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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /image/PlaybackType.h | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'image/PlaybackType.h')
-rw-r--r-- | image/PlaybackType.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/image/PlaybackType.h b/image/PlaybackType.h new file mode 100644 index 000000000..0fbc6b024 --- /dev/null +++ b/image/PlaybackType.h @@ -0,0 +1,44 @@ +/* -*- 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_PlaybackType_h +#define mozilla_image_PlaybackType_h + +#include "imgIContainer.h" + +namespace mozilla { +namespace image { + +/** + * PlaybackType identifies a surface cache entry as either a static surface or + * an animation. Note that a specific cache entry is one or the other, but + * images may be associated with both types of cache entries, since in some + * circumstances we may want to treat an animated image as if it were static. + */ +enum class PlaybackType : uint8_t +{ + eStatic, // Calls to DrawableRef() will always return the same surface. + eAnimated // An animation; calls to DrawableRef() may return different + // surfaces at different times. +}; + +/** + * Given an imgIContainer FRAME_* value, returns the corresponding PlaybackType + * for use in surface cache lookups. + */ +inline PlaybackType +ToPlaybackType(uint32_t aWhichFrame) +{ + MOZ_ASSERT(aWhichFrame == imgIContainer::FRAME_FIRST || + aWhichFrame == imgIContainer::FRAME_CURRENT); + return aWhichFrame == imgIContainer::FRAME_CURRENT + ? PlaybackType::eAnimated + : PlaybackType::eStatic; +} + +} // namespace image +} // namespace mozilla + +#endif // mozilla_image_PlaybackType_h |