Mega Code Archive
Create XOR image texture
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#include <stdio.h>
#include <string.h>
#include <gd.h>
int main(void) {
FILE *pngout = {0};
gdImagePtr img;
int white, color;
int width, height;
int pix, x, y;
int red, green, blue;
width = height = 256;
white = color = pix = x = y = 0;
red = green = blue = 0;
img = gdImageCreateTrueColor(width, height);
white = gdImageColorAllocate(img, 255, 255, 255);
for(x = 0; x < width; x++) {
for(y = 0; y < height; y++) {
/* pix = x ^ y ^ pix; */
pix = x ^ y;
red = gdImageRed(img, pix);
/* red = 255 - pix; */
green = gdImageGreen(img, pix);
/* green = pix; */
blue = gdImageBlue(img, pix);
/* blue = pix % 128; */
color = gdImageColorAllocate(img, red, green, blue);
gdImageSetPixel(img, x, y, color);
}
}
pngout = fopen("xorimagetexture.png", "wb");
gdImagePng(img, pngout);
fclose(pngout);
gdImageDestroy(img);
return 0;
}
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