simplify handle-affine: subclass overrides just describe their leaf behavior

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkCanvasPriv.h"
@@ skipping 1199 matching lines @@
      *  3. Wack the CTM to be just SCALE, and wrap the imagefilter with a MatrixImageFilter that
      *     contains the REMAINDER
      *  4. Proceed as usual, allowing the client to draw into the layer (now with a scale-only CTM)
      *  5. During restore, we process the MatrixImageFilter, which applies REMAINDER to the output
      *     of the original imagefilter, and draw that (via drawSprite)
      *  6. Unwack the CTM to its original state (i.e. stashedMatrix)
      *
      *  Perhaps in the future we could augment #5 to apply REMAINDER as part of the draw (no longer
      *  a sprite operation) to avoid the extra buffer/overhead of MatrixImageFilter.
      */
-    if (imageFilter && !stashedMatrix.isScaleTranslate() && !imageFilter->canHandleAffine() &&
+    if (imageFilter && !stashedMatrix.isScaleTranslate() && !imageFilter->canHandleComplexCTM() &&
         stashedMatrix.decomposeScale(&scale, &remainder))
     {
         // We will restore the matrix (which we are overwriting here) in restore via fStashedMatrix
         this->internalSetMatrix(SkMatrix::MakeScale(scale.width(), scale.height()));
         SkPaint* p = lazyP.set(*paint);
         p->setImageFilter(SkImageFilter::MakeMatrixFilter(remainder,
                                                           SkFilterQuality::kLow_SkFilterQuality,
                                                           sk_ref_sp(imageFilter)));
         imageFilter = p->getImageFilter();
         paint = p;
@@ skipping 1863 matching lines @@
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }
 
 #ifdef SK_SUPPORT_LEGACY_NEW_SURFACE_API
 SkSurface* SkCanvas::newSurface(const SkImageInfo& info, const SkSurfaceProps* props) {
     return this->makeSurface(info, props).release();
 }
 #endif