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1
17
18
19
20 package org.apache.fop.visual;
21
22 import java.awt.Color  ;
23 import java.awt.Graphics2D ;
24 import java.awt.image.BufferedImage ;
25 import java.awt.image.ColorModel ;
26 import java.awt.image.RenderedImage ;
27 import java.awt.image.WritableRaster ;
28 import java.io.File ;
29 import java.io.IOException ;
30 import java.io.InputStream ;
31 import java.net.URL ;
32
33 import org.apache.batik.ext.awt.image.GraphicsUtil;
34 import org.apache.batik.ext.awt.image.renderable.Filter;
35 import org.apache.batik.ext.awt.image.spi.ImageTagRegistry;
36 import org.apache.batik.util.ParsedURL;
37 import org.apache.commons.io.IOUtils;
38
39
48 public class BitmapComparator {
49
50
56 public static BufferedImage buildDiffImage(BufferedImage ref,
57 BufferedImage gen) {
58 BufferedImage diff = new BufferedImage (ref.getWidth(),
59 ref.getHeight(),
60 BufferedImage.TYPE_INT_ARGB);
61 WritableRaster refWR = ref.getRaster();
62 WritableRaster genWR = gen.getRaster();
63 WritableRaster dstWR = diff.getRaster();
64
65 boolean refPre = ref.isAlphaPremultiplied();
66 if (!refPre) {
67 ColorModel cm = ref.getColorModel();
68 cm = GraphicsUtil.coerceData(refWR, cm, true);
69 ref = new BufferedImage (cm, refWR, true, null);
70 }
71 boolean genPre = gen.isAlphaPremultiplied();
72 if (!genPre) {
73 ColorModel cm = gen.getColorModel();
74 cm = GraphicsUtil.coerceData(genWR, cm, true);
75 gen = new BufferedImage (cm, genWR, true, null);
76 }
77
78
79 int w = ref.getWidth();
80 int h = ref.getHeight();
81
82 int y, i, val;
83 int [] refPix = null;
84 int [] genPix = null;
85 for (y = 0; y < h; y++) {
86 refPix = refWR.getPixels (0, y, w, 1, refPix);
87 genPix = genWR.getPixels (0, y, w, 1, genPix);
88 for (i = 0; i < refPix.length; i++) {
89 val = ((refPix[i] - genPix[i]) * 10) + 128;
91 if ((val & 0xFFFFFF00) != 0) {
92 if ((val & 0x80000000) != 0) {
93 val = 0;
94 } else {
95 val = 255;
96 }
97 }
98 genPix[i] = val;
99 }
100 dstWR.setPixels(0, y, w, 1, genPix);
101 }
102
103 if (!genPre) {
104 ColorModel cm = gen.getColorModel();
105 cm = GraphicsUtil.coerceData(genWR, cm, false);
106 }
107
108 if (!refPre) {
109 ColorModel cm = ref.getColorModel();
110 cm = GraphicsUtil.coerceData(refWR, cm, false);
111 }
112
113 return diff;
114 }
115
116
122 public static BufferedImage buildCompareImage(BufferedImage [] images) {
123 BufferedImage cmp = new BufferedImage (
124 images[0].getWidth() * images.length,
125 images[0].getHeight(), BufferedImage.TYPE_INT_ARGB);
126
127 Graphics2D g = cmp.createGraphics();
128 g.setPaint(Color.white);
129 g.fillRect(0, 0, cmp.getWidth(), cmp.getHeight());
130 int lastWidth = 0;
131 for (int i = 0; i < images.length; i++) {
132 if (lastWidth > 0) {
133 g.translate(lastWidth, 0);
134 }
135 if (images[i] != null) {
136 g.drawImage(images[i], 0, 0, null);
137 lastWidth = images[i].getWidth();
138 } else {
139 lastWidth = 20; }
141 }
142 g.dispose();
143
144 return cmp;
145 }
146
147
154 public static BufferedImage buildCompareImage(BufferedImage ref,
155 BufferedImage gen) {
156 return buildCompareImage(new BufferedImage [] {ref, gen});
157 }
158
159
165 public static BufferedImage getImage(URL url) {
166 ImageTagRegistry reg = ImageTagRegistry.getRegistry();
167 Filter filt = reg.readURL(new ParsedURL(url));
168 if (filt == null) {
169 return null;
170 }
171
172 RenderedImage red = filt.createDefaultRendering();
173 if (red == null) {
174 return null;
175 }
176
177 BufferedImage img = new BufferedImage (red.getWidth(),
178 red.getHeight(),
179 BufferedImage.TYPE_INT_ARGB);
180 red.copyData(img.getRaster());
181
182 return img;
183 }
184
185
190 public static BufferedImage getImage(File bitmapFile) {
191 try {
192 InputStream in = new java.io.FileInputStream (bitmapFile);
193 try {
194 in = new java.io.BufferedInputStream (in);
195
196 ImageTagRegistry reg = ImageTagRegistry.getRegistry();
197 Filter filt = reg.readStream(in);
198 if (filt == null) {
199 return null;
200 }
201
202 RenderedImage red = filt.createDefaultRendering();
203 if (red == null) {
204 return null;
205 }
206
207 BufferedImage img = new BufferedImage (red.getWidth(),
208 red.getHeight(),
209 BufferedImage.TYPE_INT_ARGB);
210 red.copyData(img.getRaster());
211 return img;
212 } finally {
213 IOUtils.closeQuietly(in);
214 }
215 } catch (IOException e) {
216 return null;
217 }
218 }
219
220 }
221 |
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