Store a <scale, bias> tuple for textLength scale adjustment

third_party/WebKit/Source/core/layout/svg/SVGTextChunkBuilder.h

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGTextChunkBuilder_h
 #define SVGTextChunkBuilder_h
 
 #include "wtf/Allocator.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class AffineTransform;
 class SVGInlineTextBox;
 struct SVGTextFragment;
 
 // SVGTextChunkBuilder performs the third layout phase for SVG text.
 //
 // Phase one built the layout information from the SVG DOM stored in the LayoutSVGInlineText objects (SVGTextLayoutAttributes).
 // Phase two performed the actual per-character layout, computing the final positions for each character, stored in the SVGInlineTextBox objects (SVGTextFragment).
 // Phase three performs all modifications that have to be applied to each individual text chunk (text-anchor & textLength).
 
 class SVGTextChunkBuilder {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder);
 public:
     SVGTextChunkBuilder();
 
     void processTextChunks(const Vector<SVGInlineTextBox*>&);
 
 protected:
     typedef Vector<SVGInlineTextBox*>::const_iterator BoxListConstIterator;
 
     virtual void handleTextChunk(BoxListConstIterator boxStart, BoxListConstIterator boxEnd);
 
 private:
     void processTextLengthSpacingCorrection(bool isVerticalText, float textLengthShift, Vector<SVGTextFragment>&, unsigned& atCharacter);
-    void applyTextLengthScaleAdjustment(const AffineTransform&, Vector<SVGTextFragment>&);
+    void applyTextLengthScaleAdjustment(float textLengthScale, float textLengthBias, Vector<SVGTextFragment>&);
     void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift, Vector<SVGTextFragment>&);
 };
 
 class SVGTextPathChunkBuilder final : public SVGTextChunkBuilder {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(SVGTextPathChunkBuilder);
 public:
     SVGTextPathChunkBuilder();
 
     float totalLength() const { return m_totalLength; }
     unsigned totalCharacters() const { return m_totalCharacters; }
     float totalTextAnchorShift() const { return m_totalTextAnchorShift; }
 
 private:
     void handleTextChunk(BoxListConstIterator boxStart, BoxListConstIterator boxEnd) override;
 
     float m_totalLength;
     unsigned m_totalCharacters;
     float m_totalTextAnchorShift;
 };
 
 } // namespace blink
 
 #endif