// Copyright 2016 Google Inc. All Rights Reserved.

//

// Use of this source code is governed by a BSD-style license

// that can be found in the COPYING file in the root of the source

// tree. An additional intellectual property rights grant can be found

// in the file PATENTS. All contributing project authors may

// be found in the AUTHORS file in the root of the source tree.

// -----------------------------------------------------------------------------

//

//  All-in-one library to decode PNG/JPEG/WebP/TIFF/WIC input images.

//

// Author: Skal (pascal.massimino@gmail.com)

#ifndef WEBP_IMAGEIO_IMAGE_DEC_H_

#define WEBP_IMAGEIO_IMAGE_DEC_H_

#include "webp/types.h"

#ifdef HAVE_CONFIG_H

#include "webp/config.h"

#endif

#include "./metadata.h"

#include "./jpegdec.h"

#include "./pngdec.h"

#include "./pnmdec.h"

#include "./tiffdec.h"

#include "./webpdec.h"

#include "./wicdec.h"

#ifdef __cplusplus

extern "C" {

#endif

typedef enum {

  WEBP_PNG_FORMAT = 0,

  WEBP_JPEG_FORMAT,

  WEBP_TIFF_FORMAT,

  WEBP_WEBP_FORMAT,

  WEBP_PNM_FORMAT,

  WEBP_UNSUPPORTED_FORMAT

} WebPInputFileFormat;

// Try to infer the image format. 'data_size' should be larger than 12.

// Returns WEBP_UNSUPPORTED_FORMAT if format can't be guess safely.

WebPInputFileFormat WebPGuessImageType(const uint8_t* const data,

                                       size_t data_size);

// Signature for common image-reading functions (ReadPNG, ReadJPEG, ...)

typedef int (*WebPImageReader)(const uint8_t* const data, size_t data_size,

                               struct WebPPicture* const pic,

                               int keep_alpha, struct Metadata* const metadata);

// Return the reader associated to a given file format.

WebPImageReader WebPGetImageReader(WebPInputFileFormat format);

// This function is similar to WebPGuessImageType(), but returns a

// suitable reader function. The returned reader is never NULL, but

// unknown formats will return an always-failing valid reader.

WebPImageReader WebPGuessImageReader(const uint8_t* const data,

                                     size_t data_size);

#ifdef __cplusplus

}    // extern "C"

#endif

#endif  // WEBP_IMAGEIO_IMAGE_DEC_H_