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#577 Fix TGA subsampling + bonus metadata fix and palette conversion.

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This commit is contained in:
Harald Kuhr
2020-12-15 22:19:04 +01:00
parent 0da007ec8c
commit af1a6492d4
4 changed files with 51 additions and 7 deletions
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imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAHeader.java
+18 -4
View File
@@ -200,12 +200,12 @@ final class TGAHeader {
int components = colorMap.hasAlpha() ? 4 : 3;
byte[] cmap = new byte[rgb.length * components];
for (int i = 0; i < rgb.length; i++) {
cmap[i * components ] = (byte) ((rgb[i] >> 16) & 0xff);
cmap[i * components + 1] = (byte) ((rgb[i] >> 8) & 0xff);
cmap[i * components + 2] = (byte) ((rgb[i] ) & 0xff);
cmap[i * components ] = (byte) ((rgb[i] ) & 0xff); // B
cmap[i * components + 1] = (byte) ((rgb[i] >> 8) & 0xff); // G
cmap[i * components + 2] = (byte) ((rgb[i] >> 16) & 0xff); // R
if (components == 4) {
cmap[i * components + 3] = (byte) ((rgb[i] >>> 24) & 0xff);
cmap[i * components + 3] = (byte) ((rgb[i] >>> 24) & 0xff); // A
}
}
@@ -298,9 +298,23 @@ final class TGAHeader {
hasAlpha = false;
break;
case 24:
// BGR -> RGB
for (int i = 0; i < cmap.length; i += 3) {
byte b = cmap[i];
cmap[i ] = cmap[i + 2];
cmap[i + 2] = b;
}
hasAlpha = false;
break;
case 32:
// BGRA -> RGBA
for (int i = 0; i < cmap.length; i += 4) {
byte b = cmap[i];
cmap[i ] = cmap[i + 2];
cmap[i + 2] = b;
}
hasAlpha = true;
break;
default:
imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAImageReader.java
+5 -3
View File
@@ -224,7 +224,7 @@ final class TGAImageReader extends ImageReaderBase {
byte[] rowDataByte, WritableRaster destChannel, Raster srcChannel, int y) throws IOException {
// If subsampled or outside source region, skip entire row
if (y % ySub != 0 || height - 1 - y < srcRegion.y || height - 1 - y >= srcRegion.y + srcRegion.height) {
imageInput.skipBytes(rowDataByte.length);
input.skipBytes(rowDataByte.length);
return;
}
@@ -251,7 +251,8 @@ final class TGAImageReader extends ImageReaderBase {
destChannel.setDataElements(0, dstY, srcChannel);
break;
case TGA.ORIGIN_UPPER_LEFT:
destChannel.setDataElements(0, y, srcChannel);
dstY = y / ySub;
destChannel.setDataElements(0, dstY, srcChannel);
break;
default:
throw new IIOException("Unsupported origin: " + origin);
@@ -289,7 +290,8 @@ final class TGAImageReader extends ImageReaderBase {
destChannel.setDataElements(0, dstY, srcChannel);
break;
case TGA.ORIGIN_UPPER_LEFT:
destChannel.setDataElements(0, y, srcChannel);
dstY = y / ySub;
destChannel.setDataElements(0, dstY, srcChannel);
break;
default:
throw new IIOException("Unsupported origin: " + origin);
imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAMetadata.java
+1
View File
@@ -189,6 +189,7 @@ final class TGAMetadata extends AbstractMetadata {
switch (header.getPixelDepth()) {
case 8:
bitsPerSample.setAttribute("value", createListValue(1, Integer.toString(header.getPixelDepth())));
break;
case 16:
if (header.getAttributeBits() > 0 && extensions != null && extensions.hasAlpha()) {
bitsPerSample.setAttribute("value", "5, 5, 5, 1");