github.com/cellofellow/gopkg@v0.0.0-20140722061823-eec0544a62ad/image/webp/libwebp/examples/pngdec.h (about)

     1  // Copyright 2012 Google Inc. All Rights Reserved.
     2  //
     3  // Use of this source code is governed by a BSD-style license
     4  // that can be found in the COPYING file in the root of the source
     5  // tree. An additional intellectual property rights grant can be found
     6  // in the file PATENTS. All contributing project authors may
     7  // be found in the AUTHORS file in the root of the source tree.
     8  // -----------------------------------------------------------------------------
     9  //
    10  // PNG decode.
    11  
    12  #ifndef WEBP_EXAMPLES_PNGDEC_H_
    13  #define WEBP_EXAMPLES_PNGDEC_H_
    14  
    15  #include <stdio.h>
    16  
    17  #ifdef __cplusplus
    18  extern "C" {
    19  #endif
    20  
    21  struct Metadata;
    22  struct WebPPicture;
    23  
    24  // Reads a PNG from 'in_file', returning the decoded output in 'pic'.
    25  // If 'keep_alpha' is true and the PNG has an alpha channel, the output is RGBA
    26  // otherwise it will be RGB.
    27  // Returns true on success.
    28  int ReadPNG(FILE* in_file, struct WebPPicture* const pic, int keep_alpha,
    29              struct Metadata* const metadata);
    30  
    31  #ifdef __cplusplus
    32  }    // extern "C"
    33  #endif
    34  
    35  #endif  // WEBP_EXAMPLES_PNGDEC_H_