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cleanup: Color

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This commit is contained in:
Hannes Janetzek 2014-01-25 09:59:28 +01:00
parent 45b851c55c
commit f8603dafe1
1 changed files with 77 additions and 93 deletions
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150
vtm/src/org/oscim/backend/canvas/Color.java
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@ -14,6 +14,73 @@
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.oscim.backend.canvas;
import org.oscim.utils.FastMath;
public class Color {
public static int fade(int color, double alpha) {
alpha = FastMath.clamp(alpha, 0, 1);
alpha *= (color >>> 24) & 0xff;
int c = (((int) alpha) & 0xff) << 24;
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 int rainbow(float pos) {
float i = 255 * pos;
int r = (int) Math.round(Math.sin(0.024 * i + 0) * 127 + 128);
int g = (int) Math.round(Math.sin(0.024 * i + 2) * 127 + 128);
int b = (int) Math.round(Math.sin(0.024 * i + 4) * 127 + 128);
return 0xff000000 | (r << 16) | (g << 8) | b;
}
/**
* Pack r, g, b bytes into one int.
*/
public static int get(int r, int g, int b) {
return 0xff << 24 | r << 16 | g << 8 | b;
}
/**
* Pack premultiplied a, r, g, b bytes into one int.
*/
public static int get(int a, int r, int g, int b) {
return a << 24 | r << 16 | g << 8 | b;
}
/**
* Pack r, g, b bytes into one int with premultiplied alpha a.
*/
public static int get(float a, int r, int g, int b) {
return fade(0xff << 24 | r << 16 | g << 8 | b, a);
}
public static float rToFloat(int color) {
return ((color >>> 16) & 0xff) / 255f;
}
public static float gToFloat(int color) {
return ((color >>> 8) & 0xff) / 255f;
}
public static float bToFloat(int color) {
return ((color) & 0xff) / 255f;
}
public static float aToFloat(int color) {
return ((color >>> 24) & 0xff) / 255f;
}
/*
* Copyright (C) 2006 The Android Open Source Project
*
@ -29,63 +96,19 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.oscim.backend.canvas;
import org.oscim.utils.FastMath;
/**
* The Class Color.
*/
public class Color {
/** The Constant BLACK. */
public static final int BLACK = 0xFF000000;
/** The Constant DKGRAY. */
public static final int DKGRAY = 0xFF444444;
/** The Constant GRAY. */
public static final int GRAY = 0xFF888888;
/** The Constant LTGRAY. */
public static final int LTGRAY = 0xFFCCCCCC;
/** The Constant WHITE. */
public static final int WHITE = 0xFFFFFFFF;
/** The Constant RED. */
public static final int RED = 0xFFFF0000;
/** The Constant GREEN. */
public static final int GREEN = 0xFF00FF00;
/** The Constant BLUE. */
public static final int BLUE = 0xFF0000FF;
/** The Constant YELLOW. */
public static final int YELLOW = 0xFFFFFF00;
/** The Constant CYAN. */
public static final int CYAN = 0xFF00FFFF;
/** The Constant MAGENTA. */
public static final int MAGENTA = 0xFFFF00FF;
/** The Constant TRANSPARENT. */
public static final int TRANSPARENT = 0;
/**
* Pack 8 bit r, g, b into one int.
*
* @param r the r
* @param g the g
* @param b the b
* @return the int
*/
public static int get(int r, int g, int b) {
return 0xff << 24 | r << 16 | g << 8 | b;
}
/**
* Parse the color string, and return the corresponding color-int.
* If the string cannot be parsed, throws an IllegalArgumentException
@ -112,43 +135,4 @@ public class Color {
}
throw new IllegalArgumentException("Unknown color");
}
public static int fade(int color, double alpha) {
alpha = FastMath.clamp(alpha, 0, 1);
alpha *= (color >>> 24) & 0xff;
int c = (((int) alpha) & 0xff) << 24;
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) {
return ((color >>> 16) & 0xff) / 255f;
}
public static float gToFloat(int color) {
return ((color >>> 8) & 0xff) / 255f;
}
public static float bToFloat(int color) {
return ((color) & 0xff) / 255f;
}
public static float aToFloat(int color) {
return ((color >>> 24) & 0xff) / 255f;
}
public static int rainbow(float pos) {
float i = 255 * pos;
int r = (int) Math.round(Math.sin(0.024 * i + 0) * 127 + 128);
int g = (int) Math.round(Math.sin(0.024 * i + 2) * 127 + 128);
int b = (int) Math.round(Math.sin(0.024 * i + 4) * 127 + 128);
return 0xff000000 | (r << 16) | (g << 8) | b;
}
}