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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 "content/common/gpu/client/gl_helper.h"
#include "ui/compositor/layer.h"
namespace content {
ReflectorImpl::ReflectorImpl(ui::Compositor* mirrored_compositor,
ui::Layer* mirroring_layer)
: mirrored_compositor_(mirrored_compositor),
mirroring_layer_(mirroring_layer),
mirrored_compositor_gl_helper_texture_id_(0),
needs_set_mailbox_(false),
flip_texture_(false),
output_surface_(nullptr) {
}
ReflectorImpl::~ReflectorImpl() {
}
void ReflectorImpl::Shutdown() {
if (output_surface_)
DetachFromOutputSurface();
// Prevent the ReflectorImpl from picking up a new output surface.
mirroring_layer_ = nullptr;
}
void ReflectorImpl::DetachFromOutputSurface() {
DCHECK(output_surface_);
output_surface_->SetReflector(nullptr);
DCHECK(mailbox_.get());
mailbox_ = nullptr;
output_surface_ = nullptr;
mirrored_compositor_gl_helper_->DeleteTexture(
mirrored_compositor_gl_helper_texture_id_);
mirrored_compositor_gl_helper_texture_id_ = 0;
mirrored_compositor_gl_helper_ = nullptr;
mirroring_layer_->SetShowSolidColorContent();
}
void ReflectorImpl::OnSourceSurfaceReady(
BrowserCompositorOutputSurface* output_surface) {
if (!mirroring_layer_)
return; // Was already Shutdown().
if (output_surface == output_surface_)
return; // Is already attached.
if (output_surface_)
DetachFromOutputSurface();
// Use the GLHelper from the ImageTransportFactory for our OwnedMailbox so we
// don't have to manage the lifetime of the GLHelper relative to the lifetime
// of the mailbox.
GLHelper* shared_helper = ImageTransportFactory::GetInstance()->GetGLHelper();
mailbox_ = new OwnedMailbox(shared_helper);
needs_set_mailbox_ = true;
// Create a GLHelper attached to the mirrored compositor's output surface for
// copying the output of the mirrored compositor.
mirrored_compositor_gl_helper_.reset(
new GLHelper(output_surface->context_provider()->ContextGL(),
output_surface->context_provider()->ContextSupport()));
// Create a texture id in the name space of the new GLHelper to update the
// mailbox being held by the |mirroring_layer_|.
mirrored_compositor_gl_helper_texture_id_ =
mirrored_compositor_gl_helper_->ConsumeMailboxToTexture(
mailbox_->mailbox(), mailbox_->sync_point());
flip_texture_ = !output_surface->capabilities().flipped_output_surface;
// 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();
output_surface_ = output_surface;
output_surface_->SetReflector(this);
}
void ReflectorImpl::OnMirroringCompositorResized() {
mirroring_layer_->SchedulePaint(mirroring_layer_->bounds());
}
void ReflectorImpl::OnSourceSwapBuffers() {
if (!mirroring_layer_)
return;
// Should be attached to the source output surface already.
DCHECK(mailbox_.get());
gfx::Size size = output_surface_->SurfaceSize();
mirrored_compositor_gl_helper_->CopyTextureFullImage(
mirrored_compositor_gl_helper_texture_id_, size);
// Insert a barrier to make the copy show up in the mirroring compositor's
// mailbox. Since the the compositor contexts and the ImageTransportFactory's
// GLHelper are all on the same GPU channel, this is sufficient instead of
// plumbing through a sync point.
mirrored_compositor_gl_helper_->InsertOrderingBarrier();
// Request full redraw on mirroring compositor.
UpdateTexture(size, mirroring_layer_->bounds());
}
void ReflectorImpl::OnSourcePostSubBuffer(const gfx::Rect& rect) {
if (!mirroring_layer_)
return;
// Should be attached to the source output surface already.
DCHECK(mailbox_.get());
gfx::Size size = output_surface_->SurfaceSize();
mirrored_compositor_gl_helper_->CopyTextureSubImage(
mirrored_compositor_gl_helper_texture_id_, rect);
// Insert a barrier to make the copy show up in the mirroring compositor's
// mailbox. Since the the compositor contexts and the ImageTransportFactory's
// GLHelper are all on the same GPU channel, this is sufficient instead of
// plumbing through a sync point.
mirrored_compositor_gl_helper_->InsertOrderingBarrier();
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.
UpdateTexture(size, mirroring_rect);
}
static void ReleaseMailbox(scoped_refptr<OwnedMailbox> mailbox,
unsigned int sync_point,
bool is_lost) {
mailbox->UpdateSyncPoint(sync_point);
}
void ReflectorImpl::UpdateTexture(const gfx::Size& source_size,
const gfx::Rect& redraw_rect) {
if (needs_set_mailbox_) {
mirroring_layer_->SetTextureMailbox(
cc::TextureMailbox(mailbox_->holder()),
cc::SingleReleaseCallback::Create(base::Bind(ReleaseMailbox, mailbox_)),
source_size);
needs_set_mailbox_ = false;
} else {
mirroring_layer_->SetTextureSize(source_size);
}
mirroring_layer_->SetBounds(gfx::Rect(source_size));
mirroring_layer_->SetTextureFlipped(flip_texture_);
mirroring_layer_->SchedulePaint(redraw_rect);
}
} // namespace content
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