ganeswidgets/src/hgvgquadrenderer.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 18 Aug 2010 10:52:49 +0300
changeset 13 8bf920201dea
parent 9 dde80bf4a8c7
permissions -rw-r--r--
Revision: 201031 Kit: 201033
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/*
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* Copyright (c) 2009 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 "hgvgquadrenderer.h"
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#include "hgtransformedquad.h"
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#include "hgquad.h"
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#include "hgvgimage.h"
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#include "trace.h"
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#include "hgimagefader.h"
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#include <VG/openvg.h>
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#include <VG/vgu.h>
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#include <QVector2D>
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#include <QPolygon>
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#include <QMatrix4x4>
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#include <QPainter>
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static void matrixFromTransform(VGfloat* matrix, const QTransform& tm)
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{
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    matrix[0] = tm.m11();
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    matrix[1] = tm.m12();
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    matrix[2] = tm.m13();
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    matrix[3] = tm.m21();
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    matrix[4] = tm.m22();
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    matrix[5] = tm.m23();
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    matrix[6] = tm.m31();
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    matrix[7] = tm.m32();
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    matrix[8] = tm.m33();
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}
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class HgVgQuad : public HgTransformedQuad
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{
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public:
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    HgVgQuad(HgVgQuadRenderer* renderer) : HgTransformedQuad(-1), mRenderer(renderer)
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    {
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    }
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    ~HgVgQuad()
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    {
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    }
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    void draw(QPainter* painter, const QRectF& rect)    
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    {
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        Q_UNUSED(painter)
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        Q_UNUSED(rect)
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        if (!mQuad->visible())
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            return;
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        HgVgImage* image = (HgVgImage*)mQuad->image();
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        if (image == NULL  || image->alpha() == 0)
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        {
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            if (mRenderer->defaultImage()) {
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                drawImage(mRenderer->defaultImage(), 1.0f);
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            }
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        }
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        else
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        {
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            image->upload(mQuad->mirrorImageEnabled());
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            if (image->image() == VG_INVALID_HANDLE)
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            {
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                if (mRenderer->defaultImage()) {
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                    drawImage(mRenderer->defaultImage(), 1.0f);
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                }
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            }
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            else
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            {
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                if ( mQuad->alpha() < 1.0f )
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                {
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                    if (mRenderer->defaultImage()) {
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                        drawImage(mRenderer->defaultImage(), 1.0f - mQuad->alpha());            
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                    }
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                }
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                drawImage(image, mQuad->alpha());
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            }
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        }
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    }
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    void drawImage(HgVgImage* image, qreal alpha)
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    {
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        Q_UNUSED(alpha)
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        VGImage vgImage = image->image();
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        vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
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        VGfloat m[9];
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        vgGetMatrix(m);
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        computeWarpMatrix(mMatrix, image->width(), image->height(), mTransformedPoints, QVector2D());
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   116
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        vgMultMatrix(mMatrix);
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        vgDrawImage(vgImage);    
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        vgLoadMatrix(m);
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   121
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        if (mQuad->mirrorImageEnabled())
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        {
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            VGImage mirrorImage = image->mirrorImage();
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            if (mirrorImage == VG_INVALID_HANDLE)
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                return;
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            computeWarpMatrix(mMirrorMatrix, image->mirrorImageWidth(), image->mirrorImageHeight(), mMirroredPoints, QVector2D());
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            vgMultMatrix(mMirrorMatrix);
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            vgDrawImage(mirrorImage);    
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            vgLoadMatrix(m);    
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        }
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    }
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private:
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    void computeWarpMatrix(VGfloat* matrix, int pxWidth, int pxHeight, const QVector2D* points, 
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        const QVector2D& translate)
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    {        
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        Q_UNUSED(translate)
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        vguComputeWarpQuadToQuad(
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            points[0].x(), points[0].y(), 
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            points[1].x(), points[1].y(),
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            points[2].x(), points[2].y(),
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            points[3].x(), points[3].y(),
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            0, pxHeight,
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            pxWidth, pxHeight,
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            pxWidth, 0,
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            0, 0,
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            matrix);
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    }
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    HgVgQuadRenderer* mRenderer;
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    VGfloat mMatrix[9];
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    VGfloat mMirrorMatrix[9];
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};
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HgVgQuadRenderer::HgVgQuadRenderer(int maxQuads) : 
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    HgTransformedQuadRenderer(maxQuads),
0
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    mDefaultVgImage(NULL)
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{
2
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    init(maxQuads);
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}
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HgVgQuadRenderer::~HgVgQuadRenderer()
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{
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    delete mDefaultVgImage;
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}
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void HgVgQuadRenderer::drawQuads(QPainter* painter, const QRectF& rect, 
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    const QMatrix4x4& viewMatrix, const QMatrix4x4& projectionMatrix,
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    Qt::Orientation orientation, 
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    const QTransform& sceneTransform)
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{
2
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    // start direct vg
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    painter->beginNativePainting();
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    // setup default vg states
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    vgSeti(VG_COLOR_TRANSFORM, VG_FALSE);
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    vgSeti(VG_BLEND_MODE, VG_BLEND_SRC_OVER);
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    vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_NORMAL);
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    // setup root transform
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    vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
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    VGfloat toVgMatrix[9];
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    matrixFromTransform(toVgMatrix, qtToVgTransform(painter, sceneTransform, rect, orientation));
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    vgLoadMatrix(toVgMatrix);   
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    // transform quads to screen
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    transformQuads(viewMatrix, projectionMatrix, QPointF(rect.width()/2, rect.height()/2), 
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        QSizeF(rect.width(), rect.height()));
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    drawTransformedQuads(painter, rect);
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    // end directt vg
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    painter->endNativePainting();
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}
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HgImage* HgVgQuadRenderer::createNativeImage()
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{    
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    return new HgVgImage(this);   
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}
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HgTransformedQuad* HgVgQuadRenderer::createNativeQuad()
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{
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    return new HgVgQuad(this);
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}
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HgVgImage* HgVgQuadRenderer::defaultImage()
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{
1
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    if (mDefaultVgImage && mDefaultVgImage->image() == VG_INVALID_HANDLE) {
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        mDefaultVgImage->upload(true);
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    }
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    return mDefaultVgImage;
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}
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1
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void HgVgQuadRenderer::setDefaultImage(QImage defaultImage)
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{
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    HgQuadRenderer::setDefaultImage(defaultImage);
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    delete mDefaultVgImage;
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    mDefaultVgImage = 0;
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    mDefaultVgImage = static_cast<HgVgImage*>(createNativeImage());
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    mDefaultVgImage->setImage(mDefaultImage);
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    mDefaultVgImage->upload(true);    
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}
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2
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QTransform HgVgQuadRenderer::qtToVgTransform(QPainter* painter, const QTransform& sceneTransform, 
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    const QRectF& rect, Qt::Orientation orientation) const
0
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{
2
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    QTransform t;
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    if (orientation == Qt::Vertical)
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    {
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        t.translate(sceneTransform.dx(), painter->viewport().height() - sceneTransform.dy());
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        t.scale(1, -1);    
0
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    }
2
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    else
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    {
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        // TODO: this will need reviewing later :)
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        t.translate(rect.bottom(), 0);
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        t.scale(-1, 1);
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        t.translate(0, rect.right());
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        t.rotate(-90, Qt::ZAxis);        
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    }
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    return t;
0
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}