com.itextpdf.io.image.AwtImageDataFactory Maven / Gradle / Ivy
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Authors: Bruno Lowagie, Paulo Soares, et al.
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package com.itextpdf.io.image;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.awt.image.PixelGrabber;
class AwtImageDataFactory {
/**
* Gets an instance of an Image from a {@link java.awt.Image}
* @param image the {@link java.awt.Image} to convert
* @param color if different from null the transparency pixels are replaced by this color
* @return RawImage
*/
public static ImageData create(java.awt.Image image, java.awt.Color color) throws java.io.IOException {
return AwtImageDataFactory.create(image, color, false);
}
/**
* Gets an instance of an Image from a java.awt.Image.
* @param image the java.awt.Image to convert
* @param color if different from null the transparency pixels are replaced by this color
* @param forceBW if true the image is treated as black and white
* @return RawImage
*/
public static ImageData create(java.awt.Image image, java.awt.Color color, boolean forceBW) throws java.io.IOException {
if (image instanceof BufferedImage) {
BufferedImage bi = (BufferedImage) image;
if (bi.getType() == BufferedImage.TYPE_BYTE_BINARY && bi.getColorModel().getPixelSize() == 1) {
forceBW = true;
}
}
PixelGrabber pg = new PixelGrabber(image, 0, 0, -1, -1, true);
try {
pg.grabPixels();
} catch (InterruptedException e) {
throw new java.io.IOException("Java.awt.image was interrupted. Waiting for pixels");
}
if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
throw new java.io.IOException("Java.awt.image fetch aborted or errored");
}
int w = pg.getWidth();
int h = pg.getHeight();
int[] pixels = (int[]) pg.getPixels();
if (forceBW) {
int byteWidth = w / 8 + ((w & 7) != 0 ? 1 : 0);
byte[] pixelsByte = new byte[byteWidth * h];
int index = 0;
int size = h * w;
int transColor = 1;
if (color != null) {
transColor = color.getRed() + color.getGreen()
+ color.getBlue() < 384 ? 0 : 1;
}
int[] transparency = null;
int cbyte = 0x80;
int wMarker = 0;
int currByte = 0;
if (color != null) {
for (int j = 0; j < size; j++) {
int alpha = pixels[j] >> 24 & 0xff;
if (alpha < 250) {
if (transColor == 1)
currByte |= cbyte;
} else {
if ((pixels[j] & 0x888) != 0)
currByte |= cbyte;
}
cbyte >>= 1;
if (cbyte == 0 || wMarker + 1 >= w) {
pixelsByte[index++] = (byte) currByte;
cbyte = 0x80;
currByte = 0;
}
++wMarker;
if (wMarker >= w)
wMarker = 0;
}
} else {
for (int j = 0; j < size; j++) {
if (transparency == null) {
int alpha = pixels[j] >> 24 & 0xff;
if (alpha == 0) {
transparency = new int[2];
/* bugfix by M.P. Liston, ASC, was: ... ? 1: 0; */
transparency[0] = transparency[1] = (pixels[j] & 0x888) != 0 ? 0xff : 0;
}
}
if ((pixels[j] & 0x888) != 0)
currByte |= cbyte;
cbyte >>= 1;
if (cbyte == 0 || wMarker + 1 >= w) {
pixelsByte[index++] = (byte) currByte;
cbyte = 0x80;
currByte = 0;
}
++wMarker;
if (wMarker >= w)
wMarker = 0;
}
}
return ImageDataFactory.create(w, h, 1, 1, pixelsByte, transparency);
} else {
byte[] pixelsByte = new byte[w * h * 3];
byte[] smask = null;
int index = 0;
int size = h * w;
int red = 255;
int green = 255;
int blue = 255;
if (color != null) {
red = color.getRed();
green = color.getGreen();
blue = color.getBlue();
}
int[] transparency = null;
if (color != null) {
for (int j = 0; j < size; j++) {
int alpha = pixels[j] >> 24 & 0xff;
if (alpha < 250) {
pixelsByte[index++] = (byte) red;
pixelsByte[index++] = (byte) green;
pixelsByte[index++] = (byte) blue;
} else {
pixelsByte[index++] = (byte) (pixels[j] >> 16 & 0xff);
pixelsByte[index++] = (byte) (pixels[j] >> 8 & 0xff);
pixelsByte[index++] = (byte) (pixels[j] & 0xff);
}
}
} else {
int transparentPixel = 0;
smask = new byte[w * h];
boolean shades = false;
for (int j = 0; j < size; j++) {
byte alpha = smask[j] = (byte) (pixels[j] >> 24 & 0xff);
/* bugfix by Chris Nokleberg */
if (!shades) {
if (alpha != 0 && alpha != -1) {
shades = true;
} else if (transparency == null) {
if (alpha == 0) {
transparentPixel = pixels[j] & 0xffffff;
transparency = new int[6];
transparency[0] = transparency[1] = transparentPixel >> 16 & 0xff;
transparency[2] = transparency[3] = transparentPixel >> 8 & 0xff;
transparency[4] = transparency[5] = transparentPixel & 0xff;
// Added by Michael Klink
// Check whether this value for transparent pixels
// has already been used for a non-transparent one
// before this position
for (int prevPixel = 0; prevPixel < j; prevPixel++) {
if ((pixels[prevPixel] & 0xffffff) == transparentPixel) {
// found a prior use of the transparentPixel color
// and, therefore, cannot make use of this color
// for transparency; we could still use an image
// mask but for simplicity let's use a soft mask
// which already is implemented here
shades = true;
break;
}
}
}
} else if (((pixels[j] & 0xffffff) != transparentPixel) && (alpha == 0)) {
shades = true;
} else if (((pixels[j] & 0xffffff) == transparentPixel) && (alpha != 0)) {
shades = true;
}
}
pixelsByte[index++] = (byte) (pixels[j] >> 16 & 0xff);
pixelsByte[index++] = (byte) (pixels[j] >> 8 & 0xff);
pixelsByte[index++] = (byte) (pixels[j] & 0xff);
}
if (shades)
transparency = null;
else
smask = null;
}
ImageData img = ImageDataFactory.create(w, h, 3, 8, pixelsByte, transparency);
if (smask != null) {
ImageData sm = ImageDataFactory.create(w, h, 1, 8, smask, null);
sm.makeMask();
img.setImageMask(sm);
}
return img;
}
}
}
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