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
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed 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.
*/
package com.android.gallery3d.ui;
import javax.microedition.khronos.opengles.GL11;
import javax.microedition.khronos.opengles.GL11Ext;
// ExtTexture is a texture whose content comes from a external texture.
// Before drawing, setSize() should be called.
public class ExtTexture extends BasicTexture {
private static int[] sTextureId = new int[1];
private static float[] sCropRect = new float[4];
private int mTarget;
public ExtTexture(int target) {
GLId.glGenTextures(1, sTextureId, 0);
mId = sTextureId[0];
mTarget = target;
}
private void uploadToCanvas(GLCanvas canvas) {
GL11 gl = canvas.getGLInstance();
int width = getWidth();
int height = getHeight();
// Define a vertically flipped crop rectangle for OES_draw_texture.
// The four values in sCropRect are: left, bottom, width, and
// height. Negative value of width or height means flip.
sCropRect[0] = 0;
sCropRect[1] = height;
sCropRect[2] = width;
sCropRect[3] = -height;
// Set texture parameters.
gl.glBindTexture(mTarget, mId);
gl.glTexParameterfv(mTarget,
GL11Ext.GL_TEXTURE_CROP_RECT_OES, sCropRect, 0);
gl.glTexParameteri(mTarget,
GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(mTarget,
GL11.GL_TEXTURE_WRAP_T, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(mTarget,
GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
gl.glTexParameterf(mTarget,
GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
setAssociatedCanvas(canvas);
mState = STATE_LOADED;
}
@Override
protected boolean onBind(GLCanvas canvas) {
if (!isLoaded()) {
uploadToCanvas(canvas);
}
return true;
}
@Override
public int getTarget() {
return mTarget;
}
@Override
public boolean isOpaque() {
return true;
}
@Override
public void yield() {
// we cannot free the texture because we have no backup.
}
}
|
