зеркало из https://github.com/mozilla/gecko-dev.git
65 строки
1.8 KiB
C++
65 строки
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim:set ts=2 sw=2 sts=2 et cindent: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_dom_ImageBitmapFormatUtils_h
|
|
#define mozilla_dom_ImageBitmapFormatUtils_h
|
|
|
|
#include "mozilla/UniquePtr.h"
|
|
#include "nsTArrayForwardDeclare.h"
|
|
|
|
namespace mozilla {
|
|
|
|
namespace layers {
|
|
class Image;
|
|
}
|
|
|
|
class ErrorResult;
|
|
|
|
namespace dom {
|
|
|
|
struct ChannelPixelLayout;
|
|
enum class ImageBitmapFormat : uint8_t;
|
|
|
|
typedef nsTArray<ChannelPixelLayout> ImagePixelLayout;
|
|
|
|
/*
|
|
* ImageUtils is a wrapper around layers::Image. It provides three unified
|
|
* methods to all sub-classes of layers::Image, which are:
|
|
*
|
|
* (1) GetFormat() converts the image's format into ImageBitmapFormat enum.
|
|
* (2) GetBufferLength() returns the number of bytes that are used to store
|
|
* the image's underlying raw data.
|
|
*
|
|
* In theory, the functionalities of this class could be merged into the
|
|
* interface of layers::Image. However, this is designed as a isolated wrapper
|
|
* because we don't want to pollute the layers::Image's interface with methods
|
|
* that are only meaningful to the ImageBitmap.
|
|
*/
|
|
class ImageUtils {
|
|
public:
|
|
class Impl;
|
|
ImageUtils() = delete;
|
|
ImageUtils(const ImageUtils&) = delete;
|
|
ImageUtils(ImageUtils&&) = delete;
|
|
ImageUtils& operator=(const ImageUtils&) = delete;
|
|
ImageUtils& operator=(ImageUtils&&) = delete;
|
|
|
|
explicit ImageUtils(layers::Image* aImage);
|
|
~ImageUtils();
|
|
|
|
ImageBitmapFormat GetFormat() const;
|
|
|
|
uint32_t GetBufferLength() const;
|
|
|
|
protected:
|
|
Impl* mImpl;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif /* mozilla_dom_ImageBitmapFormatUtils_h */
|