commit 6b38eabc16c2c002d982e5ffbd376aa09c1781b7
author reed <reed@google.com> Thu Jul 30 05:46:05 2015 -0700
committer Commit bot <commit-bot@chromium.org> Thu Jul 30 05:46:05 2015 -0700
tree b42f6ec3a65cf82ddaa6c71f429c339e4ea8acde
parent 6c72d5740231f47c664a8e765a8df05cd124c88c

add helper to create RSXform w/ anchorPt

BUG=skia:

Review URL: https://codereview.chromium.org/1269563006

samplecode/SampleAtlas.cpp

diff --git a/samplecode/SampleAtlas.cpp b/samplecode/SampleAtlas.cpp
index ed208c3..079d679 100644
--- a/samplecode/SampleAtlas.cpp
+++ b/samplecode/SampleAtlas.cpp
@@ -96,18 +96,8 @@
         }
         
         SkRSXform asRSXform() const {
-            SkMatrix m;
-            m.setTranslate(-8, -8);
-            m.postScale(fScale, fScale);
-            m.postRotate(SkRadiansToDegrees(fRadian));
-            m.postTranslate(fCenter.fX, fCenter.fY);
-
-            SkRSXform x;
-            x.fSCos = m.getScaleX();
-            x.fSSin = m.getSkewY();
-            x.fTx = m.getTranslateX();
-            x.fTy = m.getTranslateY();
-            return x;
+            return SkRSXform::MakeFromRadians(fScale, fRadian, fCenter.x(), fCenter.y(),
+                                              SkScalarHalf(kCellSize), SkScalarHalf(kCellSize));
         }
     };
 
@@ -138,7 +128,7 @@
                 fRec[i].fVelocity.fX = rand.nextSScalar1() * kMaxSpeed;
                 fRec[i].fVelocity.fY = rand.nextSScalar1() * kMaxSpeed;
                 fRec[i].fScale = 1;
-                fRec[i].fDScale = rand.nextSScalar1() / 4;
+                fRec[i].fDScale = rand.nextSScalar1() / 16;
                 fRec[i].fRadian = 0;
                 fRec[i].fDRadian = rand.nextSScalar1() / 8;
                 fRec[i].fAlpha = rand.nextUScalar1();