Commit 3026131d authored by Dimitri van Heesch's avatar Dimitri van Heesch
Browse files

Bug 736029 - [PATCH] Remove redundant if/else branch in src/lodepng.cpp

parent e7b9f1d1

src/lodepng.cpp

+3 −12
Original line number Original line Diff line number Diff line
@@ -3535,20 +3535,11 @@ static void filterScanline(unsigned char* out, const unsigned char* scanline, co 
  switch(filterType)

  switch(filterType)

  {

  {

    case 0:

    case 0:

      if(prevline) for(i = 0; i < length; i++) out[i] = scanline[i];

      for(i = 0; i < length; i++) out[i] = scanline[i];

      else         for(i = 0; i < length; i++) out[i] = scanline[i];

      break;

      break;

    case 1:

    case 1:

      if(prevline)

      {

        for(i =         0; i < bytewidth; i++) out[i] = scanline[i];

        for(i = bytewidth; i < length   ; i++) out[i] = scanline[i] - scanline[i - bytewidth];

      }

      else

      {

      for(i =         0; i < bytewidth; i++) out[i] = scanline[i];

      for(i =         0; i < bytewidth; i++) out[i] = scanline[i];

      for(i = bytewidth; i <    length; i++) out[i] = scanline[i] - scanline[i - bytewidth];

      for(i = bytewidth; i <    length; i++) out[i] = scanline[i] - scanline[i - bytewidth];

      }

      break;

      break;

    case 2:

    case 2:

      if(prevline) for(i = 0; i < length; i++) out[i] = scanline[i] - prevline[i];

      if(prevline) for(i = 0; i < length; i++) out[i] = scanline[i] - prevline[i];