| // 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/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 { |
| |
| // 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 gfx::Size(info_.width(), info_.height()); } |
| UIResourceFormat GetFormat() const { return format_; } |
| bool GetOpaque() const { return info_.isOpaque(); } |
| |
| // 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 EstimateMemoryUsage() const { |
| return pixel_ref_ ? pixel_ref_->rowBytes() * info_.height() : 0; |
| } |
| |
| const uint8_t* GetPixels() const { |
| return static_cast<const uint8_t*>(pixel_ref_->pixels()); |
| } |
| |
| private: |
| friend class AutoLockUIResourceBitmap; |
| |
| void Create(sk_sp<SkPixelRef> pixel_ref, |
| const SkImageInfo& info, |
| UIResourceFormat format); |
| |
| sk_sp<SkPixelRef> pixel_ref_; |
| UIResourceFormat format_; |
| SkImageInfo info_; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_RESOURCES_UI_RESOURCE_BITMAP_H_ |