text: // 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 "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_ */
  