ce8733209d
Also introduce an always-failing 'reader' for unknown formats. So we don't have to check reader==NULL, code is more regular. -> We can get read of specific ReadPNG(), ReadJPEG(), ... declaration and use. Change-Id: I290759705420878f00c7223c726d4ad404afd9c4
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
// Copyright 2016 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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// All-in-one library to decode PNG/JPEG/WebP/TIFF/WIC input images.
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//
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// Author: Skal (pascal.massimino@gmail.com)
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#ifndef WEBP_IMAGEIO_IMAGE_DEC_H_
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#define WEBP_IMAGEIO_IMAGE_DEC_H_
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#include "webp/types.h"
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#ifdef HAVE_CONFIG_H
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#include "webp/config.h"
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#endif
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#include "./metadata.h"
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#include "./jpegdec.h"
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#include "./pngdec.h"
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#include "./tiffdec.h"
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#include "./webpdec.h"
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#include "./wicdec.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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WEBP_PNG_FORMAT = 0,
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WEBP_JPEG_FORMAT,
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WEBP_TIFF_FORMAT,
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WEBP_WEBP_FORMAT,
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WEBP_UNSUPPORTED_FORMAT
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} WebPInputFileFormat;
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// Try to infer the image format. 'data_size' should be larger than 12.
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// Returns WEBP_UNSUPPORTED_FORMAT if format can't be guess safely.
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WebPInputFileFormat WebPGuessImageType(const uint8_t* const data,
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size_t data_size);
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// Signature for common image-reading functions (ReadPNG, ReadJPEG, ...)
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typedef int (*WebPImageReader)(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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// Return the reader associated to a given file format.
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WebPImageReader WebPGetImageReader(WebPInputFileFormat format);
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// This function is similar to WebPGuessImageType(), but returns a
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// suitable reader function. The returned reader is never NULL, but
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// unknown formats will return an always-failing valid reader.
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WebPImageReader WebPGuessImageReader(const uint8_t* const data,
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size_t data_size);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_IMAGEIO_IMAGE_DEC_H_
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