884 lines
25 KiB
C++
884 lines
25 KiB
C++
/*
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* Copyright © 2015-2019 Ebrahim Byagowi
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#include "hb.hh"
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#ifdef HAVE_DIRECTWRITE
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#include "hb-shaper-impl.hh"
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#include <dwrite_1.h>
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#include "hb-directwrite.h"
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#include "hb-ms-feature-ranges.hh"
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/**
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* SECTION:hb-directwrite
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* @title: hb-directwrite
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* @short_description: DirectWrite integration
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* @include: hb-directwrite.h
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*
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* Functions for using HarfBuzz with DirectWrite fonts.
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**/
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/* Declare object creator for dynamic support of DWRITE */
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typedef HRESULT (WINAPI *t_DWriteCreateFactory)(
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DWRITE_FACTORY_TYPE factoryType,
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REFIID iid,
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IUnknown **factory
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);
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/*
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* DirectWrite font stream helpers
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*/
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// This is a font loader which provides only one font (unlike its original design).
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// For a better implementation which was also source of this
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// and DWriteFontFileStream, have a look at to NativeFontResourceDWrite.cpp in Mozilla
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class DWriteFontFileLoader : public IDWriteFontFileLoader
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{
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private:
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IDWriteFontFileStream *mFontFileStream;
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public:
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DWriteFontFileLoader (IDWriteFontFileStream *fontFileStream)
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{ mFontFileStream = fontFileStream; }
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// IUnknown interface
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IFACEMETHOD (QueryInterface) (IID const& iid, OUT void** ppObject)
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{ return S_OK; }
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IFACEMETHOD_ (ULONG, AddRef) () { return 1; }
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IFACEMETHOD_ (ULONG, Release) () { return 1; }
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// IDWriteFontFileLoader methods
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virtual HRESULT STDMETHODCALLTYPE
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CreateStreamFromKey (void const* fontFileReferenceKey,
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uint32_t fontFileReferenceKeySize,
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OUT IDWriteFontFileStream** fontFileStream)
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{
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*fontFileStream = mFontFileStream;
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return S_OK;
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}
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virtual ~DWriteFontFileLoader() {}
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};
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class DWriteFontFileStream : public IDWriteFontFileStream
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{
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private:
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uint8_t *mData;
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uint32_t mSize;
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public:
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DWriteFontFileStream (uint8_t *aData, uint32_t aSize)
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{
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mData = aData;
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mSize = aSize;
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}
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// IUnknown interface
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IFACEMETHOD (QueryInterface) (IID const& iid, OUT void** ppObject)
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{ return S_OK; }
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IFACEMETHOD_ (ULONG, AddRef) () { return 1; }
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IFACEMETHOD_ (ULONG, Release) () { return 1; }
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// IDWriteFontFileStream methods
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virtual HRESULT STDMETHODCALLTYPE
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ReadFileFragment (void const** fragmentStart,
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UINT64 fileOffset,
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UINT64 fragmentSize,
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OUT void** fragmentContext)
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{
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// We are required to do bounds checking.
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if (fileOffset + fragmentSize > mSize) return E_FAIL;
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// truncate the 64 bit fileOffset to size_t sized index into mData
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size_t index = static_cast<size_t> (fileOffset);
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// We should be alive for the duration of this.
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*fragmentStart = &mData[index];
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*fragmentContext = nullptr;
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return S_OK;
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}
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virtual void STDMETHODCALLTYPE
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ReleaseFileFragment (void* fragmentContext) {}
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virtual HRESULT STDMETHODCALLTYPE
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GetFileSize (OUT UINT64* fileSize)
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{
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*fileSize = mSize;
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE
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GetLastWriteTime (OUT UINT64* lastWriteTime) { return E_NOTIMPL; }
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virtual ~DWriteFontFileStream() {}
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};
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/*
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* shaper face data
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*/
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struct hb_directwrite_face_data_t
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{
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HMODULE dwrite_dll;
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IDWriteFactory *dwriteFactory;
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IDWriteFontFile *fontFile;
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DWriteFontFileStream *fontFileStream;
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DWriteFontFileLoader *fontFileLoader;
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IDWriteFontFace *fontFace;
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hb_blob_t *faceBlob;
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};
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hb_directwrite_face_data_t *
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_hb_directwrite_shaper_face_data_create (hb_face_t *face)
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{
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hb_directwrite_face_data_t *data = new hb_directwrite_face_data_t;
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if (unlikely (!data))
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return nullptr;
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#define FAIL(...) \
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HB_STMT_START { \
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DEBUG_MSG (DIRECTWRITE, nullptr, __VA_ARGS__); \
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return nullptr; \
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} HB_STMT_END
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data->dwrite_dll = LoadLibrary (TEXT ("DWRITE"));
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if (unlikely (!data->dwrite_dll))
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FAIL ("Cannot find DWrite.DLL");
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t_DWriteCreateFactory p_DWriteCreateFactory;
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#if defined(__GNUC__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wcast-function-type"
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#endif
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p_DWriteCreateFactory = (t_DWriteCreateFactory)
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GetProcAddress (data->dwrite_dll, "DWriteCreateFactory");
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#if defined(__GNUC__)
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#pragma GCC diagnostic pop
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#endif
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if (unlikely (!p_DWriteCreateFactory))
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FAIL ("Cannot find DWriteCreateFactory().");
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HRESULT hr;
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// TODO: factory and fontFileLoader should be cached separately
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IDWriteFactory* dwriteFactory;
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hr = p_DWriteCreateFactory (DWRITE_FACTORY_TYPE_SHARED, __uuidof (IDWriteFactory),
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(IUnknown**) &dwriteFactory);
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if (unlikely (hr != S_OK))
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FAIL ("Failed to run DWriteCreateFactory().");
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hb_blob_t *blob = hb_face_reference_blob (face);
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DWriteFontFileStream *fontFileStream;
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fontFileStream = new DWriteFontFileStream ((uint8_t *) hb_blob_get_data (blob, nullptr),
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hb_blob_get_length (blob));
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DWriteFontFileLoader *fontFileLoader = new DWriteFontFileLoader (fontFileStream);
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dwriteFactory->RegisterFontFileLoader (fontFileLoader);
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IDWriteFontFile *fontFile;
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uint64_t fontFileKey = 0;
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hr = dwriteFactory->CreateCustomFontFileReference (&fontFileKey, sizeof (fontFileKey),
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fontFileLoader, &fontFile);
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if (FAILED (hr))
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FAIL ("Failed to load font file from data!");
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BOOL isSupported;
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DWRITE_FONT_FILE_TYPE fileType;
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DWRITE_FONT_FACE_TYPE faceType;
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uint32_t numberOfFaces;
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hr = fontFile->Analyze (&isSupported, &fileType, &faceType, &numberOfFaces);
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if (FAILED (hr) || !isSupported)
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FAIL ("Font file is not supported.");
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#undef FAIL
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IDWriteFontFace *fontFace;
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dwriteFactory->CreateFontFace (faceType, 1, &fontFile, 0,
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DWRITE_FONT_SIMULATIONS_NONE, &fontFace);
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data->dwriteFactory = dwriteFactory;
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data->fontFile = fontFile;
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data->fontFileStream = fontFileStream;
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data->fontFileLoader = fontFileLoader;
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data->fontFace = fontFace;
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data->faceBlob = blob;
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return data;
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}
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void
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_hb_directwrite_shaper_face_data_destroy (hb_directwrite_face_data_t *data)
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{
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if (data->fontFace)
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data->fontFace->Release ();
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if (data->fontFile)
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data->fontFile->Release ();
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if (data->dwriteFactory)
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{
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if (data->fontFileLoader)
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data->dwriteFactory->UnregisterFontFileLoader (data->fontFileLoader);
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data->dwriteFactory->Release ();
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}
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delete data->fontFileLoader;
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delete data->fontFileStream;
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hb_blob_destroy (data->faceBlob);
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if (data->dwrite_dll)
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FreeLibrary (data->dwrite_dll);
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delete data;
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}
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/*
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* shaper font data
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*/
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struct hb_directwrite_font_data_t {};
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hb_directwrite_font_data_t *
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_hb_directwrite_shaper_font_data_create (hb_font_t *font)
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{
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return (hb_directwrite_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
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}
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void
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_hb_directwrite_shaper_font_data_destroy (hb_directwrite_font_data_t *data)
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{
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}
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// Most of TextAnalysis is originally written by Bas Schouten for Mozilla project
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// but now is relicensed to MIT for HarfBuzz use
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class TextAnalysis : public IDWriteTextAnalysisSource, public IDWriteTextAnalysisSink
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{
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public:
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IFACEMETHOD (QueryInterface) (IID const& iid, OUT void** ppObject)
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{ return S_OK; }
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IFACEMETHOD_ (ULONG, AddRef) () { return 1; }
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IFACEMETHOD_ (ULONG, Release) () { return 1; }
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// A single contiguous run of characters containing the same analysis
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// results.
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struct Run
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{
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uint32_t mTextStart; // starting text position of this run
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uint32_t mTextLength; // number of contiguous code units covered
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uint32_t mGlyphStart; // starting glyph in the glyphs array
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uint32_t mGlyphCount; // number of glyphs associated with this run
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// text
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DWRITE_SCRIPT_ANALYSIS mScript;
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uint8_t mBidiLevel;
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bool mIsSideways;
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bool ContainsTextPosition (uint32_t aTextPosition) const
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{
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return aTextPosition >= mTextStart &&
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aTextPosition < mTextStart + mTextLength;
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}
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Run *nextRun;
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};
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public:
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TextAnalysis (const wchar_t* text, uint32_t textLength,
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const wchar_t* localeName, DWRITE_READING_DIRECTION readingDirection)
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: mTextLength (textLength), mText (text), mLocaleName (localeName),
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mReadingDirection (readingDirection), mCurrentRun (nullptr) {}
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~TextAnalysis ()
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{
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// delete runs, except mRunHead which is part of the TextAnalysis object
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for (Run *run = mRunHead.nextRun; run;)
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{
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Run *origRun = run;
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run = run->nextRun;
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delete origRun;
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}
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}
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STDMETHODIMP
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GenerateResults (IDWriteTextAnalyzer* textAnalyzer, Run **runHead)
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{
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// Analyzes the text using the script analyzer and returns
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// the result as a series of runs.
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HRESULT hr = S_OK;
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// Initially start out with one result that covers the entire range.
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// This result will be subdivided by the analysis processes.
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mRunHead.mTextStart = 0;
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mRunHead.mTextLength = mTextLength;
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mRunHead.mBidiLevel =
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(mReadingDirection == DWRITE_READING_DIRECTION_RIGHT_TO_LEFT);
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mRunHead.nextRun = nullptr;
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mCurrentRun = &mRunHead;
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// Call each of the analyzers in sequence, recording their results.
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if (SUCCEEDED (hr = textAnalyzer->AnalyzeScript (this, 0, mTextLength, this)))
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*runHead = &mRunHead;
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return hr;
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}
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// IDWriteTextAnalysisSource implementation
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IFACEMETHODIMP
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GetTextAtPosition (uint32_t textPosition,
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OUT wchar_t const** textString,
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OUT uint32_t* textLength)
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{
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if (textPosition >= mTextLength)
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{
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// No text at this position, valid query though.
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*textString = nullptr;
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*textLength = 0;
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}
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else
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{
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*textString = mText + textPosition;
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*textLength = mTextLength - textPosition;
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}
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return S_OK;
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}
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IFACEMETHODIMP
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GetTextBeforePosition (uint32_t textPosition,
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OUT wchar_t const** textString,
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OUT uint32_t* textLength)
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{
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if (textPosition == 0 || textPosition > mTextLength)
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{
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// Either there is no text before here (== 0), or this
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// is an invalid position. The query is considered valid though.
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*textString = nullptr;
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*textLength = 0;
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}
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else
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{
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*textString = mText;
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*textLength = textPosition;
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}
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return S_OK;
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}
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IFACEMETHODIMP_ (DWRITE_READING_DIRECTION)
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GetParagraphReadingDirection () { return mReadingDirection; }
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IFACEMETHODIMP GetLocaleName (uint32_t textPosition, uint32_t* textLength,
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wchar_t const** localeName)
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{ return S_OK; }
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IFACEMETHODIMP
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GetNumberSubstitution (uint32_t textPosition,
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OUT uint32_t* textLength,
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OUT IDWriteNumberSubstitution** numberSubstitution)
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{
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// We do not support number substitution.
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*numberSubstitution = nullptr;
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*textLength = mTextLength - textPosition;
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return S_OK;
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}
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// IDWriteTextAnalysisSink implementation
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IFACEMETHODIMP
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SetScriptAnalysis (uint32_t textPosition, uint32_t textLength,
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DWRITE_SCRIPT_ANALYSIS const* scriptAnalysis)
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{
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SetCurrentRun (textPosition);
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SplitCurrentRun (textPosition);
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while (textLength > 0)
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{
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Run *run = FetchNextRun (&textLength);
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run->mScript = *scriptAnalysis;
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}
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return S_OK;
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}
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IFACEMETHODIMP
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SetLineBreakpoints (uint32_t textPosition,
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uint32_t textLength,
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const DWRITE_LINE_BREAKPOINT* lineBreakpoints)
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{ return S_OK; }
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IFACEMETHODIMP SetBidiLevel (uint32_t textPosition, uint32_t textLength,
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uint8_t explicitLevel, uint8_t resolvedLevel)
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{ return S_OK; }
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IFACEMETHODIMP
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SetNumberSubstitution (uint32_t textPosition, uint32_t textLength,
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IDWriteNumberSubstitution* numberSubstitution)
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{ return S_OK; }
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protected:
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Run *FetchNextRun (IN OUT uint32_t* textLength)
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{
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// Used by the sink setters, this returns a reference to the next run.
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// Position and length are adjusted to now point after the current run
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// being returned.
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Run *origRun = mCurrentRun;
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// Split the tail if needed (the length remaining is less than the
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// current run's size).
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if (*textLength < mCurrentRun->mTextLength)
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SplitCurrentRun (mCurrentRun->mTextStart + *textLength);
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else
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// Just advance the current run.
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mCurrentRun = mCurrentRun->nextRun;
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*textLength -= origRun->mTextLength;
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// Return a reference to the run that was just current.
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return origRun;
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}
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void SetCurrentRun (uint32_t textPosition)
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{
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// Move the current run to the given position.
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// Since the analyzers generally return results in a forward manner,
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// this will usually just return early. If not, find the
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// corresponding run for the text position.
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if (mCurrentRun && mCurrentRun->ContainsTextPosition (textPosition))
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return;
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for (Run *run = &mRunHead; run; run = run->nextRun)
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if (run->ContainsTextPosition (textPosition))
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{
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mCurrentRun = run;
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return;
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}
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assert (0); // We should always be able to find the text position in one of our runs
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}
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void SplitCurrentRun (uint32_t splitPosition)
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{
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if (!mCurrentRun)
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{
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assert (0); // SplitCurrentRun called without current run
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// Shouldn't be calling this when no current run is set!
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return;
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}
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// Split the current run.
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if (splitPosition <= mCurrentRun->mTextStart)
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{
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// No need to split, already the start of a run
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// or before it. Usually the first.
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return;
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}
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Run *newRun = new Run;
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*newRun = *mCurrentRun;
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// Insert the new run in our linked list.
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newRun->nextRun = mCurrentRun->nextRun;
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mCurrentRun->nextRun = newRun;
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// Adjust runs' text positions and lengths.
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uint32_t splitPoint = splitPosition - mCurrentRun->mTextStart;
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newRun->mTextStart += splitPoint;
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newRun->mTextLength -= splitPoint;
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mCurrentRun->mTextLength = splitPoint;
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mCurrentRun = newRun;
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}
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protected:
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// Input
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// (weak references are fine here, since this class is a transient
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// stack-based helper that doesn't need to copy data)
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uint32_t mTextLength;
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const wchar_t* mText;
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const wchar_t* mLocaleName;
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DWRITE_READING_DIRECTION mReadingDirection;
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// Current processing state.
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Run *mCurrentRun;
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// Output is a list of runs starting here
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Run mRunHead;
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};
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/*
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* shaper
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*/
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hb_bool_t
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_hb_directwrite_shape (hb_shape_plan_t *shape_plan,
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hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features)
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{
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hb_face_t *face = font->face;
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const hb_directwrite_face_data_t *face_data = face->data.directwrite;
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|
IDWriteFactory *dwriteFactory = face_data->dwriteFactory;
|
|
IDWriteFontFace *fontFace = face_data->fontFace;
|
|
|
|
IDWriteTextAnalyzer* analyzer;
|
|
dwriteFactory->CreateTextAnalyzer (&analyzer);
|
|
|
|
unsigned int scratch_size;
|
|
hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size);
|
|
#define ALLOCATE_ARRAY(Type, name, len) \
|
|
Type *name = (Type *) scratch; \
|
|
do { \
|
|
unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \
|
|
assert (_consumed <= scratch_size); \
|
|
scratch += _consumed; \
|
|
scratch_size -= _consumed; \
|
|
} while (0)
|
|
|
|
#define utf16_index() var1.u32
|
|
|
|
ALLOCATE_ARRAY (wchar_t, textString, buffer->len * 2);
|
|
|
|
unsigned int chars_len = 0;
|
|
for (unsigned int i = 0; i < buffer->len; i++)
|
|
{
|
|
hb_codepoint_t c = buffer->info[i].codepoint;
|
|
buffer->info[i].utf16_index () = chars_len;
|
|
if (likely (c <= 0xFFFFu))
|
|
textString[chars_len++] = c;
|
|
else if (unlikely (c > 0x10FFFFu))
|
|
textString[chars_len++] = 0xFFFDu;
|
|
else
|
|
{
|
|
textString[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10);
|
|
textString[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1u << 10) - 1));
|
|
}
|
|
}
|
|
|
|
ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
|
|
/* Need log_clusters to assign features. */
|
|
chars_len = 0;
|
|
for (unsigned int i = 0; i < buffer->len; i++)
|
|
{
|
|
hb_codepoint_t c = buffer->info[i].codepoint;
|
|
unsigned int cluster = buffer->info[i].cluster;
|
|
log_clusters[chars_len++] = cluster;
|
|
if (hb_in_range (c, 0x10000u, 0x10FFFFu))
|
|
log_clusters[chars_len++] = cluster; /* Surrogates. */
|
|
}
|
|
|
|
DWRITE_READING_DIRECTION readingDirection;
|
|
readingDirection = buffer->props.direction ?
|
|
DWRITE_READING_DIRECTION_RIGHT_TO_LEFT :
|
|
DWRITE_READING_DIRECTION_LEFT_TO_RIGHT;
|
|
|
|
/*
|
|
* There's an internal 16-bit limit on some things inside the analyzer,
|
|
* but we never attempt to shape a word longer than 64K characters
|
|
* in a single gfxShapedWord, so we cannot exceed that limit.
|
|
*/
|
|
uint32_t textLength = chars_len;
|
|
|
|
TextAnalysis analysis (textString, textLength, nullptr, readingDirection);
|
|
TextAnalysis::Run *runHead;
|
|
HRESULT hr;
|
|
hr = analysis.GenerateResults (analyzer, &runHead);
|
|
|
|
#define FAIL(...) \
|
|
HB_STMT_START { \
|
|
DEBUG_MSG (DIRECTWRITE, nullptr, __VA_ARGS__); \
|
|
return false; \
|
|
} HB_STMT_END
|
|
|
|
if (FAILED (hr))
|
|
FAIL ("Analyzer failed to generate results.");
|
|
|
|
uint32_t maxGlyphCount = 3 * textLength / 2 + 16;
|
|
uint32_t glyphCount;
|
|
bool isRightToLeft = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
|
|
|
|
const wchar_t localeName[20] = {0};
|
|
if (buffer->props.language)
|
|
mbstowcs ((wchar_t*) localeName,
|
|
hb_language_to_string (buffer->props.language), 20);
|
|
|
|
/*
|
|
* Set up features.
|
|
*/
|
|
static_assert ((sizeof (DWRITE_TYPOGRAPHIC_FEATURES) == sizeof (hb_ms_features_t)), "");
|
|
static_assert ((sizeof (DWRITE_FONT_FEATURE) == sizeof (hb_ms_feature_t)), "");
|
|
hb_vector_t<hb_ms_features_t *> range_features;
|
|
hb_vector_t<uint32_t> range_char_counts;
|
|
if (num_features)
|
|
{
|
|
hb_vector_t<hb_ms_feature_t> feature_records;
|
|
hb_vector_t<hb_ms_range_record_t> range_records;
|
|
if (hb_ms_setup_features (features, num_features, feature_records, range_records))
|
|
hb_ms_make_feature_ranges (feature_records,
|
|
range_records,
|
|
0,
|
|
chars_len,
|
|
log_clusters,
|
|
range_features,
|
|
range_char_counts);
|
|
}
|
|
|
|
uint16_t* clusterMap;
|
|
clusterMap = new uint16_t[textLength];
|
|
DWRITE_SHAPING_TEXT_PROPERTIES* textProperties;
|
|
textProperties = new DWRITE_SHAPING_TEXT_PROPERTIES[textLength];
|
|
|
|
retry_getglyphs:
|
|
uint16_t* glyphIndices = new uint16_t[maxGlyphCount];
|
|
DWRITE_SHAPING_GLYPH_PROPERTIES* glyphProperties;
|
|
glyphProperties = new DWRITE_SHAPING_GLYPH_PROPERTIES[maxGlyphCount];
|
|
|
|
hr = analyzer->GetGlyphs (textString,
|
|
chars_len,
|
|
fontFace,
|
|
false,
|
|
isRightToLeft,
|
|
&runHead->mScript,
|
|
localeName,
|
|
nullptr,
|
|
(const DWRITE_TYPOGRAPHIC_FEATURES**) range_features.arrayZ,
|
|
range_char_counts.arrayZ,
|
|
range_features.length,
|
|
maxGlyphCount,
|
|
clusterMap,
|
|
textProperties,
|
|
glyphIndices,
|
|
glyphProperties,
|
|
&glyphCount);
|
|
|
|
if (unlikely (hr == HRESULT_FROM_WIN32 (ERROR_INSUFFICIENT_BUFFER)))
|
|
{
|
|
delete [] glyphIndices;
|
|
delete [] glyphProperties;
|
|
|
|
maxGlyphCount *= 2;
|
|
|
|
goto retry_getglyphs;
|
|
}
|
|
if (FAILED (hr))
|
|
FAIL ("Analyzer failed to get glyphs.");
|
|
|
|
float* glyphAdvances = new float[maxGlyphCount];
|
|
DWRITE_GLYPH_OFFSET* glyphOffsets = new DWRITE_GLYPH_OFFSET[maxGlyphCount];
|
|
|
|
/* The -2 in the following is to compensate for possible
|
|
* alignment needed after the WORD array. sizeof (WORD) == 2. */
|
|
unsigned int glyphs_size = (scratch_size * sizeof (int) - 2)
|
|
/ (sizeof (WORD) +
|
|
sizeof (DWRITE_SHAPING_GLYPH_PROPERTIES) +
|
|
sizeof (int) +
|
|
sizeof (DWRITE_GLYPH_OFFSET) +
|
|
sizeof (uint32_t));
|
|
ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);
|
|
|
|
#undef ALLOCATE_ARRAY
|
|
|
|
int fontEmSize = font->face->get_upem ();
|
|
if (fontEmSize < 0) fontEmSize = -fontEmSize;
|
|
|
|
if (fontEmSize < 0) fontEmSize = -fontEmSize;
|
|
double x_mult = (double) font->x_scale / fontEmSize;
|
|
double y_mult = (double) font->y_scale / fontEmSize;
|
|
|
|
hr = analyzer->GetGlyphPlacements (textString,
|
|
clusterMap,
|
|
textProperties,
|
|
chars_len,
|
|
glyphIndices,
|
|
glyphProperties,
|
|
glyphCount,
|
|
fontFace,
|
|
fontEmSize,
|
|
false,
|
|
isRightToLeft,
|
|
&runHead->mScript,
|
|
localeName,
|
|
(const DWRITE_TYPOGRAPHIC_FEATURES**) range_features.arrayZ,
|
|
range_char_counts.arrayZ,
|
|
range_features.length,
|
|
glyphAdvances,
|
|
glyphOffsets);
|
|
|
|
if (FAILED (hr))
|
|
FAIL ("Analyzer failed to get glyph placements.");
|
|
|
|
/* Ok, we've got everything we need, now compose output buffer,
|
|
* very, *very*, carefully! */
|
|
|
|
/* Calculate visual-clusters. That's what we ship. */
|
|
for (unsigned int i = 0; i < glyphCount; i++)
|
|
vis_clusters[i] = (uint32_t) -1;
|
|
for (unsigned int i = 0; i < buffer->len; i++)
|
|
{
|
|
uint32_t *p =
|
|
&vis_clusters[log_clusters[buffer->info[i].utf16_index ()]];
|
|
*p = hb_min (*p, buffer->info[i].cluster);
|
|
}
|
|
for (unsigned int i = 1; i < glyphCount; i++)
|
|
if (vis_clusters[i] == (uint32_t) -1)
|
|
vis_clusters[i] = vis_clusters[i - 1];
|
|
|
|
#undef utf16_index
|
|
|
|
if (unlikely (!buffer->ensure (glyphCount)))
|
|
FAIL ("Buffer in error");
|
|
|
|
#undef FAIL
|
|
|
|
/* Set glyph infos */
|
|
buffer->len = 0;
|
|
for (unsigned int i = 0; i < glyphCount; i++)
|
|
{
|
|
hb_glyph_info_t *info = &buffer->info[buffer->len++];
|
|
|
|
info->codepoint = glyphIndices[i];
|
|
info->cluster = vis_clusters[i];
|
|
|
|
/* The rest is crap. Let's store position info there for now. */
|
|
info->mask = glyphAdvances[i];
|
|
info->var1.i32 = glyphOffsets[i].advanceOffset;
|
|
info->var2.i32 = glyphOffsets[i].ascenderOffset;
|
|
}
|
|
|
|
/* Set glyph positions */
|
|
buffer->clear_positions ();
|
|
for (unsigned int i = 0; i < glyphCount; i++)
|
|
{
|
|
hb_glyph_info_t *info = &buffer->info[i];
|
|
hb_glyph_position_t *pos = &buffer->pos[i];
|
|
|
|
/* TODO vertical */
|
|
pos->x_advance = x_mult * (int32_t) info->mask;
|
|
pos->x_offset = x_mult * (isRightToLeft ? -info->var1.i32 : info->var1.i32);
|
|
pos->y_offset = y_mult * info->var2.i32;
|
|
}
|
|
|
|
if (isRightToLeft) hb_buffer_reverse (buffer);
|
|
|
|
buffer->clear_glyph_flags ();
|
|
buffer->unsafe_to_break ();
|
|
|
|
delete [] clusterMap;
|
|
delete [] glyphIndices;
|
|
delete [] textProperties;
|
|
delete [] glyphProperties;
|
|
delete [] glyphAdvances;
|
|
delete [] glyphOffsets;
|
|
|
|
/* Wow, done! */
|
|
return true;
|
|
}
|
|
|
|
struct _hb_directwrite_font_table_context {
|
|
IDWriteFontFace *face;
|
|
void *table_context;
|
|
};
|
|
|
|
static void
|
|
_hb_directwrite_table_data_release (void *data)
|
|
{
|
|
_hb_directwrite_font_table_context *context = (_hb_directwrite_font_table_context *) data;
|
|
context->face->ReleaseFontTable (context->table_context);
|
|
hb_free (context);
|
|
}
|
|
|
|
static hb_blob_t *
|
|
_hb_directwrite_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
|
|
{
|
|
IDWriteFontFace *dw_face = ((IDWriteFontFace *) user_data);
|
|
const void *data;
|
|
uint32_t length;
|
|
void *table_context;
|
|
BOOL exists;
|
|
if (!dw_face || FAILED (dw_face->TryGetFontTable (hb_uint32_swap (tag), &data,
|
|
&length, &table_context, &exists)))
|
|
return nullptr;
|
|
|
|
if (!data || !exists || !length)
|
|
{
|
|
dw_face->ReleaseFontTable (table_context);
|
|
return nullptr;
|
|
}
|
|
|
|
_hb_directwrite_font_table_context *context = (_hb_directwrite_font_table_context *) hb_malloc (sizeof (_hb_directwrite_font_table_context));
|
|
context->face = dw_face;
|
|
context->table_context = table_context;
|
|
|
|
return hb_blob_create ((const char *) data, length, HB_MEMORY_MODE_READONLY,
|
|
context, _hb_directwrite_table_data_release);
|
|
}
|
|
|
|
static void
|
|
_hb_directwrite_font_release (void *data)
|
|
{
|
|
if (data)
|
|
((IDWriteFontFace *) data)->Release ();
|
|
}
|
|
|
|
/**
|
|
* hb_directwrite_face_create:
|
|
* @font_face: a DirectWrite IDWriteFontFace object.
|
|
*
|
|
* Constructs a new face object from the specified DirectWrite IDWriteFontFace.
|
|
*
|
|
* Return value: #hb_face_t object corresponding to the given input
|
|
*
|
|
* Since: 2.4.0
|
|
**/
|
|
hb_face_t *
|
|
hb_directwrite_face_create (IDWriteFontFace *font_face)
|
|
{
|
|
if (font_face)
|
|
font_face->AddRef ();
|
|
return hb_face_create_for_tables (_hb_directwrite_reference_table, font_face,
|
|
_hb_directwrite_font_release);
|
|
}
|
|
|
|
/**
|
|
* hb_directwrite_face_get_font_face:
|
|
* @face: a #hb_face_t object
|
|
*
|
|
* Gets the DirectWrite IDWriteFontFace associated with @face.
|
|
*
|
|
* Return value: DirectWrite IDWriteFontFace object corresponding to the given input
|
|
*
|
|
* Since: 2.5.0
|
|
**/
|
|
IDWriteFontFace *
|
|
hb_directwrite_face_get_font_face (hb_face_t *face)
|
|
{
|
|
return face->data.directwrite->fontFace;
|
|
}
|
|
|
|
|
|
#endif
|