Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

third_party/harfbuzz-ng/src/hb-uniscribe.cc

Index: third_party/harfbuzz-ng/src/hb-uniscribe.cc
diff --git a/third_party/harfbuzz-ng/src/hb-uniscribe.cc b/third_party/harfbuzz-ng/src/hb-uniscribe.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ce86074ec88cdd8aeef4f80f869fe0aa011192d0
--- /dev/null
+++ b/third_party/harfbuzz-ng/src/hb-uniscribe.cc
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+/*
+ * Copyright © 2011  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 _WIN32_WINNT 0x0500
+
+#include "hb-private.hh"
+
+#include <windows.h>
+#include <usp10.h>
+
+typedef ULONG WIN_ULONG;
+
+#include "hb-uniscribe.h"
+
+#include "hb-ot-name-table.hh"
+#include "hb-ot-tag.h"
+
+#include "hb-font-private.hh"
+#include "hb-buffer-private.hh"
+
+
+
+#ifndef HB_DEBUG_UNISCRIBE
+#define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
+#endif
+
+
+/*
+DWORD GetFontData(
+  __in   HDC hdc,
+  __in   DWORD dwTable,
+  __in   DWORD dwOffset,
+  __out  LPVOID lpvBuffer,
+  __in   DWORD cbData
+);
+*/
+
+static bool
+populate_log_font (LOGFONTW  *lf,
+		   HDC        hdc,
+		   hb_font_t *font)
+{
+  memset (lf, 0, sizeof (*lf));
+  int dpi = GetDeviceCaps (hdc, LOGPIXELSY);
+  lf->lfHeight = -font->y_scale;
+
+  hb_blob_t *blob = Sanitizer<name>::sanitize (hb_face_reference_table (font->face, HB_TAG ('n','a','m','e')));
+  const name *name_table = Sanitizer<name>::lock_instance (blob);
+  unsigned int len = name_table->get_name (3, 1, 0x409, 4,
+					   lf->lfFaceName,
+					   sizeof (lf->lfFaceName[0]) * LF_FACESIZE)
+					  / sizeof (lf->lfFaceName[0]);
+  hb_blob_destroy (blob);
+
+  if (unlikely (!len)) {
+    DEBUG_MSG (UNISCRIBE, NULL, "Didn't find English name table entry");
+    return FALSE;
+  }
+  if (unlikely (len >= LF_FACESIZE)) {
+    DEBUG_MSG (UNISCRIBE, NULL, "Font name too long");
+    return FALSE;
+  }
+
+  for (unsigned int i = 0; i < len; i++)
+    lf->lfFaceName[i] = hb_be_uint16 (lf->lfFaceName[i]);
+  lf->lfFaceName[len] = 0;
+
+  return TRUE;
+}
+
+
+static hb_user_data_key_t hb_uniscribe_data_key;
+
+
+static struct hb_uniscribe_face_data_t {
+  HANDLE fh;
+} _hb_uniscribe_face_data_nil = {0};
+
+static void
+_hb_uniscribe_face_data_destroy (hb_uniscribe_face_data_t *data)
+{
+  if (data->fh)
+    RemoveFontMemResourceEx (data->fh);
+  free (data);
+}
+
+static hb_uniscribe_face_data_t *
+_hb_uniscribe_face_get_data (hb_face_t *face)
+{
+  hb_uniscribe_face_data_t *data = (hb_uniscribe_face_data_t *) hb_face_get_user_data (face, &hb_uniscribe_data_key);
+  if (likely (data)) return data;
+
+  data = (hb_uniscribe_face_data_t *) calloc (1, sizeof (hb_uniscribe_face_data_t));
+  if (unlikely (!data))
+    return &_hb_uniscribe_face_data_nil;
+
+
+  hb_blob_t *blob = hb_face_reference_blob (face);
+  unsigned int blob_length;
+  const char *blob_data = hb_blob_get_data (blob, &blob_length);
+  if (unlikely (!blob_length))
+    DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");
+
+  DWORD num_fonts_installed;
+  data->fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
+  hb_blob_destroy (blob);
+  if (unlikely (!data->fh))
+    DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
+
+
+  if (unlikely (!hb_face_set_user_data (face, &hb_uniscribe_data_key, data,
+					(hb_destroy_func_t) _hb_uniscribe_face_data_destroy,
+					FALSE)))
+  {
+    _hb_uniscribe_face_data_destroy (data);
+    data = (hb_uniscribe_face_data_t *) hb_face_get_user_data (face, &hb_uniscribe_data_key);
+    if (data)
+      return data;
+    else
+      return &_hb_uniscribe_face_data_nil;
+  }
+
+  return data;
+}
+
+
+static struct hb_uniscribe_font_data_t {
+  HDC hdc;
+  LOGFONTW log_font;
+  HFONT hfont;
+  SCRIPT_CACHE script_cache;
+} _hb_uniscribe_font_data_nil = {NULL, NULL, NULL};
+
+static void
+_hb_uniscribe_font_data_destroy (hb_uniscribe_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);
+}
+
+static hb_uniscribe_font_data_t *
+_hb_uniscribe_font_get_data (hb_font_t *font)
+{
+  hb_uniscribe_font_data_t *data = (hb_uniscribe_font_data_t *) hb_font_get_user_data (font, &hb_uniscribe_data_key);
+  if (likely (data)) return data;
+
+  data = (hb_uniscribe_font_data_t *) calloc (1, sizeof (hb_uniscribe_font_data_t));
+  if (unlikely (!data))
+    return &_hb_uniscribe_font_data_nil;
+
+  data->hdc = GetDC (NULL);
+
+  if (unlikely (!populate_log_font (&data->log_font, data->hdc, font)))
+    DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
+  else {
+    data->hfont = CreateFontIndirectW (&data->log_font);
+    if (unlikely (!data->hfont))
+      DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
+    if (!SelectObject (data->hdc, data->hfont))
+      DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
+  }
+
+  if (unlikely (!hb_font_set_user_data (font, &hb_uniscribe_data_key, data,
+					(hb_destroy_func_t) _hb_uniscribe_font_data_destroy,
+					FALSE)))
+  {
+    _hb_uniscribe_font_data_destroy (data);
+    data = (hb_uniscribe_font_data_t *) hb_font_get_user_data (font, &hb_uniscribe_data_key);
+    if (data)
+      return data;
+    else
+      return &_hb_uniscribe_font_data_nil;
+  }
+
+  return data;
+}
+
+LOGFONTW *
+hb_uniscribe_font_get_logfontw (hb_font_t *font)
+{
+  hb_uniscribe_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
+  if (unlikely (!font_data))
+    return NULL;
+  return &font_data->log_font;
+}
+
+HFONT
+hb_uniscribe_font_get_hfont (hb_font_t *font)
+{
+  hb_uniscribe_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
+  if (unlikely (!font_data))
+    return 0;
+  return font_data->hfont;
+}
+
+
+hb_bool_t
+hb_uniscribe_shape (hb_font_t          *font,
+		    hb_buffer_t        *buffer,
+		    const hb_feature_t *features,
+		    unsigned int        num_features,
+		    const char * const *shaper_options)
+{
+  buffer->guess_properties ();
+
+#define FAIL(...) \
+  HB_STMT_START { \
+    DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
+    return FALSE; \
+  } HB_STMT_END;
+
+  hb_uniscribe_face_data_t *face_data = _hb_uniscribe_face_get_data (font->face);
+  if (unlikely (!face_data->fh))
+    FAIL ("Couldn't get face data");
+
+  hb_uniscribe_font_data_t *font_data = _hb_uniscribe_font_get_data (font);
+  if (unlikely (!font_data->hfont))
+    FAIL ("Couldn't get font font");
+
+  if (unlikely (!buffer->len))
+    return TRUE;
+
+  HRESULT hr;
+
+retry:
+
+  unsigned int scratch_size;
+  char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
+
+  /* Allocate char buffers; they all fit */
+
+#define ALLOCATE_ARRAY(Type, name, len) \
+  Type *name = (Type *) scratch; \
+  scratch += len * sizeof (name[0]); \
+  scratch_size -= len * sizeof (name[0]);
+
+#define utf16_index() var1.u32
+
+  WCHAR *pchars = (WCHAR *) scratch;
+  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 < 0x10000))
+      pchars[chars_len++] = c;
+    else if (unlikely (c >= 0x110000))
+      pchars[chars_len++] = 0xFFFD;
+    else {
+      pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
+      pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
+    }
+  }
+
+  ALLOCATE_ARRAY (WCHAR, wchars, chars_len);
+  ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
+  ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len);
+
+  /* On Windows, we don't care about alignment...*/
+  unsigned int glyphs_size = scratch_size / (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);
+
+
+#define MAX_ITEMS 10
+
+  SCRIPT_ITEM items[MAX_ITEMS + 1];
+  SCRIPT_CONTROL bidi_control = {0};
+  SCRIPT_STATE bidi_state = {0};
+  WIN_ULONG script_tags[MAX_ITEMS];
+  int item_count;
+
+  /* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */
+  //bidi_control.fMergeNeutralItems = TRUE;
+  *(uint32_t*)&bidi_control |= 1<<24;
+
+  bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
+//  bidi_state.fOverrideDirection = 1;
+
+  hr = ScriptItemizeOpenType (wchars,
+			      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
+
+  int *range_char_counts = NULL;
+  TEXTRANGE_PROPERTIES **range_properties = NULL;
+  int range_count = 0;
+  if (num_features) {
+    /* TODO setup ranges */
+  }
+
+  OPENTYPE_TAG language_tag = hb_ot_tag_from_language (buffer->props.language);
+
+  unsigned int glyphs_offset = 0;
+  unsigned int glyphs_len;
+  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;
+      OPENTYPE_TAG script_tag = script_tags[i]; /* XXX buffer->props.script */
+
+      hr = ScriptShapeOpenType (font_data->hdc,
+				&font_data->script_cache,
+				&items[i].a,
+				script_tag,
+				language_tag,
+				range_char_counts,
+				range_properties,
+				range_count,
+				wchars + 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))
+      {
+        buffer->ensure (buffer->allocated * 2);
+	if (buffer->in_error)
+	  FAIL ("Buffer resize failed");
+	goto retry;
+      }
+      if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT))
+	FAIL ("ScriptShapeOpenType() failed: Font doesn't support script");
+      if (unlikely (FAILED (hr)))
+	FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
+
+      hr = ScriptPlaceOpenType (font_data->hdc,
+				&font_data->script_cache,
+				&items[i].a,
+				script_tag,
+				language_tag,
+				range_char_counts,
+				range_properties,
+				range_count,
+				wchars + 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);
+
+      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);
+  }
+  if (HB_DIRECTION_IS_FORWARD (buffer->props.direction)) {
+    for (unsigned int i = 1; i < glyphs_len; i++)
+      if (!glyph_props[i].sva.fClusterStart)
+	vis_clusters[i] = vis_clusters[i - 1];
+  } else {
+    for (int i = glyphs_len - 2; i >= 0; i--)
+      if (!glyph_props[i].sva.fClusterStart)
+	vis_clusters[i] = vis_clusters[i + 1];
+  }
+
+#undef utf16_index
+
+  buffer->ensure (glyphs_len);
+  if (buffer->in_error)
+    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.u32 = offsets[i].du;
+    info->var2.u32 = offsets[i].dv;
+  }
+
+  /* Set glyph positions */
+  buffer->clear_positions ();
+  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 = info->mask;
+    pos->x_offset = info->var1.u32;
+    pos->y_offset = info->var2.u32;
+  }
+
+  /* Wow, done! */
+  return TRUE;
+}
+
+