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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/vr/native_gl_surface_provider.h"
#include "third_party/skia/include/gpu/ganesh/GrDirectContext.h"
#include "third_party/skia/include/gpu/ganesh/gl/GrGLDirectContext.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 {
NativeGlSurfaceProvider::NativeGlSurfaceProvider() {
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());
gfx::ExtensionSet extensions(gfx::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_ = GrDirectContexts::MakeGL(std::move(gr_interface));
DCHECK(gr_context_.get());
}
NativeGlSurfaceProvider::~NativeGlSurfaceProvider() = default;
std::unique_ptr<SkiaSurfaceProvider::Texture>
NativeGlSurfaceProvider::CreateTextureWithSkia(
const gfx::Size& size,
base::FunctionRef<void(SkCanvas*)> paint) {
// We need to store and restore previous FBO after skia draw.
GLint prev_fbo = 0;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &prev_fbo);
auto texture = CreateTextureWithSkiaImpl(gr_context_.get(), size, paint);
gr_context_->resetContext();
glBindFramebufferEXT(GL_FRAMEBUFFER, prev_fbo);
return texture;
}
} // namespace vr
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