kc3-lang/libjpeg-turbo/simd/powerpc/jcsample.h

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• Hash : 01e30323
  Author :
  Date : 2019-01-23T14:58:24
  

  Eliminate support for compilers w/o unsigned char
  
  libjpeg-turbo has never really supported such compilers, since (AFAIK)
  they are non-existent on any modern computing platform and thus
  impossible for us to test.  (Also, the TurboJPEG API would break without
  unsigned chars.)
  
  Furthermore, the unified CMake-based build system introduced in 2.0
  always defines HAVE_UNSIGNED_CHAR, so retaining other code paths is
  pointless.  Eliminating support for compilers without unsigned char
  eliminates the need for the GETJSAMPLE() macro, which improves the
  readability of many parts of the code as well as improving the
  performance of writing Targa and Windows BMP files.
  
  Fixes #317
  

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• simd/powerpc/jcsample.h

• /*
   * jcsample.h
   *
   * This file was part of the Independent JPEG Group's software:
   * Copyright (C) 1991-1996, Thomas G. Lane.
   * For conditions of distribution and use, see the accompanying README.ijg
   * file.
   */
  
  LOCAL(void)
  expand_right_edge(JSAMPARRAY image_data, int num_rows, JDIMENSION input_cols,
                    JDIMENSION output_cols)
  {
    register JSAMPROW ptr;
    register JSAMPLE pixval;
    register int count;
    int row;
    int numcols = (int)(output_cols - input_cols);
  
    if (numcols > 0) {
      for (row = 0; row < num_rows; row++) {
        ptr = image_data[row] + input_cols;
        pixval = ptr[-1];
        for (count = numcols; count > 0; count--)
          *ptr++ = pixval;
      }
    }
  }
  

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