fix utf32 text in subpixel mode

src/core/SkPaint.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 "SkPaint.h"
 #include "SkAnnotation.h"
@@ skipping 906 matching lines @@
     *text = (const char*)ptr;
     return cache->getUnicharMetrics(uni);
 }
 
 static const SkGlyph& sk_getMetrics_utf32_xy(SkGlyphCache* cache,
                                     const char** text, SkFixed x, SkFixed y) {
     SkASSERT(cache != NULL);
     SkASSERT(text != NULL);
 
     const int32_t* ptr = *(const int32_t**)text;
-    SkUnichar uni = *--ptr;
+    SkUnichar uni = *ptr++;
     *text = (const char*)ptr;
     return cache->getUnicharMetrics(uni, x, y);
 }
 
 static const SkGlyph& sk_getMetrics_glyph_00(SkGlyphCache* cache,
                                          const char** text, SkFixed, SkFixed) {
     SkASSERT(cache != NULL);
     SkASSERT(text != NULL);
 
     const uint16_t* ptr = *(const uint16_t**)text;
@@ skipping 1798 matching lines @@
     }
 #ifdef SK_BUILD_FOR_ANDROID
     if (dirty & kPaintOptionsAndroid_DirtyBit) {
         SkPaintOptionsAndroid options;
         options.unflatten(buffer);
         paint->setPaintOptionsAndroid(options);
     }
 #endif
     SkASSERT(dirty == paint->fDirtyBits);
 }