| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include <GL/osmesa.h> |
| |
| #include "gl/mesa/SkMesaGLContext.h" |
| #include "gl/GrGLDefines.h" |
| |
| static const GrGLint gBOGUS_SIZE = 16; |
| |
| SkMesaGLContext::SkMesaGLContext() |
| : fContext(static_cast<Context>(0)) |
| , fImage(nullptr) { |
| GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext)); |
| |
| /* Create an RGBA-mode context */ |
| #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 |
| /* specify Z, stencil, accum sizes */ |
| fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, nullptr); |
| #else |
| fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, nullptr); |
| #endif |
| if (!fContext) { |
| SkDebugf("OSMesaCreateContext failed!\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| // Allocate the image buffer |
| fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE * |
| 4 * sizeof(GrGLubyte)); |
| if (!fImage) { |
| SkDebugf("Alloc image buffer failed!\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| |
| // Bind the buffer to the context and make it current |
| if (!OSMesaMakeCurrent((OSMesaContext)fContext, |
| fImage, |
| GR_GL_UNSIGNED_BYTE, |
| gBOGUS_SIZE, |
| gBOGUS_SIZE)) { |
| SkDebugf("OSMesaMakeCurrent failed!\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| |
| SkAutoTUnref<const GrGLInterface> gl(GrGLCreateMesaInterface()); |
| if (nullptr == gl.get()) { |
| SkDebugf("Could not create GL interface!\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| |
| if (!gl->validate()) { |
| SkDebugf("Could not validate GL interface!\n"); |
| this->destroyGLContext(); |
| return; |
| } |
| |
| this->init(gl.detach()); |
| } |
| |
| SkMesaGLContext::~SkMesaGLContext() { |
| this->teardown(); |
| this->destroyGLContext(); |
| } |
| |
| void SkMesaGLContext::destroyGLContext() { |
| if (fImage) { |
| sk_free(fImage); |
| fImage = nullptr; |
| } |
| |
| if (fContext) { |
| OSMesaDestroyContext((OSMesaContext)fContext); |
| fContext = static_cast<Context>(0); |
| } |
| } |
| |
| |
| |
| void SkMesaGLContext::onPlatformMakeCurrent() const { |
| if (fContext) { |
| if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage, |
| GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) { |
| SkDebugf("Could not make MESA context current."); |
| } |
| } |
| } |
| |
| void SkMesaGLContext::onPlatformSwapBuffers() const { } |
| |
| GrGLFuncPtr SkMesaGLContext::onPlatformGetProcAddress(const char* procName) const { |
| return OSMesaGetProcAddress(procName); |
| } |