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466450b5
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2018 Leszek Koltunski //
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// //
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46b572b5
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Leszek Koltunski
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// This file is part of Distorted. //
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466450b5
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Leszek Koltunski
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// //
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46b572b5
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Leszek Koltunski
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// Distorted is free software: you can redistribute it and/or modify //
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466450b5
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Leszek Koltunski
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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46b572b5
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Leszek Koltunski
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// Distorted is distributed in the hope that it will be useful, //
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466450b5
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Leszek Koltunski
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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46b572b5
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Leszek Koltunski
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// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
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466450b5
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library.main;
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import android.opengl.GLES31;
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import java.nio.Buffer;
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Leszek Koltunski
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.FloatBuffer;
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Implements OpenGL buffer object such as GL_ARRAY_BUFFER or GL_TRANSFORM_FEEDBACK_BUFFER.
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* Main point: deal with Android lifecycle and recreate the buffer on loss of OpenGL context.
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* <p>
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* Not part of public API, do not document (public only because has to be used in Meshes)
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*
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* @y.exclude
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*/
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Leszek Koltunski
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public class InternalBuffer extends InternalObject
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{
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public final int[] mIndex;
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Leszek Koltunski
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private int mTarget, mSize, mUsage;
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private Buffer mBuffer;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public InternalBuffer(int target, int usage)
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466450b5
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{
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super(InternalObject.TYPE_USER);
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Leszek Koltunski
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mIndex = new int[1];
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mTarget = target;
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mUsage = usage;
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Leszek Koltunski
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mBuffer = null;
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mSize = 0;
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recreate();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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Leszek Koltunski
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// must be called from a thread holding OpenGL Context.
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Leszek Koltunski
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public void createImmediately(int size, float[] buffer)
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Leszek Koltunski
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{
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Leszek Koltunski
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if( mIndex[0]<0 )
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{
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mSize= size;
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ccd98f1c
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Leszek Koltunski
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Leszek Koltunski
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if( buffer!=null )
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{
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FloatBuffer buf = ByteBuffer.allocateDirect(size).order(ByteOrder.nativeOrder()).asFloatBuffer();
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buf.put(buffer).position(0);
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mBuffer = buf;
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}
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else
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{
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mBuffer = null;
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}
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GLES31.glGenBuffers( 1, mIndex, 0);
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GLES31.glBindBuffer( mTarget, mIndex[0]);
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GLES31.glBufferData( mTarget, mSize, mBuffer, mUsage);
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GLES31.glBindBuffer( mTarget, 0);
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markWasCreatedImmediately();
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public void invalidate()
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{
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recreate();
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466450b5
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// must be called from a thread holding OpenGL Context
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void create()
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{
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if( mIndex[0]<0 )
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{
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GLES31.glGenBuffers( 1, mIndex, 0);
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GLES31.glBindBuffer( mTarget, mIndex[0]);
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GLES31.glBufferData( mTarget, mSize, mBuffer, mUsage);
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GLES31.glBindBuffer( mTarget, 0);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// must be called from a thread holding OpenGL Context
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void delete()
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{
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if( mIndex[0]>=0 )
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{
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GLES31.glDeleteBuffers(1, mIndex, 0);
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mIndex[0] = -1;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void recreate()
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{
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mIndex[0] = -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// debugging only
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String printDetails()
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{
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return getClass().getSimpleName();
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}
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}
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