gecko-dev/image/SurfaceFlags.h
Sylvestre Ledru 265e672179 Bug 1511181 - Reformat everything to the Google coding style r=ehsan a=clang-format
# ignore-this-changeset

--HG--
extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
2018-11-30 11:46:48 +01:00

65 lines
2.0 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
};
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;
}
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;
}
return flags;
}
} // namespace image
} // namespace mozilla
#endif // mozilla_image_SurfaceFlags_h