// 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.

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

//

// Internal header for animation related functions.

//

// Author: Hui Su (huisu@google.com)

#ifndef WEBP_MUX_ANIMI_H_

#define WEBP_MUX_ANIMI_H_

#include "src/webp/mux.h"

#ifdef __cplusplus

extern "C" {

#endif

// Picks the optimal rectangle between two pictures, starting with initial

// values of offsets and dimensions that are passed in. The initial

// values will be clipped, if necessary, to make sure the rectangle is

// within the canvas. "use_argb" must be true for both pictures.

// Parameters:

//   prev_canvas, curr_canvas - (in) two input pictures to compare.

//   is_lossless, quality - (in) encoding settings.

//   x_offset, y_offset, width, height - (in/out) rectangle between the two

//                                                input pictures.

// Returns true on success.

int WebPAnimEncoderRefineRect(

    const struct WebPPicture* const prev_canvas,

    const struct WebPPicture* const curr_canvas,

    int is_lossless, float quality, int* const x_offset, int* const y_offset,

    int* const width, int* const height);

#ifdef __cplusplus

}    // extern "C"

#endif

#endif  /* WEBP_MUX_ANIMI_H_ */