cef/libcef/browser/osr/host_display_client_osr.cc

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// Copyright 2019 The Chromium Embedded Framework 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 "libcef/browser/osr/host_display_client_osr.h"
#include <utility>
#include "libcef/browser/osr/render_widget_host_view_osr.h"
#include "base/memory/shared_memory_mapping.h"
#include "components/viz/common/resources/resource_sizes.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "services/viz/privileged/mojom/compositing/layered_window_updater.mojom.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkRect.h"
#include "third_party/skia/src/core/SkDevice.h"
#include "ui/gfx/skia_util.h"
#if BUILDFLAG(IS_WIN)
#include "skia/ext/skia_utils_win.h"
#endif
class CefLayeredWindowUpdaterOSR : public viz::mojom::LayeredWindowUpdater {
public:
CefLayeredWindowUpdaterOSR(
CefRenderWidgetHostViewOSR* const view,
mojo::PendingReceiver<viz::mojom::LayeredWindowUpdater> receiver);
CefLayeredWindowUpdaterOSR(const CefLayeredWindowUpdaterOSR&) = delete;
CefLayeredWindowUpdaterOSR& operator=(const CefLayeredWindowUpdaterOSR&) =
delete;
~CefLayeredWindowUpdaterOSR() override;
void SetActive(bool active);
const void* GetPixelMemory() const;
gfx::Size GetPixelSize() const;
// viz::mojom::LayeredWindowUpdater implementation.
void OnAllocatedSharedMemory(const gfx::Size& pixel_size,
base::UnsafeSharedMemoryRegion region) override;
void Draw(const gfx::Rect& damage_rect, DrawCallback draw_callback) override;
private:
CefRenderWidgetHostViewOSR* const view_;
mojo::Receiver<viz::mojom::LayeredWindowUpdater> receiver_;
bool active_ = false;
base::WritableSharedMemoryMapping shared_memory_;
gfx::Size pixel_size_;
};
CefLayeredWindowUpdaterOSR::CefLayeredWindowUpdaterOSR(
CefRenderWidgetHostViewOSR* const view,
mojo::PendingReceiver<viz::mojom::LayeredWindowUpdater> receiver)
: view_(view), receiver_(this, std::move(receiver)) {}
CefLayeredWindowUpdaterOSR::~CefLayeredWindowUpdaterOSR() = default;
void CefLayeredWindowUpdaterOSR::SetActive(bool active) {
active_ = active;
}
const void* CefLayeredWindowUpdaterOSR::GetPixelMemory() const {
return shared_memory_.memory();
}
gfx::Size CefLayeredWindowUpdaterOSR::GetPixelSize() const {
return pixel_size_;
}
void CefLayeredWindowUpdaterOSR::OnAllocatedSharedMemory(
const gfx::Size& pixel_size,
base::UnsafeSharedMemoryRegion region) {
// Make sure |pixel_size| is sane.
size_t expected_bytes;
if (!viz::ResourceSizes::MaybeSizeInBytes(
pixel_size, viz::SinglePlaneFormat::kRGBA_8888, &expected_bytes)) {
DLOG(ERROR) << "OnAllocatedSharedMemory with size that overflows";
return;
}
auto mapping = region.Map();
if (!mapping.IsValid()) {
DLOG(ERROR) << "Shared memory mapping failed.";
return;
}
if (mapping.size() < expected_bytes) {
DLOG(ERROR) << "Shared memory size was less than expected.";
return;
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}
pixel_size_ = pixel_size;
shared_memory_ = std::move(mapping);
}
void CefLayeredWindowUpdaterOSR::Draw(const gfx::Rect& damage_rect,
DrawCallback draw_callback) {
if (active_) {
const void* memory = GetPixelMemory();
if (memory) {
view_->OnPaint(damage_rect, pixel_size_, memory);
} else {
LOG(WARNING) << "Failed to read pixels";
}
}
std::move(draw_callback).Run();
}
CefHostDisplayClientOSR::CefHostDisplayClientOSR(
CefRenderWidgetHostViewOSR* const view,
gfx::AcceleratedWidget widget)
: viz::HostDisplayClient(widget), view_(view) {}
CefHostDisplayClientOSR::~CefHostDisplayClientOSR() = default;
void CefHostDisplayClientOSR::SetActive(bool active) {
active_ = active;
if (layered_window_updater_) {
layered_window_updater_->SetActive(active_);
}
}
const void* CefHostDisplayClientOSR::GetPixelMemory() const {
return layered_window_updater_ ? layered_window_updater_->GetPixelMemory()
: nullptr;
}
gfx::Size CefHostDisplayClientOSR::GetPixelSize() const {
return layered_window_updater_ ? layered_window_updater_->GetPixelSize()
: gfx::Size{};
}
void CefHostDisplayClientOSR::UseProxyOutputDevice(
UseProxyOutputDeviceCallback callback) {
std::move(callback).Run(true);
}
void CefHostDisplayClientOSR::CreateLayeredWindowUpdater(
mojo::PendingReceiver<viz::mojom::LayeredWindowUpdater> receiver) {
layered_window_updater_ =
std::make_unique<CefLayeredWindowUpdaterOSR>(view_, std::move(receiver));
layered_window_updater_->SetActive(active_);
}
#if BUILDFLAG(IS_LINUX) && BUILDFLAG(IS_OZONE_X11)
void CefHostDisplayClientOSR::DidCompleteSwapWithNewSize(
const gfx::Size& size) {}
#endif