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cwebp: add a -sharp_yuv option for 'sharp' RGB->YUV conversion

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Change-Id: I6edd5b44d693da50f702fa8218f14872874d91ba
This commit is contained in:
Pascal Massimino
2017-01-20 16:53:58 +01:00
parent 79bf46f120
commit 4689ce1635
6 changed files with 20 additions and 5 deletions
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7
examples/cwebp.c
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@ -549,6 +549,8 @@ static void HelpLong(void) {
printf(" -strong ................ use strong filter instead "
"of simple (default)\n");
printf(" -nostrong .............. use simple filter instead of strong\n");
printf(" -sharp_yuv ............. use sharper (and slower) RGB->YUV "
"conversion\n");
printf(" -partition_limit <int> . limit quality to fit the 512k limit on\n");
printf(" "
"the first partition (0=no degradation ... 100=full)\n");
@ -787,6 +789,8 @@ int main(int argc, const char *argv[]) {
config.filter_type = 0;
} else if (!strcmp(argv[c], "-sharpness") && c < argc - 1) {
config.filter_sharpness = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-sharp_yuv")) {
config.use_sharp_yuv = 1;
} else if (!strcmp(argv[c], "-pass") && c < argc - 1) {
config.pass = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-pre") && c < argc - 1) {
@ -945,7 +949,8 @@ int main(int argc, const char *argv[]) {
// Read the input. We need to decide if we prefer ARGB or YUVA
// samples, depending on the expected compression mode (this saves
// some conversion steps).
picture.use_argb = (config.lossless || config.preprocessing > 0 ||
picture.use_argb = (config.lossless || config.use_sharp_yuv ||
config.preprocessing > 0 ||
crop || (resize_w | resize_h) > 0);
if (verbose) {
StopwatchReset(&stop_watch);