libsplashscreen/libpng/pngrtran.c

336     *    premultiply the color channels
338     *    encode the alpha as well as the color channels
342     * premultiplying the color channels or not.
357       case PNG_ALPHA_ASSOCIATED: /* color channels premultiplied */
883  * to alpha channels.
938 /* Expand tRNS chunks to alpha channels. */
952 /* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise
2094       info_ptr->channels = 1;
2097       info_ptr->channels = 3;
2100       info_ptr->channels = 1;
2112       info_ptr->channels++;
2120       info_ptr->channels++;
2135          info_ptr->channels = png_ptr->user_transform_channels;
2139    info_ptr->pixel_depth = (png_byte)(info_ptr->channels *
2251       row_info->pixel_depth = (png_byte)(8 * row_info->channels);
2252       row_info->rowbytes = row_width * row_info->channels;
2277       int channels = 0;
2282          shift[channels++] = bit_depth - sig_bits->red;
2283          shift[channels++] = bit_depth - sig_bits->green;
2284          shift[channels++] = bit_depth - sig_bits->blue;
2289          shift[channels++] = bit_depth - sig_bits->gray;
2294          shift[channels++] = bit_depth - sig_bits->alpha;
2300          for (c = have_shift = 0; c < channels; ++c)
2325          /* assert(channels == 1 && shift[0] == 1) */
2340          /* assert(channels == 1) */
2367                if (++channel >= channels)
2387                if (++channel >= channels)
2453       row_info->pixel_depth = (png_byte)(8 * row_info->channels);
2454       row_info->rowbytes = row_info->width * row_info->channels;
2481       row_info->pixel_depth = (png_byte)(8 * row_info->channels);
2482       row_info->rowbytes = row_info->width * row_info->channels;
2717             row_info->channels = 2;
2732             row_info->channels = 2;
2755             row_info->channels = 2;
2772             row_info->channels = 2;
2796             row_info->channels = 4;
2813             row_info->channels = 4;
2840             row_info->channels = 4;
2862             row_info->channels = 4;
2951       row_info->channels = (png_byte)(row_info->channels + 2);
2953       row_info->pixel_depth = (png_byte)(row_info->channels *
3199       row_info->channels = (png_byte)(row_info->channels - 2);
3202       row_info->pixel_depth = (png_byte)(row_info->channels *
4352                row_info->channels = 4;
4372                row_info->channels = 3;
4535             row_info->channels = 2;
4602          row_info->channels = 4;
4636       row_info->pixel_depth = (png_byte)(row_info->channels * 16);
4685          row_info->channels = 1;
4716          row_info->channels = 1;
5014                 /*  png_byte channels;       number of channels (1-4) */
5015                 /*  png_byte pixel_depth;    bits per pixel (depth*channels) */
5022          row_info->channels = png_ptr->user_transform_channels;
5025           row_info->channels);