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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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*
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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
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import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.image.BandedSampleModel;
import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.WritableRaster;
import java.util.Objects;
import java.util.Vector;
/**
* @ test
* @ bug 8275345
* @ summary RasterFormatException when drawing a tiled image made of non - writable rasters .
*
* Test drawing a tiled image made of non - writable { @ link Raster } tiles .
* Drawing works when tiles are instances of { @ link WritableRaster } .
* But if tiles are instances of { @ link Raster } only , then the following
* exception is thrown :
*
* Exception in thread " main " java . awt . image . RasterFormatException : ( parentX + width ) is outside raster
* at java . desktop / java . awt . image . WritableRaster . createWritableChild ( WritableRaster . java : 228 )
* at java . desktop / sun . java2d . SunGraphics2D . drawTranslatedRenderedImage ( SunGraphics2D . java : 2852 )
* at java . desktop / sun . java2d . SunGraphics2D . drawRenderedImage ( SunGraphics2D . java : 2711 )
*
* The bug is demonstrated by drawing the same image twice :
* once with { @ link WritableRaster } tiles ( which succeed ) ,
* then the same operation but with { @ link Raster } tiles .
*
* The bug is caused by the following code in { @ code SunGraphics2D } :
*
* // Create a WritableRaster containing the tile
* WritableRaster wRaster = null ;
* if ( raster instanceof WritableRaster ) {
* wRaster = ( WritableRaster ) raster ;
* } else {
* // Create a WritableRaster in the same coordinate system
* // as the original raster.
* wRaster =
* Raster . createWritableRaster ( raster . getSampleModel ( ) ,
* raster . getDataBuffer ( ) ,
* null ) ;
* }
* // Translate wRaster to start at (0, 0) and to contain
* // only the relevant portion of the tile
* wRaster = wRaster . createWritableChild ( tileRect . x , tileRect . y ,
* tileRect . width ,
* tileRect . height ,
* 0 , 0 ,
* null ) ;
*
* If { @ code raster } is not an instance of { @ link WritableRaster } ,
* then a new { @ link WritableRaster } is created wrapping the same
* buffer < strong > but with a location of ( 0 , 0 ) < / strong > , because
* the { @ code location } argument of { @ code createWritableRaster }
* is null . Consequently the call to { @ code createWritableChild }
* shall not be done in that case , because the raster is already
* translated . The current code applies translation twice .
*
* This bug is largely unnoticed because most { @ code Raster . create }
* methods actually create { @ link WritableRaster } instances , even
* when the user did not asked for writable raster . To make this
* bug apparent , we need to invoke { @ code Raster . createRaster ( … ) }
* with a sample model for which no optimization is provided .
*/
public class TiledImage implements RenderedImage {
/**
* Run the test using writable tiles first , then read - only tiles .
*/
public static void main(String[] args) {
draw(true ); // Pass.
draw(false ); // Fail if 8275345 is not fixed.
}
private static final int NUM_X_TILES = 2 , NUM_Y_TILES = 3 ;
private static final int TILE_WIDTH = 16 , TILE_HEIGHT = 12 ;
/**
* Tests rendering a tiled image .
*
* @ param writable whether the image shall use writable raster .
*/
private static void draw(final boolean writable) {
final BufferedImage target = new BufferedImage(
TILE_WIDTH * NUM_X_TILES,
TILE_HEIGHT * NUM_Y_TILES,
BufferedImage.TYPE_BYTE_GRAY);
final RenderedImage source = new TiledImage(writable,
target.getColorModel());
Graphics2D g = target.createGraphics();
g.drawRenderedImage(source, new AffineTransform());
g.dispose();
}
private final ColorModel colorModel;
private final Raster[] tiles;
/**
* Creates a tiled image . The image is empty ,
* but pixel values are not the purpose of this test .
*
* @ param writable whether the image shall use writable raster .
*/
private TiledImage(boolean writable, ColorModel cm) {
/*
* We need a sample model class for which Raster . createRaster
* do not provide a special case . That method has optimizations
* for most SampleModel sub - types , except BandedSampleModel .
*/
SampleModel sm = new BandedSampleModel(DataBuffer.TYPE_BYTE, TILE_WIDTH, TILE_HEIGHT, 1 );
tiles = new Raster[NUM_X_TILES * NUM_Y_TILES];
final Point location = new Point();
for (int tileY = 0 ; tileY < NUM_Y_TILES; tileY++) {
for (int tileX = 0 ; tileX < NUM_X_TILES; tileX++) {
location.x = tileX * TILE_WIDTH;
location.y = tileY * TILE_HEIGHT;
DataBufferByte db = new DataBufferByte(TILE_WIDTH * TILE_HEIGHT);
Raster r;
if (writable) {
r = Raster.createWritableRaster(sm, db, location);
} else {
// Case causing RasterFormatException later.
r = Raster.createRaster(sm, db, location);
}
tiles[tileX + tileY * NUM_X_TILES] = r;
}
}
colorModel = cm;
}
@Override
public ColorModel getColorModel() {
return colorModel;
}
@Override
public SampleModel getSampleModel() {
return tiles[0 ].getSampleModel();
}
@Override
public Vector<RenderedImage> getSources() {
return new Vector<>();
}
@Override
public Object getProperty(String key) {
return Image.UndefinedProperty;
}
@Override
public String[] getPropertyNames() {
return null ;
}
@Override public int getMinX() {return 0 ;}
@Override public int getMinY() {return 0 ;}
@Override public int getMinTileX() {return 0 ;}
@Override public int getMinTileY() {return 0 ;}
@Override public int getTileGridXOffset() {return 0 ;}
@Override public int getTileGridYOffset() {return 0 ;}
@Override public int getNumXTiles() {return NUM_X_TILES;}
@Override public int getNumYTiles() {return NUM_Y_TILES;}
@Override public int getTileWidth() {return TILE_WIDTH;}
@Override public int getTileHeight() {return TILE_HEIGHT;}
@Override public int getWidth() {return TILE_WIDTH * NUM_X_TILES;}
@Override public int getHeight() {return TILE_HEIGHT * NUM_Y_TILES;}
@Override
public Raster getTile(final int tileX, final int tileY) {
Objects.checkIndex(tileX, NUM_X_TILES);
Objects.checkIndex(tileY, NUM_Y_TILES);
return tiles[tileX + tileY * NUM_X_TILES];
}
@Override
public Raster getData() {
throw new UnsupportedOperationException("Not needed for this test." );
}
@Override
public Raster getData(Rectangle rect) {
throw new UnsupportedOperationException("Not needed for this test." );
}
@Override
public WritableRaster copyData(WritableRaster raster) {
throw new UnsupportedOperationException("Not needed for this test." );
}
}
Messung V0.5 in Prozent C=93 H=87 G=89
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