drawTextRSXform

gm/drawatlas.cpp

Index: gm/drawatlas.cpp
diff --git a/gm/drawatlas.cpp b/gm/drawatlas.cpp
index a906cbedeba9f2a97f80dbbbeb92321afb7ce91a..d8b77774940bab93144856c7d7ec34d41b93933f 100644
--- a/gm/drawatlas.cpp
+++ b/gm/drawatlas.cpp
@@ -100,3 +100,33 @@ private:
     typedef GM INHERITED;
 };
 DEF_GM( return new DrawAtlasGM; )
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+DEF_SIMPLE_GM(drawTextRSXform, canvas, 1000, 1000) {
+    const char text[] = "ABCDFGHJKLMNOPQRSTUVWXYZ";
+    const int N = sizeof(text) - 1;
+    SkRSXform xform[N];
+
+    canvas->translate(0, 30);
+
+    SkScalar x = 20;
+    SkScalar dx = 20;
+    SkScalar rad = 0;
+    SkScalar drad = 2 * SK_ScalarPI / N;
+    for (int i = 0; i < N; ++i) {
+        xform[i].fSCos = SkScalarCos(rad);
+        xform[i].fSSin = SkScalarSin(rad);
+        xform[i].fTx = x;
+        xform[i].fTy = 0;
+        x += dx;
+        rad += drad;
+    }
+
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setTextSize(20);
+    canvas->drawTextRSXform(text, N, xform, paint);
+}
+
+