[SVGDom] Add viewBox support

The main feature is <svg> viewBox and proper viewport support, but the CL
touches a few other things:

* refactor SkSVGRenderContext to auto-restore canvas state, and split the
  presentation bits into a separate CoW SkSVGPresentationContext

* introduce SkSVGNode::onPrepareToRender(), as a way for nodes to push their
  custom state before the actual onRender() call (instead of relying on
  non-virtual SkSVGNode to know about all possible state bits)

* add a "Type" suffix to SVG types, to disambiguate (e.g. SkSVGRectType vs.
  SkSVGRect)

R=robertphillips@google.com,stephana@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2222793002

Review-Url: https://codereview.chromium.org/2222793002

1 files changed, 5 insertions, 5 deletions

diff --git a/experimental/svg/model/SkSVGShape.cpp b/experimental/svg/model/SkSVGShape.cpp
index d26eff482d..ad4b5cedae 100644
--- a/experimental/svg/model/SkSVGShape.cpp
+++ b/experimental/svg/model/SkSVGShape.cpp
@@ -10,13 +10,13 @@
 
 SkSVGShape::SkSVGShape(SkSVGTag t) : INHERITED(t) {}
 
-void SkSVGShape::onRender(SkCanvas* canvas, const SkSVGRenderContext& ctx) const {
-    if (const SkPaint* fillPaint = ctx.fillPaint()) {
-        this->onDraw(canvas, ctx.lengthContext(), *fillPaint);
+void SkSVGShape::onRender(const SkSVGRenderContext& ctx) const {
+    if (const SkPaint* fillPaint = ctx.presentationContext().fillPaint()) {
+        this->onDraw(ctx.canvas(), ctx.lengthContext(), *fillPaint);
     }
 
-    if (const SkPaint* strokePaint = ctx.strokePaint()) {
-        this->onDraw(canvas, ctx.lengthContext(), *strokePaint);
+    if (const SkPaint* strokePaint = ctx.presentationContext().strokePaint()) {
+        this->onDraw(ctx.canvas(), ctx.lengthContext(), *strokePaint);
     }
 }