GLES20TextureLayer.java revision 846a533945576e5cb1a66529ca3a52d71749f04f 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.view;
18
19import android.graphics.Canvas;
20import android.graphics.Matrix;
21import android.graphics.Rect;
22import android.graphics.SurfaceTexture;
23
24/**
25 * An OpenGL ES 2.0 implementation of {@link HardwareLayer}. This
26 * implementation can be used as a texture. Rendering into this
27 * layer is not controlled by a {@link HardwareCanvas}.
28 */
29class GLES20TextureLayer extends GLES20Layer {
30    private int mTexture;
31    private SurfaceTexture mSurface;
32
33    GLES20TextureLayer(boolean isOpaque) {
34        int[] layerInfo = new int[2];
35        mLayer = GLES20Canvas.nCreateTextureLayer(isOpaque, layerInfo);
36
37        if (mLayer != 0) {
38            mTexture = layerInfo[0];
39            mFinalizer = new Finalizer(mLayer);
40        } else {
41            mFinalizer = null;
42        }
43    }
44
45    @Override
46    boolean isValid() {
47        return mLayer != 0 && mTexture != 0;
48    }
49
50    @Override
51    void resize(int width, int height) {
52    }
53
54    @Override
55    HardwareCanvas getCanvas() {
56        return null;
57    }
58
59    @Override
60    HardwareCanvas start(Canvas currentCanvas) {
61        return null;
62    }
63
64    @Override
65    void end(Canvas currentCanvas) {
66    }
67
68    SurfaceTexture getSurfaceTexture() {
69        if (mSurface == null) {
70            mSurface = new SurfaceTexture(mTexture, false);
71        }
72        return mSurface;
73    }
74
75    void setSurfaceTexture(SurfaceTexture surfaceTexture) {
76        if (mSurface != null) {
77            mSurface.release();
78        }
79        mSurface = surfaceTexture;
80        mSurface.attachToGLContext(mTexture);
81    }
82
83    @Override
84    void update(int width, int height, boolean isOpaque) {
85        super.update(width, height, isOpaque);
86        GLES20Canvas.nUpdateTextureLayer(mLayer, width, height, isOpaque, mSurface);
87    }
88
89    @Override
90    void setOpaque(boolean isOpaque) {
91        throw new UnsupportedOperationException("Use update(int, int, boolean) instead");
92    }
93
94    @Override
95    void setTransform(Matrix matrix) {
96        GLES20Canvas.nSetTextureLayerTransform(mLayer, matrix.native_instance);
97    }
98
99    @Override
100    void redraw(DisplayList displayList, Rect dirtyRect) {
101    }
102}
103