AbstractFopImage subclass using ImageIO (JDK >= 1.4) to load images (works with GIF, too). Some of the code dealing with the BufferedImage could probably be extracted to a common subclass since it's mostly a copy from a different FopImage implementation.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@231223 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 145 insertions, 0 deletions

diff --git a/src/java-1.4/org/apache/fop/image/ImageIOImage.java b/src/java-1.4/org/apache/fop/image/ImageIOImage.java
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+++ b/src/java-1.4/org/apache/fop/image/ImageIOImage.java
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+/*
+ * Copyright 2005 The Apache Software Foundation.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.image;
+
+// AWT
+import java.awt.Color;
+import java.awt.image.ColorModel;
+import java.awt.image.IndexColorModel;
+import java.awt.image.BufferedImage;
+
+// ImageIO
+import javax.imageio.ImageIO;
+
+// FOP
+import org.apache.fop.apps.FOUserAgent;
+
+/**
+ * FopImage object using ImageIO.
+ * @see AbstractFopImage
+ * @see FopImage
+ */
+public class ImageIOImage extends AbstractFopImage {
+
+    /**
+     * Creates a new ImageIOImage.
+     * @param info the image info from the ImageReader
+     */
+    public ImageIOImage(FopImage.ImageInfo info) {
+        super(info);
+    }
+
+    /** @see org.apache.fop.image.AbstractFopImage#loadBitmap() */
+    protected boolean loadBitmap() {
+        try {
+            BufferedImage imageData = ImageIO.read(inputStream);
+
+            this.height = imageData.getHeight();
+            this.width = imageData.getWidth();
+
+            ColorModel cm = imageData.getColorModel();
+            this.bitsPerPixel = cm.getComponentSize(0); //only use first, we assume all are equal
+            this.colorSpace = cm.getColorSpace();
+
+            int[] tmpMap = imageData.getRGB(0, 0, this.width,
+                                            this.height, null, 0, this.width);
+
+            if (cm.hasAlpha()) {
+                // java.awt.Transparency. BITMASK or OPAQUE or TRANSLUCENT
+                int transparencyType = cm.getTransparency();
+                
+                if (transparencyType == java.awt.Transparency.OPAQUE) {
+                    this.isTransparent = false;
+                } else if (transparencyType == java.awt.Transparency.BITMASK) {
+                    if (cm instanceof IndexColorModel) {
+                        this.isTransparent = false;
+                        byte[] alphas = new byte[
+                                          ((IndexColorModel) cm).getMapSize()];
+                        byte[] reds = new byte[
+                                        ((IndexColorModel) cm).getMapSize()];
+                        byte[] greens = new byte[
+                                          ((IndexColorModel) cm).getMapSize()];
+                        byte[] blues = new byte[
+                                         ((IndexColorModel) cm).getMapSize()];
+                        ((IndexColorModel) cm).getAlphas(alphas);
+                        ((IndexColorModel) cm).getReds(reds);
+                        ((IndexColorModel) cm).getGreens(greens);
+                        ((IndexColorModel) cm).getBlues(blues);
+                        for (int i = 0;
+                                i < ((IndexColorModel) cm).getMapSize();
+                                i++) {
+                            if ((alphas[i] & 0xFF) == 0) {
+                                this.isTransparent = true;
+                                this.transparentColor = new Color(
+                                                            (int)(reds[i] & 0xFF),
+                                                            (int)(greens[i] & 0xFF),
+                                                            (int)(blues[i] & 0xFF));
+                                break;
+                            }
+                        }
+                    } else {
+                        // TRANSLUCENT
+                        /*
+                         * this.isTransparent = false;
+                         * for (int i = 0; i < this.width * this.height; i++) {
+                         * if (cm.getAlpha(tmpMap[i]) == 0) {
+                         * this.isTransparent = true;
+                         * this.transparentColor = new PDFColor(cm.getRed(tmpMap[i]), 
+                         * cm.getGreen(tmpMap[i]), cm.getBlue(tmpMap[i]));
+                         * break;
+                         * }
+                         * }
+                         * // or use special API...
+                         */
+                        this.isTransparent = false;
+                    }
+                } else {
+                    this.isTransparent = false;
+                }
+            } else {
+                this.isTransparent = false;
+            }
+
+            // Should take care of the ColorSpace and bitsPerPixel
+            this.bitmapsSize = this.width * this.height * 3;
+            this.bitmaps = new byte[this.bitmapsSize];
+            for (int i = 0; i < this.height; i++) {
+                for (int j = 0; j < this.width; j++) {
+                    int p = tmpMap[i * this.width + j];
+                    int r = (p >> 16) & 0xFF;
+                    int g = (p >> 8) & 0xFF;
+                    int b = (p) & 0xFF;
+                    this.bitmaps[3 * (i * this.width + j)] 
+                        = (byte)(r & 0xFF);
+                    this.bitmaps[3 * (i * this.width + j) + 1] 
+                        = (byte)(g & 0xFF);
+                    this.bitmaps[3 * (i * this.width + j) + 2] 
+                        = (byte)(b & 0xFF);
+                }
+            }
+
+        } catch (Exception ex) {
+            log.error("Error while loading image: " + ex.getMessage(), ex);
+            return false; 
+        }
+        return true;
+    }
+
+}
+