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-rw-r--r--gfx/harfbuzz/src/hb-uniscribe.cc1036
1 files changed, 1036 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-uniscribe.cc b/gfx/harfbuzz/src/hb-uniscribe.cc
new file mode 100644
index 000000000..6e4db0149
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-uniscribe.cc
@@ -0,0 +1,1036 @@
+/*
+ * Copyright © 2011,2012,2013 Google, Inc.
+ *
+ * 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.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#define HB_SHAPER uniscribe
+#include "hb-shaper-impl-private.hh"
+
+#include <windows.h>
+#include <usp10.h>
+#include <rpc.h>
+
+#include "hb-uniscribe.h"
+
+#include "hb-open-file-private.hh"
+#include "hb-ot-name-table.hh"
+#include "hb-ot-tag.h"
+
+
+#ifndef HB_DEBUG_UNISCRIBE
+#define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
+#endif
+
+
+static inline uint16_t hb_uint16_swap (const uint16_t v)
+{ return (v >> 8) | (v << 8); }
+static inline uint32_t hb_uint32_swap (const uint32_t v)
+{ return (hb_uint16_swap (v) << 16) | hb_uint16_swap (v >> 16); }
+
+
+typedef HRESULT (WINAPI *SIOT) /*ScriptItemizeOpenType*/(
+ const WCHAR *pwcInChars,
+ int cInChars,
+ int cMaxItems,
+ const SCRIPT_CONTROL *psControl,
+ const SCRIPT_STATE *psState,
+ SCRIPT_ITEM *pItems,
+ OPENTYPE_TAG *pScriptTags,
+ int *pcItems
+);
+
+typedef HRESULT (WINAPI *SSOT) /*ScriptShapeOpenType*/(
+ HDC hdc,
+ SCRIPT_CACHE *psc,
+ SCRIPT_ANALYSIS *psa,
+ OPENTYPE_TAG tagScript,
+ OPENTYPE_TAG tagLangSys,
+ int *rcRangeChars,
+ TEXTRANGE_PROPERTIES **rpRangeProperties,
+ int cRanges,
+ const WCHAR *pwcChars,
+ int cChars,
+ int cMaxGlyphs,
+ WORD *pwLogClust,
+ SCRIPT_CHARPROP *pCharProps,
+ WORD *pwOutGlyphs,
+ SCRIPT_GLYPHPROP *pOutGlyphProps,
+ int *pcGlyphs
+);
+
+typedef HRESULT (WINAPI *SPOT) /*ScriptPlaceOpenType*/(
+ HDC hdc,
+ SCRIPT_CACHE *psc,
+ SCRIPT_ANALYSIS *psa,
+ OPENTYPE_TAG tagScript,
+ OPENTYPE_TAG tagLangSys,
+ int *rcRangeChars,
+ TEXTRANGE_PROPERTIES **rpRangeProperties,
+ int cRanges,
+ const WCHAR *pwcChars,
+ WORD *pwLogClust,
+ SCRIPT_CHARPROP *pCharProps,
+ int cChars,
+ const WORD *pwGlyphs,
+ const SCRIPT_GLYPHPROP *pGlyphProps,
+ int cGlyphs,
+ int *piAdvance,
+ GOFFSET *pGoffset,
+ ABC *pABC
+);
+
+
+/* Fallback implementations. */
+
+static HRESULT WINAPI
+hb_ScriptItemizeOpenType(
+ const WCHAR *pwcInChars,
+ int cInChars,
+ int cMaxItems,
+ const SCRIPT_CONTROL *psControl,
+ const SCRIPT_STATE *psState,
+ SCRIPT_ITEM *pItems,
+ OPENTYPE_TAG *pScriptTags,
+ int *pcItems
+)
+{
+{
+ return ScriptItemize (pwcInChars,
+ cInChars,
+ cMaxItems,
+ psControl,
+ psState,
+ pItems,
+ pcItems);
+}
+}
+
+static HRESULT WINAPI
+hb_ScriptShapeOpenType(
+ HDC hdc,
+ SCRIPT_CACHE *psc,
+ SCRIPT_ANALYSIS *psa,
+ OPENTYPE_TAG tagScript,
+ OPENTYPE_TAG tagLangSys,
+ int *rcRangeChars,
+ TEXTRANGE_PROPERTIES **rpRangeProperties,
+ int cRanges,
+ const WCHAR *pwcChars,
+ int cChars,
+ int cMaxGlyphs,
+ WORD *pwLogClust,
+ SCRIPT_CHARPROP *pCharProps,
+ WORD *pwOutGlyphs,
+ SCRIPT_GLYPHPROP *pOutGlyphProps,
+ int *pcGlyphs
+)
+{
+ SCRIPT_VISATTR *psva = (SCRIPT_VISATTR *) pOutGlyphProps;
+ return ScriptShape (hdc,
+ psc,
+ pwcChars,
+ cChars,
+ cMaxGlyphs,
+ psa,
+ pwOutGlyphs,
+ pwLogClust,
+ psva,
+ pcGlyphs);
+}
+
+static HRESULT WINAPI
+hb_ScriptPlaceOpenType(
+ HDC hdc,
+ SCRIPT_CACHE *psc,
+ SCRIPT_ANALYSIS *psa,
+ OPENTYPE_TAG tagScript,
+ OPENTYPE_TAG tagLangSys,
+ int *rcRangeChars,
+ TEXTRANGE_PROPERTIES **rpRangeProperties,
+ int cRanges,
+ const WCHAR *pwcChars,
+ WORD *pwLogClust,
+ SCRIPT_CHARPROP *pCharProps,
+ int cChars,
+ const WORD *pwGlyphs,
+ const SCRIPT_GLYPHPROP *pGlyphProps,
+ int cGlyphs,
+ int *piAdvance,
+ GOFFSET *pGoffset,
+ ABC *pABC
+)
+{
+ SCRIPT_VISATTR *psva = (SCRIPT_VISATTR *) pGlyphProps;
+ return ScriptPlace (hdc,
+ psc,
+ pwGlyphs,
+ cGlyphs,
+ psva,
+ psa,
+ piAdvance,
+ pGoffset,
+ pABC);
+}
+
+
+struct hb_uniscribe_shaper_funcs_t {
+ SIOT ScriptItemizeOpenType;
+ SSOT ScriptShapeOpenType;
+ SPOT ScriptPlaceOpenType;
+
+ inline void init (void)
+ {
+ HMODULE hinstLib;
+ this->ScriptItemizeOpenType = NULL;
+ this->ScriptShapeOpenType = NULL;
+ this->ScriptPlaceOpenType = NULL;
+
+ hinstLib = GetModuleHandle (TEXT ("usp10.dll"));
+ if (hinstLib)
+ {
+ this->ScriptItemizeOpenType = (SIOT) GetProcAddress (hinstLib, "ScriptItemizeOpenType");
+ this->ScriptShapeOpenType = (SSOT) GetProcAddress (hinstLib, "ScriptShapeOpenType");
+ this->ScriptPlaceOpenType = (SPOT) GetProcAddress (hinstLib, "ScriptPlaceOpenType");
+ }
+ if (!this->ScriptItemizeOpenType ||
+ !this->ScriptShapeOpenType ||
+ !this->ScriptPlaceOpenType)
+ {
+ DEBUG_MSG (UNISCRIBE, NULL, "OpenType versions of functions not found; falling back.");
+ this->ScriptItemizeOpenType = hb_ScriptItemizeOpenType;
+ this->ScriptShapeOpenType = hb_ScriptShapeOpenType;
+ this->ScriptPlaceOpenType = hb_ScriptPlaceOpenType;
+ }
+ }
+};
+static hb_uniscribe_shaper_funcs_t *uniscribe_funcs;
+
+static inline void
+free_uniscribe_funcs (void)
+{
+ free (uniscribe_funcs);
+}
+
+static hb_uniscribe_shaper_funcs_t *
+hb_uniscribe_shaper_get_funcs (void)
+{
+retry:
+ hb_uniscribe_shaper_funcs_t *funcs = (hb_uniscribe_shaper_funcs_t *) hb_atomic_ptr_get (&uniscribe_funcs);
+
+ if (unlikely (!funcs))
+ {
+ funcs = (hb_uniscribe_shaper_funcs_t *) calloc (1, sizeof (hb_uniscribe_shaper_funcs_t));
+ if (unlikely (!funcs))
+ return NULL;
+
+ funcs->init ();
+
+ if (!hb_atomic_ptr_cmpexch (&uniscribe_funcs, NULL, funcs)) {
+ free (funcs);
+ goto retry;
+ }
+
+#ifdef HB_USE_ATEXIT
+ atexit (free_uniscribe_funcs); /* First person registers atexit() callback. */
+#endif
+ }
+
+ return funcs;
+}
+
+
+struct active_feature_t {
+ OPENTYPE_FEATURE_RECORD rec;
+ unsigned int order;
+
+ static int cmp (const active_feature_t *a, const active_feature_t *b) {
+ return a->rec.tagFeature < b->rec.tagFeature ? -1 : a->rec.tagFeature > b->rec.tagFeature ? 1 :
+ a->order < b->order ? -1 : a->order > b->order ? 1 :
+ a->rec.lParameter < b->rec.lParameter ? -1 : a->rec.lParameter > b->rec.lParameter ? 1 :
+ 0;
+ }
+ bool operator== (const active_feature_t *f) {
+ return cmp (this, f) == 0;
+ }
+};
+
+struct feature_event_t {
+ unsigned int index;
+ bool start;
+ active_feature_t feature;
+
+ static int cmp (const feature_event_t *a, const feature_event_t *b) {
+ return a->index < b->index ? -1 : a->index > b->index ? 1 :
+ a->start < b->start ? -1 : a->start > b->start ? 1 :
+ active_feature_t::cmp (&a->feature, &b->feature);
+ }
+};
+
+struct range_record_t {
+ TEXTRANGE_PROPERTIES props;
+ unsigned int index_first; /* == start */
+ unsigned int index_last; /* == end - 1 */
+};
+
+HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, face)
+HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, font)
+
+
+/*
+ * shaper face data
+ */
+
+struct hb_uniscribe_shaper_face_data_t {
+ HANDLE fh;
+ hb_uniscribe_shaper_funcs_t *funcs;
+ wchar_t face_name[LF_FACESIZE];
+};
+
+/* face_name should point to a wchar_t[LF_FACESIZE] object. */
+static void
+_hb_generate_unique_face_name (wchar_t *face_name, unsigned int *plen)
+{
+ /* We'll create a private name for the font from a UUID using a simple,
+ * somewhat base64-like encoding scheme */
+ const char *enc = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-";
+ UUID id;
+ UuidCreate ((UUID*) &id);
+ ASSERT_STATIC (2 + 3 * (16/2) < LF_FACESIZE);
+ unsigned int name_str_len = 0;
+ face_name[name_str_len++] = 'F';
+ face_name[name_str_len++] = '_';
+ unsigned char *p = (unsigned char *) &id;
+ for (unsigned int i = 0; i < 16; i += 2)
+ {
+ /* Spread the 16 bits from two bytes of the UUID across three chars of face_name,
+ * using the bits in groups of 5,5,6 to select chars from enc.
+ * This will generate 24 characters; with the 'F_' prefix we already provided,
+ * the name will be 26 chars (plus the NUL terminator), so will always fit within
+ * face_name (LF_FACESIZE = 32). */
+ face_name[name_str_len++] = enc[p[i] >> 3];
+ face_name[name_str_len++] = enc[((p[i] << 2) | (p[i + 1] >> 6)) & 0x1f];
+ face_name[name_str_len++] = enc[p[i + 1] & 0x3f];
+ }
+ face_name[name_str_len] = 0;
+ if (plen)
+ *plen = name_str_len;
+}
+
+/* Destroys blob. */
+static hb_blob_t *
+_hb_rename_font (hb_blob_t *blob, wchar_t *new_name)
+{
+ /* Create a copy of the font data, with the 'name' table replaced by a
+ * table that names the font with our private F_* name created above.
+ * For simplicity, we just append a new 'name' table and update the
+ * sfnt directory; the original table is left in place, but unused.
+ *
+ * The new table will contain just 5 name IDs: family, style, unique,
+ * full, PS. All of them point to the same name data with our unique name.
+ */
+
+ blob = OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (blob);
+
+ unsigned int length, new_length, name_str_len;
+ const char *orig_sfnt_data = hb_blob_get_data (blob, &length);
+
+ _hb_generate_unique_face_name (new_name, &name_str_len);
+
+ static const uint16_t name_IDs[] = { 1, 2, 3, 4, 6 };
+
+ unsigned int name_table_length = OT::name::min_size +
+ ARRAY_LENGTH (name_IDs) * OT::NameRecord::static_size +
+ name_str_len * 2; /* for name data in UTF16BE form */
+ unsigned int name_table_offset = (length + 3) & ~3;
+
+ new_length = name_table_offset + ((name_table_length + 3) & ~3);
+ void *new_sfnt_data = calloc (1, new_length);
+ if (!new_sfnt_data)
+ {
+ hb_blob_destroy (blob);
+ return NULL;
+ }
+
+ memcpy(new_sfnt_data, orig_sfnt_data, length);
+
+ OT::name &name = OT::StructAtOffset<OT::name> (new_sfnt_data, name_table_offset);
+ name.format.set (0);
+ name.count.set (ARRAY_LENGTH (name_IDs));
+ name.stringOffset.set (name.get_size ());
+ for (unsigned int i = 0; i < ARRAY_LENGTH (name_IDs); i++)
+ {
+ OT::NameRecord &record = name.nameRecord[i];
+ record.platformID.set (3);
+ record.encodingID.set (1);
+ record.languageID.set (0x0409u); /* English */
+ record.nameID.set (name_IDs[i]);
+ record.length.set (name_str_len * 2);
+ record.offset.set (0);
+ }
+
+ /* Copy string data from new_name, converting wchar_t to UTF16BE. */
+ unsigned char *p = &OT::StructAfter<unsigned char> (name);
+ for (unsigned int i = 0; i < name_str_len; i++)
+ {
+ *p++ = new_name[i] >> 8;
+ *p++ = new_name[i] & 0xff;
+ }
+
+ /* Adjust name table entry to point to new name table */
+ const OT::OpenTypeFontFile &file = * (OT::OpenTypeFontFile *) (new_sfnt_data);
+ unsigned int face_count = file.get_face_count ();
+ for (unsigned int face_index = 0; face_index < face_count; face_index++)
+ {
+ /* Note: doing multiple edits (ie. TTC) can be unsafe. There may be
+ * toe-stepping. But we don't really care. */
+ const OT::OpenTypeFontFace &face = file.get_face (face_index);
+ unsigned int index;
+ if (face.find_table_index (HB_OT_TAG_name, &index))
+ {
+ OT::TableRecord &record = const_cast<OT::TableRecord &> (face.get_table (index));
+ record.checkSum.set_for_data (&name, name_table_length);
+ record.offset.set (name_table_offset);
+ record.length.set (name_table_length);
+ }
+ else if (face_index == 0) /* Fail if first face doesn't have 'name' table. */
+ {
+ free (new_sfnt_data);
+ hb_blob_destroy (blob);
+ return NULL;
+ }
+ }
+
+ /* The checkSumAdjustment field in the 'head' table is now wrong,
+ * but that doesn't actually seem to cause any problems so we don't
+ * bother. */
+
+ hb_blob_destroy (blob);
+ return hb_blob_create ((const char *) new_sfnt_data, new_length,
+ HB_MEMORY_MODE_WRITABLE, NULL, free);
+}
+
+hb_uniscribe_shaper_face_data_t *
+_hb_uniscribe_shaper_face_data_create (hb_face_t *face)
+{
+ hb_uniscribe_shaper_face_data_t *data = (hb_uniscribe_shaper_face_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_face_data_t));
+ if (unlikely (!data))
+ return NULL;
+
+ data->funcs = hb_uniscribe_shaper_get_funcs ();
+ if (unlikely (!data->funcs))
+ {
+ free (data);
+ return NULL;
+ }
+
+ hb_blob_t *blob = hb_face_reference_blob (face);
+ if (unlikely (!hb_blob_get_length (blob)))
+ DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");
+
+ blob = _hb_rename_font (blob, data->face_name);
+ if (unlikely (!blob))
+ {
+ free (data);
+ return NULL;
+ }
+
+ DWORD num_fonts_installed;
+ data->fh = AddFontMemResourceEx ((void *) hb_blob_get_data (blob, NULL),
+ hb_blob_get_length (blob),
+ 0, &num_fonts_installed);
+ if (unlikely (!data->fh))
+ {
+ DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
+ free (data);
+ return NULL;
+ }
+
+ return data;
+}
+
+void
+_hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_shaper_face_data_t *data)
+{
+ RemoveFontMemResourceEx (data->fh);
+ free (data);
+}
+
+
+/*
+ * shaper font data
+ */
+
+struct hb_uniscribe_shaper_font_data_t {
+ HDC hdc;
+ LOGFONTW log_font;
+ HFONT hfont;
+ SCRIPT_CACHE script_cache;
+ double x_mult, y_mult; /* From LOGFONT space to HB space. */
+};
+
+static bool
+populate_log_font (LOGFONTW *lf,
+ hb_font_t *font,
+ unsigned int font_size)
+{
+ memset (lf, 0, sizeof (*lf));
+ lf->lfHeight = -font_size;
+ lf->lfCharSet = DEFAULT_CHARSET;
+
+ hb_face_t *face = font->face;
+ hb_uniscribe_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
+
+ memcpy (lf->lfFaceName, face_data->face_name, sizeof (lf->lfFaceName));
+
+ return true;
+}
+
+hb_uniscribe_shaper_font_data_t *
+_hb_uniscribe_shaper_font_data_create (hb_font_t *font)
+{
+ if (unlikely (!hb_uniscribe_shaper_face_data_ensure (font->face))) return NULL;
+
+ hb_uniscribe_shaper_font_data_t *data = (hb_uniscribe_shaper_font_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_font_data_t));
+ if (unlikely (!data))
+ return NULL;
+
+ int font_size = font->face->get_upem (); /* Default... */
+ /* No idea if the following is even a good idea. */
+ if (font->y_ppem)
+ font_size = font->y_ppem;
+
+ if (font_size < 0)
+ font_size = -font_size;
+ data->x_mult = (double) font->x_scale / font_size;
+ data->y_mult = (double) font->y_scale / font_size;
+
+ data->hdc = GetDC (NULL);
+
+ if (unlikely (!populate_log_font (&data->log_font, font, font_size))) {
+ DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
+ _hb_uniscribe_shaper_font_data_destroy (data);
+ return NULL;
+ }
+
+ data->hfont = CreateFontIndirectW (&data->log_font);
+ if (unlikely (!data->hfont)) {
+ DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
+ _hb_uniscribe_shaper_font_data_destroy (data);
+ return NULL;
+ }
+
+ if (!SelectObject (data->hdc, data->hfont)) {
+ DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
+ _hb_uniscribe_shaper_font_data_destroy (data);
+ return NULL;
+ }
+
+ return data;
+}
+
+void
+_hb_uniscribe_shaper_font_data_destroy (hb_uniscribe_shaper_font_data_t *data)
+{
+ if (data->hdc)
+ ReleaseDC (NULL, data->hdc);
+ if (data->hfont)
+ DeleteObject (data->hfont);
+ if (data->script_cache)
+ ScriptFreeCache (&data->script_cache);
+ free (data);
+}
+
+LOGFONTW *
+hb_uniscribe_font_get_logfontw (hb_font_t *font)
+{
+ if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
+ hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
+ return &font_data->log_font;
+}
+
+HFONT
+hb_uniscribe_font_get_hfont (hb_font_t *font)
+{
+ if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
+ hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
+ return font_data->hfont;
+}
+
+
+/*
+ * shaper shape_plan data
+ */
+
+struct hb_uniscribe_shaper_shape_plan_data_t {};
+
+hb_uniscribe_shaper_shape_plan_data_t *
+_hb_uniscribe_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
+ const hb_feature_t *user_features HB_UNUSED,
+ unsigned int num_user_features HB_UNUSED,
+ const int *coords HB_UNUSED,
+ unsigned int num_coords HB_UNUSED)
+{
+ return (hb_uniscribe_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
+}
+
+void
+_hb_uniscribe_shaper_shape_plan_data_destroy (hb_uniscribe_shaper_shape_plan_data_t *data HB_UNUSED)
+{
+}
+
+
+/*
+ * shaper
+ */
+
+
+hb_bool_t
+_hb_uniscribe_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;
+ hb_uniscribe_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
+ hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
+ hb_uniscribe_shaper_funcs_t *funcs = face_data->funcs;
+
+ /*
+ * Set up features.
+ */
+ hb_auto_array_t<OPENTYPE_FEATURE_RECORD> feature_records;
+ hb_auto_array_t<range_record_t> range_records;
+ if (num_features)
+ {
+ /* Sort features by start/end events. */
+ hb_auto_array_t<feature_event_t> feature_events;
+ for (unsigned int i = 0; i < num_features; i++)
+ {
+ active_feature_t feature;
+ feature.rec.tagFeature = hb_uint32_swap (features[i].tag);
+ feature.rec.lParameter = features[i].value;
+ feature.order = i;
+
+ feature_event_t *event;
+
+ event = feature_events.push ();
+ if (unlikely (!event))
+ goto fail_features;
+ event->index = features[i].start;
+ event->start = true;
+ event->feature = feature;
+
+ event = feature_events.push ();
+ if (unlikely (!event))
+ goto fail_features;
+ event->index = features[i].end;
+ event->start = false;
+ event->feature = feature;
+ }
+ feature_events.qsort ();
+ /* Add a strategic final event. */
+ {
+ active_feature_t feature;
+ feature.rec.tagFeature = 0;
+ feature.rec.lParameter = 0;
+ feature.order = num_features + 1;
+
+ feature_event_t *event = feature_events.push ();
+ if (unlikely (!event))
+ goto fail_features;
+ event->index = 0; /* This value does magic. */
+ event->start = false;
+ event->feature = feature;
+ }
+
+ /* Scan events and save features for each range. */
+ hb_auto_array_t<active_feature_t> active_features;
+ unsigned int last_index = 0;
+ for (unsigned int i = 0; i < feature_events.len; i++)
+ {
+ feature_event_t *event = &feature_events[i];
+
+ if (event->index != last_index)
+ {
+ /* Save a snapshot of active features and the range. */
+ range_record_t *range = range_records.push ();
+ if (unlikely (!range))
+ goto fail_features;
+
+ unsigned int offset = feature_records.len;
+
+ active_features.qsort ();
+ for (unsigned int j = 0; j < active_features.len; j++)
+ {
+ if (!j || active_features[j].rec.tagFeature != feature_records[feature_records.len - 1].tagFeature)
+ {
+ OPENTYPE_FEATURE_RECORD *feature = feature_records.push ();
+ if (unlikely (!feature))
+ goto fail_features;
+ *feature = active_features[j].rec;
+ }
+ else
+ {
+ /* Overrides value for existing feature. */
+ feature_records[feature_records.len - 1].lParameter = active_features[j].rec.lParameter;
+ }
+ }
+
+ /* Will convert to pointer after all is ready, since feature_records.array
+ * may move as we grow it. */
+ range->props.potfRecords = reinterpret_cast<OPENTYPE_FEATURE_RECORD *> (offset);
+ range->props.cotfRecords = feature_records.len - offset;
+ range->index_first = last_index;
+ range->index_last = event->index - 1;
+
+ last_index = event->index;
+ }
+
+ if (event->start) {
+ active_feature_t *feature = active_features.push ();
+ if (unlikely (!feature))
+ goto fail_features;
+ *feature = event->feature;
+ } else {
+ active_feature_t *feature = active_features.find (&event->feature);
+ if (feature)
+ active_features.remove (feature - active_features.array);
+ }
+ }
+
+ if (!range_records.len) /* No active feature found. */
+ goto fail_features;
+
+ /* Fixup the pointers. */
+ for (unsigned int i = 0; i < range_records.len; i++)
+ {
+ range_record_t *range = &range_records[i];
+ range->props.potfRecords = feature_records.array + reinterpret_cast<uintptr_t> (range->props.potfRecords);
+ }
+ }
+ else
+ {
+ fail_features:
+ num_features = 0;
+ }
+
+#define FAIL(...) \
+ HB_STMT_START { \
+ DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
+ return false; \
+ } HB_STMT_END;
+
+ HRESULT hr;
+
+retry:
+
+ 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; \
+ { \
+ unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \
+ assert (_consumed <= scratch_size); \
+ scratch += _consumed; \
+ scratch_size -= _consumed; \
+ }
+
+#define utf16_index() var1.u32
+
+ ALLOCATE_ARRAY (WCHAR, pchars, 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))
+ pchars[chars_len++] = c;
+ else if (unlikely (c > 0x10FFFFu))
+ pchars[chars_len++] = 0xFFFDu;
+ else {
+ pchars[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10);
+ pchars[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1u << 10) - 1));
+ }
+ }
+
+ ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
+ ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len);
+
+ if (num_features)
+ {
+ /* 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. */
+ }
+ }
+
+ /* 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 (SCRIPT_GLYPHPROP) +
+ sizeof (int) +
+ sizeof (GOFFSET) +
+ sizeof (uint32_t));
+
+ ALLOCATE_ARRAY (WORD, glyphs, glyphs_size);
+ ALLOCATE_ARRAY (SCRIPT_GLYPHPROP, glyph_props, glyphs_size);
+ ALLOCATE_ARRAY (int, advances, glyphs_size);
+ ALLOCATE_ARRAY (GOFFSET, offsets, glyphs_size);
+ ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);
+
+ /* Note:
+ * We can't touch the contents of glyph_props. Our fallback
+ * implementations of Shape and Place functions use that buffer
+ * by casting it to a different type. It works because they
+ * both agree about it, but if we want to access it here we
+ * need address that issue first.
+ */
+
+#undef ALLOCATE_ARRAY
+
+#define MAX_ITEMS 256
+
+ SCRIPT_ITEM items[MAX_ITEMS + 1];
+ SCRIPT_CONTROL bidi_control = {0};
+ SCRIPT_STATE bidi_state = {0};
+ ULONG script_tags[MAX_ITEMS];
+ int item_count;
+
+ /* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */
+ //bidi_control.fMergeNeutralItems = true;
+ *(uint32_t*)&bidi_control |= 1u<<24;
+
+ bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
+ bidi_state.fOverrideDirection = 1;
+
+ hr = funcs->ScriptItemizeOpenType (pchars,
+ chars_len,
+ MAX_ITEMS,
+ &bidi_control,
+ &bidi_state,
+ items,
+ script_tags,
+ &item_count);
+ if (unlikely (FAILED (hr)))
+ FAIL ("ScriptItemizeOpenType() failed: 0x%08xL", hr);
+
+#undef MAX_ITEMS
+
+ OPENTYPE_TAG language_tag = hb_uint32_swap (hb_ot_tag_from_language (buffer->props.language));
+ hb_auto_array_t<TEXTRANGE_PROPERTIES*> range_properties;
+ hb_auto_array_t<int> range_char_counts;
+
+ unsigned int glyphs_offset = 0;
+ unsigned int glyphs_len;
+ bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
+ for (unsigned int i = 0; i < item_count; i++)
+ {
+ unsigned int chars_offset = items[i].iCharPos;
+ unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;
+
+ if (num_features)
+ {
+ range_properties.shrink (0);
+ range_char_counts.shrink (0);
+
+ range_record_t *last_range = &range_records[0];
+
+ for (unsigned int k = chars_offset; k < chars_offset + item_chars_len; k++)
+ {
+ range_record_t *range = last_range;
+ while (log_clusters[k] < range->index_first)
+ range--;
+ while (log_clusters[k] > range->index_last)
+ range++;
+ if (!range_properties.len ||
+ &range->props != range_properties[range_properties.len - 1])
+ {
+ TEXTRANGE_PROPERTIES **props = range_properties.push ();
+ int *c = range_char_counts.push ();
+ if (unlikely (!props || !c))
+ {
+ range_properties.shrink (0);
+ range_char_counts.shrink (0);
+ break;
+ }
+ *props = &range->props;
+ *c = 1;
+ }
+ else
+ {
+ range_char_counts[range_char_counts.len - 1]++;
+ }
+
+ last_range = range;
+ }
+ }
+
+ /* Asking for glyphs in logical order circumvents at least
+ * one bug in Uniscribe. */
+ items[i].a.fLogicalOrder = true;
+
+ retry_shape:
+ hr = funcs->ScriptShapeOpenType (font_data->hdc,
+ &font_data->script_cache,
+ &items[i].a,
+ script_tags[i],
+ language_tag,
+ range_char_counts.array,
+ range_properties.array,
+ range_properties.len,
+ pchars + chars_offset,
+ item_chars_len,
+ glyphs_size - glyphs_offset,
+ /* out */
+ log_clusters + chars_offset,
+ char_props + chars_offset,
+ glyphs + glyphs_offset,
+ glyph_props + glyphs_offset,
+ (int *) &glyphs_len);
+
+ if (unlikely (items[i].a.fNoGlyphIndex))
+ FAIL ("ScriptShapeOpenType() set fNoGlyphIndex");
+ if (unlikely (hr == E_OUTOFMEMORY || hr == E_NOT_SUFFICIENT_BUFFER))
+ {
+ if (unlikely (!buffer->ensure (buffer->allocated * 2)))
+ FAIL ("Buffer resize failed");
+ goto retry;
+ }
+ if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT))
+ {
+ if (items[i].a.eScript == SCRIPT_UNDEFINED)
+ FAIL ("ScriptShapeOpenType() failed: Font doesn't support script");
+ items[i].a.eScript = SCRIPT_UNDEFINED;
+ goto retry_shape;
+ }
+ if (unlikely (FAILED (hr)))
+ {
+ FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
+ }
+
+ for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++)
+ log_clusters[j] += glyphs_offset;
+
+ hr = funcs->ScriptPlaceOpenType (font_data->hdc,
+ &font_data->script_cache,
+ &items[i].a,
+ script_tags[i],
+ language_tag,
+ range_char_counts.array,
+ range_properties.array,
+ range_properties.len,
+ pchars + chars_offset,
+ log_clusters + chars_offset,
+ char_props + chars_offset,
+ item_chars_len,
+ glyphs + glyphs_offset,
+ glyph_props + glyphs_offset,
+ glyphs_len,
+ /* out */
+ advances + glyphs_offset,
+ offsets + glyphs_offset,
+ NULL);
+ if (unlikely (FAILED (hr)))
+ FAIL ("ScriptPlaceOpenType() failed: 0x%08xL", hr);
+
+ if (DEBUG_ENABLED (UNISCRIBE))
+ fprintf (stderr, "Item %d RTL %d LayoutRTL %d LogicalOrder %d ScriptTag %c%c%c%c\n",
+ i,
+ items[i].a.fRTL,
+ items[i].a.fLayoutRTL,
+ items[i].a.fLogicalOrder,
+ HB_UNTAG (hb_uint32_swap (script_tags[i])));
+
+ glyphs_offset += glyphs_len;
+ }
+ glyphs_len = glyphs_offset;
+
+ /* 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 < glyphs_len; i++)
+ vis_clusters[i] = -1;
+ for (unsigned int i = 0; i < buffer->len; i++) {
+ uint32_t *p = &vis_clusters[log_clusters[buffer->info[i].utf16_index()]];
+ *p = MIN (*p, buffer->info[i].cluster);
+ }
+ for (unsigned int i = 1; i < glyphs_len; i++)
+ if (vis_clusters[i] == -1)
+ vis_clusters[i] = vis_clusters[i - 1];
+
+#undef utf16_index
+
+ if (unlikely (!buffer->ensure (glyphs_len)))
+ FAIL ("Buffer in error");
+
+#undef FAIL
+
+ /* Set glyph infos */
+ buffer->len = 0;
+ for (unsigned int i = 0; i < glyphs_len; i++)
+ {
+ hb_glyph_info_t *info = &buffer->info[buffer->len++];
+
+ info->codepoint = glyphs[i];
+ info->cluster = vis_clusters[i];
+
+ /* The rest is crap. Let's store position info there for now. */
+ info->mask = advances[i];
+ info->var1.i32 = offsets[i].du;
+ info->var2.i32 = offsets[i].dv;
+ }
+
+ /* Set glyph positions */
+ buffer->clear_positions ();
+ double x_mult = font_data->x_mult, y_mult = font_data->y_mult;
+ for (unsigned int i = 0; i < glyphs_len; 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 * (backward ? -info->var1.i32 : info->var1.i32);
+ pos->y_offset = y_mult * info->var2.i32;
+ }
+
+ if (backward)
+ hb_buffer_reverse (buffer);
+
+ /* Wow, done! */
+ return true;
+}
+
+