(x1, y1) and (x2, y2)
* in this graphics context's coordinate system.
* @param x1 the first point's x coordinate.
* @param y1 the first point's y coordinate.
* @param x2 the second point's x coordinate.
* @param y2 the second point's y coordinate.
*/
public void drawLine(int x1, int y1, int x2, int y2) {
Paint paint = getPaint();
try {
AffineTransform deviceTransform = getTransform();
if (getClip() != null) {
deviceClip(getClip().getPathIterator(deviceTransform));
}
deviceDrawLine(x1, y1, x2, y2, (Color) paint);
} catch (ClassCastException e) {
throw new IllegalArgumentException("Expected a Color instance");
}
}
/**
* Draws the outline of the specified rectangle.
* The left and right edges of the rectangle are at
* x and x + width.
* The top and bottom edges are at
* y and y + height.
* The rectangle is drawn using the graphics context's current color.
* @param x the x coordinate
* of the rectangle to be drawn.
* @param y the y coordinate
* of the rectangle to be drawn.
* @param width the width of the rectangle to be drawn.
* @param height the height of the rectangle to be drawn.
* @see java.awt.Graphics#fillRect
* @see java.awt.Graphics#clearRect
*/
public void drawRect(int x, int y, int width, int height) {
Paint paint = getPaint();
try {
AffineTransform deviceTransform = getTransform();
if (getClip() != null) {
deviceClip(getClip().getPathIterator(deviceTransform));
}
deviceFrameRect(x, y, width, height, (Color) paint);
} catch (ClassCastException e) {
throw new IllegalArgumentException("Expected a Color instance");
}
}
/**
* Fills the specified rectangle.
* The left and right edges of the rectangle are at
* x and x + width - 1.
* The top and bottom edges are at
* y and y + height - 1.
* The resulting rectangle covers an area
* width pixels wide by
* height pixels tall.
* The rectangle is filled using the graphics context's current color.
* @param x the x coordinate
* of the rectangle to be filled.
* @param y the y coordinate
* of the rectangle to be filled.
* @param width the width of the rectangle to be filled.
* @param height the height of the rectangle to be filled.
* @see java.awt.Graphics#clearRect
* @see java.awt.Graphics#drawRect
*/
public void fillRect(int x, int y, int width, int height){
Paint paint = getPaint();
try {
AffineTransform deviceTransform = getTransform();
if (getClip() != null) {
deviceClip(getClip().getPathIterator(deviceTransform));
}
deviceFillRect(x, y, width, height, (Color) paint);
} catch (ClassCastException e) {
throw new IllegalArgumentException("Expected a Color instance");
}
}
/**
* Clears the specified rectangle by filling it with the background
* color of the current drawing surface. This operation does not
* use the current paint mode.
*
* Beginning with Java 1.1, the background color
* of offscreen images may be system dependent. Applications should
* use setColor followed by fillRect to
* ensure that an offscreen image is cleared to a specific color.
* @param x the x coordinate of the rectangle to clear.
* @param y the y coordinate of the rectangle to clear.
* @param width the width of the rectangle to clear.
* @param height the height of the rectangle to clear.
* @see java.awt.Graphics#fillRect(int, int, int, int)
* @see java.awt.Graphics#drawRect
* @see java.awt.Graphics#setColor(java.awt.Color)
* @see java.awt.Graphics#setPaintMode
* @see java.awt.Graphics#setXORMode(java.awt.Color)
*/
public void clearRect(int x, int y, int width, int height) {
fill(new Rectangle2D.Float(x, y, width, height), getBackground());
}
/**
* Draws an outlined round-cornered rectangle using this graphics
* context's current color. The left and right edges of the rectangle
* are at x and x + width,
* respectively. The top and bottom edges of the rectangle are at
* y and y + height.
* @param x the x coordinate of the rectangle to be drawn.
* @param y the y coordinate of the rectangle to be drawn.
* @param width the width of the rectangle to be drawn.
* @param height the height of the rectangle to be drawn.
* @param arcWidth the horizontal diameter of the arc
* at the four corners.
* @param arcHeight the vertical diameter of the arc
* at the four corners.
* @see java.awt.Graphics#fillRoundRect
*/
public void drawRoundRect(int x, int y, int width, int height,
int arcWidth, int arcHeight) {
draw(new RoundRectangle2D.Float(x, y,
width, height,
arcWidth, arcHeight));
}
/**
* Fills the specified rounded corner rectangle with the current color.
* The left and right edges of the rectangle
* are at x and x + width - 1,
* respectively. The top and bottom edges of the rectangle are at
* y and y + height - 1.
* @param x the x coordinate of the rectangle to be filled.
* @param y the y coordinate of the rectangle to be filled.
* @param width the width of the rectangle to be filled.
* @param height the height of the rectangle to be filled.
* @param arcWidth the horizontal diameter
* of the arc at the four corners.
* @param arcHeight the vertical diameter
* of the arc at the four corners.
* @see java.awt.Graphics#drawRoundRect
*/
public void fillRoundRect(int x, int y, int width, int height,
int arcWidth, int arcHeight) {
fill(new RoundRectangle2D.Float(x, y,
width, height,
arcWidth, arcHeight));
}
/**
* Draws the outline of an oval.
* The result is a circle or ellipse that fits within the
* rectangle specified by the x, y,
* width, and height arguments.
*
* The oval covers an area that is
* width + 1 pixels wide
* and height + 1 pixels tall.
* @param x the x coordinate of the upper left
* corner of the oval to be drawn.
* @param y the y coordinate of the upper left
* corner of the oval to be drawn.
* @param width the width of the oval to be drawn.
* @param height the height of the oval to be drawn.
* @see java.awt.Graphics#fillOval
* @since JDK1.0
*/
public void drawOval(int x, int y, int width, int height) {
draw(new Ellipse2D.Float(x, y, width, height));
}
/**
* Fills an oval bounded by the specified rectangle with the
* current color.
* @param x the x coordinate of the upper left corner
* of the oval to be filled.
* @param y the y coordinate of the upper left corner
* of the oval to be filled.
* @param width the width of the oval to be filled.
* @param height the height of the oval to be filled.
* @see java.awt.Graphics#drawOval
*/
public void fillOval(int x, int y, int width, int height){
fill(new Ellipse2D.Float(x, y, width, height));
}
/**
* Draws the outline of a circular or elliptical arc
* covering the specified rectangle.
*
* The resulting arc begins at startAngle and extends
* for arcAngle degrees, using the current color.
* Angles are interpreted such that 0 degrees
* is at the 3 o'clock position.
* A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
*
* The center of the arc is the center of the rectangle whose origin
* is (x, y) and whose size is specified by the
* width and height arguments.
*
* The resulting arc covers an area
* width + 1 pixels wide
* by height + 1 pixels tall.
*
* The angles are specified relative to the non-square extents of * the bounding rectangle such that 45 degrees always falls on the * line from the center of the ellipse to the upper right corner of * the bounding rectangle. As a result, if the bounding rectangle is * noticeably longer in one axis than the other, the angles to the * start and end of the arc segment will be skewed farther along the * longer axis of the bounds. * @param x the x coordinate of the * upper-left corner of the arc to be drawn. * @param y the y coordinate of the * upper-left corner of the arc to be drawn. * @param width the width of the arc to be drawn. * @param height the height of the arc to be drawn. * @param startAngle the beginning angle. * @param arcAngle the angular extent of the arc, * relative to the start angle. * @see java.awt.Graphics#fillArc */ public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) { draw(new Arc2D.Float(x, y, width, height, startAngle, arcAngle, Arc2D.OPEN)); } /** * Fills a circular or elliptical arc covering the specified rectangle. *
* The resulting arc begins at startAngle and extends
* for arcAngle degrees.
* Angles are interpreted such that 0 degrees
* is at the 3 o'clock position.
* A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
*
* The center of the arc is the center of the rectangle whose origin
* is (x, y) and whose size is specified by the
* width and height arguments.
*
* The resulting arc covers an area
* width + 1 pixels wide
* by height + 1 pixels tall.
*
* The angles are specified relative to the non-square extents of * the bounding rectangle such that 45 degrees always falls on the * line from the center of the ellipse to the upper right corner of * the bounding rectangle. As a result, if the bounding rectangle is * noticeably longer in one axis than the other, the angles to the * start and end of the arc segment will be skewed farther along the * longer axis of the bounds. * @param x the x coordinate of the * upper-left corner of the arc to be filled. * @param y the y coordinate of the * upper-left corner of the arc to be filled. * @param width the width of the arc to be filled. * @param height the height of the arc to be filled. * @param startAngle the beginning angle. * @param arcAngle the angular extent of the arc, * relative to the start angle. * @see java.awt.Graphics#drawArc */ public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) { fill(new Arc2D.Float(x, y, width, height, startAngle, arcAngle, Arc2D.PIE)); } /** * Draws a sequence of connected lines defined by * arrays of x and y coordinates. * Each pair of (x, y) coordinates defines a point. * The figure is not closed if the first point * differs from the last point. * @param xPoints an array of x points * @param yPoints an array of y points * @param nPoints the total number of points * @see java.awt.Graphics#drawPolygon(int[], int[], int) * @since JDK1.1 */ public void drawPolyline(int xPoints[], int yPoints[], int nPoints) { float fromX; float fromY; float toX; float toY; if (nPoints > 0) { fromX = xPoints[0]; fromY = yPoints[0]; for(int i = 1; i < nPoints; i++) { toX = xPoints[i]; toY = yPoints[i]; draw(new Line2D.Float(fromX, fromY, toX, toY)); fromX = toX; fromY = toY; } } } /** * Draws a closed polygon defined by * arrays of x and y coordinates. * Each pair of (x, y) coordinates defines a point. *
* This method draws the polygon defined by nPoint line
* segments, where the first nPoint - 1
* line segments are line segments from
* (xPoints[i - 1], yPoints[i - 1])
* to (xPoints[i], yPoints[i]), for
* 1 ≤ i ≤ nPoints.
* The figure is automatically closed by drawing a line connecting
* the final point to the first point, if those points are different.
* @param xPoints a an array of x coordinates.
* @param yPoints a an array of y coordinates.
* @param nPoints a the total number of points.
* @see java.awt.Graphics#fillPolygon
* @see java.awt.Graphics#drawPolyline
*/
public void drawPolygon(int xPoints[], int yPoints[],
int nPoints) {
draw(new Polygon(xPoints, yPoints, nPoints));
}
/**
* Draws the outline of a polygon defined by the specified
* Polygon object.
* @param p the polygon to draw.
* @see java.awt.Graphics#fillPolygon
* @see java.awt.Graphics#drawPolyline
*/
public void drawPolygon(Polygon p) {
draw(p);
}
/**
* Fills a closed polygon defined by
* arrays of x and y coordinates.
*
* This method draws the polygon defined by nPoint line
* segments, where the first nPoint - 1
* line segments are line segments from
* (xPoints[i - 1], yPoints[i - 1])
* to (xPoints[i], yPoints[i]), for
* 1 ≤ i ≤ nPoints.
* The figure is automatically closed by drawing a line connecting
* the final point to the first point, if those points are different.
*
* The area inside the polygon is defined using an
* even-odd fill rule, also known as the alternating rule.
* @param xPoints a an array of x coordinates.
* @param yPoints a an array of y coordinates.
* @param nPoints a the total number of points.
* @see java.awt.Graphics#drawPolygon(int[], int[], int)
*/
public void fillPolygon(int xPoints[], int yPoints[],
int nPoints) {
fill(new Polygon(xPoints, yPoints, nPoints));
}
/**
* Fills the polygon defined by the specified Polygon object with
* the graphics context's current color.
*
* The area inside the polygon is defined using an
* even-odd fill rule, also known as the alternating rule.
* @param p the polygon to fill.
* @see java.awt.Graphics#drawPolygon(int[], int[], int)
*/
public void fillPolygon(Polygon p) {
fill(p);
}
/**
* Draws the text given by the specified string, using this
* graphics context's current font and color. The baseline of the
* first character is at position (x, y) in this
* graphics context's coordinate system.
* @param str the string to be drawn.
* @param x the x coordinate.
* @param y the y coordinate.
* @see java.awt.Graphics#drawBytes
* @see java.awt.Graphics#drawChars
* @since JDK1.0
*/
public void drawString(String str, int x, int y) {
drawString(str, (float) x, (float) y);
}
public void drawString(String str, float x, float y) {
if (str.length() == 0) {
return;
}
TextLayout layout =
new TextLayout(str, getFont(), getFontRenderContext());
layout.draw(this, x, y);
}
protected void drawString(String str, float x, float y,
Font font, FontRenderContext frc, float w) {
TextLayout layout =
new TextLayout(str, font, frc);
Shape textShape =
layout.getOutline(AffineTransform.getTranslateInstance(x, y));
fill(textShape);
}
/**
* Draws the text given by the specified iterator, using this
* graphics context's current color. The iterator has to specify a font
* for each character. The baseline of the
* first character is at position (x, y) in this
* graphics context's coordinate system.
* @param iterator the iterator whose text is to be drawn
* @param x the x coordinate.
* @param y the y coordinate.
* @see java.awt.Graphics#drawBytes
* @see java.awt.Graphics#drawChars
*/
public void drawString(AttributedCharacterIterator iterator,
int x, int y) {
drawString(iterator, (float) x, (float) y);
}
public void drawString(AttributedCharacterIterator iterator,
float x, float y) {
if (iterator == null) {
throw
new NullPointerException("attributedcharacteriterator is null");
}
TextLayout layout =
new TextLayout(iterator, getFontRenderContext());
layout.draw(this, x, y);
}
/**
* Draws a GlyphVector.
* The rendering attributes applied include the clip, transform,
* paint or color, and composite attributes. The GlyphVector specifies
* individual glyphs from a Font.
* @param g The GlyphVector to be drawn.
* @param x,y The coordinates where the glyphs should be drawn.
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawGlyphVector(GlyphVector g,
float x,
float y) {
/* We should not reach here if printingGlyphVector is already true.
* Add an assert so this can be tested if need be.
* But also ensure that we do at least render properly by filling
* the outline.
*/
if (printingGlyphVector) {
assert !printingGlyphVector; // ie false.
fill(g.getOutline(x, y));
return;
}
try {
printingGlyphVector = true;
if (RasterPrinterJob.shapeTextProp ||
!printedSimpleGlyphVector(g, x, y)) {
fill(g.getOutline(x, y));
}
} finally {
printingGlyphVector = false;
}
}
protected static SoftReference
* This method returns immediately in all cases, even if the
* complete image has not yet been loaded, and it has not been dithered
* and converted for the current output device.
*
* If the image has not yet been completely loaded, then
*
* The image is drawn inside the specified rectangle of this
* graphics context's coordinate space, and is scaled if
* necessary. Transparent pixels do not affect whatever pixels
* are already there.
*
* This method returns immediately in all cases, even if the
* entire image has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete, then
*
* A scaled version of an image will not necessarily be
* available immediately just because an unscaled version of the
* image has been constructed for this output device. Each size of
* the image may be cached separately and generated from the original
* data in a separate image production sequence.
* @param img the specified image to be drawn.
* @param x the x coordinate.
* @param y the y coordinate.
* @param width the width of the rectangle.
* @param height the height of the rectangle.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
int width, int height,
ImageObserver observer) {
return drawImage(img, x, y, width, height, null, observer);
}
/*
* Draws as much of the specified image as is currently available.
* The image is drawn with its top-left corner at
* (x, y) in this graphics context's coordinate
* space. Transparent pixels are drawn in the specified
* background color.
*
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
*
* This method returns immediately in all cases, even if the
* complete image has not yet been loaded, and it has not been dithered
* and converted for the current output device.
*
* If the image has not yet been completely loaded, then
*
* The image is drawn inside the specified rectangle of this
* graphics context's coordinate space, and is scaled if
* necessary. Transparent pixels are drawn in the specified
* background color.
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
*
* This method returns immediately in all cases, even if the
* entire image has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
*
* A scaled version of an image will not necessarily be
* available immediately just because an unscaled version of the
* image has been constructed for this output device. Each size of
* the image may be cached separately and generated from the original
* data in a separate image production sequence.
* @param img the specified image to be drawn.
* This method does nothing if
* This method returns immediately in all cases, even if the
* image area to be drawn has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
*
* This method always uses the unscaled version of the image
* to render the scaled rectangle and performs the required
* scaling on the fly. It does not use a cached, scaled version
* of the image for this operation. Scaling of the image from source
* to destination is performed such that the first coordinate
* of the source rectangle is mapped to the first coordinate of
* the destination rectangle, and the second source coordinate is
* mapped to the second destination coordinate. The subimage is
* scaled and flipped as needed to preserve those mappings.
* @param img the specified image to be drawn
* @param dx1 the x coordinate of the first corner of the
* destination rectangle.
* @param dy1 the y coordinate of the first corner of the
* destination rectangle.
* @param dx2 the x coordinate of the second corner of the
* destination rectangle.
* @param dy2 the y coordinate of the second corner of the
* destination rectangle.
* @param sx1 the x coordinate of the first corner of the
* source rectangle.
* @param sy1 the y coordinate of the first corner of the
* source rectangle.
* @param sx2 the x coordinate of the second corner of the
* source rectangle.
* @param sy2 the y coordinate of the second corner of the
* source rectangle.
* @param observer object to be notified as more of the image is
* scaled and converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.1
*/
public boolean drawImage(Image img,
int dx1, int dy1, int dx2, int dy2,
int sx1, int sy1, int sx2, int sy2,
ImageObserver observer) {
return drawImage(img,
dx1, dy1, dx2, dy2,
sx1, sy1, sx2, sy2,
null, observer);
}
/**
* Draws as much of the specified area of the specified image as is
* currently available, scaling it on the fly to fit inside the
* specified area of the destination drawable surface.
*
* Transparent pixels are drawn in the specified background color.
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
*
* This method returns immediately in all cases, even if the
* image area to be drawn has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
*
* This method always uses the unscaled version of the image
* to render the scaled rectangle and performs the required
* scaling on the fly. It does not use a cached, scaled version
* of the image for this operation. Scaling of the image from source
* to destination is performed such that the first coordinate
* of the source rectangle is mapped to the first coordinate of
* the destination rectangle, and the second source coordinate is
* mapped to the second destination coordinate. The subimage is
* scaled and flipped as needed to preserve those mappings.
* @param img the specified image to be drawn
* This method does nothing if pathIter
* with the specified color.
* The path is provided in device coordinates.
*/
protected abstract void deviceFill(PathIterator pathIter, Color color);
/*
* Set the clipping path to that defined by
* the passed in PathIterator.
*/
protected abstract void deviceClip(PathIterator pathIter);
/*
* Draw the outline of the rectangle without using path
* if supported by platform.
*/
protected abstract void deviceFrameRect(int x, int y,
int width, int height,
Color color);
/*
* Draw a line without using path if supported by platform.
*/
protected abstract void deviceDrawLine(int xBegin, int yBegin,
int xEnd, int yEnd, Color color);
/*
* Fill a rectangle using specified color.
*/
protected abstract void deviceFillRect(int x, int y,
int width, int height, Color color);
/* Obtain a BI from known implementations of java.awt.Image
*/
protected BufferedImage getBufferedImage(Image img) {
if (img instanceof BufferedImage) {
// Otherwise we expect a BufferedImage to behave as a standard BI
return (BufferedImage)img;
} else if (img instanceof ToolkitImage) {
// This can be null if the image isn't loaded yet.
// This is fine as in that case our caller will return
// as it will only draw a fully loaded image
return ((ToolkitImage)img).getBufferedImage();
} else if (img instanceof VolatileImage) {
// VI needs to make a new BI: this is unavoidable but
// I don't expect VI's to be "huge" in any case.
return ((VolatileImage)img).getSnapshot();
} else {
// may be null or may be some non-standard Image which
// shouldn't happen as Image is implemented by the platform
// not by applications
// If you add a new Image implementation to the platform you
// will need to support it here similarly to VI.
return null;
}
}
/**
* Return true if the BufferedImage argument has non-opaque
* bits in it and therefore can not be directly rendered by
* GDI. Return false if the image is opaque. If this function
* can not tell for sure whether the image has transparent
* pixels then it assumes that it does.
*/
protected boolean hasTransparentPixels(BufferedImage bufferedImage) {
ColorModel colorModel = bufferedImage.getColorModel();
boolean hasTransparency = colorModel == null
? true
: colorModel.getTransparency() != ColorModel.OPAQUE;
/*
* For the default INT ARGB check the image to see if any pixels are
* really transparent. If there are no transparent pixels then the
* transparency of the color model can be ignored.
* We assume that IndexColorModel images have already been
* checked for transparency and will be OPAQUE unless they actually
* have transparent pixels present.
*/
if (hasTransparency && bufferedImage != null) {
if (bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB ||
bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB_PRE) {
DataBuffer db = bufferedImage.getRaster().getDataBuffer();
SampleModel sm = bufferedImage.getRaster().getSampleModel();
if (db instanceof DataBufferInt &&
sm instanceof SinglePixelPackedSampleModel) {
SinglePixelPackedSampleModel psm =
(SinglePixelPackedSampleModel)sm;
// Stealing the data array for reading only...
int[] int_data =
SunWritableRaster.stealData((DataBufferInt) db, 0);
int x = bufferedImage.getMinX();
int y = bufferedImage.getMinY();
int w = bufferedImage.getWidth();
int h = bufferedImage.getHeight();
int stride = psm.getScanlineStride();
boolean hastranspixel = false;
for (int j = y; j < y+h; j++) {
int yoff = j * stride;
for (int i = x; i < x+w; i++) {
if ((int_data[yoff+i] & 0xff000000)!=0xff000000 ) {
hastranspixel = true;
break;
}
}
if (hastranspixel) {
break;
}
}
if (hastranspixel == false) {
hasTransparency = false;
}
}
}
}
return hasTransparency;
}
protected boolean isBitmaskTransparency(BufferedImage bufferedImage) {
ColorModel colorModel = bufferedImage.getColorModel();
return (colorModel != null &&
colorModel.getTransparency() == ColorModel.BITMASK);
}
/* An optimisation for the special case of ICM images which have
* bitmask transparency.
*/
protected boolean drawBitmaskImage(BufferedImage bufferedImage,
AffineTransform xform,
Color bgcolor,
int srcX, int srcY,
int srcWidth, int srcHeight) {
ColorModel colorModel = bufferedImage.getColorModel();
IndexColorModel icm;
int [] pixels;
if (!(colorModel instanceof IndexColorModel)) {
return false;
} else {
icm = (IndexColorModel)colorModel;
}
if (colorModel.getTransparency() != ColorModel.BITMASK) {
return false;
}
// to be compatible with 1.1 printing which treated b/g colors
// with alpha 128 as opaque
if (bgcolor != null && bgcolor.getAlpha() < 128) {
return false;
}
if ((xform.getType()
& ~( AffineTransform.TYPE_UNIFORM_SCALE
| AffineTransform.TYPE_TRANSLATION
| AffineTransform.TYPE_QUADRANT_ROTATION
)) != 0) {
return false;
}
if ((getTransform().getType()
& ~( AffineTransform.TYPE_UNIFORM_SCALE
| AffineTransform.TYPE_TRANSLATION
| AffineTransform.TYPE_QUADRANT_ROTATION
)) != 0) {
return false;
}
BufferedImage subImage = null;
Raster raster = bufferedImage.getRaster();
int transpixel = icm.getTransparentPixel();
byte[] alphas = new byte[icm.getMapSize()];
icm.getAlphas(alphas);
if (transpixel >= 0) {
alphas[transpixel] = 0;
}
/* don't just use srcWidth & srcHeight from application - they
* may exceed the extent of the image - may need to clip.
* The image xform will ensure that points are still mapped properly.
*/
int rw = raster.getWidth();
int rh = raster.getHeight();
if (srcX > rw || srcY > rh) {
return false;
}
int right, bottom, wid, hgt;
if (srcX+srcWidth > rw) {
right = rw;
wid = right - srcX;
} else {
right = srcX+srcWidth;
wid = srcWidth;
}
if (srcY+srcHeight > rh) {
bottom = rh;
hgt = bottom - srcY;
} else {
bottom = srcY+srcHeight;
hgt = srcHeight;
}
pixels = new int[wid];
for (int j=srcY; jdrawImage() methods for
* PathGraphics are all decomposed
* into an invocation of drawImageToPlatform.
* The portion of the passed in image defined by
* srcX, srcY, srcWidth, and srcHeight
* is transformed by the supplied AffineTransform and
* drawn using PS to the printer context.
*
* @param img The image to be drawn.
* This method does nothing if img is null.
* @param xform Used to tranform the image before drawing.
* This can be null.
* @param bgcolor This color is drawn where the image has transparent
* pixels. If this parameter is null then the
* pixels already in the destination should show
* through.
* @param srcX With srcY this defines the upper-left corner
* of the portion of the image to be drawn.
*
* @param srcY With srcX this defines the upper-left corner
* of the portion of the image to be drawn.
* @param srcWidth The width of the portion of the image to
* be drawn.
* @param srcHeight The height of the portion of the image to
* be drawn.
* @param handlingTransparency if being recursively called to
* print opaque region of transparent image
*/
protected abstract boolean
drawImageToPlatform(Image img, AffineTransform xform,
Color bgcolor,
int srcX, int srcY,
int srcWidth, int srcHeight,
boolean handlingTransparency);
/**
* Draws as much of the specified image as is currently available.
* The image is drawn with its top-left corner at
* (x, y) in this graphics context's coordinate
* space. Transparent pixels in the image do not affect whatever
* pixels are already there.
* drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* @param img the specified image to be drawn.
* @param x the x coordinate.
* @param y the y coordinate.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
ImageObserver observer) {
return drawImage(img, x, y, null, observer);
}
/**
* Draws as much of the specified image as has already been scaled
* to fit inside the specified rectangle.
* drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the image observer by calling its imageUpdate method.
* drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* @param img the specified image to be drawn.
* This method does nothing if img is null.
* @param x the x coordinate.
* @param y the y coordinate.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* In this WPathGraphics implementation,
* this parameter can be null in which
* case that background is made a transparent
* white.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
Color bgcolor,
ImageObserver observer) {
if (img == null) {
return true;
}
boolean result;
int srcWidth = img.getWidth(null);
int srcHeight = img.getHeight(null);
if (srcWidth < 0 || srcHeight < 0) {
result = false;
} else {
result = drawImage(img, x, y, srcWidth, srcHeight, bgcolor, observer);
}
return result;
}
/**
* Draws as much of the specified image as has already been scaled
* to fit inside the specified rectangle.
* drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* img is null.
* @param x the x coordinate.
* @param y the y coordinate.
* @param width the width of the rectangle.
* @param height the height of the rectangle.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
int width, int height,
Color bgcolor,
ImageObserver observer) {
if (img == null) {
return true;
}
boolean result;
int srcWidth = img.getWidth(null);
int srcHeight = img.getHeight(null);
if (srcWidth < 0 || srcHeight < 0) {
result = false;
} else {
result = drawImage(img,
x, y, x + width, y + height,
0, 0, srcWidth, srcHeight,
observer);
}
return result;
}
/**
* Draws as much of the specified area of the specified image as is
* currently available, scaling it on the fly to fit inside the
* specified area of the destination drawable surface. Transparent pixels
* do not affect whatever pixels are already there.
* drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* img is null.
* @param dx1 the x coordinate of the first corner of the
* destination rectangle.
* @param dy1 the y coordinate of the first corner of the
* destination rectangle.
* @param dx2 the x coordinate of the second corner of the
* destination rectangle.
* @param dy2 the y coordinate of the second corner of the
* destination rectangle.
* @param sx1 the x coordinate of the first corner of the
* source rectangle.
* @param sy1 the y coordinate of the first corner of the
* source rectangle.
* @param sx2 the x coordinate of the second corner of the
* source rectangle.
* @param sy2 the y coordinate of the second corner of the
* source rectangle.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of the image is
* scaled and converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.1
*/
public boolean drawImage(Image img,
int dx1, int dy1, int dx2, int dy2,
int sx1, int sy1, int sx2, int sy2,
Color bgcolor,
ImageObserver observer) {
if (img == null) {
return true;
}
int imgWidth = img.getWidth(null);
int imgHeight = img.getHeight(null);
if (imgWidth < 0 || imgHeight < 0) {
return true;
}
int srcWidth = sx2 - sx1;
int srcHeight = sy2 - sy1;
/* Create a transform which describes the changes
* from the source coordinates to the destination
* coordinates. The scaling is determined by the
* ratio of the two rectangles, while the translation
* comes from the difference of their origins.
*/
float scalex = (float) (dx2 - dx1) / srcWidth;
float scaley = (float) (dy2 - dy1) / srcHeight;
AffineTransform xForm
= new AffineTransform(scalex,
0,
0,
scaley,
dx1 - (sx1 * scalex),
dy1 - (sy1 * scaley));
/* drawImageToPlatform needs the top-left of the source area and
* a positive width and height. The xform describes how to map
* src->dest, so that information is not lost.
*/
int tmp=0;
if (sx2 < sx1) {
tmp = sx1;
sx1 = sx2;
sx2 = tmp;
}
if (sy2 < sy1) {
tmp = sy1;
sy1 = sy2;
sy2 = tmp;
}
/* if src area is beyond the bounds of the image, we must clip it.
* The transform is based on the specified area, not the clipped one.
*/
if (sx1 < 0) {
sx1 = 0;
} else if (sx1 > imgWidth) { // empty srcArea, nothing to draw
sx1 = imgWidth;
}
if (sx2 < 0) { // empty srcArea, nothing to draw
sx2 = 0;
} else if (sx2 > imgWidth) {
sx2 = imgWidth;
}
if (sy1 < 0) {
sy1 = 0;
} else if (sy1 > imgHeight) { // empty srcArea
sy1 = imgHeight;
}
if (sy2 < 0) { // empty srcArea
sy2 = 0;
} else if (sy2 > imgHeight) {
sy2 = imgHeight;
}
srcWidth = sx2 - sx1;
srcHeight = sy2 - sy1;
if (srcWidth <= 0 || srcHeight <= 0) {
return true;
}
return drawImageToPlatform(img, xForm, bgcolor,
sx1, sy1, srcWidth, srcHeight, false);
}
/**
* Draws an image, applying a transform from image space into user space
* before drawing.
* The transformation from user space into device space is done with
* the current transform in the Graphics2D.
* The given transformation is applied to the image before the
* transform attribute in the Graphics2D state is applied.
* The rendering attributes applied include the clip, transform,
* and composite attributes. Note that the result is
* undefined, if the given transform is noninvertible.
* @param img The image to be drawn.
* This method does nothing if img is null.
* @param xform The transformation from image space into user space.
* @param obs The image observer to be notified as more of the image
* is converted.
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public boolean drawImage(Image img,
AffineTransform xform,
ImageObserver obs) {
if (img == null) {
return true;
}
boolean result;
int srcWidth = img.getWidth(null);
int srcHeight = img.getHeight(null);
if (srcWidth < 0 || srcHeight < 0) {
result = false;
} else {
result = drawImageToPlatform(img, xform, null,
0, 0, srcWidth, srcHeight, false);
}
return result;
}
/**
* Draws a BufferedImage that is filtered with a BufferedImageOp.
* The rendering attributes applied include the clip, transform
* and composite attributes. This is equivalent to:
*
* img1 = op.filter(img, null);
* drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null);
*
* @param op The filter to be applied to the image before drawing.
* @param img The BufferedImage to be drawn.
* This method does nothing if img is null.
* @param x,y The location in user space where the image should be drawn.
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawImage(BufferedImage img,
BufferedImageOp op,
int x,
int y) {
if (img == null) {
return;
}
int srcWidth = img.getWidth(null);
int srcHeight = img.getHeight(null);
if (op != null) {
img = op.filter(img, null);
}
if (srcWidth <= 0 || srcHeight <= 0) {
return;
} else {
AffineTransform xform = new AffineTransform(1f,0f,0f,1f,x,y);
drawImageToPlatform(img, xform, null,
0, 0, srcWidth, srcHeight, false);
}
}
/**
* Draws an image, applying a transform from image space into user space
* before drawing.
* The transformation from user space into device space is done with
* the current transform in the Graphics2D.
* The given transformation is applied to the image before the
* transform attribute in the Graphics2D state is applied.
* The rendering attributes applied include the clip, transform,
* and composite attributes. Note that the result is
* undefined, if the given transform is noninvertible.
* @param img The image to be drawn.
* This method does nothing if img is null.
* @param xform The transformation from image space into user space.
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawRenderedImage(RenderedImage img,
AffineTransform xform) {
if (img == null) {
return;
}
BufferedImage bufferedImage = null;
int srcWidth = img.getWidth();
int srcHeight = img.getHeight();
if (srcWidth <= 0 || srcHeight <= 0) {
return;
}
if (img instanceof BufferedImage) {
bufferedImage = (BufferedImage) img;
} else {
bufferedImage = new BufferedImage(srcWidth, srcHeight,
BufferedImage.TYPE_INT_ARGB);
Graphics2D imageGraphics = bufferedImage.createGraphics();
imageGraphics.drawRenderedImage(img, xform);
}
drawImageToPlatform(bufferedImage, xform, null,
0, 0, srcWidth, srcHeight, false);
}
}