"Modularize" SkSG

* relocate all SkSG-related files under modules/sksg/
* fix various tidbits to make non-sksg builds possible
* drop obsolete SampleSGInval.cpp

Change-Id: I54e6c5bb1a09f45030fa8d607b3eb3f7cba78957
Reviewed-on: https://skia-review.googlesource.com/130025
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Klein <mtklein@google.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/modules/sksg/src/SkSGDraw.cpp b/modules/sksg/src/SkSGDraw.cpp
new file mode 100644
index 0000000000..b73bf3b577
--- /dev/null
+++ b/modules/sksg/src/SkSGDraw.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkSGDraw.h"
+
+#include "SkSGGeometryNode.h"
+#include "SkSGInvalidationController.h"
+#include "SkSGPaintNode.h"
+
+namespace sksg {
+
+Draw::Draw(sk_sp<GeometryNode> geometry, sk_sp<PaintNode> paint)
+    : fGeometry(std::move(geometry))
+    , fPaint(std::move(paint)) {
+    this->observeInval(fGeometry);
+    this->observeInval(fPaint);
+}
+
+Draw::~Draw() {
+    this->unobserveInval(fGeometry);
+    this->unobserveInval(fPaint);
+}
+
+void Draw::onRender(SkCanvas* canvas) const {
+    const auto& paint   = fPaint->makePaint();
+    const auto skipDraw = paint.nothingToDraw() ||
+            (paint.getStyle() == SkPaint::kStroke_Style && paint.getStrokeWidth() <= 0);
+
+    if (!skipDraw) {
+        fGeometry->draw(canvas, paint);
+    }
+}
+
+SkRect Draw::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) {
+    SkASSERT(this->hasInval());
+
+    auto bounds = fGeometry->revalidate(ic, ctm);
+    fPaint->revalidate(ic, ctm);
+
+    const auto& paint = fPaint->makePaint();
+    SkASSERT(paint.canComputeFastBounds());
+
+    return paint.computeFastBounds(bounds, &bounds);
+}
+
+} // namespace sksg