// Copyright 2012 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.

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

//

// PNG decode.

#ifndef WEBP_IMAGEIO_PNGDEC_H_

#define WEBP_IMAGEIO_PNGDEC_H_

#include "webp/types.h"

#ifdef __cplusplus

extern "C" {

#endif

struct Metadata;

struct WebPPicture;

// Reads a PNG from '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 PNG 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 ReadPNG(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_PNGDEC_H_