| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2011 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| |
| Open Pandora SDL driver |
| Copyright (C) 2009 David Carré |
| (cpasjuste@gmail.com) |
| */ |
| #include "SDL_config.h" |
| |
| #if SDL_VIDEO_OPENGL_ES |
| |
| #include "SDL_x11video.h" |
| #include "SDL_x11opengles.h" |
| |
| #define DEFAULT_OPENGL "/usr/lib/libGLES_CM.so" |
| |
| #define LOAD_FUNC(NAME) \ |
| *((void**)&_this->gles_data->NAME) = dlsym(handle, #NAME); \ |
| if (!_this->gles_data->NAME) \ |
| { \ |
| SDL_SetError("Could not retrieve EGL function " #NAME); \ |
| return -1; \ |
| } |
| |
| /* GLES implementation of SDL OpenGL support */ |
| |
| void * |
| X11_GLES_GetProcAddress(_THIS, const char *proc) |
| { |
| static char procname[1024]; |
| void *handle; |
| void *retval; |
| |
| handle = _this->gl_config.dll_handle; |
| if (_this->gles_data->eglGetProcAddress) { |
| retval = _this->gles_data->eglGetProcAddress(proc); |
| if (retval) { |
| return retval; |
| } |
| } |
| #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->gl_config.driver_loaded) { |
| _this->gles_data->eglTerminate(_this->gles_data->egl_display); |
| |
| dlclose(_this->gl_config.dll_handle); |
| |
| _this->gles_data->eglGetProcAddress = NULL; |
| _this->gles_data->eglChooseConfig = NULL; |
| _this->gles_data->eglCreateContext = NULL; |
| _this->gles_data->eglCreateWindowSurface = NULL; |
| _this->gles_data->eglDestroyContext = NULL; |
| _this->gles_data->eglDestroySurface = NULL; |
| _this->gles_data->eglMakeCurrent = NULL; |
| _this->gles_data->eglSwapBuffers = NULL; |
| _this->gles_data->eglGetDisplay = NULL; |
| _this->gles_data->eglTerminate = 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->egl_active) { |
| SDL_SetError("OpenGL ES context already created"); |
| return -1; |
| } |
| #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_GL_DRIVER"); |
| if (path == NULL) { |
| path = DEFAULT_OPENGL; |
| } |
| handle = dlopen(path, dlopen_flags); |
| } |
| |
| if (handle == NULL) { |
| SDL_SetError("Could not load OpenGL ES/EGL library"); |
| return -1; |
| } |
| |
| /* Unload the old driver and reset the pointers */ |
| X11_GLES_UnloadLibrary(_this); |
| |
| /* 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); |
| |
| _this->gles_data->egl_display = |
| _this->gles_data->eglGetDisplay((NativeDisplayType) data->display); |
| |
| if (!_this->gles_data->egl_display) { |
| SDL_SetError("Could not get EGL display"); |
| return -1; |
| } |
| |
| if (_this->gles_data-> |
| eglInitialize(_this->gles_data->egl_display, NULL, |
| NULL) != EGL_TRUE) { |
| SDL_SetError("Could not initialize EGL"); |
| return -1; |
| } |
| |
| _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; |
| VisualID visual_id; |
| int i; |
| |
| /* load the gl driver from a default path */ |
| if (!_this->gl_config.driver_loaded) { |
| /* no driver has been loaded, use default (ourselves) */ |
| if (X11_GLES_LoadLibrary(_this, NULL) < 0) { |
| 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_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, |
| (EGLint *) & 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) |
| { |
| int retval; |
| SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| Display *display = data->videodata->display; |
| |
| XSync(display, False); |
| |
| |
| _this->gles_data->egl_context = |
| _this->gles_data->eglCreateContext(_this->gles_data->egl_display, |
| _this->gles_data->egl_config, |
| EGL_NO_CONTEXT, NULL); |
| 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_active = 1; |
| |
| if (_this->gles_data->egl_active) |
| retval = 1; |
| else |
| retval = 0; |
| |
| return (retval); |
| } |
| |
| int |
| X11_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) |
| { |
| int retval; |
| |
| // SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| // Display *display = data->videodata->display; |
| |
| retval = 1; |
| 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)) { |
| SDL_SetError("Unable to make EGL context current"); |
| retval = -1; |
| } |
| // XSync(display, False); |
| |
| return (retval); |
| } |
| |
| static int swapinterval = -1; |
| int |
| X11_GLES_SetSwapInterval(_THIS, int interval) |
| { |
| return 0; |
| } |
| |
| int |
| X11_GLES_GetSwapInterval(_THIS) |
| { |
| return 0; |
| } |
| |
| 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->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; |
| } |
| } |
| _this->gles_data->egl_active = 0; |
| |
| /* crappy fix */ |
| X11_GLES_UnloadLibrary(_this); |
| |
| } |
| |
| #endif /* SDL_VIDEO_OPENGL_ES */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
