// Copyright 2002-2007, FreeHEP.
package org.freehep.graphicsio.emf.gdi;
import com.google.code.appengine.awt.Color;
import com.google.code.appengine.awt.Rectangle;
import com.google.code.appengine.awt.geom.AffineTransform;
import com.google.code.appengine.awt.image.RenderedImage;
import com.google.code.appengine.awt.image.BufferedImage;
import java.io.IOException;
import org.freehep.graphicsio.ImageGraphics2D;
import org.freehep.graphicsio.ImageConstants;
import org.freehep.graphicsio.emf.EMFConstants;
import org.freehep.graphicsio.emf.EMFInputStream;
import org.freehep.graphicsio.emf.EMFOutputStream;
import org.freehep.graphicsio.emf.EMFTag;
import org.freehep.graphicsio.emf.EMFImageLoader;
import org.freehep.graphicsio.emf.EMFRenderer;
import org.freehep.util.io.NoCloseOutputStream;
/**
* PNG and JPG seem not to work.
*
* @author Mark Donszelmann
* @version $Id: AlphaBlend.java 10367 2007-01-22 19:26:48Z duns $
*/
public class AlphaBlend extends EMFTag implements EMFConstants {
private final static int size = 108;
private Rectangle bounds;
private int x, y, width, height;
private BlendFunction dwROP;
private int xSrc, ySrc;
private AffineTransform transform;
private Color bkg;
private int usage;
private BitmapInfo bmi;
private BufferedImage image;
public AlphaBlend() {
super(114, 1);
}
public AlphaBlend(
Rectangle bounds,
int x,
int y,
int width,
int height,
AffineTransform transform,
BufferedImage image,
Color bkg) {
this();
this.bounds = bounds;
this.x = x;
this.y = y;
this.width = width;
this.height = height;
this.dwROP = new BlendFunction(AC_SRC_OVER, 0, 0xFF, AC_SRC_ALPHA);
this.xSrc = 0;
this.ySrc = 0;
this.transform = transform;
this.bkg = (bkg == null) ? new Color(0, 0, 0, 0) : bkg;
this.usage = DIB_RGB_COLORS;
this.image = image;
this.bmi = null;
}
public EMFTag read(int tagID, EMFInputStream emf, int len)
throws IOException {
AlphaBlend tag = new AlphaBlend();
tag.bounds = emf.readRECTL(); // 16
tag.x = emf.readLONG(); // 20
tag.y = emf.readLONG(); // 24
tag.width = emf.readLONG(); // 28
tag.height = emf.readLONG(); // 32
tag.dwROP = new BlendFunction(emf); // 36
tag.xSrc = emf.readLONG(); // 40
tag.ySrc = emf.readLONG(); // 44
tag.transform = emf.readXFORM(); // 68
tag.bkg = emf.readCOLORREF(); // 72
tag.usage = emf.readDWORD(); // 76
// ignored
/* int bmiOffset = */ emf.readDWORD(); // 80
int bmiSize = emf.readDWORD(); // 84
/* int bitmapOffset = */ emf.readDWORD(); // 88
int bitmapSize = emf.readDWORD(); // 92
/* int width = */ emf.readLONG(); // 96
/* int height = */ emf.readLONG(); // 100
// FIXME: this size can differ and can be placed somewhere else
tag.bmi = (bmiSize > 0) ? new BitmapInfo(emf) : null;
tag.image = EMFImageLoader.readImage(
tag.bmi.getHeader(),
tag.width,
tag.height,
emf,
bitmapSize,
tag.dwROP);
return tag;
}
public void write(int tagID, EMFOutputStream emf) throws IOException {
emf.writeRECTL(bounds);
emf.writeLONG(x);
emf.writeLONG(y);
emf.writeLONG(width);
emf.writeLONG(height);
dwROP.write(emf);
emf.writeLONG(xSrc);
emf.writeLONG(ySrc);
emf.writeXFORM(transform);
emf.writeCOLORREF(bkg);
emf.writeDWORD(usage);
emf.writeDWORD(size); // bmi follows this record immediately
emf.writeDWORD(BitmapInfoHeader.size);
emf.writeDWORD(size + BitmapInfoHeader.size); // bitmap follows bmi
emf.pushBuffer();
int encode;
// plain
encode = BI_RGB;
ImageGraphics2D.writeImage(
(RenderedImage) image,
ImageConstants.RAW.toLowerCase(),
ImageGraphics2D.getRAWProperties(bkg, "*BGRA"),
new NoCloseOutputStream(emf));
// emf.writeImage(image, bkg, "*BGRA", 1);
// png
// encode = BI_PNG;
// ImageGraphics2D.writeImage(image, "png", new Properties(), new
// NoCloseOutputStream(emf));
// jpg
// encode = BI_JPEG;
// ImageGraphics2D.writeImage(image, "jpg", new Properties(), new
// NoCloseOutputStream(emf));
int length = emf.popBuffer();
emf.writeDWORD(length);
emf.writeLONG(image.getWidth());
emf.writeLONG(image.getHeight());
BitmapInfoHeader header = new BitmapInfoHeader(image.getWidth(), image
.getHeight(), 32, encode, length, 0, 0, 0, 0);
bmi = new BitmapInfo(header);
bmi.write(emf);
emf.append();
}
public String toString() {
return super.toString() +
"\n bounds: " + bounds +
"\n x, y, w, h: " + x + " " + y + " " + width + " " + height +
"\n dwROP: " + dwROP +
"\n xSrc, ySrc: " + xSrc + " " + ySrc +
"\n transform: " + transform +
"\n bkg: " + bkg +
"\n usage: " + usage +
"\n" + ((bmi != null) ? bmi.toString() : " bitmap: null");
}
/**
* displays the tag using the renderer
*
* @param renderer EMFRenderer storing the drawing session data
*/
public void render(EMFRenderer renderer) {
// This function displays bitmaps that have transparent or semitransparent pixels.
if (image != null) {
renderer.drawImage(image, x, y, width, height);
}
}
}