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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/service/display_embedder/software_output_device_win.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/memory/unsafe_shared_memory_region.h"
#include "base/trace_event/trace_event.h"
#include "base/win/windows_version.h"
#include "components/viz/common/display/use_layered_window.h"
#include "components/viz/common/features.h"
#include "components/viz/common/resources/resource_sizes.h"
#include "components/viz/service/display_embedder/software_output_device_win_swapchain.h"
#include "mojo/public/cpp/bindings/pending_remote.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 "skia/ext/skia_utils_win.h"
#include "ui/gfx/gdi_util.h"
#include "ui/gfx/geometry/skia_conversions.h"
#include "ui/gfx/win/hwnd_util.h"
#include "ui/gl/vsync_provider_win.h"
namespace viz {
SoftwareOutputDeviceWinDirect::SoftwareOutputDeviceWinDirect(
HWND hwnd,
OutputDeviceBacking* backing)
: SoftwareOutputDeviceWinBase(hwnd), backing_(backing) {
backing_->RegisterClient(this);
}
SoftwareOutputDeviceWinDirect::~SoftwareOutputDeviceWinDirect() {
backing_->UnregisterClient(this);
}
void SoftwareOutputDeviceWinDirect::NotifyClientResized() {
backing_->ClientResized();
}
bool SoftwareOutputDeviceWinDirect::ResizeDelegated(
const gfx::Size& viewport_pixel_size) {
canvas_.reset();
return true;
}
SkCanvas* SoftwareOutputDeviceWinDirect::BeginPaintDelegated() {
if (!canvas_) {
// Share pixel backing with other SoftwareOutputDeviceWinDirect instances.
// All work happens on the same thread so this is safe.
base::UnsafeSharedMemoryRegion* region =
backing_->GetSharedMemoryRegion(viewport_pixel_size_);
if (region && region->IsValid()) {
canvas_ = skia::CreatePlatformCanvasWithSharedSection(
viewport_pixel_size_.width(), viewport_pixel_size_.height(), true,
region->GetPlatformHandle(), skia::CRASH_ON_FAILURE);
}
}
return canvas_.get();
}
void SoftwareOutputDeviceWinDirect::EndPaintDelegated(
const gfx::Rect& damage_rect) {
if (!canvas_)
return;
HDC hdc = ::GetDC(hwnd());
if (!hdc)
return;
HDC dib_dc = skia::GetNativeDrawingContext(canvas_.get());
RECT src_rect = damage_rect.ToRECT();
skia::CopyHDC(dib_dc, hdc, damage_rect.x(), damage_rect.y(),
canvas_->imageInfo().isOpaque(), src_rect,
canvas_->getTotalMatrix());
::ReleaseDC(hwnd(), hdc);
}
const gfx::Size& SoftwareOutputDeviceWinDirect::GetViewportPixelSize() const {
return viewport_pixel_size_;
}
void SoftwareOutputDeviceWinDirect::ReleaseCanvas() {
canvas_.reset();
}
SoftwareOutputDeviceWinProxy::SoftwareOutputDeviceWinProxy(
HWND hwnd,
mojo::PendingRemote<mojom::LayeredWindowUpdater> layered_window_updater)
: SoftwareOutputDeviceWinBase(hwnd),
layered_window_updater_(std::move(layered_window_updater)) {
DCHECK(layered_window_updater_.is_bound());
}
SoftwareOutputDeviceWinProxy::~SoftwareOutputDeviceWinProxy() = default;
void SoftwareOutputDeviceWinProxy::OnSwapBuffers(
SwapBuffersCallback swap_ack_callback,
gfx::FrameData data) {
DCHECK(swap_ack_callback_.is_null());
// We aren't waiting on DrawAck() and can immediately run the callback.
if (!waiting_on_draw_ack_) {
task_runner_->PostTask(
FROM_HERE,
base::BindOnce(std::move(swap_ack_callback), viewport_pixel_size_));
return;
}
swap_ack_callback_ =
base::BindOnce(std::move(swap_ack_callback), viewport_pixel_size_);
}
bool SoftwareOutputDeviceWinProxy::ResizeDelegated(
const gfx::Size& viewport_pixel_size) {
canvas_.reset();
size_t required_bytes;
if (!ResourceSizes::MaybeSizeInBytes(viewport_pixel_size,
SinglePlaneFormat::kRGBA_8888,
&required_bytes)) {
DLOG(ERROR) << "Invalid viewport size " << viewport_pixel_size.ToString();
return false;
}
base::UnsafeSharedMemoryRegion region =
base::UnsafeSharedMemoryRegion::Create(required_bytes);
if (!region.IsValid()) {
DLOG(ERROR) << "Failed to allocate " << required_bytes << " bytes";
return false;
}
// The SkCanvas maps shared memory on creation and unmaps on destruction.
canvas_ = skia::CreatePlatformCanvasWithSharedSection(
viewport_pixel_size.width(), viewport_pixel_size.height(), true,
region.GetPlatformHandle(), skia::CRASH_ON_FAILURE);
// Transfer region ownership to the browser process.
layered_window_updater_->OnAllocatedSharedMemory(viewport_pixel_size,
std::move(region));
return true;
}
SkCanvas* SoftwareOutputDeviceWinProxy::BeginPaintDelegated() {
return canvas_.get();
}
void SoftwareOutputDeviceWinProxy::EndPaintDelegated(
const gfx::Rect& damage_rect) {
DCHECK(!waiting_on_draw_ack_);
if (!canvas_)
return;
layered_window_updater_->Draw(base::BindOnce(
&SoftwareOutputDeviceWinProxy::DrawAck, base::Unretained(this)));
waiting_on_draw_ack_ = true;
TRACE_EVENT_ASYNC_BEGIN0("viz", "SoftwareOutputDeviceWinProxy::Draw", this);
}
void SoftwareOutputDeviceWinProxy::DrawAck() {
DCHECK(waiting_on_draw_ack_);
TRACE_EVENT_ASYNC_END0("viz", "SoftwareOutputDeviceWinProxy::Draw", this);
waiting_on_draw_ack_ = false;
// It's possible the display compositor won't call SwapBuffers() so there will
// be no callback to run.
if (swap_ack_callback_)
std::move(swap_ack_callback_).Run();
}
std::unique_ptr<SoftwareOutputDevice> CreateSoftwareOutputDeviceWin(
HWND hwnd,
OutputDeviceBacking* backing,
mojom::DisplayClient* display_client,
HWND& child_hwnd) {
child_hwnd = NULL;
if (features::ShouldRemoveRedirectionBitmap()) {
return std::make_unique<SoftwareOutputDeviceWinSwapChain>(hwnd, child_hwnd,
backing);
}
if (NeedsToUseLayerWindow(hwnd)) {
DCHECK(display_client);
// Setup mojom::LayeredWindowUpdater implementation in the browser process
// to draw to the HWND.
mojo::PendingRemote<mojom::LayeredWindowUpdater> layered_window_updater;
display_client->CreateLayeredWindowUpdater(
layered_window_updater.InitWithNewPipeAndPassReceiver());
return std::make_unique<SoftwareOutputDeviceWinProxy>(
hwnd, std::move(layered_window_updater));
}
return std::make_unique<SoftwareOutputDeviceWinDirect>(hwnd, backing);
}
} // namespace viz
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