C++ (Cpp) PANGO_UNITS_26_6 Examples

Example #1

File: pango-ot-buffer.c Project: nihed/magnetism

static void
apply_gpos_ltr (PangoGlyphString *glyphs,
		HB_Position      positions)
{
  int i;
	    
  for (i = 0; i < glyphs->num_glyphs; i++)
    {
      FT_Pos x_pos = positions[i].x_pos;
      FT_Pos y_pos = positions[i].y_pos;
      int back = i;
      int j;
      
      while (positions[back].back != 0)
	{
	  back  -= positions[back].back;
	  x_pos += positions[back].x_pos;
	  y_pos += positions[back].y_pos;
	}
      
      for (j = back; j < i; j++)
	glyphs->glyphs[i].geometry.x_offset -= glyphs->glyphs[j].geometry.width;
      
      glyphs->glyphs[i].geometry.x_offset += PANGO_UNITS_26_6(x_pos);
      glyphs->glyphs[i].geometry.y_offset -= PANGO_UNITS_26_6(y_pos);
      
      if (positions[i].new_advance)
	glyphs->glyphs[i].geometry.width  = PANGO_UNITS_26_6(positions[i].x_advance);
      else
	glyphs->glyphs[i].geometry.width += PANGO_UNITS_26_6(positions[i].x_advance);
    }
}

Example #2

File: pango-ot-ruleset.c Project: zjx632/tinygtk

/**
 * pango_ot_ruleset_shape:
 * @ruleset: a #PangoOTRuleset.
 * @glyphs: a pointer to a #PangoGlyphString.
 * @properties: an array containing one #gulong bitfield for each glyph,
 *   which gives the glyph's properties: If a certain bit is set for a glyph, 
 *   the feature which has the same bit set in its property value is applied.
 *
 * Shapes a string of glyphs with the given properties according to @ruleset.
 **/
void
pango_ot_ruleset_shape (PangoOTRuleset   *ruleset,
			PangoGlyphString *glyphs,
			gulong           *properties)
{
  int i;
  int last_cluster;
  int result;
  
  TTO_GSUB gsub = NULL;
  TTO_GPOS gpos = NULL;
  
  TTO_GSUB_String *in_string = NULL;
  TTO_GSUB_String *out_string = NULL;
  TTO_GSUB_String *result_string = NULL;

  gboolean need_gsub = FALSE;
  gboolean need_gpos = FALSE;

  g_return_if_fail (PANGO_OT_IS_RULESET (ruleset));

  for (i = 0; i < ruleset->rules->len; i++)
    {
      PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i);

      if (rule->table_type == PANGO_OT_TABLE_GSUB)
	need_gsub = TRUE;
      else 
	need_gpos = TRUE;
    }

  if (need_gsub)
    {
      gsub = pango_ot_info_get_gsub (ruleset->info);

      if (gsub)
	TT_GSUB_Clear_Features (gsub);
    }

  if (need_gpos)
    {
      gpos = pango_ot_info_get_gpos (ruleset->info);

      if (gpos)
	TT_GPOS_Clear_Features (gpos);
    }

  for (i = 0; i < ruleset->rules->len; i++)
    {
      PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i);

      if (rule->table_type == PANGO_OT_TABLE_GSUB)
	{
	  if (gsub)
	    TT_GSUB_Add_Feature (gsub, rule->feature_index, rule->property_bit);
	}
      else
	{
	  if (gpos)
	    TT_GPOS_Add_Feature (gpos, rule->feature_index, rule->property_bit);
	}
    }

  if (!gsub && !gpos)
    return;

  result = TT_GSUB_String_New (ruleset->info->face->memory, &in_string);
  g_assert (result == FT_Err_Ok);

  result = TT_GSUB_String_Set_Length (in_string, glyphs->num_glyphs);
  g_assert (result == FT_Err_Ok);

  for (i = 0; i < glyphs->num_glyphs; i++)
    {
      in_string->string[i] = glyphs->glyphs[i].glyph;
      in_string->properties[i] = properties[i];
      in_string->logClusters[i] = glyphs->log_clusters[i];
    }
  in_string->max_ligID = i;
  
  if (gsub)
    {
      result = TT_GSUB_String_New (ruleset->info->face->memory,
                                   &out_string);
      g_assert (result == FT_Err_Ok);
      result_string = out_string;

      TT_GSUB_Apply_String (gsub, in_string, out_string);
    }
  else
    result_string = in_string;

  if (gpos)
    {
      TTO_GPOS_Data *outgpos = NULL;

      if (!TT_GPOS_Apply_String (ruleset->info->face, gpos, 0, result_string, &outgpos,
				 FALSE /* enable device-dependant values */,
				 FALSE /* Even though this might be r2l text, RTL is handled elsewhere */))
	{
	  for (i = 0; i < result_string->length; i++)
	    {
	      FT_Pos x_pos = outgpos[i].x_pos;
	      FT_Pos y_pos = outgpos[i].y_pos;
	      int back = i;
	      int j;

	      while (outgpos[back].back != 0)
		{
		  back  -= outgpos[back].back;
		  x_pos += outgpos[back].x_pos;
		  y_pos += outgpos[back].y_pos;
		}

	      for (j = back; j < i; j++)
	        glyphs->glyphs[i].geometry.x_offset -= glyphs->glyphs[j].geometry.width;

	      glyphs->glyphs[i].geometry.x_offset += PANGO_UNITS_26_6(x_pos);
	      glyphs->glyphs[i].geometry.y_offset += PANGO_UNITS_26_6(y_pos);

	      if (outgpos[i].new_advance)
		glyphs->glyphs[i].geometry.width  = PANGO_UNITS_26_6(outgpos[i].x_advance);
	      else
		glyphs->glyphs[i].geometry.width += PANGO_UNITS_26_6(outgpos[i].x_advance);
	    }

	  FT_Free(gpos->memory, (void *)outgpos);
	}
    }

  pango_glyph_string_set_size (glyphs, result_string->length);

  last_cluster = -1;
  for (i = 0; i < result_string->length; i++)
    {
      glyphs->glyphs[i].glyph = result_string->string[i];

      glyphs->log_clusters[i] = result_string->logClusters[i];
      if (glyphs->log_clusters[i] != last_cluster)
	glyphs->glyphs[i].attr.is_cluster_start = 1;
      else
	glyphs->glyphs[i].attr.is_cluster_start = 0;

      last_cluster = glyphs->log_clusters[i];
    }

  if (in_string)
    TT_GSUB_String_Done (in_string);
  if (out_string)
    TT_GSUB_String_Done (out_string);
}