コード例 #1
0
bool RenderSVGResourceGradient::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
    ASSERT(object);
    ASSERT(style);
    ASSERT(context);
    ASSERT(resourceMode != ApplyToDefaultMode);

    // Be sure to synchronize all SVG properties on the gradientElement _before_ processing any further.
    // Otherwhise the call to collectGradientAttributes() in createTileImage(), may cause the SVG DOM property
    // synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
    // GradientData object! Leaving out the line below will cause svg/dynamic-updates/SVG*GradientElement-svgdom* to crash.
    SVGGradientElement* gradientElement = static_cast<SVGGradientElement*>(node());
    if (!gradientElement)
        return false;

    if (m_shouldCollectGradientAttributes) {
        gradientElement->updateAnimatedSVGAttribute(anyQName());
        collectGradientAttributes(gradientElement);
        m_shouldCollectGradientAttributes = false;
    }

    // Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified,
    // then the given effect (e.g. a gradient or a filter) will be ignored.
    FloatRect objectBoundingBox = object->objectBoundingBox();
    if (boundingBoxMode() && objectBoundingBox.isEmpty())
        return false;

    if (!m_gradient.contains(object))
        m_gradient.set(object, new GradientData);

    GradientData* gradientData = m_gradient.get(object);
    bool isPaintingText = resourceMode & ApplyToTextMode;

    // Create gradient object
    if (!gradientData->gradient) {
        buildGradient(gradientData, gradientElement);

        // CG platforms will handle the gradient space transform for text after applying the
        // resource, so don't apply it here. For non-CG platforms, we want the text bounding
        // box applied to the gradient space transform now, so the gradient shader can use it.
#if PLATFORM(CG)
        if (boundingBoxMode() && !objectBoundingBox.isEmpty() && !isPaintingText) {
#else
        if (boundingBoxMode() && !objectBoundingBox.isEmpty()) {
#endif
            gradientData->userspaceTransform.translate(objectBoundingBox.x(), objectBoundingBox.y());
            gradientData->userspaceTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
        }

        AffineTransform gradientTransform;
        calculateGradientTransform(gradientTransform);

        gradientData->userspaceTransform *= gradientTransform;
        gradientData->gradient->setGradientSpaceTransform(gradientData->userspaceTransform);
    }

    if (!gradientData->gradient)
        return false;

    // Draw gradient
    context->save();

    if (isPaintingText) {
#if PLATFORM(CG)
        if (!createMaskAndSwapContextForTextGradient(context, m_savedContext, m_imageBuffer, object)) {
            context->restore();
            return false;
        }
#endif

        context->setTextDrawingMode(resourceMode & ApplyToFillMode ? TextModeFill : TextModeStroke);
    }

    const SVGRenderStyle* svgStyle = style->svgStyle();
    ASSERT(svgStyle);

    if (resourceMode & ApplyToFillMode) {
        context->setAlpha(svgStyle->fillOpacity());
        context->setFillGradient(gradientData->gradient);
        context->setFillRule(svgStyle->fillRule());
    } else if (resourceMode & ApplyToStrokeMode) {
        if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
            gradientData->gradient->setGradientSpaceTransform(transformOnNonScalingStroke(object, gradientData->userspaceTransform));
        context->setAlpha(svgStyle->strokeOpacity());
        context->setStrokeGradient(gradientData->gradient);
        SVGRenderSupport::applyStrokeStyleToContext(context, style, object);
    }

    return true;
}

void RenderSVGResourceGradient::postApplyResource(RenderObject* object, GraphicsContext*& context, unsigned short resourceMode, const Path* path)
{
    ASSERT(context);
    ASSERT(resourceMode != ApplyToDefaultMode);

    if (resourceMode & ApplyToTextMode) {
#if PLATFORM(CG)
        // CG requires special handling for gradient on text
        if (m_savedContext && m_gradient.contains(object)) {
            GradientData* gradientData = m_gradient.get(object);

            // Restore on-screen drawing context
            context = m_savedContext;
            m_savedContext = 0;

            AffineTransform gradientTransform;
            calculateGradientTransform(gradientTransform);

            FloatRect targetRect;
            gradientData->gradient->setGradientSpaceTransform(clipToTextMask(context, m_imageBuffer, targetRect, object, boundingBoxMode(), gradientTransform));
            context->setFillGradient(gradientData->gradient);

            context->fillRect(targetRect);
            m_imageBuffer.clear();
        }
#else
        UNUSED_PARAM(object);
#endif
    } else if (path) {
        if (resourceMode & ApplyToFillMode)
            context->fillPath(*path);
        else if (resourceMode & ApplyToStrokeMode)
            context->strokePath(*path);
    }

    context->restore();
}
コード例 #2
0
bool RenderSVGResourceGradient::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
    ASSERT(object);
    ASSERT(style);
    ASSERT(context);
    ASSERT(resourceMode != ApplyToDefaultMode);

    // Be sure to synchronize all SVG properties on the gradientElement _before_ processing any further.
    // Otherwhise the call to collectGradientAttributes() in createTileImage(), may cause the SVG DOM property
    // synchronization to kick in, which causes invalidateClients() to be called, which in turn deletes our
    // GradientData object! Leaving out the line below will cause svg/dynamic-updates/SVG*GradientElement-svgdom* to crash.
    SVGGradientElement* gradientElement = static_cast<SVGGradientElement*>(node());
    if (!gradientElement)
        return false;

    gradientElement->updateAnimatedSVGAttribute(anyQName());

    if (!m_gradient.contains(object))
        m_gradient.set(object, new GradientData);

    GradientData* gradientData = m_gradient.get(object);

    // Create gradient object
    if (!gradientData->gradient)
        buildGradient(gradientData, gradientElement);

    if (!gradientData->gradient)
        return false;

    // Draw gradient
    context->save();

    bool isPaintingText = resourceMode & ApplyToTextMode;
    if (isPaintingText) {
#if PLATFORM(CG)
        if (!createMaskAndSwapContextForTextGradient(context, m_savedContext, m_imageBuffer, object)) {
            context->restore();
            return false;
        }
#endif

        context->setTextDrawingMode(resourceMode & ApplyToFillMode ? cTextFill : cTextStroke);
    }

    AffineTransform transform;

    // CG platforms will handle the gradient space transform for text after applying the
    // resource, so don't apply it here. For non-CG platforms, we want the text bounding
    // box applied to the gradient space transform now, so the gradient shader can use it.
#if PLATFORM(CG)
    if (gradientData->boundingBoxMode && !isPaintingText) {
#else
    if (gradientData->boundingBoxMode) {
#endif
        FloatRect objectBoundingBox = object->objectBoundingBox();
        transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
        transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
    }

    transform.multiply(gradientData->transform);
    gradientData->gradient->setGradientSpaceTransform(transform);

    const SVGRenderStyle* svgStyle = style->svgStyle();
    ASSERT(svgStyle);

    if (resourceMode & ApplyToFillMode) {
        context->setAlpha(svgStyle->fillOpacity());
        context->setFillGradient(gradientData->gradient);
        context->setFillRule(svgStyle->fillRule());
    } else if (resourceMode & ApplyToStrokeMode) {
        context->setAlpha(svgStyle->strokeOpacity());
        context->setStrokeGradient(gradientData->gradient);
        applyStrokeStyleToContext(context, style, object);
    }

    return true;
}

void RenderSVGResourceGradient::postApplyResource(RenderObject* object, GraphicsContext*& context, unsigned short resourceMode)
{
    ASSERT(context);
    ASSERT(resourceMode != ApplyToDefaultMode);

    if (resourceMode & ApplyToTextMode) {
#if PLATFORM(CG)
        // CG requires special handling for gradient on text
        if (m_savedContext && m_gradient.contains(object)) {
            GradientData* gradientData = m_gradient.get(object);

            // Restore on-screen drawing context
            context = m_savedContext;
            m_savedContext = 0;

            gradientData->gradient->setGradientSpaceTransform(clipToTextMask(context, m_imageBuffer, object, gradientData));
            context->setFillGradient(gradientData->gradient);

            const RenderObject* textRootBlock = findTextRootObject(object);
            context->fillRect(textRootBlock->repaintRectInLocalCoordinates());

            m_imageBuffer.clear();
        }
#else
        UNUSED_PARAM(object);
#endif
    } else {
        if (resourceMode & ApplyToFillMode)
            context->fillPath();
        else if (resourceMode & ApplyToStrokeMode)
            context->strokePath();
    }

    context->restore();
}