| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gl/SkNativeGLContext.h" |
| |
| #define WIN32_LEAN_AND_MEAN |
| #include <windows.h> |
| |
| SkNativeGLContext::AutoContextRestore::AutoContextRestore() { |
| fOldHGLRC = wglGetCurrentContext(); |
| fOldHDC = wglGetCurrentDC(); |
| } |
| |
| SkNativeGLContext::AutoContextRestore::~AutoContextRestore() { |
| wglMakeCurrent(fOldHDC, fOldHGLRC); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| ATOM SkNativeGLContext::gWC = 0; |
| |
| SkNativeGLContext::SkNativeGLContext() |
| : fWindow(NULL) |
| , fDeviceContext(NULL) |
| , fGlRenderContext(0) |
| , fPbufferContext(NULL) { |
| } |
| |
| SkNativeGLContext::~SkNativeGLContext() { |
| this->destroyGLContext(); |
| } |
| |
| void SkNativeGLContext::destroyGLContext() { |
| SkSafeSetNull(fPbufferContext); |
| if (fGlRenderContext) { |
| wglDeleteContext(fGlRenderContext); |
| fGlRenderContext = 0; |
| } |
| if (fWindow && fDeviceContext) { |
| ReleaseDC(fWindow, fDeviceContext); |
| fDeviceContext = 0; |
| } |
| if (fWindow) { |
| DestroyWindow(fWindow); |
| fWindow = 0; |
| } |
| } |
| |
| const GrGLInterface* SkNativeGLContext::createGLContext(GrGLStandard forcedGpuAPI) { |
| HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(NULL); |
| |
| if (!gWC) { |
| WNDCLASS wc; |
| wc.cbClsExtra = 0; |
| wc.cbWndExtra = 0; |
| wc.hbrBackground = NULL; |
| wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
| wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); |
| wc.hInstance = hInstance; |
| wc.lpfnWndProc = (WNDPROC) DefWindowProc; |
| wc.lpszClassName = TEXT("Griffin"); |
| wc.lpszMenuName = NULL; |
| wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; |
| |
| gWC = RegisterClass(&wc); |
| if (!gWC) { |
| SkDebugf("Could not register window class.\n"); |
| return NULL; |
| } |
| } |
| |
| if (!(fWindow = CreateWindow(TEXT("Griffin"), |
| TEXT("The Invisible Man"), |
| WS_OVERLAPPEDWINDOW, |
| 0, 0, 1, 1, |
| NULL, NULL, |
| hInstance, NULL))) { |
| SkDebugf("Could not create window.\n"); |
| return NULL; |
| } |
| |
| if (!(fDeviceContext = GetDC(fWindow))) { |
| SkDebugf("Could not get device context.\n"); |
| this->destroyGLContext(); |
| return NULL; |
| } |
| // Requesting a Core profile would bar us from using NVPR. So we request |
| // compatibility profile or GL ES. |
| SkWGLContextRequest contextType = |
| kGLES_GrGLStandard == forcedGpuAPI ? |
| kGLES_SkWGLContextRequest : kGLPreferCompatibilityProfile_SkWGLContextRequest; |
| |
| fPbufferContext = SkWGLPbufferContext::Create(fDeviceContext, 0, contextType); |
| |
| HDC dc; |
| HGLRC glrc; |
| |
| if (NULL == fPbufferContext) { |
| if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, contextType))) { |
| SkDebugf("Could not create rendering context.\n"); |
| this->destroyGLContext(); |
| return NULL; |
| } |
| dc = fDeviceContext; |
| glrc = fGlRenderContext; |
| } else { |
| ReleaseDC(fWindow, fDeviceContext); |
| fDeviceContext = 0; |
| DestroyWindow(fWindow); |
| fWindow = 0; |
| |
| dc = fPbufferContext->getDC(); |
| glrc = fPbufferContext->getGLRC(); |
| } |
| |
| if (!(wglMakeCurrent(dc, glrc))) { |
| SkDebugf("Could not set the context.\n"); |
| this->destroyGLContext(); |
| return NULL; |
| } |
| |
| const GrGLInterface* interface = GrGLCreateNativeInterface(); |
| if (NULL == interface) { |
| SkDebugf("Could not create GL interface.\n"); |
| this->destroyGLContext(); |
| return NULL; |
| } |
| |
| return interface; |
| } |
| |
| void SkNativeGLContext::makeCurrent() const { |
| HDC dc; |
| HGLRC glrc; |
| |
| if (NULL == fPbufferContext) { |
| dc = fDeviceContext; |
| glrc = fGlRenderContext; |
| } else { |
| dc = fPbufferContext->getDC(); |
| glrc = fPbufferContext->getGLRC(); |
| } |
| |
| if (!wglMakeCurrent(dc, glrc)) { |
| SkDebugf("Could not create rendering context.\n"); |
| } |
| } |
| |
| void SkNativeGLContext::swapBuffers() const { |
| HDC dc; |
| |
| if (NULL == fPbufferContext) { |
| dc = fDeviceContext; |
| } else { |
| dc = fPbufferContext->getDC(); |
| } |
| if (!SwapBuffers(dc)) { |
| SkDebugf("Could not complete SwapBuffers.\n"); |
| } |
| } |