Fix vertical text scaling on Mac.

src/core/SkDraw.cpp

 /*
  * Copyright 2006 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 "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 1409 matching lines @@
     SkTextToPathIter iter(text, byteLength, paint, true);
 
     SkMatrix    matrix;
     matrix.setScale(iter.getPathScale(), iter.getPathScale());
     matrix.postTranslate(x, y);
 
     const SkPath* iterPath;
     SkScalar xpos, prevXPos = 0;
 
     while (iter.next(&iterPath, &xpos)) {
-        matrix.postTranslate(xpos - prevXPos, 0);
+        SkScalar delta = xpos - prevXPos;

[bungeman-skia, 2013/05/10 22:30:36]

This is probably a bad solution, it's rather strange that SkTextToPathIter known
about vertical text, but still uses a total scalar advance instead of a total
vector advance. Perhaps SkTextToPathIter should get some attention.

I wanted to make sure that the path stuff was working, and the easiest way to do
that was to hit 'k' in SampleApp. Doing so made all the text lay out
horizontally, but by vertical metrics.

This change need not be part of the final CL, but we should fix this.

+        if (paint.isVerticalText()) {
+            matrix.postTranslate(0, delta);
+        } else {
+            matrix.postTranslate(delta, 0);
+        }
+
         if (iterPath) {
             const SkPaint& pnt = iter.getPaint();
             if (fDevice) {
                 fDevice->drawPath(*this, *iterPath, pnt, &matrix, false);
             } else {
                 this->drawPath(*iterPath, pnt, &matrix, false);
             }
         }
         prevXPos = xpos;
     }
@@ skipping 1336 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }