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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/osmesa.h> |
| 9 |
| 10 #include "gl/mesa/SkMesaGLContext.h" |
| 11 #include "gl/GrGLDefines.h" |
| 12 |
| 13 static const GrGLint gBOGUS_SIZE = 16; |
| 14 |
| 15 SkMesaGLContext::SkMesaGLContext() |
| 16 : fContext(static_cast<Context>(0)) |
| 17 , fImage(nullptr) { |
| 18 GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext)); |
| 19 |
| 20 /* Create an RGBA-mode context */ |
| 21 #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 |
| 22 /* specify Z, stencil, accum sizes */ |
| 23 fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, nullptr); |
| 24 #else |
| 25 fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, nullptr); |
| 26 #endif |
| 27 if (!fContext) { |
| 28 SkDebugf("OSMesaCreateContext failed!\n"); |
| 29 this->destroyGLContext(); |
| 30 return; |
| 31 } |
| 32 // Allocate the image buffer |
| 33 fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE * |
| 34 4 * sizeof(GrGLubyte)); |
| 35 if (!fImage) { |
| 36 SkDebugf("Alloc image buffer failed!\n"); |
| 37 this->destroyGLContext(); |
| 38 return; |
| 39 } |
| 40 |
| 41 // Bind the buffer to the context and make it current |
| 42 if (!OSMesaMakeCurrent((OSMesaContext)fContext, |
| 43 fImage, |
| 44 GR_GL_UNSIGNED_BYTE, |
| 45 gBOGUS_SIZE, |
| 46 gBOGUS_SIZE)) { |
| 47 SkDebugf("OSMesaMakeCurrent failed!\n"); |
| 48 this->destroyGLContext(); |
| 49 return; |
| 50 } |
| 51 |
| 52 SkAutoTUnref<const GrGLInterface> gl(GrGLCreateMesaInterface()); |
| 53 if (nullptr == gl.get()) { |
| 54 SkDebugf("Could not create GL interface!\n"); |
| 55 this->destroyGLContext(); |
| 56 return; |
| 57 } |
| 58 |
| 59 if (!gl->validate()) { |
| 60 SkDebugf("Could not validate GL interface!\n"); |
| 61 this->destroyGLContext(); |
| 62 return; |
| 63 } |
| 64 |
| 65 this->init(gl.release()); |
| 66 } |
| 67 |
| 68 SkMesaGLContext::~SkMesaGLContext() { |
| 69 this->teardown(); |
| 70 this->destroyGLContext(); |
| 71 } |
| 72 |
| 73 void SkMesaGLContext::destroyGLContext() { |
| 74 if (fImage) { |
| 75 sk_free(fImage); |
| 76 fImage = nullptr; |
| 77 } |
| 78 |
| 79 if (fContext) { |
| 80 OSMesaDestroyContext((OSMesaContext)fContext); |
| 81 fContext = static_cast<Context>(0); |
| 82 } |
| 83 } |
| 84 |
| 85 |
| 86 |
| 87 void SkMesaGLContext::onPlatformMakeCurrent() const { |
| 88 if (fContext) { |
| 89 if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage, |
| 90 GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) { |
| 91 SkDebugf("Could not make MESA context current."); |
| 92 } |
| 93 } |
| 94 } |
| 95 |
| 96 void SkMesaGLContext::onPlatformSwapBuffers() const { } |
| 97 |
| 98 GrGLFuncPtr SkMesaGLContext::onPlatformGetProcAddress(const char* procName) cons
t { |
| 99 return OSMesaGetProcAddress(procName); |
| 100 } |
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