From 89679faa47dcab8d4ad73c49038f233665f6d44b Mon Sep 17 00:00:00 2001 From: Andreas Fitzek Date: Thu, 15 May 2014 12:46:16 +0200 Subject: Fixing GIF inclusion --- .../at/gv/egiz/pdfas/common/utils/ImageUtils.java | 69 ++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 pdf-as-common/src/main/java/at/gv/egiz/pdfas/common/utils/ImageUtils.java (limited to 'pdf-as-common/src') diff --git a/pdf-as-common/src/main/java/at/gv/egiz/pdfas/common/utils/ImageUtils.java b/pdf-as-common/src/main/java/at/gv/egiz/pdfas/common/utils/ImageUtils.java new file mode 100644 index 00000000..c5279100 --- /dev/null +++ b/pdf-as-common/src/main/java/at/gv/egiz/pdfas/common/utils/ImageUtils.java @@ -0,0 +1,69 @@ +package at.gv.egiz.pdfas.common.utils; + +import java.awt.AlphaComposite; +import java.awt.Color; +import java.awt.Graphics; +import java.awt.Graphics2D; +import java.awt.image.BufferedImage; +import java.awt.image.ColorModel; +import java.awt.image.IndexColorModel; +import java.awt.image.WritableRaster; + +public class ImageUtils { + + public static BufferedImage removeAlphaChannel(BufferedImage src) { + if (src.getColorModel().hasAlpha()) + { + // extract the alpha information + // WritableRaster alphaRaster = src. + //ColorModel cm = new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY), + // false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE); + //alpha = new BufferedImage(cm, alphaRaster, false, null); + // create a RGB image without alpha + + BufferedImage image = new BufferedImage(src.getWidth(), src.getHeight(), BufferedImage.TYPE_INT_RGB); + Graphics2D g = image.createGraphics(); + g.setComposite(AlphaComposite.Src); + g.drawImage(src, 0, 0, null); + g.dispose(); + return image; + } + return src; + } + + public static BufferedImage convertRGBAToIndexed(BufferedImage src) { + BufferedImage dest = new BufferedImage(src.getWidth(), src.getHeight(), + BufferedImage.TYPE_BYTE_INDEXED); + Graphics g = dest.getGraphics(); + g.setColor(new Color(231, 20, 189)); + g.fillRect(0, 0, dest.getWidth(), dest.getHeight()); // fill with a + // hideous color + // and make it + // transparent + dest = makeTransparent(dest, 0, 0); + dest.createGraphics().drawImage(src, 0, 0, null); + return dest; + } + + public static BufferedImage makeTransparent(BufferedImage image, int x, + int y) { + ColorModel cm = image.getColorModel(); + if (!(cm instanceof IndexColorModel)) + return image; // sorry... + IndexColorModel icm = (IndexColorModel) cm; + WritableRaster raster = image.getRaster(); + int pixel = raster.getSample(x, y, 0); // pixel is offset in ICM's + // palette + int size = icm.getMapSize(); + byte[] reds = new byte[size]; + byte[] greens = new byte[size]; + byte[] blues = new byte[size]; + icm.getReds(reds); + icm.getGreens(greens); + icm.getBlues(blues); + IndexColorModel icm2 = new IndexColorModel(8, size, reds, greens, + blues, pixel); + return new BufferedImage(icm2, raster, image.isAlphaPremultiplied(), + null); + } +} -- cgit v1.2.3