circles.java

public void method212(int i, int j, int k, int l, int i1) {
		int j1 = 256 - i1;
		int k1 = (l >> 16 & 0xff) * i1;
		int l1 = (l >> 8 & 0xff) * i1;
		int i2 = (l & 0xff) * i1;
		int i3 = j - k;
		if (i3 < 0)
				i3 = 0;
		int j3 = j + k;
		if (j3 >= menuDefaultHeight)
				j3 = menuDefaultHeight - 1;
		byte byte0 = 1;
		if (f1Toggle) {
				byte0 = 2;
				if ((i3 & 1) != 0)
						i3++;
		}
		for (int k3 = i3; k3 <= j3; k3 += byte0) {
				int l3 = k3 - j;
				int i4 = (int) Math.sqrt(k * k - l3 * l3);
				int j4 = i - i4;
				if (j4 < 0)
						j4 = 0;
				int k4 = i + i4;
				if (k4 >= menuDefaultWidth)
						k4 = menuDefaultWidth - 1;
				int l4 = j4 + k3 * menuDefaultWidth;
				for (int i5 = j4; i5 <= k4; i5++) {
						int j2 = (imagePixelArray[l4] >> 16 & 0xff) * j1;
						int k2 = (imagePixelArray[l4] >> 8 & 0xff) * j1;
						int l2 = (imagePixelArray[l4] & 0xff) * j1;
						int j5 = ((k1 + j2 >> 8) << 16) + ((l1 + k2 >> 8) << 8) + (i2 + l2 >> 8);
						imagePixelArray[l4++] = j5;
				}

		}
}

/**
 * Renders a transparent circle
 * 
 * @param x The x coordinate
 * @param y The y coordinate
 * @param rad The radius of the circle
 * @param col The color of the circle
 * @param trans The transparency of the circle (ranging from 0-256)
 */
public void drawcircle(int x, int y, int rad, int col, int trans) {
	int opacity = 256 - trans;
	int r = (col >> 16 & 0xff) * trans;
	int g = (col >> 8 & 0xff) * trans;
	int b = (col & 0xff) * trans;
	int miny = y - rad;
	if (miny < 0)
		miny = 0;
	int maxy = y + rad;
	if (maxy >= height)
		maxy = height - 1;
	byte skip = 1;
	if (interlace) {
		skip = 2;
		if ((miny & 1) != 0)
			miny++;
	}
	for(int yy = miny; yy <= maxy; yy += skip) {
		int idx = yy - y;
		int xrad = (int) Math.sqrt(rad * rad - idx * idx);
		int minx = x - xrad;
		if (minx < 0)
			minx = 0;
		int maxx = x + xrad;
		if (maxx >= width)
			maxx = width - 1;
		int ptr = minx + yy * width;
		for (int xx = minx; xx <= maxx; xx++) {
			int cr = (pixels[ptr] >> 16 & 0xff) * opacity;
			int cg = (pixels[ptr] >> 8 & 0xff) * opacity;
			int cb = (pixels[ptr] & 0xff) * opacity;
			int newcol = ((r + cr >> 8) << 16) + ((g + cg >> 8) << 8) + (b + cb >> 8);
			pixels[ptr++] = newcol;
		}
	}
}