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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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import android.opengl.GLES30;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Remember the OpenGL state.
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* <p>
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* This is a member of DistortedNode. Remembers the OpenGL state we want to set just before rendering
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* the Node.
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*/
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class DistortedRenderState
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{
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// TODO: figure this out dynamically; this assumes 8 bit stencil buffer.
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private static final int STENCIL_MASK = (1<<8)-1;
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private static int sColorMaskR, sColorMaskG, sColorMaskB, sColorMaskA; //
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private static int sDepthMask; //
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private static int sStencilMask; //
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private static int sDepthTest; //
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private static int sStencilTest; //
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private static int sStencilFuncFunc, sStencilFuncRef, sStencilFuncMask; // current OpenGL state
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private static int sStencilOpSfail, sStencilOpDpfail, sStencilOpDppass; //
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private static int sDepthFunc; //
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private static int sBlend; //
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private static int sBlendSrc, sBlendDst; //
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private int mColorMaskR, mColorMaskG, mColorMaskB, mColorMaskA; //
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private int mDepthMask; //
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private int mStencilMask; //
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private int mDepthTest; //
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private int mStencilTest; //
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private int mStencilFuncFunc, mStencilFuncRef, mStencilFuncMask; // The state we want to have
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private int mStencilOpSfail, mStencilOpDpfail, mStencilOpDppass; //
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private int mDepthFunc; //
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private int mBlend; //
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private int mBlendSrc, mBlendDst; //
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private int mClear; // This does not have a 'static' compatriot
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private static int rStencilTest; //
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private static int rStencilFuncFunc; //
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private static int rStencilFuncRef; // Remember values of Stencil.
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private static int rStencilFuncMask; //
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private static int rStencilMask; //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// default: color writes on, depth test and writes on, blending on, stencil off.
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DistortedRenderState()
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{
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mColorMaskR = 1;
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mColorMaskG = 1;
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mColorMaskB = 1;
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mColorMaskA = 1;
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mDepthTest = 1;
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mDepthMask = 1;
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mDepthFunc = GLES30.GL_LEQUAL;
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mBlend = 1;
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mBlendSrc = GLES30.GL_SRC_ALPHA;
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mBlendDst = GLES30.GL_ONE_MINUS_SRC_ALPHA;
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mStencilTest = 0;
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mStencilMask = STENCIL_MASK;
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mStencilFuncFunc = GLES30.GL_NEVER;
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mStencilFuncRef = 0;
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mStencilFuncMask = STENCIL_MASK;
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mStencilOpSfail = GLES30.GL_KEEP;
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mStencilOpDpfail = GLES30.GL_KEEP;
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mStencilOpDppass = GLES30.GL_KEEP;
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mClear = 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// reset state of everything to 'unknown'
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static void reset()
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{
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sColorMaskR = -1;
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sColorMaskG = -1;
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sColorMaskB = -1;
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sColorMaskA = -1;
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sDepthTest = -1;
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sDepthMask = -1;
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sDepthFunc = -1;
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sBlend = -1;
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sBlendSrc = -1;
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sBlendDst = -1;
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sStencilTest = -1;
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sStencilMask = -1;
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sStencilFuncFunc = -1;
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sStencilFuncRef = -1;
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sStencilFuncMask = -1;
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sStencilOpSfail = -1;
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sStencilOpDpfail = -1;
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sStencilOpDppass = -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void colorDepthStencilOn()
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{
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if( sColorMaskR!=1 || sColorMaskG!=1 || sColorMaskB!=1 || sColorMaskA!=1 )
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{
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sColorMaskR = 1;
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sColorMaskG = 1;
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sColorMaskB = 1;
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sColorMaskA = 1;
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GLES30.glColorMask(true,true,true,true);
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}
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if( sDepthMask!=1 )
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{
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sDepthMask = 1;
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GLES30.glDepthMask(true);
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}
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if( sStencilMask!= STENCIL_MASK )
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{
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sStencilMask = STENCIL_MASK;
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GLES30.glStencilMask(sStencilMask);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void switchOffDrawing()
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{
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GLES30.glEnable(GLES30.GL_SCISSOR_TEST);
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GLES30.glScissor(0,0,0,0);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void restoreDrawing()
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{
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GLES30.glDisable(GLES30.GL_SCISSOR_TEST);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void setUpStencilMark()
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{
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if( sStencilTest!=1 )
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{
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sStencilTest = 1;
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//android.util.Log.d("State", "stencil test on");
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GLES30.glEnable(GLES30.GL_STENCIL_TEST);
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}
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if( sStencilFuncFunc!=GLES30.GL_ALWAYS || sStencilFuncRef!=1 || sStencilFuncMask!=STENCIL_MASK )
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{
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sStencilFuncFunc = GLES30.GL_ALWAYS;
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sStencilFuncRef = 1;
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sStencilFuncMask = STENCIL_MASK;
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//android.util.Log.d("State", "stencil func on");
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GLES30.glStencilFunc(sStencilFuncFunc,sStencilFuncRef,sStencilFuncMask);
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}
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if( sStencilOpSfail!=GLES30.GL_KEEP || sStencilOpDpfail!=GLES30.GL_KEEP || sStencilOpDppass!=GLES30.GL_REPLACE )
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{
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sStencilOpSfail = GLES30.GL_KEEP;
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sStencilOpDpfail= GLES30.GL_KEEP;
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sStencilOpDppass= GLES30.GL_REPLACE;
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//android.util.Log.d("State", "stencil op on");
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GLES30.glStencilOp(sStencilOpSfail,sStencilOpDpfail,sStencilOpDppass);
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}
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if( sColorMaskR!=0 || sColorMaskG!=0 || sColorMaskB!=0 || sColorMaskA!=0 )
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{
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sColorMaskR = 0;
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sColorMaskG = 0;
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sColorMaskB = 0;
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sColorMaskA = 0;
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//android.util.Log.d("State", "switch off color writing");
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GLES30.glColorMask(false,false,false,false);
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}
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if( sDepthMask!=0 )
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{
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sDepthMask = 0;
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//android.util.Log.d("State", "switch off depth writing");
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GLES30.glDepthMask(false);
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}
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if( sStencilMask!= STENCIL_MASK )
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{
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sStencilMask = STENCIL_MASK;
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//android.util.Log.d("State", "stencil mask on");
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GLES30.glStencilMask(sStencilMask);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void useStencilMark()
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{
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if( sStencilTest!=1 )
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{
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rStencilTest = sStencilTest;
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sStencilTest = 1;
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GLES30.glEnable(GLES30.GL_STENCIL_TEST);
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}
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if( sStencilFuncFunc!=GLES30.GL_EQUAL || sStencilFuncRef!=1 || sStencilFuncMask!=STENCIL_MASK )
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{
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rStencilFuncFunc = sStencilFuncFunc;
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rStencilFuncRef = sStencilFuncRef;
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rStencilFuncMask = sStencilFuncMask;
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sStencilFuncFunc = GLES30.GL_EQUAL;
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sStencilFuncRef = 1;
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sStencilFuncMask = STENCIL_MASK;
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GLES30.glStencilFunc(sStencilFuncFunc,sStencilFuncRef,sStencilFuncMask);
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}
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// TODO: Debatable
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if( sStencilMask!= 0x00 )
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{
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rStencilMask = sStencilMask;
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sStencilMask = 0x00;
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GLES30.glStencilMask(sStencilMask);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void unuseStencilMark()
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{
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if( rStencilTest!=sStencilTest )
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{
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sStencilTest = rStencilTest;
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if (sStencilTest == 0)
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{
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GLES30.glDisable(GLES30.GL_STENCIL_TEST);
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}
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else
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{
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GLES30.glEnable(GLES30.GL_STENCIL_TEST);
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}
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}
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if( rStencilFuncFunc!=sStencilFuncFunc || rStencilFuncRef!=sStencilFuncRef || rStencilFuncMask!=sStencilFuncMask )
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{
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sStencilFuncFunc = rStencilFuncFunc;
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sStencilFuncRef = rStencilFuncRef ;
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sStencilFuncMask = rStencilFuncMask;
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GLES30.glStencilFunc(sStencilFuncFunc,sStencilFuncRef,sStencilFuncMask);
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}
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if( rStencilMask!=sStencilMask )
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{
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sStencilMask = rStencilMask;
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GLES30.glStencilMask(sStencilMask);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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void apply()
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{
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//android.util.Log.e("State", "APPLYING STATE");
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/////////////////////////////////////////////////////
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// 1. Write to color buffer?
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if( mColorMaskR!=sColorMaskR || mColorMaskG!=sColorMaskG || mColorMaskB!=sColorMaskB || mColorMaskA!=sColorMaskA)
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{
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//android.util.Log.d("State", "setting color mask");
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sColorMaskR = mColorMaskR;
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sColorMaskG = mColorMaskG;
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sColorMaskB = mColorMaskB;
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sColorMaskA = mColorMaskA;
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GLES30.glColorMask(sColorMaskR==1,sColorMaskG==1,sColorMaskB==1,sColorMaskA==1);
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}
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/////////////////////////////////////////////////////
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// 2. Enable Depth test?
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if( mDepthTest!=sDepthTest )
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{
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sDepthTest = mDepthTest;
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if (sDepthTest == 0)
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{
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//android.util.Log.d("State", "disabling depth test");
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GLES30.glDisable(GLES30.GL_DEPTH_TEST);
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}
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else
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{
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//android.util.Log.d("State", "enable depth test");
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GLES30.glEnable(GLES30.GL_DEPTH_TEST);
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}
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}
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/////////////////////////////////////////////////////
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// 3. Change Depth Function?
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if( mDepthFunc!=sDepthFunc )
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{
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//android.util.Log.d("State", "setting depth func");
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sDepthFunc = mDepthFunc;
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GLES30.glDepthFunc(sDepthFunc);
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}
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/////////////////////////////////////////////////////
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// 4. Write to Depth buffer?
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if( mDepthMask!=sDepthMask )
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{
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//android.util.Log.d("State", "setting depth mask");
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sDepthMask = mDepthMask;
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GLES30.glDepthMask(sDepthMask==1);
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}
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/////////////////////////////////////////////////////
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// 5. Enable Blending?
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if( mBlend!=sBlend )
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{
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sBlend = mBlend;
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if (sBlend == 0)
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{
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//android.util.Log.d("State", "disabling blending");
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GLES30.glDisable(GLES30.GL_BLEND);
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}
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else
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{
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//android.util.Log.d("State", "enabling blending");
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GLES30.glEnable(GLES30.GL_BLEND);
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}
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}
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/////////////////////////////////////////////////////
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// 6. Change Blend function?
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if( mBlendSrc!=sBlendSrc || mBlendDst!=sBlendDst )
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{
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//android.util.Log.d("State", "setting blend function");
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sBlendSrc = mBlendSrc;
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sBlendDst = mBlendDst;
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GLES30.glBlendFunc(sBlendSrc,sBlendDst);
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}
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/////////////////////////////////////////////////////
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// 7. Enable/Disable Stencil Test?
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if( mStencilTest!=sStencilTest )
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{
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sStencilTest = mStencilTest;
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361
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362
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if (sStencilTest == 0)
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{
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//android.util.Log.d("State", "disabling stencil test");
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GLES30.glDisable(GLES30.GL_STENCIL_TEST);
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}
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else
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{
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//android.util.Log.d("State", "enabling stencil test");
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GLES30.glEnable(GLES30.GL_STENCIL_TEST);
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}
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}
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373
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374
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/////////////////////////////////////////////////////
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375
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// 8. Adjust Stencil function?
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376
|
if( mStencilFuncFunc!=sStencilFuncFunc || mStencilFuncRef!=sStencilFuncRef || mStencilFuncMask!=sStencilFuncMask )
|
|
377
|
{
|
|
378
|
//android.util.Log.d("State", "setting stencil function");
|
|
379
|
sStencilFuncFunc = mStencilFuncFunc;
|
|
380
|
sStencilFuncRef = mStencilFuncRef ;
|
|
381
|
sStencilFuncMask = mStencilFuncMask;
|
|
382
|
GLES30.glStencilFunc(sStencilFuncFunc,sStencilFuncRef,sStencilFuncMask);
|
|
383
|
}
|
|
384
|
|
|
385
|
/////////////////////////////////////////////////////
|
|
386
|
// 9. Adjust Stencil operation?
|
|
387
|
if( mStencilOpSfail!=sStencilOpSfail || mStencilOpDpfail!=sStencilOpDpfail || mStencilOpDppass!=sStencilOpDppass )
|
|
388
|
{
|
|
389
|
//android.util.Log.d("State", "setting stencil op");
|
|
390
|
sStencilOpSfail = mStencilOpSfail;
|
|
391
|
sStencilOpDpfail= mStencilOpDpfail;
|
|
392
|
sStencilOpDppass= mStencilOpDppass;
|
|
393
|
GLES30.glStencilOp(sStencilOpSfail,sStencilOpDpfail,sStencilOpDppass);
|
|
394
|
}
|
|
395
|
|
|
396
|
/////////////////////////////////////////////////////
|
|
397
|
// 10. Write to Stencil buffer?
|
|
398
|
if( mStencilMask!=sStencilMask )
|
|
399
|
{
|
|
400
|
//android.util.Log.d("State", "setting stencil mask");
|
|
401
|
sStencilMask = mStencilMask;
|
|
402
|
GLES30.glStencilMask(sStencilMask);
|
|
403
|
}
|
|
404
|
|
|
405
|
/////////////////////////////////////////////////////
|
|
406
|
// 11. Clear buffers?
|
|
407
|
if( mClear!=0 )
|
|
408
|
{
|
|
409
|
//android.util.Log.d("State", "clearing buffer");
|
|
410
|
GLES30.glClear(mClear);
|
|
411
|
}
|
|
412
|
}
|
|
413
|
|
|
414
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
415
|
|
|
416
|
void glColorMask(boolean r, boolean g, boolean b, boolean a)
|
|
417
|
{
|
|
418
|
mColorMaskR = (r ? 1:0);
|
|
419
|
mColorMaskG = (g ? 1:0);
|
|
420
|
mColorMaskB = (b ? 1:0);
|
|
421
|
mColorMaskA = (a ? 1:0);
|
|
422
|
}
|
|
423
|
|
|
424
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
425
|
|
|
426
|
void glDepthMask(boolean mask)
|
|
427
|
{
|
|
428
|
mDepthMask = (mask ? 1:0);
|
|
429
|
}
|
|
430
|
|
|
431
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
432
|
|
|
433
|
void glStencilMask(int mask)
|
|
434
|
{
|
|
435
|
mStencilMask = mask;
|
|
436
|
}
|
|
437
|
|
|
438
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
439
|
|
|
440
|
void glEnable(int test)
|
|
441
|
{
|
|
442
|
if( test==GLES30.GL_DEPTH_TEST ) mDepthTest = 1;
|
|
443
|
else if( test==GLES30.GL_STENCIL_TEST ) mStencilTest = 1;
|
|
444
|
else if( test==GLES30.GL_BLEND ) mBlend = 1;
|
|
445
|
}
|
|
446
|
|
|
447
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
448
|
|
|
449
|
void glDisable(int test)
|
|
450
|
{
|
|
451
|
if( test==GLES30.GL_DEPTH_TEST ) mDepthTest = 0;
|
|
452
|
else if( test==GLES30.GL_STENCIL_TEST ) mStencilTest = 0;
|
|
453
|
else if( test==GLES30.GL_BLEND ) mBlend = 0;
|
|
454
|
}
|
|
455
|
|
|
456
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
457
|
|
|
458
|
void glStencilFunc(int func, int ref, int mask)
|
|
459
|
{
|
|
460
|
mStencilFuncFunc = func;
|
|
461
|
mStencilFuncRef = ref;
|
|
462
|
mStencilFuncMask = mask;
|
|
463
|
}
|
|
464
|
|
|
465
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
466
|
|
|
467
|
void glStencilOp(int sfail, int dpfail, int dppass)
|
|
468
|
{
|
|
469
|
mStencilOpSfail = sfail;
|
|
470
|
mStencilOpDpfail= dpfail;
|
|
471
|
mStencilOpDppass= dppass;
|
|
472
|
}
|
|
473
|
|
|
474
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
475
|
|
|
476
|
void glDepthFunc(int func)
|
|
477
|
{
|
|
478
|
mDepthFunc = func;
|
|
479
|
}
|
|
480
|
|
|
481
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
482
|
|
|
483
|
void glBlendFunc(int src, int dst)
|
|
484
|
{
|
|
485
|
mBlendSrc = src;
|
|
486
|
mBlendDst = dst;
|
|
487
|
}
|
|
488
|
|
|
489
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
490
|
|
|
491
|
void glClear(int mask)
|
|
492
|
{
|
|
493
|
mClear = mask;
|
|
494
|
}
|
|
495
|
}
|