Initial import from the monolithic Qt.

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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 383 insertions, 0 deletions

diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-buffer.c b/src/3rdparty/harfbuzz/src/harfbuzz-buffer.c
new file mode 100644
index 0000000000..4d4c16717f
--- /dev/null
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-buffer.c
@@ -0,0 +1,383 @@
+/*
+ * Copyright (C) 1998-2004  David Turner and Werner Lemberg
+ * Copyright (C) 2004,2007  Red Hat, Inc.
+ *
+ * This is part of HarfBuzz, an OpenType Layout engine 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.
+ *
+ * Red Hat Author(s): Owen Taylor, Behdad Esfahbod
+ */
+
+#include "harfbuzz-impl.h"
+#include "harfbuzz-buffer-private.h"
+#include "harfbuzz-gsub-private.h"
+#include "harfbuzz-gpos-private.h"
+
+/* Here is how the buffer works internally:
+ *
+ * There are two string pointers: in_string and out_string.  They
+ * always have same allocated size, but different length and positions.
+ *
+ * As an optimization, both in_string and out_string may point to the
+ * same piece of memory, which is owned by in_string.  This remains the
+ * case as long as:
+ *
+ *   - copy_glyph() is called
+ *   - replace_glyph() is called with inplace=TRUE
+ *   - add_output_glyph() and add_output_glyphs() are not called
+ *
+ * In that case swap(), and copy_glyph(), and replace_glyph() are all
+ * mostly no-op.
+ *
+ * As soon an add_output_glyph[s]() or replace_glyph() with inplace=FALSE is
+ * called, out_string is moved over to an alternate buffer (alt_string), and
+ * its current contents (out_length entries) are copied to the alt buffer.
+ * This should all remain transparent to the user.  swap() then switches
+ * in_string and alt_string.  alt_string is not allocated until its needed,
+ * but after that it's grown with in_string unconditionally.
+ *
+ * The buffer->separate_out boolean keeps status of whether out_string points
+ * to in_string (FALSE) or alt_string (TRUE).
+ */
+
+/* Internal API */
+
+static HB_Error
+hb_buffer_ensure( HB_Buffer buffer,
+		   HB_UInt   size )
+{
+  HB_UInt new_allocated = buffer->allocated;
+
+  if (size > new_allocated)
+    {
+      HB_Error error;
+
+      while (size > new_allocated)
+	new_allocated += (new_allocated >> 1) + 8;
+      
+      if ( buffer->positions )
+        {
+	  if ( REALLOC_ARRAY( buffer->positions, new_allocated, HB_PositionRec ) )
+	    return error;
+	}
+
+      if ( REALLOC_ARRAY( buffer->in_string, new_allocated, HB_GlyphItemRec ) )
+	return error;
+
+      if ( buffer->separate_out )
+        {
+	  if ( REALLOC_ARRAY( buffer->alt_string, new_allocated, HB_GlyphItemRec ) )
+	    return error;
+
+	  buffer->out_string = buffer->alt_string;
+	}
+      else
+        {
+	  buffer->out_string = buffer->in_string;
+
+	  if ( buffer->alt_string )
+	    {
+	      if ( REALLOC_ARRAY( buffer->alt_string, new_allocated, HB_GlyphItemRec ) )
+		return error;
+	    }
+	}
+
+      buffer->allocated = new_allocated;
+    }
+
+  return HB_Err_Ok;
+}
+
+static HB_Error
+hb_buffer_duplicate_out_buffer( HB_Buffer buffer )
+{
+  if ( !buffer->alt_string )
+    {
+      HB_Error error;
+
+      if ( ALLOC_ARRAY( buffer->alt_string, buffer->allocated, HB_GlyphItemRec ) )
+	return error;
+    }
+
+  buffer->out_string = buffer->alt_string;
+  memcpy( buffer->out_string, buffer->in_string, buffer->out_length * sizeof (buffer->out_string[0]) );
+  buffer->separate_out = TRUE;
+
+  return HB_Err_Ok;
+}
+
+/* Public API */
+
+HB_Error
+hb_buffer_new( HB_Buffer *pbuffer )
+{
+  HB_Buffer buffer;
+  HB_Error error;
+
+  if ( ALLOC( buffer, sizeof( HB_BufferRec ) ) )
+    return error;
+
+  buffer->allocated = 0;
+  buffer->in_string = NULL;
+  buffer->alt_string = NULL;
+  buffer->positions = NULL;
+
+  hb_buffer_clear( buffer );
+
+  *pbuffer = buffer;
+
+  return HB_Err_Ok;
+}
+
+void
+hb_buffer_free( HB_Buffer buffer )
+{
+  FREE( buffer->in_string );
+  FREE( buffer->alt_string );
+  buffer->out_string = NULL;
+  FREE( buffer->positions );
+  FREE( buffer );
+}
+
+void
+hb_buffer_clear( HB_Buffer buffer )
+{
+  buffer->in_length = 0;
+  buffer->out_length = 0;
+  buffer->in_pos = 0;
+  buffer->out_pos = 0;
+  buffer->out_string = buffer->in_string;
+  buffer->separate_out = FALSE;
+  buffer->max_ligID = 0;
+}
+
+HB_Error
+hb_buffer_add_glyph( HB_Buffer buffer,
+		      HB_UInt   glyph_index,
+		      HB_UInt   properties,
+		      HB_UInt   cluster )
+{
+  HB_Error error;
+  HB_GlyphItem glyph;
+  
+  error = hb_buffer_ensure( buffer, buffer->in_length + 1 );
+  if ( error )
+    return error;
+
+  glyph = &buffer->in_string[buffer->in_length];
+  glyph->gindex = glyph_index;
+  glyph->properties = properties;
+  glyph->cluster = cluster;
+  glyph->component = 0;
+  glyph->ligID = 0;
+  glyph->gproperties = HB_GLYPH_PROPERTIES_UNKNOWN;
+  
+  buffer->in_length++;
+
+  return HB_Err_Ok;
+}
+
+/* HarfBuzz-Internal API */
+
+HB_INTERNAL void
+_hb_buffer_clear_output( HB_Buffer buffer )
+{
+  buffer->out_length = 0;
+  buffer->out_pos = 0;
+  buffer->out_string = buffer->in_string;
+  buffer->separate_out = FALSE;
+}
+
+HB_INTERNAL HB_Error
+_hb_buffer_clear_positions( HB_Buffer buffer )
+{
+  if ( !buffer->positions )
+    {
+      HB_Error error;
+
+      if ( ALLOC_ARRAY( buffer->positions, buffer->allocated, HB_PositionRec ) )
+	return error;
+    }
+
+  memset (buffer->positions, 0, sizeof (buffer->positions[0]) * buffer->in_length);
+
+  return HB_Err_Ok;
+}
+
+HB_INTERNAL void
+_hb_buffer_swap( HB_Buffer buffer )
+{
+  HB_GlyphItem tmp_string;
+  int tmp_length;
+  int tmp_pos;
+
+  if ( buffer->separate_out )
+    {
+      tmp_string = buffer->in_string;
+      buffer->in_string = buffer->out_string;
+      buffer->out_string = tmp_string;
+      buffer->alt_string = buffer->out_string;
+    }
+
+  tmp_length = buffer->in_length;
+  buffer->in_length = buffer->out_length;
+  buffer->out_length = tmp_length;
+
+  tmp_pos = buffer->in_pos;
+  buffer->in_pos = buffer->out_pos;
+  buffer->out_pos = tmp_pos;
+}
+
+/* The following function copies `num_out' elements from `glyph_data'
+   to `buffer->out_string', advancing the in array pointer in the structure
+   by `num_in' elements, and the out array pointer by `num_out' elements.
+   Finally, it sets the `length' field of `out' equal to
+   `pos' of the `out' structure.
+
+   If `component' is 0xFFFF, the component value from buffer->in_pos
+   will copied `num_out' times, otherwise `component' itself will
+   be used to fill the `component' fields.
+
+   If `ligID' is 0xFFFF, the ligID value from buffer->in_pos
+   will copied `num_out' times, otherwise `ligID' itself will
+   be used to fill the `ligID' fields.
+
+   The properties for all replacement glyphs are taken
+   from the glyph at position `buffer->in_pos'.
+
+   The cluster value for the glyph at position buffer->in_pos is used
+   for all replacement glyphs */
+HB_INTERNAL HB_Error
+_hb_buffer_add_output_glyphs( HB_Buffer  buffer,
+			      HB_UShort  num_in,
+			      HB_UShort  num_out,
+			      HB_UShort *glyph_data,
+			      HB_UShort  component,
+			      HB_UShort  ligID )
+{
+  HB_Error  error;
+  HB_UShort i;
+  HB_UInt properties;
+  HB_UInt cluster;
+
+  error = hb_buffer_ensure( buffer, buffer->out_pos + num_out );
+  if ( error )
+    return error;
+
+  if ( !buffer->separate_out )
+    {
+      error = hb_buffer_duplicate_out_buffer( buffer );
+      if ( error )
+	return error;
+    }
+
+  properties = buffer->in_string[buffer->in_pos].properties;
+  cluster = buffer->in_string[buffer->in_pos].cluster;
+  if ( component == 0xFFFF )
+    component = buffer->in_string[buffer->in_pos].component;
+  if ( ligID == 0xFFFF )
+    ligID = buffer->in_string[buffer->in_pos].ligID;
+
+  for ( i = 0; i < num_out; i++ )
+  {
+    HB_GlyphItem item = &buffer->out_string[buffer->out_pos + i];
+
+    item->gindex = glyph_data[i];
+    item->properties = properties;
+    item->cluster = cluster;
+    item->component = component;
+    item->ligID = ligID;
+    item->gproperties = HB_GLYPH_PROPERTIES_UNKNOWN;
+  }
+
+  buffer->in_pos  += num_in;
+  buffer->out_pos += num_out;
+
+  buffer->out_length = buffer->out_pos;
+
+  return HB_Err_Ok;
+}
+
+HB_INTERNAL HB_Error
+_hb_buffer_add_output_glyph( HB_Buffer buffer,
+			     HB_UInt   glyph_index,
+			     HB_UShort component,
+			     HB_UShort ligID )
+{
+  HB_UShort glyph_data =  glyph_index;
+
+  return _hb_buffer_add_output_glyphs ( buffer, 1, 1,
+					&glyph_data, component, ligID );
+}
+
+HB_INTERNAL HB_Error
+_hb_buffer_copy_output_glyph ( HB_Buffer buffer )
+{  
+  HB_Error  error;
+
+  error = hb_buffer_ensure( buffer, buffer->out_pos + 1 );
+  if ( error )
+    return error;
+  
+  if ( buffer->separate_out )
+    {
+      buffer->out_string[buffer->out_pos] = buffer->in_string[buffer->in_pos];
+    }
+
+  buffer->in_pos++;
+  buffer->out_pos++;
+  buffer->out_length = buffer->out_pos;
+
+  return HB_Err_Ok;
+}
+
+HB_INTERNAL HB_Error
+_hb_buffer_replace_output_glyph( HB_Buffer buffer,
+				 HB_UInt   glyph_index,
+				 HB_Bool   inplace )
+{
+
+  HB_Error error;
+
+  if ( inplace )
+    {
+      error = _hb_buffer_copy_output_glyph ( buffer );
+      if ( error )
+	return error;
+
+      buffer->out_string[buffer->out_pos-1].gindex = glyph_index;
+    }
+  else
+    {
+      return _hb_buffer_add_output_glyph( buffer, glyph_index, 0xFFFF, 0xFFFF );
+    }
+
+  return HB_Err_Ok;
+}
+
+HB_INTERNAL HB_UShort
+_hb_buffer_allocate_ligid( HB_Buffer buffer )
+{
+  buffer->max_ligID++;
+  if (HB_UNLIKELY (buffer->max_ligID == 0))
+    buffer->max_ligID++;
+
+  return buffer->max_ligID;
+}