Draw-XY

Lightweight image generator.
For customization the source code has to be changed.

Makefile

Env List

Name	Default	What
IN_WIDTH	1600	Input width
IN_HEIGHT	900	Input height
OUT_WIDTH	IN_WIDTH	Output width
OUT_HEIGHT	IN_HEIGHT	Output height
CHANNELS	4	Pixel channel number (1..4: gray, ~ alpha, rgb, ~ alpha)
RATE	24	Frame-rate
LENGTH	image: 0, frames: RATE, video: RATE	Length
FRAME	0	Start frame
INDEX	0	Start index
REPEAT	0	Repeat rendered video X times
IMAGE_FILE	image.png	Output image file
FRAMES_DIR	frames	Output frames dir
VIDEO_FILE	video.mp4	Output video file

Usage

# Image target
make CHANNELS=1 image
make install && ./draw-xy.exe -c 1 | ffmpeg ...

# Frames target
make IN_WIDTH=680 IN_HEIGHT=420 frames
make install && ./draw-xy.exe -w 680 -h 420 | ffmpeg ...

# Frames target on my machine (test)
make CHANNELS=1 IN_WIDTH=320 IN_HEIGHT=280 RATE=60 frames && sxiv frames

# Video target
make REPEAT=2 video

# Video target on my machine (test)
make REPEAT_VIDEO=5 CHANNELS=3 IN_WIDTH=3840 IN_HEIGHT=2160 RATE=60 video && mpv --loop-file video.mp4 --video-unscaled

For Source Code Editing

Globals

// config.h
#ifdef __CONFIG_EXTERN__
extern
#endif
    int config_width,
    config_height,
    config_channels,
    config_rate,
    config_frame,
    config_index,
    config_length,
    config_image_bytes,
    config_pixels_count,
    config_buffer_size;

What to Change?

// plot.c
#include "..."

void plot(unsigned char pixel[], double x, double y)
{
    // Your Code Here
    pixel[0] = pixel[3] = 255 * sin(x * y) / cos(y / x) / atan((double)config_index / config_rate);
}

Output Examples

XCP Red Image

# XCP Red
make CHANNELS=3 IN_WIDTH=16000 IN_HEIGHT=9000 OUT_WIDTH=1600 OUT_HEIGHT=900 image && sxiv image.png

XCP Red 4k60 Video

# XCP Red 4k60 Video
make REPEAT_VIDEO=5 CHANNELS=3 IN_WIDTH=3840 IN_HEIGHT=2160 RATE=60 video && mpv --loop-file video.mp4 --video-unscaled

XCP Red 4k60 Video Link

License

GPLv3

See notice in ACKNOWLEDGEMENTS.md