| |
| /* |
| * 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/GLContext_mesa.h" |
| #include "gl/GrGLDefines.h" |
| |
| #include "gl/GrGLAssembleInterface.h" |
| #include "gl/GrGLUtil.h" |
| #include "osmesa_wrapper.h" |
| |
| namespace { |
| |
| static GrGLFuncPtr osmesa_get(void* ctx, const char name[]) { |
| SkASSERT(nullptr == ctx); |
| SkASSERT(OSMesaGetCurrentContext()); |
| return OSMesaGetProcAddress(name); |
| } |
| |
| static const GrGLInterface* create_mesa_interface() { |
| if (nullptr == OSMesaGetCurrentContext()) { |
| return nullptr; |
| } |
| return GrGLAssembleInterface(nullptr, osmesa_get); |
| } |
| |
| static const GrGLint gBOGUS_SIZE = 16; |
| |
| class MesaGLContext : public sk_gpu_test::GLContext { |
| private: |
| typedef intptr_t Context; |
| |
| public: |
| MesaGLContext(); |
| ~MesaGLContext() override; |
| |
| private: |
| void destroyGLContext(); |
| |
| void onPlatformMakeCurrent() const override; |
| |
| void onPlatformSwapBuffers() const override; |
| |
| GrGLFuncPtr onPlatformGetProcAddress(const char *) const override; |
| |
| Context fContext; |
| GrGLubyte *fImage; |
| }; |
| |
| MesaGLContext::MesaGLContext() : 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(create_mesa_interface()); |
| 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.release()); |
| } |
| |
| MesaGLContext::~MesaGLContext() { |
| this->teardown(); |
| this->destroyGLContext(); |
| } |
| |
| void MesaGLContext::destroyGLContext() { |
| if (fImage) { |
| sk_free(fImage); |
| fImage = nullptr; |
| } |
| |
| if (fContext) { |
| OSMesaDestroyContext((OSMesaContext) fContext); |
| fContext = static_cast<Context>(0); |
| } |
| } |
| |
| |
| void MesaGLContext::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 MesaGLContext::onPlatformSwapBuffers() const { } |
| |
| GrGLFuncPtr MesaGLContext::onPlatformGetProcAddress(const char *procName) const { |
| return OSMesaGetProcAddress(procName); |
| } |
| } // anonymous namespace |
| |
| |
| namespace sk_gpu_test { |
| GLContext *CreateMesaGLContext() { |
| MesaGLContext *ctx = new MesaGLContext; |
| if (!ctx->isValid()) { |
| delete ctx; |
| return nullptr; |
| } |
| return ctx; |
| } |
| } // sk_gpu_test |