This reverts commit 5d36e382c7.
It's been found to cause all kinds of terrain glitches on Windows and
Linux. Please do not try experimental image compression alternatives
without discussing and reviewing first.
Overall statistics (only for files with a smaller recompressed size):
Original size: 485 KiB on 277 files
Optimized size: 447 KiB
Total saving: 37 KiB = 7% decrease
(not commiting any files that were reported as broken, there are many!)
Original size: 130846 KiB on 10530 files
Optimized size: 127520 KiB
Total saving: 3325 KiB = 2% decrease
NOTE: Extremely many files received (smaller) changes but due to the
extremely large amount of changes I am not 100% sure that this
conversion is correct. This is the output of
utils/png_format_check.sh:
RGBA: 10247 RGB: 10 Gray+A: 256 Gray: 0 Index+A: 0 Index: 0 Other: 0
Overall statistics (only for files with a smaller recompressed size):
Original size: 128949 KiB on 9778 files
Optimized size: 125813 KiB
Total saving: 3135 KiB = 2% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 71209 KiB on 4533 files
Optimized size: 64830 KiB
Total saving: 6379 KiB = 8% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 3 KiB on 1 files
Optimized size: 0 KiB
Total saving: 2 KiB = 73% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 87 KiB on 17 files
Optimized size: 74 KiB
Total saving: 13 KiB = 15% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 3115 KiB on 78 files
Optimized size: 2998 KiB
Total saving: 117 KiB = 3% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 38348 KB on 1487 files
Optimized size: 37219 KB
Total saving: 1128 KB = 2% decrease
...it's not used by mainline or UMC, doesn't overlay or underlay well
with other images, and would basically only be useful for producing
variants of the gohere graphic. This change meands all item/ graphics
have actual uses in mainline.
