Virtualize SkGLContext with subclasses SkNativeGLContext and SkMesaGLContext, allow both in gm
Review URL: http://codereview.appspot.com/5307045/
git-svn-id: http://skia.googlecode.com/svn/trunk@2499 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/win/SkNativeGLContext_win.cpp b/src/gpu/win/SkNativeGLContext_win.cpp
new file mode 100644
index 0000000..c19f7cc
--- /dev/null
+++ b/src/gpu/win/SkNativeGLContext_win.cpp
@@ -0,0 +1,126 @@
+
+/*
+ * 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>
+
+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");
+ }
+}