author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 07:56:43 +0200 | |
changeset 0 | 15bf7259bb7c |
child 13 | 3a60ebea00d0 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "HuiFxVg10BlurFilter.h" |
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#include "HuiFxVg10RenderbufferBase.h" |
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#include "HuiFxConstants.h" |
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// identity mapping of colour components (i.e. 0->0, 1->1, ..., 255->255) |
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const VGubyte CHuiFxVg10BlurFilter::iColorLUT[256] = |
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{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, |
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, |
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, |
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, |
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0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, |
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, |
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, |
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, |
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, |
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, |
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0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, |
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0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, |
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0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, |
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0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, |
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, |
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0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF}; |
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CHuiFxVg10BlurFilter* CHuiFxVg10BlurFilter::NewL() |
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{ |
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CHuiFxVg10BlurFilter* self = new (ELeave) CHuiFxVg10BlurFilter(); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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CleanupStack::Pop( self ); |
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return self; |
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} |
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void CHuiFxVg10BlurFilter::ConstructL() |
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{ |
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CHuiFxFilter::ConstructL(); |
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iOldOpacity = -1.0f; // value out of range to force update of AlphaLUT |
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iBlurX = 0.0; |
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iBlurY = 0.0; |
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memset(iAlphaLUT, '\0', sizeof(iAlphaLUT)); |
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RegisterParameterL(KLitBlurX, &iBlurX); |
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RegisterParameterL(KLitBlurY, &iBlurY); |
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} |
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CHuiFxVg10BlurFilter *CHuiFxVg10BlurFilter::CloneL() const |
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{ |
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CHuiFxVg10BlurFilter *filter = new (ELeave) CHuiFxVg10BlurFilter; |
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filter->CHuiFxFilter::CopyFromL(this); |
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filter->iOldOpacity = iOldOpacity; |
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filter->iBlurX = iBlurX; |
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filter->iBlurY = iBlurY; |
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memcpy(filter->iAlphaLUT, iAlphaLUT, sizeof(iAlphaLUT)); |
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filter->CopyParameterL(KLitBlurX, &filter->iBlurX, this); |
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filter->CopyParameterL(KLitBlurY, &filter->iBlurY, this); |
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return filter; |
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} |
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void CHuiFxVg10BlurFilter::CalculateMargin(TMargins &aMargin) const |
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{ |
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aMargin.iLeft = iBlurX; |
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aMargin.iRight = iBlurX; |
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aMargin.iBottom = iBlurY; |
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aMargin.iTop = iBlurY; |
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} |
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TBool CHuiFxVg10BlurFilter::Draw(CHuiFxEngine& aEngine, CHuiGc& /* aGc */, CHuiFxRenderbuffer& aTarget, |
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CHuiFxRenderbuffer& aSource, const TRect& aTargetRect, const TRect& aSourceRect) |
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{ |
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aTarget.BindAsTexture(ERenderbufferUsageWriteOnly); |
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aSource.BindAsTexture(ERenderbufferUsageReadOnly); |
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VGImage srcImage = (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aSource))->AcquireSubImage(aSourceRect); |
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VGImage destImage = (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aTarget))->AcquireSubImage(aTargetRect); |
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93 |
|
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// take opacity into account |
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const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); |
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96 |
|
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if(opacity > EPSILON) |
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{ |
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DrawEffect(aEngine, destImage, srcImage, aSourceRect.Width(), aSourceRect.Height()); |
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} |
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else |
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102 |
{ |
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// VGint width = vgGetParameteri(srcImage, VG_IMAGE_WIDTH); |
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// VGint height = vgGetParameteri(srcImage, VG_IMAGE_HEIGHT); |
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VGint width = aSourceRect.Width(); |
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VGint height = aSourceRect.Height(); |
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vgClearImage(destImage, 0, 0, width, height); |
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} |
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109 |
|
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HUIFX_VG_INVARIANT(); |
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(reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aSource))->ReleaseSubImage(srcImage); |
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(reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aTarget))->ReleaseSubImage(destImage); |
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aTarget.UnbindAsTexture(); |
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aSource.UnbindAsTexture(); |
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115 |
|
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return wasEnoughMemory(); |
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} |
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118 |
|
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void CHuiFxVg10BlurFilter::DrawEffect(CHuiFxEngine& aEngine, VGImage aTargetImage, VGImage aSourceImage, TInt aWidth, TInt aHeight) |
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{ |
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const VGfloat blur_x = clamp(iBlurX, EPSILON, 128.0f); |
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const VGfloat blur_y = clamp(iBlurY, EPSILON, 128.0f); |
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const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); |
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|
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if(opacity < 1.0f - EPSILON) // slow path --- take opacity into account |
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{ |
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// const VGint width = vgGetParameteri(aSourceImage, VG_IMAGE_WIDTH); |
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// const VGint height = vgGetParameteri(aSourceImage, VG_IMAGE_HEIGHT); |
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const VGint width = aWidth; |
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const VGint height = aHeight; |
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|
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CHuiFxRenderbuffer* auxBuffer = aEngine.AcquireRenderbuffer(TSize(width, height)); |
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if (!auxBuffer) |
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{ |
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return; // not enough memory --- filter not completed successfully |
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} |
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auxBuffer->BindAsTexture(ERenderbufferUsageReadWrite); |
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138 |
|
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VGImage auxImage = reinterpret_cast<CHuiFxVg10RenderbufferBase*>(auxBuffer)->Image(); |
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140 |
|
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vgGaussianBlur(auxImage, aSourceImage, blur_x, blur_y, VG_TILE_PAD); |
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142 |
|
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if(OpacityChanged()) |
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{ |
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UpdateAlphaLUT(); |
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} |
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vgLookup(aTargetImage, auxImage, iColorLUT, iColorLUT, iColorLUT, iAlphaLUT, VG_TRUE, VG_FALSE); |
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auxBuffer->UnbindAsTexture(); |
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aEngine.ReleaseRenderbuffer(auxBuffer); |
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150 |
} |
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else // fast path --- the blur, just blur and nothing but the blur. |
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152 |
{ |
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vgGaussianBlur(aTargetImage, aSourceImage, blur_x, blur_y, VG_TILE_PAD); |
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154 |
} |
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155 |
} |
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|
156 |
|
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|
157 |
|
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158 |
TBool CHuiFxVg10BlurFilter::OpacityChanged() |
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159 |
{ |
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if(iOpacity != iOldOpacity) |
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161 |
{ |
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iOldOpacity = iOpacity; |
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return ETrue; |
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} |
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165 |
else |
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166 |
{ |
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return EFalse; |
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168 |
} |
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169 |
} |
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170 |
|
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|
171 |
|
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void CHuiFxVg10BlurFilter::UpdateAlphaLUT() |
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173 |
{ |
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VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f); |
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|
175 |
|
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// generate ramp for alpha channel. the bigger the steepness the more solid the outline. |
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for(int i = 0; i < 256; i++) |
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178 |
{ |
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iAlphaLUT[i] = (VGubyte)((VGfloat)i * opacity); |
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} |
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181 |
} |