| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2016 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_internal.h" |
| |
| #if SDL_VIDEO_DRIVER_DIRECTFB |
| |
| #include "SDL_DirectFB_video.h" |
| |
| #if SDL_DIRECTFB_OPENGL |
| |
| #include "SDL_DirectFB_opengl.h" |
| #include "SDL_DirectFB_window.h" |
| |
| #include <directfbgl.h> |
| #include "SDL_loadso.h" |
| #endif |
| |
| #if SDL_DIRECTFB_OPENGL |
| |
| struct SDL_GLDriverData |
| { |
| int gl_active; /* to stop switching drivers while we have a valid context */ |
| int initialized; |
| DirectFB_GLContext *firstgl; /* linked list */ |
| |
| /* OpenGL */ |
| void (*glFinish) (void); |
| void (*glFlush) (void); |
| }; |
| |
| #define OPENGL_REQUIRS_DLOPEN |
| #if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN) |
| #include <dlfcn.h> |
| #define GL_LoadObject(X) dlopen(X, (RTLD_NOW|RTLD_GLOBAL)) |
| #define GL_LoadFunction dlsym |
| #define GL_UnloadObject dlclose |
| #else |
| #define GL_LoadObject SDL_LoadObject |
| #define GL_LoadFunction SDL_LoadFunction |
| #define GL_UnloadObject SDL_UnloadObject |
| #endif |
| |
| static void DirectFB_GL_UnloadLibrary(_THIS); |
| |
| int |
| DirectFB_GL_Initialize(_THIS) |
| { |
| if (_this->gl_data) { |
| return 0; |
| } |
| |
| _this->gl_data = |
| (struct SDL_GLDriverData *) SDL_calloc(1, |
| sizeof(struct |
| SDL_GLDriverData)); |
| if (!_this->gl_data) { |
| return SDL_OutOfMemory(); |
| } |
| _this->gl_data->initialized = 0; |
| |
| ++_this->gl_data->initialized; |
| _this->gl_data->firstgl = NULL; |
| |
| if (DirectFB_GL_LoadLibrary(_this, NULL) < 0) { |
| return -1; |
| } |
| |
| /* Initialize extensions */ |
| /* FIXME needed? |
| * X11_GL_InitExtensions(_this); |
| */ |
| |
| return 0; |
| } |
| |
| void |
| DirectFB_GL_Shutdown(_THIS) |
| { |
| if (!_this->gl_data || (--_this->gl_data->initialized > 0)) { |
| return; |
| } |
| |
| DirectFB_GL_UnloadLibrary(_this); |
| |
| SDL_free(_this->gl_data); |
| _this->gl_data = NULL; |
| } |
| |
| int |
| DirectFB_GL_LoadLibrary(_THIS, const char *path) |
| { |
| void *handle = NULL; |
| |
| SDL_DFB_DEBUG("Loadlibrary : %s\n", path); |
| |
| if (_this->gl_data->gl_active) { |
| return SDL_SetError("OpenGL context already created"); |
| } |
| |
| |
| if (path == NULL) { |
| path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
| if (path == NULL) { |
| path = "libGL.so"; |
| } |
| } |
| |
| handle = GL_LoadObject(path); |
| if (handle == NULL) { |
| SDL_DFB_ERR("Library not found: %s\n", path); |
| /* SDL_LoadObject() will call SDL_SetError() for us. */ |
| return -1; |
| } |
| |
| SDL_DFB_DEBUG("Loaded library: %s\n", path); |
| |
| _this->gl_config.dll_handle = handle; |
| _this->gl_config.driver_loaded = 1; |
| if (path) { |
| SDL_strlcpy(_this->gl_config.driver_path, path, |
| SDL_arraysize(_this->gl_config.driver_path)); |
| } else { |
| *_this->gl_config.driver_path = '\0'; |
| } |
| |
| _this->gl_data->glFinish = DirectFB_GL_GetProcAddress(_this, "glFinish"); |
| _this->gl_data->glFlush = DirectFB_GL_GetProcAddress(_this, "glFlush"); |
| |
| return 0; |
| } |
| |
| static void |
| DirectFB_GL_UnloadLibrary(_THIS) |
| { |
| #if 0 |
| int ret; |
| |
| if (_this->gl_config.driver_loaded) { |
| |
| ret = GL_UnloadObject(_this->gl_config.dll_handle); |
| if (ret) |
| SDL_DFB_ERR("Error #%d trying to unload library.\n", ret); |
| _this->gl_config.dll_handle = NULL; |
| _this->gl_config.driver_loaded = 0; |
| } |
| #endif |
| /* Free OpenGL memory */ |
| SDL_free(_this->gl_data); |
| _this->gl_data = NULL; |
| } |
| |
| void * |
| DirectFB_GL_GetProcAddress(_THIS, const char *proc) |
| { |
| void *handle; |
| |
| handle = _this->gl_config.dll_handle; |
| return GL_LoadFunction(handle, proc); |
| } |
| |
| SDL_GLContext |
| DirectFB_GL_CreateContext(_THIS, SDL_Window * window) |
| { |
| SDL_DFB_WINDOWDATA(window); |
| DirectFB_GLContext *context; |
| |
| SDL_DFB_ALLOC_CLEAR(context, sizeof(DirectFB_GLContext)); |
| |
| SDL_DFB_CHECKERR(windata->surface->GetGL(windata->surface, |
| &context->context)); |
| |
| if (!context->context) |
| return NULL; |
| |
| context->is_locked = 0; |
| context->sdl_window = window; |
| |
| context->next = _this->gl_data->firstgl; |
| _this->gl_data->firstgl = context; |
| |
| SDL_DFB_CHECK(context->context->Unlock(context->context)); |
| |
| if (DirectFB_GL_MakeCurrent(_this, window, context) < 0) { |
| DirectFB_GL_DeleteContext(_this, context); |
| return NULL; |
| } |
| |
| return context; |
| |
| error: |
| return NULL; |
| } |
| |
| int |
| DirectFB_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) |
| { |
| DirectFB_GLContext *ctx = (DirectFB_GLContext *) context; |
| DirectFB_GLContext *p; |
| |
| for (p = _this->gl_data->firstgl; p; p = p->next) |
| { |
| if (p->is_locked) { |
| SDL_DFB_CHECKERR(p->context->Unlock(p->context)); |
| p->is_locked = 0; |
| } |
| |
| } |
| |
| if (ctx != NULL) { |
| SDL_DFB_CHECKERR(ctx->context->Lock(ctx->context)); |
| ctx->is_locked = 1; |
| } |
| |
| return 0; |
| error: |
| return -1; |
| } |
| |
| int |
| DirectFB_GL_SetSwapInterval(_THIS, int interval) |
| { |
| return SDL_Unsupported(); |
| } |
| |
| int |
| DirectFB_GL_GetSwapInterval(_THIS) |
| { |
| return 0; |
| } |
| |
| void |
| DirectFB_GL_SwapWindow(_THIS, SDL_Window * window) |
| { |
| SDL_DFB_WINDOWDATA(window); |
| DFBRegion region; |
| DirectFB_GLContext *p; |
| |
| region.x1 = 0; |
| region.y1 = 0; |
| region.x2 = window->w; |
| region.y2 = window->h; |
| |
| #if 0 |
| if (devdata->glFinish) |
| devdata->glFinish(); |
| else if (devdata->glFlush) |
| devdata->glFlush(); |
| #endif |
| |
| for (p = _this->gl_data->firstgl; p != NULL; p = p->next) |
| if (p->sdl_window == window && p->is_locked) |
| { |
| SDL_DFB_CHECKERR(p->context->Unlock(p->context)); |
| p->is_locked = 0; |
| } |
| |
| SDL_DFB_CHECKERR(windata->window_surface->Flip(windata->window_surface,NULL, DSFLIP_PIPELINE |DSFLIP_BLIT | DSFLIP_ONSYNC )); |
| return; |
| error: |
| return; |
| } |
| |
| void |
| DirectFB_GL_DeleteContext(_THIS, SDL_GLContext context) |
| { |
| DirectFB_GLContext *ctx = (DirectFB_GLContext *) context; |
| DirectFB_GLContext *p; |
| |
| if (ctx->is_locked) |
| SDL_DFB_CHECK(ctx->context->Unlock(ctx->context)); |
| SDL_DFB_RELEASE(ctx->context); |
| |
| for (p = _this->gl_data->firstgl; p && p->next != ctx; p = p->next) |
| ; |
| if (p) |
| p->next = ctx->next; |
| else |
| _this->gl_data->firstgl = ctx->next; |
| |
| SDL_DFB_FREE(ctx); |
| } |
| |
| void |
| DirectFB_GL_FreeWindowContexts(_THIS, SDL_Window * window) |
| { |
| DirectFB_GLContext *p; |
| |
| for (p = _this->gl_data->firstgl; p != NULL; p = p->next) |
| if (p->sdl_window == window) |
| { |
| if (p->is_locked) |
| SDL_DFB_CHECK(p->context->Unlock(p->context)); |
| SDL_DFB_RELEASE(p->context); |
| } |
| } |
| |
| void |
| DirectFB_GL_ReAllocWindowContexts(_THIS, SDL_Window * window) |
| { |
| DirectFB_GLContext *p; |
| |
| for (p = _this->gl_data->firstgl; p != NULL; p = p->next) |
| if (p->sdl_window == window) |
| { |
| SDL_DFB_WINDOWDATA(window); |
| SDL_DFB_CHECK(windata->surface->GetGL(windata->surface, |
| &p->context)); |
| if (p->is_locked) |
| SDL_DFB_CHECK(p->context->Lock(p->context)); |
| } |
| } |
| |
| void |
| DirectFB_GL_DestroyWindowContexts(_THIS, SDL_Window * window) |
| { |
| DirectFB_GLContext *p; |
| |
| for (p = _this->gl_data->firstgl; p != NULL; p = p->next) |
| if (p->sdl_window == window) |
| DirectFB_GL_DeleteContext(_this, p); |
| } |
| |
| #endif |
| |
| #endif /* SDL_VIDEO_DRIVER_DIRECTFB */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |