antville/helma
antville/helma
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a few bug fixes so that dithering now actually works.

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This commit is contained in:
lehni 2004-08-06 11:38:17 +00:00
parent 6398e21b3b
commit 23451becef
1 changed files with 5 additions and 7 deletions
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12
src/helma/image/DiffusionFilterOp.java
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@ -43,8 +43,6 @@ public class DiffusionFilterOp implements BufferedImageOp {
private boolean serpentine = true;
private int[] colorMap;
static private int ERROR_SHIFT = 10; // fixed point error precision
/**
* Construct a DiffusionFilter
*/
@ -143,10 +141,10 @@ public class DiffusionFilterOp implements BufferedImageOp {
int g2 = (rgb2 >> 8) & 0xff;
int b2 = rgb2 & 0xff;
int er = (r1 - r2) << ERROR_SHIFT;
int eg = (g1 - g2) << ERROR_SHIFT;
int eb = (b1 - b2) << ERROR_SHIFT;
int ea = (a1 - a2) << ERROR_SHIFT;
int er = r1 - r2;
int eg = g1 - g2;
int eb = b1 - b2;
int ea = a1 - a2;
for (int i = -1; i <= 1; i++) {
int iy = i + y;
@ -194,7 +192,7 @@ public class DiffusionFilterOp implements BufferedImageOp {
int idx = 0;
long dist = Long.MAX_VALUE;
for (int i = 0; i < colorMap.length; i++) {
int rgb2 = colorMap[idx];
int rgb2 = colorMap[i];
int a2 = (rgb2 >> 24) & 0xff;
int r2 = (rgb2 >> 16) & 0xff;
int g2 = (rgb2 >> 8) & 0xff;