summaryrefslogtreecommitdiffstats
path: root/layout/svg/nsSVGPatternFrame.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'layout/svg/nsSVGPatternFrame.cpp')
-rw-r--r--layout/svg/nsSVGPatternFrame.cpp748
1 files changed, 748 insertions, 0 deletions
diff --git a/layout/svg/nsSVGPatternFrame.cpp b/layout/svg/nsSVGPatternFrame.cpp
new file mode 100644
index 000000000..198163d7f
--- /dev/null
+++ b/layout/svg/nsSVGPatternFrame.cpp
@@ -0,0 +1,748 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Main header first:
+#include "nsSVGPatternFrame.h"
+
+// Keep others in (case-insensitive) order:
+#include "gfx2DGlue.h"
+#include "gfxContext.h"
+#include "gfxMatrix.h"
+#include "gfxPattern.h"
+#include "gfxPlatform.h"
+#include "mozilla/gfx/2D.h"
+#include "nsContentUtils.h"
+#include "nsGkAtoms.h"
+#include "nsISVGChildFrame.h"
+#include "nsStyleContext.h"
+#include "nsSVGEffects.h"
+#include "nsSVGPathGeometryFrame.h"
+#include "mozilla/dom/SVGPatternElement.h"
+#include "nsSVGUtils.h"
+#include "nsSVGAnimatedTransformList.h"
+#include "SVGContentUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+
+//----------------------------------------------------------------------
+// Helper classes
+
+class MOZ_RAII nsSVGPatternFrame::AutoPatternReferencer
+{
+public:
+ explicit AutoPatternReferencer(nsSVGPatternFrame *aFrame
+ MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
+ : mFrame(aFrame)
+ {
+ MOZ_GUARD_OBJECT_NOTIFIER_INIT;
+ // Reference loops should normally be detected in advance and handled, so
+ // we're not expecting to encounter them here
+ MOZ_ASSERT(!mFrame->mLoopFlag, "Undetected reference loop!");
+ mFrame->mLoopFlag = true;
+ }
+ ~AutoPatternReferencer() {
+ mFrame->mLoopFlag = false;
+ }
+private:
+ nsSVGPatternFrame *mFrame;
+ MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
+};
+
+//----------------------------------------------------------------------
+// Implementation
+
+nsSVGPatternFrame::nsSVGPatternFrame(nsStyleContext* aContext)
+ : nsSVGPaintServerFrame(aContext)
+ , mLoopFlag(false)
+ , mNoHRefURI(false)
+{
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGPatternFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods:
+
+nsresult
+nsSVGPatternFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ if (aNameSpaceID == kNameSpaceID_None &&
+ (aAttribute == nsGkAtoms::patternUnits ||
+ aAttribute == nsGkAtoms::patternContentUnits ||
+ aAttribute == nsGkAtoms::patternTransform ||
+ aAttribute == nsGkAtoms::x ||
+ aAttribute == nsGkAtoms::y ||
+ aAttribute == nsGkAtoms::width ||
+ aAttribute == nsGkAtoms::height ||
+ aAttribute == nsGkAtoms::preserveAspectRatio ||
+ aAttribute == nsGkAtoms::viewBox)) {
+ nsSVGEffects::InvalidateDirectRenderingObservers(this);
+ }
+
+ if ((aNameSpaceID == kNameSpaceID_XLink ||
+ aNameSpaceID == kNameSpaceID_None) &&
+ aAttribute == nsGkAtoms::href) {
+ // Blow away our reference, if any
+ Properties().Delete(nsSVGEffects::HrefAsPaintingProperty());
+ mNoHRefURI = false;
+ // And update whoever references us
+ nsSVGEffects::InvalidateDirectRenderingObservers(this);
+ }
+
+ return nsSVGPaintServerFrame::AttributeChanged(aNameSpaceID,
+ aAttribute, aModType);
+}
+
+#ifdef DEBUG
+void
+nsSVGPatternFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow)
+{
+ NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::pattern), "Content is not an SVG pattern");
+
+ nsSVGPaintServerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsIAtom*
+nsSVGPatternFrame::GetType() const
+{
+ return nsGkAtoms::svgPatternFrame;
+}
+
+//----------------------------------------------------------------------
+// nsSVGContainerFrame methods:
+
+// If our GetCanvasTM is getting called, we
+// need to return *our current* transformation
+// matrix, which depends on our units parameters
+// and X, Y, Width, and Height
+gfxMatrix
+nsSVGPatternFrame::GetCanvasTM()
+{
+ if (mCTM) {
+ return *mCTM;
+ }
+
+ // Do we know our rendering parent?
+ if (mSource) {
+ // Yes, use it!
+ return mSource->GetCanvasTM();
+ }
+
+ // We get here when geometry in the <pattern> container is updated
+ return gfxMatrix();
+}
+
+// -------------------------------------------------------------------------
+// Helper functions
+// -------------------------------------------------------------------------
+
+/** Calculate the maximum expansion of a matrix */
+static float
+MaxExpansion(const Matrix &aMatrix)
+{
+ // maximum expansion derivation from
+ // http://lists.cairographics.org/archives/cairo/2004-October/001980.html
+ // and also implemented in cairo_matrix_transformed_circle_major_axis
+ double a = aMatrix._11;
+ double b = aMatrix._12;
+ double c = aMatrix._21;
+ double d = aMatrix._22;
+ double f = (a * a + b * b + c * c + d * d) / 2;
+ double g = (a * a + b * b - c * c - d * d) / 2;
+ double h = a * c + b * d;
+ return sqrt(f + sqrt(g * g + h * h));
+}
+
+// The SVG specification says that the 'patternContentUnits' attribute "has no effect if
+// attribute ‘viewBox’ is specified". We still need to include a bbox scale
+// if the viewBox is specified and _patternUnits_ is set to or defaults to
+// objectBoundingBox though, since in that case the viewBox is relative to the bbox
+static bool
+IncludeBBoxScale(const nsSVGViewBox& aViewBox,
+ uint32_t aPatternContentUnits, uint32_t aPatternUnits)
+{
+ return (!aViewBox.IsExplicitlySet() &&
+ aPatternContentUnits == SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) ||
+ (aViewBox.IsExplicitlySet() &&
+ aPatternUnits == SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+}
+
+// Given the matrix for the pattern element's own transform, this returns a
+// combined matrix including the transforms applicable to its target.
+static Matrix
+GetPatternMatrix(uint16_t aPatternUnits,
+ const Matrix &patternTransform,
+ const gfxRect &bbox,
+ const gfxRect &callerBBox,
+ const Matrix &callerCTM)
+{
+ // We really want the pattern matrix to handle translations
+ gfxFloat minx = bbox.X();
+ gfxFloat miny = bbox.Y();
+
+ if (aPatternUnits == SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
+ minx += callerBBox.X();
+ miny += callerBBox.Y();
+ }
+
+ float scale = 1.0f / MaxExpansion(callerCTM);
+ Matrix patternMatrix = patternTransform;
+ patternMatrix.PreScale(scale, scale);
+ patternMatrix.PreTranslate(minx, miny);
+
+ return patternMatrix;
+}
+
+static nsresult
+GetTargetGeometry(gfxRect *aBBox,
+ const nsSVGViewBox &aViewBox,
+ uint16_t aPatternContentUnits,
+ uint16_t aPatternUnits,
+ nsIFrame *aTarget,
+ const Matrix &aContextMatrix,
+ const gfxRect *aOverrideBounds)
+{
+ *aBBox = aOverrideBounds ? *aOverrideBounds : nsSVGUtils::GetBBox(aTarget);
+
+ // Sanity check
+ if (IncludeBBoxScale(aViewBox, aPatternContentUnits, aPatternUnits) &&
+ (aBBox->Width() <= 0 || aBBox->Height() <= 0)) {
+ return NS_ERROR_FAILURE;
+ }
+
+ // OK, now fix up the bounding box to reflect user coordinates
+ // We handle device unit scaling in pattern matrix
+ float scale = MaxExpansion(aContextMatrix);
+ if (scale <= 0) {
+ return NS_ERROR_FAILURE;
+ }
+ aBBox->Scale(scale);
+ return NS_OK;
+}
+
+already_AddRefed<SourceSurface>
+nsSVGPatternFrame::PaintPattern(const DrawTarget* aDrawTarget,
+ Matrix* patternMatrix,
+ const Matrix &aContextMatrix,
+ nsIFrame *aSource,
+ nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
+ float aGraphicOpacity,
+ const gfxRect *aOverrideBounds)
+{
+ /*
+ * General approach:
+ * Set the content geometry stuff
+ * Calculate our bbox (using x,y,width,height & patternUnits &
+ * patternTransform)
+ * Create the surface
+ * Calculate the content transformation matrix
+ * Get our children (we may need to get them from another Pattern)
+ * Call SVGPaint on all of our children
+ * Return
+ */
+
+ nsSVGPatternFrame* patternWithChildren = GetPatternWithChildren();
+ if (!patternWithChildren) {
+ return nullptr; // Either no kids or a bad reference
+ }
+ nsIFrame* firstKid = patternWithChildren->mFrames.FirstChild();
+
+ const nsSVGViewBox& viewBox = GetViewBox();
+
+ uint16_t patternContentUnits =
+ GetEnumValue(SVGPatternElement::PATTERNCONTENTUNITS);
+ uint16_t patternUnits =
+ GetEnumValue(SVGPatternElement::PATTERNUNITS);
+
+ /*
+ * Get the content geometry information. This is a little tricky --
+ * our parent is probably a <defs>, but we are rendering in the context
+ * of some geometry source. Our content geometry information needs to
+ * come from our rendering parent as opposed to our content parent. We
+ * get that information from aSource, which is passed to us from the
+ * backend renderer.
+ *
+ * There are three "geometries" that we need:
+ * 1) The bounding box for the pattern. We use this to get the
+ * width and height for the surface, and as the return to
+ * GetBBox.
+ * 2) The transformation matrix for the pattern. This is not *quite*
+ * the same as the canvas transformation matrix that we will
+ * provide to our rendering children since we "fudge" it a little
+ * to get the renderer to handle the translations correctly for us.
+ * 3) The CTM that we return to our children who make up the pattern.
+ */
+
+ // Get all of the information we need from our "caller" -- i.e.
+ // the geometry that is being rendered with a pattern
+ gfxRect callerBBox;
+ if (NS_FAILED(GetTargetGeometry(&callerBBox,
+ viewBox,
+ patternContentUnits, patternUnits,
+ aSource,
+ aContextMatrix,
+ aOverrideBounds))) {
+ return nullptr;
+ }
+
+ // Construct the CTM that we will provide to our children when we
+ // render them into the tile.
+ gfxMatrix ctm = ConstructCTM(viewBox, patternContentUnits, patternUnits,
+ callerBBox, aContextMatrix, aSource);
+ if (ctm.IsSingular()) {
+ return nullptr;
+ }
+
+ if (patternWithChildren->mCTM) {
+ *patternWithChildren->mCTM = ctm;
+ } else {
+ patternWithChildren->mCTM = new gfxMatrix(ctm);
+ }
+
+ // Get the bounding box of the pattern. This will be used to determine
+ // the size of the surface, and will also be used to define the bounding
+ // box for the pattern tile.
+ gfxRect bbox = GetPatternRect(patternUnits, callerBBox, aContextMatrix, aSource);
+ if (bbox.Width() <= 0.0 || bbox.Height() <= 0.0) {
+ return nullptr;
+ }
+
+ // Get the pattern transform
+ Matrix patternTransform = ToMatrix(GetPatternTransform());
+
+ // revert the vector effect transform so that the pattern appears unchanged
+ if (aFillOrStroke == &nsStyleSVG::mStroke) {
+ gfxMatrix userToOuterSVG;
+ if (nsSVGUtils::GetNonScalingStrokeTransform(aSource, &userToOuterSVG)) {
+ patternTransform *= ToMatrix(userToOuterSVG);
+ if (patternTransform.IsSingular()) {
+ NS_WARNING("Singular matrix painting non-scaling-stroke");
+ return nullptr;
+ }
+ }
+ }
+
+ // Get the transformation matrix that we will hand to the renderer's pattern
+ // routine.
+ *patternMatrix = GetPatternMatrix(patternUnits, patternTransform,
+ bbox, callerBBox, aContextMatrix);
+ if (patternMatrix->IsSingular()) {
+ return nullptr;
+ }
+
+ // Now that we have all of the necessary geometries, we can
+ // create our surface.
+ gfxRect transformedBBox = ThebesRect(patternTransform.TransformBounds(ToRect(bbox)));
+
+ bool resultOverflows;
+ IntSize surfaceSize =
+ nsSVGUtils::ConvertToSurfaceSize(
+ transformedBBox.Size(), &resultOverflows);
+
+ // 0 disables rendering, < 0 is an error
+ if (surfaceSize.width <= 0 || surfaceSize.height <= 0) {
+ return nullptr;
+ }
+
+ gfxFloat patternWidth = bbox.Width();
+ gfxFloat patternHeight = bbox.Height();
+
+ if (resultOverflows ||
+ patternWidth != surfaceSize.width ||
+ patternHeight != surfaceSize.height) {
+ // scale drawing to pattern surface size
+ gfxMatrix tempTM =
+ gfxMatrix(surfaceSize.width / patternWidth, 0.0,
+ 0.0, surfaceSize.height / patternHeight,
+ 0.0, 0.0);
+ patternWithChildren->mCTM->PreMultiply(tempTM);
+
+ // and rescale pattern to compensate
+ patternMatrix->PreScale(patternWidth / surfaceSize.width,
+ patternHeight / surfaceSize.height);
+ }
+
+ RefPtr<DrawTarget> dt =
+ aDrawTarget->CreateSimilarDrawTarget(surfaceSize, SurfaceFormat::B8G8R8A8);
+ if (!dt || !dt->IsValid()) {
+ return nullptr;
+ }
+ dt->ClearRect(Rect(0, 0, surfaceSize.width, surfaceSize.height));
+
+ RefPtr<gfxContext> gfx = gfxContext::CreateOrNull(dt);
+ MOZ_ASSERT(gfx); // already checked the draw target above
+
+ if (aGraphicOpacity != 1.0f) {
+ gfx->Save();
+ gfx->PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, aGraphicOpacity);
+ }
+
+ // OK, now render -- note that we use "firstKid", which
+ // we got at the beginning because it takes care of the
+ // referenced pattern situation for us
+
+ if (aSource->IsFrameOfType(nsIFrame::eSVGGeometry)) {
+ // Set the geometrical parent of the pattern we are rendering
+ patternWithChildren->mSource = static_cast<nsSVGPathGeometryFrame*>(aSource);
+ }
+
+ // Delay checking NS_FRAME_DRAWING_AS_PAINTSERVER bit until here so we can
+ // give back a clear surface if there's a loop
+ if (!(patternWithChildren->GetStateBits() & NS_FRAME_DRAWING_AS_PAINTSERVER)) {
+ patternWithChildren->AddStateBits(NS_FRAME_DRAWING_AS_PAINTSERVER);
+ for (nsIFrame* kid = firstKid; kid;
+ kid = kid->GetNextSibling()) {
+ // The CTM of each frame referencing us can be different
+ nsISVGChildFrame* SVGFrame = do_QueryFrame(kid);
+ if (SVGFrame) {
+ SVGFrame->NotifySVGChanged(nsISVGChildFrame::TRANSFORM_CHANGED);
+ }
+ gfxMatrix tm = *(patternWithChildren->mCTM);
+ if (kid->GetContent()->IsSVGElement()) {
+ tm = static_cast<nsSVGElement*>(kid->GetContent())->
+ PrependLocalTransformsTo(tm, eUserSpaceToParent);
+ }
+ Unused << nsSVGUtils::PaintFrameWithEffects(kid, *gfx, tm);
+ }
+ patternWithChildren->RemoveStateBits(NS_FRAME_DRAWING_AS_PAINTSERVER);
+ }
+
+ patternWithChildren->mSource = nullptr;
+
+ if (aGraphicOpacity != 1.0f) {
+ gfx->PopGroupAndBlend();
+ gfx->Restore();
+ }
+
+ // caller now owns the surface
+ return dt->Snapshot();
+}
+
+/* Will probably need something like this... */
+// How do we handle the insertion of a new frame?
+// We really don't want to rerender this every time,
+// do we?
+nsSVGPatternFrame*
+nsSVGPatternFrame::GetPatternWithChildren()
+{
+ // Do we have any children ourselves?
+ if (!mFrames.IsEmpty())
+ return this;
+
+ // No, see if we chain to someone who does
+ AutoPatternReferencer patternRef(this);
+
+ nsSVGPatternFrame* next = GetReferencedPatternIfNotInUse();
+ if (!next)
+ return nullptr;
+
+ return next->GetPatternWithChildren();
+}
+
+uint16_t
+nsSVGPatternFrame::GetEnumValue(uint32_t aIndex, nsIContent *aDefault)
+{
+ nsSVGEnum& thisEnum =
+ static_cast<SVGPatternElement *>(mContent)->mEnumAttributes[aIndex];
+
+ if (thisEnum.IsExplicitlySet())
+ return thisEnum.GetAnimValue();
+
+ AutoPatternReferencer patternRef(this);
+
+ nsSVGPatternFrame *next = GetReferencedPatternIfNotInUse();
+ return next ? next->GetEnumValue(aIndex, aDefault) :
+ static_cast<SVGPatternElement *>(aDefault)->
+ mEnumAttributes[aIndex].GetAnimValue();
+}
+
+nsSVGAnimatedTransformList*
+nsSVGPatternFrame::GetPatternTransformList(nsIContent* aDefault)
+{
+ nsSVGAnimatedTransformList *thisTransformList =
+ static_cast<SVGPatternElement *>(mContent)->GetAnimatedTransformList();
+
+ if (thisTransformList && thisTransformList->IsExplicitlySet())
+ return thisTransformList;
+
+ AutoPatternReferencer patternRef(this);
+
+ nsSVGPatternFrame *next = GetReferencedPatternIfNotInUse();
+ return next ? next->GetPatternTransformList(aDefault) :
+ static_cast<SVGPatternElement *>(aDefault)->mPatternTransform.get();
+}
+
+gfxMatrix
+nsSVGPatternFrame::GetPatternTransform()
+{
+ nsSVGAnimatedTransformList* animTransformList =
+ GetPatternTransformList(mContent);
+ if (!animTransformList)
+ return gfxMatrix();
+
+ return animTransformList->GetAnimValue().GetConsolidationMatrix();
+}
+
+const nsSVGViewBox &
+nsSVGPatternFrame::GetViewBox(nsIContent* aDefault)
+{
+ const nsSVGViewBox &thisViewBox =
+ static_cast<SVGPatternElement *>(mContent)->mViewBox;
+
+ if (thisViewBox.IsExplicitlySet())
+ return thisViewBox;
+
+ AutoPatternReferencer patternRef(this);
+
+ nsSVGPatternFrame *next = GetReferencedPatternIfNotInUse();
+ return next ? next->GetViewBox(aDefault) :
+ static_cast<SVGPatternElement *>(aDefault)->mViewBox;
+}
+
+const SVGAnimatedPreserveAspectRatio &
+nsSVGPatternFrame::GetPreserveAspectRatio(nsIContent *aDefault)
+{
+ const SVGAnimatedPreserveAspectRatio &thisPar =
+ static_cast<SVGPatternElement *>(mContent)->mPreserveAspectRatio;
+
+ if (thisPar.IsExplicitlySet())
+ return thisPar;
+
+ AutoPatternReferencer patternRef(this);
+
+ nsSVGPatternFrame *next = GetReferencedPatternIfNotInUse();
+ return next ? next->GetPreserveAspectRatio(aDefault) :
+ static_cast<SVGPatternElement *>(aDefault)->mPreserveAspectRatio;
+}
+
+const nsSVGLength2 *
+nsSVGPatternFrame::GetLengthValue(uint32_t aIndex, nsIContent *aDefault)
+{
+ const nsSVGLength2 *thisLength =
+ &static_cast<SVGPatternElement *>(mContent)->mLengthAttributes[aIndex];
+
+ if (thisLength->IsExplicitlySet())
+ return thisLength;
+
+ AutoPatternReferencer patternRef(this);
+
+ nsSVGPatternFrame *next = GetReferencedPatternIfNotInUse();
+ return next ? next->GetLengthValue(aIndex, aDefault) :
+ &static_cast<SVGPatternElement *>(aDefault)->mLengthAttributes[aIndex];
+}
+
+// Private (helper) methods
+nsSVGPatternFrame *
+nsSVGPatternFrame::GetReferencedPattern()
+{
+ if (mNoHRefURI)
+ return nullptr;
+
+ nsSVGPaintingProperty *property =
+ Properties().Get(nsSVGEffects::HrefAsPaintingProperty());
+
+ if (!property) {
+ // Fetch our pattern element's href or xlink:href attribute
+ SVGPatternElement *pattern = static_cast<SVGPatternElement *>(mContent);
+ nsAutoString href;
+ if (pattern->mStringAttributes[SVGPatternElement::HREF].IsExplicitlySet()) {
+ pattern->mStringAttributes[SVGPatternElement::HREF]
+ .GetAnimValue(href, pattern);
+ } else {
+ pattern->mStringAttributes[SVGPatternElement::XLINK_HREF]
+ .GetAnimValue(href, pattern);
+ }
+
+ if (href.IsEmpty()) {
+ mNoHRefURI = true;
+ return nullptr; // no URL
+ }
+
+ // Convert href to an nsIURI
+ nsCOMPtr<nsIURI> targetURI;
+ nsCOMPtr<nsIURI> base = mContent->GetBaseURI();
+ nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), href,
+ mContent->GetUncomposedDoc(), base);
+
+ property =
+ nsSVGEffects::GetPaintingProperty(targetURI, this,
+ nsSVGEffects::HrefAsPaintingProperty());
+ if (!property)
+ return nullptr;
+ }
+
+ nsIFrame *result = property->GetReferencedFrame();
+ if (!result)
+ return nullptr;
+
+ nsIAtom* frameType = result->GetType();
+ if (frameType != nsGkAtoms::svgPatternFrame)
+ return nullptr;
+
+ return static_cast<nsSVGPatternFrame*>(result);
+}
+
+nsSVGPatternFrame *
+nsSVGPatternFrame::GetReferencedPatternIfNotInUse()
+{
+ nsSVGPatternFrame *referenced = GetReferencedPattern();
+ if (!referenced)
+ return nullptr;
+
+ if (referenced->mLoopFlag) {
+ // XXXjwatt: we should really send an error to the JavaScript Console here:
+ NS_WARNING("pattern reference loop detected while inheriting attribute!");
+ return nullptr;
+ }
+
+ return referenced;
+}
+
+gfxRect
+nsSVGPatternFrame::GetPatternRect(uint16_t aPatternUnits,
+ const gfxRect &aTargetBBox,
+ const Matrix &aTargetCTM,
+ nsIFrame *aTarget)
+{
+ // We need to initialize our box
+ float x,y,width,height;
+
+ // Get the pattern x,y,width, and height
+ const nsSVGLength2 *tmpX, *tmpY, *tmpHeight, *tmpWidth;
+ tmpX = GetLengthValue(SVGPatternElement::ATTR_X);
+ tmpY = GetLengthValue(SVGPatternElement::ATTR_Y);
+ tmpHeight = GetLengthValue(SVGPatternElement::ATTR_HEIGHT);
+ tmpWidth = GetLengthValue(SVGPatternElement::ATTR_WIDTH);
+
+ if (aPatternUnits == SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
+ x = nsSVGUtils::ObjectSpace(aTargetBBox, tmpX);
+ y = nsSVGUtils::ObjectSpace(aTargetBBox, tmpY);
+ width = nsSVGUtils::ObjectSpace(aTargetBBox, tmpWidth);
+ height = nsSVGUtils::ObjectSpace(aTargetBBox, tmpHeight);
+ } else {
+ float scale = MaxExpansion(aTargetCTM);
+ x = nsSVGUtils::UserSpace(aTarget, tmpX) * scale;
+ y = nsSVGUtils::UserSpace(aTarget, tmpY) * scale;
+ width = nsSVGUtils::UserSpace(aTarget, tmpWidth) * scale;
+ height = nsSVGUtils::UserSpace(aTarget, tmpHeight) * scale;
+ }
+
+ return gfxRect(x, y, width, height);
+}
+
+gfxMatrix
+nsSVGPatternFrame::ConstructCTM(const nsSVGViewBox& aViewBox,
+ uint16_t aPatternContentUnits,
+ uint16_t aPatternUnits,
+ const gfxRect &callerBBox,
+ const Matrix &callerCTM,
+ nsIFrame *aTarget)
+{
+ SVGSVGElement *ctx = nullptr;
+ nsIContent* targetContent = aTarget->GetContent();
+ gfxFloat scaleX, scaleY;
+
+ // The objectBoundingBox conversion must be handled in the CTM:
+ if (IncludeBBoxScale(aViewBox, aPatternContentUnits, aPatternUnits)) {
+ scaleX = callerBBox.Width();
+ scaleY = callerBBox.Height();
+ } else {
+ if (targetContent->IsSVGElement()) {
+ ctx = static_cast<nsSVGElement*>(targetContent)->GetCtx();
+ }
+ scaleX = scaleY = MaxExpansion(callerCTM);
+ }
+
+ if (!aViewBox.IsExplicitlySet()) {
+ return gfxMatrix(scaleX, 0.0, 0.0, scaleY, 0.0, 0.0);
+ }
+ const nsSVGViewBoxRect viewBoxRect = aViewBox.GetAnimValue();
+
+ if (viewBoxRect.height <= 0.0f || viewBoxRect.width <= 0.0f) {
+ return gfxMatrix(0.0, 0.0, 0.0, 0.0, 0.0, 0.0); // singular
+ }
+
+ float viewportWidth, viewportHeight;
+ if (targetContent->IsSVGElement()) {
+ // If we're dealing with an SVG target only retrieve the context once.
+ // Calling the nsIFrame* variant of GetAnimValue would look it up on
+ // every call.
+ viewportWidth =
+ GetLengthValue(SVGPatternElement::ATTR_WIDTH)->GetAnimValue(ctx);
+ viewportHeight =
+ GetLengthValue(SVGPatternElement::ATTR_HEIGHT)->GetAnimValue(ctx);
+ } else {
+ // No SVG target, call the nsIFrame* variant of GetAnimValue.
+ viewportWidth =
+ GetLengthValue(SVGPatternElement::ATTR_WIDTH)->GetAnimValue(aTarget);
+ viewportHeight =
+ GetLengthValue(SVGPatternElement::ATTR_HEIGHT)->GetAnimValue(aTarget);
+ }
+
+ if (viewportWidth <= 0.0f || viewportHeight <= 0.0f) {
+ return gfxMatrix(0.0, 0.0, 0.0, 0.0, 0.0, 0.0); // singular
+ }
+
+ Matrix tm = SVGContentUtils::GetViewBoxTransform(
+ viewportWidth * scaleX, viewportHeight * scaleY,
+ viewBoxRect.x, viewBoxRect.y,
+ viewBoxRect.width, viewBoxRect.height,
+ GetPreserveAspectRatio());
+
+ return ThebesMatrix(tm);
+}
+
+//----------------------------------------------------------------------
+// nsSVGPaintServerFrame methods:
+
+already_AddRefed<gfxPattern>
+nsSVGPatternFrame::GetPaintServerPattern(nsIFrame *aSource,
+ const DrawTarget* aDrawTarget,
+ const gfxMatrix& aContextMatrix,
+ nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
+ float aGraphicOpacity,
+ const gfxRect *aOverrideBounds)
+{
+ if (aGraphicOpacity == 0.0f) {
+ RefPtr<gfxPattern> pattern = new gfxPattern(Color());
+ return pattern.forget();
+ }
+
+ // Paint it!
+ Matrix pMatrix;
+ RefPtr<SourceSurface> surface =
+ PaintPattern(aDrawTarget, &pMatrix, ToMatrix(aContextMatrix), aSource,
+ aFillOrStroke, aGraphicOpacity, aOverrideBounds);
+
+ if (!surface) {
+ return nullptr;
+ }
+
+ RefPtr<gfxPattern> pattern = new gfxPattern(surface, pMatrix);
+
+ if (!pattern || pattern->CairoStatus())
+ return nullptr;
+
+ pattern->SetExtend(ExtendMode::REPEAT);
+ return pattern.forget();
+}
+
+// -------------------------------------------------------------------------
+// Public functions
+// -------------------------------------------------------------------------
+
+nsIFrame* NS_NewSVGPatternFrame(nsIPresShell* aPresShell,
+ nsStyleContext* aContext)
+{
+ return new (aPresShell) nsSVGPatternFrame(aContext);
+}
+