Example #1
0
bool GiGraphics::setClipBox(const RECT_2D& rc)
{
    if (m_impl->drawRefcnt < 1)
        return false;

    bool ret = false;
    Box2d rect;

    if (!rect.intersectWith(Box2d(rc), Box2d(m_impl->clipBox0)).isEmpty())
    {
        if (rect != Box2d(m_impl->clipBox))
        {
            rect.get(m_impl->clipBox);
            m_impl->rectDraw.set(Box2d(rc));
            m_impl->rectDraw.inflate(GiGraphicsImpl::CLIP_INFLATE);
            m_impl->rectDrawM = m_impl->rectDraw * xf().displayToModel();
            m_impl->rectDrawW = m_impl->rectDrawM * xf().modelToWorld();
            SafeCall(m_impl->canvas, clipRect(m_impl->clipBox.left, m_impl->clipBox.top,
                                              m_impl->clipBox.width(),
                                              m_impl->clipBox.height()));
        }
        ret = true;
    }

    return ret;
}
Example #2
0
bool GiGraphics::setClipWorld(const Box2d& rectWorld)
{
    bool ret = false;

    if (isDrawing() && !rectWorld.isEmpty())
    {
        Box2d box (rectWorld * xf().worldToDisplay());

        box.intersectWith(Box2d(m_impl->clipBox0));
        if (!box.isEmpty(Tol(1, 0)))
        {
            if (box != Box2d(m_impl->clipBox))
            {
                box.get(m_impl->clipBox);
                m_impl->rectDraw = box;
                m_impl->rectDraw.inflate(GiGraphicsImpl::CLIP_INFLATE);
                m_impl->rectDrawM = m_impl->rectDraw * xf().displayToModel();
                m_impl->rectDrawW = m_impl->rectDrawM * xf().modelToWorld();
                SafeCall(m_impl->canvas, _clipBoxChanged(m_impl->clipBox));
            }

            ret = true;
        }
    }

    return ret;
}
Example #3
0
bool GiCanvasGdipImpl::drawImage(G::Bitmap* pBmp, const Box2d& rectW, bool fast)
{
    RECT_2D rc, rcDraw, rcFrom;
    Box2d rect;
    float width = (float)pBmp->GetWidth();
    float height = (float)pBmp->GetHeight();

    // rc: 整个图像对应的显示坐标区域
    (rectW * gs()->xf().worldToDisplay()).get(rc);

    // rcDraw: 图像经剪裁后的可显示部分
    gs()->getClipBox(rcDraw);
    if (rect.intersectWith(Box2d(rc), Box2d(rcDraw)).isEmpty())
        return false;
    rect.get(rcDraw);

    // rcFrom: rcDraw在原始图像上对应的图像范围
    rcFrom.left = (rcDraw.left - rc.left) * width / (rc.right - rc.left);
    rcFrom.top  = (rcDraw.top - rc.top) * height / (rc.bottom - rc.top);
    rcFrom.right = (rcDraw.right - rc.left) * width / (rc.right - rc.left);
    rcFrom.bottom = (rcDraw.bottom - rc.top) * height / (rc.bottom - rc.top);

    // 根据rectW正负决定是否颠倒显示图像
    if (rectW.xmin > rectW.xmax)
        mgSwap(rcDraw.left, rcDraw.right);
    if (rectW.ymin > rectW.ymax)
        mgSwap(rcDraw.top, rcDraw.bottom);

    G::InterpolationMode nOldMode = getDrawGs()->GetInterpolationMode();
    getDrawGs()->SetInterpolationMode( (!fast || gs()->isPrint())
        ? G::InterpolationModeBilinear : G::InterpolationModeLowQuality);

    G::Status ret = getDrawGs()->DrawImage(pBmp, 
        G::RectF(rcDraw.left, rcDraw.top, 
        rcDraw.right - rcDraw.left, 
        rcDraw.bottom - rcDraw.top), 
        rcFrom.left, rcFrom.top, 
        rcFrom.right - rcFrom.left, 
        rcFrom.bottom - rcFrom.top, 
        G::UnitPixel);
    getDrawGs()->SetInterpolationMode(nOldMode);

    return G::Ok == ret;
}