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265e672179
# ignore-this-changeset --HG-- extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_image_SurfaceFlags_h
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#define mozilla_image_SurfaceFlags_h
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#include "imgIContainer.h"
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#include "mozilla/TypedEnumBits.h"
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namespace mozilla {
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namespace image {
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/**
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* Flags that change the output a decoder generates. Because different
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* combinations of these flags result in logically different surfaces, these
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* flags must be taken into account in SurfaceCache lookups.
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*/
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enum class SurfaceFlags : uint8_t {
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NO_PREMULTIPLY_ALPHA = 1 << 0,
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NO_COLORSPACE_CONVERSION = 1 << 1
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};
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MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(SurfaceFlags)
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/**
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* @return the default set of surface flags.
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*/
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inline SurfaceFlags DefaultSurfaceFlags() { return SurfaceFlags(); }
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/**
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* Given a set of imgIContainer FLAG_* flags, returns a set of SurfaceFlags with
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* the corresponding flags set.
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*/
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inline SurfaceFlags ToSurfaceFlags(uint32_t aFlags) {
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SurfaceFlags flags = DefaultSurfaceFlags();
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if (aFlags & imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA) {
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flags |= SurfaceFlags::NO_PREMULTIPLY_ALPHA;
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}
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if (aFlags & imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION) {
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flags |= SurfaceFlags::NO_COLORSPACE_CONVERSION;
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}
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return flags;
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}
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/**
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* Given a set of SurfaceFlags, returns a set of imgIContainer FLAG_* flags with
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* the corresponding flags set.
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*/
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inline uint32_t FromSurfaceFlags(SurfaceFlags aFlags) {
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uint32_t flags = imgIContainer::DECODE_FLAGS_DEFAULT;
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if (aFlags & SurfaceFlags::NO_PREMULTIPLY_ALPHA) {
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flags |= imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA;
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}
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if (aFlags & SurfaceFlags::NO_COLORSPACE_CONVERSION) {
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flags |= imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION;
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}
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return flags;
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}
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_SurfaceFlags_h
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