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fix: Color.fade()

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This commit is contained in:
Hannes Janetzek 2014-01-19 16:10:57 +01:00
parent ab56e9c212
commit 42a6887ae2
1 changed files with 13 additions and 5 deletions
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18
vtm/src/org/oscim/backend/canvas/Color.java
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@ -31,6 +31,8 @@
*/ */
package org.oscim.backend.canvas; package org.oscim.backend.canvas;
import org.oscim.utils.FastMath;
/** /**
* The Class Color. * The Class Color.
*/ */
@ -112,12 +114,18 @@ public class Color {
} }
public static int fade(int color, double alpha) { public static int fade(int color, double alpha) {
alpha *= ((color >>> 24) & 0xff); alpha = FastMath.clamp(alpha, 0, 1);
return ((int) alpha) << 24 alpha *= (color >>> 24) & 0xff;
| ((int) alpha * ((color >>> 16) & 0xff)) << 16 int c = (((int) alpha) & 0xff) << 24;
| ((int) alpha * ((color >>> 8) & 0xff)) << 8
| ((int) alpha * ((color) & 0xff)); alpha /= 255;
c |= ((int) (alpha * ((color >>> 16) & 0xff))) << 16;
c |= ((int) (alpha * ((color >>> 8) & 0xff))) << 8;
c |= ((int) (alpha * (color & 0xff)));
return c;
} }
public static float rToFloat(int color) { public static float rToFloat(int color) {