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Diffstat (limited to 'src/gpu/win/SkNativeGLContext_win.cpp')
-rw-r--r-- | src/gpu/win/SkNativeGLContext_win.cpp | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/gpu/win/SkNativeGLContext_win.cpp b/src/gpu/win/SkNativeGLContext_win.cpp new file mode 100644 index 0000000..5d518dd --- /dev/null +++ b/src/gpu/win/SkNativeGLContext_win.cpp @@ -0,0 +1,137 @@ + +/* + * 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 "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) { +} + +SkNativeGLContext::~SkNativeGLContext() { + this->destroyGLContext(); +} + +void SkNativeGLContext::destroyGLContext() { + if (fGlRenderContext) { + wglDeleteContext(fGlRenderContext); + } + if (fWindow && fDeviceContext) { + ReleaseDC(fWindow, fDeviceContext); + } + if (fWindow) { + DestroyWindow(fWindow); + } +} + +const GrGLInterface* SkNativeGLContext::createGLContext() { + 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; + } + + PIXELFORMATDESCRIPTOR pfd; + ZeroMemory(&pfd, sizeof(pfd)); + pfd.nSize = sizeof(pfd); + pfd.nVersion = 1; + pfd.dwFlags = PFD_SUPPORT_OPENGL; + pfd.iPixelType = PFD_TYPE_RGBA; + pfd.cColorBits = 32; + pfd.cDepthBits = 0; + pfd.cStencilBits = 0; + pfd.iLayerType = PFD_MAIN_PLANE; + + int pixelFormat = 0; + if (!(pixelFormat = ChoosePixelFormat(fDeviceContext, &pfd))) { + SkDebugf("No matching pixel format descriptor.\n"); + this->destroyGLContext(); + return NULL; + } + + if (!SetPixelFormat(fDeviceContext, pixelFormat, &pfd)) { + SkDebugf("Could not set the pixel format %d.\n", pixelFormat); + this->destroyGLContext(); + return NULL; + } + + if (!(fGlRenderContext = wglCreateContext(fDeviceContext))) { + SkDebugf("Could not create rendering context.\n"); + this->destroyGLContext(); + return NULL; + } + + if (!(wglMakeCurrent(fDeviceContext, fGlRenderContext))) { + 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 { + if (!wglMakeCurrent(fDeviceContext, fGlRenderContext)) { + SkDebugf("Could not create rendering context.\n"); + } +} |