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1
51 package org.apache.fop.image;
52
53 import java.net.URL  ;
55 import java.awt.image.ImageProducer ;
56 import java.awt.image.ColorModel ;
57 import java.awt.image.IndexColorModel ;
58
59 import org.apache.fop.datatypes.ColorSpace;
61 import org.apache.fop.pdf.PDFColor;
62 import org.apache.fop.image.analyser.ImageReader;
63
64
71 public class GifImage extends AbstractFopImage {
72 public GifImage(URL href) throws FopImageException {
73 super(href);
74 }
75
76 public GifImage(URL href,
77 ImageReader imgReader) throws FopImageException {
78 super(href, imgReader);
79 }
80
81 protected void loadImage() throws FopImageException {
82 int[] tmpMap = null;
84 try {
85 ImageProducer ip = (ImageProducer )this.m_href.getContent();
86 FopImageConsumer consumer = new FopImageConsumer(ip);
87 ip.startProduction(consumer);
88
89
90 while (!consumer.isImageReady()) {
92 Thread.sleep(500);
93 }
94
95 this.m_height = consumer.getHeight();
96 this.m_width = consumer.getWidth();
97
98 try {
99 tmpMap = consumer.getImage();
100 } catch (Exception ex) {
101 throw new FopImageException("Image grabbing interrupted : "
102 + ex.getMessage());
103 }
104
105 ColorModel cm = consumer.getColorModel();
106 this.m_bitsPerPixel = 8;
107 this.m_colorSpace = new ColorSpace(ColorSpace.DEVICE_RGB);
109 if (cm.hasAlpha()) {
110 int transparencyType =
111 cm.getTransparency(); if (transparencyType == java.awt.Transparency.OPAQUE) {
113 this.m_isTransparent = false;
114 } else if (transparencyType
115 == java.awt.Transparency.BITMASK) {
116 if (cm instanceof IndexColorModel ) {
117 this.m_isTransparent = false;
118 byte[] alphas =
119 new byte[((IndexColorModel )cm).getMapSize()];
120 byte[] reds =
121 new byte[((IndexColorModel )cm).getMapSize()];
122 byte[] greens =
123 new byte[((IndexColorModel )cm).getMapSize()];
124 byte[] blues =
125 new byte[((IndexColorModel )cm).getMapSize()];
126 ((IndexColorModel )cm).getAlphas(alphas);
127 ((IndexColorModel )cm).getReds(reds);
128 ((IndexColorModel )cm).getGreens(greens);
129 ((IndexColorModel )cm).getBlues(blues);
130 for (int i = 0;
131 i < ((IndexColorModel )cm).getMapSize(); i++) {
132 if ((alphas[i] & 0xFF) == 0) {
133 this.m_isTransparent = true;
134 this.m_transparentColor =
135 new PDFColor((int)(reds[i] & 0xFF),
136 (int)(greens[i] & 0xFF),
137 (int)(blues[i] & 0xFF));
138 break;
139 }
140 }
141 } else {
142
153 this.m_isTransparent = false;
155 }
156 } else {
157 this.m_isTransparent = false;
158 }
159 } else {
160 this.m_isTransparent = false;
161 }
162 } catch (Exception ex) {
163 throw new FopImageException("Error while loading image "
164 + this.m_href.toString() + " : "
165 + ex.getClass() + " - "
166 + ex.getMessage());
167 }
168
169 this.m_bitmapsSize = this.m_width * this.m_height * 3;
171 this.m_bitmaps = new byte[this.m_bitmapsSize];
172 for (int i = 0; i < this.m_height; i++) {
173 for (int j = 0; j < this.m_width; j++) {
174 int p = tmpMap[i * this.m_width + j];
175 int r = (p >> 16) & 0xFF;
176 int g = (p >> 8) & 0xFF;
177 int b = (p) & 0xFF;
178 this.m_bitmaps[3 * (i * this.m_width + j)] = (byte)(r & 0xFF);
179 this.m_bitmaps[3 * (i * this.m_width + j) + 1] = (byte)(g
180 & 0xFF);
181 this.m_bitmaps[3 * (i * this.m_width + j) + 2] = (byte)(b
182 & 0xFF);
183 }
184 }
185 }
186
187 }
188
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