commit e5de130788c8637d2f7df9ddb0241b78e04d5882
author vjiaoblack <vjiaoblack@google.com> Wed Jul 13 14:05:28 2016 -0700
committer Commit bot <commit-bot@chromium.org> Wed Jul 13 14:05:28 2016 -0700
tree e837af1f0ce2a87a9b4be70172f74d9a5dea57a4
parent f382b48687176f15091c2defc0002f0a189f4167

Added the framework for having canvas/recorder/picture record depth_set's.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2127233002

Committed: https://skia.googlesource.com/skia/+/6d3fb898d5f73a82e36f11c712a633c3921ed518
Committed: https://skia.googlesource.com/skia/+/1185d90c785f743364cc9113d7007a59af07470c
Review-Url: https://codereview.chromium.org/2127233002

src/core/SkCanvas.cpp

diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index f893a62..0bd3851 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -294,17 +294,22 @@
     SkMatrix        fMatrix;
     int             fDeferredSaveCount;
 
+    // This is the current cumulative depth (aggregate of all done translateZ calls)
+    SkScalar        fCurDrawDepth;
+
     MCRec(bool conservativeRasterClip) : fRasterClip(conservativeRasterClip) {
         fFilter     = nullptr;
         fLayer      = nullptr;
         fTopLayer   = nullptr;
         fMatrix.reset();
         fDeferredSaveCount = 0;
+        fCurDrawDepth      = 0;
 
         // don't bother initializing fNext
         inc_rec();
     }
-    MCRec(const MCRec& prev) : fRasterClip(prev.fRasterClip), fMatrix(prev.fMatrix) {
+    MCRec(const MCRec& prev) : fRasterClip(prev.fRasterClip), fMatrix(prev.fMatrix),
+                               fCurDrawDepth(prev.fCurDrawDepth) {
         fFilter = SkSafeRef(prev.fFilter);
         fLayer = nullptr;
         fTopLayer = prev.fTopLayer;
@@ -1539,6 +1544,16 @@
     this->setMatrix(SkMatrix::I());
 }
 
+void SkCanvas::translateZ(SkScalar z) {
+    this->checkForDeferredSave();
+    this->fMCRec->fCurDrawDepth += z;
+    this->didTranslateZ(z);
+}
+
+SkScalar SkCanvas::getZ() const {
+    return this->fMCRec->fCurDrawDepth;
+}
+
 //////////////////////////////////////////////////////////////////////////////
 
 void SkCanvas::clipRect(const SkRect& rect, SkRegion::Op op, bool doAA) {