kajott

#if 0  // self-compiling code
gcc -std=c99 -Wall -Wextra -pedantic -g -O3 -march=native $0 -o image_predict || exit 1
exec ./image_predict $*
#endif

// Example code for pre-filtering operations that transform RGB images into
// representations that are better suited for lossless compression
// (color channel separation and decorrelation, pixel prediction).

// Takes a .ppm file as an input and generates multiple files in the form

kajott

10 SCREEN 0: REM This program makes only sense to be run on EGA cards, not VGA!
20 SCREEN 9: H% = 105: GOSUB 1000: LOCATE 9
30 PRINT "Notice the nice rainbow colors above? That's what you can get by reprogramming"
40 PRINT "the EGA palette. Unfortunately, this only works in 350-line mode."
50 PRINT "Press any key to see what it looks like in 200-line mode."
60 WHILE INKEY$ = "": WEND
70 SCREEN 8: H% = 60: GOSUB 1000: LOCATE 9
80 PRINT "Well, that's not nearly as nice as it was in 350-line mode. Turns out, the EGA"
90 PRINT "monitor emulates a CGA monitor in 200-line mode and thus restricts the palette"
100 PRINT "to the 16 CGA colors. Reprogramming the EGA palette can shuffle the CGA colors"

kajott

position=<-58825,   5905> velocity=< 8, -6>
position=< 50749, -19111> velocity=<-7,  4>
position=< 50995,  -8236> velocity=<-3, -5>
position=< 44611, -17672> velocity=<-8,  1>
position=< 41069, -41189> velocity=<-8,  3>
position=<  9181, -56028> velocity=<-6,  2>
position=<-24979,  38514> velocity=<-2,  1>
position=< 19502,  58516> velocity=<-3, -9>
position=< 58524,   6506> velocity=<-9, -1>
position=<-47781,  14688> velocity=<-1, -3>

kajott

#if 0  // self-compiling code
gcc -std=c99 -Wall -Wextra -pedantic -Werror -g -O4 -march=native $0 -lm || exit 1
exec time ./a.out
#endif

// Blue Noise texture generation using the void-and-cluster algorithm
// implemented by Martin Fiedler <[email protected]>
// using an algorithm description written by Alan Wolfe:
// https://blog.demofox.org/2019/06/25/generating-blue-noise-textures-with-void-and-cluster/

kajott

10 CLS : RESTORE 500
20 READ x,y,u,v
30 IF x=999 THEN GOTO 70
40 PLOT 128+x, 88+y : DRAW u-x, v-y
50 PLOT 129+x, 88+y : DRAW u-x, v-y
60 GOTO 20
70 PRINT AT 21,9; "WHAT, ME WORRY?"
80 IF INKEY$ = "" THEN GOTO 80
90 CLS : PRINT "\* 1985 E.C. PUBLICATIONS"
500 DATA -27,-11,-23,-6,-28,-13,-22,-6,-20,-5,-12,-5,-27,-14,-26,-13

kajott

#if 0
gcc -std=c99 -Wall -Wextra -pedantic -g -O4 -march=native $0 -lm || exit 1
./a.out && feh joymap.ppm
exit $?
#endif

// visualization of analog joystick to 8-way digital direction quantization
// see https://github.com/sulix/omnispeak/pull/14

#include <stdbool.h>

kajott

#if 0
g++ -std=c++11 -Wall -Wextra -pedantic -Werror $0 || exit 1
exec ./a.out
#endif

// generate sequences of numbers 0..(1-n) with variable degree of randomness:
// r = 0.0 -> perfectly sorted
// r = 0.5 -> fully shuffled
// r = 1.0 -> perfectly reversed

kajott

#!/usr/bin/env python3
"""
Visualization of various in-place sorting algorithms.

Can generate a HTML page and video files to browse and display the results.

Note: requires FFmpeg to display and export the visualizations.

The code snippets in the HTML report are syntax highlighted if Pygments
is installed.

kajott

#if 0  // self-compiling code: chmod +x this file and run it like a script
BINARY=vaapi_egl_interop_example
gcc -std=c99 -Wall -Wextra -pedantic -Werror -g -fsanitize=address -o $BINARY $0 \
    `pkg-config libavcodec libavformat libavutil libva gl egl libdrm --cflags --libs` \
    -lX11 -lva-x11 -lva-drm || exit 1
test "$1" = "--compile-only" && exit 0
exec env ASAN_OPTIONS=fast_unwind_on_malloc=0 ./$BINARY $*
#endif  /*

Minimal example application for hardware video decoding on Linux and display

kajott

@echo off

@rem "This little script sets a few useful settings in Windows 10 that most"
@rem "serious users are likely to want; scroll through the script for details"
@rem "and disable sections you don't want."

@rem "Usage:"
@rem "Just save this file as a .bat or .cmd file and run it (with"
@rem "Administrator privileges!). You will need to re-run it after larger"
@rem "updates, as these tend to overwrite some of the settings or re-create"