Function rgba16ToPixel

src/lodepng.cpp:3056–3097

put a pixel, given its RGBA16 color, into image of any color 16-bitdepth type*/

/*put a pixel, given its RGBA16 color, into image of any color 16-bitdepth type*/
static unsigned rgba16ToPixel(unsigned char* out, size_t i,
                              const LodePNGColorMode* mode,
                              unsigned short r, unsigned short g, unsigned short b, unsigned short a)
{
  if(mode->bitdepth != 16) return 85; /*must be 16 for this function*/
  if(mode->colortype == LCT_GREY)
  {
    unsigned short grey = r; /*((unsigned)r + g + b) / 3*/;
    out[i * 2 + 0] = (grey >> 8) & 255;
    out[i * 2 + 1] = grey & 255;
  }
  else if(mode->colortype == LCT_RGB)
  {
    out[i * 6 + 0] = (r >> 8) & 255;
    out[i * 6 + 1] = r & 255;
    out[i * 6 + 2] = (g >> 8) & 255;
    out[i * 6 + 3] = g & 255;
    out[i * 6 + 4] = (b >> 8) & 255;
    out[i * 6 + 5] = b & 255;
  }
  else if(mode->colortype == LCT_GREY_ALPHA)
  {
    unsigned short grey = r; /*((unsigned)r + g + b) / 3*/;
    out[i * 4 + 0] = (grey >> 8) & 255;
    out[i * 4 + 1] = grey & 255;
    out[i * 4 + 2] = (a >> 8) & 255;
    out[i * 4 + 3] = a & 255;
  }
  else if(mode->colortype == LCT_RGBA)
  {
    out[i * 8 + 0] = (r >> 8) & 255;
    out[i * 8 + 1] = r & 255;
    out[i * 8 + 2] = (g >> 8) & 255;
    out[i * 8 + 3] = g & 255;
    out[i * 8 + 4] = (b >> 8) & 255;
    out[i * 8 + 5] = b & 255;
    out[i * 8 + 6] = (a >> 8) & 255;
    out[i * 8 + 7] = a & 255;
  }

  return 0; /*no error*/
}

/*Get RGBA8 color of pixel with index i (y * width + x) from the raw image with given color type.*/
static unsigned getPixelColorRGBA8(unsigned char* r, unsigned char* g,