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a few last minute changes, clean-ups an comment-corrections.

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lehni 2004-06-17 10:24:40 +00:00
parent 63321fbae2
commit 252fb40ee0
1 changed files with 79 additions and 89 deletions
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158
src/helma/image/ImageWrapper.java
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@ -17,15 +17,15 @@
/* /*
* A few explanations: * A few explanations:
* *
* - ImageWrapper.image is either an AWT Image or a BufferedImage. * - this.image is either an AWT Image or a BufferedImage.
* It depends on the ImageGenerator in what form the Image initially is. * It depends on the ImageGenerator in what form the Image initially is.
* (the ImageIO implementation only uses BufferedImages for example. * (the ImageIO implementation only uses BufferedImages for example.)
* *
* As soon as some action that needs the graphics object is performed and the * As soon as some action that needs the graphics object is performed and the
* image is still in AWT format, it is converted to a BufferedImage * image is still in AWT format, it is converted to a BufferedImage
* *
* Any internal function that performs graphical actions needs to call * Any internal function that performs graphical actions needs to call
* createGraphics (but only if this.graphics == null) * getGraphics, never rely on this.graphics being set correctly!
* *
* - ImageWrapper objects are created and safed by the ImageGenerator class * - ImageWrapper objects are created and safed by the ImageGenerator class
* all different implementations of Imaging functionallity are implemented * all different implementations of Imaging functionallity are implemented
@ -47,8 +47,8 @@ public class ImageWrapper {
protected Image image; protected Image image;
protected int width; protected int width;
protected int height; protected int height;
protected Graphics2D graphics;
protected ImageGenerator generator; protected ImageGenerator generator;
private Graphics2D graphics;
/** /**
* Creates a new ImageWrapper object. * Creates a new ImageWrapper object.
@ -65,9 +65,7 @@ public class ImageWrapper {
this.width = width; this.width = width;
this.height = height; this.height = height;
this.generator = generator; this.generator = generator;
// graphics are turned off by default. every graphical function // graphics are turned off by default. getGraphics activates it if necessary.
// has to assure that graphcis != null, and if not, call createGraphics
// the function that turns this image into a paintable one!
this.graphics = null; this.graphics = null;
} }
@ -96,53 +94,18 @@ public class ImageWrapper {
} }
/** /**
* convert's the internal image to a BufferedImage and creates a graphics object: * Returns the Graphics object to directly paint to this Image. Converts the
* internal image to a BufferedImage if necessary.
*
* @return the Graphics object for drawing into this image
*/ */
protected void createGraphics() { public Graphics getGraphics() {
if (graphics == null) {
// make sure the image is a BufferedImage and then create a graphics object
BufferedImage img = getBufferedImage(); BufferedImage img = getBufferedImage();
graphics = img.createGraphics(); graphics = img.createGraphics();
} }
return graphics;
/**
* Sets the palette index of the transparent color for Images with an
* IndexColorModel. This can be used together with
* {@link helma.image.ImageWrapper#getPixel}.
*/
public void setTransparentPixel(int trans) throws IOException {
BufferedImage bi = this.getBufferedImage();
ColorModel cm = bi.getColorModel();
if (!(cm instanceof IndexColorModel))
throw new IOException("Image is not indexed!");
IndexColorModel icm = (IndexColorModel) cm;
int mapSize = icm.getMapSize();
byte reds[] = new byte[mapSize];
byte greens[] = new byte[mapSize];
byte blues[] = new byte[mapSize];
icm.getReds(reds);
icm.getGreens(greens);
icm.getBlues(blues);
// create the new IndexColorModel with the changed transparentPixel:
icm = new IndexColorModel(icm.getPixelSize(), mapSize, reds, greens,
blues, trans);
// create a new BufferedImage with the new IndexColorModel and the old
// raster:
image = new BufferedImage(icm, bi.getRaster(), false, null);
}
/**
* Returns the pixel at x, y. If the image is indexed, it returns the
* palette index, otherwise the rgb code of the color is returned.
*
* @param x the x coordinate of the pixel
* @param y the y coordinate of the pixel
* @return the pixel at x, y
*/
public int getPixel(int x, int y) {
BufferedImage bi = this.getBufferedImage();
if (bi.getColorModel() instanceof IndexColorModel)
return bi.getRaster().getSample(x, y, 0);
else
return bi.getRGB(x, y);
} }
/** /**
@ -157,16 +120,6 @@ public class ImageWrapper {
return wrapper; return wrapper;
} }
/**
* Returns the Graphics object to directly paint to this Image.
*
* @return the Graphics object used by this image
*/
public Graphics getGraphics() {
if (graphics == null) createGraphics();
return graphics;
}
/** /**
* Returns the Image object represented by this ImageWrapper. * Returns the Image object represented by this ImageWrapper.
* *
@ -200,8 +153,7 @@ public class ImageWrapper {
* Set the font used to write on this image. * Set the font used to write on this image.
*/ */
public void setFont(String name, int style, int size) { public void setFont(String name, int style, int size) {
if (graphics == null) createGraphics(); getGraphics().setFont(new Font(name, style, size));
graphics.setFont(new Font(name, style, size));
} }
/** /**
@ -212,8 +164,7 @@ public class ImageWrapper {
* @param blue ... * @param blue ...
*/ */
public void setColor(int red, int green, int blue) { public void setColor(int red, int green, int blue) {
if (graphics == null) createGraphics(); getGraphics().setColor(new Color(red, green, blue));
graphics.setColor(new Color(red, green, blue));
} }
/** /**
@ -222,8 +173,7 @@ public class ImageWrapper {
* @param color ... * @param color ...
*/ */
public void setColor(int color) { public void setColor(int color) {
if (graphics == null) createGraphics(); getGraphics().setColor(new Color(color));
graphics.setColor(new Color(color));
} }
/** /**
@ -232,8 +182,7 @@ public class ImageWrapper {
* @param color ... * @param color ...
*/ */
public void setColor(Color color) { public void setColor(Color color) {
if (graphics == null) createGraphics(); getGraphics().setColor(color);
graphics.setColor(color);
} }
/** /**
@ -244,8 +193,7 @@ public class ImageWrapper {
* @param y ... * @param y ...
*/ */
public void drawString(String str, int x, int y) { public void drawString(String str, int x, int y) {
if (graphics == null) createGraphics(); getGraphics().drawString(str, x, y);
graphics.drawString(str, x, y);
} }
/** /**
@ -257,8 +205,7 @@ public class ImageWrapper {
* @param y2 ... * @param y2 ...
*/ */
public void drawLine(int x1, int y1, int x2, int y2) { public void drawLine(int x1, int y1, int x2, int y2) {
if (graphics == null) createGraphics(); getGraphics().drawLine(x1, y1, x2, y2);
graphics.drawLine(x1, y1, x2, y2);
} }
/** /**
@ -270,8 +217,7 @@ public class ImageWrapper {
* @param h ... * @param h ...
*/ */
public void drawRect(int x, int y, int w, int h) { public void drawRect(int x, int y, int w, int h) {
if (graphics == null) createGraphics(); getGraphics().drawRect(x, y, w, h);
graphics.drawRect(x, y, w, h);
} }
/** /**
@ -281,13 +227,11 @@ public class ImageWrapper {
* @param x ... * @param x ...
* @param y ... * @param y ...
*/ */
public void drawImage(String filename, int x, int y) { public void drawImage(String filename, int x, int y)
if (graphics == null) createGraphics(); throws IOException {
try {
Image img = generator.read(filename); Image img = generator.read(filename);
graphics.drawImage(img, x, y, null); if (img != null)
} catch (Exception ignore) { getGraphics().drawImage(img, x, y, null);
}
} }
/** /**
@ -299,8 +243,7 @@ public class ImageWrapper {
* @param h ... * @param h ...
*/ */
public void fillRect(int x, int y, int w, int h) { public void fillRect(int x, int y, int w, int h) {
if (graphics == null) createGraphics(); getGraphics().fillRect(x, y, w, h);
graphics.fillRect(x, y, w, h);
} }
/** /**
@ -330,9 +273,13 @@ public class ImageWrapper {
* @param h ... * @param h ...
*/ */
public void crop(int x, int y, int w, int h) { public void crop(int x, int y, int w, int h) {
// do not use the CropFilter any longer:
if (image instanceof BufferedImage) { if (image instanceof BufferedImage) {
// BufferedImages define their own function for cropping:
image = ((BufferedImage)image).getSubimage(x, y, w, h); image = ((BufferedImage)image).getSubimage(x, y, w, h);
} else { } else {
// The internal image will be a BufferedImage after this.
// Simply create it with the cropped dimensions and draw the image into it:
BufferedImage buffered = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB); BufferedImage buffered = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = buffered.createGraphics(); Graphics2D g2d = buffered.createGraphics();
g2d.drawImage(image, -x, -y, null); g2d.drawImage(image, -x, -y, null);
@ -380,9 +327,10 @@ public class ImageWrapper {
(double) h / height (double) h / height
); );
// if the image is scaled, used the Graphcis2D method, otherwise use AWT: // if the image is scaled, used the Graphcis2D method, otherwise use AWT:
if (factor > 1f) if (factor > 1f) {
// scalie it with the Graphics2D approach for supperiour quality.
image = resize(w, h, true); image = resize(w, h, true);
else { } else {
// Area averaging has the best results for shrinking of images: // Area averaging has the best results for shrinking of images:
/* /*
// as getScaledInstance is asynchronous, the ImageWaiter is needed here too: // as getScaledInstance is asynchronous, the ImageWaiter is needed here too:
@ -476,4 +424,46 @@ public class ImageWrapper {
throws IOException { throws IOException {
generator.write(this, filename, quality, alpha); generator.write(this, filename, quality, alpha);
} }
/**
* Sets the palette index of the transparent color for Images with an
* IndexColorModel. This can be used together with
* {@link helma.image.ImageWrapper#getPixel}.
*/
public void setTransparentPixel(int trans) {
BufferedImage bi = this.getBufferedImage();
ColorModel cm = bi.getColorModel();
if (!(cm instanceof IndexColorModel))
throw new RuntimeException("Image is not indexed!");
IndexColorModel icm = (IndexColorModel) cm;
int mapSize = icm.getMapSize();
byte reds[] = new byte[mapSize];
byte greens[] = new byte[mapSize];
byte blues[] = new byte[mapSize];
icm.getReds(reds);
icm.getGreens(greens);
icm.getBlues(blues);
// create the new IndexColorModel with the changed transparentPixel:
icm = new IndexColorModel(icm.getPixelSize(), mapSize, reds, greens,
blues, trans);
// create a new BufferedImage with the new IndexColorModel and the old
// raster:
image = new BufferedImage(icm, bi.getRaster(), false, null);
}
/**
* Returns the pixel at x, y. If the image is indexed, it returns the
* palette index, otherwise the rgb code of the color is returned.
*
* @param x the x coordinate of the pixel
* @param y the y coordinate of the pixel
* @return the pixel at x, y
*/
public int getPixel(int x, int y) {
BufferedImage bi = this.getBufferedImage();
if (bi.getColorModel() instanceof IndexColorModel)
return bi.getRaster().getSample(x, y, 0);
else
return bi.getRGB(x, y);
}
} }