Remove unwanted gFTMutex from DirectWrite port.

src/ports/SkFontHost_win_dw.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTypes.h"
 #undef GetGlyphIndices
 
@@ skipping 18 matching lines @@
 #include "SkStream.h"
 #include "SkString.h"
 #include "SkTScopedComPtr.h"
 #include "SkThread.h"
 #include "SkTypeface_win.h"
 #include "SkTypefaceCache.h"
 #include "SkUtils.h"
 
 #include <dwrite.h>
 
-SK_DECLARE_STATIC_MUTEX(gFTMutex);
-
 static bool isLCD(const SkScalerContext::Rec& rec) {
     return SkMask::kLCD16_Format == rec.fMaskFormat ||
            SkMask::kLCD32_Format == rec.fMaskFormat;
 }
 
 /** Prefer to use this type to prevent template proliferation. */
 typedef SkAutoSTMalloc<16, WCHAR> SkSMallocWCHAR;
 
 static HRESULT cstring_to_wchar(const char* skname, SkSMallocWCHAR* name) {
     int wlen = MultiByteToWideChar(CP_UTF8, 0, skname, -1, NULL, 0);
@@ skipping 661 matching lines @@
 
     return wcscmp(dwFaceFontFamilyNameChar.get(), dwFontFamilyNameChar.get()) == 0 &&
            wcscmp(dwFaceFontNameChar.get(), dwFontNameChar.get()) == 0;
 }
 
 SkScalerContext_DW::SkScalerContext_DW(DWriteFontTypeface* typeface,
                                                  const SkDescriptor* desc)
         : SkScalerContext(typeface, desc)
         , fTypeface(SkRef(typeface))
         , fGlyphCount(-1) {
-    SkAutoMutexAcquire ac(gFTMutex);
 
     fXform.m11 = SkScalarToFloat(fRec.fPost2x2[0][0]);
     fXform.m12 = SkScalarToFloat(fRec.fPost2x2[1][0]);
     fXform.m21 = SkScalarToFloat(fRec.fPost2x2[0][1]);
     fXform.m22 = SkScalarToFloat(fRec.fPost2x2[1][1]);
     fXform.dx = 0;
     fXform.dy = 0;
 
     fOffscreen.init(fTypeface->fDWriteFontFace.get(), fXform, SkScalarToFloat(fRec.fTextSize));
 }
@@ skipping 235 matching lines @@
             U8CPU r = sk_apply_lut_if<APPLY_PREBLEND>(*(src++), tableR);
             U8CPU g = sk_apply_lut_if<APPLY_PREBLEND>(*(src++), tableG);
             U8CPU b = sk_apply_lut_if<APPLY_PREBLEND>(*(src++), tableB);
             dst[i] = SkPackARGB32(0xFF, r, g, b);
         }
         dst = (SkPMColor*)((char*)dst + dstRB);
     }
 }
 
 void SkScalerContext_DW::generateImage(const SkGlyph& glyph) {
-    SkAutoMutexAcquire ac(gFTMutex);
-
     const bool isBW = SkMask::kBW_Format == fRec.fMaskFormat;
     const bool isAA = !isLCD(fRec);
 
     //Create the mask.
     const void* bits = fOffscreen.draw(glyph, isBW);
     if (!bits) {
         sk_bzero(glyph.fImage, glyph.computeImageSize());
         return;
     }
 
@@ skipping 17 matching lines @@
         SkASSERT(SkMask::kLCD32_Format == glyph.fMaskFormat);
         if (fPreBlend.isApplicable()) {
             rgb_to_lcd32<true>(src, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
         } else {
             rgb_to_lcd32<false>(src, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB);
         }
     }
 }
 
 void SkScalerContext_DW::generatePath(const SkGlyph& glyph, SkPath* path) {
-    SkAutoMutexAcquire ac(gFTMutex);
-
     SkASSERT(&glyph && path);
 
     path->reset();
 
     SkTScopedComPtr<IDWriteGeometrySink> geometryToPath;
     HRVM(SkDWriteGeometrySink::Create(path, &geometryToPath),
          "Could not create geometry to path converter.");
     uint16_t glyphId = glyph.getGlyphID();
     //TODO: convert to<->from DIUs? This would make a difference if hinting.
     //It may not be needed, it appears that DirectWrite only hints at em size.
@@ skipping 876 matching lines @@
         SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName.");
     } else {
         localeNameLen = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH);
         if (localeNameLen) {
             localeName = localeNameStorage;
         };
     }
 
     return SkNEW_ARGS(SkFontMgr_DirectWrite, (sysFontCollection.get(), localeName, localeNameLen));
 }