Generates a checker texture

checker.h

uint8_t* checkerTexture(int w, int h, int num) {
	const int dataSize = w * h * 3;
	uint8_t* texData = new uint8_t[dataSize];
	
	uint8_t c1r = 0x25, c1g = 0x25, c1b = 0x25;
	uint8_t c2r = 0x30, c2g = 0x30, c2b = 0x30;
	
	for (int i = 0; i < h; ++i) {
		bool odd = true;
		if ((i / num) % 2) odd = false;
		for (int j = 0; j < w; ++j) {
			bool white = true;
			if (int(j / num) % 2) white = odd;
			else white = !odd;
			int index = j * 3 + i * w * 3;
			texData[index + 0] = white ? c1r : c2r;
			texData[index + 1] = white ? c1g : c2g;
			texData[index + 2] = white ? c1b : c2b;
		}
	}
	
	return texData;
}