL "libEGL.so.1" |
| #define DEFAULT_OGL_ES2 "libGLESv2.so.2" |
| #define DEFAULT_OGL_ES_PVR "libGLES_CM.so.1" |
| #define DEFAULT_OGL_ES "libGLESv1_CM.so.1" |
| #endif /* SDL_VIDEO_DRIVER_RPI */ |
| |
| #define LOAD_FUNC(NAME) \ |
| *((void**)&_this->egl_data->NAME) = SDL_LoadFunction(_this->egl_data->dll_handle, #NAME); \ |
| if (!_this->egl_data->NAME) \ |
| { \ |
| return SDL_SetError("Could not retrieve EGL function " #NAME); \ |
| } |
| |
| /* EGL implementation of SDL OpenGL ES support */ |
| |
| void * |
| SDL_EGL_GetProcAddress(_THIS, const char *proc) |
| { |
| static char procname[1024]; |
| void *retval; |
| |
| /* eglGetProcAddress is busted on Android http://code.google.com/p/android/issues/detail?id=7681 */ |
| #if !defined(SDL_VIDEO_DRIVER_ANDROID) |
| if (_this->egl_data->eglGetProcAddress) { |
| retval = _this->egl_data->eglGetProcAddress(proc); |
| if (retval) { |
| return retval; |
| } |
| } |
| #endif |
| |
| retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, proc); |
| if (!retval && SDL_strlen(proc) <= 1022) { |
| procname[0] = '_'; |
| SDL_strlcpy(procname + 1, proc, 1022); |
| retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, procname); |
| } |
| return retval; |
| } |
| |
| void |
| SDL_EGL_UnloadLibrary(_THIS) |
| { |
| if (_this->egl_data) { |
| if (_this->egl_data->egl_display) { |
| _this->egl_data->eglTerminate(_this->egl_data->egl_display); |
| _this->egl_data->egl_display = NULL; |
| } |
| |
| if (_this->egl_data->dll_handle) { |
| SDL_UnloadObject(_this->egl_data->dll_handle); |
| _this->egl_data->dll_handle = NULL; |
| } |
| if (_this->egl_data->egl_dll_handle) { |
| SDL_UnloadObject(_this->egl_data->egl_dll_handle); |
| _this->egl_data->egl_dll_handle = NULL; |
| } |
| |
| SDL_free(_this->egl_data); |
| _this->egl_data = NULL; |
| } |
| } |
| |
| int |
| SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_display) |
| { |
| void *dll_handle = NULL, *egl_dll_handle = NULL; /* The naming is counter intuitive, but hey, I just work here -- Gabriel */ |
| char *path = NULL; |
| #if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT |
| const char *d3dcompiler; |
| #endif |
| |
| if (_this->egl_data) { |
| return SDL_SetError("OpenGL ES context already created"); |
| } |
| |
| _this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData)); |
| if (!_this->egl_data) { |
| return SDL_OutOfMemory(); |
| } |
| |
| #if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT |
| d3dcompiler = SDL_GetHint(SDL_HINT_VIDEO_WIN_D3DCOMPILER); |
| if (!d3dcompiler) { |
| /* By default we load the Vista+ compatible compiler */ |
| d3dcompiler = "d3dcompiler_46.dll"; |
| } |
| if (SDL_strcasecmp(d3dcompiler, "none") != 0) { |
| SDL_LoadObject(d3dcompiler); |
| } |
| #endif |
| |
| /* A funny thing, loading EGL.so first does not work on the Raspberry, so we load libGL* first */ |
| path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
| if (path != NULL) { |
| egl_dll_handle = SDL_LoadObject(path); |
| } |
| |
| if (egl_dll_handle == NULL) { |
| if(_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) { |
| if (_this->gl_config.major_version > 1) { |
| path = DEFAULT_OGL_ES2; |
| egl_dll_handle = SDL_LoadObject(path); |
| } |
| else { |
| path = DEFAULT_OGL_ES; |
| egl_dll_handle = SDL_LoadObject(path); |
| if (egl_dll_handle == NULL) { |
| path = DEFAULT_OGL_ES_PVR; |
| egl_dll_handle = SDL_LoadObject(path); |
| } |
| } |
| } |
| #ifdef DEFAULT_OGL |
| else { |
| path = DEFAULT_OGL; |
| egl_dll_handle = SDL_LoadObject(path); |
| } |
| #endif |
| } |
| _this->egl_data->egl_dll_handle = egl_dll_handle; |
| |
| if (egl_dll_handle == NULL) { |
| return SDL_SetError("Could not initialize OpenGL / GLES library"); |
| } |
| |
| /* Loading libGL* in the previous step took care of loading libEGL.so, but we future proof by double checking */ |
| if (egl_path != NULL) { |
| dll_handle = SDL_LoadObject(egl_path); |
| } |
| /* Try loading a EGL symbol, if it does not work try the default library paths */ |
| if (SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) { |
| if (dll_handle != NULL) { |
| SDL_UnloadObject(dll_handle); |
| } |
| path = SDL_getenv("SDL_VIDEO_EGL_DRIVER"); |
| if (path == NULL) { |
| path = DEFAULT_EGL; |
| } |
| dll_handle = SDL_LoadObject(path); |
| if (dll_handle == NULL) { |
| return SDL_SetError("Could not load EGL library"); |
| } |
| } |
| |
| _this->egl_data->dll_handle = dll_handle; |
| |
| /* 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); |
| LOAD_FUNC(eglWaitNative); |
| LOAD_FUNC(eglWaitGL); |
| LOAD_FUNC(eglBindAPI); |
| |
| _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(native_display); |
| if (!_this->egl_data->egl_display) { |
| return SDL_SetError("Could not get EGL display"); |
| } |
| |
| if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) { |
| return SDL_SetError("Could not initialize EGL"); |
| } |
| |
| _this->egl_data->dll_handle = dll_handle; |
| _this->egl_data->egl_dll_handle = egl_dll_handle; |
| _this->gl_config.driver_loaded = 1; |
| |
| if (path) { |
| SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1); |
| } else { |
| *_this->gl_config.driver_path = '\0'; |
| } |
| |
| return 0; |
| } |
| |
| int |
| SDL_EGL_ChooseConfig(_THIS) |
| { |
| /* 64 seems nice. */ |
| EGLint attribs[64]; |
| EGLint found_configs = 0, value; |
| /* 128 seems even nicer here */ |
| EGLConfig configs[128]; |
| int i, j, best_bitdiff = -1, bitdiff; |
| |
| if (!_this->egl_data) { |
| /* The EGL library wasn't loaded, SDL_GetError() should have info */ |
| return -1; |
| } |
| |
| /* Get a valid EGL configuration */ |
| 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.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) { |
| if (_this->gl_config.major_version == 2) { |
| attribs[i++] = EGL_OPENGL_ES2_BIT; |
| } else { |
| attribs[i++] = EGL_OPENGL_ES_BIT; |
| } |
| _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API); |
| } |
| else { |
| attribs[i++] = EGL_OPENGL_BIT; |
| _this->egl_data->eglBindAPI(EGL_OPENGL_API); |
| } |
| |
| attribs[i++] = EGL_NONE; |
| |
| if (_this->egl_data->eglChooseConfig(_this->egl_data->egl_display, |
| attribs, |
| configs, SDL_arraysize(configs), |
| &found_configs) == EGL_FALSE || |
| found_configs == 0) { |
| return SDL_SetError("Couldn't find matching EGL config"); |
| } |
| |
| /* eglChooseConfig returns a number of configurations that match or exceed the requested attribs. */ |
| /* From those, we select the one that matches our requirements more closely via a makeshift algorithm */ |
| |
| for ( i=0; i<found_configs; i++ ) { |
| bitdiff = 0; |
| for (j = 0; j < SDL_arraysize(attribs) - 1; j += 2) { |
| if (attribs[j] == EGL_NONE) { |
| break; |
| } |
| |
| if ( attribs[j+1] != EGL_DONT_CARE && ( |
| attribs[j] == EGL_RED_SIZE || |
| attribs[j] == EGL_GREEN_SIZE || |
| attribs[j] == EGL_BLUE_SIZE || |
| attribs[j] == EGL_ALPHA_SIZE || |
| attribs[j] == EGL_DEPTH_SIZE || |
| attribs[j] == EGL_STENCIL_SIZE)) { |
| _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], attribs[j], &value); |
| bitdiff += value - attribs[j + 1]; /* value is always >= attrib */ |
| } |
| } |
| |
| if (bitdiff < best_bitdiff || best_bitdiff == -1) { |
| _this->egl_data->egl_config = configs[i]; |
| |
| best_bitdiff = bitdiff; |
| } |
| |
| if (bitdiff == 0) break; /* we found an exact match! */ |
| } |
| |
| return 0; |
| } |
| |
| SDL_GLContext |
| SDL_EGL_CreateContext(_THIS, EGLSurface egl_surface) |
| { |
| EGLint context_attrib_list[] = { |
| EGL_CONTEXT_CLIENT_VERSION, |
| 1, |
| EGL_NONE |
| }; |
| |
| EGLContext egl_context, share_context = EGL_NO_CONTEXT; |
| |
| if (!_this->egl_data) { |
| /* The EGL library wasn't loaded, SDL_GetError() should have info */ |
| return NULL; |
| } |
| |
| if (_this->gl_config.share_with_current_context) { |
| share_context = (EGLContext)SDL_GL_GetCurrentContext(); |
| } |
| |
| /* Bind the API */ |
| if(_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) { |
| _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API); |
| if (_this->gl_config.major_version) { |
| context_attrib_list[1] = _this->gl_config.major_version; |
| } |
| |
| egl_context = _this->egl_data->eglCreateContext(_this->egl_data->egl_display, |
| _this->egl_data->egl_config, |
| share_context, context_attrib_list); |
| } |
| else { |
| _this->egl_data->eglBindAPI(EGL_OPENGL_API); |
| egl_context = _this->egl_data->eglCreateContext(_this->egl_data->egl_display, |
| _this->egl_data->egl_config, |
| share_context, NULL); |
| } |
| |
| if (egl_context == EGL_NO_CONTEXT) { |
| SDL_SetError("Could not create EGL context"); |
| return NULL; |
| } |
| |
| _this->egl_data->egl_swapinterval = 0; |
| |
| if (SDL_EGL_MakeCurrent(_this, egl_surface, egl_context) < 0) { |
| SDL_EGL_DeleteContext(_this, egl_context); |
| SDL_SetError("Could not make EGL context current"); |
| return NULL; |
| } |
| |
| return (SDL_GLContext) egl_context; |
| } |
| |
| int |
| SDL_EGL_MakeCurrent(_THIS, EGLSurface egl_surface, SDL_GLContext context) |
| { |
| EGLContext egl_context = (EGLContext) context; |
| |
| if (!_this->egl_data) { |
| return SDL_SetError("OpenGL not initialized"); |
| } |
| |
| /* The android emulator crashes badly if you try to eglMakeCurrent |
| * with a valid context and invalid surface, so we have to check for both here. |
| */ |
| if (!egl_context || !egl_surface) { |
| _this->egl_data->eglMakeCurrent(_this->egl_data->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); |
| } |
| else { |
| if (!_this->egl_data->eglMakeCurrent(_this->egl_data->egl_display, |
| egl_surface, egl_surface, egl_context)) { |
| return SDL_SetError("Unable to make EGL context current"); |
| } |
| } |
| |
| return 0; |
| } |
| |
| int |
| SDL_EGL_SetSwapInterval(_THIS, int interval) |
| { |
| EGLBoolean status; |
| |
| if (!_this->egl_data) { |
| return SDL_SetError("EGL not initialized"); |
| } |
| |
| status = _this->egl_data->eglSwapInterval(_this->egl_data->egl_display, interval); |
| if (status == EGL_TRUE) { |
| _this->egl_data->egl_swapinterval = interval; |
| return 0; |
| } |
| |
| return SDL_SetError("Unable to set the EGL swap interval"); |
| } |
| |
| int |
| SDL_EGL_GetSwapInterval(_THIS) |
| { |
| if (!_this->egl_data) { |
| return SDL_SetError("EGL not initialized"); |
| } |
| |
| return _this->egl_data->egl_swapinterval; |
| } |
| |
| void |
| SDL_EGL_SwapBuffers(_THIS, EGLSurface egl_surface) |
| { |
| _this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, egl_surface); |
| } |
| |
| void |
| SDL_EGL_DeleteContext(_THIS, SDL_GLContext context) |
| { |
| EGLContext egl_context = (EGLContext) context; |
| |
| /* Clean up GLES and EGL */ |
| if (!_this->egl_data) { |
| return; |
| } |
| |
| if (egl_context != NULL && egl_context != EGL_NO_CONTEXT) { |
| SDL_EGL_MakeCurrent(_this, NULL, NULL); |
| _this->egl_data->eglDestroyContext(_this->egl_data->egl_display, egl_context); |
| } |
| |
| } |
| |
| EGLSurface * |
| SDL_EGL_CreateSurface(_THIS, NativeWindowType nw) |
| { |
| if (SDL_EGL_ChooseConfig(_this) != 0) { |
| return EGL_NO_SURFACE; |
| } |
| |
| return _this->egl_data->eglCreateWindowSurface( |
| _this->egl_data->egl_display, |
| _this->egl_data->egl_config, |
| nw, NULL); |
| } |
| |
| void |
| SDL_EGL_DestroySurface(_THIS, EGLSurface egl_surface) |
| { |
| if (!_this->egl_data) { |
| return; |
| } |
| |
| if (egl_surface != EGL_NO_SURFACE) { |
| _this->egl_data->eglDestroySurface(_this->egl_data->egl_display, egl_surface); |
| } |
| } |
| |
| #endif /* SDL_VIDEO_OPENGL_EGL */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
| |
