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// Copyright 2013 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_RESOURCES_MANAGED_TILE_STATE_H_
#define CC_RESOURCES_MANAGED_TILE_STATE_H_
#include "base/memory/scoped_ptr.h"
#include "cc/resources/platform_color.h"
#include "cc/resources/raster_worker_pool.h"
#include "cc/resources/resource_pool.h"
#include "cc/resources/resource_provider.h"
#include "cc/resources/scoped_resource.h"
namespace cc {
class TileManager;
// Tile manager classifying tiles into a few basic bins:
enum ManagedTileBin {
NOW_AND_READY_TO_DRAW_BIN = 0, // Ready to draw and within viewport.
NOW_BIN = 1, // Needed ASAP.
SOON_BIN = 2, // Impl-side version of prepainting.
EVENTUALLY_AND_ACTIVE_BIN = 3, // Nice to have, and has a task or resource.
EVENTUALLY_BIN = 4, // Nice to have, if we've got memory and time.
AT_LAST_AND_ACTIVE_BIN = 5, // Only do this after all other bins.
AT_LAST_BIN = 6, // Only do this after all other bins.
NEVER_BIN = 7, // Dont bother.
NUM_BINS = 8
// NOTE: Be sure to update ManagedTileBinAsValue and kBinPolicyMap when adding
// or reordering fields.
};
scoped_ptr<base::Value> ManagedTileBinAsValue(ManagedTileBin bin);
// This is state that is specific to a tile that is
// managed by the TileManager.
class CC_EXPORT ManagedTileState {
public:
class CC_EXPORT TileVersion {
public:
enum Mode { RESOURCE_MODE, SOLID_COLOR_MODE, PICTURE_PILE_MODE };
TileVersion();
~TileVersion();
Mode mode() const { return mode_; }
bool IsReadyToDraw() const;
ResourceProvider::ResourceId get_resource_id() const {
DCHECK(mode_ == RESOURCE_MODE);
DCHECK(resource_);
return resource_->id();
}
SkColor get_solid_color() const {
DCHECK(mode_ == SOLID_COLOR_MODE);
return solid_color_;
}
bool contents_swizzled() const {
DCHECK(resource_);
return !PlatformColor::SameComponentOrder(resource_->format());
}
bool requires_resource() const {
return mode_ == RESOURCE_MODE || mode_ == PICTURE_PILE_MODE;
}
size_t GPUMemoryUsageInBytes() const;
void SetSolidColorForTesting(SkColor color) { set_solid_color(color); }
void SetHasTextForTesting(bool has_text) { has_text_ = has_text; }
private:
friend class TileManager;
friend class PrioritizedTileSet;
friend class Tile;
friend class ManagedTileState;
void set_use_resource() { mode_ = RESOURCE_MODE; }
void set_solid_color(const SkColor& color) {
mode_ = SOLID_COLOR_MODE;
solid_color_ = color;
}
void set_has_text(bool has_text) { has_text_ = has_text; }
void set_rasterize_on_demand() { mode_ = PICTURE_PILE_MODE; }
Mode mode_;
SkColor solid_color_;
bool has_text_;
scoped_ptr<ScopedResource> resource_;
RasterWorkerPool::RasterTask raster_task_;
};
ManagedTileState();
~ManagedTileState();
scoped_ptr<base::Value> AsValue() const;
// Persisted state: valid all the time.
TileVersion tile_versions[NUM_RASTER_MODES];
RasterMode raster_mode;
ManagedTileBin bin;
TileResolution resolution;
bool required_for_activation;
float time_to_needed_in_seconds;
float distance_to_visible_in_pixels;
bool visible_and_ready_to_draw;
// Priority for this state from the last time we assigned memory.
unsigned scheduled_priority;
};
} // namespace cc
#endif // CC_RESOURCES_MANAGED_TILE_STATE_H_
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