Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/pfr/pfrobjs.c

Index: third_party/freetype2/src/src/pfr/pfrobjs.c
diff --git a/third_party/freetype2/src/src/pfr/pfrobjs.c b/third_party/freetype2/src/src/pfr/pfrobjs.c
new file mode 100644
index 0000000000000000000000000000000000000000..20d316d6f040d1b468db202d33e25d474ec4dc71
--- /dev/null
+++ b/third_party/freetype2/src/src/pfr/pfrobjs.c
@@ -0,0 +1,602 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pfrobjs.c                                                              */
+/*                                                                         */
+/*    FreeType PFR object methods (body).                                  */
+/*                                                                         */
+/*  Copyright 2002-2015 by                                                 */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  This file is part of the FreeType project, and may only be used,       */
+/*  modified, and distributed under the terms of the FreeType project      */
+/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
+/*  this file you indicate that you have read the license and              */
+/*  understand and accept it fully.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include "pfrobjs.h"
+#include "pfrload.h"
+#include "pfrgload.h"
+#include "pfrcmap.h"
+#include "pfrsbit.h"
+#include FT_OUTLINE_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_CALC_H
+#include FT_TRUETYPE_IDS_H
+
+#include "pfrerror.h"
+
+#undef  FT_COMPONENT
+#define FT_COMPONENT  trace_pfr
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                     FACE OBJECT METHODS                       *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  FT_LOCAL_DEF( void )
+  pfr_face_done( FT_Face  pfrface )     /* PFR_Face */
+  {
+    PFR_Face   face = (PFR_Face)pfrface;
+    FT_Memory  memory;
+
+
+    if ( !face )
+      return;
+
+    memory = pfrface->driver->root.memory;
+
+    /* we don't want dangling pointers */
+    pfrface->family_name = NULL;
+    pfrface->style_name  = NULL;
+
+    /* finalize the physical font record */
+    pfr_phy_font_done( &face->phy_font, FT_FACE_MEMORY( face ) );
+
+    /* no need to finalize the logical font or the header */
+    FT_FREE( pfrface->available_sizes );
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  pfr_face_init( FT_Stream      stream,
+                 FT_Face        pfrface,
+                 FT_Int         face_index,
+                 FT_Int         num_params,
+                 FT_Parameter*  params )
+  {
+    PFR_Face  face = (PFR_Face)pfrface;
+    FT_Error  error;
+
+    FT_UNUSED( num_params );
+    FT_UNUSED( params );
+
+
+    FT_TRACE2(( "PFR driver\n" ));
+
+    /* load the header and check it */
+    error = pfr_header_load( &face->header, stream );
+    if ( error )
+      goto Exit;
+
+    if ( !pfr_header_check( &face->header ) )
+    {
+      FT_TRACE2(( "  not a PFR font\n" ));
+      error = FT_THROW( Unknown_File_Format );
+      goto Exit;
+    }
+
+    /* check face index */
+    {
+      FT_Long  num_faces;
+
+
+      error = pfr_log_font_count( stream,
+                                  face->header.log_dir_offset,
+                                  &num_faces );
+      if ( error )
+        goto Exit;
+
+      pfrface->num_faces = num_faces;
+    }
+
+    if ( face_index < 0 )
+      goto Exit;
+
+    if ( ( face_index & 0xFFFF ) >= pfrface->num_faces )
+    {
+      FT_ERROR(( "pfr_face_init: invalid face index\n" ));
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    /* load the face */
+    error = pfr_log_font_load(
+              &face->log_font,
+              stream,
+              (FT_UInt)( face_index & 0xFFFF ),
+              face->header.log_dir_offset,
+              FT_BOOL( face->header.phy_font_max_size_high != 0 ) );
+    if ( error )
+      goto Exit;
+
+    /* now load the physical font descriptor */
+    error = pfr_phy_font_load( &face->phy_font, stream,
+                               face->log_font.phys_offset,
+                               face->log_font.phys_size );
+    if ( error )
+      goto Exit;
+
+    /* now set up all root face fields */
+    {
+      PFR_PhyFont  phy_font = &face->phy_font;
+
+
+      pfrface->face_index = face_index & 0xFFFF;
+      pfrface->num_glyphs = (FT_Long)phy_font->num_chars + 1;
+
+      pfrface->face_flags |= FT_FACE_FLAG_SCALABLE;
+
+      /* if gps_offset == 0 for all characters, we  */
+      /* assume that the font only contains bitmaps */
+      {
+        FT_UInt  nn;
+
+
+        for ( nn = 0; nn < phy_font->num_chars; nn++ )
+          if ( phy_font->chars[nn].gps_offset != 0 )
+            break;
+
+        if ( nn == phy_font->num_chars )
+        {
+          if ( phy_font->num_strikes > 0 )
+            pfrface->face_flags = 0;        /* not scalable */
+          else
+          {
+            FT_ERROR(( "pfr_face_init: font doesn't contain glyphs\n" ));
+            error = FT_THROW( Invalid_File_Format );
+            goto Exit;
+          }
+        }
+      }
+
+      if ( ( phy_font->flags & PFR_PHY_PROPORTIONAL ) == 0 )
+        pfrface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
+
+      if ( phy_font->flags & PFR_PHY_VERTICAL )
+        pfrface->face_flags |= FT_FACE_FLAG_VERTICAL;
+      else
+        pfrface->face_flags |= FT_FACE_FLAG_HORIZONTAL;
+
+      if ( phy_font->num_strikes > 0 )
+        pfrface->face_flags |= FT_FACE_FLAG_FIXED_SIZES;
+
+      if ( phy_font->num_kern_pairs > 0 )
+        pfrface->face_flags |= FT_FACE_FLAG_KERNING;
+
+      /* If no family name was found in the `undocumented' auxiliary
+       * data, use the font ID instead.  This sucks but is better than
+       * nothing.
+       */
+      pfrface->family_name = phy_font->family_name;
+      if ( pfrface->family_name == NULL )
+        pfrface->family_name = phy_font->font_id;
+
+      /* note that the style name can be NULL in certain PFR fonts,
+       * probably meaning `Regular'
+       */
+      pfrface->style_name = phy_font->style_name;
+
+      pfrface->num_fixed_sizes = 0;
+      pfrface->available_sizes = NULL;
+
+      pfrface->bbox         = phy_font->bbox;
+      pfrface->units_per_EM = (FT_UShort)phy_font->outline_resolution;
+      pfrface->ascender     = (FT_Short) phy_font->bbox.yMax;
+      pfrface->descender    = (FT_Short) phy_font->bbox.yMin;
+
+      pfrface->height = (FT_Short)( ( pfrface->units_per_EM * 12 ) / 10 );
+      if ( pfrface->height < pfrface->ascender - pfrface->descender )
+        pfrface->height = (FT_Short)(pfrface->ascender - pfrface->descender);
+
+      if ( phy_font->num_strikes > 0 )
+      {
+        FT_UInt          n, count = phy_font->num_strikes;
+        FT_Bitmap_Size*  size;
+        PFR_Strike       strike;
+        FT_Memory        memory = pfrface->stream->memory;
+
+
+        if ( FT_NEW_ARRAY( pfrface->available_sizes, count ) )
+          goto Exit;
+
+        size   = pfrface->available_sizes;
+        strike = phy_font->strikes;
+        for ( n = 0; n < count; n++, size++, strike++ )
+        {
+          size->height = (FT_Short)strike->y_ppm;
+          size->width  = (FT_Short)strike->x_ppm;
+          size->size   = (FT_Pos)( strike->y_ppm << 6 );
+          size->x_ppem = (FT_Pos)( strike->x_ppm << 6 );
+          size->y_ppem = (FT_Pos)( strike->y_ppm << 6 );
+        }
+        pfrface->num_fixed_sizes = (FT_Int)count;
+      }
+
+      /* now compute maximum advance width */
+      if ( ( phy_font->flags & PFR_PHY_PROPORTIONAL ) == 0 )
+        pfrface->max_advance_width = (FT_Short)phy_font->standard_advance;
+      else
+      {
+        FT_Int    max = 0;
+        FT_UInt   count = phy_font->num_chars;
+        PFR_Char  gchar = phy_font->chars;
+
+
+        for ( ; count > 0; count--, gchar++ )
+        {
+          if ( max < gchar->advance )
+            max = gchar->advance;
+        }
+
+        pfrface->max_advance_width = (FT_Short)max;
+      }
+
+      pfrface->max_advance_height = pfrface->height;
+
+      pfrface->underline_position  = (FT_Short)( -pfrface->units_per_EM / 10 );
+      pfrface->underline_thickness = (FT_Short)(  pfrface->units_per_EM / 30 );
+
+      /* create charmap */
+      {
+        FT_CharMapRec  charmap;
+
+
+        charmap.face        = pfrface;
+        charmap.platform_id = TT_PLATFORM_MICROSOFT;
+        charmap.encoding_id = TT_MS_ID_UNICODE_CS;
+        charmap.encoding    = FT_ENCODING_UNICODE;
+
+        error = FT_CMap_New( &pfr_cmap_class_rec, NULL, &charmap, NULL );
+
+#if 0
+        /* select default charmap */
+        if ( pfrface->num_charmaps )
+          pfrface->charmap = pfrface->charmaps[0];
+#endif
+      }
+
+      /* check whether we have loaded any kerning pairs */
+      if ( phy_font->num_kern_pairs )
+        pfrface->face_flags |= FT_FACE_FLAG_KERNING;
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                    SLOT OBJECT METHOD                         *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  FT_LOCAL_DEF( FT_Error )
+  pfr_slot_init( FT_GlyphSlot  pfrslot )        /* PFR_Slot */
+  {
+    PFR_Slot        slot   = (PFR_Slot)pfrslot;
+    FT_GlyphLoader  loader = pfrslot->internal->loader;
+
+
+    pfr_glyph_init( &slot->glyph, loader );
+
+    return 0;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  pfr_slot_done( FT_GlyphSlot  pfrslot )        /* PFR_Slot */
+  {
+    PFR_Slot  slot = (PFR_Slot)pfrslot;
+
+
+    pfr_glyph_done( &slot->glyph );
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  pfr_slot_load( FT_GlyphSlot  pfrslot,         /* PFR_Slot */
+                 FT_Size       pfrsize,         /* PFR_Size */
+                 FT_UInt       gindex,
+                 FT_Int32      load_flags )
+  {
+    PFR_Slot     slot    = (PFR_Slot)pfrslot;
+    PFR_Size     size    = (PFR_Size)pfrsize;
+    FT_Error     error;
+    PFR_Face     face    = (PFR_Face)pfrslot->face;
+    PFR_Char     gchar;
+    FT_Outline*  outline = &pfrslot->outline;
+    FT_ULong     gps_offset;
+
+
+    FT_TRACE1(( "pfr_slot_load: glyph index %d\n", gindex ));
+
+    if ( gindex > 0 )
+      gindex--;
+
+    if ( !face || gindex >= face->phy_font.num_chars )
+    {
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    /* try to load an embedded bitmap */
+    if ( ( load_flags & ( FT_LOAD_NO_SCALE | FT_LOAD_NO_BITMAP ) ) == 0 )
+    {
+      error = pfr_slot_load_bitmap( slot, size, gindex );
+      if ( error == 0 )
+        goto Exit;
+    }
+
+    if ( load_flags & FT_LOAD_SBITS_ONLY )
+    {
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    gchar               = face->phy_font.chars + gindex;
+    pfrslot->format     = FT_GLYPH_FORMAT_OUTLINE;
+    outline->n_points   = 0;
+    outline->n_contours = 0;
+    gps_offset          = face->header.gps_section_offset;
+
+    /* load the glyph outline (FT_LOAD_NO_RECURSE isn't supported) */
+    error = pfr_glyph_load( &slot->glyph, face->root.stream,
+                            gps_offset, gchar->gps_offset, gchar->gps_size );
+
+    if ( !error )
+    {
+      FT_BBox            cbox;
+      FT_Glyph_Metrics*  metrics = &pfrslot->metrics;
+      FT_Pos             advance;
+      FT_UInt            em_metrics, em_outline;
+      FT_Bool            scaling;
+
+
+      scaling = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 );
+
+      /* copy outline data */
+      *outline = slot->glyph.loader->base.outline;
+
+      outline->flags &= ~FT_OUTLINE_OWNER;
+      outline->flags |= FT_OUTLINE_REVERSE_FILL;
+
+      if ( size && pfrsize->metrics.y_ppem < 24 )
+        outline->flags |= FT_OUTLINE_HIGH_PRECISION;
+
+      /* compute the advance vector */
+      metrics->horiAdvance = 0;
+      metrics->vertAdvance = 0;
+
+      advance    = gchar->advance;
+      em_metrics = face->phy_font.metrics_resolution;
+      em_outline = face->phy_font.outline_resolution;
+
+      if ( em_metrics != em_outline )
+        advance = FT_MulDiv( advance,
+                             (FT_Long)em_outline,
+                             (FT_Long)em_metrics );
+
+      if ( face->phy_font.flags & PFR_PHY_VERTICAL )
+        metrics->vertAdvance = advance;
+      else
+        metrics->horiAdvance = advance;
+
+      pfrslot->linearHoriAdvance = metrics->horiAdvance;
+      pfrslot->linearVertAdvance = metrics->vertAdvance;
+
+      /* make up vertical metrics(?) */
+      metrics->vertBearingX = 0;
+      metrics->vertBearingY = 0;
+
+#if 0 /* some fonts seem to be broken here! */
+
+      /* Apply the font matrix, if any.                 */
+      /* TODO: Test existing fonts with unusual matrix  */
+      /* whether we have to adjust Units per EM.        */
+      {
+        FT_Matrix font_matrix;
+
+
+        font_matrix.xx = face->log_font.matrix[0] << 8;
+        font_matrix.yx = face->log_font.matrix[1] << 8;
+        font_matrix.xy = face->log_font.matrix[2] << 8;
+        font_matrix.yy = face->log_font.matrix[3] << 8;
+
+        FT_Outline_Transform( outline, &font_matrix );
+      }
+#endif
+
+      /* scale when needed */
+      if ( scaling )
+      {
+        FT_Int      n;
+        FT_Fixed    x_scale = pfrsize->metrics.x_scale;
+        FT_Fixed    y_scale = pfrsize->metrics.y_scale;
+        FT_Vector*  vec     = outline->points;
+
+
+        /* scale outline points */
+        for ( n = 0; n < outline->n_points; n++, vec++ )
+        {
+          vec->x = FT_MulFix( vec->x, x_scale );
+          vec->y = FT_MulFix( vec->y, y_scale );
+        }
+
+        /* scale the advance */
+        metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
+        metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
+      }
+
+      /* compute the rest of the metrics */
+      FT_Outline_Get_CBox( outline, &cbox );
+
+      metrics->width        = cbox.xMax - cbox.xMin;
+      metrics->height       = cbox.yMax - cbox.yMin;
+      metrics->horiBearingX = cbox.xMin;
+      metrics->horiBearingY = cbox.yMax - metrics->height;
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                      KERNING METHOD                           *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  FT_LOCAL_DEF( FT_Error )
+  pfr_face_get_kerning( FT_Face     pfrface,        /* PFR_Face */
+                        FT_UInt     glyph1,
+                        FT_UInt     glyph2,
+                        FT_Vector*  kerning )
+  {
+    PFR_Face     face     = (PFR_Face)pfrface;
+    FT_Error     error    = FT_Err_Ok;
+    PFR_PhyFont  phy_font = &face->phy_font;
+    FT_UInt32    code1, code2, pair;
+
+
+    kerning->x = 0;
+    kerning->y = 0;
+
+    if ( glyph1 > 0 )
+      glyph1--;
+
+    if ( glyph2 > 0 )
+      glyph2--;
+
+    /* convert glyph indices to character codes */
+    if ( glyph1 > phy_font->num_chars ||
+         glyph2 > phy_font->num_chars )
+      goto Exit;
+
+    code1 = phy_font->chars[glyph1].char_code;
+    code2 = phy_font->chars[glyph2].char_code;
+    pair  = PFR_KERN_INDEX( code1, code2 );
+
+    /* now search the list of kerning items */
+    {
+      PFR_KernItem  item   = phy_font->kern_items;
+      FT_Stream     stream = pfrface->stream;
+
+
+      for ( ; item; item = item->next )
+      {
+        if ( pair >= item->pair1 && pair <= item->pair2 )
+          goto FoundPair;
+      }
+      goto Exit;
+
+    FoundPair: /* we found an item, now parse it and find the value if any */
+      if ( FT_STREAM_SEEK( item->offset )                       ||
+           FT_FRAME_ENTER( item->pair_count * item->pair_size ) )
+        goto Exit;
+
+      {
+        FT_UInt    count       = item->pair_count;
+        FT_UInt    size        = item->pair_size;
+        FT_UInt    power       = 1 << FT_MSB( count );
+        FT_UInt    probe       = power * size;
+        FT_UInt    extra       = count - power;
+        FT_Byte*   base        = stream->cursor;
+        FT_Bool    twobytes    = FT_BOOL( item->flags & 1 );
+        FT_Bool    twobyte_adj = FT_BOOL( item->flags & 2 );
+        FT_Byte*   p;
+        FT_UInt32  cpair;
+
+
+        if ( extra > 0 )
+        {
+          p = base + extra * size;
+
+          if ( twobytes )
+            cpair = FT_NEXT_ULONG( p );
+          else
+            cpair = PFR_NEXT_KPAIR( p );
+
+          if ( cpair == pair )
+            goto Found;
+
+          if ( cpair < pair )
+          {
+            if ( twobyte_adj )
+              p += 2;
+            else
+              p++;
+            base = p;
+          }
+        }
+
+        while ( probe > size )
+        {
+          probe >>= 1;
+          p       = base + probe;
+
+          if ( twobytes )
+            cpair = FT_NEXT_ULONG( p );
+          else
+            cpair = PFR_NEXT_KPAIR( p );
+
+          if ( cpair == pair )
+            goto Found;
+
+          if ( cpair < pair )
+            base += probe;
+        }
+
+        p = base;
+
+        if ( twobytes )
+          cpair = FT_NEXT_ULONG( p );
+        else
+          cpair = PFR_NEXT_KPAIR( p );
+
+        if ( cpair == pair )
+        {
+          FT_Int  value;
+
+
+        Found:
+          if ( twobyte_adj )
+            value = FT_PEEK_SHORT( p );
+          else
+            value = p[0];
+
+          kerning->x = item->base_adj + value;
+        }
+      }
+
+      FT_FRAME_EXIT();
+    }
+
+  Exit:
+    return error;
+  }
+
+
+/* END */