+ void setScaleTranslate(SkScalar sx, SkScalar sy, SkScalar tx, SkScalar ty) {
+ fMat[kMScaleX] = sx;
+ fMat[kMSkewX] = 0;
+ fMat[kMTransX] = tx;
+
+ fMat[kMSkewY] = 0;
+ fMat[kMScaleY] = sy;
+ fMat[kMTransY] = ty;
+
+ fMat[kMPersp0] = 0;
+ fMat[kMPersp1] = 0;
+ fMat[kMPersp2] = 1;
+
+ unsigned mask = 0;
+ if (sx != 1 || sy != 1) {
+ mask |= kScale_Mask;
+ }
+ if (tx || ty) {
+ mask |= kTranslate_Mask;
+ }
+ this->setTypeMask(mask | kRectStaysRect_Mask);
+ }
+