diff -r 000000000000 -r 15bf7259bb7c uiacceltk/hitchcock/coretoolkit/rendervg10/src/HuiFxVg10BlurFilter.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/uiacceltk/hitchcock/coretoolkit/rendervg10/src/HuiFxVg10BlurFilter.cpp Tue Feb 02 07:56:43 2010 +0200 @@ -0,0 +1,181 @@ +/* +* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). +* All rights reserved. +* This component and the accompanying materials are made available +* under the terms of "Eclipse Public License v1.0" +* which accompanies this distribution, and is available +* at the URL "http://www.eclipse.org/legal/epl-v10.html". +* +* Initial Contributors: +* Nokia Corporation - initial contribution. +* +* Contributors: +* +* Description: +* +*/ + + + +#include "HuiFxVg10BlurFilter.h" +#include "HuiFxVg10RenderbufferBase.h" +#include "HuiFxConstants.h" + +// identity mapping of colour components (i.e. 0->0, 1->1, ..., 255->255) +const VGubyte CHuiFxVg10BlurFilter::iColorLUT[256] = + {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, + 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, + 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, + 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, + 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, + 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, + 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, + 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, + 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, + 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, + 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, + 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF}; + +CHuiFxVg10BlurFilter* CHuiFxVg10BlurFilter::NewL() + { + CHuiFxVg10BlurFilter* self = new (ELeave) CHuiFxVg10BlurFilter(); + CleanupStack::PushL( self ); + self->ConstructL(); + CleanupStack::Pop( self ); + return self; + } + +void CHuiFxVg10BlurFilter::ConstructL() + { + CHuiFxFilter::ConstructL(); + iOldOpacity = -1.0f; // value out of range to force update of AlphaLUT + iBlurX = 0.0; + iBlurY = 0.0; + + memset(iAlphaLUT, '\0', sizeof(iAlphaLUT)); + + RegisterParameterL(KLitBlurX, &iBlurX); + RegisterParameterL(KLitBlurY, &iBlurY); + } +CHuiFxVg10BlurFilter *CHuiFxVg10BlurFilter::CloneL() const + { + CHuiFxVg10BlurFilter *filter = new (ELeave) CHuiFxVg10BlurFilter; + filter->CHuiFxFilter::CopyFromL(this); + filter->iOldOpacity = iOldOpacity; + filter->iBlurX = iBlurX; + filter->iBlurY = iBlurY; + memcpy(filter->iAlphaLUT, iAlphaLUT, sizeof(iAlphaLUT)); + filter->CopyParameterL(KLitBlurX, &filter->iBlurX, this); + filter->CopyParameterL(KLitBlurY, &filter->iBlurY, this); + return filter; + } + + +void CHuiFxVg10BlurFilter::CalculateMargin(TMargins &aMargin) const +{ + aMargin.iLeft = iBlurX; + aMargin.iRight = iBlurX; + aMargin.iBottom = iBlurY; + aMargin.iTop = iBlurY; +} + +TBool CHuiFxVg10BlurFilter::Draw(CHuiFxEngine& aEngine, CHuiGc& /* aGc */, CHuiFxRenderbuffer& aTarget, + CHuiFxRenderbuffer& aSource, const TRect& aTargetRect, const TRect& aSourceRect) + { + aTarget.BindAsTexture(ERenderbufferUsageWriteOnly); + aSource.BindAsTexture(ERenderbufferUsageReadOnly); + VGImage srcImage = (reinterpret_cast(&aSource))->AcquireSubImage(aSourceRect); + VGImage destImage = (reinterpret_cast(&aTarget))->AcquireSubImage(aTargetRect); + + // take opacity into account + const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); + + if(opacity > EPSILON) + { + DrawEffect(aEngine, destImage, srcImage, aSourceRect.Width(), aSourceRect.Height()); + } + else + { +// VGint width = vgGetParameteri(srcImage, VG_IMAGE_WIDTH); +// VGint height = vgGetParameteri(srcImage, VG_IMAGE_HEIGHT); + VGint width = aSourceRect.Width(); + VGint height = aSourceRect.Height(); + vgClearImage(destImage, 0, 0, width, height); + } + + HUIFX_VG_INVARIANT(); + (reinterpret_cast(&aSource))->ReleaseSubImage(srcImage); + (reinterpret_cast(&aTarget))->ReleaseSubImage(destImage); + aTarget.UnbindAsTexture(); + aSource.UnbindAsTexture(); + + return wasEnoughMemory(); + } + +void CHuiFxVg10BlurFilter::DrawEffect(CHuiFxEngine& aEngine, VGImage aTargetImage, VGImage aSourceImage, TInt aWidth, TInt aHeight) + { + const VGfloat blur_x = clamp(iBlurX, EPSILON, 128.0f); + const VGfloat blur_y = clamp(iBlurY, EPSILON, 128.0f); + const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); + + if(opacity < 1.0f - EPSILON) // slow path --- take opacity into account + { +// const VGint width = vgGetParameteri(aSourceImage, VG_IMAGE_WIDTH); +// const VGint height = vgGetParameteri(aSourceImage, VG_IMAGE_HEIGHT); + const VGint width = aWidth; + const VGint height = aHeight; + + CHuiFxRenderbuffer* auxBuffer = aEngine.AcquireRenderbuffer(TSize(width, height)); + if (!auxBuffer) + { + return; // not enough memory --- filter not completed successfully + } + auxBuffer->BindAsTexture(ERenderbufferUsageReadWrite); + + VGImage auxImage = reinterpret_cast(auxBuffer)->Image(); + + vgGaussianBlur(auxImage, aSourceImage, blur_x, blur_y, VG_TILE_PAD); + + if(OpacityChanged()) + { + UpdateAlphaLUT(); + } + vgLookup(aTargetImage, auxImage, iColorLUT, iColorLUT, iColorLUT, iAlphaLUT, VG_TRUE, VG_FALSE); + auxBuffer->UnbindAsTexture(); + aEngine.ReleaseRenderbuffer(auxBuffer); + } + else // fast path --- the blur, just blur and nothing but the blur. + { + vgGaussianBlur(aTargetImage, aSourceImage, blur_x, blur_y, VG_TILE_PAD); + } + } + + +TBool CHuiFxVg10BlurFilter::OpacityChanged() + { + if(iOpacity != iOldOpacity) + { + iOldOpacity = iOpacity; + return ETrue; + } + else + { + return EFalse; + } + } + + +void CHuiFxVg10BlurFilter::UpdateAlphaLUT() + { + VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); + + // generate ramp for alpha channel. the bigger the steepness the more solid the outline. + for(int i = 0; i < 256; i++) + { + iAlphaLUT[i] = (VGubyte)((VGfloat)i * opacity); + } + }