diff --git a/src/video/SDL_sysvideo.h b/src/video/SDL_sysvideo.h index 42ade5e7d7..c8cd3991cf 100644 --- a/src/video/SDL_sysvideo.h +++ b/src/video/SDL_sysvideo.h @@ -455,6 +455,7 @@ struct SDL_VideoDevice int retained_backing; int egl_platform; int driver_loaded; + int HAS_GL_ARB_color_buffer_float; char driver_path[256]; SDL_SharedObject *dll_handle; } gl_config; diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c index 72b6149f44..1fd398bed7 100644 --- a/src/video/SDL_video.c +++ b/src/video/SDL_video.c @@ -75,6 +75,10 @@ #include #endif +#ifndef GL_RGBA_FLOAT_MODE_ARB +#define GL_RGBA_FLOAT_MODE_ARB 0x8820 +#endif /* GL_RGBA_FLOAT_MODE_ARB */ + // Available video drivers static VideoBootStrap *bootstrap[] = { #ifdef SDL_VIDEO_DRIVER_PRIVATE @@ -5124,6 +5128,15 @@ bool SDL_GL_GetAttribute(SDL_GLAttr attr, int *value) *value = _this->gl_config.egl_platform; return true; } + case SDL_GL_FLOATBUFFERS: + { + if (_this->gl_config.HAS_GL_ARB_color_buffer_float) { + attrib = GL_RGBA_FLOAT_MODE_ARB; + break; + } else { + return 0; + } + } default: return SDL_SetError("Unknown OpenGL attribute"); } diff --git a/src/video/windows/SDL_windowsopengl.c b/src/video/windows/SDL_windowsopengl.c index c458796044..a2d80e7265 100644 --- a/src/video/windows/SDL_windowsopengl.c +++ b/src/video/windows/SDL_windowsopengl.c @@ -510,6 +510,10 @@ void WIN_GL_InitExtensions(SDL_VideoDevice *_this) _this->gl_data->HAS_WGL_ARB_create_context_no_error = true; } + /* Check for WGL_ARB_pixel_format_float */ + _this->gl_data->HAS_WGL_ARB_pixel_format_float = + HasExtension("WGL_ARB_pixel_format_float", extensions); + _this->gl_data->wglMakeCurrent(hdc, NULL); _this->gl_data->wglDeleteContext(hglrc); ReleaseDC(hwnd, hdc); @@ -640,7 +644,7 @@ static bool WIN_GL_SetupWindowInternal(SDL_VideoDevice *_this, SDL_Window *windo *iAttr++ = _this->gl_config.multisamplesamples; } - if (_this->gl_config.floatbuffers) { + if (_this->gl_data->HAS_WGL_ARB_pixel_format_float && _this->gl_config.floatbuffers) { *iAttr++ = WGL_PIXEL_TYPE_ARB; *iAttr++ = WGL_TYPE_RGBA_FLOAT_ARB; } @@ -825,6 +829,9 @@ SDL_GLContext WIN_GL_CreateContext(SDL_VideoDevice *_this, SDL_Window *window) return NULL; } + _this->gl_config.HAS_GL_ARB_color_buffer_float = + SDL_GL_ExtensionSupported("GL_ARB_color_buffer_float"); + return (SDL_GLContext)context; } diff --git a/src/video/windows/SDL_windowsopengl.h b/src/video/windows/SDL_windowsopengl.h index 23e2f3a58f..a4359611c2 100644 --- a/src/video/windows/SDL_windowsopengl.h +++ b/src/video/windows/SDL_windowsopengl.h @@ -64,6 +64,7 @@ struct SDL_GLDriverData bool HAS_WGL_ARB_context_flush_control; bool HAS_WGL_ARB_create_context_robustness; bool HAS_WGL_ARB_create_context_no_error; + bool HAS_WGL_ARB_pixel_format_float; /* Max version of OpenGL ES context that can be created if the implementation supports WGL_EXT_create_context_es2_profile.