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// Copyright 2019 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_LAYERS_TILE_SIZE_CALCULATOR_H_
#define CC_LAYERS_TILE_SIZE_CALCULATOR_H_
#include "cc/cc_export.h"
#include "ui/gfx/geometry/size.h"
namespace cc {
class PictureLayerImpl;
// This class calculates the tile size only when the |affecting_params_|
// or |content_bounds_| is changed.
class CC_EXPORT TileSizeCalculator {
public:
explicit TileSizeCalculator(PictureLayerImpl* layer_impl);
gfx::Size CalculateTileSize();
private:
struct AffectingParams {
int max_texture_size = 0;
bool use_gpu_rasterization = false;
float device_scale_factor = 0.0f;
gfx::Size max_tile_size;
gfx::Size gpu_raster_max_texture_size;
gfx::Size max_untiled_layer_size;
gfx::Size default_tile_size;
gfx::Size layer_content_bounds;
bool operator==(const AffectingParams& other);
};
PictureLayerImpl* layer_impl() const { return layer_impl_; }
AffectingParams GetAffectingParams();
bool IsAffectingParamsChanged();
PictureLayerImpl* layer_impl_;
AffectingParams affecting_params_;
gfx::Size tile_size_;
};
} // namespace cc
#endif // CC_LAYERS_TILE_SIZE_CALCULATOR_H_
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