//package com.adivasile;
/*
* Copyright (C) 2008 aki@akjava.com
*
* 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.
*/
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
public class OpenGLUtils {
public static FloatBuffer allocateFloatBuffer(int capacity) {
ByteBuffer vbb = ByteBuffer.allocateDirect(capacity);
vbb.order(ByteOrder.nativeOrder());
return vbb.asFloatBuffer();
}
public static IntBuffer allocateInttBuffer(int capacity) {
ByteBuffer vbb = ByteBuffer.allocateDirect(capacity);
vbb.order(ByteOrder.nativeOrder());
return vbb.asIntBuffer();
}
public static ShortBuffer allocateShortBuffer(int capacity) {
ByteBuffer vbb = ByteBuffer.allocateDirect(capacity);
vbb.order(ByteOrder.nativeOrder());
return vbb.asShortBuffer();
}
public static void addVertex3f(FloatBuffer buffer, float x, float y, float z) {
buffer.put(x);
buffer.put(y);
buffer.put(z);
}
public static void addIndex(ShortBuffer buffer, int index1, int index2,
int index3) {
buffer.put((short) index1);
buffer.put((short) index2);
buffer.put((short) index3);
}
public static void addCoord2f(FloatBuffer buffer, float x, float y) {
buffer.put(x);
buffer.put(y);
}
public static void addColorf(FloatBuffer buffer, float r, float g, float b,
float a) {
buffer.put(r);
buffer.put(g);
buffer.put(b);
buffer.put(a);
}
public static FloatBuffer toFloatBufferPositionZero(float[] values) {
ByteBuffer vbb = ByteBuffer.allocateDirect(values.length * 4);
vbb.order(ByteOrder.nativeOrder());
FloatBuffer buffer = vbb.asFloatBuffer();
buffer.put(values);
buffer.position(0);
return buffer;
}
public static ShortBuffer toShortBuffer(short[] values) {
ByteBuffer vbb = ByteBuffer.allocateDirect(values.length * 2);
vbb.order(ByteOrder.nativeOrder());
ShortBuffer buffer = vbb.asShortBuffer();
buffer.put(values);
buffer.position(0);
return buffer;
}
public static Bitmap loadBitmap(Context mContext, int id) {
InputStream is = mContext.getResources().openRawResource(id);
Bitmap bitmap = null;
try {
bitmap = BitmapFactory.decodeStream(is);
} finally {
try {
is.close();
} catch (IOException e) {
// Ignore.
}
}
return bitmap;
}
}