зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.2 KiB
C++
72 строки
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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_image_SurfaceFlags_h
|
|
#define mozilla_image_SurfaceFlags_h
|
|
|
|
#include "imgIContainer.h"
|
|
#include "mozilla/TypedEnumBits.h"
|
|
|
|
namespace mozilla {
|
|
namespace image {
|
|
|
|
/**
|
|
* Flags that change the output a decoder generates. Because different
|
|
* combinations of these flags result in logically different surfaces, these
|
|
* flags must be taken into account in SurfaceCache lookups.
|
|
*/
|
|
enum class SurfaceFlags : uint8_t {
|
|
NO_PREMULTIPLY_ALPHA = 1 << 0,
|
|
NO_COLORSPACE_CONVERSION = 1 << 1,
|
|
TO_SRGB_COLORSPACE = 2 << 1,
|
|
};
|
|
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(SurfaceFlags)
|
|
|
|
/**
|
|
* @return the default set of surface flags.
|
|
*/
|
|
inline SurfaceFlags DefaultSurfaceFlags() { return SurfaceFlags(); }
|
|
|
|
/**
|
|
* Given a set of imgIContainer FLAG_* flags, returns a set of SurfaceFlags with
|
|
* the corresponding flags set.
|
|
*/
|
|
inline SurfaceFlags ToSurfaceFlags(uint32_t aFlags) {
|
|
SurfaceFlags flags = DefaultSurfaceFlags();
|
|
if (aFlags & imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA) {
|
|
flags |= SurfaceFlags::NO_PREMULTIPLY_ALPHA;
|
|
}
|
|
if (aFlags & imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION) {
|
|
flags |= SurfaceFlags::NO_COLORSPACE_CONVERSION;
|
|
}
|
|
if (aFlags & imgIContainer::FLAG_DECODE_TO_SRGB_COLORSPACE) {
|
|
flags |= SurfaceFlags::TO_SRGB_COLORSPACE;
|
|
}
|
|
return flags;
|
|
}
|
|
|
|
/**
|
|
* Given a set of SurfaceFlags, returns a set of imgIContainer FLAG_* flags with
|
|
* the corresponding flags set.
|
|
*/
|
|
inline uint32_t FromSurfaceFlags(SurfaceFlags aFlags) {
|
|
uint32_t flags = imgIContainer::DECODE_FLAGS_DEFAULT;
|
|
if (aFlags & SurfaceFlags::NO_PREMULTIPLY_ALPHA) {
|
|
flags |= imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA;
|
|
}
|
|
if (aFlags & SurfaceFlags::NO_COLORSPACE_CONVERSION) {
|
|
flags |= imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION;
|
|
}
|
|
if (aFlags & SurfaceFlags::TO_SRGB_COLORSPACE) {
|
|
flags |= imgIContainer::FLAG_DECODE_TO_SRGB_COLORSPACE;
|
|
}
|
|
return flags;
|
|
}
|
|
|
|
} // namespace image
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_image_SurfaceFlags_h
|