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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.
#ifndef CC_SURFACES_SURFACE_AGGREGATOR_H_
#define CC_SURFACES_SURFACE_AGGREGATOR_H_
#include <set>
#include "base/containers/hash_tables.h"
#include "base/containers/scoped_ptr_hash_map.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "cc/quads/draw_quad.h"
#include "cc/quads/render_pass.h"
#include "cc/resources/transferable_resource.h"
#include "cc/surfaces/surface_id.h"
#include "cc/surfaces/surfaces_export.h"
namespace cc {
class CompositorFrame;
class DelegatedFrameData;
class ResourceProvider;
class Surface;
class SurfaceDrawQuad;
class SurfaceManager;
class CC_SURFACES_EXPORT SurfaceAggregatorClient {
public:
virtual ~SurfaceAggregatorClient() {}
virtual void AddSurface(Surface* surface) = 0;
virtual void RemoveSurface(Surface* surface) = 0;
};
class CC_SURFACES_EXPORT SurfaceAggregator {
public:
typedef base::hash_map<SurfaceId, int> SurfaceIndexMap;
SurfaceAggregator(SurfaceAggregatorClient* client,
SurfaceManager* manager,
ResourceProvider* provider,
bool aggregate_only_damaged);
~SurfaceAggregator();
scoped_ptr<CompositorFrame> Aggregate(SurfaceId surface_id);
void ReleaseResources(SurfaceId surface_id);
SurfaceIndexMap& previous_contained_surfaces() {
return previous_contained_surfaces_;
}
void SetFullDamageForSurface(SurfaceId surface_id);
private:
struct ClipData {
ClipData() : is_clipped(false) {}
ClipData(bool is_clipped, const gfx::Rect& rect)
: is_clipped(is_clipped), rect(rect) {}
bool is_clipped;
gfx::Rect rect;
};
struct PrewalkResult {
PrewalkResult();
~PrewalkResult();
bool has_copy_requests = false;
// This is the set of Surfaces that were referenced by another Surface, but
// not included in a SurfaceDrawQuad.
std::set<SurfaceId> undrawn_surfaces;
};
ClipData CalculateClipRect(const ClipData& surface_clip,
const ClipData& quad_clip,
const gfx::Transform& target_transform);
RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
SurfaceId surface_id);
void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
const gfx::Transform& target_transform,
const ClipData& clip_rect,
RenderPass* dest_pass);
SharedQuadState* CopySharedQuadState(const SharedQuadState* source_sqs,
const gfx::Transform& target_transform,
const ClipData& clip_rect,
RenderPass* dest_render_pass);
void CopyQuadsToPass(
const QuadList& source_quad_list,
const SharedQuadStateList& source_shared_quad_state_list,
const base::hash_map<ResourceId, ResourceId>& resource_to_child_map,
const gfx::Transform& target_transform,
const ClipData& clip_rect,
RenderPass* dest_pass,
SurfaceId surface_id);
gfx::Rect PrewalkTree(SurfaceId surface_id, PrewalkResult* result);
void CopyUndrawnSurfaces(PrewalkResult* prewalk);
void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
// Remove Surfaces that were referenced before but aren't currently
// referenced from the ResourceProvider.
// Also notifies SurfaceAggregatorClient of newly added and removed
// child surfaces.
void ProcessAddedAndRemovedSurfaces();
int ChildIdForSurface(Surface* surface);
gfx::Rect DamageRectForSurface(const Surface* surface,
const RenderPass& source,
const gfx::Rect& full_rect) const;
SurfaceAggregatorClient* client_; // Outlives this class.
SurfaceManager* manager_;
ResourceProvider* provider_;
class RenderPassIdAllocator;
typedef base::ScopedPtrHashMap<SurfaceId, scoped_ptr<RenderPassIdAllocator>>
RenderPassIdAllocatorMap;
RenderPassIdAllocatorMap render_pass_allocator_map_;
int next_render_pass_id_;
const bool aggregate_only_damaged_;
typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
// The following state is only valid for the duration of one Aggregate call
// and is only stored on the class to avoid having to pass through every
// function call.
// This is the set of surfaces referenced in the aggregation so far, used to
// detect cycles.
typedef std::set<SurfaceId> SurfaceSet;
SurfaceSet referenced_surfaces_;
// For each Surface used in the last aggregation, gives the frame_index at
// that time.
SurfaceIndexMap previous_contained_surfaces_;
SurfaceIndexMap contained_surfaces_;
// After surface validation, every Surface in this set is valid.
base::hash_set<SurfaceId> valid_surfaces_;
// This is the pass list for the aggregated frame.
RenderPassList* dest_pass_list_;
// The root damage rect of the currently-aggregating frame.
gfx::Rect root_damage_rect_;
// True if the frame that's currently being aggregated has copy requests.
// This is valid during Aggregate after PrewalkTree is called.
bool has_copy_requests_;
// Resource list for the aggregated frame.
TransferableResourceArray* dest_resource_list_;
DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
};
} // namespace cc
#endif // CC_SURFACES_SURFACE_AGGREGATOR_H_