C++ QBrush::transform方法代码示例

QString KoOdfGraphicStyles::saveOdfGradientStyle(KoGenStyles &mainStyles, const QBrush &brush)
{
    KoGenStyle gradientStyle;
    if (brush.style() == Qt::RadialGradientPattern) {
        const QRadialGradient *gradient = static_cast<const QRadialGradient*>(brush.gradient());
        gradientStyle = KoGenStyle(KoGenStyle::RadialGradientStyle /*no family name*/);
        gradientStyle.addAttributePercent("svg:cx", gradient->center().x() * 100);
        gradientStyle.addAttributePercent("svg:cy", gradient->center().y() * 100);
        gradientStyle.addAttributePercent("svg:r",  gradient->radius() * 100);
        gradientStyle.addAttributePercent("svg:fx", gradient->focalPoint().x() * 100);
        gradientStyle.addAttributePercent("svg:fy", gradient->focalPoint().y() * 100);
    } else if (brush.style() == Qt::LinearGradientPattern) {
        const QLinearGradient *gradient = static_cast<const QLinearGradient*>(brush.gradient());
        gradientStyle = KoGenStyle(KoGenStyle::LinearGradientStyle /*no family name*/);
        gradientStyle.addAttributePercent("svg:x1", gradient->start().x() * 100);
        gradientStyle.addAttributePercent("svg:y1", gradient->start().y() * 100);
        gradientStyle.addAttributePercent("svg:x2", gradient->finalStop().x() * 100);
        gradientStyle.addAttributePercent("svg:y2", gradient->finalStop().y() * 100);
    } else if (brush.style() == Qt::ConicalGradientPattern) {
        const QConicalGradient * gradient = static_cast<const QConicalGradient*>(brush.gradient());
        gradientStyle = KoGenStyle(KoGenStyle::ConicalGradientStyle /*no family name*/);
        gradientStyle.addAttributePercent("svg:cx", gradient->center().x() * 100);
        gradientStyle.addAttributePercent("svg:cy", gradient->center().y() * 100);
        gradientStyle.addAttribute("draw:angle", QString("%1").arg(gradient->angle()));
    }
    const QGradient * gradient = brush.gradient();
    if (gradient->spread() == QGradient::RepeatSpread)
        gradientStyle.addAttribute("svg:spreadMethod", "repeat");
    else if (gradient->spread() == QGradient::ReflectSpread)
        gradientStyle.addAttribute("svg:spreadMethod", "reflect");
    else
        gradientStyle.addAttribute("svg:spreadMethod", "pad");

    if (! brush.transform().isIdentity()) {
        gradientStyle.addAttribute("svg:gradientTransform", saveTransformation(brush.transform()));
    }

    QBuffer buffer;
    buffer.open(QIODevice::WriteOnly);
    KoXmlWriter elementWriter(&buffer);    // TODO pass indentation level

    // save stops
    QGradientStops stops = gradient->stops();
    Q_FOREACH (const QGradientStop & stop, stops) {
        elementWriter.startElement("svg:stop");
        elementWriter.addAttribute("svg:offset", QString("%1").arg(stop.first));
        elementWriter.addAttribute("svg:stop-color", stop.second.name());
        if (stop.second.alphaF() < 1.0)
            elementWriter.addAttribute("svg:stop-opacity", QString("%1").arg(stop.second.alphaF()));
        elementWriter.endElement();
    }

void QEmulationPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
{
    QPainterState *s = state();

    if (s->bgMode == Qt::OpaqueMode && pen.style() > Qt::SolidLine) {
        QPen bgPen = pen;
        bgPen.setBrush(s->bgBrush);
        bgPen.setStyle(Qt::SolidLine);
        real_engine->stroke(path, bgPen);
    }

    QBrush brush = pen.brush();
    QPen copy = pen;
    Qt::BrushStyle style = qbrush_style(brush);
    if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
        const QGradient *g = brush.gradient();

        if (g->coordinateMode() > QGradient::LogicalMode) {
            if (g->coordinateMode() == QGradient::StretchToDeviceMode) {
                QTransform mat = brush.transform();
                mat.scale(real_engine->painter()->device()->width(), real_engine->painter()->device()->height());
                brush.setTransform(mat);
                copy.setBrush(brush);
                real_engine->stroke(path, copy);
                return;
            } else if (g->coordinateMode() == QGradient::ObjectBoundingMode) {
                QTransform mat = brush.transform();
                QRectF r = path.controlPointRect();
                mat.translate(r.x(), r.y());
                mat.scale(r.width(), r.height());
                brush.setTransform(mat);
                copy.setBrush(brush);
                real_engine->stroke(path, copy);
                return;
            }
        }
    }

    real_engine->stroke(path, pen);
}

void QEmulationPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
{
    QPainterState *s = state();

    if (s->bgMode == Qt::OpaqueMode) {
        Qt::BrushStyle style = brush.style();
        if (style >= Qt::Dense1Pattern && style <= Qt::DiagCrossPattern)
            real_engine->fill(path, s->bgBrush);
    }

    Qt::BrushStyle style = qbrush_style(brush);
    if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
        const QGradient *g = brush.gradient();

        if (g->coordinateMode() > QGradient::LogicalMode) {
            if (g->coordinateMode() == QGradient::StretchToDeviceMode) {
                QBrush copy = brush;
                QTransform mat = copy.transform();
                mat.scale(real_engine->painter()->device()->width(), real_engine->painter()->device()->height());
                copy.setTransform(mat);
                real_engine->fill(path, copy);
                return;
            } else if (g->coordinateMode() == QGradient::ObjectBoundingMode) {
                QBrush copy = brush;
                QTransform mat = copy.transform();
                QRectF r = path.controlPointRect();
                mat.translate(r.x(), r.y());
                mat.scale(r.width(), r.height());
                copy.setTransform(mat);
                real_engine->fill(path, copy);
                return;
            }
        }
    }

    real_engine->fill(path, brush);
}

bool KGradientBackground::loadStyle(KOdfLoadingContext &context, const QSizeF &shapeSize)
{
    Q_D(KGradientBackground);
    KOdfStyleStack &styleStack = context.styleStack();
    if (! styleStack.hasProperty(KOdfXmlNS::draw, "fill"))
        return false;

    QString fillStyle = styleStack.property(KOdfXmlNS::draw, "fill");
    if (fillStyle == "gradient") {
        QBrush brush = KOdf::loadOdfGradientStyle(styleStack, context.stylesReader(), shapeSize);
        const QGradient * gradient = brush.gradient();
        if (gradient) {
            d->gradient = KFlake::cloneGradient(gradient);
            d->matrix = brush.transform();
            return true;
        }
    }
    return false;
}

//.........这里部分代码省略.........
                d->activeStroker->lineTo(path.points()[0], path.points()[1]);

        } else {
            d->activeStroker->moveTo(points[0], points[1]);
            points += 2;
            while (points < lastPoint) {
                d->activeStroker->lineTo(points[0], points[1]);
                points += 2;
            }
            if (path.hasImplicitClose())
                d->activeStroker->lineTo(path.points()[0], path.points()[1]);
        }
        d->activeStroker->end();

        if (!d->strokeHandler->types.size()) // an empty path...
            return;

        QVectorPath strokePath(d->strokeHandler->pts.data(),
                               d->strokeHandler->types.size(),
                               d->strokeHandler->types.data(),
                               flags);
        fill(strokePath, pen.brush());
    } else {
        // For cosmetic pens we need a bit of trickery... We to process xform the input points
        if (state()->matrix.type() >= QTransform::TxProject) {
            QPainterPath painterPath = state()->matrix.map(path.convertToPainterPath());
            d->activeStroker->strokePath(painterPath, d->strokeHandler, QTransform());
        } else {
            d->activeStroker->setCurveThresholdFromTransform(QTransform());
            d->activeStroker->begin(d->strokeHandler);
            if (types) {
                while (points < lastPoint) {
                    switch (*types) {
                    case QPainterPath::MoveToElement: {
                        QPointF pt = (*(QPointF *) points) * state()->matrix;
                        d->activeStroker->moveTo(pt.x(), pt.y());
                        points += 2;
                        ++types;
                        break;
                    }
                    case QPainterPath::LineToElement: {
                        QPointF pt = (*(QPointF *) points) * state()->matrix;
                        d->activeStroker->lineTo(pt.x(), pt.y());
                        points += 2;
                        ++types;
                        break;
                    }
                    case QPainterPath::CurveToElement: {
                        QPointF c1 = ((QPointF *) points)[0] * state()->matrix;
                        QPointF c2 = ((QPointF *) points)[1] * state()->matrix;
                        QPointF e =  ((QPointF *) points)[2] * state()->matrix;
                        d->activeStroker->cubicTo(c1.x(), c1.y(), c2.x(), c2.y(), e.x(), e.y());
                        points += 6;
                        types += 3;
                        flags |= QVectorPath::CurvedShapeMask;
                        break;
                    }
                    default:
                        break;
                    }
                }
                if (path.hasImplicitClose()) {
                    QPointF pt = * ((QPointF *) path.points()) * state()->matrix;
                    d->activeStroker->lineTo(pt.x(), pt.y());
                }

            } else {
                QPointF p = ((QPointF *)points)[0] * state()->matrix;
                d->activeStroker->moveTo(p.x(), p.y());
                points += 2;
                while (points < lastPoint) {
                    QPointF p = ((QPointF *)points)[0] * state()->matrix;
                    d->activeStroker->lineTo(p.x(), p.y());
                    points += 2;
                }
                if (path.hasImplicitClose())
                    d->activeStroker->lineTo(p.x(), p.y());
            }
            d->activeStroker->end();
        }

        QVectorPath strokePath(d->strokeHandler->pts.data(),
                               d->strokeHandler->types.size(),
                               d->strokeHandler->types.data(),
                               flags);

        QTransform xform = state()->matrix;
        state()->matrix = QTransform();
        transformChanged();

        QBrush brush = pen.brush();
        if (qbrush_style(brush) != Qt::SolidPattern)
            brush.setTransform(brush.transform() * xform);

        fill(strokePath, brush);

        state()->matrix = xform;
        transformChanged();
    }
}

void QBlitterPaintEngine::fillRect(const QRectF &rect, const QBrush &brush)
{
    if (rect.size().isEmpty())
        return;

    Q_D(QBlitterPaintEngine);

    if (qbrush_style(brush) == Qt::SolidPattern
        && d->caps.canBlitterAlphaFillRect()) {
        d->fillRect(rect, qbrush_color(brush), true);
    } else if (qbrush_style(brush) == Qt::SolidPattern
        && qbrush_color(brush).alpha() == 0xff
        && d->caps.canBlitterFillRect()) {
        d->fillRect(rect, qbrush_color(brush), false);
    } else if ((brush.style() == Qt::TexturePattern) &&
               (brush.transform().type() <= QTransform::TxTranslate) &&
                ((d->caps.canBlitterDrawPixmapOpacity(brush.texture())) ||
                 (d->caps.canBlitterDrawPixmap(rect, brush.texture(), rect)))) {
        bool rectIsFilled = false;
        QRectF transformedRect = state()->matrix.mapRect(rect);
        qreal x = transformedRect.x();
        qreal y = transformedRect.y();
        QPixmap pm = brush.texture();
        d->unlock();
        int srcX = int(rect.x() - state()->brushOrigin.x() - brush.transform().dx()) % pm.width();
        if (srcX < 0)
            srcX = pm.width() + srcX;
        const int startX = srcX;
        int srcY = int(rect.y() - state()->brushOrigin.y() - brush.transform().dy()) % pm.height();
        if (srcY < 0)
            srcY = pm.height() + srcY;
        while (!rectIsFilled) {
            qreal blitWidth = (pm.width() ) - srcX;
            qreal blitHeight = (pm.height() ) - srcY;
            if (x + blitWidth > transformedRect.right())
                blitWidth = transformedRect.right() -x;
            if (y + blitHeight > transformedRect.bottom())
                blitHeight = transformedRect.bottom() - y;
            const QClipData *clipData = d->clip();
            if (clipData->hasRectClip) {
                QRect targetRect = QRect(x, y, blitWidth, blitHeight).intersected(clipData->clipRect);
                if (targetRect.isValid()) {
                    int tmpSrcX  = srcX + (targetRect.x() - x);
                    int tmpSrcY = srcY + (targetRect.y() - y);
                    QRect srcRect(tmpSrcX, tmpSrcY, targetRect.width(), targetRect.height());
                    d->pmData->blittable()->drawPixmap(targetRect, pm, srcRect);
                }
            } else if (clipData->hasRegionClip) {
                QVector<QRect> clipRects = clipData->clipRegion.rects();
                QRect unclippedTargetRect(x, y, blitWidth, blitHeight);
                QRegion intersectedRects = clipData->clipRegion.intersected(unclippedTargetRect);

                for (int i = 0; i < intersectedRects.rects().size(); ++i) {
                    QRect targetRect = intersectedRects.rects().at(i);
                    if (!targetRect.isValid() || targetRect.isEmpty())
                        continue;
                    int tmpSrcX = srcX + (targetRect.x() - x);
                    int tmpSrcY = srcY + (targetRect.y() - y);
                    QRect srcRect(tmpSrcX, tmpSrcY, targetRect.width(), targetRect.height());
                    d->pmData->blittable()->drawPixmap(targetRect, pm, srcRect);
                }
            }
            x+=blitWidth;
            if (qFuzzyCompare(x, transformedRect.right())) {
                x = transformedRect.x();
                srcX = startX;
                srcY = 0;
                y += blitHeight;
                if (qFuzzyCompare(y, transformedRect.bottom()))
                    rectIsFilled = true;
            } else
                srcX = 0;
        }
    } else {
        d->lock();
        d->pmData->markRasterOverlay(rect);
        QRasterPaintEngine::fillRect(rect, brush);
    }

}

//.........这里部分代码省略.........
        case Qt::SolidPattern:
        {
            ComPtr<ID2D1SolidColorBrush> solid;

            hr = dc()->CreateSolidColorBrush(to_d2d_color_f(newBrush.color()), &solid);
            if (FAILED(hr)) {
                qWarning("%s: Could not create solid color brush: %#x", __FUNCTION__, hr);
                break;
            }

            hr = solid.As(&result);
            if (FAILED(hr))
                qWarning("%s: Could not convert solid color brush: %#x", __FUNCTION__, hr);
        }
            break;

        case Qt::Dense1Pattern:
        case Qt::Dense2Pattern:
        case Qt::Dense3Pattern:
        case Qt::Dense4Pattern:
        case Qt::Dense5Pattern:
        case Qt::Dense6Pattern:
        case Qt::Dense7Pattern:
        case Qt::HorPattern:
        case Qt::VerPattern:
        case Qt::CrossPattern:
        case Qt::BDiagPattern:
        case Qt::FDiagPattern:
        case Qt::DiagCrossPattern:
        {
            ComPtr<ID2D1BitmapBrush1> bitmapBrush;
            D2D1_BITMAP_BRUSH_PROPERTIES1 bitmapBrushProperties = {
                D2D1_EXTEND_MODE_WRAP,
                D2D1_EXTEND_MODE_WRAP,
                interpolationMode()
            };

            QImage brushImg = qt_imageForBrush(newBrush.style(), false);
            brushImg.setColor(0, newBrush.color().rgba());
            brushImg.setColor(1, qRgba(0, 0, 0, 0));

            QWindowsDirect2DBitmap bitmap;
            bool success = bitmap.fromImage(brushImg, Qt::AutoColor);
            if (!success) {
                qWarning("%s: Could not create Direct2D bitmap from Qt pattern brush image", __FUNCTION__);
                break;
            }

            hr = dc()->CreateBitmapBrush(bitmap.bitmap(),
                                         bitmapBrushProperties,
                                         &bitmapBrush);
            if (FAILED(hr)) {
                qWarning("%s: Could not create Direct2D bitmap brush for Qt pattern brush: %#x", __FUNCTION__, hr);
                break;
            }

            hr = bitmapBrush.As(&result);
            if (FAILED(hr))
                qWarning("%s: Could not convert Direct2D bitmap brush for Qt pattern brush: %#x", __FUNCTION__, hr);
        }
            break;

        case Qt::LinearGradientPattern:
        case Qt::RadialGradientPattern:
        case Qt::ConicalGradientPattern:
            *needsEmulation = true;
            break;

        case Qt::TexturePattern:
        {
            ComPtr<ID2D1BitmapBrush1> bitmapBrush;
            D2D1_BITMAP_BRUSH_PROPERTIES1 bitmapBrushProperties = {
                D2D1_EXTEND_MODE_WRAP,
                D2D1_EXTEND_MODE_WRAP,
                interpolationMode()
            };

            QWindowsDirect2DPlatformPixmap *pp = static_cast<QWindowsDirect2DPlatformPixmap *>(newBrush.texture().handle());
            QWindowsDirect2DBitmap *bitmap = pp->bitmap();
            hr = dc()->CreateBitmapBrush(bitmap->bitmap(),
                                         bitmapBrushProperties,
                                         &bitmapBrush);

            if (FAILED(hr)) {
                qWarning("%s: Could not create texture brush: %#x", __FUNCTION__, hr);
                break;
            }

            hr = bitmapBrush.As(&result);
            if (FAILED(hr))
                qWarning("%s: Could not convert texture brush: %#x", __FUNCTION__, hr);
        }
            break;
        }

        if (result && !newBrush.transform().isIdentity())
            result->SetTransform(to_d2d_matrix_3x2_f(newBrush.transform()));

        return result;
    }