SkLiteDL: drawAsLayer()

src/core/SkLiteDL.cpp

Index: src/core/SkLiteDL.cpp
diff --git a/src/core/SkLiteDL.cpp b/src/core/SkLiteDL.cpp
index 8c8abb1cc3232e37ff5d71983e88c734b3cccc11..98315f566b2e17122d0ec4c41c77aa5b4b77afdb 100644
--- a/src/core/SkLiteDL.cpp
+++ b/src/core/SkLiteDL.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "SkCanvas.h"
+#include "SkColorFilter.h"
 #include "SkData.h"
 #include "SkDrawFilter.h"
 #include "SkImageFilter.h"
@@ -14,6 +15,7 @@
 #include "SkPicture.h"
 #include "SkRSXform.h"
 #include "SkTextBlob.h"
+#include "SkXfermode.h"
 
 #ifndef SKLITEDL_PAGE
     #define SKLITEDL_PAGE 4096
@@ -816,3 +818,23 @@ void SkLiteDL::reset(SkRect bounds) {
     fUsed   = 0;
     fBounds = bounds;
 }
+
+void SkLiteDL::drawAsLayer(SkCanvas* c, const SkMatrix* matrix
+                                      , SkColorFilter* cf
+                                      , SkXfermode* xfer
+                                      , U8CPU alpha) {
+    auto fallback_plan = [&] {

[reed1, 2016/09/07 15:29:55]

cool way to construct this.

+        SkPaint p;
+        p.setColorFilter(sk_ref_sp(cf));
+        p.setXfermode(sk_ref_sp(xfer));
+        p.setAlpha(alpha);
+        SkRect bounds = this->getBounds();
+        c->saveLayer(&bounds, &p);
+            this->draw(c, matrix);
+        c->restore();
+    };
+
+    // TODO: single-draw specializations
+
+    return fallback_plan();
+}