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// Copyright 2012 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 "cc/delegated_renderer_layer_impl.h"
#include "cc/append_quads_data.h"
#include "cc/math_util.h"
#include "cc/quad_sink.h"
#include "cc/render_pass_draw_quad.h"
#include "cc/render_pass_sink.h"
namespace cc {
DelegatedRendererLayerImpl::DelegatedRendererLayerImpl(LayerTreeImpl* treeImpl, int id)
: LayerImpl(treeImpl, id)
{
}
DelegatedRendererLayerImpl::~DelegatedRendererLayerImpl()
{
clearRenderPasses();
}
bool DelegatedRendererLayerImpl::hasDelegatedContent() const
{
return !m_renderPassesInDrawOrder.empty();
}
bool DelegatedRendererLayerImpl::hasContributingDelegatedRenderPasses() const
{
// The root RenderPass for the layer is merged with its target
// RenderPass in each frame. So we only have extra RenderPasses
// to merge when we have a non-root RenderPass present.
return m_renderPassesInDrawOrder.size() > 1;
}
void DelegatedRendererLayerImpl::setRenderPasses(ScopedPtrVector<RenderPass>& renderPassesInDrawOrder)
{
gfx::RectF oldRootDamage;
if (!m_renderPassesInDrawOrder.empty())
oldRootDamage = m_renderPassesInDrawOrder.back()->damage_rect;
clearRenderPasses();
for (size_t i = 0; i < renderPassesInDrawOrder.size(); ++i) {
m_renderPassesIndexById.insert(std::pair<RenderPass::Id, int>(renderPassesInDrawOrder[i]->id, i));
m_renderPassesInDrawOrder.push_back(renderPassesInDrawOrder.take(renderPassesInDrawOrder.begin() + i));
}
renderPassesInDrawOrder.clear();
if (!m_renderPassesInDrawOrder.empty())
m_renderPassesInDrawOrder.back()->damage_rect.Union(oldRootDamage);
}
void DelegatedRendererLayerImpl::clearRenderPasses()
{
// FIXME: Release the resources back to the nested compositor.
m_renderPassesIndexById.clear();
m_renderPassesInDrawOrder.clear();
}
void DelegatedRendererLayerImpl::didLoseOutputSurface()
{
clearRenderPasses();
}
static inline int indexToId(int index) { return index + 1; }
static inline int idToIndex(int id) { return id - 1; }
RenderPass::Id DelegatedRendererLayerImpl::firstContributingRenderPassId() const
{
return RenderPass::Id(id(), indexToId(0));
}
RenderPass::Id DelegatedRendererLayerImpl::nextContributingRenderPassId(RenderPass::Id previous) const
{
return RenderPass::Id(previous.layer_id, previous.index + 1);
}
RenderPass::Id DelegatedRendererLayerImpl::convertDelegatedRenderPassId(RenderPass::Id delegatedRenderPassId) const
{
base::hash_map<RenderPass::Id, int>::const_iterator it = m_renderPassesIndexById.find(delegatedRenderPassId);
DCHECK(it != m_renderPassesIndexById.end());
unsigned delegatedRenderPassIndex = it->second;
return RenderPass::Id(id(), indexToId(delegatedRenderPassIndex));
}
void DelegatedRendererLayerImpl::appendContributingRenderPasses(RenderPassSink& renderPassSink)
{
DCHECK(hasContributingDelegatedRenderPasses());
for (size_t i = 0; i < m_renderPassesInDrawOrder.size() - 1; ++i) {
RenderPass::Id outputRenderPassId = convertDelegatedRenderPassId(m_renderPassesInDrawOrder[i]->id);
// Don't clash with the RenderPass we generate if we own a RenderSurfaceImpl.
DCHECK(outputRenderPassId.index > 0);
renderPassSink.appendRenderPass(m_renderPassesInDrawOrder[i]->Copy(outputRenderPassId));
}
}
void DelegatedRendererLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
{
if (m_renderPassesInDrawOrder.empty())
return;
RenderPass::Id targetRenderPassId = appendQuadsData.renderPassId;
const RenderPass* rootDelegatedRenderPass = m_renderPassesInDrawOrder.back();
DCHECK(rootDelegatedRenderPass->output_rect.origin().IsOrigin());
gfx::Size frameSize = rootDelegatedRenderPass->output_rect.size();
// If the index of the renderPassId is 0, then it is a renderPass generated for a layer
// in this compositor, not the delegated renderer. Then we want to merge our root renderPass with
// the target renderPass. Otherwise, it is some renderPass which we added from the delegated
// renderer.
bool shouldMergeRootRenderPassWithTarget = !targetRenderPassId.index;
if (shouldMergeRootRenderPassWithTarget) {
// Verify that the renderPass we are appending to is created our renderTarget.
DCHECK(targetRenderPassId.layer_id == renderTarget()->id());
appendRenderPassQuads(quadSink, appendQuadsData, rootDelegatedRenderPass, frameSize);
} else {
// Verify that the renderPass we are appending to was created by us.
DCHECK(targetRenderPassId.layer_id == id());
int renderPassIndex = idToIndex(targetRenderPassId.index);
const RenderPass* delegatedRenderPass = m_renderPassesInDrawOrder[renderPassIndex];
appendRenderPassQuads(quadSink, appendQuadsData, delegatedRenderPass, frameSize);
}
}
void DelegatedRendererLayerImpl::appendRenderPassQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData, const RenderPass* delegatedRenderPass, gfx::Size frameSize) const
{
const SharedQuadState* currentSharedQuadState = 0;
SharedQuadState* copiedSharedQuadState = 0;
for (size_t i = 0; i < delegatedRenderPass->quad_list.size(); ++i) {
const DrawQuad* quad = delegatedRenderPass->quad_list[i];
if (quad->shared_quad_state != currentSharedQuadState) {
currentSharedQuadState = quad->shared_quad_state;
copiedSharedQuadState = quadSink.useSharedQuadState(currentSharedQuadState->Copy());
bool isRootDelegatedRenderPass = delegatedRenderPass == m_renderPassesInDrawOrder.back();
if (isRootDelegatedRenderPass) {
// Don't allow areas inside the bounds that are empty.
DCHECK(m_displaySize.IsEmpty() || gfx::Rect(m_displaySize).Contains(gfx::Rect(bounds())));
gfx::Size displaySize = m_displaySize.IsEmpty() ? bounds() : m_displaySize;
gfx::Transform delegatedFrameToLayerSpaceTransform;
delegatedFrameToLayerSpaceTransform.Scale(
static_cast<double>(displaySize.width()) / frameSize.width(),
static_cast<double>(displaySize.height()) / frameSize.height());
copiedSharedQuadState->content_to_target_transform = drawTransform() * delegatedFrameToLayerSpaceTransform * copiedSharedQuadState->content_to_target_transform;
if (renderTarget() == this) {
DCHECK(!isClipped());
DCHECK(renderSurface());
copiedSharedQuadState->clip_rect = MathUtil::mapClippedRect(
drawTransform() * delegatedFrameToLayerSpaceTransform,
copiedSharedQuadState->clip_rect);
} else {
gfx::Rect clip_rect = drawableContentRect();
if (copiedSharedQuadState->is_clipped) {
clip_rect.Intersect(MathUtil::mapClippedRect(
drawTransform() * delegatedFrameToLayerSpaceTransform,
copiedSharedQuadState->clip_rect));
}
copiedSharedQuadState->clip_rect = clip_rect;
copiedSharedQuadState->is_clipped = true;
}
copiedSharedQuadState->opacity *= drawOpacity();
}
}
DCHECK(copiedSharedQuadState);
scoped_ptr<DrawQuad> copyQuad;
if (quad->material != DrawQuad::RENDER_PASS)
copyQuad = quad->Copy(copiedSharedQuadState);
else {
RenderPass::Id contributingDelegatedRenderPassId = RenderPassDrawQuad::MaterialCast(quad)->render_pass_id;
RenderPass::Id contributingRenderPassId = convertDelegatedRenderPassId(contributingDelegatedRenderPassId);
DCHECK(contributingRenderPassId != appendQuadsData.renderPassId);
copyQuad = RenderPassDrawQuad::MaterialCast(quad)->Copy(copiedSharedQuadState, contributingRenderPassId).PassAs<DrawQuad>();
}
DCHECK(copyQuad.get());
quadSink.append(copyQuad.Pass(), appendQuadsData);
}
}
const char* DelegatedRendererLayerImpl::layerTypeAsString() const
{
return "DelegatedRendererLayer";
}
} // namespace cc
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