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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 "content/browser/compositor/reflector_impl.h"
#include "base/bind.h"
#include "base/location.h"
#include "content/browser/compositor/browser_compositor_output_surface.h"
#include "content/browser/compositor/owned_mailbox.h"
#include "ui/compositor/layer.h"
namespace content {
struct ReflectorImpl::LayerData {
LayerData(ui::Layer* layer) : layer(layer) {}
ui::Layer* layer;
bool needs_set_mailbox = false;
};
ReflectorImpl::ReflectorImpl(ui::Compositor* mirrored_compositor,
ui::Layer* mirroring_layer)
: mirrored_compositor_(mirrored_compositor),
flip_texture_(false),
composition_count_(0),
output_surface_(nullptr) {
if (mirroring_layer)
AddMirroringLayer(mirroring_layer);
}
ReflectorImpl::~ReflectorImpl() {
}
void ReflectorImpl::Shutdown() {
if (output_surface_)
DetachFromOutputSurface();
// Prevent the ReflectorImpl from picking up a new output surface.
mirroring_layers_.clear();
}
void ReflectorImpl::DetachFromOutputSurface() {
DCHECK(output_surface_);
output_surface_->SetReflector(nullptr);
DCHECK(mailbox_.get());
mailbox_ = nullptr;
output_surface_ = nullptr;
for (LayerData* layer_data : mirroring_layers_)
layer_data->layer->SetShowSolidColorContent();
}
void ReflectorImpl::OnSourceSurfaceReady(
BrowserCompositorOutputSurface* output_surface) {
if (mirroring_layers_.empty())
return; // Was already Shutdown().
if (output_surface == output_surface_)
return; // Is already attached.
if (output_surface_)
DetachFromOutputSurface();
output_surface_ = output_surface;
composition_started_callback_ =
output_surface_->CreateCompositionStartedCallback();
flip_texture_ = !output_surface->capabilities().flipped_output_surface;
output_surface_->SetReflector(this);
}
void ReflectorImpl::OnMirroringCompositorResized() {
for (LayerData* layer_data : mirroring_layers_)
layer_data->layer->SchedulePaint(layer_data->layer->bounds());
}
void ReflectorImpl::AddMirroringLayer(ui::Layer* layer) {
DCHECK(layer->GetCompositor());
DCHECK(mirroring_layers_.end() == FindLayerData(layer));
LayerData* layer_data = new LayerData(layer);
if (mailbox_)
layer_data->needs_set_mailbox = true;
mirroring_layers_.push_back(layer_data);
mirrored_compositor_->ScheduleFullRedraw();
layer->GetCompositor()->AddObserver(this);
}
void ReflectorImpl::RemoveMirroringLayer(ui::Layer* layer) {
DCHECK(layer->GetCompositor());
ScopedVector<LayerData>::iterator iter = FindLayerData(layer);
DCHECK(iter != mirroring_layers_.end());
(*iter)->layer->SetShowSolidColorContent();
mirroring_layers_.erase(iter);
layer->GetCompositor()->RemoveObserver(this);
composition_count_--;
if (composition_count_ == 0 && !composition_started_callback_.is_null())
composition_started_callback_.Run();
if (mirroring_layers_.empty() && output_surface_)
DetachFromOutputSurface();
}
void ReflectorImpl::OnCompositingStarted(ui::Compositor* compositor,
base::TimeTicks start_time) {
if (composition_count_ > 0 && --composition_count_ == 0 &&
!composition_started_callback_.is_null()) {
composition_started_callback_.Run();
}
}
void ReflectorImpl::OnSourceTextureMailboxUpdated(
scoped_refptr<OwnedMailbox> mailbox) {
mailbox_ = mailbox;
if (mailbox_.get()) {
for (LayerData* layer_data : mirroring_layers_)
layer_data->needs_set_mailbox = true;
// The texture doesn't have the data. Request full redraw on mirrored
// compositor so that the full content will be copied to mirroring
// compositor. This full redraw should land us in OnSourceSwapBuffers() to
// resize the texture appropriately.
mirrored_compositor_->ScheduleFullRedraw();
}
}
void ReflectorImpl::OnSourceSwapBuffers() {
if (mirroring_layers_.empty()) {
if (!composition_started_callback_.is_null())
composition_started_callback_.Run();
return;
}
// Should be attached to the source output surface already.
DCHECK(mailbox_.get());
gfx::Size size = output_surface_->SurfaceSize();
// Request full redraw on mirroring compositor.
for (LayerData* layer_data : mirroring_layers_)
UpdateTexture(layer_data, size, layer_data->layer->bounds());
composition_count_ = mirroring_layers_.size();
}
void ReflectorImpl::OnSourcePostSubBuffer(const gfx::Rect& rect) {
if (mirroring_layers_.empty()) {
if (!composition_started_callback_.is_null())
composition_started_callback_.Run();
return;
}
// Should be attached to the source output surface already.
DCHECK(mailbox_.get());
gfx::Size size = output_surface_->SurfaceSize();
int y = rect.y();
// Flip the coordinates to compositor's one.
if (flip_texture_)
y = size.height() - rect.y() - rect.height();
gfx::Rect mirroring_rect(rect.x(), y, rect.width(), rect.height());
// Request redraw of the dirty portion in mirroring compositor.
for (LayerData* layer_data : mirroring_layers_)
UpdateTexture(layer_data, size, mirroring_rect);
composition_count_ = mirroring_layers_.size();
}
static void ReleaseMailbox(scoped_refptr<OwnedMailbox> mailbox,
const gpu::SyncToken& sync_token,
bool is_lost) {
mailbox->UpdateSyncToken(sync_token);
}
ScopedVector<ReflectorImpl::LayerData>::iterator ReflectorImpl::FindLayerData(
ui::Layer* layer) {
return std::find_if(mirroring_layers_.begin(), mirroring_layers_.end(),
[layer](const LayerData* layer_data) {
return layer_data->layer == layer;
});
}
void ReflectorImpl::UpdateTexture(ReflectorImpl::LayerData* layer_data,
const gfx::Size& source_size,
const gfx::Rect& redraw_rect) {
if (layer_data->needs_set_mailbox) {
layer_data->layer->SetTextureMailbox(
cc::TextureMailbox(mailbox_->holder()),
cc::SingleReleaseCallback::Create(base::Bind(ReleaseMailbox, mailbox_)),
source_size);
layer_data->needs_set_mailbox = false;
} else {
layer_data->layer->SetTextureSize(source_size);
}
layer_data->layer->SetBounds(gfx::Rect(source_size));
layer_data->layer->SetTextureFlipped(flip_texture_);
layer_data->layer->SchedulePaint(redraw_rect);
}
} // namespace content
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