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71 lines
2.8 KiB
C
71 lines
2.8 KiB
C
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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#ifndef WEBP_EXTRAS_EXTRAS_H_
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#define WEBP_EXTRAS_EXTRAS_H_
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#include "webp/types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "webp/encode.h"
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#define WEBP_EXTRAS_ABI_VERSION 0x0001 // MAJOR(8b) + MINOR(8b)
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//------------------------------------------------------------------------------
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// Returns the version number of the extras library, packed in hexadecimal using
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// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507.
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WEBP_EXTERN int WebPGetExtrasVersion(void);
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//------------------------------------------------------------------------------
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// Ad-hoc colorspace importers.
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// Import luma sample (gray scale image) into 'picture'. The 'picture'
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// width and height must be set prior to calling this function.
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WEBP_EXTERN int WebPImportGray(const uint8_t* gray, WebPPicture* picture);
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// Import rgb sample in RGB565 packed format into 'picture'. The 'picture'
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// width and height must be set prior to calling this function.
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WEBP_EXTERN int WebPImportRGB565(const uint8_t* rgb565, WebPPicture* pic);
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// Import rgb sample in RGB4444 packed format into 'picture'. The 'picture'
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// width and height must be set prior to calling this function.
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WEBP_EXTERN int WebPImportRGB4444(const uint8_t* rgb4444, WebPPicture* pic);
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// Import a color mapped image. The number of colors is less or equal to
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// MAX_PALETTE_SIZE. 'pic' must have been initialized. Its content, if any,
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// will be discarded. Returns 'false' in case of error, or if indexed[] contains
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// invalid indices.
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WEBP_EXTERN int
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WebPImportColorMappedARGB(const uint8_t* indexed, int indexed_stride,
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const uint32_t palette[], int palette_size,
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WebPPicture* pic);
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//------------------------------------------------------------------------------
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// Parse a bitstream, search for VP8 (lossy) header and report a
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// rough estimation of the quality factor used for compressing the bitstream.
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// If the bitstream is in lossless format, the special value '101' is returned.
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// Otherwise (lossy bitstream), the returned value is in the range [0..100].
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// Any error (invalid bitstream, animated WebP, incomplete header, etc.)
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// will return a value of -1.
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WEBP_EXTERN int VP8EstimateQuality(const uint8_t* const data, size_t size);
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//------------------------------------------------------------------------------
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_EXTRAS_EXTRAS_H_
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