C++ QPixmap::pixmapData方法代码示例

void QVGPixmapDropShadowFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
{
    if (src.isNull())
        return;

    if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
        // The pixmap data is not an instance of QVGPixmapData, so fall
        // back to the default drop shadow filter implementation.
        QPixmapDropShadowFilter::draw(painter, dest, src, srcRect);
        return;
    }

    QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());

    VGImage srcImage = pd->toVGImage();
    if (srcImage == VG_INVALID_HANDLE)
        return;

    QSize size = pd->size();
    VGImage dstImage = QVGImagePool::instance()->createTemporaryImage
        (VG_A_8, size.width(), size.height(),
         VG_IMAGE_QUALITY_FASTER, pd);
    if (dstImage == VG_INVALID_HANDLE)
        return;

    // Clamp the radius range.  We divide by 2 because the OpenVG blur
    // is "too blurry" compared to the default raster implementation.
    VGfloat maxRadius = VGfloat(vgGeti(VG_MAX_GAUSSIAN_STD_DEVIATION));
    VGfloat radiusF = VGfloat(blurRadius()) / 2.0f;
    if (radiusF < 0.001f)
        radiusF = 0.001f;
    else if (radiusF > maxRadius)
        radiusF = maxRadius;

    // Blur the blackened source image.
    vgGaussianBlur(dstImage, srcImage, radiusF, radiusF, VG_TILE_PAD);

    VGImage child = VG_INVALID_HANDLE;

    QRect srect;
    if (srcRect.isNull() ||
        (srcRect.topLeft().isNull() && srcRect.size() == size)) {
        child = dstImage;
        srect = QRect(0, 0, size.width(), size.height());
    } else {
        srect = srcRect.toRect();
        child = vgChildImage(dstImage, srect.x(), srect.y(), srect.width(), srect.height());
    }

    qt_vg_drawVGImageStencil(painter, dest + offset(), child, color());

    if(child != dstImage)
        vgDestroyImage(child);
    QVGImagePool::instance()->releaseImage(0, dstImage);

    // Now draw the actual pixmap over the top.
    painter->drawPixmap(dest, src, srect);
}

void QS60PaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
    if (pm.pixmapData()->classId() == QPixmapData::RasterClass) {
        QS60PixmapData *srcData = static_cast<QS60PixmapData *>(pm.pixmapData());
        srcData->beginDataAccess();
        QRasterPaintEngine::drawPixmap(r, pm, sr);
        srcData->endDataAccess();
    } else {
        QRasterPaintEngine::drawPixmap(r, pm, sr);
    }
}

void QS60PaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &sr)
{
    QS60PixmapData *srcData = static_cast<QS60PixmapData *>(pm.pixmapData());
    srcData->beginDataAccess();
    QRasterPaintEngine::drawTiledPixmap(r, pm, sr);
    srcData->endDataAccess();
}

    bool canBlitterDrawPixmapOpacity(const QPixmap &pm) const
    {
        if (pm.pixmapData()->classId() != QPixmapData::BlitterClass)
            return false;

        return checkStateAgainstMask(capabillitiesState, opacityPixmapMask);
    }

void QDirectFbBlitter::drawPixmap(const QRectF &rect, const QPixmap &pixmap, const QRectF &srcRect)
{
    QPixmapData *data = pixmap.pixmapData();
    Q_ASSERT(data->width() && data->height());
    Q_ASSERT(data->classId() == QPixmapData::BlitterClass);
    QBlittablePixmapData *blitPm = static_cast<QBlittablePixmapData*>(data);
    QDirectFbBlitter *dfbBlitter = static_cast<QDirectFbBlitter *>(blitPm->blittable());
    dfbBlitter->unlock();

    IDirectFBSurface *s = dfbBlitter->m_surface.data();

    DFBSurfaceBlittingFlags blittingFlags = DSBLIT_NOFX;
    DFBSurfacePorterDuffRule porterDuff = DSPD_SRC;
    if (pixmap.hasAlpha()) {
        blittingFlags = DSBLIT_BLEND_ALPHACHANNEL;
        porterDuff = DSPD_SRC_OVER;
    }

    m_surface->SetBlittingFlags(m_surface.data(), DFBSurfaceBlittingFlags(blittingFlags));
    m_surface->SetPorterDuff(m_surface.data(), porterDuff);
    m_surface->SetDstBlendFunction(m_surface.data(), DSBF_INVSRCALPHA);

    const DFBRectangle sRect = { srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height() };

    DFBResult result;
    if (rect.width() == srcRect.width() && rect.height() == srcRect.height())
        result = m_surface->Blit(m_surface.data(), s, &sRect, rect.x(), rect.y());
    else {
        const DFBRectangle dRect = { rect.x(), rect.y(), rect.width(), rect.height() };
        result = m_surface->StretchBlit(m_surface.data(), s, &sRect, &dRect);
    }
    if (result != DFB_OK)
        DirectFBError("QDirectFBBlitter::drawPixmap()", result);
}

void QDirectFBCursor::changeCursor(QCursor *cursor, QWidget *)
{
    int xSpot;
    int ySpot;
    QPixmap map;

    if (cursor->shape() != Qt::BitmapCursor) {
        m_image->set(cursor->shape());
        xSpot = m_image->hotspot().x();
        ySpot = m_image->hotspot().y();
        QImage *i = m_image->image();
        map = QPixmap::fromImage(*i);
    } else {
        QPoint point = cursor->hotSpot();
        xSpot = point.x();
        ySpot = point.y();
        map = cursor->pixmap();
    }

    DFBResult res;
    IDirectFBDisplayLayer *layer = toDfbLayer(screen);
    IDirectFBSurface* surface(QDirectFbConvenience::dfbSurfaceForPlatformPixmap(map.pixmapData()));

    res = layer->SetCooperativeLevel(layer, DLSCL_ADMINISTRATIVE);
    if (res != DFB_OK) {
        DirectFBError("Failed to set DLSCL_ADMINISTRATIVE", res);
        return;
    }

    layer->SetCursorShape(layer, surface, xSpot, ySpot);
    layer->SetCooperativeLevel(layer, DLSCL_SHARED);
}

void tst_NativeImageHandleProvider::hibernate()
{
#if defined(Q_OS_SYMBIAN) && !defined(QT_NO_OPENVG)
    QPixmap tmp(10, 20);
    if (tmp.pixmapData()->classId() == QPixmapData::OpenVGClass) {
        BitmapProvider prov;
        prov.bmp = new CFbsBitmap;
        QCOMPARE(prov.bmp->Create(TSize(prov.w, prov.h), EColor16MAP), KErrNone);

        QPixmap pm = pixmapFromNativeImageHandleProvider(&prov);
        QCOMPARE(prov.refCount, 1);

        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pm.pixmapData());
        vgpd->hibernate();
        QCOMPARE(prov.refCount, 0);

        // Calling toVGImage() may cause some warnings as we don't have a gui initialized,
        // but the only thing we care about here is get() being called.
        vgpd->toVGImage();
        QCOMPARE(prov.refCount, 1);

        pm = QPixmap();
        QCOMPARE(prov.refCount, 0);
        delete prov.bmp;
    } else {
         QSKIP("Not openvg", SkipSingle);
    }
#else
    QSKIP("Not applicable", SkipSingle);
#endif
}

/*
    \internal

    Returns the VGImage that is storing the contents of \a pixmap.
    Returns VG_INVALID_HANDLE if \a pixmap is not owned by the OpenVG
    graphics system or \a pixmap is invalid.

    This function is typically used to access the backing store
    for a pixmap when executing raw OpenVG calls.  It must only
    be used when a QPainter is active and the OpenVG paint engine
    is in use by the QPainter.

    \sa {QtOpenVG Module}
*/
Q_OPENVG_EXPORT VGImage qPixmapToVGImage(const QPixmap& pixmap)
{
    QPixmapData *pd = pixmap.pixmapData();
    if (!pd)
        return VG_INVALID_HANDLE; // null QPixmap
    if (pd->classId() == QPixmapData::OpenVGClass) {
        QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
        if (vgpd->isValid())
            return vgpd->toVGImage();
    }
    return VG_INVALID_HANDLE;
}

void FusionForeverWidget::DrawSection(Section_ptr section, std::string name, std::vector<std::pair<std::string, QPixmap*> >& icons)
{
	if(section)
	{
		float radius = section->GetRadius();
		
		Camera::Instance().SetSmallestDimension(40);

		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		Camera::Instance().SetupCamera();
		glMatrixMode(GL_MODELVIEW);
		glLoadIdentity();

		//Draw Section
		section->DeathTick();
		section->SetOutlineColor(GLColor(0,0,0));
		section->DrawSelf();
		
		glFlush();


		QImage icon = grabFrameBuffer();
		if(height() > width())
		{
			int top = (height() - width()) / 2;
			QImage icon2 = icon.copy(0, top, width(), width());
			QPixmap pm = QPixmap::fromImage(icon2);
			icons.push_back(std::pair<std::string, QPixmap*>(name, new QPixmap(pm.pixmapData())));
		} else
		{
			int left = (width() - height()) / 2;
			QImage icon2 = icon.copy(left, 0, height(), height());
			QPixmap pm = QPixmap::fromImage(icon2);
			icons.push_back(std::pair<std::string, QPixmap*>(name, new QPixmap(pm.pixmapData())));
		}

		delete section;
	}
}

void QVolatileImagePaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
#ifdef Q_OS_SYMBIAN
    QVolatileImage img = pm.pixmapData()->toVolatileImage();
    if (!img.isNull()) {
        img.beginDataAccess();
        QRasterPaintEngine::drawImage(r, img.constImageRef(), sr);
        img.endDataAccess(true);
    } else {
        QRasterPaintEngine::drawPixmap(r, pm, sr);
    }
#else
    QRasterPaintEngine::drawPixmap(r, pm, sr);
#endif
}

 bool canBlitterDrawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr) const
 {
     if (pm.pixmapData()->classId() != QPixmapData::BlitterClass)
         return false;
     if (checkStateAgainstMask(capabillitiesState, drawPixmapMask)) {
         if (m_capabilities & (QBlittable::SourceOverPixmapCapability
                               | QBlittable::SourceOverScaledPixmapCapability)) {
             if (r.size() != sr.size())
                 return m_capabilities & QBlittable::SourceOverScaledPixmapCapability;
             else
                 return m_capabilities & QBlittable::SourceOverPixmapCapability;
         }
         if ((m_capabilities & QBlittable::SourcePixmapCapability) && r.size() == sr.size() && !pm.hasAlphaChannel())
             return m_capabilities & QBlittable::SourcePixmapCapability;
     }
     return false;
 }

void QDirectFbBlitter::drawPixmapOpacity(const QRectF &rect, const QPixmap &pixmap, const QRectF &subrect, QPainter::CompositionMode cmode, qreal opacity)
{
    QRect sQRect = subrect.toRect();
    QRect dQRect = rect.toRect();
    DFBRectangle sRect = { sQRect.x(), sQRect.y(), sQRect.width(), sQRect.height() };
    DFBRectangle dRect = { dQRect.x(), dQRect.y(), dQRect.width(), dQRect.height() };
    DFBResult result;

    // skip if dst too small
    if ((dRect.w <= 0) || (dRect.h <= 0)) return;

    // correct roundings if needed
    if (sRect.w <= 0) sRect.w = 1;
    if (sRect.h <= 0) sRect.h = 1;

    QBlittablePixmapData *blitPm = static_cast<QBlittablePixmapData*>(pixmap.pixmapData());
    QDirectFbBlitter *dfbBlitter = static_cast<QDirectFbBlitter *>(blitPm->blittable());
    dfbBlitter->unlock();

    IDirectFBSurface *s = dfbBlitter->m_surface.data();

    DFBSurfaceBlittingFlags blittingFlags = DFBSurfaceBlittingFlags(DSBLIT_BLEND_ALPHACHANNEL);
    DFBSurfacePorterDuffRule porterDuff = (cmode == QPainter::CompositionMode_SourceOver) ? DSPD_SRC_OVER : DSPD_SRC;

    if (opacity != 1.0)
    {
        blittingFlags = DFBSurfaceBlittingFlags(blittingFlags | DSBLIT_BLEND_COLORALPHA | (m_premult ? DSBLIT_SRC_PREMULTCOLOR : 0));
        m_surface->SetColor(m_surface.data(), 0xff, 0xff, 0xff, (u8) (opacity * 255.0));
    }

    m_surface->SetBlittingFlags(m_surface.data(), DFBSurfaceBlittingFlags(blittingFlags));
    m_surface->SetPorterDuff(m_surface.data(), porterDuff);

    if (cmode == QPainter::CompositionMode_SourceOver)
        m_surface->SetDstBlendFunction(m_surface.data(), DSBF_INVSRCALPHA);

    if ((sRect.w == dRect.w) && (sRect.h == dRect.h))
        result = m_surface->Blit(m_surface.data(), s, &sRect, dRect.x, dRect.y);
    else
        result = m_surface->StretchBlit(m_surface.data(), s, &sRect, &dRect);

    if (result != DFB_OK)
        DirectFBError("QDirectFBBlitter::drawPixmapExtended()", result);
}

void QVGPixmapConvolutionFilter::draw
        (QPainter *painter, const QPointF &dest,
         const QPixmap &src, const QRectF &srcRect) const
{
    if (src.isNull())
        return;

    if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
        // The pixmap data is not an instance of QVGPixmapData, so fall
        // back to the default convolution filter implementation.
        QPixmapConvolutionFilter::draw(painter, dest, src, srcRect);
        return;
    }

    QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());

    VGImage srcImage = pd->toVGImage();
    if (srcImage == VG_INVALID_HANDLE)
        return;

    QSize size = pd->size();
    VGImage dstImage = QVGImagePool::instance()->createTemporaryImage
        (VG_sARGB_8888_PRE, size.width(), size.height(),
         VG_IMAGE_QUALITY_FASTER, pd);
    if (dstImage == VG_INVALID_HANDLE)
        return;

    int kernelWidth = rows();
    int kernelHeight = columns();
    const qreal *kern = convolutionKernel();
    QVarLengthArray<VGshort> kernel;
    for (int i = 0; i < kernelWidth; ++i) {
        for (int j = 0; j < kernelHeight; ++j) {
            kernel.append((VGshort)(kern[j * kernelWidth + i] * 1024.0f));
        }
    }

    VGfloat values[4];
    values[0] = 0.0f;
    values[1] = 0.0f;
    values[2] = 0.0f;
    values[3] = 0.0f;
    vgSetfv(VG_TILE_FILL_COLOR, 4, values);

    vgConvolve(dstImage, srcImage,
               kernelWidth, kernelHeight, 0, 0,
               kernel.constData(), 1.0f / 1024.0f, 0.0f,
               VG_TILE_FILL);

    VGImage child = VG_INVALID_HANDLE;

    if (srcRect.isNull() ||
        (srcRect.topLeft().isNull() && srcRect.size() == size)) {
        child = dstImage;
    } else {
        QRect src = srcRect.toRect();
        child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
    }

    qt_vg_drawVGImage(painter, dest, child);

    if(child != dstImage)
        vgDestroyImage(child);
    QVGImagePool::instance()->releaseImage(0, dstImage);
}