mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 08:35:26 +00:00
45 lines
1.5 KiB
C++
45 lines
1.5 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_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
|