public static void reencode(String orig, FilterType filterType, int cLevel) {
long t0 = System.currentTimeMillis();
String suffix =
filterType.toString().replace("FILTER_", "").toLowerCase() + "_" + String.valueOf(cLevel);
String dest = orig.replaceAll("\\.png$", "") + "_" + suffix + ".png";
PngReader pngr = FileHelper.createPngReader(new File(orig));
PngWriter pngw = FileHelper.createPngWriter(new File(dest), pngr.imgInfo, true);
pngw.setFilterType(filterType);
pngw.setCompLevel(cLevel);
pngw.copyChunksFirst(pngr, ChunkCopyBehaviour.COPY_ALL);
for (int row = 0; row < pngr.imgInfo.rows; row++) {
ImageLine l1 = pngr.readRow(row);
pngw.writeRow(l1, row);
}
pngr.end();
pngw.copyChunksLast(pngr, ChunkCopyBehaviour.COPY_ALL);
pngw.end();
long t1 = System.currentTimeMillis();
long size0 = (new File(orig)).length();
long size1 = (new File(dest)).length();
double sizerel = (size1 * 1000.0) / size0;
System.out.printf("%s\t%d\t%.2f\n", dest, (t1 - t0), sizerel);
}
public static void tryAllFilters(String file, int clevel) {
for (FilterType filter : FilterType.values()) {
reencode(file, filter, clevel);
}
}
