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#948: TIFF 64 bit FP support

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Harald Kuhr
2024-05-28 20:18:54 +02:00
parent 1e574ca429
commit 3e7ad05973
4 changed files with 112 additions and 28 deletions
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imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/util/IIOUtil.java
+21 -4
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@@ -40,7 +40,7 @@ import javax.imageio.spi.ServiceRegistry;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.*;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.InputStream;
@@ -283,7 +283,7 @@ public final class IIOUtil {
"bitsPerSample must be > 0 and <= 16 and a power of 2");
Validate.isTrue(samplesPerPixel > 0, "samplesPerPixel must be > 0");
Validate.isTrue(samplesPerPixel * bitsPerSample <= 16 || samplesPerPixel * bitsPerSample % 16 == 0,
"samplesPerPixel * bitsPerSample must be < 16 or a multiple of 16 ");
"samplesPerPixel * bitsPerSample must be < 16 or a multiple of 16");
int pixelStride = bitsPerSample * samplesPerPixel / 16;
for (int x = 0; x < srcWidth * pixelStride; x += samplePeriod * pixelStride) {
@@ -305,7 +305,7 @@ public final class IIOUtil {
"bitsPerSample must be > 0 and <= 32 and a power of 2");
Validate.isTrue(samplesPerPixel > 0, "samplesPerPixel must be > 0");
Validate.isTrue(samplesPerPixel * bitsPerSample <= 32 || samplesPerPixel * bitsPerSample % 32 == 0,
"samplesPerPixel * bitsPerSample must be < 32 or a multiple of 32 ");
"samplesPerPixel * bitsPerSample must be < 32 or a multiple of 32");
int pixelStride = bitsPerSample * samplesPerPixel / 32;
for (int x = 0; x < srcWidth * pixelStride; x += samplePeriod * pixelStride) {
@@ -322,7 +322,7 @@ public final class IIOUtil {
"bitsPerSample must be > 0 and <= 32 and a power of 2");
Validate.isTrue(samplesPerPixel > 0, "samplesPerPixel must be > 0");
Validate.isTrue(samplesPerPixel * bitsPerSample <= 32 || samplesPerPixel * bitsPerSample % 32 == 0,
"samplesPerPixel * bitsPerSample must be < 32 or a multiple of 32 ");
"samplesPerPixel * bitsPerSample must be < 32 or a multiple of 32");
int pixelStride = bitsPerSample * samplesPerPixel / 32;
for (int x = 0; x < srcWidth * pixelStride; x += samplePeriod * pixelStride) {
@@ -330,4 +330,21 @@ public final class IIOUtil {
System.arraycopy(srcRow, srcPos + x, destRow, destPos + x / samplePeriod, pixelStride);
}
}
public static void subsampleRow(double[] srcRow, int srcPos, int srcWidth,
double[] destRow, int destPos,
int samplesPerPixel, int bitsPerSample, int samplePeriod) {
Validate.isTrue(samplePeriod > 1, "samplePeriod must be > 1"); // Period == 1 could be a no-op...
Validate.isTrue(bitsPerSample > 0 && bitsPerSample <= 64 && (bitsPerSample == 1 || bitsPerSample % 2 == 0),
"bitsPerSample must be > 0 and <= 64 and a power of 2");
Validate.isTrue(samplesPerPixel > 0, "samplesPerPixel must be > 0");
Validate.isTrue(samplesPerPixel * bitsPerSample <= 64 || samplesPerPixel * bitsPerSample % 64 == 0,
"samplesPerPixel * bitsPerSample must be < 64 or a multiple of 64");
int pixelStride = bitsPerSample * samplesPerPixel / 64;
for (int x = 0; x < srcWidth * pixelStride; x += samplePeriod * pixelStride) {
// System.arraycopy should be intrinsic, but consider using direct array access for pixelStride == 1
System.arraycopy(srcRow, srcPos + x, destRow, destPos + x / samplePeriod, pixelStride);
}
}
}