Factor code to rotate a canvas about a point.

SkMatrix::scale and ::rotate take a point around which to scale or rotate.
Canvas lacks these helpers, so the code to rotate a canvas around a
point has been duplicated many times. Factor all of these
implementations into SkCanvas::rotate.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2142033002

Review-Url: https://codereview.chromium.org/2142033002

1 files changed, 1 insertions, 12 deletions

diff --git a/gm/fontscaler.cpp b/gm/fontscaler.cpp
index 69cf346c4d..cc9815c9d9 100644
--- a/gm/fontscaler.cpp
+++ b/gm/fontscaler.cpp
@@ -15,9 +15,6 @@ public:
         this->setBGColor(0xFFFFFFFF);
     }
 
-    virtual ~FontScalerGM() {
-    }
-
 protected:
 
     SkString onShortName() override {
@@ -30,14 +27,6 @@ protected:
         return SkISize::Make(1450, 750);
     }
 
-    static void rotate_about(SkCanvas* canvas,
-                             SkScalar degrees,
-                             SkScalar px, SkScalar py) {
-        canvas->translate(px, py);
-        canvas->rotate(degrees);
-        canvas->translate(-px, -py);
-    }
-
     void onDraw(SkCanvas* canvas) override {
         SkPaint paint;
 
@@ -59,7 +48,7 @@ protected:
                 SkAutoCanvasRestore acr(canvas, true);
                 canvas->translate(SkIntToScalar(50 + i * 230),
                                   SkIntToScalar(20));
-                rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
+                canvas->rotate(SkIntToScalar(i * 5), x, y * 10);
 
                 {
                     SkPaint p;