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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 } | |
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