/* -*- 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/. */
/** * Flags that influence decoder behavior. Note that these flags *don't* * influence the logical content of the surfaces that the decoder generates, so * they're not in a factor in SurfaceCache lookups and the like. These flags * instead either influence which surfaces are generated at all or the tune the * decoder's behavior for a particular scenario.
*/ enumclass DecoderFlags : uint8_t {
FIRST_FRAME_ONLY = 1 << 0,
IS_REDECODE = 1 << 1,
IMAGE_IS_TRANSIENT = 1 << 2,
ASYNC_NOTIFY = 1 << 3,
/** * By default, a surface is considered substitutable. That means callers are * willing to accept a less than ideal match to display. If a caller requires * a specific size and won't accept alternatives, then this flag should be * set.
*/
CANNOT_SUBSTITUTE = 1 << 4,
#ifdef MOZ_AV1 // The flags below are stored in RasterImage to allow a decoded image to // remain consistent in whether it is animated or not.
// Set according to the "image.avif.sequence.enabled" preference.
AVIF_SEQUENCES_ENABLED = 1 << 5, // Set according to the // "image.avif.sequence.animate_avif_major_branded_images" preference.
AVIF_ANIMATE_AVIF_MAJOR = 1 << 6, #endif
/** * By default, we don't count how many animated frames there are in an image, * as that would require us to iterate over the entire buffer for some image * formats. If the caller requires a full accounting of how many frames there * are.
*/
COUNT_FRAMES = 1 << 7,
};
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(DecoderFlags)
/** * @return the default set of decode flags.
*/ inline DecoderFlags DefaultDecoderFlags() { return DecoderFlags(); }
} // namespace image
} // namespace mozilla
#endif// mozilla_image_DecoderFlags_h
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