SDL_GLContext WIN_GL_CreateContext(_THIS, SDL_Window * window) { HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc; HGLRC context; if (_this->gl_config.major_version < 3) { context = _this->gl_data->wglCreateContext(hdc); } else { PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB; HGLRC temp_context = _this->gl_data->wglCreateContext(hdc); if (!temp_context) { SDL_SetError("Could not create GL context"); return NULL; } /* Make the context current */ if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) { WIN_GL_DeleteContext(_this, temp_context); return NULL; } wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data-> wglGetProcAddress("wglCreateContextAttribsARB"); if (!wglCreateContextAttribsARB) { SDL_SetError("GL 3.x is not supported"); context = temp_context; } else { int attribs[] = { WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version, WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version, 0 }; /* Create the GL 3.x context */ context = wglCreateContextAttribsARB(hdc, 0, attribs); /* Delete the GL 2.x context */ _this->gl_data->wglDeleteContext(temp_context); } } if (!context) { WIN_SetError("Could not create GL context"); return NULL; } if (WIN_GL_MakeCurrent(_this, window, context) < 0) { WIN_GL_DeleteContext(_this, context); return NULL; } WIN_GL_InitExtensions(_this, hdc); return context; }
static int WIN_GL_ChoosePixelFormatARB(_THIS, int *iAttribs, float *fAttribs) { HWND hwnd; HDC hdc; PIXELFORMATDESCRIPTOR pfd; HGLRC hglrc; int pixel_format = 0; unsigned int matching; hwnd = CreateWindow(SDL_Appname, SDL_Appname, (WS_POPUP | WS_DISABLED), 0, 0, 10, 10, NULL, NULL, SDL_Instance, NULL); WIN_PumpEvents(_this); hdc = GetDC(hwnd); WIN_GL_SetupPixelFormat(_this, &pfd); SetPixelFormat(hdc, ChoosePixelFormat(hdc, &pfd), &pfd); hglrc = _this->gl_data->wglCreateContext(hdc); if (hglrc) { _this->gl_data->wglMakeCurrent(hdc, hglrc); WIN_GL_InitExtensions(_this, hdc); if (_this->gl_data->WGL_ARB_pixel_format) { _this->gl_data->wglChoosePixelFormatARB(hdc, iAttribs, fAttribs, 1, &pixel_format, &matching); } _this->gl_data->wglMakeCurrent(NULL, NULL); _this->gl_data->wglDeleteContext(hglrc); } ReleaseDC(hwnd, hdc); DestroyWindow(hwnd); WIN_PumpEvents(_this); return pixel_format; }
int WIN_CreateWindow(_THIS, SDL_Window * window) { HWND hwnd; RECT rect; DWORD style = STYLE_BASIC; int x, y; int w, h; style |= GetWindowStyle(window); /* Figure out what the window area will be */ rect.left = window->x; rect.top = window->y; rect.right = window->x + window->w; rect.bottom = window->y + window->h; AdjustWindowRectEx(&rect, style, FALSE, 0); x = rect.left; y = rect.top; w = (rect.right - rect.left); h = (rect.bottom - rect.top); hwnd = CreateWindow(SDL_Appname, TEXT(""), style, x, y, w, h, NULL, NULL, SDL_Instance, NULL); if (!hwnd) { return WIN_SetError("Couldn't create window"); } WIN_PumpEvents(_this); if (SetupWindowData(_this, window, hwnd, SDL_TRUE) < 0) { DestroyWindow(hwnd); return -1; } #if SDL_VIDEO_OPENGL_WGL /* We need to initialize the extensions before deciding how to create ES profiles */ if (window->flags & SDL_WINDOW_OPENGL) { WIN_GL_InitExtensions(_this); } #endif #if SDL_VIDEO_OPENGL_ES2 if ((window->flags & SDL_WINDOW_OPENGL) && _this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES #if SDL_VIDEO_OPENGL_WGL && (!_this->gl_data || !_this->gl_data->HAS_WGL_EXT_create_context_es2_profile) #endif ) { #if SDL_VIDEO_OPENGL_EGL if (WIN_GLES_SetupWindow(_this, window) < 0) { WIN_DestroyWindow(_this, window); return -1; } #else return SDL_SetError("Could not create GLES window surface (no EGL support available)"); #endif /* SDL_VIDEO_OPENGL_EGL */ } else #endif /* SDL_VIDEO_OPENGL_ES2 */ #if SDL_VIDEO_OPENGL_WGL if (window->flags & SDL_WINDOW_OPENGL) { if (WIN_GL_SetupWindow(_this, window) < 0) { WIN_DestroyWindow(_this, window); return -1; } } #endif return 0; }
SDL_GLContext WIN_GL_CreateContext(_THIS, SDL_Window * window) { HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc; HGLRC context, share_context; if (_this->gl_config.share_with_current_context) { share_context = (HGLRC)(_this->current_glctx); } else { share_context = 0; } if (_this->gl_config.major_version < 3 && _this->gl_config.profile_mask == 0 && _this->gl_config.flags == 0) { /* Create legacy context */ context = _this->gl_data->wglCreateContext(hdc); if( share_context != 0 ) { _this->gl_data->wglShareLists(share_context, hdc); } } else { PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB; HGLRC temp_context = _this->gl_data->wglCreateContext(hdc); if (!temp_context) { SDL_SetError("Could not create GL context"); return NULL; } /* Make the context current */ if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) { WIN_GL_DeleteContext(_this, temp_context); return NULL; } wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data-> wglGetProcAddress("wglCreateContextAttribsARB"); if (!wglCreateContextAttribsARB) { SDL_SetError("GL 3.x is not supported"); context = temp_context; } else { /* max 8 attributes plus terminator */ int attribs[9] = { WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version, WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version, 0 }; int iattr = 4; /* SDL profile bits match WGL profile bits */ if( _this->gl_config.profile_mask != 0 ) { attribs[iattr++] = WGL_CONTEXT_PROFILE_MASK_ARB; attribs[iattr++] = _this->gl_config.profile_mask; } /* SDL flags match WGL flags */ if( _this->gl_config.flags != 0 ) { attribs[iattr++] = WGL_CONTEXT_FLAGS_ARB; attribs[iattr++] = _this->gl_config.flags; } attribs[iattr++] = 0; /* Create the GL 3.x context */ context = wglCreateContextAttribsARB(hdc, share_context, attribs); /* Delete the GL 2.x context */ _this->gl_data->wglDeleteContext(temp_context); } } if (!context) { WIN_SetError("Could not create GL context"); return NULL; } if (WIN_GL_MakeCurrent(_this, window, context) < 0) { WIN_GL_DeleteContext(_this, context); return NULL; } WIN_GL_InitExtensions(_this, hdc); return context; }