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68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
// Copyright 2014 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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// WebP decode.
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#ifndef WEBP_IMAGEIO_WEBPDEC_H_
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#define WEBP_IMAGEIO_WEBPDEC_H_
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#include "webp/decode.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Metadata;
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struct WebPPicture;
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//------------------------------------------------------------------------------
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// WebP decoding
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// Prints an informative error message regarding decode failure of 'in_file'.
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// 'status' is treated as a VP8StatusCode and if valid will be printed as a
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// text string.
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void PrintWebPError(const char* const in_file, int status);
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// Reads a WebP from 'in_file', returning the contents and size in 'data' and
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// 'data_size'. If not NULL, 'bitstream' is populated using WebPGetFeatures().
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// Returns true on success.
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int LoadWebP(const char* const in_file,
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const uint8_t** data, size_t* data_size,
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WebPBitstreamFeatures* bitstream);
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// Decodes the WebP contained in 'data'.
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// 'config' is a structure previously initialized by WebPInitDecoderConfig().
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// 'config->output' should have the desired colorspace selected.
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// Returns the decoder status. On success 'config->output' will contain the
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// decoded picture.
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VP8StatusCode DecodeWebP(const uint8_t* const data, size_t data_size,
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WebPDecoderConfig* const config);
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// Same as DecodeWebP(), but using the incremental decoder.
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VP8StatusCode DecodeWebPIncremental(
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const uint8_t* const data, size_t data_size,
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WebPDecoderConfig* const config);
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//------------------------------------------------------------------------------
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// Decodes a WebP contained in 'data', returning the decoded output in 'pic'.
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// Output is RGBA or YUVA, depending on pic->use_argb value.
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// If 'keep_alpha' is true and the WebP has an alpha channel, the output is RGBA
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// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
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// Returns true on success.
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int ReadWebP(const uint8_t* const data, size_t data_size,
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struct WebPPicture* const pic,
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int keep_alpha, struct Metadata* const metadata);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_IMAGEIO_WEBPDEC_H_
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