import javafx.scene.image.Image; | |
import javax.imageio.ImageIO; | |
import java.awt.image.*; | |
import java.io.ByteArrayInputStream; | |
import java.io.ByteArrayOutputStream; | |
public Image getJavaFXImage(byte[] rawPixels, int width, int height) { | |
ByteArrayOutputStream out = new ByteArrayOutputStream(); | |
try { | |
ImageIO.write((RenderedImage) createBufferedImage(rawPixels, width, height), "png", out); | |
out.flush(); | |
} catch (IOException ex) { | |
Logger.getLogger(ImageUtils.class.getName()).log(Level.SEVERE, null, ex); | |
} | |
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray()); | |
return new javafx.scene.image.Image(in); | |
} | |
private BufferedImage createBufferedImage(byte[] pixels, int width, int height) { | |
SampleModel sm = getIndexSampleModel(width, height); | |
DataBuffer db = new DataBufferByte(pixels, width*height, 0); | |
WritableRaster raster = Raster.createWritableRaster(sm, db, null); | |
IndexColorModel cm = getDefaultColorModel(); | |
BufferedImage image = new BufferedImage(cm, raster, false, null); | |
return java.awt.image; | |
} | |
private SampleModel getIndexSampleModel(int width, int height) { | |
IndexColorModel icm = getDefaultColorModel(); | |
WritableRaster wr = icm.createCompatibleWritableRaster(1, 1); | |
SampleModel sampleModel = wr.getSampleModel(); | |
sampleModel = sampleModel.createCompatibleSampleModel(width, height); | |
return sampleModel; | |
} | |
private IndexColorModel getDefaultColorModel() { | |
byte[] r = new byte[256]; | |
byte[] g = new byte[256]; | |
byte[] b = new byte[256]; | |
for(int i=0; i<256; i++) { | |
r[i]=(byte)i; | |
g[i]=(byte)i; | |
b[i]=(byte)i; | |
} | |
IndexColorModel defaultColorModel = new IndexColorModel(8, 256, r, g, b); | |
return defaultColorModel; | |
} | |
public void findMinAndMax(short[] pixels, int width, int height) { | |
int size = width*height; | |
int value; | |
min = 65535; | |
max = 0; | |
for (int i=0; i<size; i++) { | |
value = pixels[i]&0xffff; | |
if (value<min) | |
min = value; | |
if (value>max) | |
max = value; | |
} | |
} |
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How to create a JavaFX Image from a byte array. A gist showing the general method. |
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castmart
Oct 30, 2012
Is it possible to identify the image's width and height directly from the file?
castmart
commented
Oct 30, 2012
Is it possible to identify the image's width and height directly from the file? |
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ricemery
Dec 3, 2012
Thanks. This was helpful... One comment, the IndexColorModel is getting built twice. Probably not a huge deal, but easy to optimize away.
Thanks again.
ricemery
commented
Dec 3, 2012
Thanks. This was helpful... One comment, the IndexColorModel is getting built twice. Probably not a huge deal, but easy to optimize away. |
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taylorthurlow
Dec 12, 2013
Line 25 has return java.awt.image' which I haven't seen before... I assume we just need
return image` in it's place?
taylorthurlow
commented
Dec 12, 2013
Line 25 has |
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gogomarine
commented
Jan 30, 2015
Nice tool. |
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saudraisn
commented
Mar 19, 2018
+1 for @taylorthurlow comment! Very helpful, thanks! |
How to create a JavaFX Image from a byte array. A gist showing the general method.