blob: 166c8cf91fac3ed056e2e3da617614150054cdec [file] [log] [blame]
# Feed this file to script/make-artificial.go
make gif
header
image {
imageWidthHeight 2 2
palette {
0x00 0x00 0xFF
0x11 0x00 0xFF
0x22 0x00 0xFF
0x33 0x00 0xFF
}
}
frame {
frameLeftTopWidthHeight 0 0 2 2
}
# The frame area is 4 pixels but we supply 5 (that's still valid LZW data).
# Compare with pixel-data-too-much-bad-lzw.gif.make-artificial.txt
#
# The equivalent bytes' disassembly (see also std/lzw/README.md) is:
#
# 0x02 LZW literal width.
# 0x02 GIF block length.
# 0x84 0x5D = 0b0101_1101_1000_0100 (little endian).
# 0b...._...._...._.100 3-bit Clear code.
# 0b...._...._..00_0... 3-bit Literal 0x00.
# 0b...._...1_10.._.... 3-bit Copy code (2 bytes).
# 0b...._110._...._.... 3-bit Copy code (2 bytes).
# 0b0101_...._...._.... 4-bit End code.
# 0x00 GIF block terminator.
lzw 2 0x00 0x00 0x00 0x00 0x00
trailer