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// Copyright 2014 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 "ui/ozone/demo/software_renderer.h"
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/trace_event/trace_event.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "ui/gfx/vsync_provider.h"
#include "ui/ozone/public/ozone_platform.h"
#include "ui/ozone/public/platform_window_surface.h"
#include "ui/ozone/public/surface_factory_ozone.h"
#include "ui/ozone/public/surface_ozone_canvas.h"
namespace ui {
namespace {
const int kFrameDelayMilliseconds = 16;
} // namespace
SoftwareRenderer::SoftwareRenderer(
gfx::AcceleratedWidget widget,
std::unique_ptr<PlatformWindowSurface> window_surface,
const gfx::Size& size)
: RendererBase(widget, size),
window_surface_(std::move(window_surface)),
vsync_period_(
base::TimeDelta::FromMilliseconds(kFrameDelayMilliseconds)) {}
SoftwareRenderer::~SoftwareRenderer() {}
bool SoftwareRenderer::Initialize() {
software_surface_ =
ui::OzonePlatform::GetInstance()
->GetSurfaceFactoryOzone()
->CreateCanvasForWidget(widget_,
base::ThreadTaskRunnerHandle::Get().get());
if (!software_surface_) {
LOG(ERROR) << "Failed to create software surface";
return false;
}
software_surface_->ResizeCanvas(size_);
vsync_provider_ = software_surface_->CreateVSyncProvider();
RenderFrame();
return true;
}
void SoftwareRenderer::RenderFrame() {
TRACE_EVENT0("ozone", "SoftwareRenderer::RenderFrame");
float fraction = NextFraction();
SkCanvas* canvas = software_surface_->GetCanvas();
SkColor color =
SkColorSetARGB(0xff, 0, 0xff * fraction, 0xff * (1 - fraction));
canvas->clear(color);
software_surface_->PresentCanvas(gfx::Rect(size_));
if (vsync_provider_) {
vsync_provider_->GetVSyncParameters(
base::BindOnce(&SoftwareRenderer::UpdateVSyncParameters,
weak_ptr_factory_.GetWeakPtr()));
}
timer_.Start(FROM_HERE, vsync_period_, this, &SoftwareRenderer::RenderFrame);
}
void SoftwareRenderer::UpdateVSyncParameters(const base::TimeTicks timebase,
const base::TimeDelta interval) {
vsync_period_ = interval;
}
} // namespace ui
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