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diff --git a/gfx/harfbuzz/src/hb-directwrite.cc b/gfx/harfbuzz/src/hb-directwrite.cc
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+/*
+ * Copyright © 2015-2019 Ebrahim Byagowi
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ */
+
+#include "hb.hh"
+
+#ifdef HAVE_DIRECTWRITE
+
+#include "hb-shaper-impl.hh"
+
+#include <dwrite_1.h>
+
+#include "hb-directwrite.h"
+
+#include "hb-ms-feature-ranges.hh"
+
+/**
+ * SECTION:hb-directwrite
+ * @title: hb-directwrite
+ * @short_description: DirectWrite integration
+ * @include: hb-directwrite.h
+ *
+ * Functions for using HarfBuzz with DirectWrite fonts.
+ **/
+
+/* Declare object creator for dynamic support of DWRITE */
+typedef HRESULT (WINAPI *t_DWriteCreateFactory)(
+ DWRITE_FACTORY_TYPE factoryType,
+ REFIID iid,
+ IUnknown **factory
+);
+
+
+/*
+ * DirectWrite font stream helpers
+ */
+
+// This is a font loader which provides only one font (unlike its original design).
+// For a better implementation which was also source of this
+// and DWriteFontFileStream, have a look at to NativeFontResourceDWrite.cpp in Mozilla
+class DWriteFontFileLoader : public IDWriteFontFileLoader
+{
+private:
+ IDWriteFontFileStream *mFontFileStream;
+public:
+ DWriteFontFileLoader (IDWriteFontFileStream *fontFileStream)
+ { mFontFileStream = fontFileStream; }
+
+ // IUnknown interface
+ IFACEMETHOD (QueryInterface) (IID const& iid, OUT void** ppObject)
+ { return S_OK; }
+ IFACEMETHOD_ (ULONG, AddRef) () { return 1; }
+ IFACEMETHOD_ (ULONG, Release) () { return 1; }
+
+ // IDWriteFontFileLoader methods
+ virtual HRESULT STDMETHODCALLTYPE
+ CreateStreamFromKey (void const* fontFileReferenceKey,
+ uint32_t fontFileReferenceKeySize,
+ OUT IDWriteFontFileStream** fontFileStream)
+ {
+ *fontFileStream = mFontFileStream;
+ return S_OK;
+ }
+
+ virtual ~DWriteFontFileLoader() {}
+};
+
+class DWriteFontFileStream : public IDWriteFontFileStream
+{
+private:
+ uint8_t *mData;
+ uint32_t mSize;
+public:
+ DWriteFontFileStream (uint8_t *aData, uint32_t aSize)
+ {
+ mData = aData;
+ mSize = aSize;
+ }
+
+ // IUnknown interface
+ IFACEMETHOD (QueryInterface) (IID const& iid, OUT void** ppObject)
+ { return S_OK; }
+ IFACEMETHOD_ (ULONG, AddRef) () { return 1; }
+ IFACEMETHOD_ (ULONG, Release) () { return 1; }
+
+ // IDWriteFontFileStream methods
+ virtual HRESULT STDMETHODCALLTYPE
+ ReadFileFragment (void const** fragmentStart,
+ UINT64 fileOffset,
+ UINT64 fragmentSize,
+ OUT void** fragmentContext)
+ {
+ // We are required to do bounds checking.
+ if (fileOffset + fragmentSize > mSize) return E_FAIL;
+
+ // truncate the 64 bit fileOffset to size_t sized index into mData
+ size_t index = static_cast<size_t> (fileOffset);
+
+ // We should be alive for the duration of this.
+ *fragmentStart = &mData[index];
+ *fragmentContext = nullptr;
+ return S_OK;
+ }
+
+ virtual void STDMETHODCALLTYPE
+ ReleaseFileFragment (void* fragmentContext) {}
+
+ virtual HRESULT STDMETHODCALLTYPE
+ GetFileSize (OUT UINT64* fileSize)
+ {
+ *fileSize = mSize;
+ return S_OK;
+ }
+
+ virtual HRESULT STDMETHODCALLTYPE
+ GetLastWriteTime (OUT UINT64* lastWriteTime) { return E_NOTIMPL; }
+
+ virtual ~DWriteFontFileStream() {}
+};
+
+
+/*
+* shaper face data
+*/
+
+struct hb_directwrite_face_data_t
+{
+ HMODULE dwrite_dll;
+ IDWriteFactory *dwriteFactory;
+ IDWriteFontFile *fontFile;
+ DWriteFontFileStream *fontFileStream;
+ DWriteFontFileLoader *fontFileLoader;
+ IDWriteFontFace *fontFace;
+ hb_blob_t *faceBlob;
+};
+
+hb_directwrite_face_data_t *
+_hb_directwrite_shaper_face_data_create (hb_face_t *face)
+{
+ hb_directwrite_face_data_t *data = new hb_directwrite_face_data_t;
+ if (unlikely (!data))
+ return nullptr;
+
+#define FAIL(...) \
+ HB_STMT_START { \
+ DEBUG_MSG (DIRECTWRITE, nullptr, __VA_ARGS__); \
+ return nullptr; \
+ } HB_STMT_END
+
+ data->dwrite_dll = LoadLibrary (TEXT ("DWRITE"));
+ if (unlikely (!data->dwrite_dll))
+ FAIL ("Cannot find DWrite.DLL");
+
+ t_DWriteCreateFactory p_DWriteCreateFactory;
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-function-type"
+#endif
+
+ p_DWriteCreateFactory = (t_DWriteCreateFactory)
+ GetProcAddress (data->dwrite_dll, "DWriteCreateFactory");
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+
+ if (unlikely (!p_DWriteCreateFactory))
+ FAIL ("Cannot find DWriteCreateFactory().");
+
+ HRESULT hr;
+
+ // TODO: factory and fontFileLoader should be cached separately
+ IDWriteFactory* dwriteFactory;
+ hr = p_DWriteCreateFactory (DWRITE_FACTORY_TYPE_SHARED, __uuidof (IDWriteFactory),
+ (IUnknown**) &dwriteFactory);
+
+ if (unlikely (hr != S_OK))
+ FAIL ("Failed to run DWriteCreateFactory().");
+
+ hb_blob_t *blob = hb_face_reference_blob (face);
+ DWriteFontFileStream *fontFileStream;
+ fontFileStream = new DWriteFontFileStream ((uint8_t *) hb_blob_get_data (blob, nullptr),
+ hb_blob_get_length (blob));
+
+ DWriteFontFileLoader *fontFileLoader = new DWriteFontFileLoader (fontFileStream);
+ dwriteFactory->RegisterFontFileLoader (fontFileLoader);
+
+ IDWriteFontFile *fontFile;
+ uint64_t fontFileKey = 0;
+ hr = dwriteFactory->CreateCustomFontFileReference (&fontFileKey, sizeof (fontFileKey),
+ fontFileLoader, &fontFile);
+
+ if (FAILED (hr))
+ FAIL ("Failed to load font file from data!");
+
+ BOOL isSupported;
+ DWRITE_FONT_FILE_TYPE fileType;
+ DWRITE_FONT_FACE_TYPE faceType;
+ uint32_t numberOfFaces;
+ hr = fontFile->Analyze (&isSupported, &fileType, &faceType, &numberOfFaces);
+ if (FAILED (hr) || !isSupported)
+ FAIL ("Font file is not supported.");
+
+#undef FAIL
+
+ IDWriteFontFace *fontFace;
+ dwriteFactory->CreateFontFace (faceType, 1, &fontFile, 0,
+ DWRITE_FONT_SIMULATIONS_NONE, &fontFace);
+
+ data->dwriteFactory = dwriteFactory;
+ data->fontFile = fontFile;
+ data->fontFileStream = fontFileStream;
+ data->fontFileLoader = fontFileLoader;
+ data->fontFace = fontFace;
+ data->faceBlob = blob;
+
+ return data;
+}
+
+void
+_hb_directwrite_shaper_face_data_destroy (hb_directwrite_face_data_t *data)
+{
+ if (data->fontFace)
+ data->fontFace->Release ();
+ if (data->fontFile)
+ data->fontFile->Release ();
+ if (data->dwriteFactory)
+ {
+ if (data->fontFileLoader)
+ data->dwriteFactory->UnregisterFontFileLoader (data->fontFileLoader);
+ data->dwriteFactory->Release ();
+ }
+ delete data->fontFileLoader;
+ delete data->fontFileStream;
+ hb_blob_destroy (data->faceBlob);
+ if (data->dwrite_dll)
+ FreeLibrary (data->dwrite_dll);
+ delete data;
+}
+
+
+/*
+ * shaper font data
+ */
+
+struct hb_directwrite_font_data_t {};
+
+hb_directwrite_font_data_t *
+_hb_directwrite_shaper_font_data_create (hb_font_t *font)
+{
+ return (hb_directwrite_font_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+
+void
+_hb_directwrite_shaper_font_data_destroy (hb_directwrite_font_data_t *data)
+{
+}
+
+
+// Most of TextAnalysis is originally written by Bas Schouten for Mozilla project
+// but now is relicensed to MIT for HarfBuzz use
+class TextAnalysis : public IDWriteTextAnalysisSource, public IDWriteTextAnalysisSink
+{
+public:
+
+ IFACEMETHOD (QueryInterface) (IID const& iid, OUT void** ppObject)
+ { return S_OK; }
+ IFACEMETHOD_ (ULONG, AddRef) () { return 1; }
+ IFACEMETHOD_ (ULONG, Release) () { return 1; }
+
+ // A single contiguous run of characters containing the same analysis
+ // results.
+ struct Run
+ {
+ uint32_t mTextStart; // starting text position of this run
+ uint32_t mTextLength; // number of contiguous code units covered
+ uint32_t mGlyphStart; // starting glyph in the glyphs array
+ uint32_t mGlyphCount; // number of glyphs associated with this run
+ // text
+ DWRITE_SCRIPT_ANALYSIS mScript;
+ uint8_t mBidiLevel;
+ bool mIsSideways;
+
+ bool ContainsTextPosition (uint32_t aTextPosition) const
+ {
+ return aTextPosition >= mTextStart &&
+ aTextPosition < mTextStart + mTextLength;
+ }
+
+ Run *nextRun;
+ };
+
+public:
+ TextAnalysis (const wchar_t* text, uint32_t textLength,
+ const wchar_t* localeName, DWRITE_READING_DIRECTION readingDirection)
+ : mTextLength (textLength), mText (text), mLocaleName (localeName),
+ mReadingDirection (readingDirection), mCurrentRun (nullptr) {}
+ ~TextAnalysis ()
+ {
+ // delete runs, except mRunHead which is part of the TextAnalysis object
+ for (Run *run = mRunHead.nextRun; run;)
+ {
+ Run *origRun = run;
+ run = run->nextRun;
+ delete origRun;
+ }
+ }
+
+ STDMETHODIMP
+ GenerateResults (IDWriteTextAnalyzer* textAnalyzer, Run **runHead)
+ {
+ // Analyzes the text using the script analyzer and returns
+ // the result as a series of runs.
+
+ HRESULT hr = S_OK;
+
+ // Initially start out with one result that covers the entire range.
+ // This result will be subdivided by the analysis processes.
+ mRunHead.mTextStart = 0;
+ mRunHead.mTextLength = mTextLength;
+ mRunHead.mBidiLevel =
+ (mReadingDirection == DWRITE_READING_DIRECTION_RIGHT_TO_LEFT);
+ mRunHead.nextRun = nullptr;
+ mCurrentRun = &mRunHead;
+
+ // Call each of the analyzers in sequence, recording their results.
+ if (SUCCEEDED (hr = textAnalyzer->AnalyzeScript (this, 0, mTextLength, this)))
+ *runHead = &mRunHead;
+
+ return hr;
+ }
+
+ // IDWriteTextAnalysisSource implementation
+
+ IFACEMETHODIMP
+ GetTextAtPosition (uint32_t textPosition,
+ OUT wchar_t const** textString,
+ OUT uint32_t* textLength)
+ {
+ if (textPosition >= mTextLength)
+ {
+ // No text at this position, valid query though.
+ *textString = nullptr;
+ *textLength = 0;
+ }
+ else
+ {
+ *textString = mText + textPosition;
+ *textLength = mTextLength - textPosition;
+ }
+ return S_OK;
+ }
+
+ IFACEMETHODIMP
+ GetTextBeforePosition (uint32_t textPosition,
+ OUT wchar_t const** textString,
+ OUT uint32_t* textLength)
+ {
+ if (textPosition == 0 || textPosition > mTextLength)
+ {
+ // Either there is no text before here (== 0), or this
+ // is an invalid position. The query is considered valid though.
+ *textString = nullptr;
+ *textLength = 0;
+ }
+ else
+ {
+ *textString = mText;
+ *textLength = textPosition;
+ }
+ return S_OK;
+ }
+
+ IFACEMETHODIMP_ (DWRITE_READING_DIRECTION)
+ GetParagraphReadingDirection () { return mReadingDirection; }
+
+ IFACEMETHODIMP GetLocaleName (uint32_t textPosition, uint32_t* textLength,
+ wchar_t const** localeName)
+ { return S_OK; }
+
+ IFACEMETHODIMP
+ GetNumberSubstitution (uint32_t textPosition,
+ OUT uint32_t* textLength,
+ OUT IDWriteNumberSubstitution** numberSubstitution)
+ {
+ // We do not support number substitution.
+ *numberSubstitution = nullptr;
+ *textLength = mTextLength - textPosition;
+
+ return S_OK;
+ }
+
+ // IDWriteTextAnalysisSink implementation
+
+ IFACEMETHODIMP
+ SetScriptAnalysis (uint32_t textPosition, uint32_t textLength,
+ DWRITE_SCRIPT_ANALYSIS const* scriptAnalysis)
+ {
+ SetCurrentRun (textPosition);
+ SplitCurrentRun (textPosition);
+ while (textLength > 0)
+ {
+ Run *run = FetchNextRun (&textLength);
+ run->mScript = *scriptAnalysis;
+ }
+
+ return S_OK;
+ }
+
+ IFACEMETHODIMP
+ SetLineBreakpoints (uint32_t textPosition,
+ uint32_t textLength,
+ const DWRITE_LINE_BREAKPOINT* lineBreakpoints)
+ { return S_OK; }
+
+ IFACEMETHODIMP SetBidiLevel (uint32_t textPosition, uint32_t textLength,
+ uint8_t explicitLevel, uint8_t resolvedLevel)
+ { return S_OK; }
+
+ IFACEMETHODIMP
+ SetNumberSubstitution (uint32_t textPosition, uint32_t textLength,
+ IDWriteNumberSubstitution* numberSubstitution)
+ { return S_OK; }
+
+protected:
+ Run *FetchNextRun (IN OUT uint32_t* textLength)
+ {
+ // Used by the sink setters, this returns a reference to the next run.
+ // Position and length are adjusted to now point after the current run
+ // being returned.
+
+ Run *origRun = mCurrentRun;
+ // Split the tail if needed (the length remaining is less than the
+ // current run's size).
+ if (*textLength < mCurrentRun->mTextLength)
+ SplitCurrentRun (mCurrentRun->mTextStart + *textLength);
+ else
+ // Just advance the current run.
+ mCurrentRun = mCurrentRun->nextRun;
+ *textLength -= origRun->mTextLength;
+
+ // Return a reference to the run that was just current.
+ return origRun;
+ }
+
+ void SetCurrentRun (uint32_t textPosition)
+ {
+ // Move the current run to the given position.
+ // Since the analyzers generally return results in a forward manner,
+ // this will usually just return early. If not, find the
+ // corresponding run for the text position.
+
+ if (mCurrentRun && mCurrentRun->ContainsTextPosition (textPosition))
+ return;
+
+ for (Run *run = &mRunHead; run; run = run->nextRun)
+ if (run->ContainsTextPosition (textPosition))
+ {
+ mCurrentRun = run;
+ return;
+ }
+ assert (0); // We should always be able to find the text position in one of our runs
+ }
+
+ void SplitCurrentRun (uint32_t splitPosition)
+ {
+ if (!mCurrentRun)
+ {
+ assert (0); // SplitCurrentRun called without current run
+ // Shouldn't be calling this when no current run is set!
+ return;
+ }
+ // Split the current run.
+ if (splitPosition <= mCurrentRun->mTextStart)
+ {
+ // No need to split, already the start of a run
+ // or before it. Usually the first.
+ return;
+ }
+ Run *newRun = new Run;
+
+ *newRun = *mCurrentRun;
+
+ // Insert the new run in our linked list.
+ newRun->nextRun = mCurrentRun->nextRun;
+ mCurrentRun->nextRun = newRun;
+
+ // Adjust runs' text positions and lengths.
+ uint32_t splitPoint = splitPosition - mCurrentRun->mTextStart;
+ newRun->mTextStart += splitPoint;
+ newRun->mTextLength -= splitPoint;
+ mCurrentRun->mTextLength = splitPoint;
+ mCurrentRun = newRun;
+ }
+
+protected:
+ // Input
+ // (weak references are fine here, since this class is a transient
+ // stack-based helper that doesn't need to copy data)
+ uint32_t mTextLength;
+ const wchar_t* mText;
+ const wchar_t* mLocaleName;
+ DWRITE_READING_DIRECTION mReadingDirection;
+
+ // Current processing state.
+ Run *mCurrentRun;
+
+ // Output is a list of runs starting here
+ Run mRunHead;
+};
+
+/*
+ * shaper
+ */
+
+hb_bool_t
+_hb_directwrite_shape (hb_shape_plan_t *shape_plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
+{
+ hb_face_t *face = font->face;
+ const hb_directwrite_face_data_t *face_data = face->data.directwrite;
+ 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