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WebP cleanup.

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This commit is contained in:
Harald Kuhr 2023-03-18 11:40:47 +01:00
parent 1794e336de
commit eabb8fd02b
1 changed files with 33 additions and 33 deletions
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66
imageio/imageio-webp/src/main/java/com/twelvemonkeys/imageio/plugins/webp/lossless/VP8LDecoder.java
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@ -117,7 +117,7 @@ public final class VP8LDecoder {
if (topLevel) {
Rectangle bounds = new Rectangle(width, height);
fullSizeRaster = getRasterForDecoding(raster, param, bounds);
fullSizeRaster = createDecodeRaster(raster, param, bounds);
// If multiple indices packed into one pixel xSize is different from raster width
decodeRaster = fullSizeRaster.createWritableChild(0, 0, xSize, height, 0, 0, null);
@ -134,11 +134,41 @@ public final class VP8LDecoder {
transform.applyInverse(fullSizeRaster);
}
if (fullSizeRaster != raster && param != null) {
if (fullSizeRaster != raster) {
copyIntoRasterWithParams(fullSizeRaster, raster, param);
}
}
private WritableRaster createDecodeRaster(WritableRaster raster, ImageReadParam param, Rectangle bounds) {
// If the ImageReadParam requires only a subregion of the image, and if the whole image does not fit into the
// Raster or subsampling is requested, we need a temporary Raster as we can only decode the whole image at once
boolean originSet = false;
if (param != null) {
if (param.getSourceRegion() != null && !param.getSourceRegion().contains(bounds) ||
param.getSourceXSubsampling() != 1 || param.getSourceYSubsampling() != 1) {
// Can't reuse existing
return Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, bounds.width, bounds.height,
4 * bounds.width, 4, new int[] {0, 1, 2, 3}, null);
}
else {
bounds.setLocation(param.getDestinationOffset());
originSet = true;
}
}
if (!raster.getBounds().contains(bounds)) {
// Can't reuse existing
return Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, bounds.width, bounds.height, 4 * bounds.width,
4, new int[] {0, 1, 2, 3}, null);
}
return originSet ?
// Recenter to (0, 0)
raster.createWritableChild(bounds.x, bounds.y, bounds.width, bounds.height, 0, 0, null) :
raster;
}
/**
* Copy a source raster into a destination raster with optional settings applied.
*/
@ -169,36 +199,6 @@ public final class VP8LDecoder {
}
}
private WritableRaster getRasterForDecoding(WritableRaster raster, ImageReadParam param, Rectangle bounds) {
// If the ImageReadParam requires only a subregion of the image, and if the whole image does not fit into the
// Raster or subsampling is requested, we need a temporary Raster as we can only decode the whole image at once
boolean originSet = false;
if (param != null) {
if (param.getSourceRegion() != null && !param.getSourceRegion().contains(bounds) ||
param.getSourceXSubsampling() != 1 || param.getSourceYSubsampling() != 1) {
// Can't reuse existing
return Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, bounds.width, bounds.height,
4 * bounds.width, 4, new int[] {0, 1, 2, 3}, null);
}
else {
bounds.setLocation(param.getDestinationOffset());
originSet = true;
}
}
if (!raster.getBounds().contains(bounds)) {
// Can't reuse existing
return Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, bounds.width, bounds.height, 4 * bounds.width,
4, new int[] {0, 1, 2, 3}, null);
}
return originSet ?
// Recenter to (0, 0)
raster.createWritableChild(bounds.x, bounds.y, bounds.width, bounds.height, 0, 0, null) :
raster;
}
private void decodeImage(WritableRaster raster, HuffmanInfo huffmanInfo, ColorCache colorCache) throws IOException {
int width = raster.getWidth();
int height = raster.getHeight();