OLD | NEW |
(Empty) | |
| 1 |
| 2 /* |
| 3 * Copyright 2011 Google Inc. |
| 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. |
| 7 */ |
| 8 |
| 9 #include "gl/SkNativeGLContext.h" |
| 10 |
| 11 #define WIN32_LEAN_AND_MEAN |
| 12 #include <windows.h> |
| 13 |
| 14 SkNativeGLContext::AutoContextRestore::AutoContextRestore() { |
| 15 fOldHGLRC = wglGetCurrentContext(); |
| 16 fOldHDC = wglGetCurrentDC(); |
| 17 } |
| 18 |
| 19 SkNativeGLContext::AutoContextRestore::~AutoContextRestore() { |
| 20 wglMakeCurrent(fOldHDC, fOldHGLRC); |
| 21 } |
| 22 |
| 23 /////////////////////////////////////////////////////////////////////////////// |
| 24 |
| 25 ATOM SkNativeGLContext::gWC = 0; |
| 26 |
| 27 SkNativeGLContext::SkNativeGLContext() |
| 28 : fWindow(NULL) |
| 29 , fDeviceContext(NULL) |
| 30 , fGlRenderContext(0) |
| 31 , fPbufferContext(NULL) { |
| 32 } |
| 33 |
| 34 SkNativeGLContext::~SkNativeGLContext() { |
| 35 this->destroyGLContext(); |
| 36 } |
| 37 |
| 38 void SkNativeGLContext::destroyGLContext() { |
| 39 SkSafeSetNull(fPbufferContext); |
| 40 if (fGlRenderContext) { |
| 41 wglDeleteContext(fGlRenderContext); |
| 42 fGlRenderContext = 0; |
| 43 } |
| 44 if (fWindow && fDeviceContext) { |
| 45 ReleaseDC(fWindow, fDeviceContext); |
| 46 fDeviceContext = 0; |
| 47 } |
| 48 if (fWindow) { |
| 49 DestroyWindow(fWindow); |
| 50 fWindow = 0; |
| 51 } |
| 52 } |
| 53 |
| 54 const GrGLInterface* SkNativeGLContext::createGLContext(GrGLStandard forcedGpuAP
I) { |
| 55 HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(NULL); |
| 56 |
| 57 if (!gWC) { |
| 58 WNDCLASS wc; |
| 59 wc.cbClsExtra = 0; |
| 60 wc.cbWndExtra = 0; |
| 61 wc.hbrBackground = NULL; |
| 62 wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
| 63 wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); |
| 64 wc.hInstance = hInstance; |
| 65 wc.lpfnWndProc = (WNDPROC) DefWindowProc; |
| 66 wc.lpszClassName = TEXT("Griffin"); |
| 67 wc.lpszMenuName = NULL; |
| 68 wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; |
| 69 |
| 70 gWC = RegisterClass(&wc); |
| 71 if (!gWC) { |
| 72 SkDebugf("Could not register window class.\n"); |
| 73 return NULL; |
| 74 } |
| 75 } |
| 76 |
| 77 if (!(fWindow = CreateWindow(TEXT("Griffin"), |
| 78 TEXT("The Invisible Man"), |
| 79 WS_OVERLAPPEDWINDOW, |
| 80 0, 0, 1, 1, |
| 81 NULL, NULL, |
| 82 hInstance, NULL))) { |
| 83 SkDebugf("Could not create window.\n"); |
| 84 return NULL; |
| 85 } |
| 86 |
| 87 if (!(fDeviceContext = GetDC(fWindow))) { |
| 88 SkDebugf("Could not get device context.\n"); |
| 89 this->destroyGLContext(); |
| 90 return NULL; |
| 91 } |
| 92 // Requesting a Core profile would bar us from using NVPR. So we request |
| 93 // compatibility profile or GL ES. |
| 94 SkWGLContextRequest contextType = |
| 95 kGLES_GrGLStandard == forcedGpuAPI ? |
| 96 kGLES_SkWGLContextRequest : kGLPreferCompatibilityProfile_SkWGLContextRe
quest; |
| 97 |
| 98 fPbufferContext = SkWGLPbufferContext::Create(fDeviceContext, 0, contextType
); |
| 99 |
| 100 HDC dc; |
| 101 HGLRC glrc; |
| 102 |
| 103 if (NULL == fPbufferContext) { |
| 104 if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, contextTy
pe))) { |
| 105 SkDebugf("Could not create rendering context.\n"); |
| 106 this->destroyGLContext(); |
| 107 return NULL; |
| 108 } |
| 109 dc = fDeviceContext; |
| 110 glrc = fGlRenderContext; |
| 111 } else { |
| 112 ReleaseDC(fWindow, fDeviceContext); |
| 113 fDeviceContext = 0; |
| 114 DestroyWindow(fWindow); |
| 115 fWindow = 0; |
| 116 |
| 117 dc = fPbufferContext->getDC(); |
| 118 glrc = fPbufferContext->getGLRC(); |
| 119 } |
| 120 |
| 121 if (!(wglMakeCurrent(dc, glrc))) { |
| 122 SkDebugf("Could not set the context.\n"); |
| 123 this->destroyGLContext(); |
| 124 return NULL; |
| 125 } |
| 126 |
| 127 const GrGLInterface* interface = GrGLCreateNativeInterface(); |
| 128 if (NULL == interface) { |
| 129 SkDebugf("Could not create GL interface.\n"); |
| 130 this->destroyGLContext(); |
| 131 return NULL; |
| 132 } |
| 133 |
| 134 return interface; |
| 135 } |
| 136 |
| 137 void SkNativeGLContext::makeCurrent() const { |
| 138 HDC dc; |
| 139 HGLRC glrc; |
| 140 |
| 141 if (NULL == fPbufferContext) { |
| 142 dc = fDeviceContext; |
| 143 glrc = fGlRenderContext; |
| 144 } else { |
| 145 dc = fPbufferContext->getDC(); |
| 146 glrc = fPbufferContext->getGLRC(); |
| 147 } |
| 148 |
| 149 if (!wglMakeCurrent(dc, glrc)) { |
| 150 SkDebugf("Could not create rendering context.\n"); |
| 151 } |
| 152 } |
| 153 |
| 154 void SkNativeGLContext::swapBuffers() const { |
| 155 HDC dc; |
| 156 |
| 157 if (NULL == fPbufferContext) { |
| 158 dc = fDeviceContext; |
| 159 } else { |
| 160 dc = fPbufferContext->getDC(); |
| 161 } |
| 162 if (!SwapBuffers(dc)) { |
| 163 SkDebugf("Could not complete SwapBuffers.\n"); |
| 164 } |
| 165 } |
OLD | NEW |