1/*
2 * Copyright (C) 2007 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 com.example.android.apis.graphics.spritetext;
18
19import javax.microedition.khronos.opengles.GL10;
20
21class MatrixGrabber {
22    public MatrixGrabber() {
23        mModelView = new float[16];
24        mProjection = new float[16];
25    }
26
27    /**
28     * Record the current modelView and projection matrix state.
29     * Has the side effect of setting the current matrix state to GL_MODELVIEW
30     * @param gl
31     */
32    public void getCurrentState(GL10 gl) {
33        getCurrentProjection(gl);
34        getCurrentModelView(gl);
35    }
36
37    /**
38     * Record the current modelView matrix state. Has the side effect of
39     * setting the current matrix state to GL_MODELVIEW
40     * @param gl
41     */
42    public void getCurrentModelView(GL10 gl) {
43        getMatrix(gl, GL10.GL_MODELVIEW, mModelView);
44    }
45
46    /**
47     * Record the current projection matrix state. Has the side effect of
48     * setting the current matrix state to GL_PROJECTION
49     * @param gl
50     */
51    public void getCurrentProjection(GL10 gl) {
52        getMatrix(gl, GL10.GL_PROJECTION, mProjection);
53    }
54
55    private void getMatrix(GL10 gl, int mode, float[] mat) {
56        MatrixTrackingGL gl2 = (MatrixTrackingGL) gl;
57        gl2.glMatrixMode(mode);
58        gl2.getMatrix(mat, 0);
59    }
60
61    public float[] mModelView;
62    public float[] mProjection;
63}
64