Rebased ref, commits from common ancestor:
commit 02b1fed89c0d74bc1c7898eca19266ef36f6c616
Author: Akash Jain <akash...@gmail.com>
Date:   Wed Aug 17 21:31:22 2016 +0530

    GSoC: Speed up CommonSalLayout by caching hb_face
    
    Cache hb_face so it is not created again and again.
    Switch from GDI to DirectWrite on Windows to obtain SFNT table data.
    
    Change-Id: I9c532cd72e1f6b57313f3b7d42a6b9b0633eb0ef

diff --git a/vcl/inc/CommonSalLayout.hxx b/vcl/inc/CommonSalLayout.hxx
index 01641ad..24b4bbc 100755
--- a/vcl/inc/CommonSalLayout.hxx
+++ b/vcl/inc/CommonSalLayout.hxx
@@ -40,6 +40,7 @@ class CommonSalLayout : public GenericSalLayout
 #ifdef _WIN32
     HDC   mhDC;
     HFONT mhFont;
+    D2DWriteTextOutRenderer* mpD2DRenderer;
 #elif defined(MACOSX) || defined(IOS)
     const CoreTextStyle& mrCoreTextStyle;
 #else
@@ -48,7 +49,7 @@ class CommonSalLayout : public GenericSalLayout
 
 public:
 #if defined(_WIN32)
-    explicit                CommonSalLayout(HDC, WinFontInstance&);
+    explicit                CommonSalLayout(WinSalGraphics*, WinFontInstance&, 
const WinFontFace&);
     virtual void            InitFont() const override;
 #elif defined(MACOSX) || defined(IOS)
     explicit                CommonSalLayout(const CoreTextStyle&);
diff --git a/vcl/inc/quartz/salgdi.h b/vcl/inc/quartz/salgdi.h
index 7578768..678b0d1 100644
--- a/vcl/inc/quartz/salgdi.h
+++ b/vcl/inc/quartz/salgdi.h
@@ -45,6 +45,7 @@
 
 #include "quartz/salgdicommon.hxx"
 #include <unordered_map>
+#include <hb-ot.h>
 
 class AquaSalFrame;
 class FontAttributes;
@@ -98,6 +99,8 @@ public:
     void       GetFontMetric( ImplFontMetricDataPtr& ) const;
     bool       GetGlyphBoundRect( sal_GlyphId, Rectangle& ) const;
     bool       GetGlyphOutline( sal_GlyphId, basegfx::B2DPolyPolygon& ) const;
+    hb_face_t* GetHBFace() const { return mpHBFace; }
+    void       SetHBFace(hb_face_t* pHBFace) const { mpHBFace = pHBFace; }
 
     const CoreTextFontFace*  mpFontData;
     /// <1.0: font is squeezed, >1.0 font is stretched, else 1.0
@@ -109,6 +112,7 @@ public:
 private:
     /// CoreText text style object
     CFMutableDictionaryRef  mpStyleDict;
+    mutable hb_face_t*      mpHBFace;
 
     friend class CTLayout;
     friend class AquaSalGraphics;
diff --git a/vcl/inc/unx/glyphcache.hxx b/vcl/inc/unx/glyphcache.hxx
index 04723cb..1c356c5 100644
--- a/vcl/inc/unx/glyphcache.hxx
+++ b/vcl/inc/unx/glyphcache.hxx
@@ -35,6 +35,7 @@
 #include <sallayout.hxx>
 #include "fontattributes.hxx"
 #include "impfontmetricdata.hxx"
+#include "hb-ot.h"
 
 #include <unordered_map>
 
@@ -181,6 +182,8 @@ public:
     sal_GlyphId             FixupGlyphIndex( sal_GlyphId aGlyphId, sal_UCS4 ) 
const;
     bool                    GetGlyphOutline( sal_GlyphId aGlyphId, 
basegfx::B2DPolyPolygon& ) const;
     bool                    GetAntialiasAdvice() const;
+    hb_face_t*              GetHBFace() { return mpHBFace; }
+    void                    SetHBFace( hb_face_t* pHBFace ) { 
mpHBFace=pHBFace; }
 
 private:
     friend class GlyphCache;
@@ -240,6 +243,7 @@ private:
     GlyphSubstitution       maGlyphSubstitution;
 
     ServerFontLayoutEngine* mpLayoutEngine;
+    hb_face_t*              mpHBFace;
 };
 
 // a class for cache entries for physical font instances that are based on 
serverfonts
diff --git a/vcl/inc/win/salgdi.h b/vcl/inc/win/salgdi.h
index bc5165d..961cb47 100644
--- a/vcl/inc/win/salgdi.h
+++ b/vcl/inc/win/salgdi.h
@@ -44,6 +44,9 @@
 #  include "postwin.h"
 #endif
 
+#include <hb-ot.h>
+#include <dwrite.h>
+
 class FontSelectPattern;
 class WinFontInstance;
 class ImplFontAttrCache;
@@ -139,10 +142,12 @@ private:
 
     mutable std::unordered_set<sal_UCS4>      maGsubTable;
     mutable bool            mbGsubRead;
+    mutable hb_face_t*      mpHBFace;
 public:
     bool                    HasGSUBstitutions( HDC ) const;
     bool                    IsGSUBstituted( sal_UCS4 ) const;
-    static int              GetTable( const char pTagName[5], const unsigned 
char*&, HDC );
+    hb_face_t*              GetHBFace() const { return mpHBFace; }
+    void                    SetHBFace( hb_face_t* pHBFace ) const { mpHBFace = 
pHBFace; }
 };
 
 /** Class that creates (and destroys) a compatible Device Context.
@@ -354,6 +359,7 @@ private:
     sal_uLong               GetKernPairs();
 
 public:
+    sal_uLong               GetTable( const char pTagName[5], const unsigned 
char*&, void*&, IDWriteFontFace*& );
     // public SalGraphics methods, the interface to the independent vcl part
 
     // get device resolution
diff --git a/vcl/quartz/ctfonts.cxx b/vcl/quartz/ctfonts.cxx
index c7b54d3..d315705 100644
--- a/vcl/quartz/ctfonts.cxx
+++ b/vcl/quartz/ctfonts.cxx
@@ -50,6 +50,7 @@ CoreTextStyle::CoreTextStyle( const FontSelectPattern& rFSD )
     , mfFontRotation( 0.0 )
     , maFontSelData( rFSD )
     , mpStyleDict( nullptr )
+    , mpHBFace( nullptr )
 {
     const FontSelectPattern* const pReqFont = &rFSD;
 
@@ -116,6 +117,8 @@ CoreTextStyle::~CoreTextStyle()
 {
     if( mpStyleDict )
         CFRelease( mpStyleDict );
+    if( mpHBFace )
+        hb_face_destroy( mpHBFace );
 }
 
 void CoreTextStyle::GetFontMetric( ImplFontMetricDataPtr& rxFontMetric ) const
diff --git a/vcl/source/gdi/CommonSalLayout.cxx 
b/vcl/source/gdi/CommonSalLayout.cxx
index 0358ff1..0cb88f3 100755
--- a/vcl/source/gdi/CommonSalLayout.cxx
+++ b/vcl/source/gdi/CommonSalLayout.cxx
@@ -26,6 +26,21 @@
 #include <limits>
 #include <salgdi.hxx>
 
+#if defined(_WIN32)
+struct WinSalGraphicsWithIDFace
+{
+    WinSalGraphics*     mpWSL;
+    IDWriteFontFace*    mpIDFace;
+    void*               mpTableContext;
+
+    WinSalGraphicsWithIDFace( WinSalGraphics* pWSL, IDWriteFontFace* pIDFace )
+    : mpWSL( pWSL ),
+      mpIDFace( pIDFace ),
+      mpTableContext( nullptr )
+    {}
+};
+#endif
+
 static hb_blob_t *getFontTable(hb_face_t* /*face*/, hb_tag_t nTableTag, void* 
pUserData)
 {
     char pTagName[5];
@@ -38,8 +53,8 @@ static hb_blob_t *getFontTable(hb_face_t* /*face*/, hb_tag_t 
nTableTag, void* pU
     sal_uLong nLength=0;
 #if defined(_WIN32)
     const unsigned char* pBuffer = nullptr;
-    HDC* phDC = static_cast<HDC*>(pUserData);
-    nLength = WinFontFace::GetTable(pTagName, pBuffer, *phDC);
+    WinSalGraphicsWithIDFace* pWSLWithIDFace = 
static_cast<WinSalGraphicsWithIDFace*>(pUserData);
+    nLength = (pWSLWithIDFace->mpWSL)->GetTable(pTagName, pBuffer, 
pWSLWithIDFace->mpTableContext, pWSLWithIDFace->mpIDFace);
 #elif defined(MACOSX) || defined(IOS)
     unsigned char* pBuffer = nullptr;
     CoreTextFontFace* pFont = static_cast<CoreTextFontFace*>(pUserData);
@@ -57,7 +72,15 @@ static hb_blob_t *getFontTable(hb_face_t* /*face*/, hb_tag_t 
nTableTag, void* pU
 
     hb_blob_t* pBlob = nullptr;
     if (pBuffer != nullptr)
-#if defined(_WIN32) || defined(MACOSX) || defined(IOS)
+#if defined(_WIN32)
+        pBlob = hb_blob_create(reinterpret_cast<const char*>(pBuffer), 
nLength, HB_MEMORY_MODE_READONLY, pWSLWithIDFace,
+                               [](void* pUserData)
+                               {
+                                   WinSalGraphicsWithIDFace* pUData = 
static_cast<WinSalGraphicsWithIDFace*>(pUserData);
+                                   
pUData->mpIDFace->ReleaseFontTable(pUData->mpTableContext);
+                               }
+                              );
+#elif defined(MACOSX) || defined(IOS)
         pBlob = hb_blob_create(reinterpret_cast<const char*>(pBuffer), 
nLength, HB_MEMORY_MODE_READONLY,
                                const_cast<unsigned char*>(pBuffer), [](void* 
data){ delete[] reinterpret_cast<unsigned char*>(data); } );
 #else
@@ -77,13 +100,29 @@ static hb_unicode_funcs_t* getUnicodeFuncs()
 }
 
 #if defined(_WIN32)
-CommonSalLayout::CommonSalLayout(HDC hDC, WinFontInstance& rWinFontInstance)
-:   mhDC(hDC),
-    mhFont((HFONT)GetCurrentObject(hDC, OBJ_FONT)),
+CommonSalLayout::CommonSalLayout(WinSalGraphics* WSL, WinFontInstance& 
rWinFontInstance, const WinFontFace& rWinFontFace)
+:   mhFont((HFONT)GetCurrentObject(WSL->getHDC(), OBJ_FONT)),
+    mhDC(WSL->getHDC()),
     mpHBFace(nullptr),
-    maFontSelData(rWinFontInstance.maFontSelData)
+    maFontSelData(rWinFontInstance.maFontSelData),
+    mpD2DRenderer(nullptr)
 {
-    mpHBFace = hb_face_create_for_tables(getFontTable, &hDC, nullptr);
+    mpHBFace = rWinFontFace.GetHBFace();
+    if(!mpHBFace)
+    {
+        mpD2DRenderer = 
dynamic_cast<D2DWriteTextOutRenderer*>(&TextOutRenderer::get());
+        WinSalGraphicsWithIDFace* pWSLWithIDFace = new 
WinSalGraphicsWithIDFace(WSL, mpD2DRenderer->GetDWriteFontFace(mhDC));
+        mpHBFace= hb_face_create_for_tables( getFontTable, pWSLWithIDFace,
+                  [](void* pUserData)
+                  {
+                      WinSalGraphicsWithIDFace* pUData = 
static_cast<WinSalGraphicsWithIDFace*>( pUserData );
+                      if(pUData->mpIDFace)
+                          pUData->mpIDFace->Release();
+                      delete pUData;
+                  }
+                 );
+        rWinFontFace.SetHBFace(mpHBFace);
+    }
 }
 
 void CommonSalLayout::InitFont() const
@@ -97,7 +136,12 @@ CommonSalLayout::CommonSalLayout(const CoreTextStyle& 
rCoreTextStyle)
     maFontSelData(rCoreTextStyle.maFontSelData),
     mrCoreTextStyle(rCoreTextStyle)
 {
-    mpHBFace = hb_face_create_for_tables(getFontTable, 
const_cast<CoreTextFontFace*>(rCoreTextStyle.mpFontData), nullptr);
+    mpHBFace = rCoreTextStyle.GetHBFace();
+    if(!mpHBFace)
+    {
+        mpHBFace = hb_face_create_for_tables(getFontTable, 
const_cast<CoreTextFontFace*>(rCoreTextStyle.mpFontData), nullptr);
+        rCoreTextStyle.SetHBFace(mpHBFace);
+    }
 }
 
 #else
@@ -106,15 +150,15 @@ CommonSalLayout::CommonSalLayout(ServerFont& rServerFont)
     maFontSelData(rServerFont.GetFontSelData()),
     mrServerFont(rServerFont)
 {
-    mpHBFace = hb_face_create_for_tables(getFontTable, &rServerFont, nullptr);
+    mpHBFace = rServerFont.GetHBFace();
+    if(!mpHBFace)
+    {
+        mpHBFace = hb_face_create_for_tables(getFontTable, &rServerFont, 
nullptr);
+        mrServerFont.SetHBFace(mpHBFace);
+    }
 }
 #endif
 
-CommonSalLayout::~CommonSalLayout()
-{
-    hb_face_destroy(mpHBFace);
-}
-
 struct HbScriptRun
 {
     int32_t mnMin;
diff --git a/vcl/unx/generic/glyphs/freetype_glyphcache.cxx 
b/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
index 79744b2..cb2de2a 100644
--- a/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
+++ b/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
@@ -461,7 +461,8 @@ ServerFont::ServerFont( const FontSelectPattern& rFSD, 
FreetypeFontInfo* pFI )
     mbArtItalic( false ),
     mbArtBold( false ),
     mbUseGamma( false ),
-    mpLayoutEngine( nullptr )
+    mpLayoutEngine( nullptr ),
+    mpHBFace( nullptr )
 {
     // TODO: move update of mpFontInstance into FontEntry class when
     // it becomes responsible for the ServerFont instantiation
@@ -610,6 +611,9 @@ ServerFont::~ServerFont()
 
     mpFontInfo->ReleaseFaceFT();
 
+    if( mpHBFace )
+        hb_face_destroy( mpHBFace );
+
     ReleaseFromGarbageCollect();
 }
 
diff --git a/vcl/win/gdi/salfont.cxx b/vcl/win/gdi/salfont.cxx
index 3d0f397..f5cf5aa 100644
--- a/vcl/win/gdi/salfont.cxx
+++ b/vcl/win/gdi/salfont.cxx
@@ -1008,7 +1008,8 @@ WinFontFace::WinFontFace( const FontAttributes& rDFS,
     mnPitchAndFamily( nPitchAndFamily ),
     mbAliasSymbolsHigh( false ),
     mbAliasSymbolsLow( false ),
-    mbGsubRead( false )
+    mbGsubRead( false ),
+    mpHBFace( nullptr )
 {
     SetBitmapSize( 0, nHeight );
 
@@ -1049,6 +1050,9 @@ WinFontFace::~WinFontFace()
 #endif
 #endif // ENABLE_GRAPHITE
     delete mpEncodingVector;
+
+    if( mpHBFace )
+        hb_face_destroy( mpHBFace );
 }
 
 sal_IntPtr WinFontFace::GetFontId() const
@@ -1203,16 +1207,22 @@ void WinFontFace::ReadCmapTable( HDC hDC ) const
     }
 }
 
-int WinFontFace::GetTable(const char pTagName[5], const unsigned char*& 
pResBuffer, HDC hDC)
+sal_uLong WinSalGraphics::GetTable( const char pTagName[5], const unsigned 
char*& pResBuffer, void*& pTableContext, IDWriteFontFace*& pIDFace )
 {
-    const DWORD nTableTag = CalcTag( pTagName );
-    RawFontData aRawFontData( hDC, nTableTag );
-
-    if( !aRawFontData.get() )
+    if( !pIDFace )
         return 0;
-
-    pResBuffer = aRawFontData.steal();
-    return aRawFontData.size();
+    const void* pResBuf;
+    UINT32 nSize;
+    BOOL bExists;
+    HRESULT hr = S_OK;
+    const DWORD nTableTag = DWRITE_MAKE_OPENTYPE_TAG( pTagName[0], 
pTagName[1], pTagName[2], pTagName[3] );
+    hr = pIDFace->TryGetFontTable( nTableTag, &pResBuf, &nSize, 
&pTableContext, &bExists );
+    if( SUCCEEDED( hr ) && ( bExists ) )
+    {
+        pResBuffer = static_cast<const unsigned char*>(pResBuf);
+        return static_cast<sal_uLong>(nSize);
+    }
+    return 0;
 }
 
 void WinFontFace::GetFontCapabilities( HDC hDC ) const
diff --git a/vcl/win/gdi/winlayout.cxx b/vcl/win/gdi/winlayout.cxx
index 538f46a..514029d 100644
--- a/vcl/win/gdi/winlayout.cxx
+++ b/vcl/win/gdi/winlayout.cxx
@@ -3518,6 +3518,24 @@ bool D2DWriteTextOutRenderer::operator ()(SalLayout 
const &rLayout, HDC hDC,
     return (succeeded && nGlyphs >= 1 && pRectToErase);
 }
 
+IDWriteFontFace* D2DWriteTextOutRenderer::GetDWriteFontFace(HDC hDC) const
+{
+    IDWriteFontFace* pFontFace;
+    bool succeeded = false;
+    try
+    {
+        succeeded = SUCCEEDED(mpGdiInterop->CreateFontFaceFromHdc(hDC, 
&pFontFace));
+    }
+    catch (const std::exception& e)
+    {
+        SAL_WARN("vcl.gdi.opengl", "Error in dwrite while creating font face: 
" << e.what());
+        return nullptr;
+    }
+    if(succeeded)
+    return pFontFace;
+    else return nullptr;
+}
+
 bool D2DWriteTextOutRenderer::BindFont(HDC hDC)
 {
     // A TextOutRender can only be bound to one font at a time, so the
@@ -3884,7 +3902,7 @@ SalLayout* WinSalGraphics::GetTextLayout( ImplLayoutArgs& 
rArgs, int nFallbackLe
 
     if( getenv("SAL_USE_COMMON_LAYOUT") )
     {
-        return new CommonSalLayout( getHDC(), rFontInstance );
+        return new CommonSalLayout( this, rFontInstance, rFontFace );
     }
     else
     {
@@ -4047,6 +4065,9 @@ PhysicalFontFace* WinFontFace::Clone() const
     if ( mpGraphiteData )
         mpGraphiteData->AddReference();
 #endif
+    if( mpHBFace )
+        hb_face_reference( mpHBFace );
+
     PhysicalFontFace* pClone = new WinFontFace( *this );
     return pClone;
 }
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