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