The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/gpu/gl/mesa/SkMesaGLContext.cpp
gfx/skia/trunk/src/gpu/gl/mesa/SkMesaGLContext.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:80313f9725aa |
|---|---|
| 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/osmesa.h> | |
| 10 | |
| 11 #include "gl/SkMesaGLContext.h" | |
| 12 #include "gl/GrGLDefines.h" | |
| 13 | |
| 14 SkMesaGLContext::AutoContextRestore::AutoContextRestore() { | |
| 15 fOldContext = (Context)OSMesaGetCurrentContext(); | |
| 16 if (NULL != (OSMesaContext)fOldContext) { | |
| 17 OSMesaGetColorBuffer((OSMesaContext)fOldContext, | |
| 18 &fOldWidth, &fOldHeight, | |
| 19 &fOldFormat, &fOldImage); | |
| 20 } | |
| 21 } | |
| 22 | |
| 23 SkMesaGLContext::AutoContextRestore::~AutoContextRestore() { | |
| 24 if (NULL != (OSMesaContext)fOldContext) { | |
| 25 OSMesaMakeCurrent((OSMesaContext)fOldContext, fOldImage, | |
| 26 fOldFormat, fOldWidth, fOldHeight); | |
| 27 } | |
| 28 } | |
| 29 | |
| 30 /////////////////////////////////////////////////////////////////////////////// | |
| 31 | |
| 32 SkMesaGLContext::SkMesaGLContext() | |
| 33 : fContext(static_cast<Context>(NULL)) | |
| 34 , fImage(NULL) { | |
| 35 GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext)); | |
| 36 } | |
| 37 | |
| 38 SkMesaGLContext::~SkMesaGLContext() { | |
| 39 this->destroyGLContext(); | |
| 40 } | |
| 41 | |
| 42 void SkMesaGLContext::destroyGLContext() { | |
| 43 if (fImage) { | |
| 44 sk_free(fImage); | |
| 45 fImage = NULL; | |
| 46 } | |
| 47 | |
| 48 if (fContext) { | |
| 49 OSMesaDestroyContext((OSMesaContext)fContext); | |
| 50 fContext = static_cast<Context>(NULL); | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 static const GrGLint gBOGUS_SIZE = 16; | |
| 55 | |
| 56 const GrGLInterface* SkMesaGLContext::createGLContext() { | |
| 57 /* Create an RGBA-mode context */ | |
| 58 #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 | |
| 59 /* specify Z, stencil, accum sizes */ | |
| 60 fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, NULL); | |
| 61 #else | |
| 62 fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, NULL); | |
| 63 #endif | |
| 64 if (!fContext) { | |
| 65 SkDebugf("OSMesaCreateContext failed!\n"); | |
| 66 this->destroyGLContext(); | |
| 67 return NULL; | |
| 68 } | |
| 69 // Allocate the image buffer | |
| 70 fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE * | |
| 71 4 * sizeof(GrGLubyte)); | |
| 72 if (!fImage) { | |
| 73 SkDebugf("Alloc image buffer failed!\n"); | |
| 74 this->destroyGLContext(); | |
| 75 return NULL; | |
| 76 } | |
| 77 | |
| 78 // Bind the buffer to the context and make it current | |
| 79 if (!OSMesaMakeCurrent((OSMesaContext)fContext, | |
| 80 fImage, | |
| 81 GR_GL_UNSIGNED_BYTE, | |
| 82 gBOGUS_SIZE, | |
| 83 gBOGUS_SIZE)) { | |
| 84 SkDebugf("OSMesaMakeCurrent failed!\n"); | |
| 85 this->destroyGLContext(); | |
| 86 return NULL; | |
| 87 } | |
| 88 | |
| 89 const GrGLInterface* interface = GrGLCreateMesaInterface(); | |
| 90 if (!interface) { | |
| 91 SkDebugf("Could not create GL interface!\n"); | |
| 92 this->destroyGLContext(); | |
| 93 return NULL; | |
| 94 } | |
| 95 return interface; | |
| 96 | |
| 97 } | |
| 98 | |
| 99 void SkMesaGLContext::makeCurrent() const { | |
| 100 if (fContext) { | |
| 101 if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage, | |
| 102 GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) { | |
| 103 SkDebugf("Could not make MESA context current."); | |
| 104 } | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 void SkMesaGLContext::swapBuffers() const { } |
