C++ FloatRect::width方法代码示例

FloatRect GraphicsContext::roundToDevicePixels(const FloatRect& frect)
{
    FloatRect result;
    double x = frect.x();
    double y = frect.y();
    cairo_t* cr = m_data->cr;
    cairo_user_to_device(cr, &x, &y);
    x = round(x);
    y = round(y);
    cairo_device_to_user(cr, &x, &y);
    result.setX(static_cast<float>(x));
    result.setY(static_cast<float>(y));
    x = frect.width();
    y = frect.height();
    cairo_user_to_device_distance(cr, &x, &y);
    x = round(x);
    y = round(y);
    cairo_device_to_user_distance(cr, &x, &y);
    result.setWidth(static_cast<float>(x));
    result.setHeight(static_cast<float>(y));
    return result;
}

bool SVGClipPainter::drawClipAsMask(GraphicsContext& context, const LayoutObject& layoutObject, const FloatRect& targetBoundingBox, const FloatRect& targetPaintInvalidationRect, const AffineTransform& localTransform)
{
    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutObject, DisplayItem::SVGClip))
        return true;

    SkPictureBuilder maskPictureBuilder(targetPaintInvalidationRect, nullptr, &context);
    GraphicsContext& maskContext = maskPictureBuilder.context();
    {
        TransformRecorder recorder(maskContext, layoutObject, localTransform);

        // Create a clipPathClipper if this clipPath is clipped by another clipPath.
        SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(&m_clip);
        LayoutSVGResourceClipper* clipPathClipper = resources ? resources->clipper() : nullptr;
        ClipperState clipPathClipperState = ClipperNotApplied;
        if (clipPathClipper && !SVGClipPainter(*clipPathClipper).prepareEffect(m_clip, targetBoundingBox, targetPaintInvalidationRect, maskContext, clipPathClipperState))
            return false;

        {
            AffineTransform contentTransform;
            if (m_clip.clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
                contentTransform.translate(targetBoundingBox.x(), targetBoundingBox.y());
                contentTransform.scaleNonUniform(targetBoundingBox.width(), targetBoundingBox.height());
            }
            SubtreeContentTransformScope contentTransformScope(contentTransform);

            TransformRecorder contentTransformRecorder(maskContext, layoutObject, contentTransform);
            RefPtr<const SkPicture> clipContentPicture = m_clip.createContentPicture();
            maskContext.getPaintController().createAndAppend<DrawingDisplayItem>(layoutObject, DisplayItem::SVGClip, clipContentPicture.get());
        }

        if (clipPathClipper)
            SVGClipPainter(*clipPathClipper).finishEffect(m_clip, maskContext, clipPathClipperState);
    }

    LayoutObjectDrawingRecorder drawingRecorder(context, layoutObject, DisplayItem::SVGClip, targetPaintInvalidationRect);
    RefPtr<SkPicture> maskPicture = maskPictureBuilder.endRecording();
    context.drawPicture(maskPicture.get());
    return true;
}

bool RenderSVGResourceMasker::drawContentIntoMaskImage(MaskerData* maskerData, ColorSpace colorSpace, RenderObject* object)
{
    GraphicsContext* maskImageContext = maskerData->maskImage->context();
    ASSERT(maskImageContext);

    // Eventually adjust the mask image context according to the target objectBoundingBox.
    AffineTransform maskContentTransformation;
    if (maskElement().maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
        FloatRect objectBoundingBox = object->objectBoundingBox();
        maskContentTransformation.translate(objectBoundingBox.x(), objectBoundingBox.y());
        maskContentTransformation.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
        maskImageContext->concatCTM(maskContentTransformation);
    }

    // Draw the content into the ImageBuffer.
    for (auto& child : childrenOfType<SVGElement>(maskElement())) {
        auto renderer = child.renderer();
        if (!renderer)
            continue;
        if (renderer->needsLayout())
            return false;
        const RenderStyle& style = renderer->style();
        if (style.display() == NONE || style.visibility() != VISIBLE)
            continue;
        SVGRenderingContext::renderSubtreeToImageBuffer(maskerData->maskImage.get(), *renderer, maskContentTransformation);
    }

#if !USE(CG)
    maskerData->maskImage->transformColorSpace(ColorSpaceDeviceRGB, colorSpace);
#else
    UNUSED_PARAM(colorSpace);
#endif

    // Create the luminance mask.
    if (style().svgStyle().maskType() == MT_LUMINANCE)
        maskerData->maskImage->convertToLuminanceMask();

    return true;
}

bool SVGImageBufferTools::createImageBuffer(const FloatRect& absoluteTargetRect, const FloatRect& clampedAbsoluteTargetRect, OwnPtr<ImageBuffer>& imageBuffer, ColorSpace colorSpace, RenderingMode renderingMode)
{
    IntSize imageSize(roundedImageBufferSize(clampedAbsoluteTargetRect.size()));
    IntSize unclampedImageSize(SVGImageBufferTools::roundedImageBufferSize(absoluteTargetRect.size()));

    // Don't create empty ImageBuffers.
    if (imageSize.isEmpty())
        return false;

    OwnPtr<ImageBuffer> image = ImageBuffer::create(imageSize, colorSpace, renderingMode);
    if (!image)
        return false;

    GraphicsContext* imageContext = image->context();
    ASSERT(imageContext);

    // Compensate rounding effects, as the absolute target rect is using floating-point numbers and the image buffer size is integer.
    imageContext->scale(FloatSize(unclampedImageSize.width() / absoluteTargetRect.width(), unclampedImageSize.height() / absoluteTargetRect.height()));

    imageBuffer = image.release();
    return true;
}

bool LayoutSVGResourceClipper::asPath(
    const AffineTransform& animatedLocalTransform,
    const FloatRect& referenceBox,
    Path& clipPath) {
  if (!calculateClipContentPathIfNeeded())
    return false;

  clipPath = m_clipContentPath;

  // We are able to represent the clip as a path. Continue with direct clipping,
  // and transform the content to userspace if necessary.
  if (clipPathUnits() == SVGUnitTypes::kSvgUnitTypeObjectboundingbox) {
    AffineTransform transform;
    transform.translate(referenceBox.x(), referenceBox.y());
    transform.scaleNonUniform(referenceBox.width(), referenceBox.height());
    clipPath.transform(transform);
  }

  // Transform path by animatedLocalTransform.
  clipPath.transform(animatedLocalTransform);
  return true;
}

PassRefPtr<const SkPicture> LayoutSVGResourceMasker::createContentPicture(AffineTransform& contentTransformation, const FloatRect& targetBoundingBox,
    GraphicsContext& context)
{
    SVGUnitTypes::SVGUnitType contentUnits = toSVGMaskElement(element())->maskContentUnits()->currentValue()->enumValue();
    if (contentUnits == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
        contentTransformation.translate(targetBoundingBox.x(), targetBoundingBox.y());
        contentTransformation.scaleNonUniform(targetBoundingBox.width(), targetBoundingBox.height());
    }

    if (m_maskContentPicture)
        return m_maskContentPicture;

    SubtreeContentTransformScope contentTransformScope(contentTransformation);

    // Using strokeBoundingBox (instead of paintInvalidationRectInLocalCoordinates) to avoid the intersection
    // with local clips/mask, which may yield incorrect results when mixing objectBoundingBox and
    // userSpaceOnUse units (http://crbug.com/294900).
    FloatRect bounds = strokeBoundingBox();

    SkPictureBuilder pictureBuilder(bounds, nullptr, &context);

    ColorFilter maskContentFilter = style()->svgStyle().colorInterpolation() == CI_LINEARRGB
        ? ColorFilterSRGBToLinearRGB : ColorFilterNone;
    pictureBuilder.context().setColorFilter(maskContentFilter);

    for (SVGElement* childElement = Traversal<SVGElement>::firstChild(*element()); childElement; childElement = Traversal<SVGElement>::nextSibling(*childElement)) {
        LayoutObject* layoutObject = childElement->layoutObject();
        if (!layoutObject)
            continue;
        const ComputedStyle* style = layoutObject->style();
        if (!style || style->display() == NONE || style->visibility() != VISIBLE)
            continue;

        SVGPaintContext::paintSubtree(pictureBuilder.context(), layoutObject);
    }

    m_maskContentPicture = pictureBuilder.endRecording();
    return m_maskContentPicture;
}

void RenderPath::paint(PaintInfo& paintInfo, int, int)
{
    if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || m_path.isEmpty())
        return;

    FloatRect boundingBox = repaintRectInLocalCoordinates();
    if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(boundingBox, m_localTransform, paintInfo))
        return;

    PaintInfo childPaintInfo(paintInfo);
    bool drawsOutline = style()->outlineWidth() && (childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline);
    if (drawsOutline || childPaintInfo.phase == PaintPhaseForeground) {
        childPaintInfo.context->save();
        childPaintInfo.applyTransform(m_localTransform);

        if (childPaintInfo.phase == PaintPhaseForeground) {
            PaintInfo savedInfo(childPaintInfo);

            if (SVGRenderSupport::prepareToRenderSVGContent(this, childPaintInfo)) {
                const SVGRenderStyle* svgStyle = style()->svgStyle();
                if (svgStyle->shapeRendering() == SR_CRISPEDGES)
                    childPaintInfo.context->setShouldAntialias(false);

                fillAndStrokePath(childPaintInfo.context);

                if (svgStyle->hasMarkers())
                    m_markerLayoutInfo.drawMarkers(childPaintInfo);
            }

            SVGRenderSupport::finishRenderSVGContent(this, childPaintInfo, savedInfo.context);
        }

        if (drawsOutline)
            paintOutline(childPaintInfo.context, static_cast<int>(boundingBox.x()), static_cast<int>(boundingBox.y()),
                static_cast<int>(boundingBox.width()), static_cast<int>(boundingBox.height()));
        
        childPaintInfo.context->restore();
    }
}

void showLineLayoutForFlow(const RenderBlockFlow& flow, const Layout& layout, int depth)
{
    int printedCharacters = 0;
    printPrefix(printedCharacters, depth);

    fprintf(stderr, "SimpleLineLayout (%u lines, %u runs) (%p)\n", layout.lineCount(), layout.runCount(), &layout);
    ++depth;

    auto resolver = runResolver(flow, layout);
    for (auto it = resolver.begin(), end = resolver.end(); it != end; ++it) {
        const auto& run = *it;
        FloatRect rect = run.rect();
        printPrefix(printedCharacters, depth);
        if (run.start() < run.end()) {
            fprintf(stderr, "line %u run(%u, %u) (%.2f, %.2f) (%.2f, %.2f) \"%s\"\n", run.lineIndex(), run.start(), run.end(),
                rect.x(), rect.y(), rect.width(), rect.height(), run.text().toStringWithoutCopying().utf8().data());
        } else {
            ASSERT(run.start() == run.end());
            fprintf(stderr, "line break %u run(%u, %u) (%.2f, %.2f) (%.2f, %.2f)\n", run.lineIndex(), run.start(), run.end(), rect.x(), rect.y(), rect.width(), rect.height());
        }
    }
}

void PlatformContextCairo::clipForPatternFilling(const GraphicsContextState& state)
{
    ASSERT(state.fillPattern);

    // Hold current cairo path in a variable for restoring it after configuring the pattern clip rectangle.
    auto currentPath = cairo_copy_path(m_cr.get());
    cairo_new_path(m_cr.get());

    // Initialize clipping extent from current cairo clip extents, then shrink if needed according to pattern.
    // Inspired by GraphicsContextQt::drawRepeatPattern.
    double x1, y1, x2, y2;
    cairo_clip_extents(m_cr.get(), &x1, &y1, &x2, &y2);
    FloatRect clipRect(x1, y1, x2 - x1, y2 - y1);

    Image* patternImage = state.fillPattern->tileImage();
    ASSERT(patternImage);
    const AffineTransform& patternTransform = state.fillPattern->getPatternSpaceTransform();
    FloatRect patternRect = patternTransform.mapRect(FloatRect(0, 0, patternImage->width(), patternImage->height()));

    bool repeatX = state.fillPattern->repeatX();
    bool repeatY = state.fillPattern->repeatY();

    if (!repeatX) {
        clipRect.setX(patternRect.x());
        clipRect.setWidth(patternRect.width());
    }
    if (!repeatY) {
        clipRect.setY(patternRect.y());
        clipRect.setHeight(patternRect.height());
    }
    if (!repeatX || !repeatY) {
        cairo_rectangle(m_cr.get(), clipRect.x(), clipRect.y(), clipRect.width(), clipRect.height());
        cairo_clip(m_cr.get());
    }

    // Restoring cairo path.
    cairo_append_path(m_cr.get(), currentPath);
    cairo_path_destroy(currentPath);
}

void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, CompositeOperator op)
{    
    if (mayFillWithSolidColor()) {
        fillWithSolidColor(ctxt, destRect, solidColor(), op);
        return;
    }

    FloatSize intrinsicTileSize = size();
    if (hasRelativeWidth())
        intrinsicTileSize.setWidth(scaledTileSize.width());
    if (hasRelativeHeight())
        intrinsicTileSize.setHeight(scaledTileSize.height());

    FloatSize scale(scaledTileSize.width() / intrinsicTileSize.width(),
                    scaledTileSize.height() / intrinsicTileSize.height());
    AffineTransform patternTransform = AffineTransform().scale(scale.width(), scale.height());

    FloatRect oneTileRect;
    oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), scaledTileSize.width()) - scaledTileSize.width(), scaledTileSize.width()));
    oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), scaledTileSize.height()) - scaledTileSize.height(), scaledTileSize.height()));
    oneTileRect.setSize(scaledTileSize);
    
    // Check and see if a single draw of the image can cover the entire area we are supposed to tile.    
    if (oneTileRect.contains(destRect)) {
        FloatRect visibleSrcRect;
        visibleSrcRect.setX((destRect.x() - oneTileRect.x()) / scale.width());
        visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height());
        visibleSrcRect.setWidth(destRect.width() / scale.width());
        visibleSrcRect.setHeight(destRect.height() / scale.height());
        draw(ctxt, destRect, visibleSrcRect, op);
        return;
    }

    FloatRect tileRect(FloatPoint(), intrinsicTileSize);    
    drawPattern(ctxt, tileRect, patternTransform, oneTileRect.location(), op, destRect);
    
    startAnimation();
}

LayoutRect RenderMathMLOperator::paintCharacter(PaintInfo& info, UChar character, const LayoutPoint& origin, CharacterPaintTrimming trim)
{
    GlyphData data = style()->font().glyphDataForCharacter(character, false);
    FloatRect glyphBounds = data.fontData->boundsForGlyph(data.glyph);

    LayoutRect glyphPaintRect(origin, LayoutSize(glyphBounds.x() + glyphBounds.width(), glyphBounds.height()));
    glyphPaintRect.setY(origin.y() + glyphBounds.y());

    // In order to have glyphs fit snugly with one another we snap the connecting edges to pixel boundaries
    // and trim off one pixel. The pixel trim is to account for fonts that have edge pixels that have less
    // than full coverage. These edge pixels can introduce small seams between connected glyphs
    FloatRect clipBounds = info.rect;
    switch (trim) {
    case TrimTop:
        glyphPaintRect.shiftYEdgeTo(glyphPaintRect.y().ceil() + 1);
        clipBounds.shiftYEdgeTo(glyphPaintRect.y());
        break;
    case TrimBottom:
        glyphPaintRect.shiftMaxYEdgeTo(glyphPaintRect.maxY().floor() - 1);
        clipBounds.shiftMaxYEdgeTo(glyphPaintRect.maxY());
        break;
    case TrimTopAndBottom:
        LayoutUnit temp = glyphPaintRect.y() + 1;
        glyphPaintRect.shiftYEdgeTo(temp.ceil());
        glyphPaintRect.shiftMaxYEdgeTo(glyphPaintRect.maxY().floor() - 1);
        clipBounds.shiftYEdgeTo(glyphPaintRect.y());
        clipBounds.shiftMaxYEdgeTo(glyphPaintRect.maxY());
        break;
    }

    // Clipping the enclosing IntRect avoids any potential issues at joined edges.
    GraphicsContextStateSaver stateSaver(*info.context);
    info.context->clip(clipBounds);

    info.context->drawText(style()->font(), TextRun(&character, 1), origin);

    return glyphPaintRect;
}

void RenderPath::paint(PaintInfo& paintInfo, int, int)
{
    if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || m_path.isEmpty())
        return;

    FloatRect boundingBox = repaintRectInLocalCoordinates();
    FloatRect nonLocalBoundingBox = m_localTransform.mapRect(boundingBox);
    // FIXME: The empty rect check is to deal with incorrect initial clip in renderSubtreeToImage
    // unfortunately fixing that problem is fairly complex unless we were willing to just futz the
    // rect to something "close enough"
    if (!nonLocalBoundingBox.intersects(paintInfo.rect) && !paintInfo.rect.isEmpty())
        return;

    PaintInfo childPaintInfo(paintInfo);
    childPaintInfo.context->save();
    applyTransformToPaintInfo(childPaintInfo, m_localTransform);
    SVGResourceFilter* filter = 0;

    if (childPaintInfo.phase == PaintPhaseForeground) {
        PaintInfo savedInfo(childPaintInfo);

        if (prepareToRenderSVGContent(this, childPaintInfo, boundingBox, filter)) {
            if (style()->svgStyle()->shapeRendering() == SR_CRISPEDGES)
                childPaintInfo.context->setShouldAntialias(false);
            fillAndStrokePath(m_path, childPaintInfo.context, style(), this);

            if (static_cast<SVGStyledElement*>(node())->supportsMarkers())
                m_markerLayoutInfo.drawMarkers(childPaintInfo);
        }
        finishRenderSVGContent(this, childPaintInfo, filter, savedInfo.context);
    }

    if ((childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
        paintOutline(childPaintInfo.context, static_cast<int>(boundingBox.x()), static_cast<int>(boundingBox.y()),
            static_cast<int>(boundingBox.width()), static_cast<int>(boundingBox.height()), style());
    
    childPaintInfo.context->restore();
}

FloatRect FilterEffect::determineFilterPrimitiveSubregion()
{
    ASSERT(filter());

    // FETile, FETurbulence, FEFlood don't have input effects, take the filter region as unite rect.
    FloatRect subregion;
    if (unsigned numberOfInputEffects = inputEffects().size()) {
        subregion = inputEffect(0)->determineFilterPrimitiveSubregion();
        for (unsigned i = 1; i < numberOfInputEffects; ++i)
            subregion.unite(inputEffect(i)->determineFilterPrimitiveSubregion());
    } else
        subregion = filter()->filterRegion();

    // After calling determineFilterPrimitiveSubregion on the target effect, reset the subregion again for <feTile>.
    if (filterEffectType() == FilterEffectTypeTile)
        subregion = filter()->filterRegion();

    subregion = mapRect(subregion);

    FloatRect boundaries = effectBoundaries();
    if (hasX())
        subregion.setX(boundaries.x());
    if (hasY())
        subregion.setY(boundaries.y());
    if (hasWidth())
        subregion.setWidth(boundaries.width());
    if (hasHeight())
        subregion.setHeight(boundaries.height());

    setFilterPrimitiveSubregion(subregion);

    FloatRect absoluteSubregion = filter()->absoluteTransform().mapRect(subregion);
    FloatSize filterResolution = filter()->filterResolution();
    absoluteSubregion.scale(filterResolution.width(), filterResolution.height());

    setMaxEffectRect(absoluteSubregion);
    return subregion;
}

FloatRect RenderSVGResourceMasker::resourceBoundingBox(const RenderObject& object)
{
    FloatRect objectBoundingBox = object.objectBoundingBox();
    FloatRect maskBoundaries = SVGLengthContext::resolveRectangle<SVGMaskElement>(&maskElement(), maskElement().maskUnits(), objectBoundingBox);

    // Resource was not layouted yet. Give back clipping rect of the mask.
    if (selfNeedsLayout())
        return maskBoundaries;

    if (m_maskContentBoundaries.isEmpty())
        calculateMaskContentRepaintRect();

    FloatRect maskRect = m_maskContentBoundaries;
    if (maskElement().maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
        AffineTransform transform;
        transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
        transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
        maskRect = transform.mapRect(maskRect);
    }

    maskRect.intersect(maskBoundaries);
    return maskRect;
}

bool RenderThemeWinCE::paintMediaPlayButton(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
{
    bool rc = paintButton(o, paintInfo, r);
    FloatRect imRect = r;
    imRect.inflate(-3);
    paintInfo.context->save();
    paintInfo.context->setStrokeColor(Color::black);
    paintInfo.context->setFillColor(Color::black);
    HTMLMediaElement* mediaElement = mediaElementParent(o->node());
    bool paused = !mediaElement || mediaElement->paused();
    if (paused) {
        float width = imRect.width();
        imRect.setWidth(width / 3.0);
        paintInfo.context->fillRect(imRect);
        imRect.move(2.0 * width / 3.0, 0);
        paintInfo.context->fillRect(imRect);
    } else {
        FloatPoint pts[3] = { FloatPoint(imRect.x(), imRect.y()), FloatPoint(imRect.maxX(), (imRect.y() + imRect.maxY()) / 2.0), FloatPoint(imRect.x(), imRect.maxY()) };
        paintInfo.context->drawConvexPolygon(3, pts);
    }
    paintInfo.context->restore();
    return rc;
}