1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.render;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.Transparency;
import java.awt.color.ColorSpace;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import org.apache.fop.render.Graphics2DAdapter;
import org.apache.fop.render.Graphics2DImagePainter;
import org.apache.fop.render.RendererContext.RendererContextWrapper;
import org.apache.fop.util.UnitConv;
/**
* Graphics2DAdapter implementation for PCL and HP GL/2.
*/
public abstract class AbstractGraphics2DAdapter implements Graphics2DAdapter {
/**
* Paints the image to a BufferedImage and returns that.
* @param painter the painter which will paint the actual image
* @param context the renderer context for the current renderer
* @param resolution the requested bitmap resolution
* @param gray true if the generated image should be in grayscales
* @return the generated BufferedImage
*/
protected BufferedImage paintToBufferedImage(Graphics2DImagePainter painter,
RendererContextWrapper context, int resolution, boolean gray, boolean withAlpha) {
int bmw = (int)Math.ceil(UnitConv.mpt2px(context.getWidth(), resolution));
int bmh = (int)Math.ceil(UnitConv.mpt2px(context.getHeight(), resolution));
BufferedImage bi;
if (gray) {
if (withAlpha) {
bi = createGrayBufferedImageWithAlpha(bmw, bmh);
} else {
bi = new BufferedImage(bmw, bmh, BufferedImage.TYPE_BYTE_GRAY);
}
} else {
if (withAlpha) {
bi = new BufferedImage(bmw, bmh, BufferedImage.TYPE_INT_ARGB);
} else {
bi = new BufferedImage(bmw, bmh, BufferedImage.TYPE_INT_RGB);
}
}
Graphics2D g2d = bi.createGraphics();
try {
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
RenderingHints.VALUE_FRACTIONALMETRICS_ON);
setRenderingHintsForBufferedImage(g2d);
g2d.setBackground(Color.white);
g2d.setColor(Color.black);
if (!withAlpha) {
g2d.clearRect(0, 0, bmw, bmh);
}
/* debug code
int off = 2;
g2d.drawLine(off, 0, off, bmh);
g2d.drawLine(bmw - off, 0, bmw - off, bmh);
g2d.drawLine(0, off, bmw, off);
g2d.drawLine(0, bmh - off, bmw, bmh - off);
*/
double sx = (double)bmw / context.getWidth();
double sy = (double)bmh / context.getHeight();
g2d.scale(sx, sy);
//Paint the image on the BufferedImage
Rectangle2D area = new Rectangle2D.Double(
0.0, 0.0, context.getWidth(), context.getHeight());
painter.paint(g2d, area);
} finally {
g2d.dispose();
}
return bi;
}
private static BufferedImage createGrayBufferedImageWithAlpha(int width, int height) {
BufferedImage bi;
boolean alphaPremultiplied = true;
int bands = 2;
int[] bits = new int[bands];
for (int i = 0; i < bands; i++) {
bits[i] = 8;
}
ColorModel cm = new ComponentColorModel(
ColorSpace.getInstance(ColorSpace.CS_GRAY),
bits,
true, alphaPremultiplied,
Transparency.TRANSLUCENT,
DataBuffer.TYPE_BYTE);
WritableRaster wr = Raster.createInterleavedRaster(
DataBuffer.TYPE_BYTE,
width, height, bands,
new Point(0, 0));
bi = new BufferedImage(cm, wr, alphaPremultiplied, null);
return bi;
}
/**
* Sets rendering hints on the Graphics2D created for painting to a BufferedImage. Subclasses
* can modify the settings to customize the behaviour.
* @param g2d the Graphics2D instance
*/
protected void setRenderingHintsForBufferedImage(Graphics2D g2d) {
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_OFF);
g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
}
}
|
