| |
| /* |
| * 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/SkGLContext.h" |
| |
| #include <windows.h> |
| #include <GL/GL.h> |
| #include "win/SkWGL.h" |
| |
| #define WIN32_LEAN_AND_MEAN |
| #include <windows.h> |
| |
| namespace { |
| |
| class WinGLContext : public SkGLContext { |
| public: |
| WinGLContext(GrGLStandard forcedGpuAPI); |
| ~WinGLContext() override; |
| |
| private: |
| void destroyGLContext(); |
| |
| void onPlatformMakeCurrent() const override; |
| void onPlatformSwapBuffers() const override; |
| GrGLFuncPtr onPlatformGetProcAddress(const char* name) const override; |
| |
| HWND fWindow; |
| HDC fDeviceContext; |
| HGLRC fGlRenderContext; |
| static ATOM gWC; |
| SkWGLPbufferContext* fPbufferContext; |
| }; |
| |
| ATOM WinGLContext::gWC = 0; |
| |
| WinGLContext::WinGLContext(GrGLStandard forcedGpuAPI) |
| : fWindow(nullptr) |
| , fDeviceContext(nullptr) |
| , fGlRenderContext(0) |
| , fPbufferContext(nullptr) { |
| HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(nullptr); |
| |
| if (!gWC) { |
| WNDCLASS wc; |
| wc.cbClsExtra = 0; |
| wc.cbWndExtra = 0; |
| wc.hbrBackground = nullptr; |
| wc.hCursor = LoadCursor(nullptr, IDC_ARROW); |
| wc.hIcon = LoadIcon(nullptr, IDI_APPLICATION); |
| wc.hInstance = hInstance; |
| wc.lpfnWndProc = (WNDPROC) DefWindowProc; |
| wc.lpszClassName = TEXT("Griffin"); |
| wc.lpszMenuName = nullptr; |
| wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; |
| |
| gWC = RegisterClass(&wc); |
| if (!gWC) { |
| SkDebugf("Could not register window class.\n"); |
| return; |
| } |
| } |
| |
| if (!(fWindow = CreateWindow(TEXT("Griffin"), |
| TEXT("The Invisible Man"), |
| WS_OVERLAPPEDWINDOW, |
| 0, 0, 1, 1, |
| nullptr, nullptr, |
| hInstance, nullptr))) { |
| SkDebugf("Could not create window.\n"); |
| return; |
| } |
| |
| if (!(fDeviceContext = GetDC(fWindow))) { |
| SkDebugf("Could not get device context.\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| // 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 (nullptr == fPbufferContext) { |
| if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, contextType))) { |
| SkDebugf("Could not create rendering context.\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| 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; |
| } |
| |
| SkAutoTUnref<const GrGLInterface> gl(GrGLCreateNativeInterface()); |
| if (nullptr == gl.get()) { |
| SkDebugf("Could not create GL interface.\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| if (!gl->validate()) { |
| SkDebugf("Could not validate GL interface.\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| |
| this->init(gl.detach()); |
| } |
| |
| WinGLContext::~WinGLContext() { |
| this->teardown(); |
| this->destroyGLContext(); |
| } |
| |
| void WinGLContext::destroyGLContext() { |
| SkSafeSetNull(fPbufferContext); |
| if (fGlRenderContext) { |
| wglDeleteContext(fGlRenderContext); |
| fGlRenderContext = 0; |
| } |
| if (fWindow && fDeviceContext) { |
| ReleaseDC(fWindow, fDeviceContext); |
| fDeviceContext = 0; |
| } |
| if (fWindow) { |
| DestroyWindow(fWindow); |
| fWindow = 0; |
| } |
| } |
| |
| void WinGLContext::onPlatformMakeCurrent() const { |
| HDC dc; |
| HGLRC glrc; |
| |
| if (nullptr == fPbufferContext) { |
| dc = fDeviceContext; |
| glrc = fGlRenderContext; |
| } else { |
| dc = fPbufferContext->getDC(); |
| glrc = fPbufferContext->getGLRC(); |
| } |
| |
| if (!wglMakeCurrent(dc, glrc)) { |
| SkDebugf("Could not create rendering context.\n"); |
| } |
| } |
| |
| void WinGLContext::onPlatformSwapBuffers() const { |
| HDC dc; |
| |
| if (nullptr == fPbufferContext) { |
| dc = fDeviceContext; |
| } else { |
| dc = fPbufferContext->getDC(); |
| } |
| if (!SwapBuffers(dc)) { |
| SkDebugf("Could not complete SwapBuffers.\n"); |
| } |
| } |
| |
| GrGLFuncPtr WinGLContext::onPlatformGetProcAddress(const char* name) const { |
| return reinterpret_cast<GrGLFuncPtr>(wglGetProcAddress(name)); |
| } |
| |
| } // anonymous namespace |
| |
| SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* shareContext) { |
| SkASSERT(!shareContext); |
| if (shareContext) { |
| return nullptr; |
| } |
| WinGLContext* ctx = new WinGLContext(forcedGpuAPI); |
| if (!ctx->isValid()) { |
| delete ctx; |
| return nullptr; |
| } |
| return ctx; |
| } |
| |