Reduce innecesary changes on Render Target textures.

Engine/source/lighting/shadowMap/dualParaboloidLightShadowMap.cpp

@@ -59,6 +59,7 @@ void DualParaboloidLightShadowMap::_render(  RenderPassManager* renderPass,
       mShadowMapTex.set(   mTexSize * 2, mTexSize, 
                            ShadowMapFormat, &ShadowMapProfile, 
                            "DualParaboloidLightShadowMap" );
+      mShadowMapDepth = _getDepthTarget( mShadowMapTex->getWidth(), mShadowMapTex->getHeight() );
    }
 
    GFXFrustumSaver frustSaver;
@@ -68,8 +69,7 @@ void DualParaboloidLightShadowMap::_render(  RenderPassManager* renderPass,
    GFX->pushActiveRenderTarget();
 
    mTarget->attachTexture(GFXTextureTarget::Color0, mShadowMapTex);
-   mTarget->attachTexture( GFXTextureTarget::DepthStencil, 
-      _getDepthTarget( mShadowMapTex->getWidth(), mShadowMapTex->getHeight() ) );
+   mTarget->attachTexture( GFXTextureTarget::DepthStencil, mShadowMapDepth );
    GFX->setActiveRenderTarget(mTarget);
    GFX->clear(GFXClearTarget | GFXClearStencil | GFXClearZBuffer, ColorI::WHITE, 1.0f, 0);
 

Engine/source/lighting/shadowMap/lightShadowMap.h

@@ -259,6 +259,7 @@ protected:
    GFXTextureTargetRef mTarget;
    U32 mTexSize;
    GFXTexHandle mShadowMapTex;
+   GFXTexHandle mShadowMapDepth;
 
    // The light we are rendering.
    LightInfo *mLight;   

Engine/source/lighting/shadowMap/pssmLightShadowMap.cpp

@@ -204,7 +204,10 @@ void PSSMLightShadowMap::_render(   RenderPassManager* renderPass,
    if (  mShadowMapTex.isNull() || 
          mNumSplits != params->numSplits || 
          mTexSize != texSize )
+   {
       _setNumSplits( params->numSplits, texSize );
+      mShadowMapDepth = _getDepthTarget( mShadowMapTex->getWidth(), mShadowMapTex->getHeight() );   
+   }
    mLogWeight = params->logWeight;
 
    Frustum fullFrustum( diffuseState->getCameraFrustum() );
@@ -216,8 +219,7 @@ void PSSMLightShadowMap::_render(   RenderPassManager* renderPass,
    // Set our render target
    GFX->pushActiveRenderTarget();
    mTarget->attachTexture( GFXTextureTarget::Color0, mShadowMapTex );
-   mTarget->attachTexture( GFXTextureTarget::DepthStencil, 
-      _getDepthTarget( mShadowMapTex->getWidth(), mShadowMapTex->getHeight() ) );
+   mTarget->attachTexture( GFXTextureTarget::DepthStencil, mShadowMapDepth );
    GFX->setActiveRenderTarget( mTarget );
    GFX->clear( GFXClearStencil | GFXClearZBuffer | GFXClearTarget, ColorI(255,255,255), 1.0f, 0 );
 

Engine/source/renderInstance/renderFormatChanger.cpp

@@ -218,24 +218,35 @@ void RenderFormatToken::_updateTargets()
       // Update color target
       if(mColorFormat != GFXFormat_COUNT)
       {
+         // try reuse of old color texture
+         if( !mTargetColorTexture[i] || mTargetColorTexture[i].getFormat() != mColorFormat 
+            || mTargetColorTexture[i].getWidthHeight() != rtSize)
+         {
          mTargetColorTexture[i].set( rtSize.x, rtSize.y, mColorFormat, 
             &GFXDefaultRenderTargetProfile, avar( "%s() - (line %d)", __FUNCTION__, __LINE__ ),
             1, mTargetAALevel );
          mTargetChain[i]->attachTexture( GFXTextureTarget::Color0, mTargetColorTexture[i] );
       }
+      }
+
 
-      mTargetChain[i]->attachTexture( GFXTextureTarget::Color0, mTargetColorTexture[i] );
       
 
       // Update depth target
       if(mDepthFormat != GFXFormat_COUNT)
       {
+         // try reuse of old depth texture
+         if( !mTargetDepthStencilTexture[i] || mTargetDepthStencilTexture[i].getFormat() != mColorFormat 
+            || mTargetDepthStencilTexture[i].getWidthHeight() != rtSize)
+         {
          mTargetDepthStencilTexture[i].set( rtSize.x, rtSize.y, mDepthFormat, 
             &GFXDefaultZTargetProfile, avar( "%s() - (line %d)", __FUNCTION__, __LINE__ ),
             1, mTargetAALevel );
+            mTargetChain[i]->attachTexture( GFXTextureTarget::DepthStencil, mTargetDepthStencilTexture[i] );
+         }
       }
 
-      mTargetChain[i]->attachTexture( GFXTextureTarget::DepthStencil, mTargetDepthStencilTexture[i] );
+     
    }
 }
 

Engine/source/renderInstance/renderTexTargetBinManager.cpp

@@ -166,11 +166,16 @@ bool RenderTexTargetBinManager::_updateTargets()
 
       for( U32 j = 0; j < mNumRenderTargets; j++ )
       {
+         // try reuse of old color texture
+         if( mTargetChainTextures[i][j].getWidthHeight() != mTargetSize 
+            || mTargetChainTextures[i][j].getFormat() != mTargetFormat)
+         {
          ret &= mTargetChainTextures[i][j].set( mTargetSize.x, mTargetSize.y, mTargetFormat,
             &GFXDefaultRenderTargetProfile, avar( "%s() - (line %d)", __FUNCTION__, __LINE__ ),
             1, GFXTextureManager::AA_MATCH_BACKBUFFER );
 
          mTargetChain[i]->attachTexture( GFXTextureTarget::RenderSlot(GFXTextureTarget::Color0 + j), mTargetChainTextures[i][j] );
+         }
       }
    }
 

Engine/source/scene/reflector.cpp

@@ -539,9 +539,10 @@ void PlaneReflector::updateReflection( const ReflectParams &params )
    if (  texResize || 
          reflectTex.isNull() ||
          reflectTex->getFormat() != REFLECTMGR->getReflectFormat() )
+   {
       reflectTex = REFLECTMGR->allocRenderTarget( texSize );
-
-   GFXTexHandle depthBuff = LightShadowMap::_getDepthTarget( texSize.x, texSize.y );
+      depthBuff = LightShadowMap::_getDepthTarget( texSize.x, texSize.y );
+   }
 
    // store current matrices
    GFXTransformSaver saver;

Engine/source/scene/reflector.h

@@ -224,7 +224,7 @@ protected:
 public:
 
    GFXTextureTargetRef reflectTarget;
-   GFXTexHandle reflectTex;   
+   GFXTexHandle reflectTex, depthBuff;;   
    PlaneF refplane;
    bool objectSpace;
 };