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f6fb3c6d
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Leszek Koltunski //
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// //
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// This file is part of Distorted. //
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// //
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// Distorted is free software: you can redistribute it and/or modify //
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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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// Distorted is distributed in the hope that it will be useful, //
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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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// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library;
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194ab46f
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Leszek Koltunski
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import android.opengl.GLES30;
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f6fb3c6d
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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dedacd82
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Leszek Koltunski
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/**
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* Class which represents a OpenGL Framebuffer object.
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71c3fecc
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Leszek Koltunski
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* <p>
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c5369f1b
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leszek
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* User is able to create offscreen FBOs and both a) render to them b) use their COLOR0 attachment as
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* an input texture.
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dedacd82
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Leszek Koltunski
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*/
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af4cc5db
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Leszek Koltunski
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public class DistortedFramebuffer extends DistortedOutputSurface implements DistortedInputSurface
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Leszek Koltunski
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{
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Leszek Koltunski
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private int[] mDepthH = new int[1];
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private int[] mFBOH = new int[1];
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cdd5e827
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Leszek Koltunski
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private boolean mDepthEnabled;
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bd3da5b2
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Leszek Koltunski
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f6fb3c6d
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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6537ba91
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Leszek Koltunski
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// Must be called from a thread holding OpenGL Context
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227ac49a
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Leszek Koltunski
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// Watch out - this has the side-effect of binding a Texture and a Framebuffer!
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f6fb3c6d
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Leszek Koltunski
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c5369f1b
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leszek
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public void create()
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f6fb3c6d
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Leszek Koltunski
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{
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133cbb2b
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Leszek Koltunski
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if( mColorH[0]==NOT_CREATED_YET )
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7cf783cb
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Leszek Koltunski
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{
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133cbb2b
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Leszek Koltunski
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GLES30.glGenTextures(1, mColorH, 0);
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GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
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194ab46f
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Leszek Koltunski
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GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_REPEAT);
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GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_REPEAT);
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GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
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GLES30.glTexParameterf(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR);
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Leszek Koltunski
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GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_RGBA, mSizeX, mSizeY, 0, GLES30.GL_RGBA, GLES30.GL_UNSIGNED_BYTE, null);
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GLES30.glGenFramebuffers(1, mFBOH, 0);
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GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
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GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, mColorH[0], 0);
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dedacd82
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checkStatus("color");
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7cf783cb
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}
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if( mDepthEnabled && mDepthH[0]==NOT_CREATED_YET ) // we need to create a new DEPTH attachment
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{
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GLES30.glGenTextures(1, mDepthH, 0);
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GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mDepthH[0]);
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GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_REPEAT);
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GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_REPEAT);
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GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MIN_FILTER, GLES30.GL_NEAREST);
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GLES30.glTexParameteri(GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_NEAREST);
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133cbb2b
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GLES30.glTexImage2D(GLES30.GL_TEXTURE_2D, 0, GLES30.GL_DEPTH_COMPONENT, mSizeX, mSizeY, 0, GLES30.GL_DEPTH_COMPONENT, GLES30.GL_UNSIGNED_SHORT, null);
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GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
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GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_DEPTH_ATTACHMENT, GLES30.GL_TEXTURE_2D, mDepthH[0], 0);
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8c327653
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Leszek Koltunski
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checkStatus("depth");
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Leszek Koltunski
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}
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133cbb2b
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Leszek Koltunski
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if( !mDepthEnabled && mDepthH[0]!=NOT_CREATED_YET ) // we need to detach and destroy the DEPTH attachment.
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8c327653
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Leszek Koltunski
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{
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133cbb2b
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Leszek Koltunski
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GLES30.glDeleteTextures(1, mDepthH, 0);
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mDepthH[0]=NOT_CREATED_YET;
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8c327653
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Leszek Koltunski
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}
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8337fa41
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private boolean checkStatus(String message)
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{
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194ab46f
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Leszek Koltunski
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int status = GLES30.glCheckFramebufferStatus(GLES30.GL_FRAMEBUFFER);
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8337fa41
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194ab46f
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if(status != GLES30.GL_FRAMEBUFFER_COMPLETE)
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{
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android.util.Log.e("DistortedFramebuffer", "FRAMEBUFFER INCOMPLETE, "+message+" error="+status);
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133cbb2b
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Leszek Koltunski
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GLES30.glDeleteTextures(1, mColorH, 0);
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GLES30.glDeleteTextures(1, mDepthH, 0);
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GLES30.glDeleteFramebuffers(1, mFBOH, 0);
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mFBOH[0] = 0;
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mColorH[0] = FAILED_TO_CREATE;
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mDepthH[0] = FAILED_TO_CREATE;
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8337fa41
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Leszek Koltunski
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return false;
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}
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f6fb3c6d
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return true;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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6537ba91
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Leszek Koltunski
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// Must be called from a thread holding OpenGL Context
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f6fb3c6d
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Leszek Koltunski
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227ac49a
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Leszek Koltunski
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void delete()
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f6fb3c6d
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Leszek Koltunski
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{
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133cbb2b
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Leszek Koltunski
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if( mColorH[0]>=0 )
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e6cf7d50
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Leszek Koltunski
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{
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133cbb2b
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Leszek Koltunski
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if( mDepthH[0]>=0 )
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8c327653
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Leszek Koltunski
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{
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133cbb2b
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Leszek Koltunski
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GLES30.glDeleteTextures(1, mDepthH, 0);
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mDepthH[0]=NOT_CREATED_YET;
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8c327653
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Leszek Koltunski
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}
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133cbb2b
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Leszek Koltunski
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GLES30.glDeleteTextures(1, mColorH, 0);
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mColorH[0] = NOT_CREATED_YET;
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bd3da5b2
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Leszek Koltunski
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133cbb2b
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Leszek Koltunski
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GLES30.glDeleteFramebuffers(1, mFBOH, 0);
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mFBOH[0] = 0;
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e6cf7d50
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Leszek Koltunski
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}
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bd3da5b2
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Leszek Koltunski
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}
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4ebbb17a
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// called from onDestroy(); mark OpenGL assets as 'not created'
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void destroy()
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{
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if( mColorH[0]!=DONT_CREATE ) mColorH[0] = NOT_CREATED_YET;
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if( mDepthEnabled ) mDepthH[0] = NOT_CREATED_YET;
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}
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86eb00a9
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// if new size fits into the size of the underlying Texture, just change the projection without
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// reallocating the Texture. Otherwise, we need to reallocate.
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//
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af4cc5db
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Leszek Koltunski
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// Must be called from a thread holding the OpenGL context.
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86eb00a9
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Leszek Koltunski
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void resizeFast(int width, int height)
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{
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af4cc5db
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Leszek Koltunski
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if( mWidth!=width || mHeight!=height )
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86eb00a9
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Leszek Koltunski
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{
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af4cc5db
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Leszek Koltunski
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mWidth = width;
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mHeight= height;
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createProjection();
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c5369f1b
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leszek
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if( width> mSizeX || height> mSizeY)
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86eb00a9
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Leszek Koltunski
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{
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c5369f1b
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leszek
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mSizeX = width;
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mSizeY = height;
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133cbb2b
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Leszek Koltunski
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delete();
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86eb00a9
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Leszek Koltunski
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}
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}
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cc0734e7
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Leszek Koltunski
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133cbb2b
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Leszek Koltunski
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create();
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86eb00a9
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Leszek Koltunski
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}
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f6fb3c6d
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// PUBLIC API
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dedacd82
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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cdd5e827
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Leszek Koltunski
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/**
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* Create a new offscreen Framebuffer.
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*
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* @param width Width of the COLOR attachment.
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* @param height Height of the COLOR attachment.
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* @param depthEnabled Add DEPTH attachment?
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*/
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@SuppressWarnings("unused")
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public DistortedFramebuffer(int width, int height, boolean depthEnabled)
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{
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2e49718d
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Leszek Koltunski
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super(width,height,NOT_CREATED_YET);
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cdd5e827
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Leszek Koltunski
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mDepthEnabled= depthEnabled;
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2e49718d
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Leszek Koltunski
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mFBOH[0] = NOT_CREATED_YET;
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mDepthH[0] = NOT_CREATED_YET;
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cdd5e827
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Leszek Koltunski
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}
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133cbb2b
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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dedacd82
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Leszek Koltunski
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/**
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57578636
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Leszek Koltunski
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* Create a new offscreen Framebuffer.
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dedacd82
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Leszek Koltunski
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*
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* @param width Width of the COLOR attachment.
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* @param height Height of the COLOR attachment.
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*/
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1942537e
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Leszek Koltunski
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@SuppressWarnings("unused")
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ed13a5de
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Leszek Koltunski
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public DistortedFramebuffer(int width, int height)
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f6fb3c6d
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Leszek Koltunski
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{
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| 189 |
2e49718d
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super(width,height,NOT_CREATED_YET);
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cdd5e827
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Leszek Koltunski
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mDepthEnabled= false;
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2e49718d
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Leszek Koltunski
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mFBOH[0] = NOT_CREATED_YET;
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mDepthH[0] = NOT_CREATED_YET;
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| 193 |
f6fb3c6d
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Leszek Koltunski
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}
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b448e6b9
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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dedacd82
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Leszek Koltunski
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/**
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c5369f1b
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leszek
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* Bind the underlying rectangle of pixels as a OpenGL Texture.
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af4cc5db
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Leszek Koltunski
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*
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* @returns <code>true</code> if successful.
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| 200 |
dedacd82
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Leszek Koltunski
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*/
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c5369f1b
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leszek
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public boolean setAsInput()
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| 202 |
b448e6b9
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Leszek Koltunski
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{
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| 203 |
c5369f1b
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leszek
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if( mColorH[0]>0 )
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{
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GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, mColorH[0]);
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return true;
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}
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return false;
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}
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2e49718d
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Leszek Koltunski
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c5369f1b
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leszek
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Bind this Surface as a Framebuffer we can render to.
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*/
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public void setAsOutput()
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{
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GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);
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| 219 |
b448e6b9
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Leszek Koltunski
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c5369f1b
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leszek
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if( mDepthH[0]!=NOT_CREATED_YET )
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{
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GLES30.glEnable(GLES30.GL_DEPTH_TEST);
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GLES30.glDepthMask(true);
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}
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else
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{
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GLES30.glDisable(GLES30.GL_DEPTH_TEST);
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GLES30.glDepthMask(false);
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}
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| 230 |
8c327653
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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| 234 |
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* Create a new DEPTH buffer and attach it or (param=false) detach an existing DEPTh attachment and destroy it.
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*
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| 236 |
cdd5e827
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Leszek Koltunski
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* @param enable <bold>true</bold> if we want to attach a new DEPTH buffer to the FBO.<br>
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* <bold>false</bold> if we want to detach the DEPTH attachment.
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| 238 |
8c327653
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Leszek Koltunski
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*/
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| 239 |
cdd5e827
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Leszek Koltunski
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public void enableDepthAttachment(boolean enable)
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| 240 |
8c327653
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Leszek Koltunski
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{
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| 241 |
cdd5e827
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Leszek Koltunski
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mDepthEnabled = enable;
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| 242 |
b448e6b9
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Leszek Koltunski
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}
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| 243 |
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| 244 |
d1e740c5
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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| 245 |
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/**
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| 246 |
09d4f4b1
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Leszek Koltunski
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* Return the ID of the Texture (COLOR attachment 0) that's backing this FBO.
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| 247 |
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* <p>
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| 248 |
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* Catch: this will only work if the library has had time to actually create the texture. Remember
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| 249 |
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* that the texture gets created only on first render, thus creating a Texture object and immediately
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| 250 |
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* calling this method will return an invalid (negative) result.
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| 251 |
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*
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| 252 |
ab12f06b
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Leszek Koltunski
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* @return If there was not a single render between creation of the Object and calling this method on
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| 253 |
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* it, return a negative value. Otherwise, return ID of COLOR attachment 0.
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| 254 |
d1e740c5
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Leszek Koltunski
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*/
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public int getTextureID()
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| 256 |
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{
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return mColorH[0];
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| 258 |
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}
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| 259 |
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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| 262 |
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* Return true if the FBO contains a DEPTH attachment.
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| 263 |
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*
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* @return <bold>true</bold> if the FBO contains a DEPTH attachment.
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| 265 |
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*/
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public boolean hasDepth()
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| 267 |
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{
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| 268 |
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return mDepthEnabled;
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}
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}
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