diff options
Diffstat (limited to 'Source/external/SDL2/src/video/directfb/SDL_DirectFB_opengl.c')
| -rw-r--r-- | Source/external/SDL2/src/video/directfb/SDL_DirectFB_opengl.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/video/directfb/SDL_DirectFB_opengl.c b/Source/external/SDL2/src/video/directfb/SDL_DirectFB_opengl.c new file mode 100644 index 0000000..93d2fde --- /dev/null +++ b/Source/external/SDL2/src/video/directfb/SDL_DirectFB_opengl.c @@ -0,0 +1,332 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 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_OPENGL_LIBRARY"); + if (path == NULL) { + path = "libGL.so.1"; + } + } + + 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; + 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 = 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; +#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; +} + +int +DirectFB_GL_SwapWindow(_THIS, SDL_Window * window) +{ + SDL_DFB_WINDOWDATA(window); + DirectFB_GLContext *p; + +#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 0; + error: + return -1; +} + +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: */ |