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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_UI_RESOURCE_BITMAP_H_
#define CC_RESOURCES_UI_RESOURCE_BITMAP_H_
#include <stdint.h>
#include <memory>
#include "base/memory/ref_counted.h"
#include "cc/base/cc_export.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkPixelRef.h"
#include "ui/gfx/geometry/size.h"
class SkBitmap;
namespace cc {
class ETC1PixelRef;
// A bitmap class that contains a ref-counted reference to a SkPixelRef that
// holds the content of the bitmap (cannot use SkBitmap because of ETC1).
// Thread-safety (by ways of SkPixelRef) ensures that both main and impl threads
// can hold references to the bitmap and that asynchronous uploads are allowed.
class CC_EXPORT UIResourceBitmap {
public:
enum UIResourceFormat {
RGBA8,
ALPHA_8,
ETC1
};
gfx::Size GetSize() const { return size_; }
UIResourceFormat GetFormat() const { return format_; }
bool GetOpaque() const { return opaque_; }
void SetOpaque(bool opaque) { opaque_ = opaque; }
// Draw the UIResourceBitmap onto the provided |canvas| using the style
// information specified by |paint|.
void DrawToCanvas(SkCanvas* canvas, SkPaint* paint);
// User must ensure that |skbitmap| is immutable. The SkBitmap Format should
// be 32-bit RGBA or 8-bit ALPHA.
explicit UIResourceBitmap(const SkBitmap& skbitmap);
UIResourceBitmap(const gfx::Size& size, bool is_opaque);
UIResourceBitmap(sk_sp<SkPixelRef> pixel_ref, const gfx::Size& size);
UIResourceBitmap(const UIResourceBitmap& other);
~UIResourceBitmap();
// Returns the memory usage of the bitmap.
size_t GetAllocatedSizeInBytes() const {
return pixel_ref_ ? pixel_ref_->rowBytes() * size_.height() : 0;
}
private:
friend class AutoLockUIResourceBitmap;
void Create(sk_sp<SkPixelRef> pixel_ref,
const gfx::Size& size,
UIResourceFormat format);
sk_sp<SkPixelRef> pixel_ref_;
UIResourceFormat format_;
gfx::Size size_;
bool opaque_;
};
class CC_EXPORT AutoLockUIResourceBitmap {
public:
explicit AutoLockUIResourceBitmap(const UIResourceBitmap& bitmap);
~AutoLockUIResourceBitmap();
const uint8_t* GetPixels() const;
private:
const UIResourceBitmap& bitmap_;
};
} // namespace cc
#endif // CC_RESOURCES_UI_RESOURCE_BITMAP_H_