Princess Principal (2023-03-01)
PNG splitters.
Each program accepts 3 arguments:
prog input.png output1.png output2.png
Which reads input.png and writes two output files, such that the two
images overlaid on top of each other will restore the original image.
Basically the first output file is same as the input file with some
a pattern of transparent pixels added, and the second output file is
the same but the location of the transparent pixels are inverted.
Ten executables are packaged here, each with a different pattern:
ange1.exe ange2.exe
charlotte1.exe charlotte2.exe
dorothy1.exe dorothy2.exe
beatrice1.exe beatrice2.exe
chise1.exe chise2.exe
Note that there are 10 executables, but only 5 source files. Each
source file produces two executables based on whether they are
compiled as C or C++, for example:
gcc ange.c -lm -lpng -o ange1.exe
g++ ange.c -lm -lpng -o ange2.exe
Input can be valid PNG images in any format, including those with
transparencies. This allows running multiple programs in series to
combine different patterns. Output will always be 8bit RGBA.
Demo: https://twitter.com/uguu_org/status/1631207051602042880
A few other helpful PNG utilities are also included:
stack_png.exe input.png... > output.png
Overlay a list of PNGs and write result to stdout, useful for
reconstructing the original input images to the PNG splitters.
"-" can be used as a filename to read from stdin instead.
make_png.exe width height r g b a > output.png
Generate a PNG of arbitrary size and color to stdout. Default
for rgba values are 255 (i.e. opaque white).
concat_png_lr.exe input.png... > output.png
concat_png_tb.exe input.png... > output.png
Concatenate PNG files from left to right or top to bottom, and
write output to stdout. "-" can be used as a filename to read
from stdin instead. Each input file is read only once, so "-"
and named pipes can be specified multiple times.
Replays for how the ASCII arts were made can be found under edit/
directory.
Templates are based on characters from Princess Principal.
--
omoikane@uguu.org - https://uguu.org/