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// Copyright 2011 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/layers/render_surface_impl.h"
#include <algorithm>
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "cc/base/math_util.h"
#include "cc/debug/debug_colors.h"
#include "cc/layers/delegated_renderer_layer_impl.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/render_pass_sink.h"
#include "cc/quads/debug_border_draw_quad.h"
#include "cc/quads/render_pass.h"
#include "cc/quads/render_pass_draw_quad.h"
#include "cc/quads/shared_quad_state.h"
#include "cc/trees/damage_tracker.h"
#include "cc/trees/occlusion_tracker.h"
#include "third_party/skia/include/core/SkImageFilter.h"
#include "ui/gfx/rect_conversions.h"
#include "ui/gfx/transform.h"
namespace cc {
RenderSurfaceImpl::RenderSurfaceImpl(LayerImpl* owning_layer)
: owning_layer_(owning_layer),
surface_property_changed_(false),
draw_opacity_is_animating_(false),
target_surface_transforms_are_animating_(false),
screen_space_transforms_are_animating_(false),
is_clipped_(false),
contributes_to_drawn_surface_(false),
draw_opacity_(1),
nearest_occlusion_immune_ancestor_(NULL),
target_render_surface_layer_index_history_(0),
current_layer_index_history_(0) {
damage_tracker_ = DamageTracker::Create();
}
RenderSurfaceImpl::~RenderSurfaceImpl() {}
gfx::RectF RenderSurfaceImpl::DrawableContentRect() const {
gfx::RectF drawable_content_rect =
MathUtil::MapClippedRect(draw_transform_, content_rect_);
if (owning_layer_->has_replica()) {
drawable_content_rect.Union(
MathUtil::MapClippedRect(replica_draw_transform_, content_rect_));
}
return drawable_content_rect;
}
int RenderSurfaceImpl::OwningLayerId() const {
return owning_layer_ ? owning_layer_->id() : 0;
}
void RenderSurfaceImpl::SetClipRect(const gfx::Rect& clip_rect) {
if (clip_rect_ == clip_rect)
return;
surface_property_changed_ = true;
clip_rect_ = clip_rect;
}
bool RenderSurfaceImpl::ContentsChanged() const {
return !damage_tracker_->current_damage_rect().IsEmpty();
}
void RenderSurfaceImpl::SetContentRect(const gfx::Rect& content_rect) {
if (content_rect_ == content_rect)
return;
surface_property_changed_ = true;
content_rect_ = content_rect;
}
bool RenderSurfaceImpl::SurfacePropertyChanged() const {
// Surface property changes are tracked as follows:
//
// - surface_property_changed_ is flagged when the clip_rect or content_rect
// change. As of now, these are the only two properties that can be affected
// by descendant layers.
//
// - all other property changes come from the owning layer (or some ancestor
// layer that propagates its change to the owning layer).
//
DCHECK(owning_layer_);
return surface_property_changed_ || owning_layer_->LayerPropertyChanged();
}
bool RenderSurfaceImpl::SurfacePropertyChangedOnlyFromDescendant() const {
return surface_property_changed_ && !owning_layer_->LayerPropertyChanged();
}
void RenderSurfaceImpl::AddContributingDelegatedRenderPassLayer(
LayerImpl* layer) {
DCHECK(std::find(layer_list_.begin(), layer_list_.end(), layer) !=
layer_list_.end());
DelegatedRendererLayerImpl* delegated_renderer_layer =
static_cast<DelegatedRendererLayerImpl*>(layer);
contributing_delegated_render_pass_layer_list_.push_back(
delegated_renderer_layer);
}
void RenderSurfaceImpl::ClearLayerLists() {
layer_list_.clear();
contributing_delegated_render_pass_layer_list_.clear();
}
RenderPass::Id RenderSurfaceImpl::RenderPassId() {
int layer_id = owning_layer_->id();
int sub_id = 0;
DCHECK_GT(layer_id, 0);
return RenderPass::Id(layer_id, sub_id);
}
void RenderSurfaceImpl::AppendRenderPasses(RenderPassSink* pass_sink) {
for (size_t i = 0;
i < contributing_delegated_render_pass_layer_list_.size();
++i) {
DelegatedRendererLayerImpl* delegated_renderer_layer =
contributing_delegated_render_pass_layer_list_[i];
delegated_renderer_layer->AppendContributingRenderPasses(pass_sink);
}
scoped_ptr<RenderPass> pass = RenderPass::Create(layer_list_.size());
pass->SetNew(RenderPassId(),
content_rect_,
gfx::IntersectRects(content_rect_,
damage_tracker_->current_damage_rect()),
screen_space_transform_);
pass_sink->AppendRenderPass(pass.Pass());
}
void RenderSurfaceImpl::AppendQuads(
RenderPass* render_pass,
const OcclusionTracker<LayerImpl>& occlusion_tracker,
AppendQuadsData* append_quads_data,
bool for_replica,
RenderPass::Id render_pass_id) {
DCHECK(!for_replica || owning_layer_->has_replica());
const gfx::Transform& draw_transform =
for_replica ? replica_draw_transform_ : draw_transform_;
gfx::Rect visible_content_rect =
occlusion_tracker.UnoccludedContributingSurfaceContentRect(
content_rect_, draw_transform);
if (visible_content_rect.IsEmpty())
return;
SharedQuadState* shared_quad_state =
render_pass->CreateAndAppendSharedQuadState();
shared_quad_state->SetAll(draw_transform,
content_rect_.size(),
content_rect_,
clip_rect_,
is_clipped_,
draw_opacity_,
owning_layer_->blend_mode(),
owning_layer_->sorting_context_id());
if (owning_layer_->ShowDebugBorders()) {
SkColor color = for_replica ?
DebugColors::SurfaceReplicaBorderColor() :
DebugColors::SurfaceBorderColor();
float width = for_replica ?
DebugColors::SurfaceReplicaBorderWidth(
owning_layer_->layer_tree_impl()) :
DebugColors::SurfaceBorderWidth(
owning_layer_->layer_tree_impl());
DebugBorderDrawQuad* debug_border_quad =
render_pass->CreateAndAppendDrawQuad<DebugBorderDrawQuad>();
debug_border_quad->SetNew(
shared_quad_state, content_rect_, visible_content_rect, color, width);
}
// TODO(shawnsingh): By using the same RenderSurfaceImpl for both the content
// and its reflection, it's currently not possible to apply a separate mask to
// the reflection layer or correctly handle opacity in reflections (opacity
// must be applied after drawing both the layer and its reflection). The
// solution is to introduce yet another RenderSurfaceImpl to draw the layer
// and its reflection in. For now we only apply a separate reflection mask if
// the contents don't have a mask of their own.
LayerImpl* mask_layer = owning_layer_->mask_layer();
if (mask_layer &&
(!mask_layer->DrawsContent() || mask_layer->bounds().IsEmpty()))
mask_layer = NULL;
if (!mask_layer && for_replica) {
mask_layer = owning_layer_->replica_layer()->mask_layer();
if (mask_layer &&
(!mask_layer->DrawsContent() || mask_layer->bounds().IsEmpty()))
mask_layer = NULL;
}
gfx::RectF mask_uv_rect(0.f, 0.f, 1.f, 1.f);
if (mask_layer) {
gfx::Vector2dF owning_layer_draw_scale =
MathUtil::ComputeTransform2dScaleComponents(
owning_layer_->draw_transform(), 1.f);
gfx::SizeF unclipped_mask_target_size = gfx::ScaleSize(
owning_layer_->content_bounds(),
owning_layer_draw_scale.x(),
owning_layer_draw_scale.y());
float uv_scale_x =
content_rect_.width() / unclipped_mask_target_size.width();
float uv_scale_y =
content_rect_.height() / unclipped_mask_target_size.height();
mask_uv_rect = gfx::RectF(
uv_scale_x * content_rect_.x() / content_rect_.width(),
uv_scale_y * content_rect_.y() / content_rect_.height(),
uv_scale_x,
uv_scale_y);
}
ResourceProvider::ResourceId mask_resource_id =
mask_layer ? mask_layer->ContentsResourceId() : 0;
gfx::Rect contents_changed_since_last_frame =
ContentsChanged() ? content_rect_ : gfx::Rect();
RenderPassDrawQuad* quad =
render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
quad->SetNew(shared_quad_state,
content_rect_,
visible_content_rect,
render_pass_id,
for_replica,
mask_resource_id,
contents_changed_since_last_frame,
mask_uv_rect,
owning_layer_->filters(),
owning_layer_->background_filters());
}
} // namespace cc
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