CGContextRef
gfxQuartzNativeDrawing::BeginNativeDrawing()
{
NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
DrawTarget *dt = mDrawTarget;
if (dt->IsDualDrawTarget() || dt->IsTiledDrawTarget() ||
dt->GetBackendType() != BackendType::SKIA || dt->IsRecording()) {
// We need a DrawTarget that we can get a CGContextRef from:
Matrix transform = dt->GetTransform();
mNativeRect = transform.TransformBounds(mNativeRect);
mNativeRect.RoundOut();
if (mNativeRect.IsEmpty()) {
return nullptr;
}
mTempDrawTarget =
Factory::CreateDrawTarget(BackendType::SKIA,
IntSize::Truncate(mNativeRect.width, mNativeRect.height),
SurfaceFormat::B8G8R8A8);
if (!mTempDrawTarget) {
return nullptr;
}
transform.PostTranslate(-mNativeRect.x, -mNativeRect.y);
mTempDrawTarget->SetTransform(transform);
dt = mTempDrawTarget;
} else {
// Clip the DT in case BorrowedCGContext needs to create a new layer.
// This prevents it from creating a new layer the size of the window.
// But make sure that this clip is device pixel aligned.
Matrix transform = dt->GetTransform();
Rect deviceRect = transform.TransformBounds(mNativeRect);
deviceRect.RoundOut();
mNativeRect = transform.Inverse().TransformBounds(deviceRect);
mDrawTarget->PushClipRect(mNativeRect);
}
MOZ_ASSERT(dt->GetBackendType() == BackendType::SKIA);
mCGContext = mBorrowedContext.Init(dt);
if (NS_WARN_IF(!mCGContext)) {
// Failed borrowing CG context, so we need to clean up.
if (!mTempDrawTarget) {
mDrawTarget->PopClip();
}
return nullptr;
}
return mCGContext;
}
void
DrawTargetD2D1::Mask(const Pattern &aSource,
const Pattern &aMask,
const DrawOptions &aOptions)
{
PrepareForDrawing(aOptions.mCompositionOp, aSource);
RefPtr<ID2D1Brush> source = CreateBrushForPattern(aSource, aOptions.mAlpha);
RefPtr<ID2D1Brush> mask = CreateBrushForPattern(aMask, 1.0f);
mDC->PushLayer(D2D1::LayerParameters(D2D1::InfiniteRect(), nullptr,
D2D1_ANTIALIAS_MODE_PER_PRIMITIVE,
D2D1::IdentityMatrix(),
1.0f, mask),
nullptr);
Rect rect(0, 0, (Float)mSize.width, (Float)mSize.height);
Matrix mat = mTransform;
mat.Invert();
mDC->FillRectangle(D2DRect(mat.TransformBounds(rect)), source);
mDC->PopLayer();
FinalizeDrawing(aOptions.mCompositionOp, aSource);
}
bool
SVGLineElement::GetGeometryBounds(
Rect* aBounds, const StrokeOptions& aStrokeOptions, const Matrix& aTransform)
{
float x1, y1, x2, y2;
GetAnimatedLengthValues(&x1, &y1, &x2, &y2, nullptr);
if (aStrokeOptions.mLineWidth <= 0) {
*aBounds = Rect(aTransform * Point(x1, y1), Size());
aBounds->ExpandToEnclose(aTransform * Point(x2, y2));
return true;
}
if (aStrokeOptions.mLineCap == CapStyle::ROUND) {
if (!aTransform.IsRectilinear()) {
// TODO: handle this case.
return false;
}
Rect bounds(Point(x1, y1), Size());
bounds.ExpandToEnclose(Point(x2, y2));
bounds.Inflate(aStrokeOptions.mLineWidth / 2.f);
*aBounds = aTransform.TransformBounds(bounds);
return true;
}
Float length = Float(NS_hypot(x2 - x1, y2 - y1));
Float xDelta;
Float yDelta;
if (aStrokeOptions.mLineCap == CapStyle::BUTT) {
if (length == 0.f) {
xDelta = yDelta = 0.f;
} else {
Float ratio = aStrokeOptions.mLineWidth / 2.f / length;
xDelta = ratio * (y2 - y1);
yDelta = ratio * (x2 - x1);
}
} else {
MOZ_ASSERT(aStrokeOptions.mLineCap == CapStyle::SQUARE);
if (length == 0.f) {
xDelta = yDelta = aStrokeOptions.mLineWidth / 2.f;
} else {
Float ratio = aStrokeOptions.mLineWidth / 2.f / length;
xDelta = yDelta = ratio * (fabs(y2 - y1) + fabs(x2 - x1));
}
}
Point points[4];
points[0] = Point(x1 - xDelta, y1 - yDelta);
points[1] = Point(x1 + xDelta, y1 + yDelta);
points[2] = Point(x2 + xDelta, y2 + yDelta);
points[3] = Point(x2 - xDelta, y2 - yDelta);
*aBounds = Rect(aTransform * points[0], Size());
for (uint32_t i = 1; i < 4; ++i) {
aBounds->ExpandToEnclose(aTransform * points[i]);
}
return true;
}
bool
nsSVGPolyElement::GetGeometryBounds(Rect* aBounds, Float aStrokeWidth,
CapStyle aCapStyle, const Matrix& aTransform)
{
const SVGPointList &points = mPoints.GetAnimValue();
if (!points.Length()) {
// Rendering of the element is disabled
aBounds->SetEmpty();
return true;
}
if (aStrokeWidth > 0) {
// We don't handle stroke-miterlimit etc. yet
return false;
}
if (aTransform.IsRectilinear()) {
// We can avoid transforming each point and just transform the result.
// Important for large point lists.
Rect bounds(points[0], Size());
for (uint32_t i = 1; i < points.Length(); ++i) {
bounds.ExpandToEnclose(points[i]);
}
*aBounds = aTransform.TransformBounds(bounds);
} else {
*aBounds = Rect(aTransform * points[0], Size());
for (uint32_t i = 1; i < points.Length(); ++i) {
aBounds->ExpandToEnclose(aTransform * points[i]);
}
}
return true;
}
void
gfxContext::Paint(gfxFloat alpha)
{
PROFILER_LABEL("gfxContext", "Paint",
js::ProfileEntry::Category::GRAPHICS);
AzureState &state = CurrentState();
if (state.sourceSurface && !state.sourceSurfCairo &&
!state.patternTransformChanged)
{
// This is the case where a PopGroupToSource has been done and this
// paint is executed without changing the transform or the source.
Matrix oldMat = mDT->GetTransform();
IntSize surfSize = state.sourceSurface->GetSize();
mDT->SetTransform(Matrix::Translation(-state.deviceOffset.x,
-state.deviceOffset.y));
mDT->DrawSurface(state.sourceSurface,
Rect(state.sourceSurfaceDeviceOffset, Size(surfSize.width, surfSize.height)),
Rect(Point(), Size(surfSize.width, surfSize.height)),
DrawSurfaceOptions(), DrawOptions(alpha, GetOp()));
mDT->SetTransform(oldMat);
return;
}
Matrix mat = mDT->GetTransform();
mat.Invert();
Rect paintRect = mat.TransformBounds(Rect(Point(0, 0), Size(mDT->GetSize())));
mDT->FillRect(paintRect, PatternFromState(this),
DrawOptions(Float(alpha), GetOp()));
}
gfxRect
gfxContext::DeviceToUser(const gfxRect& rect) const
{
Matrix matrix = mTransform;
matrix.Invert();
return ThebesRect(matrix.TransformBounds(ToRect(rect)));
}
Rect
PathCG::GetStrokedBounds(const StrokeOptions &aStrokeOptions,
const Matrix &aTransform) const
{
// 10.7 has CGPathCreateCopyByStrokingPath which we could use
// instead of this scratch context business
CGContextRef cg = ScratchContext();
CGContextSaveGState(cg);
CGContextBeginPath(cg);
CGContextAddPath(cg, mPath);
SetStrokeOptions(cg, aStrokeOptions);
CGContextReplacePathWithStrokedPath(cg);
Rect bounds = CGRectToRect(CGContextGetPathBoundingBox(cg));
CGContextRestoreGState(cg);
if (!bounds.IsFinite()) {
return Rect();
}
return aTransform.TransformBounds(bounds);
}
bool
SVGPolyElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace)
{
const SVGPointList &points = mPoints.GetAnimValue();
if (!points.Length()) {
// Rendering of the element is disabled
aBounds->SetEmpty();
return true;
}
if (aStrokeOptions.mLineWidth > 0 || aToNonScalingStrokeSpace) {
// We don't handle non-scaling-stroke or stroke-miterlimit etc. yet
return false;
}
if (aToBoundsSpace.IsRectilinear()) {
// We can avoid transforming each point and just transform the result.
// Important for large point lists.
Rect bounds(points[0], Size());
for (uint32_t i = 1; i < points.Length(); ++i) {
bounds.ExpandToEnclose(points[i]);
}
*aBounds = aToBoundsSpace.TransformBounds(bounds);
} else {
*aBounds = Rect(aToBoundsSpace.TransformPoint(points[0]), Size());
for (uint32_t i = 1; i < points.Length(); ++i) {
aBounds->ExpandToEnclose(aToBoundsSpace.TransformPoint(points[i]));
}
}
return true;
}
bool
PathSkia::StrokeContainsPoint(const StrokeOptions &aStrokeOptions,
const Point &aPoint,
const Matrix &aTransform) const
{
Matrix inverse = aTransform;
inverse.Invert();
Point transformed = inverse * aPoint;
SkPaint paint;
StrokeOptionsToPaint(paint, aStrokeOptions);
SkPath strokePath;
paint.getFillPath(mPath, &strokePath);
Rect bounds = aTransform.TransformBounds(SkRectToRect(strokePath.getBounds()));
if (aPoint.x < bounds.x || aPoint.y < bounds.y ||
aPoint.x > bounds.XMost() || aPoint.y > bounds.YMost()) {
return false;
}
SkRegion pointRect;
pointRect.setRect(int32_t(SkFloatToScalar(transformed.x - 1.f)),
int32_t(SkFloatToScalar(transformed.y - 1.f)),
int32_t(SkFloatToScalar(transformed.x + 1.f)),
int32_t(SkFloatToScalar(transformed.y + 1.f)));
SkRegion pathRegion;
return pathRegion.setPath(strokePath, pointRect);
}
//XXX: what should these functions return for an empty path?
// currently they return CGRectNull {inf,inf, 0, 0}
Rect
PathCG::GetBounds(const Matrix &aTransform) const
{
//XXX: are these bounds tight enough
Rect bounds = CGRectToRect(CGPathGetBoundingBox(mPath));
//XXX: currently this returns the bounds of the transformed bounds
// this is strictly looser than the bounds of the transformed path
return aTransform.TransformBounds(bounds);
}
Rect
PathCairo::GetBounds(const Matrix &aTransform) const
{
CairoTempMatrix(*mPathContext, mTransform);
double x1, y1, x2, y2;
cairo_path_extents(*mPathContext, &x1, &y1, &x2, &y2);
Rect bounds(Float(x1), Float(y1), Float(x2 - x1), Float(y2 - y1));
return aTransform.TransformBounds(bounds);
}
Rect
PathCairo::GetBounds(const Matrix &aTransform) const
{
EnsureContainingContext();
double x1, y1, x2, y2;
cairo_path_extents(mContainingContext, &x1, &y1, &x2, &y2);
Rect bounds(Float(x1), Float(y1), Float(x2 - x1), Float(y2 - y1));
return aTransform.TransformBounds(bounds);
}
Rect
PathSkia::GetStrokedBounds(const StrokeOptions &aStrokeOptions,
const Matrix &aTransform) const
{
SkPaint paint;
StrokeOptionsToPaint(paint, aStrokeOptions);
SkPath result;
paint.getFillPath(mPath, &result);
Rect bounds = SkRectToRect(result.getBounds());
return aTransform.TransformBounds(bounds);
}
Rect
PathCairo::GetStrokedBounds(const StrokeOptions &aStrokeOptions,
const Matrix &aTransform) const
{
EnsureContainingContext();
double x1, y1, x2, y2;
SetCairoStrokeOptions(mContainingContext, aStrokeOptions);
cairo_stroke_extents(mContainingContext, &x1, &y1, &x2, &y2);
Rect bounds((Float)x1, (Float)y1, (Float)(x2 - x1), (Float)(y2 - y1));
return aTransform.TransformBounds(bounds);
}
gfxRect
gfxContext::GetClipExtents()
{
Rect rect = GetAzureDeviceSpaceClipBounds();
if (rect.width == 0 || rect.height == 0) {
return gfxRect(0, 0, 0, 0);
}
Matrix mat = mTransform;
mat.Invert();
rect = mat.TransformBounds(rect);
return ThebesRect(rect);
}
/* For the purposes of the update/invalidation logic pretend to
be a rectangle. */
bool
SVGImageElement::GetGeometryBounds(Rect* aBounds, Float aStrokeWidth,
CapStyle aCapStyle, const Matrix& aTransform)
{
Rect rect;
GetAnimatedLengthValues(&rect.x, &rect.y, &rect.width,
&rect.height, nullptr);
if (rect.IsEmpty()) {
// Rendering of the element disabled
rect.SetEmpty(); // Make sure width/height are zero and not negative
}
*aBounds = aTransform.TransformBounds(rect);
return true;
}
/* For the purposes of the update/invalidation logic pretend to
be a rectangle. */
bool
SVGImageElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace)
{
Rect rect;
GetAnimatedLengthValues(&rect.x, &rect.y, &rect.width,
&rect.height, nullptr);
if (rect.IsEmpty()) {
// Rendering of the element disabled
rect.SetEmpty(); // Make sure width/height are zero and not negative
}
*aBounds = aToBoundsSpace.TransformBounds(rect);
return true;
}
/* SVG font code can change the transform after having set the pattern on the
* context. When the pattern is set it is in user space, if the transform is
* changed after doing so the pattern needs to be converted back into userspace.
* We just store the old pattern transform here so that we only do the work
* needed here if the pattern is actually used.
* We need to avoid doing this when this ChangeTransform comes from a restore,
* since the current pattern and the current transform are both part of the
* state we know the new CurrentState()'s values are valid. But if we assume
* a change they might become invalid since patternTransformChanged is part of
* the state and might be false for the restored AzureState.
*/
void
gfxContext::ChangeTransform(const Matrix &aNewMatrix, bool aUpdatePatternTransform)
{
AzureState &state = CurrentState();
if (aUpdatePatternTransform && (state.pattern || state.sourceSurface)
&& !state.patternTransformChanged) {
state.patternTransform = GetDTTransform();
state.patternTransformChanged = true;
}
if (mPathIsRect) {
Matrix invMatrix = aNewMatrix;
invMatrix.Invert();
Matrix toNewUS = mTransform * invMatrix;
if (toNewUS.IsRectilinear()) {
mRect = toNewUS.TransformBounds(mRect);
mRect.NudgeToIntegers();
} else {
mPathBuilder = mDT->CreatePathBuilder(FillRule::FILL_WINDING);
mPathBuilder->MoveTo(toNewUS * mRect.TopLeft());
mPathBuilder->LineTo(toNewUS * mRect.TopRight());
mPathBuilder->LineTo(toNewUS * mRect.BottomRight());
mPathBuilder->LineTo(toNewUS * mRect.BottomLeft());
mPathBuilder->Close();
mPathIsRect = false;
}
// No need to consider the transform changed now!
mTransformChanged = false;
} else if ((mPath || mPathBuilder) && !mTransformChanged) {
mTransformChanged = true;
mPathTransform = mTransform;
}
mTransform = aNewMatrix;
mDT->SetTransform(GetDTTransform());
}
SVGBBox
nsSVGForeignObjectFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
uint32_t aFlags)
{
SVGForeignObjectElement *content =
static_cast<SVGForeignObjectElement*>(mContent);
float x, y, w, h;
content->GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
if (w < 0.0f) w = 0.0f;
if (h < 0.0f) h = 0.0f;
if (aToBBoxUserspace.IsSingular()) {
// XXX ReportToConsole
return SVGBBox();
}
return aToBBoxUserspace.TransformBounds(gfx::Rect(0.0, 0.0, w, h));
}
ScissorClip::ScissorClip(DrawTargetNVpr* aDrawTarget,
TemporaryRef<ScissorClip> aPrevious,
const Matrix& aTransform,
const Rect& aClipRect, bool& aSuccess)
: Clip(aDrawTarget, aPrevious)
{
aSuccess = false;
if (!aTransform.IsRectilinear()) {
return;
}
if (!aTransform.TransformBounds(aClipRect).ToIntRect(&mScissorRect)) {
return;
}
if (mPrevious) {
mScissorRect.IntersectRect(mScissorRect, mPrevious->mScissorRect);
}
aSuccess = true;
}
SVGBBox
nsSVGInnerSVGFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
uint32_t aFlags)
{
// XXXjwatt It seems like authors would want the result to be clipped by the
// viewport we establish if IsScrollableOverflow() is true. We should
// consider doing that. See bug 1350755.
SVGBBox bbox;
if (aFlags & nsSVGUtils::eForGetClientRects) {
// XXXjwatt For consistency with the old code this code includes the
// viewport we establish in the result, but only includes the bounds of our
// descendants if they are not clipped to that viewport. However, this is
// both inconsistent with Chrome and with the specs. See bug 1350755.
// Ideally getClientRects/getBoundingClientRect should be consistent with
// getBBox.
float x, y, w, h;
static_cast<SVGSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
if (w < 0.0f) w = 0.0f;
if (h < 0.0f) h = 0.0f;
Rect viewport(x, y, w, h);
bbox = aToBBoxUserspace.TransformBounds(viewport);
if (StyleDisplay()->IsScrollableOverflow()) {
return bbox;
}
// Else we're not clipping to our viewport so we fall through and include
// the bounds of our children.
}
SVGBBox descendantsBbox =
nsSVGDisplayContainerFrame::GetBBoxContribution(aToBBoxUserspace, aFlags);
bbox.UnionEdges(descendantsBbox);
return bbox;
}
void
SVGContentUtils::RectilinearGetStrokeBounds(const Rect& aRect,
const Matrix& aToBoundsSpace,
const Matrix& aToNonScalingStrokeSpace,
float aStrokeWidth,
Rect* aBounds)
{
MOZ_ASSERT(aToBoundsSpace.IsRectilinear(),
"aToBoundsSpace must be rectilinear");
MOZ_ASSERT(aToNonScalingStrokeSpace.IsRectilinear(),
"aToNonScalingStrokeSpace must be rectilinear");
Matrix nonScalingToSource = aToNonScalingStrokeSpace.Inverse();
Matrix nonScalingToBounds = nonScalingToSource * aToBoundsSpace;
*aBounds = aToBoundsSpace.TransformBounds(aRect);
// Compute the amounts dx and dy that nonScalingToBounds scales a half-width
// stroke in the x and y directions, and then inflate aBounds by those amounts
// so that when aBounds is transformed back to non-scaling-stroke space
// it will map onto the correct stroked bounds.
Float dx = 0.0f;
Float dy = 0.0f;
// nonScalingToBounds is rectilinear, so either _12 and _21 are zero or _11
// and _22 are zero, and in each case the non-zero entries (from among _11,
// _12, _21, _22) simply scale the stroke width in the x and y directions.
if (FuzzyEqual(nonScalingToBounds._12, 0) &&
FuzzyEqual(nonScalingToBounds._21, 0)) {
dx = (aStrokeWidth / 2.0f) * std::abs(nonScalingToBounds._11);
dy = (aStrokeWidth / 2.0f) * std::abs(nonScalingToBounds._22);
} else {
dx = (aStrokeWidth / 2.0f) * std::abs(nonScalingToBounds._21);
dy = (aStrokeWidth / 2.0f) * std::abs(nonScalingToBounds._12);
}
aBounds->Inflate(dx, dy);
}
Rect
PathSkia::GetBounds(const Matrix &aTransform) const
{
Rect bounds = SkRectToRect(mPath.getBounds());
return aTransform.TransformBounds(bounds);
}
already_AddRefed<SourceSurface>
nsSVGPatternFrame::PaintPattern(const DrawTarget* aDrawTarget,
Matrix* patternMatrix,
const Matrix &aContextMatrix,
nsIFrame *aSource,
nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
float aGraphicOpacity,
const gfxRect *aOverrideBounds,
imgDrawingParams& aImgParams)
{
/*
* 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) {
// Either no kids or a bad reference
return nullptr;
}
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> ctx = gfxContext::CreateOrNull(dt);
MOZ_ASSERT(ctx); // already checked the draw target above
if (aGraphicOpacity != 1.0f) {
ctx->Save();
ctx->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<SVGGeometryFrame*>(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)) {
AutoSetRestorePaintServerState paintServer(patternWithChildren);
for (nsIFrame* kid = firstKid; kid;
kid = kid->GetNextSibling()) {
// The CTM of each frame referencing us can be different
nsSVGDisplayableFrame* SVGFrame = do_QueryFrame(kid);
if (SVGFrame) {
SVGFrame->NotifySVGChanged(nsSVGDisplayableFrame::TRANSFORM_CHANGED);
}
gfxMatrix tm = *(patternWithChildren->mCTM);
if (kid->GetContent()->IsSVGElement()) {
tm = static_cast<nsSVGElement*>(kid->GetContent())->
PrependLocalTransformsTo(tm, eUserSpaceToParent);
}
nsSVGUtils::PaintFrameWithEffects(kid, *ctx, tm, aImgParams);
}
}
patternWithChildren->mSource = nullptr;
if (aGraphicOpacity != 1.0f) {
ctx->PopGroupAndBlend();
ctx->Restore();
}
// caller now owns the surface
return dt->Snapshot();
}
bool
SVGLineElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace)
{
float x1, y1, x2, y2;
GetAnimatedLengthValues(&x1, &y1, &x2, &y2, nullptr);
if (aStrokeOptions.mLineWidth <= 0) {
*aBounds = Rect(aToBoundsSpace.TransformPoint(Point(x1, y1)), Size());
aBounds->ExpandToEnclose(aToBoundsSpace.TransformPoint(Point(x2, y2)));
return true;
}
// transform from non-scaling-stroke space to the space in which we compute
// bounds
Matrix nonScalingToBounds;
if (aToNonScalingStrokeSpace) {
MOZ_ASSERT(!aToNonScalingStrokeSpace->IsSingular());
Matrix nonScalingToUser = aToNonScalingStrokeSpace->Inverse();
nonScalingToBounds = nonScalingToUser * aToBoundsSpace;
}
if (aStrokeOptions.mLineCap == CapStyle::ROUND) {
if (!aToBoundsSpace.IsRectilinear() ||
(aToNonScalingStrokeSpace &&
!aToNonScalingStrokeSpace->IsRectilinear())) {
// TODO: handle this case.
return false;
}
Rect bounds(Point(x1, y1), Size());
bounds.ExpandToEnclose(Point(x2, y2));
if (aToNonScalingStrokeSpace) {
bounds = aToNonScalingStrokeSpace->TransformBounds(bounds);
bounds.Inflate(aStrokeOptions.mLineWidth / 2.f);
*aBounds = nonScalingToBounds.TransformBounds(bounds);
} else {
bounds.Inflate(aStrokeOptions.mLineWidth / 2.f);
*aBounds = aToBoundsSpace.TransformBounds(bounds);
}
return true;
}
// Handle butt and square linecap, normal and non-scaling stroke cases
// together: start with endpoints (x1, y1), (x2, y2) in the stroke space,
// compute the four corners of the stroked line, transform the corners to
// bounds space, and compute bounds there.
if (aToNonScalingStrokeSpace) {
Point nonScalingSpaceP1, nonScalingSpaceP2;
nonScalingSpaceP1 = aToNonScalingStrokeSpace->TransformPoint(Point(x1, y1));
nonScalingSpaceP2 = aToNonScalingStrokeSpace->TransformPoint(Point(x2, y2));
x1 = nonScalingSpaceP1.x;
y1 = nonScalingSpaceP1.y;
x2 = nonScalingSpaceP2.x;
y2 = nonScalingSpaceP2.y;
}
Float length = Float(NS_hypot(x2 - x1, y2 - y1));
Float xDelta;
Float yDelta;
Point points[4];
if (aStrokeOptions.mLineCap == CapStyle::BUTT) {
if (length == 0.f) {
xDelta = yDelta = 0.f;
} else {
Float ratio = aStrokeOptions.mLineWidth / 2.f / length;
xDelta = ratio * (y2 - y1);
yDelta = ratio * (x2 - x1);
}
points[0] = Point(x1 - xDelta, y1 + yDelta);
points[1] = Point(x1 + xDelta, y1 - yDelta);
points[2] = Point(x2 + xDelta, y2 - yDelta);
points[3] = Point(x2 - xDelta, y2 + yDelta);
} else {
MOZ_ASSERT(aStrokeOptions.mLineCap == CapStyle::SQUARE);
if (length == 0.f) {
xDelta = yDelta = aStrokeOptions.mLineWidth / 2.f;
points[0] = Point(x1 - xDelta, y1 + yDelta);
points[1] = Point(x1 - xDelta, y1 - yDelta);
points[2] = Point(x1 + xDelta, y1 - yDelta);
points[3] = Point(x1 + xDelta, y1 + yDelta);
} else {
Float ratio = aStrokeOptions.mLineWidth / 2.f / length;
yDelta = ratio * (x2 - x1);
xDelta = ratio * (y2 - y1);
points[0] = Point(x1 - yDelta - xDelta, y1 - xDelta + yDelta);
points[1] = Point(x1 - yDelta + xDelta, y1 - xDelta - yDelta);
points[2] = Point(x2 + yDelta + xDelta, y2 + xDelta - yDelta);
points[3] = Point(x2 + yDelta - xDelta, y2 + xDelta + yDelta);
}
}
const Matrix& toBoundsSpace = aToNonScalingStrokeSpace ?
nonScalingToBounds : aToBoundsSpace;
*aBounds = Rect(toBoundsSpace.TransformPoint(points[0]), Size());
for (uint32_t i = 1; i < 4; ++i) {
aBounds->ExpandToEnclose(toBoundsSpace.TransformPoint(points[i]));
}
return true;
}
