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| 1 | |
| 2 /* | |
| 3 * Copyright 2015 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 "GLWindowContext_win.h" | |
| 10 | |
| 11 #include <GL/gl.h> | |
| 12 | |
| 13 // windows stuff | |
| 14 #include "win/SkWGL.h" | |
| 15 #include "Window_win.h" | |
| 16 | |
| 17 namespace sk_app { | |
| 18 | |
| 19 // platform-dependent create | |
| 20 GLWindowContext* GLWindowContext::Create(void* platformData, const DisplayParams
& params) { | |
| 21 GLWindowContext_win* ctx = new GLWindowContext_win(platformData, params); | |
| 22 if (!ctx->isValid()) { | |
| 23 delete ctx; | |
| 24 return nullptr; | |
| 25 } | |
| 26 return ctx; | |
| 27 } | |
| 28 | |
| 29 GLWindowContext_win::GLWindowContext_win(void* platformData, const DisplayParams
& params) | |
| 30 : GLWindowContext(platformData, params) | |
| 31 , fHWND(0) | |
| 32 , fHGLRC(NULL) { | |
| 33 | |
| 34 // any config code here (particularly for msaa)? | |
| 35 | |
| 36 this->initializeContext(platformData, params); | |
| 37 } | |
| 38 | |
| 39 GLWindowContext_win::~GLWindowContext_win() { | |
| 40 this->destroyContext(); | |
| 41 } | |
| 42 | |
| 43 void GLWindowContext_win::onInitializeContext(void* platformData, const DisplayP
arams& params) { | |
| 44 | |
| 45 ContextPlatformData_win* winPlatformData = | |
| 46 reinterpret_cast<ContextPlatformData_win*>(platformData); | |
| 47 | |
| 48 if (winPlatformData) { | |
| 49 fHWND = winPlatformData->fHWnd; | |
| 50 } | |
| 51 HDC dc = GetDC(fHWND); | |
| 52 | |
| 53 fHGLRC = SkCreateWGLContext(dc, params.fMSAASampleCount, params.fDeepColor, | |
| 54 kGLPreferCompatibilityProfile_SkWGLContextReques
t); | |
| 55 if (NULL == fHGLRC) { | |
| 56 return; | |
| 57 } | |
| 58 | |
| 59 if (wglMakeCurrent(dc, fHGLRC)) { | |
| 60 glClearStencil(0); | |
| 61 glClearColor(0, 0, 0, 0); | |
| 62 glStencilMask(0xffffffff); | |
| 63 glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT); | |
| 64 | |
| 65 // use DescribePixelFormat to get the stencil and color bit depth. | |
| 66 int pixelFormat = GetPixelFormat(dc); | |
| 67 PIXELFORMATDESCRIPTOR pfd; | |
| 68 DescribePixelFormat(dc, pixelFormat, sizeof(pfd), &pfd); | |
| 69 fStencilBits = pfd.cStencilBits; | |
| 70 // pfd.cColorBits includes alpha, so it will be 32 in 8/8/8/8 and 10/10/
10/2 | |
| 71 fColorBits = pfd.cRedBits + pfd.cGreenBits + pfd.cBlueBits; | |
| 72 | |
| 73 // Get sample count if the MSAA WGL extension is present | |
| 74 SkWGLExtensions extensions; | |
| 75 if (extensions.hasExtension(dc, "WGL_ARB_multisample")) { | |
| 76 static const int kSampleCountAttr = SK_WGL_SAMPLES; | |
| 77 extensions.getPixelFormatAttribiv(dc, | |
| 78 pixelFormat, | |
| 79 0, | |
| 80 1, | |
| 81 &kSampleCountAttr, | |
| 82 &fSampleCount); | |
| 83 } else { | |
| 84 fSampleCount = 0; | |
| 85 } | |
| 86 | |
| 87 RECT rect; | |
| 88 GetClientRect(fHWND, &rect); | |
| 89 fWidth = rect.right - rect.left; | |
| 90 fHeight = rect.bottom - rect.top; | |
| 91 glViewport(0, 0, fWidth, fHeight); | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 | |
| 96 void GLWindowContext_win::onDestroyContext() { | |
| 97 wglMakeCurrent(wglGetCurrentDC(), NULL); | |
| 98 wglDeleteContext(fHGLRC); | |
| 99 fHGLRC = NULL; | |
| 100 } | |
| 101 | |
| 102 | |
| 103 void GLWindowContext_win::onSwapBuffers() { | |
| 104 HDC dc = GetDC((HWND)fHWND); | |
| 105 SwapBuffers(dc); | |
| 106 ReleaseDC((HWND)fHWND, dc); | |
| 107 } | |
| 108 | |
| 109 | |
| 110 } //namespace sk_app | |
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Chromium Code Reviews
Issue 1990893002:
Revert of Add OpenGL context to Viewer. (Closed)
Base URL: https://skia.googlesource.com/skia.git@master