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| 1 /* |
| 2 * Copyright 2011 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "gl/SkGLContext.h" |
| 9 |
| 10 #include <windows.h> |
| 11 #include <GL/GL.h> |
| 12 #include "win/SkWGL.h" |
| 13 |
| 14 #define WIN32_LEAN_AND_MEAN |
| 15 #include <windows.h> |
| 16 |
| 17 namespace { |
| 18 |
| 19 class WinGLContext : public SkGLContext { |
| 20 public: |
| 21 WinGLContext(GrGLStandard forcedGpuAPI); |
| 22 ~WinGLContext() override; |
| 23 |
| 24 private: |
| 25 void destroyGLContext(); |
| 26 |
| 27 void onPlatformMakeCurrent() const override; |
| 28 void onPlatformSwapBuffers() const override; |
| 29 GrGLFuncPtr onPlatformGetProcAddress(const char* name) const override; |
| 30 |
| 31 HWND fWindow; |
| 32 HDC fDeviceContext; |
| 33 HGLRC fGlRenderContext; |
| 34 static ATOM gWC; |
| 35 SkWGLPbufferContext* fPbufferContext; |
| 36 }; |
| 37 |
| 38 ATOM WinGLContext::gWC = 0; |
| 39 |
| 40 WinGLContext::WinGLContext(GrGLStandard forcedGpuAPI) |
| 41 : fWindow(nullptr) |
| 42 , fDeviceContext(nullptr) |
| 43 , fGlRenderContext(0) |
| 44 , fPbufferContext(nullptr) { |
| 45 HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(nullptr); |
| 46 |
| 47 if (!gWC) { |
| 48 WNDCLASS wc; |
| 49 wc.cbClsExtra = 0; |
| 50 wc.cbWndExtra = 0; |
| 51 wc.hbrBackground = nullptr; |
| 52 wc.hCursor = LoadCursor(nullptr, IDC_ARROW); |
| 53 wc.hIcon = LoadIcon(nullptr, IDI_APPLICATION); |
| 54 wc.hInstance = hInstance; |
| 55 wc.lpfnWndProc = (WNDPROC) DefWindowProc; |
| 56 wc.lpszClassName = TEXT("Griffin"); |
| 57 wc.lpszMenuName = nullptr; |
| 58 wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; |
| 59 |
| 60 gWC = RegisterClass(&wc); |
| 61 if (!gWC) { |
| 62 SkDebugf("Could not register window class.\n"); |
| 63 return; |
| 64 } |
| 65 } |
| 66 |
| 67 if (!(fWindow = CreateWindow(TEXT("Griffin"), |
| 68 TEXT("The Invisible Man"), |
| 69 WS_OVERLAPPEDWINDOW, |
| 70 0, 0, 1, 1, |
| 71 nullptr, nullptr, |
| 72 hInstance, nullptr))) { |
| 73 SkDebugf("Could not create window.\n"); |
| 74 return; |
| 75 } |
| 76 |
| 77 if (!(fDeviceContext = GetDC(fWindow))) { |
| 78 SkDebugf("Could not get device context.\n"); |
| 79 this->destroyGLContext(); |
| 80 return; |
| 81 } |
| 82 // Requesting a Core profile would bar us from using NVPR. So we request |
| 83 // compatibility profile or GL ES. |
| 84 SkWGLContextRequest contextType = |
| 85 kGLES_GrGLStandard == forcedGpuAPI ? |
| 86 kGLES_SkWGLContextRequest : kGLPreferCompatibilityProfile_SkWGLContextRe
quest; |
| 87 |
| 88 fPbufferContext = SkWGLPbufferContext::Create(fDeviceContext, 0, contextType
); |
| 89 |
| 90 HDC dc; |
| 91 HGLRC glrc; |
| 92 |
| 93 if (nullptr == fPbufferContext) { |
| 94 if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, contextTy
pe))) { |
| 95 SkDebugf("Could not create rendering context.\n"); |
| 96 this->destroyGLContext(); |
| 97 return; |
| 98 } |
| 99 dc = fDeviceContext; |
| 100 glrc = fGlRenderContext; |
| 101 } else { |
| 102 ReleaseDC(fWindow, fDeviceContext); |
| 103 fDeviceContext = 0; |
| 104 DestroyWindow(fWindow); |
| 105 fWindow = 0; |
| 106 |
| 107 dc = fPbufferContext->getDC(); |
| 108 glrc = fPbufferContext->getGLRC(); |
| 109 } |
| 110 |
| 111 if (!(wglMakeCurrent(dc, glrc))) { |
| 112 SkDebugf("Could not set the context.\n"); |
| 113 this->destroyGLContext(); |
| 114 return; |
| 115 } |
| 116 |
| 117 SkAutoTUnref<const GrGLInterface> gl(GrGLCreateNativeInterface()); |
| 118 if (nullptr == gl.get()) { |
| 119 SkDebugf("Could not create GL interface.\n"); |
| 120 this->destroyGLContext(); |
| 121 return; |
| 122 } |
| 123 if (!gl->validate()) { |
| 124 SkDebugf("Could not validate GL interface.\n"); |
| 125 this->destroyGLContext(); |
| 126 return; |
| 127 } |
| 128 |
| 129 this->init(gl.release()); |
| 130 } |
| 131 |
| 132 WinGLContext::~WinGLContext() { |
| 133 this->teardown(); |
| 134 this->destroyGLContext(); |
| 135 } |
| 136 |
| 137 void WinGLContext::destroyGLContext() { |
| 138 SkSafeSetNull(fPbufferContext); |
| 139 if (fGlRenderContext) { |
| 140 wglDeleteContext(fGlRenderContext); |
| 141 fGlRenderContext = 0; |
| 142 } |
| 143 if (fWindow && fDeviceContext) { |
| 144 ReleaseDC(fWindow, fDeviceContext); |
| 145 fDeviceContext = 0; |
| 146 } |
| 147 if (fWindow) { |
| 148 DestroyWindow(fWindow); |
| 149 fWindow = 0; |
| 150 } |
| 151 } |
| 152 |
| 153 void WinGLContext::onPlatformMakeCurrent() const { |
| 154 HDC dc; |
| 155 HGLRC glrc; |
| 156 |
| 157 if (nullptr == fPbufferContext) { |
| 158 dc = fDeviceContext; |
| 159 glrc = fGlRenderContext; |
| 160 } else { |
| 161 dc = fPbufferContext->getDC(); |
| 162 glrc = fPbufferContext->getGLRC(); |
| 163 } |
| 164 |
| 165 if (!wglMakeCurrent(dc, glrc)) { |
| 166 SkDebugf("Could not create rendering context.\n"); |
| 167 } |
| 168 } |
| 169 |
| 170 void WinGLContext::onPlatformSwapBuffers() const { |
| 171 HDC dc; |
| 172 |
| 173 if (nullptr == fPbufferContext) { |
| 174 dc = fDeviceContext; |
| 175 } else { |
| 176 dc = fPbufferContext->getDC(); |
| 177 } |
| 178 if (!SwapBuffers(dc)) { |
| 179 SkDebugf("Could not complete SwapBuffers.\n"); |
| 180 } |
| 181 } |
| 182 |
| 183 GrGLFuncPtr WinGLContext::onPlatformGetProcAddress(const char* name) const { |
| 184 return reinterpret_cast<GrGLFuncPtr>(wglGetProcAddress(name)); |
| 185 } |
| 186 |
| 187 } // anonymous namespace |
| 188 |
| 189 SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* s
hareContext) { |
| 190 SkASSERT(!shareContext); |
| 191 if (shareContext) { |
| 192 return nullptr; |
| 193 } |
| 194 WinGLContext* ctx = new WinGLContext(forcedGpuAPI); |
| 195 if (!ctx->isValid()) { |
| 196 delete ctx; |
| 197 return nullptr; |
| 198 } |
| 199 return ctx; |
| 200 } |
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