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1afab525ff
This is a new swizzle operation which allows us process a reorientation row by row into its new orientation. This will be used in a later part in the series in the image decoding pipeline. Differential Revision: https://phabricator.services.mozilla.com/D126379
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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_GFX_SWIZZLE_H_
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#define MOZILLA_GFX_SWIZZLE_H_
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#include "Point.h"
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#include "Rect.h"
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namespace mozilla {
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namespace image {
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struct Orientation;
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}
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namespace gfx {
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/**
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* Premultiplies source and writes it to destination. Source and destination may
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* be the same to premultiply in-place. The source format must have an alpha
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* channel.
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*/
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GFX2D_API bool PremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
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SurfaceFormat aSrcFormat, uint8_t* aDst,
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int32_t aDstStride, SurfaceFormat aDstFormat,
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const IntSize& aSize);
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/**
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* Unpremultiplies source and writes it to destination. Source and destination
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* may be the same to unpremultiply in-place. Both the source and destination
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* formats must have an alpha channel.
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*/
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GFX2D_API bool UnpremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
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SurfaceFormat aSrcFormat, uint8_t* aDst,
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int32_t aDstStride, SurfaceFormat aDstFormat,
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const IntSize& aSize);
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/**
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* Swizzles source and writes it to destination. Source and destination may be
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* the same to swizzle in-place.
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*/
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GFX2D_API bool SwizzleData(const uint8_t* aSrc, int32_t aSrcStride,
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SurfaceFormat aSrcFormat, uint8_t* aDst,
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int32_t aDstStride, SurfaceFormat aDstFormat,
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const IntSize& aSize);
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/**
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* Swizzles source and writes it to destination. Source and destination may be
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* the same to swizzle in-place.
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*/
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typedef void (*SwizzleRowFn)(const uint8_t* aSrc, uint8_t* aDst,
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int32_t aLength);
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/**
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* Get a function pointer to perform premultiplication between two formats.
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*/
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GFX2D_API SwizzleRowFn PremultiplyRow(SurfaceFormat aSrcFormat,
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SurfaceFormat aDstFormat);
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/**
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* Get a function pointer to perform unpremultiplication between two formats.
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*/
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GFX2D_API SwizzleRowFn UnpremultiplyRow(SurfaceFormat aSrcFormat,
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SurfaceFormat aDstFormat);
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/**
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* Get a function pointer to perform swizzling between two formats.
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*/
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GFX2D_API SwizzleRowFn SwizzleRow(SurfaceFormat aSrcFormat,
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SurfaceFormat aDstFormat);
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/**
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* Reorients source and writes it to destination. Returns the dirty rect of
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* what was changed in aDst.
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*/
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typedef IntRect (*ReorientRowFn)(const uint8_t* aSrc, int32_t aSrcRow,
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uint8_t* aDst, const IntSize& aDstSize,
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int32_t aDstStride);
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/**
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* Get a function pointer to perform reorientation by row.
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*/
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GFX2D_API ReorientRowFn
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ReorientRow(const struct image::Orientation& aOrientation);
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_SWIZZLE_H_ */
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