Draw line on texture Unity3d

gistfile1.txt

void DrawLine(Texture2D tex, int x1, int y1, int x2, int y2, Color col)
{
 	int dy = (int)(y1-y0);
	int dx = (int)(x1-x0);
 	int stepx, stepy;
 
	if (dy < 0) {dy = -dy; stepy = -1;}
	else {stepy = 1;}
	if (dx < 0) {dx = -dx; stepx = -1;}
	else {stepx = 1;}
	dy <<= 1;
	dx <<= 1;
 
	float fraction = 0;
 
	tex.SetPixel(x0, y0, col);
	if (dx > dy) {
		fraction = dy - (dx >> 1);
		while (Mathf.Abs(x0 - x1) > 1) {
			if (fraction >= 0) {
				y0 += stepy;
				fraction -= dx;
			}
			x0 += stepx;
			fraction += dy;
			tex.SetPixel(x0, y0, col);
		}
	}
	else {
		fraction = dx - (dy >> 1);
		while (Mathf.Abs(y0 - y1) > 1) {
			if (fraction >= 0) {
				x0 += stepx;
				fraction -= dy;
			}
			y0 += stepy;
			fraction += dx;
			tex.SetPixel(x0, y0, col);
		}
	}
}