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/* XPaint-filter */
#include <Xpaint.h>
/*
* The key-word "FilterProcess" is reserved for user-defined filter routines;
* Such a filter processes an "input" image and renders an "output" image.
*
* Pixels are unsigned char arrays p[0]=red, p[1]=green, p[2]=blue
* (thus each value should be in the range 0..255)
*
* In the example below, op = output pixel (input image is not used!)
* The procedure below just creates an image by mapping given functions
* as red, green, blue components...
*/
void FilterProcess(Image * input, Image * output)
{
unsigned char *ip, *op;
int x, y;
for (y = 0; y < input->height; y++) {
for (x = 0; x < input->width; x++) {
op = ImagePixel(output, x, y);
op[0] = (x+y+x*(1000-x)/500)%256;
op[1] = y%256;
op[2] = x%256;
}
}
}
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