128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "std3d.h"
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#include "nel/misc/common.h"
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#include "nel/3d/motion_blur.h"
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#include "nel/3d/driver.h"
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#include "nel/3d/texture.h"
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#include "nel/3d/texture_blank.h"
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#include "nel/3d/material.h"
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namespace NL3D {
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CMotionBlur::CMotionBlur() : _Tex(NULL), _X(0), _Y(0), _W(0), _H(0)
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{
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}
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void CMotionBlur::startMotionBlur(uint x, uint y, uint width, uint height)
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{
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nlassert(width > 0 && height > 0) ;
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_X = x ;
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_Y = y ;
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_W = width ;
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_H = height ;
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_Tex = new CTextureBlank ;
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_Tex->resize(NLMISC::raiseToNextPowerOf2(width), NLMISC::raiseToNextPowerOf2(height)) ;
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}
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void CMotionBlur::releaseMotionBlur()
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{
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_Tex = NULL ;
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_X = _Y = _W = _H = 0 ;
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}
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void CMotionBlur::performMotionBlur(IDriver *driver, float motionBlurAmount)
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{
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nlassert(_Tex) ; //start motion blur has not been called !!
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nlassert(driver) ;
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nlassert(motionBlurAmount >= 0.f && motionBlurAmount <= 1.f) ;
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static CVertexBuffer vb ;
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vb.setVertexFormat(CVertexBuffer::PositionFlag | CVertexBuffer::TexCoord0Flag ) ;
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vb.setNumVertices(4) ;
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uint32 width, height ;
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driver->getWindowSize(width, height) ;
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float widthRatio = _W / (float) NLMISC::raiseToNextPowerOf2 (_W) ;
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float heightRatio = _H / (float) NLMISC::raiseToNextPowerOf2 (_H) ;
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driver->setFrustum(0, (float) width, 0, (float) height, -1, 1, false) ;
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static CMaterial mbMat ;
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{
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CVertexBufferReadWrite vba;
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vb.lock (vba);
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for (uint sn = 0 ; sn < 2 ; ++sn)
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{
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vba.setTexCoord(0, sn, CUV(0, 0)) ;
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vba.setTexCoord(1, sn, CUV(widthRatio, 0)) ;
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vba.setTexCoord(2, sn, CUV(widthRatio, heightRatio)) ;
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vba.setTexCoord(3, sn, CUV(0, heightRatio)) ;
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}
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static bool matSetup = false ; // set to true when mbMat has Been setup
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if (!matSetup)
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{
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mbMat.setBlend(true) ;
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mbMat.setBlendFunc(CMaterial::srcalpha, CMaterial::invsrcalpha) ;
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mbMat.setZWrite(false) ;
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mbMat.setZFunc(CMaterial::always) ;
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// stage 0
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mbMat.setTexture(0, _Tex) ;
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mbMat.texEnvOpRGB(0, CMaterial::Replace );
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mbMat.texEnvArg0Alpha(0, CMaterial::Diffuse, CMaterial::SrcAlpha);
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mbMat.texEnvOpAlpha(0, CMaterial::Replace);
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mbMat.setDoubleSided(true) ;
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matSetup = true ;
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}
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mbMat.setColor(CRGBA(255, 255, 255, (uint8) (255.f * motionBlurAmount) ) ) ;
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vba.setVertexCoord(0, CVector((float) _X, 0, 0) ) ;
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vba.setVertexCoord(1, CVector((float) (_X + _W), 0 ,0) ) ;
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vba.setVertexCoord(2, CVector((float) (_X + _W), 0, (float) (_Y + _H) ) );
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vba.setVertexCoord(3, CVector(0 , 0, (float) (_Y + _H) ) ) ;
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}
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driver->setupViewMatrix(CMatrix::Identity) ;
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driver->setupModelMatrix(CMatrix::Identity) ;
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driver->activeVertexBuffer(vb) ;
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driver->renderRawQuads(mbMat, 0, 1) ;
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// blit back frame buffer to save this frame
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// todo hulud : use the new render to texture interface
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// driver->copyFrameBufferToTexture(_Tex, 0, 0, 0, _X, _Y, _W, _H) ;
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}
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} // NL3D
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