| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/vr/ganesh_surface_provider.h" |
| |
| #include "skia/ext/texture_handle.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/core/SkSurface.h" |
| #include "third_party/skia/include/gpu/GrContext.h" |
| #include "ui/gfx/geometry/size.h" |
| #include "ui/gl/gl_implementation.h" |
| #include "ui/gl/gl_version_info.h" |
| #include "ui/gl/init/create_gr_gl_interface.h" |
| |
| namespace vr { |
| |
| GaneshSurfaceProvider::GaneshSurfaceProvider() { |
| const char* version_str = |
| reinterpret_cast<const char*>(glGetString(GL_VERSION)); |
| const char* renderer_str = |
| reinterpret_cast<const char*>(glGetString(GL_RENDERER)); |
| std::string extensions_string(gl::GetGLExtensionsFromCurrentContext()); |
| gl::ExtensionSet extensions(gl::MakeExtensionSet(extensions_string)); |
| gl::GLVersionInfo gl_version_info(version_str, renderer_str, extensions); |
| sk_sp<const GrGLInterface> gr_interface = |
| gl::init::CreateGrGLInterface(gl_version_info); |
| DCHECK(gr_interface.get()); |
| gr_context_ = GrContext::MakeGL(std::move(gr_interface)); |
| DCHECK(gr_context_.get()); |
| glGetIntegerv(GL_FRAMEBUFFER_BINDING, &main_fbo_); |
| } |
| |
| GaneshSurfaceProvider::~GaneshSurfaceProvider() = default; |
| |
| sk_sp<SkSurface> GaneshSurfaceProvider::MakeSurface(const gfx::Size& size) { |
| return SkSurface::MakeRenderTarget( |
| gr_context_.get(), SkBudgeted::kNo, |
| SkImageInfo::MakeN32Premul(size.width(), size.height()), 0, |
| kTopLeft_GrSurfaceOrigin, nullptr); |
| } |
| |
| GLuint GaneshSurfaceProvider::FlushSurface(SkSurface* surface, |
| GLuint reuse_texture_id) { |
| surface->getCanvas()->flush(); |
| GrBackendObject backend_object = |
| surface->getTextureHandle(SkSurface::kFlushRead_BackendHandleAccess); |
| DCHECK_NE(backend_object, 0); |
| GLuint texture_id = |
| skia::GrBackendObjectToGrGLTextureInfo(backend_object)->fID; |
| DCHECK_NE(texture_id, 0u); |
| surface->getCanvas()->getGrContext()->resetContext(); |
| glBindFramebufferEXT(GL_FRAMEBUFFER, main_fbo_); |
| |
| return texture_id; |
| } |
| |
| } // namespace vr |