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#501: Fix for TYPE_USHORT_555/565_RGB, ColorModel now 16 bits

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(cherry picked from commit 42e17f20632ab55466687d2fb98e8f597e199aab)
This commit is contained in:
Harald Kuhr 2019-10-11 16:56:00 +02:00
parent 250c58cc2e
commit c087addb76
2 changed files with 49 additions and 13 deletions
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36
imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/util/ImageTypeSpecifiers.java
View File

@ -54,6 +54,28 @@ public final class ImageTypeSpecifiers {
private ImageTypeSpecifiers() {}
public static ImageTypeSpecifier createFromBufferedImageType(final int bufferedImageType) {
switch (bufferedImageType) {
// ImageTypeSpecifier unconditionally uses bits == 32, we'll use a workaround for the USHORT types
case BufferedImage.TYPE_USHORT_565_RGB:
return createPacked(ColorSpace.getInstance(ColorSpace.CS_sRGB),
0xF800,
0x07E0,
0x001F,
0x0,
DataBuffer.TYPE_USHORT,
false);
case BufferedImage.TYPE_USHORT_555_RGB:
return createPacked(ColorSpace.getInstance(ColorSpace.CS_sRGB),
0x7C00,
0x03E0,
0x001F,
0x0,
DataBuffer.TYPE_USHORT,
false);
default:
}
return ImageTypeSpecifier.createFromBufferedImageType(bufferedImageType);
}
@ -147,21 +169,21 @@ public final class ImageTypeSpecifiers {
int numEntries = 1 << bits;
byte[] arr = new byte[numEntries];
byte[] arg = new byte[numEntries];
byte[] arb = new byte[numEntries];
byte[] r = new byte[numEntries];
byte[] g = new byte[numEntries];
byte[] b = new byte[numEntries];
// Scale array values according to color profile..
for (int i = 0; i < numEntries; i++) {
float[] gray = new float[]{i / (float) (numEntries - 1)};
float[] rgb = colorSpace.toRGB(gray);
arr[i] = (byte) (rgb[0] * 255);
arg[i] = (byte) (rgb[1] * 255);
arb[i] = (byte) (rgb[2]* 255);
r[i] = (byte) (rgb[0] * 255);
g[i] = (byte) (rgb[1] * 255);
b[i] = (byte) (rgb[2] * 255);
}
ColorModel colorModel = new IndexColorModel(bits, numEntries, arr, arg, arb);
ColorModel colorModel = new IndexColorModel(bits, numEntries, r, g, b);
SampleModel sampleModel = new MultiPixelPackedSampleModel(dataType, 1, 1, bits);
return new ImageTypeSpecifier(colorModel, sampleModel);

24
imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageTypeSpecifiersTest.java
View File

@ -61,10 +61,21 @@ public class ImageTypeSpecifiersTest {
@Test
public void testCreateFromBufferedImageType() {
for (int type = BufferedImage.TYPE_INT_RGB; type < BufferedImage.TYPE_BYTE_INDEXED; type++) {
assertEquals(
ImageTypeSpecifier.createFromBufferedImageType(type),
ImageTypeSpecifiers.createFromBufferedImageType(type)
);
ImageTypeSpecifier expected;
switch (type) {
// Special handling for USHORT_565 and 555, due to bug in ImageTypeSpecifier for these types (DirectColorModel is 32 bits)
case BufferedImage.TYPE_USHORT_565_RGB:
expected = createPacked(sRGB, DCM_565_RED_MASK, DCM_565_GRN_MASK, DCM_565_BLU_MASK, 0, DataBuffer.TYPE_USHORT, false);
break;
case BufferedImage.TYPE_USHORT_555_RGB:
expected = createPacked(sRGB, DCM_555_RED_MASK, DCM_555_GRN_MASK, DCM_555_BLU_MASK, 0, DataBuffer.TYPE_USHORT, false);
break;
default:
expected = ImageTypeSpecifier.createFromBufferedImageType(type);
}
assertEquals(expected, ImageTypeSpecifiers.createFromBufferedImageType(type));
}
}
@ -531,6 +542,7 @@ public class ImageTypeSpecifiersTest {
@Test
public void testCreatePackedGrayscale1() {
// TODO: Fails on Java 11, because IndexColorModel now has an overloaded equals that actually tests the color entries
assertEquals(
ImageTypeSpecifier.createGrayscale(1, DataBuffer.TYPE_BYTE, false),
ImageTypeSpecifiers.createPackedGrayscale(GRAY, 1, DataBuffer.TYPE_BYTE)
@ -539,6 +551,7 @@ public class ImageTypeSpecifiersTest {
@Test
public void testCreatePackedGrayscale2() {
// TODO: Fails on Java 11, because IndexColorModel now has an overloaded equals that actually tests the color entries
assertEquals(
ImageTypeSpecifier.createGrayscale(2, DataBuffer.TYPE_BYTE, false),
ImageTypeSpecifiers.createPackedGrayscale(GRAY, 2, DataBuffer.TYPE_BYTE)
@ -546,7 +559,8 @@ public class ImageTypeSpecifiersTest {
}
@Test
public void testCreatePackedGrayscale4() {
public void testCreatePackedGrayscale4() throws Exception {
// TODO: Fails on Java 11, because IndexColorModel now has an overloaded equals that actually tests the color entries
assertEquals(
ImageTypeSpecifier.createGrayscale(4, DataBuffer.TYPE_BYTE, false),
ImageTypeSpecifiers.createPackedGrayscale(GRAY, 4, DataBuffer.TYPE_BYTE)