void Path::translate(const FloatSize& size)
{
QTransform matrix;
matrix.translate(size.width(), size.height());
m_path = m_path * matrix;
}
void Path::addBeziersForRoundedRect(const FloatRect& rect, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius)
{
moveTo(FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
addLineTo(FloatPoint(rect.maxX() - topRightRadius.width(), rect.y()));
if (topRightRadius.width() > 0 || topRightRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.maxX() - topRightRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.maxX(), rect.y() + topRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.maxX(), rect.y() + topRightRadius.height()));
addLineTo(FloatPoint(rect.maxX(), rect.maxY() - bottomRightRadius.height()));
if (bottomRightRadius.width() > 0 || bottomRightRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.maxX(), rect.maxY() - bottomRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.maxX() - bottomRightRadius.width() * gCircleControlPoint, rect.maxY()),
FloatPoint(rect.maxX() - bottomRightRadius.width(), rect.maxY()));
addLineTo(FloatPoint(rect.x() + bottomLeftRadius.width(), rect.maxY()));
if (bottomLeftRadius.width() > 0 || bottomLeftRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.x() + bottomLeftRadius.width() * gCircleControlPoint, rect.maxY()),
FloatPoint(rect.x(), rect.maxY() - bottomLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x(), rect.maxY() - bottomLeftRadius.height()));
addLineTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height()));
if (topLeftRadius.width() > 0 || topLeftRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x() + topLeftRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
closeSubpath();
}
float computeMinimumScaleFactorForContentContained(const ViewportAttributes& result, const IntSize& visibleViewport, const IntSize& contentsSize, float devicePixelRatio)
{
FloatSize viewportSize = convertToUserSpace(visibleViewport, devicePixelRatio);
return max<float>(result.minimumScale, max(viewportSize.width() / contentsSize.width(), viewportSize.height() / contentsSize.height()));
}
static inline int resolveHeightForRatio(int width, const FloatSize& intrinsicRatio)
{
return ceilf(width * intrinsicRatio.height() / intrinsicRatio.width());
}
void Image::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
{
intrinsicRatio = size();
intrinsicWidth = Length(intrinsicRatio.width(), Fixed);
intrinsicHeight = Length(intrinsicRatio.height(), Fixed);
}
static PassOwnPtr<Shape> createEllipseShape(const FloatPoint& center, const FloatSize& radii)
{
ASSERT(radii.width() >= 0 && radii.height() >= 0);
return adoptPtr(new RectangleShape(FloatRect(center.x() - radii.width(), center.y() - radii.height(), radii.width()*2, radii.height()*2), radii));
}
void PrintContext::computePageRectsWithPageSizeInternal(const FloatSize& pageSizeInPixels, bool allowInlineDirectionTiling)
{
if (!m_frame->document() || !m_frame->view() || !m_frame->document()->renderView())
return;
RenderView* view = m_frame->document()->renderView();
IntRect docRect = view->documentRect();
int pageWidth = pageSizeInPixels.width();
int pageHeight = pageSizeInPixels.height();
bool isHorizontal = view->style()->isHorizontalWritingMode();
int docLogicalHeight = isHorizontal ? docRect.height() : docRect.width();
int pageLogicalHeight = isHorizontal ? pageHeight : pageWidth;
int pageLogicalWidth = isHorizontal ? pageWidth : pageHeight;
int inlineDirectionStart;
int inlineDirectionEnd;
int blockDirectionStart;
int blockDirectionEnd;
if (isHorizontal) {
if (view->style()->isFlippedBlocksWritingMode()) {
blockDirectionStart = docRect.maxY();
blockDirectionEnd = docRect.y();
} else {
blockDirectionStart = docRect.y();
blockDirectionEnd = docRect.maxY();
}
inlineDirectionStart = view->style()->isLeftToRightDirection() ? docRect.x() : docRect.maxX();
inlineDirectionEnd = view->style()->isLeftToRightDirection() ? docRect.maxX() : docRect.x();
} else {
if (view->style()->isFlippedBlocksWritingMode()) {
blockDirectionStart = docRect.maxX();
blockDirectionEnd = docRect.x();
} else {
blockDirectionStart = docRect.x();
blockDirectionEnd = docRect.maxX();
}
inlineDirectionStart = view->style()->isLeftToRightDirection() ? docRect.y() : docRect.maxY();
inlineDirectionEnd = view->style()->isLeftToRightDirection() ? docRect.maxY() : docRect.y();
}
unsigned pageCount = ceilf((float)docLogicalHeight / pageLogicalHeight);
for (unsigned i = 0; i < pageCount; ++i) {
int pageLogicalTop = blockDirectionEnd > blockDirectionStart ?
blockDirectionStart + i * pageLogicalHeight :
blockDirectionStart - (i + 1) * pageLogicalHeight;
if (allowInlineDirectionTiling) {
for (int currentInlinePosition = inlineDirectionStart;
inlineDirectionEnd > inlineDirectionStart ? currentInlinePosition < inlineDirectionEnd : currentInlinePosition > inlineDirectionEnd;
currentInlinePosition += (inlineDirectionEnd > inlineDirectionStart ? pageLogicalWidth : -pageLogicalWidth)) {
int pageLogicalLeft = inlineDirectionEnd > inlineDirectionStart ? currentInlinePosition : currentInlinePosition - pageLogicalWidth;
IntRect pageRect(pageLogicalLeft, pageLogicalTop, pageLogicalWidth, pageLogicalHeight);
if (!isHorizontal)
pageRect = pageRect.transposedRect();
m_pageRects.append(pageRect);
}
} else {
int pageLogicalLeft = inlineDirectionEnd > inlineDirectionStart ? inlineDirectionStart : inlineDirectionStart - pageLogicalWidth;
IntRect pageRect(pageLogicalLeft, pageLogicalTop, pageLogicalWidth, pageLogicalHeight);
if (!isHorizontal)
pageRect = pageRect.transposedRect();
m_pageRects.append(pageRect);
}
}
}
inline static float perpProduct(const FloatSize& u, const FloatSize& v)
{
return u.width() * v.height() - u.height() * v.width();
}
inline static float innerProduct(const FloatSize& u, const FloatSize& v)
{
return u.width() * v.width() + u.height() * v.height();
}
void Path::translate(const FloatSize& size)
{
AffineTransform transformation;
transformation.translate(size.width(), size.height());
transform(transformation);
}
static Frame* createWindow(Frame* openerFrame, Frame* lookupFrame, const FrameLoadRequest& request, const WindowFeatures& features, NavigationPolicy policy, ShouldSendReferrer shouldSendReferrer, bool& created)
{
ASSERT(!features.dialog || request.frameName().isEmpty());
if (!request.frameName().isEmpty() && request.frameName() != "_blank" && policy == NavigationPolicyIgnore) {
if (Frame* frame = lookupFrame->loader().findFrameForNavigation(request.frameName(), openerFrame->document())) {
if (request.frameName() != "_self")
frame->page()->focusController().setFocusedFrame(frame);
created = false;
return frame;
}
}
// Sandboxed frames cannot open new auxiliary browsing contexts.
if (openerFrame->document()->isSandboxed(SandboxPopups)) {
// FIXME: This message should be moved off the console once a solution to https://bugs.webkit.org/show_bug.cgi?id=103274 exists.
openerFrame->document()->addConsoleMessage(SecurityMessageSource, ErrorMessageLevel, "Blocked opening '" + request.resourceRequest().url().elidedString() + "' in a new window because the request was made in a sandboxed frame whose 'allow-popups' permission is not set.");
return 0;
}
if (openerFrame->settings() && !openerFrame->settings()->supportsMultipleWindows()) {
created = false;
return openerFrame->tree().top();
}
Page* oldPage = openerFrame->page();
if (!oldPage)
return 0;
Page* page = oldPage->chrome().client().createWindow(openerFrame, request, features, policy, shouldSendReferrer);
if (!page)
return 0;
FrameHost* host = &page->frameHost();
Frame* frame = page->mainFrame();
frame->loader().forceSandboxFlags(openerFrame->document()->sandboxFlags());
if (request.frameName() != "_blank")
frame->tree().setName(request.frameName());
host->chrome().setWindowFeatures(features);
// 'x' and 'y' specify the location of the window, while 'width' and 'height'
// specify the size of the viewport. We can only resize the window, so adjust
// for the difference between the window size and the viewport size.
FloatRect windowRect = host->chrome().windowRect();
FloatSize viewportSize = host->chrome().pageRect().size();
if (features.xSet)
windowRect.setX(features.x);
if (features.ySet)
windowRect.setY(features.y);
if (features.widthSet)
windowRect.setWidth(features.width + (windowRect.width() - viewportSize.width()));
if (features.heightSet)
windowRect.setHeight(features.height + (windowRect.height() - viewportSize.height()));
// Ensure non-NaN values, minimum size as well as being within valid screen area.
FloatRect newWindowRect = DOMWindow::adjustWindowRect(frame, windowRect);
host->chrome().setWindowRect(newWindowRect);
host->chrome().show(policy);
created = true;
return frame;
}
FloatSize HTMLCanvasElement::convertDeviceToLogical(const FloatSize& deviceSize) const
{
float width = ceilf(deviceSize.width() / m_deviceScaleFactor);
float height = ceilf(deviceSize.height() / m_deviceScaleFactor);
return FloatSize(width, height);
}
FloatSize HTMLCanvasElement::convertLogicalToDevice(const FloatSize& logicalSize) const
{
float width = ceilf(logicalSize.width() * m_deviceScaleFactor);
float height = ceilf(logicalSize.height() * m_deviceScaleFactor);
return FloatSize(width, height);
}
static inline float determinant(const FloatSize& a, const FloatSize& b)
{
return a.width() * b.height() - a.height() * b.width();
}
PageScaleConstraints ViewportDescription::resolve(const FloatSize& initialViewportSize, Length legacyFallbackWidth) const
{
float resultWidth = ValueAuto;
Length copyMaxWidth = maxWidth;
Length copyMinWidth = minWidth;
// In case the width (used for min- and max-width) is undefined.
if (isLegacyViewportType() && maxWidth.isAuto()) {
// The width viewport META property is translated into 'width' descriptors, setting
// the 'min' value to 'extend-to-zoom' and the 'max' value to the intended length.
// In case the UA-defines a min-width, use that as length.
if (zoom == ViewportDescription::ValueAuto) {
copyMinWidth = Length(ExtendToZoom);
copyMaxWidth = legacyFallbackWidth;
} else if (maxHeight.isAuto()) {
copyMinWidth = Length(ExtendToZoom);
copyMaxWidth = Length(ExtendToZoom);
}
}
float resultMaxWidth = resolveViewportLength(copyMaxWidth, initialViewportSize, Horizontal);
float resultMinWidth = resolveViewportLength(copyMinWidth, initialViewportSize, Horizontal);
float resultHeight = ValueAuto;
float resultMaxHeight = resolveViewportLength(maxHeight, initialViewportSize, Vertical);
float resultMinHeight = resolveViewportLength(minHeight, initialViewportSize, Vertical);
float resultZoom = zoom;
float resultMinZoom = minZoom;
float resultMaxZoom = maxZoom;
bool resultUserZoom = userZoom;
// 1. Resolve min-zoom and max-zoom values.
if (resultMinZoom != ViewportDescription::ValueAuto && resultMaxZoom != ViewportDescription::ValueAuto)
resultMaxZoom = std::max(resultMinZoom, resultMaxZoom);
// 2. Constrain zoom value to the [min-zoom, max-zoom] range.
if (resultZoom != ViewportDescription::ValueAuto)
resultZoom = compareIgnoringAuto(resultMinZoom, compareIgnoringAuto(resultMaxZoom, resultZoom, std::min), std::max);
float extendZoom = compareIgnoringAuto(resultZoom, resultMaxZoom, std::min);
// 3. Resolve non-"auto" lengths to pixel lengths.
if (extendZoom == ViewportDescription::ValueAuto) {
if (resultMaxWidth == ViewportDescription::ValueExtendToZoom)
resultMaxWidth = ViewportDescription::ValueAuto;
if (resultMaxHeight == ViewportDescription::ValueExtendToZoom)
resultMaxHeight = ViewportDescription::ValueAuto;
if (resultMinWidth == ViewportDescription::ValueExtendToZoom)
resultMinWidth = resultMaxWidth;
if (resultMinHeight == ViewportDescription::ValueExtendToZoom)
resultMinHeight = resultMaxHeight;
} else {
float extendWidth = initialViewportSize.width() / extendZoom;
float extendHeight = initialViewportSize.height() / extendZoom;
if (resultMaxWidth == ViewportDescription::ValueExtendToZoom)
resultMaxWidth = extendWidth;
if (resultMaxHeight == ViewportDescription::ValueExtendToZoom)
resultMaxHeight = extendHeight;
if (resultMinWidth == ViewportDescription::ValueExtendToZoom)
resultMinWidth = compareIgnoringAuto(extendWidth, resultMaxWidth, std::max);
if (resultMinHeight == ViewportDescription::ValueExtendToZoom)
resultMinHeight = compareIgnoringAuto(extendHeight, resultMaxHeight, std::max);
}
// 4. Resolve initial width from min/max descriptors.
if (resultMinWidth != ViewportDescription::ValueAuto || resultMaxWidth != ViewportDescription::ValueAuto)
resultWidth = compareIgnoringAuto(resultMinWidth, compareIgnoringAuto(resultMaxWidth, initialViewportSize.width(), std::min), std::max);
// 5. Resolve initial height from min/max descriptors.
if (resultMinHeight != ViewportDescription::ValueAuto || resultMaxHeight != ViewportDescription::ValueAuto)
resultHeight = compareIgnoringAuto(resultMinHeight, compareIgnoringAuto(resultMaxHeight, initialViewportSize.height(), std::min), std::max);
// 6-7. Resolve width value.
if (resultWidth == ViewportDescription::ValueAuto) {
if (resultHeight == ViewportDescription::ValueAuto || !initialViewportSize.height())
resultWidth = initialViewportSize.width();
else
resultWidth = resultHeight * (initialViewportSize.width() / initialViewportSize.height());
}
// 8. Resolve height value.
if (resultHeight == ViewportDescription::ValueAuto) {
if (!initialViewportSize.width())
resultHeight = initialViewportSize.height();
else
resultHeight = resultWidth * initialViewportSize.height() / initialViewportSize.width();
}
// Resolve initial-scale value.
if (resultZoom == ViewportDescription::ValueAuto) {
if (resultWidth != ViewportDescription::ValueAuto && resultWidth > 0)
resultZoom = initialViewportSize.width() / resultWidth;
if (resultHeight != ViewportDescription::ValueAuto && resultHeight > 0) {
// if 'auto', the initial-scale will be negative here and thus ignored.
resultZoom = std::max<float>(resultZoom, initialViewportSize.height() / resultHeight);
}
}
// If user-scalable = no, lock the min/max scale to the computed initial
// scale.
if (!resultUserZoom)
resultMinZoom = resultMaxZoom = resultZoom;
// Only set initialScale to a value if it was explicitly set.
if (zoom == ViewportDescription::ValueAuto)
resultZoom = ViewportDescription::ValueAuto;
PageScaleConstraints result;
result.minimumScale = resultMinZoom;
result.maximumScale = resultMaxZoom;
result.initialScale = resultZoom;
result.layoutSize.setWidth(resultWidth);
result.layoutSize.setHeight(resultHeight);
return result;
}
ViewportAttributes ViewportArguments::resolve(const FloatSize& initialViewportSize, const FloatSize& deviceSize, int defaultWidth) const
{
float resultWidth = width;
float resultMaxWidth = maxWidth;
float resultMinWidth = minWidth;
float resultHeight = height;
float resultMinHeight = minHeight;
float resultMaxHeight = maxHeight;
float resultZoom = zoom;
float resultMinZoom = minZoom;
float resultMaxZoom = maxZoom;
float resultUserZoom = userZoom;
switch (int(resultWidth)) {
case ViewportArguments::ValueDeviceWidth:
resultWidth = deviceSize.width();
break;
case ViewportArguments::ValueDeviceHeight:
resultWidth = deviceSize.height();
break;
}
switch (int(resultHeight)) {
case ViewportArguments::ValueDeviceWidth:
resultHeight = deviceSize.width();
break;
case ViewportArguments::ValueDeviceHeight:
resultHeight = deviceSize.height();
break;
}
if (type == ViewportArguments::CSSDeviceAdaptation) {
switch (int(resultMinWidth)) {
case ViewportArguments::ValueDeviceWidth:
resultMinWidth = deviceSize.width();
break;
case ViewportArguments::ValueDeviceHeight:
resultMinWidth = deviceSize.height();
break;
}
switch (int(resultMaxWidth)) {
case ViewportArguments::ValueDeviceWidth:
resultMaxWidth = deviceSize.width();
break;
case ViewportArguments::ValueDeviceHeight:
resultMaxWidth = deviceSize.height();
break;
}
switch (int(resultMinHeight)) {
case ViewportArguments::ValueDeviceWidth:
resultMinHeight = deviceSize.width();
break;
case ViewportArguments::ValueDeviceHeight:
resultMinHeight = deviceSize.height();
break;
}
switch (int(resultMaxHeight)) {
case ViewportArguments::ValueDeviceWidth:
resultMaxHeight = deviceSize.width();
break;
case ViewportArguments::ValueDeviceHeight:
resultMaxHeight = deviceSize.height();
break;
}
if (resultMinWidth != ViewportArguments::ValueAuto || resultMaxWidth != ViewportArguments::ValueAuto)
resultWidth = compareIgnoringAuto(resultMinWidth, compareIgnoringAuto(resultMaxWidth, deviceSize.width(), std::min), std::max);
if (resultMinHeight != ViewportArguments::ValueAuto || resultMaxHeight != ViewportArguments::ValueAuto)
resultHeight = compareIgnoringAuto(resultMinHeight, compareIgnoringAuto(resultMaxHeight, deviceSize.height(), std::min), std::max);
if (resultMinZoom != ViewportArguments::ValueAuto && resultMaxZoom != ViewportArguments::ValueAuto)
resultMaxZoom = std::max(resultMinZoom, resultMaxZoom);
if (resultZoom != ViewportArguments::ValueAuto)
resultZoom = compareIgnoringAuto(resultMinZoom, compareIgnoringAuto(resultMaxZoom, resultZoom, std::min), std::max);
if (resultWidth == ViewportArguments::ValueAuto && resultZoom == ViewportArguments::ValueAuto)
resultWidth = deviceSize.width();
if (resultWidth == ViewportArguments::ValueAuto && resultHeight == ViewportArguments::ValueAuto)
resultWidth = deviceSize.width() / resultZoom;
if (resultWidth == ViewportArguments::ValueAuto)
resultWidth = resultHeight * deviceSize.width() / deviceSize.height();
if (resultHeight == ViewportArguments::ValueAuto)
resultHeight = resultWidth * deviceSize.height() / deviceSize.width();
if (resultZoom != ViewportArguments::ValueAuto || resultMaxZoom != ViewportArguments::ValueAuto) {
resultWidth = compareIgnoringAuto(resultWidth, deviceSize.width() / compareIgnoringAuto(resultZoom, resultMaxZoom, std::min), std::max);
resultHeight = compareIgnoringAuto(resultHeight, deviceSize.height() / compareIgnoringAuto(resultZoom, resultMaxZoom, std::min), std::max);
}
resultWidth = std::max<float>(1, resultWidth);
resultHeight = std::max<float>(1, resultHeight);
}
if (type != ViewportArguments::CSSDeviceAdaptation && type != ViewportArguments::Implicit) {
// Clamp values to a valid range, but not for @viewport since is
// not mandated by the specification.
resultWidth = clampLengthValue(resultWidth);
resultHeight = clampLengthValue(resultHeight);
resultZoom = clampScaleValue(resultZoom);
resultMinZoom = clampScaleValue(resultMinZoom);
resultMaxZoom = clampScaleValue(resultMaxZoom);
}
ViewportAttributes result;
// Resolve minimum-scale and maximum-scale values according to spec.
if (resultMinZoom == ViewportArguments::ValueAuto)
result.minimumScale = float(0.25);
else
result.minimumScale = resultMinZoom;
if (resultMaxZoom == ViewportArguments::ValueAuto) {
result.maximumScale = 5;
result.minimumScale = std::min<float>(5, result.minimumScale);
} else
result.maximumScale = resultMaxZoom;
result.maximumScale = std::max(result.minimumScale, result.maximumScale);
// Resolve initial-scale value.
result.initialScale = resultZoom;
if (resultZoom == ViewportArguments::ValueAuto) {
result.initialScale = initialViewportSize.width() / defaultWidth;
if (resultWidth != ViewportArguments::ValueAuto)
result.initialScale = initialViewportSize.width() / resultWidth;
if (resultHeight != ViewportArguments::ValueAuto) {
// if 'auto', the initial-scale will be negative here and thus ignored.
result.initialScale = std::max<float>(result.initialScale, initialViewportSize.height() / resultHeight);
}
}
// Constrain initial-scale value to minimum-scale/maximum-scale range.
result.initialScale = std::min(result.maximumScale, std::max(result.minimumScale, result.initialScale));
// Resolve width value.
if (resultWidth == ViewportArguments::ValueAuto) {
if (resultZoom == ViewportArguments::ValueAuto)
resultWidth = defaultWidth;
else if (resultHeight != ViewportArguments::ValueAuto)
resultWidth = resultHeight * (initialViewportSize.width() / initialViewportSize.height());
else
resultWidth = initialViewportSize.width() / result.initialScale;
}
// Resolve height value.
if (resultHeight == ViewportArguments::ValueAuto)
resultHeight = resultWidth * (initialViewportSize.height() / initialViewportSize.width());
if (type == ViewportArguments::ViewportMeta) {
// Extend width and height to fill the visual viewport for the resolved initial-scale.
resultWidth = std::max<float>(resultWidth, initialViewportSize.width() / result.initialScale);
resultHeight = std::max<float>(resultHeight, initialViewportSize.height() / result.initialScale);
}
result.layoutSize.setWidth(resultWidth);
result.layoutSize.setHeight(resultHeight);
// FIXME: This might affect some ports, but is the right thing to do.
// Only set initialScale to a value if it was explicitly set.
// if (resultZoom == ViewportArguments::ValueAuto)
// result.initialScale = ViewportArguments::ValueAuto;
result.userScalable = resultUserZoom;
result.orientation = orientation;
return result;
}
static PassOwnPtr<Shape> createRectangleShape(const FloatRect& bounds, const FloatSize& radii)
{
ASSERT(bounds.width() >= 0 && bounds.height() >= 0 && radii.width() >= 0 && radii.height() >= 0);
return adoptPtr(new RectangleShape(bounds, radii));
}
static std::unique_ptr<Shape> createEllipseShape(const FloatPoint& center, const FloatSize& radii)
{
ASSERT(radii.width() >= 0 && radii.height() >= 0);
return std::make_unique<RectangleShape>(FloatRect(center.x() - radii.width(), center.y() - radii.height(), radii.width()*2, radii.height()*2), radii);
}
static inline FloatSize physicalSizeToLogical(const FloatSize& size, WritingMode writingMode)
{
if (isHorizontalWritingMode(writingMode))
return size;
return size.transposedSize();
}
void LayoutReplaced::computeAspectRatioInformationForLayoutBox(LayoutBox* contentLayoutObject, FloatSize& constrainedSize, double& intrinsicRatio) const
{
FloatSize intrinsicSize;
if (contentLayoutObject) {
contentLayoutObject->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio);
// Handle zoom & vertical writing modes here, as the embedded document doesn't know about them.
intrinsicSize.scale(style()->effectiveZoom());
if (isLayoutImage())
intrinsicSize.scale(toLayoutImage(this)->imageDevicePixelRatio());
// Update our intrinsic size to match what the content layoutObject has computed, so that when we
// constrain the size below, the correct intrinsic size will be obtained for comparison against
// min and max widths.
if (intrinsicRatio && !intrinsicSize.isEmpty())
m_intrinsicSize = LayoutSize(intrinsicSize);
if (!isHorizontalWritingMode()) {
if (intrinsicRatio)
intrinsicRatio = 1 / intrinsicRatio;
intrinsicSize = intrinsicSize.transposedSize();
}
} else {
computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio);
if (intrinsicRatio && !intrinsicSize.isEmpty())
m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize());
}
// Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the
// opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here
// having to shrink in order to preserve the aspect ratio. Because we compute these values independently along
// each axis, the final returned size may in fact not preserve the aspect ratio.
// FIXME: In the long term, it might be better to just return this code more to the way it used to be before this
// function was added, since all it has done is make the code more unclear.
constrainedSize = intrinsicSize;
if (intrinsicRatio && !intrinsicSize.isEmpty() && style()->logicalWidth().isAuto() && style()->logicalHeight().isAuto()) {
// We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which
// can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom!
constrainedSize.setWidth(LayoutBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height());
constrainedSize.setHeight(LayoutBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width());
}
}
static inline int resolveWidthForRatio(int height, const FloatSize& intrinsicRatio)
{
return ceilf(height * intrinsicRatio.width() / intrinsicRatio.height());
}
LayoutUnit LayoutReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
{
if (style()->logicalWidth().isSpecified() || style()->logicalWidth().isIntrinsic())
return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(MainOrPreferredSize, style()->logicalWidth()), shouldComputePreferred);
LayoutBox* contentLayoutObject = embeddedContentBox();
// 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
double intrinsicRatio = 0;
FloatSize constrainedSize;
computeAspectRatioInformationForLayoutBox(contentLayoutObject, constrainedSize, intrinsicRatio);
if (style()->logicalWidth().isAuto()) {
bool computedHeightIsAuto = hasAutoHeightOrContainingBlockWithAutoHeight();
bool hasIntrinsicWidth = constrainedSize.width() > 0;
// If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (computedHeightIsAuto && hasIntrinsicWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);
bool hasIntrinsicHeight = constrainedSize.height() > 0;
if (intrinsicRatio) {
// If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio;
// or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value
// of 'width' is: (used height) * (intrinsic ratio)
if (intrinsicRatio && ((computedHeightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !computedHeightIsAuto)) {
LayoutUnit logicalHeight = computeReplacedLogicalHeight();
return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalHeight * intrinsicRatio, shouldComputePreferred);
}
// If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of
// 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then
// the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow.
if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) {
if (shouldComputePreferred == ComputePreferred)
return 0;
// The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow:
// 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
LayoutUnit logicalWidth = containingBlock()->availableLogicalWidth();
// This solves above equation for 'width' (== logicalWidth).
LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth);
LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth);
logicalWidth = std::max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (size().width() - clientWidth())));
return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred);
}
}
// Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (hasIntrinsicWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);
// Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too
// wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead.
// Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired.
// Changing this to return cDefaultWidth, will affect lots of test results. Eg. some tests assume that a blank <img> tag (which implies width/height=auto)
// has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time.
}
return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred);
}
void Path::translate(const FloatSize& size)
{
m_path->offset(SkFloatToScalar(size.width()), SkFloatToScalar(size.height()));
}
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);
drawPatternCounter.startCounting();
drawPattern(ctxt, tileRect, patternTransform, oneTileRect.location(), op, destRect);
drawPatternCounter.stopCounting();
startAnimation();
}
void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, SkXfermode::Mode op, const IntSize& repeatSpacing)
{
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());
FloatSize actualTileSize(scaledTileSize.width() + repeatSpacing.width(), scaledTileSize.height() + repeatSpacing.height());
FloatRect oneTileRect;
oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), actualTileSize.width()) - actualTileSize.width(), actualTileSize.width()));
oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), actualTileSize.height()) - actualTileSize.height(), actualTileSize.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());
ctxt->drawImage(this, destRect, visibleSrcRect, op, DoNotRespectImageOrientation);
return;
}
FloatRect tileRect(FloatPoint(), intrinsicTileSize);
drawPattern(ctxt, tileRect, scale, oneTileRect.location(), op, destRect, repeatSpacing);
startAnimation();
}
FloatSize LocalFrame::resizePageRectsKeepingRatio(
const FloatSize& originalSize,
const FloatSize& expectedSize) {
FloatSize resultSize;
if (contentLayoutItem().isNull())
return FloatSize();
if (contentLayoutItem().style()->isHorizontalWritingMode()) {
ASSERT(fabs(originalSize.width()) > std::numeric_limits<float>::epsilon());
float ratio = originalSize.height() / originalSize.width();
resultSize.setWidth(floorf(expectedSize.width()));
resultSize.setHeight(floorf(resultSize.width() * ratio));
} else {
ASSERT(fabs(originalSize.height()) > std::numeric_limits<float>::epsilon());
float ratio = originalSize.width() / originalSize.height();
resultSize.setHeight(floorf(expectedSize.height()));
resultSize.setWidth(floorf(resultSize.height() * ratio));
}
return resultSize;
}
static inline float viewportMaxPercent(const FloatSize& viewportSize)
{
return std::max(viewportSize.width(), viewportSize.height()) / 100;
}
static ResamplingMode computeResamplingMode(PlatformContextSkia* platformContext, const NativeImageSkia& bitmap, int srcWidth, int srcHeight, float destWidth, float destHeight)
{
if (platformContext->hasImageResamplingHint()) {
IntSize srcSize;
FloatSize dstSize;
platformContext->getImageResamplingHint(&srcSize, &dstSize);
srcWidth = srcSize.width();
srcHeight = srcSize.height();
destWidth = dstSize.width();
destHeight = dstSize.height();
}
int destIWidth = static_cast<int>(destWidth);
int destIHeight = static_cast<int>(destHeight);
// The percent change below which we will not resample. This usually means
// an off-by-one error on the web page, and just doing nearest neighbor
// sampling is usually good enough.
const float kFractionalChangeThreshold = 0.025f;
// Images smaller than this in either direction are considered "small" and
// are not resampled ever (see below).
const int kSmallImageSizeThreshold = 8;
// The amount an image can be stretched in a single direction before we
// say that it is being stretched so much that it must be a line or
// background that doesn't need resampling.
const float kLargeStretch = 3.0f;
// Figure out if we should resample this image. We try to prune out some
// common cases where resampling won't give us anything, since it is much
// slower than drawing stretched.
if (srcWidth == destIWidth && srcHeight == destIHeight) {
// We don't need to resample if the source and destination are the same.
return RESAMPLE_NONE;
}
if (srcWidth <= kSmallImageSizeThreshold
|| srcHeight <= kSmallImageSizeThreshold
|| destWidth <= kSmallImageSizeThreshold
|| destHeight <= kSmallImageSizeThreshold) {
// Never resample small images. These are often used for borders and
// rules (think 1x1 images used to make lines).
return RESAMPLE_NONE;
}
if (srcHeight * kLargeStretch <= destHeight || srcWidth * kLargeStretch <= destWidth) {
// Large image detected.
// Don't resample if it is being stretched a lot in only one direction.
// This is trying to catch cases where somebody has created a border
// (which might be large) and then is stretching it to fill some part
// of the page.
if (srcWidth == destWidth || srcHeight == destHeight)
return RESAMPLE_NONE;
// The image is growing a lot and in more than one direction. Resampling
// is slow and doesn't give us very much when growing a lot.
return RESAMPLE_LINEAR;
}
if ((fabs(destWidth - srcWidth) / srcWidth < kFractionalChangeThreshold)
&& (fabs(destHeight - srcHeight) / srcHeight < kFractionalChangeThreshold)) {
// It is disappointingly common on the web for image sizes to be off by
// one or two pixels. We don't bother resampling if the size difference
// is a small fraction of the original size.
return RESAMPLE_NONE;
}
// When the image is not yet done loading, use linear. We don't cache the
// partially resampled images, and as they come in incrementally, it causes
// us to have to resample the whole thing every time.
if (!bitmap.isDataComplete())
return RESAMPLE_LINEAR;
// Everything else gets resampled.
// If the platform context permits high quality interpolation, use it.
// High quality interpolation only enabled for scaling and translation.
if (platformContext->interpolationQuality() == InterpolationHigh
&& !(platformContext->canvas()->getTotalMatrix().getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
return RESAMPLE_AWESOME;
return RESAMPLE_LINEAR;
}
void restrictMinimumScaleFactorToViewportSize(ViewportAttributes& result, IntSize visibleViewport, float devicePixelRatio)
{
FloatSize viewportSize = convertToUserSpace(visibleViewport, devicePixelRatio);
result.minimumScale = max<float>(result.minimumScale, max(viewportSize.width() / result.layoutSize.width(), viewportSize.height() / result.layoutSize.height()));
}
void SVGPreserveAspectRatio::transformRect(FloatRect& destRect, FloatRect& srcRect)
{
if (m_align == SVG_PRESERVEASPECTRATIO_NONE)
return;
FloatSize imageSize = srcRect.size();
float origDestWidth = destRect.width();
float origDestHeight = destRect.height();
switch (m_meetOrSlice) {
case SVGPreserveAspectRatio::SVG_MEETORSLICE_UNKNOWN:
break;
case SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET: {
float widthToHeightMultiplier = srcRect.height() / srcRect.width();
if (origDestHeight > origDestWidth * widthToHeightMultiplier) {
destRect.setHeight(origDestWidth * widthToHeightMultiplier);
switch (m_align) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
destRect.setY(destRect.y() + origDestHeight / 2 - destRect.height() / 2);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
destRect.setY(destRect.y() + origDestHeight - destRect.height());
break;
default:
break;
}
}
if (origDestWidth > origDestHeight / widthToHeightMultiplier) {
destRect.setWidth(origDestHeight / widthToHeightMultiplier);
switch (m_align) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
destRect.setX(destRect.x() + origDestWidth / 2 - destRect.width() / 2);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
destRect.setX(destRect.x() + origDestWidth - destRect.width());
break;
default:
break;
}
}
break;
}
case SVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE: {
float widthToHeightMultiplier = srcRect.height() / srcRect.width();
// if the destination height is less than the height of the image we'll be drawing
if (origDestHeight < origDestWidth * widthToHeightMultiplier) {
float destToSrcMultiplier = srcRect.width() / destRect.width();
srcRect.setHeight(destRect.height() * destToSrcMultiplier);
switch (m_align) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
srcRect.setY(srcRect.y() + imageSize.height() / 2 - srcRect.height() / 2);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
srcRect.setY(srcRect.y() + imageSize.height() - srcRect.height());
break;
default:
break;
}
}
// if the destination width is less than the width of the image we'll be drawing
if (origDestWidth < origDestHeight / widthToHeightMultiplier) {
float destToSrcMultiplier = srcRect.height() / destRect.height();
srcRect.setWidth(destRect.width() * destToSrcMultiplier);
switch (m_align) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
srcRect.setX(srcRect.x() + imageSize.width() / 2 - srcRect.width() / 2);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
srcRect.setX(srcRect.x() + imageSize.width() - srcRect.width());
break;
default:
break;
}
}
break;
}
}
}
