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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package demos.xtrans;
import com.sun.opengl.impl.awt.Java2D;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.geom.Rectangle2D;
import javax.media.opengl.DebugGL2;
import javax.media.opengl.GL;
import javax.media.opengl.GL2ES1;
import javax.media.opengl.GL2;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawableFactory;
import javax.media.opengl.GLProfile;
import javax.swing.JDesktopPane;
/** A desktop manager implementation supporting accelerated
* transitions of the components on the desktop via OpenGL. This class
* does not need to be instantiated by end users; it is installed
* automatically when an XTDesktopPane is constructed.
*
* @author Kenneth Russell
*/
public class XTDesktopManager extends OffscreenDesktopManager {
private GLContext j2dContext;
private Object j2dContextSurfaceIdentifier;
private int oglTextureId;
private int prevBackBufferWidth;
private int prevBackBufferHeight;
private int textureTarget = GL.GL_TEXTURE_2D;
/** Returns the OpenGL texture object ID associated with the
off-screen back buffer for all of the components on the
desktop. */
public int getOpenGLTextureObject() {
return oglTextureId;
}
/** Returns a rectangle specifying the OpenGL texture coordinates of
the passed component in the texture object. The x and y
coordinates of the returned rectangle specify the lower left
corner of the component's image. */
public Rectangle2D getOpenGLTextureCoords(Component c) {
Rectangle rect = getBoundsOnBackBuffer(c);
if (rect == null) {
throw new RuntimeException("Unknown component " + c);
}
double offscreenWidth = getOffscreenBackBufferWidth();
double offscreenHeight = getOffscreenBackBufferHeight();
return new Rectangle2D.Double(rect.x / offscreenWidth,
(offscreenHeight - rect.y - rect.height) / offscreenHeight,
rect.width / offscreenWidth,
rect.height / offscreenHeight);
}
/** Updates the off-screen buffer of this desktop manager and makes
the rendering results available to OpenGL in the form of a
texture object. */
public void updateOffscreenBuffer(OffscreenDesktopPane parent) {
boolean needsCopy = needsCopyBack();
boolean hadPrevBackBuffer = false;
super.updateOffscreenBuffer(parent);
Image img = getOffscreenBackBuffer();
final boolean mustResizeOGLTexture = ((oglTextureId == 0) ||
(img == null) ||
(prevBackBufferWidth != img.getWidth(null)) ||
(prevBackBufferHeight != img.getHeight(null)));
if (needsCopy) {
final Graphics g = getOffscreenGraphics();
// Capture off-screen buffer contents into OpenGL texture
Java2D.invokeWithOGLContextCurrent(g, new Runnable() {
public void run() {
// Get valid Java2D context
if (j2dContext == null ||
j2dContextSurfaceIdentifier != Java2D.getOGLSurfaceIdentifier(g)) {
GLProfile glp = GLProfile.getDefault();
j2dContext = GLDrawableFactory.getFactory(glp).createExternalGLContext();
j2dContext.setGL(new DebugGL2(j2dContext.getGL().getGL2()));
j2dContextSurfaceIdentifier = Java2D.getOGLSurfaceIdentifier(g);
}
j2dContext.makeCurrent(); // No-op
try {
GL2 gl = j2dContext.getGL().getGL2();
if (oglTextureId == 0) {
// Set up and initialize texture
int[] tmp = new int[1];
gl.glGenTextures(1, tmp, 0);
oglTextureId = tmp[0];
if (oglTextureId == 0) {
throw new RuntimeException("Error generating OpenGL back buffer texture");
}
assert mustResizeOGLTexture : "Must know we need to resize";
}
gl.glBindTexture(textureTarget, oglTextureId);
int offscreenWidth = getOffscreenBackBufferWidth();
int offscreenHeight = getOffscreenBackBufferHeight();
if (mustResizeOGLTexture) {
prevBackBufferWidth = offscreenWidth;
prevBackBufferHeight = offscreenHeight;
gl.glTexImage2D(textureTarget,
0,
GL.GL_RGBA8,
offscreenWidth,
offscreenHeight,
0,
GL.GL_RGBA,
GL.GL_UNSIGNED_BYTE,
null);
}
// Copy texture from offscreen buffer
// NOTE: assumes read buffer is set up
// FIXME: could be more efficient by copying only bounding rectangle
gl.glPixelStorei(GL2.GL_UNPACK_SWAP_BYTES, GL.GL_FALSE);
gl.glPixelStorei(GL2.GL_PACK_SWAP_BYTES, GL.GL_FALSE);
gl.glPixelStorei(GL2.GL_UNPACK_LSB_FIRST, GL.GL_FALSE);
gl.glPixelStorei(GL2.GL_PACK_LSB_FIRST, GL.GL_FALSE);
gl.glPixelStorei(GL2.GL_UNPACK_ROW_LENGTH, 0);
gl.glPixelStorei(GL2.GL_PACK_ROW_LENGTH, 0);
gl.glPixelStorei(GL2.GL_UNPACK_SKIP_ROWS, 0);
gl.glPixelStorei(GL2.GL_PACK_SKIP_ROWS, 0);
gl.glPixelStorei(GL2.GL_UNPACK_SKIP_PIXELS, 0);
gl.glPixelStorei(GL2.GL_PACK_SKIP_PIXELS, 0);
gl.glPixelStorei(GL2.GL_UNPACK_ALIGNMENT, 1);
gl.glPixelStorei(GL2.GL_PACK_ALIGNMENT, 1);
gl.glPixelTransferf(GL2.GL_RED_SCALE, 1);
gl.glPixelTransferf(GL2.GL_GREEN_SCALE, 1);
gl.glPixelTransferf(GL2.GL_BLUE_SCALE, 1);
gl.glPixelTransferf(GL2.GL_ALPHA_SCALE, 1);
gl.glPixelTransferf(GL2.GL_RED_BIAS, 0);
gl.glPixelTransferf(GL2.GL_GREEN_BIAS, 0);
gl.glPixelTransferf(GL2.GL_BLUE_BIAS, 0);
gl.glPixelTransferf(GL2.GL_ALPHA_BIAS, 0);
// long start = System.currentTimeMillis();
gl.glCopyTexSubImage2D(textureTarget,
0,
0,
0,
0,
0,
offscreenWidth,
offscreenHeight);
// long end = System.currentTimeMillis();
// System.err.println("glCopyTexSubImage2D " + offscreenWidth + "x" + offscreenHeight + " took " + (end - start) + " ms");
} finally {
j2dContext.release();
}
}
});
}
}
// Ideally we would force a repaint only of the 2D bounds of the 3D
// component projected onto the desktop. However for expedience
// we'll currently just repaint the entire desktop to get correct
// results.
protected void repaintPortionOfDesktop(JDesktopPane desktop, Component comp) {
desktop.repaint();
}
}
|
