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
|
/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions 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.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package demo;
import com.jogamp.opengl.util.GLBuffers;
import java.nio.*;
import javax.media.opengl.*;
import com.jogamp.opengl.util.texture.Texture;
import com.jogamp.opengl.util.texture.TextureData;
public class ReadBufferUtil {
protected int readPixelSizeLast = 0;
protected Buffer readPixelBuffer = null;
protected TextureData readTextureData = null;
protected Texture readTexture = new Texture(GL.GL_TEXTURE_2D);
public Buffer getPixelBuffer() { return readPixelBuffer; }
public void rewindPixelBuffer() { readPixelBuffer.rewind(); }
public TextureData getTextureData() { return readTextureData; }
public Texture getTexture() { return readTexture; }
public boolean isValid() {
return null!=readTexture && null!=readTextureData && null!=readPixelBuffer ;
}
public void fetchOffscreenTexture(GLDrawable drawable, GL gl) {
int readPixelSize = drawable.getWidth() * drawable.getHeight() * 3 ; // RGB
boolean newData = false;
if(readPixelSize>readPixelSizeLast) {
readPixelBuffer = GLBuffers.newDirectGLBuffer(GL.GL_UNSIGNED_BYTE, readPixelSize);
readPixelSizeLast = readPixelSize ;
try {
readTextureData = new TextureData(
gl.getGLProfile(),
// gl.isGL2GL3()?gl.GL_RGBA:gl.GL_RGB,
GL.GL_RGB,
drawable.getWidth(), drawable.getHeight(),
0,
GL.GL_RGB,
GL.GL_UNSIGNED_BYTE,
false, false,
false /* flip */,
readPixelBuffer,
null /* Flusher */);
newData = true;
} catch (Exception e) {
readTextureData = null;
readPixelBuffer = null;
readPixelSizeLast = 0;
throw new RuntimeException("can not fetch offscreen texture", e);
}
}
if(null!=readPixelBuffer) {
readPixelBuffer.clear();
gl.glReadPixels(0, 0, drawable.getWidth(), drawable.getHeight(), GL.GL_RGB, GL.GL_UNSIGNED_BYTE, readPixelBuffer);
readPixelBuffer.rewind();
if(newData) {
readTexture.updateImage(readTextureData);
} else {
readTexture.updateSubImage(readTextureData, 0,
0, 0, // src offset
0, 0, // dst offset
drawable.getWidth(), drawable.getHeight());
}
readPixelBuffer.rewind();
}
}
@SuppressWarnings("deprecation")
public void dispose() {
readTexture.dispose();
readTextureData = null;
readPixelBuffer.clear();
readPixelBuffer = null;
readPixelSizeLast = 0;
}
}
|
