Function fillRectangle

modules/data/qrcode/qrcodegen.c:483–488

Sets every pixel in the range [left : left + width] * [top : top + height] to black.

// Sets every pixel in the range [left : left + width] * [top : top + height] to black.
static void fillRectangle(int left, int top, int width, int height, uint8_t qrcode[]) {
	for (int dy = 0; dy < height; dy++) {
		for (int dx = 0; dx < width; dx++)
			setModule(qrcode, left + dx, top + dy, true);
	}
}