mirrors/Terra
1
0
Fork 0
mirror of https://github.com/PolyhedralDev/Terra.git synced 2025-07-03 08:25:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

Implement premultiplication in ColorUtil

Browse Source
This commit is contained in:
Astrash 2023-05-01 13:57:07 +10:00
parent ff0985bd31
commit ffa55cb7a3
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
common/addons/library-image/src/main/java/com/dfsek/terra/addons/image/util/ColorUtil.java
View File

@ -61,6 +61,29 @@ public class ColorUtil {
return channel.zero(rgb);
}
/*
* Multiply each color channel by the alpha channel
*/
public static int premultiply(int rgb) {
int alpha = getAlpha(rgb);
int red = (getRed(rgb) * alpha + 127) / 255;
int green = (getGreen(rgb) * alpha + 127) / 255;
int blue = (getBlue(rgb) * alpha + 127) / 255;
return rgb(alpha, red, green, blue);
}
public static int rgb(int alpha, int red, int green, int blue) {
return rgbAlpha(alpha) | rgbRed(red) | rgbGreen(green) | rgbBlue(blue);
}
public static int rgbAlpha(int alpha) { return alpha << 24; }
public static int rgbRed(int red) { return red << 16; }
public static int rgbGreen(int green) { return green << 8; }
public static int rgbBlue(int blue) { return blue; }
public enum Channel {
RED {
@Override