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fix srgb alpha, tune values

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Moritz Zwerger 2023-12-16 01:21:27 +01:00
parent 7a74bf432a
commit 5877050837
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1 changed files with 4 additions and 4 deletions
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src/main/java/example/jonathan2520/SRGBAverager.java
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@ -19,12 +19,12 @@ package example.jonathan2520;
public class SRGBAverager { public class SRGBAverager {
private static final SRGBTable SRGB = new SRGBTable(); private static final SRGBTable SRGB = new SRGBTable();
private static final float ALPHA_THRESHOLD = 0.6f; private static final float ALPHA_THRESHOLD = 0.5f;
private static final int ALPHA_THRESHOLD_INT = (int) (0xFF * ALPHA_THRESHOLD); private static final int ALPHA_THRESHOLD_INT = (int) (0xFF * ALPHA_THRESHOLD);
public static int average(int c0, int c1, int c2, int c3) { public static int average(int c0, int c1, int c2, int c3) {
if ((((c0 | c1 | c2 | c3) ^ (c0 & c1 & c2 & c3)) & 0xff000000) == 0) { if ((((c0 | c1 | c2 | c3) ^ (c0 & c1 & c2 & c3)) & 0x000000ff) == 0) {
// Alpha values are all equal. Simplifies computation somewhat. It's // Alpha values are all equal. Simplifies computation somewhat. It's
// also a reasonable fallback when all alpha values are zero, in // also a reasonable fallback when all alpha values are zero, in
// which case the resulting color would normally be undefined. // which case the resulting color would normally be undefined.
@ -68,8 +68,8 @@ public class SRGBAverager {
int ai = (int) (0.25F * a + 0.5F); int ai = (int) (0.25F * a + 0.5F);
// check if opaque and transparent are mixed, if so check if target alpha is above specific threshold to keep it // check if opaque and transparent are mixed, if so check if target alpha is above specific threshold to keep it
if ((a == 0) && (a0 == 0xff || a1 == 0xff || a2 == 0xff || a3 == 0xff)) { if ((a == 0) || (a0 == 0xff || a1 == 0xff || a2 == 0xff || a3 == 0xff)) {
if (a1 < ALPHA_THRESHOLD_INT) { if (ai < ALPHA_THRESHOLD_INT) {
return 0; return 0;
} }
ai = 0xff; ai = 0xff;