// Copyright 2014 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.

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

//

// WebP decode.

#ifndef WEBP_IMAGEIO_WEBPDEC_H_

#define WEBP_IMAGEIO_WEBPDEC_H_

#include "webp/decode.h"

#ifdef __cplusplus

extern "C" {

#endif

struct Metadata;

struct WebPPicture;

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

// WebP decoding

// Prints an informative error message regarding decode failure of 'in_file'.

// 'status' is treated as a VP8StatusCode and if valid will be printed as a

// text string.

void PrintWebPError(const char* const in_file, int status);

// Reads a WebP from 'in_file', returning the contents and size in 'data' and

// 'data_size'. If not NULL, 'bitstream' is populated using WebPGetFeatures().

// Returns true on success.

int LoadWebP(const char* const in_file,

             const uint8_t** data, size_t* data_size,

             WebPBitstreamFeatures* bitstream);

// Decodes the WebP contained in 'data'.

// 'config' is a structure previously initialized by WebPInitDecoderConfig().

// 'config->output' should have the desired colorspace selected.

// Returns the decoder status. On success 'config->output' will contain the

// decoded picture.

VP8StatusCode DecodeWebP(const uint8_t* const data, size_t data_size,

                         WebPDecoderConfig* const config);

// Same as DecodeWebP(), but using the incremental decoder.

VP8StatusCode DecodeWebPIncremental(

    const uint8_t* const data, size_t data_size,

    WebPDecoderConfig* const config);

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

// Decodes a WebP contained in 'data', returning the decoded output in 'pic'.

// Output is RGBA or YUVA, depending on pic->use_argb value.

// If 'keep_alpha' is true and the WebP has an alpha channel, the output is RGBA

// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.

// Returns true on success.

int ReadWebP(const uint8_t* const data, size_t data_size,

             struct WebPPicture* const pic,

             int keep_alpha, struct Metadata* const metadata);

#ifdef __cplusplus

}    // extern "C"

#endif

#endif  // WEBP_IMAGEIO_WEBPDEC_H_