The Tor Browser: gfx/thebes/gfxDWriteCommon.h@b8a032363ba2 (annotated)

gfx/thebes/gfxDWriteCommon.h@b8a032363ba2 (annotated)

gfx/thebes/gfxDWriteCommon.h

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef GFX_DWRITECOMMON_H
 #define GFX_DWRITECOMMON_H
 // Mozilla includes
 #include "nscore.h"
 #include "nsIServiceManager.h"
 #include "nsCOMPtr.h"
 #include "nsAutoPtr.h"
 #include "cairo-features.h"
 #include "gfxFontConstants.h"
 #include "nsTArray.h"
 #include "gfxWindowsPlatform.h"
 #include "nsIUUIDGenerator.h"
 #include <windows.h>
 #include <dwrite.h>
 static DWRITE_FONT_STRETCH
 DWriteFontStretchFromStretch(int16_t aStretch)
 {
     switch (aStretch) {
         case NS_FONT_STRETCH_ULTRA_CONDENSED:
             return DWRITE_FONT_STRETCH_ULTRA_CONDENSED;
         case NS_FONT_STRETCH_EXTRA_CONDENSED:
             return DWRITE_FONT_STRETCH_EXTRA_CONDENSED;
         case NS_FONT_STRETCH_CONDENSED:
             return DWRITE_FONT_STRETCH_CONDENSED;
         case NS_FONT_STRETCH_SEMI_CONDENSED:
             return DWRITE_FONT_STRETCH_SEMI_CONDENSED;
         case NS_FONT_STRETCH_NORMAL:
             return DWRITE_FONT_STRETCH_NORMAL;
         case NS_FONT_STRETCH_SEMI_EXPANDED:
             return DWRITE_FONT_STRETCH_SEMI_EXPANDED;
         case NS_FONT_STRETCH_EXPANDED:
             return DWRITE_FONT_STRETCH_EXPANDED;
         case NS_FONT_STRETCH_EXTRA_EXPANDED:
             return DWRITE_FONT_STRETCH_EXTRA_EXPANDED;
         case NS_FONT_STRETCH_ULTRA_EXPANDED:
             return DWRITE_FONT_STRETCH_ULTRA_EXPANDED;
         default:
             return DWRITE_FONT_STRETCH_UNDEFINED;
     }
 }
 static int16_t
 FontStretchFromDWriteStretch(DWRITE_FONT_STRETCH aStretch)
 {
     switch (aStretch) {
         case DWRITE_FONT_STRETCH_ULTRA_CONDENSED:
             return NS_FONT_STRETCH_ULTRA_CONDENSED;
         case DWRITE_FONT_STRETCH_EXTRA_CONDENSED:
             return NS_FONT_STRETCH_EXTRA_CONDENSED;
         case DWRITE_FONT_STRETCH_CONDENSED:
             return NS_FONT_STRETCH_CONDENSED;
         case DWRITE_FONT_STRETCH_SEMI_CONDENSED:
             return NS_FONT_STRETCH_SEMI_CONDENSED;
         case DWRITE_FONT_STRETCH_NORMAL:
             return NS_FONT_STRETCH_NORMAL;
         case DWRITE_FONT_STRETCH_SEMI_EXPANDED:
             return NS_FONT_STRETCH_SEMI_EXPANDED;
         case DWRITE_FONT_STRETCH_EXPANDED:
             return NS_FONT_STRETCH_EXPANDED;
         case DWRITE_FONT_STRETCH_EXTRA_EXPANDED:
             return NS_FONT_STRETCH_EXTRA_EXPANDED;
         case DWRITE_FONT_STRETCH_ULTRA_EXPANDED:
             return NS_FONT_STRETCH_ULTRA_EXPANDED;
         default:
             return NS_FONT_STRETCH_NORMAL;
     }
 }
 struct ffReferenceKey
 {
     FallibleTArray<uint8_t> *mArray;
     nsID mGUID;
 };
 class gfxDWriteFontFileLoader : public IDWriteFontFileLoader
 {
 public:
     gfxDWriteFontFileLoader()
     {
     }
     // IUnknown interface
     IFACEMETHOD(QueryInterface)(IID const& iid, OUT void** ppObject)
     {
         if (iid == __uuidof(IDWriteFontFileLoader)) {
             *ppObject = static_cast<IDWriteFontFileLoader*>(this);
             return S_OK;
         } else if (iid == __uuidof(IUnknown)) {
             *ppObject = static_cast<IUnknown*>(this);
             return S_OK;
         } else {
             return E_NOINTERFACE;
         }
     }
     IFACEMETHOD_(ULONG, AddRef)()
     {
         return 1;
     }
     IFACEMETHOD_(ULONG, Release)()
     {
         return 1;
     }
     // IDWriteFontFileLoader methods
     /**
      * Important! Note the key here -has- to be a pointer to an
      * FallibleTArray<uint8_t>.
      */
     virtual HRESULT STDMETHODCALLTYPE
         CreateStreamFromKey(void const* fontFileReferenceKey,
                             UINT32 fontFileReferenceKeySize,
                             OUT IDWriteFontFileStream** fontFileStream);
     /**
      * Gets the singleton loader instance. Note that when using this font
      * loader, the key must be a pointer to an FallibleTArray<uint8_t>. This
      * array will be empty when the function returns.
      */
     static IDWriteFontFileLoader* Instance()
     {
         if (!mInstance) {
             mInstance = new gfxDWriteFontFileLoader();
             gfxWindowsPlatform::GetPlatform()->GetDWriteFactory()->
                 RegisterFontFileLoader(mInstance);
         }
         return mInstance;
     }
 private:
     static IDWriteFontFileLoader* mInstance;
 };
 class gfxDWriteFontFileStream MOZ_FINAL : public IDWriteFontFileStream
 {
 public:
     /**
      * Used by the FontFileLoader to create a new font stream,
      * this font stream is created from data in memory. The memory
      * passed may be released after object creation, it will be
      * copied internally.
      *
      * @param aData Font data
      */
     gfxDWriteFontFileStream(FallibleTArray<uint8_t> *aData);
     ~gfxDWriteFontFileStream();
     // IUnknown interface
     IFACEMETHOD(QueryInterface)(IID const& iid, OUT void** ppObject)
     {
         if (iid == __uuidof(IDWriteFontFileStream)) {
             *ppObject = static_cast<IDWriteFontFileStream*>(this);
             return S_OK;
         } else if (iid == __uuidof(IUnknown)) {
             *ppObject = static_cast<IUnknown*>(this);
             return S_OK;
         } else {
             return E_NOINTERFACE;
         }
     }
     IFACEMETHOD_(ULONG, AddRef)()
     {
         NS_PRECONDITION(int32_t(mRefCnt) >= 0, "illegal refcnt");
         ++mRefCnt;
         return mRefCnt;
     }
     IFACEMETHOD_(ULONG, Release)()
     {
         NS_PRECONDITION(0 != mRefCnt, "dup release");
         --mRefCnt;
         if (mRefCnt == 0) {
             delete this;
             return 0;
         }
         return mRefCnt;
     }
     // IDWriteFontFileStream methods
     virtual HRESULT STDMETHODCALLTYPE ReadFileFragment(void const** fragmentStart,
                                                        UINT64 fileOffset,
                                                        UINT64 fragmentSize,
                                                        OUT void** fragmentContext);
     virtual void STDMETHODCALLTYPE ReleaseFileFragment(void* fragmentContext);
     virtual HRESULT STDMETHODCALLTYPE GetFileSize(OUT UINT64* fileSize);
     virtual HRESULT STDMETHODCALLTYPE GetLastWriteTime(OUT UINT64* lastWriteTime);
 private:
     FallibleTArray<uint8_t> mData;
     nsAutoRefCnt mRefCnt;
 };
 #endif /* GFX_DWRITECOMMON_H */

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gfx/thebes/gfxDWriteCommon.h@b8a032363ba2 (annotated)

gfx/thebes/gfxDWriteCommon.h