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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 class RenderState
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{
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private int colorMaskR, colorMaskG, colorMaskB, colorMaskA;
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private int depthMask;
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private int stencilMask;
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private int depthTest;
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private int stencilTest;
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private int stencilFuncFunc, stencilFuncRef, stencilFuncMask;
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private int stencilOpSfail, stencilOpDpfail, stencilOpDppass;
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private int depthFunc;
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private int blend;
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private int blendSrc, blendDst;
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}
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private RenderState mState; // state the current object wants to have
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static private RenderState cState = new RenderState(); // current OpenGL Stave
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static private RenderState sState = new RenderState(); // saved OpenGL state
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private int mClear;
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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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mState = new RenderState();
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mState.colorMaskR = 1;
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mState.colorMaskG = 1;
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mState.colorMaskB = 1;
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mState.colorMaskA = 1;
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mState.depthTest = 1;
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mState.depthMask = 1;
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mState.depthFunc = GLES30.GL_LEQUAL;
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mState.blend = 1;
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mState.blendSrc = GLES30.GL_SRC_ALPHA;
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mState.blendDst = GLES30.GL_ONE_MINUS_SRC_ALPHA;
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mState.stencilTest = 0;
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mState.stencilMask = STENCIL_MASK;
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mState.stencilFuncFunc = GLES30.GL_NEVER;
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mState.stencilFuncRef = 0;
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mState.stencilFuncMask = STENCIL_MASK;
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mState.stencilOpSfail = GLES30.GL_KEEP;
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mState.stencilOpDpfail = GLES30.GL_KEEP;
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mState.stencilOpDppass = 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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cState.colorMaskR = -1;
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cState.colorMaskG = -1;
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cState.colorMaskB = -1;
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cState.colorMaskA = -1;
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cState.depthTest = -1;
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cState.depthMask = -1;
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cState.depthFunc = -1;
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cState.blend = -1;
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cState.blendSrc = -1;
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cState.blendDst = -1;
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cState.stencilTest = -1;
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cState.stencilMask = -1;
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cState.stencilFuncFunc = -1;
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cState.stencilFuncRef = -1;
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cState.stencilFuncMask = -1;
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cState.stencilOpSfail = -1;
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cState.stencilOpDpfail = -1;
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cState.stencilOpDppass = -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( cState.colorMaskR!=1 || cState.colorMaskG!=1 || cState.colorMaskB!=1 || cState.colorMaskA!=1 )
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{
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cState.colorMaskR = 1;
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cState.colorMaskG = 1;
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cState.colorMaskB = 1;
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cState.colorMaskA = 1;
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GLES30.glColorMask(true,true,true,true);
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}
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if( cState.depthMask!=1 )
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{
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cState.depthMask = 1;
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GLES30.glDepthMask(true);
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}
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if( cState.stencilMask!= STENCIL_MASK )
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{
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cState.stencilMask = STENCIL_MASK;
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GLES30.glStencilMask(cState.stencilMask);
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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( cState.stencilTest!=1 )
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{
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cState.stencilTest = 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( cState.stencilFuncFunc!=GLES30.GL_ALWAYS || cState.stencilFuncRef!=1 || cState.stencilFuncMask!=STENCIL_MASK )
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{
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cState.stencilFuncFunc = GLES30.GL_ALWAYS;
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cState.stencilFuncRef = 1;
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cState.stencilFuncMask = STENCIL_MASK;
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//android.util.Log.d("State", "stencil func on");
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GLES30.glStencilFunc(cState.stencilFuncFunc,cState.stencilFuncRef,cState.stencilFuncMask);
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}
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if( cState.stencilOpSfail!=GLES30.GL_KEEP || cState.stencilOpDpfail!=GLES30.GL_KEEP || cState.stencilOpDppass!=GLES30.GL_REPLACE )
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{
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cState.stencilOpSfail = GLES30.GL_KEEP;
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cState.stencilOpDpfail= GLES30.GL_KEEP;
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cState.stencilOpDppass= GLES30.GL_REPLACE;
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//android.util.Log.d("State", "stencil op on");
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GLES30.glStencilOp(cState.stencilOpSfail,cState.stencilOpDpfail,cState.stencilOpDppass);
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}
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if( cState.colorMaskR!=0 || cState.colorMaskG!=0 || cState.colorMaskB!=0 || cState.colorMaskA!=0 )
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{
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cState.colorMaskR = 0;
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cState.colorMaskG = 0;
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cState.colorMaskB = 0;
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cState.colorMaskA = 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( cState.depthMask!=0 )
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{
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cState.depthMask = 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( cState.stencilMask!= STENCIL_MASK )
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{
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cState.stencilMask = STENCIL_MASK;
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//android.util.Log.d("State", "stencil mask on");
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GLES30.glStencilMask(cState.stencilMask);
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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( cState.stencilTest!=1 )
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{
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sState.stencilTest = cState.stencilTest;
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cState.stencilTest = 1;
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GLES30.glEnable(GLES30.GL_STENCIL_TEST);
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}
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if( cState.stencilFuncFunc!=GLES30.GL_EQUAL || cState.stencilFuncRef!=1 || cState.stencilFuncMask!=STENCIL_MASK )
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{
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sState.stencilFuncFunc = cState.stencilFuncFunc;
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sState.stencilFuncRef = cState.stencilFuncRef;
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sState.stencilFuncMask = cState.stencilFuncMask;
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cState.stencilFuncFunc = GLES30.GL_EQUAL;
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cState.stencilFuncRef = 1;
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cState.stencilFuncMask = STENCIL_MASK;
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GLES30.glStencilFunc(cState.stencilFuncFunc,cState.stencilFuncRef,cState.stencilFuncMask);
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}
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// TODO: Debatable
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if( cState.stencilMask!= 0x00 )
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{
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sState.stencilMask = cState.stencilMask;
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cState.stencilMask = 0x00;
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GLES30.glStencilMask(cState.stencilMask);
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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( sState.stencilTest!=cState.stencilTest )
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{
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cState.stencilTest = sState.stencilTest;
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if (cState.stencilTest == 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( sState.stencilFuncFunc!=cState.stencilFuncFunc || sState.stencilFuncRef!=cState.stencilFuncRef || sState.stencilFuncMask!=cState.stencilFuncMask )
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{
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cState.stencilFuncFunc = sState.stencilFuncFunc;
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cState.stencilFuncRef = sState.stencilFuncRef ;
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cState.stencilFuncMask = sState.stencilFuncMask;
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GLES30.glStencilFunc(cState.stencilFuncFunc,cState.stencilFuncRef,cState.stencilFuncMask);
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}
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if( sState.stencilMask!=cState.stencilMask )
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{
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cState.stencilMask = sState.stencilMask;
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GLES30.glStencilMask(cState.stencilMask);
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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( mState.colorMaskR!=cState.colorMaskR || mState.colorMaskG!=cState.colorMaskG || mState.colorMaskB!=cState.colorMaskB || mState.colorMaskA!=cState.colorMaskA)
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{
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//android.util.Log.d("State", "setting color mask");
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cState.colorMaskR = mState.colorMaskR;
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cState.colorMaskG = mState.colorMaskG;
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cState.colorMaskB = mState.colorMaskB;
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cState.colorMaskA = mState.colorMaskA;
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GLES30.glColorMask(cState.colorMaskR==1,cState.colorMaskG==1,cState.colorMaskB==1,cState.colorMaskA==1);
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}
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/////////////////////////////////////////////////////
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// 2. Enable Depth test?
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if( mState.depthTest!=cState.depthTest )
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{
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cState.depthTest = mState.depthTest;
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if (cState.depthTest == 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( mState.depthFunc!=cState.depthFunc )
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{
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//android.util.Log.d("State", "setting depth func");
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cState.depthFunc = mState.depthFunc;
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GLES30.glDepthFunc(cState.depthFunc);
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}
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/////////////////////////////////////////////////////
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// 4. Write to Depth buffer?
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if( mState.depthMask!=cState.depthMask )
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{
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//android.util.Log.d("State", "setting depth mask");
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cState.depthMask = mState.depthMask;
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GLES30.glDepthMask(cState.depthMask==1);
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}
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320
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/////////////////////////////////////////////////////
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// 5. Enable Blending?
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if( mState.blend!=cState.blend )
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{
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cState.blend = mState.blend;
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if (cState.blend == 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( mState.blendSrc!=cState.blendSrc || mState.blendDst!=cState.blendDst )
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{
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//android.util.Log.d("State", "setting blend function");
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cState.blendSrc = mState.blendSrc;
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cState.blendDst = mState.blendDst;
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GLES30.glBlendFunc(cState.blendSrc,cState.blendDst);
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}
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348
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/////////////////////////////////////////////////////
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350
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// 7. Enable/Disable Stencil Test?
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351
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if( mState.stencilTest!=cState.stencilTest )
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352
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{
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353
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cState.stencilTest = mState.stencilTest;
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354
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355
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if (cState.stencilTest == 0)
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356
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{
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357
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//android.util.Log.d("State", "disabling stencil test");
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358
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GLES30.glDisable(GLES30.GL_STENCIL_TEST);
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359
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}
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360
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else
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361
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{
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362
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//android.util.Log.d("State", "enabling stencil test");
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363
|
GLES30.glEnable(GLES30.GL_STENCIL_TEST);
|
|
364
|
}
|
|
365
|
}
|
|
366
|
|
|
367
|
/////////////////////////////////////////////////////
|
|
368
|
// 8. Adjust Stencil function?
|
|
369
|
if( mState.stencilFuncFunc!=cState.stencilFuncFunc || mState.stencilFuncRef!=cState.stencilFuncRef || mState.stencilFuncMask!=cState.stencilFuncMask )
|
|
370
|
{
|
|
371
|
//android.util.Log.d("State", "setting stencil function");
|
|
372
|
cState.stencilFuncFunc = mState.stencilFuncFunc;
|
|
373
|
cState.stencilFuncRef = mState.stencilFuncRef ;
|
|
374
|
cState.stencilFuncMask = mState.stencilFuncMask;
|
|
375
|
GLES30.glStencilFunc(cState.stencilFuncFunc,cState.stencilFuncRef,cState.stencilFuncMask);
|
|
376
|
}
|
|
377
|
|
|
378
|
/////////////////////////////////////////////////////
|
|
379
|
// 9. Adjust Stencil operation?
|
|
380
|
if( mState.stencilOpSfail!=cState.stencilOpSfail || mState.stencilOpDpfail!=cState.stencilOpDpfail || mState.stencilOpDppass!=cState.stencilOpDppass )
|
|
381
|
{
|
|
382
|
//android.util.Log.d("State", "setting stencil op");
|
|
383
|
cState.stencilOpSfail = mState.stencilOpSfail;
|
|
384
|
cState.stencilOpDpfail= mState.stencilOpDpfail;
|
|
385
|
cState.stencilOpDppass= mState.stencilOpDppass;
|
|
386
|
GLES30.glStencilOp(cState.stencilOpSfail,cState.stencilOpDpfail,cState.stencilOpDppass);
|
|
387
|
}
|
|
388
|
|
|
389
|
/////////////////////////////////////////////////////
|
|
390
|
// 10. Write to Stencil buffer?
|
|
391
|
if( mState.stencilMask!=cState.stencilMask )
|
|
392
|
{
|
|
393
|
//android.util.Log.d("State", "setting stencil mask");
|
|
394
|
cState.stencilMask = mState.stencilMask;
|
|
395
|
GLES30.glStencilMask(cState.stencilMask);
|
|
396
|
}
|
|
397
|
|
|
398
|
/////////////////////////////////////////////////////
|
|
399
|
// 11. Clear buffers?
|
|
400
|
if( mClear!=0 )
|
|
401
|
{
|
|
402
|
//android.util.Log.d("State", "clearing buffer");
|
|
403
|
GLES30.glClear(mClear);
|
|
404
|
}
|
|
405
|
}
|
|
406
|
|
|
407
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
408
|
|
|
409
|
void glColorMask(boolean r, boolean g, boolean b, boolean a)
|
|
410
|
{
|
|
411
|
mState.colorMaskR = (r ? 1:0);
|
|
412
|
mState.colorMaskG = (g ? 1:0);
|
|
413
|
mState.colorMaskB = (b ? 1:0);
|
|
414
|
mState.colorMaskA = (a ? 1:0);
|
|
415
|
}
|
|
416
|
|
|
417
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
418
|
|
|
419
|
void glDepthMask(boolean mask)
|
|
420
|
{
|
|
421
|
mState.depthMask = (mask ? 1:0);
|
|
422
|
}
|
|
423
|
|
|
424
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
425
|
|
|
426
|
void glStencilMask(int mask)
|
|
427
|
{
|
|
428
|
mState.stencilMask = mask;
|
|
429
|
}
|
|
430
|
|
|
431
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
432
|
|
|
433
|
void glEnable(int test)
|
|
434
|
{
|
|
435
|
if( test==GLES30.GL_DEPTH_TEST ) mState.depthTest = 1;
|
|
436
|
else if( test==GLES30.GL_STENCIL_TEST ) mState.stencilTest = 1;
|
|
437
|
else if( test==GLES30.GL_BLEND ) mState.blend = 1;
|
|
438
|
}
|
|
439
|
|
|
440
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
441
|
|
|
442
|
void glDisable(int test)
|
|
443
|
{
|
|
444
|
if( test==GLES30.GL_DEPTH_TEST ) mState.depthTest = 0;
|
|
445
|
else if( test==GLES30.GL_STENCIL_TEST ) mState.stencilTest = 0;
|
|
446
|
else if( test==GLES30.GL_BLEND ) mState.blend = 0;
|
|
447
|
}
|
|
448
|
|
|
449
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
450
|
|
|
451
|
void glStencilFunc(int func, int ref, int mask)
|
|
452
|
{
|
|
453
|
mState.stencilFuncFunc = func;
|
|
454
|
mState.stencilFuncRef = ref;
|
|
455
|
mState.stencilFuncMask = mask;
|
|
456
|
}
|
|
457
|
|
|
458
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
459
|
|
|
460
|
void glStencilOp(int sfail, int dpfail, int dppass)
|
|
461
|
{
|
|
462
|
mState.stencilOpSfail = sfail;
|
|
463
|
mState.stencilOpDpfail= dpfail;
|
|
464
|
mState.stencilOpDppass= dppass;
|
|
465
|
}
|
|
466
|
|
|
467
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
468
|
|
|
469
|
void glDepthFunc(int func)
|
|
470
|
{
|
|
471
|
mState.depthFunc = func;
|
|
472
|
}
|
|
473
|
|
|
474
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
475
|
|
|
476
|
void glBlendFunc(int src, int dst)
|
|
477
|
{
|
|
478
|
mState.blendSrc = src;
|
|
479
|
mState.blendDst = dst;
|
|
480
|
}
|
|
481
|
|
|
482
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
483
|
|
|
484
|
void glClear(int mask)
|
|
485
|
{
|
|
486
|
mClear = mask;
|
|
487
|
}
|
|
488
|
}
|