[Bug awt/28369] New: BufferedImage.getRGB returns bad pixel data

[hendrich at informatik dot uni-hamburg dot de]

In some cases, BufferedImage.getRGB() returns pixel data in ABGR order
instead of ARGB order. 

Testcase attached; see the log below for some sample output (linux x86)
and the corresponding output from the reference implementation. jamvm
claims DirectColorModel both for the initial and the converted image,
but the pixel data is ABGR.

Note that the two-step approach (first loading via toolkit, then converting
to buffered image) is required because the RI returns a non-buffered image
from Toolkit.createImage(), and I need a BufferedImage to access the raw
pixels.

Using ImageIO.read() might be a better option, but ImageIO tended to be
very slow on classpath and extremely slow for certain images on the RI.





jamvm niffler.GetRGBTest images/screen-araucaria.gif 
Image is: address@hidden: type=0
java.awt.image.DirectColorModel[pixel_bits=32,
address@hidden, transferType=3, transparency=3,
hasAlpha=true, isAlphaPremultiplied=false, redMask=ff, greenMask=ff00,
blueMask=ff0000, alphaMask=ff000000] java.awt.image.WritableRaster[(0,0), 829 x
600,java.awt.image.SinglePixelPackedSampleModel[scanlineStride=829,
mask[0]=0xff, mask[1]=0xff00, mask[2]=0xff0000,
mask[3]=0xff000000],address@hidden
BufferedImage is: address@hidden: type=0
java.awt.image.DirectColorModel[pixel_bits=32,
address@hidden, transferType=3, transparency=3,
hasAlpha=true, isAlphaPremultiplied=false, redMask=ff, greenMask=ff00,
blueMask=ff0000, alphaMask=ff000000] java.awt.image.WritableRaster[(0,0), 829 x
600,java.awt.image.SinglePixelPackedSampleModel[scanlineStride=829,
mask[0]=0xff, mask[1]=0xff00, mask[2]=0xff0000,
mask[3]=0xff000000],address@hidden
RGB[0,0] = 255 100 50 180
RGB[27,13] = 255 156 102 52
RGB[599,828] = 255 252 253 251


java niffler.GetRGBTest images/screen-araucaria.gif 
Image is: address@hidden
-I- getBufferedImage took 43 msec.
BufferedImage is: address@hidden: type = 1 DirectColorModel: rmask=ff0000
gmask=ff00 bmask=ff amask=0 IntegerInterleavedRaster: width = 829 height = 600
#Bands = 3 xOff = 0 yOff = 0 dataOffset[0] 0
RGB[0,0] = 255 180 50 100
RGB[27,13] = 255 52 102 156
RGB[599,828] = 255 251 253 252


-- 
           Summary: BufferedImage.getRGB returns bad pixel data
           Product: classpath
           Version: 0.92
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: awt
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hendrich at informatik dot uni-hamburg dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28369