Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/cid/cidgload.c

Index: third_party/freetype2/src/src/cid/cidgload.c
diff --git a/third_party/freetype2/src/src/cid/cidgload.c b/third_party/freetype2/src/src/cid/cidgload.c
new file mode 100644
index 0000000000000000000000000000000000000000..d402f8e165477de24123f2ea163723f3a82ddde8
--- /dev/null
+++ b/third_party/freetype2/src/src/cid/cidgload.c
@@ -0,0 +1,457 @@
+/***************************************************************************/
+/*                                                                         */
+/*  cidgload.c                                                             */
+/*                                                                         */
+/*    CID-keyed Type1 Glyph Loader (body).                                 */
+/*                                                                         */
+/*  Copyright 1996-2015 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 <ft2build.h>
+#include "cidload.h"
+#include "cidgload.h"
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_OUTLINE_H
+#include FT_INTERNAL_CALC_H
+
+#include "ciderrs.h"
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
+  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
+  /* messages during execution.                                            */
+  /*                                                                       */
+#undef  FT_COMPONENT
+#define FT_COMPONENT  trace_cidgload
+
+
+  FT_CALLBACK_DEF( FT_Error )
+  cid_load_glyph( T1_Decoder  decoder,
+                  FT_UInt     glyph_index )
+  {
+    CID_Face       face = (CID_Face)decoder->builder.face;
+    CID_FaceInfo   cid  = &face->cid;
+    FT_Byte*       p;
+    FT_ULong       fd_select;
+    FT_Stream      stream       = face->cid_stream;
+    FT_Error       error        = FT_Err_Ok;
+    FT_Byte*       charstring   = NULL;
+    FT_Memory      memory       = face->root.memory;
+    FT_ULong       glyph_length = 0;
+    PSAux_Service  psaux        = (PSAux_Service)face->psaux;
+
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+    FT_Incremental_InterfaceRec *inc =
+                                  face->root.internal->incremental_interface;
+#endif
+
+
+    FT_TRACE1(( "cid_load_glyph: glyph index %d\n", glyph_index ));
+
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+
+    /* For incremental fonts get the character data using */
+    /* the callback function.                             */
+    if ( inc )
+    {
+      FT_Data  glyph_data;
+
+
+      error = inc->funcs->get_glyph_data( inc->object,
+                                          glyph_index, &glyph_data );
+      if ( error )
+        goto Exit;
+
+      p         = (FT_Byte*)glyph_data.pointer;
+      fd_select = cid_get_offset( &p, (FT_Byte)cid->fd_bytes );
+
+      if ( glyph_data.length != 0 )
+      {
+        glyph_length = (FT_ULong)( glyph_data.length - cid->fd_bytes );
+        (void)FT_ALLOC( charstring, glyph_length );
+        if ( !error )
+          ft_memcpy( charstring, glyph_data.pointer + cid->fd_bytes,
+                     glyph_length );
+      }
+
+      inc->funcs->free_glyph_data( inc->object, &glyph_data );
+
+      if ( error )
+        goto Exit;
+    }
+
+    else
+
+#endif /* FT_CONFIG_OPTION_INCREMENTAL */
+
+    /* For ordinary fonts read the CID font dictionary index */
+    /* and charstring offset from the CIDMap.                */
+    {
+      FT_UInt   entry_len = (FT_UInt)( cid->fd_bytes + cid->gd_bytes );
+      FT_ULong  off1, off2;
+
+
+      if ( FT_STREAM_SEEK( cid->data_offset + cid->cidmap_offset +
+                           glyph_index * entry_len )               ||
+           FT_FRAME_ENTER( 2 * entry_len )                         )
+        goto Exit;
+
+      p         = (FT_Byte*)stream->cursor;
+      fd_select = cid_get_offset( &p, (FT_Byte)cid->fd_bytes );
+      off1      = cid_get_offset( &p, (FT_Byte)cid->gd_bytes );
+      p        += cid->fd_bytes;
+      off2      = cid_get_offset( &p, (FT_Byte)cid->gd_bytes );
+      FT_FRAME_EXIT();
+
+      if ( fd_select >= (FT_ULong)cid->num_dicts ||
+           off2 > stream->size                   ||
+           off1 > off2                           )
+      {
+        FT_TRACE0(( "cid_load_glyph: invalid glyph stream offsets\n" ));
+        error = FT_THROW( Invalid_Offset );
+        goto Exit;
+      }
+
+      glyph_length = off2 - off1;
+      if ( glyph_length == 0 )
+        goto Exit;
+      if ( FT_ALLOC( charstring, glyph_length ) )
+        goto Exit;
+      if ( FT_STREAM_READ_AT( cid->data_offset + off1,
+                              charstring, glyph_length ) )
+        goto Exit;
+    }
+
+    /* Now set up the subrs array and parse the charstrings. */
+    {
+      CID_FaceDict  dict;
+      CID_Subrs     cid_subrs = face->subrs + fd_select;
+      FT_UInt       cs_offset;
+
+
+      /* Set up subrs */
+      decoder->num_subrs = cid_subrs->num_subrs;
+      decoder->subrs     = cid_subrs->code;
+      decoder->subrs_len = 0;
+
+      /* Set up font matrix */
+      dict                 = cid->font_dicts + fd_select;
+
+      decoder->font_matrix = dict->font_matrix;
+      decoder->font_offset = dict->font_offset;
+      decoder->lenIV       = dict->private_dict.lenIV;
+
+      /* Decode the charstring. */
+
+      /* Adjustment for seed bytes. */
+      cs_offset = decoder->lenIV >= 0 ? (FT_UInt)decoder->lenIV : 0;
+      if ( cs_offset > glyph_length )
+      {
+        FT_TRACE0(( "cid_load_glyph: invalid glyph stream offsets\n" ));
+        error = FT_THROW( Invalid_Offset );
+        goto Exit;
+      }
+
+      /* Decrypt only if lenIV >= 0. */
+      if ( decoder->lenIV >= 0 )
+        psaux->t1_decrypt( charstring, glyph_length, 4330 );
+
+      error = decoder->funcs.parse_charstrings(
+                decoder, charstring + cs_offset,
+                glyph_length - cs_offset );
+    }
+
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+
+    /* Incremental fonts can optionally override the metrics. */
+    if ( !error && inc && inc->funcs->get_glyph_metrics )
+    {
+      FT_Incremental_MetricsRec  metrics;
+
+
+      metrics.bearing_x = FIXED_TO_INT( decoder->builder.left_bearing.x );
+      metrics.bearing_y = 0;
+      metrics.advance   = FIXED_TO_INT( decoder->builder.advance.x );
+      metrics.advance_v = FIXED_TO_INT( decoder->builder.advance.y );
+
+      error = inc->funcs->get_glyph_metrics( inc->object,
+                                             glyph_index, FALSE, &metrics );
+
+      decoder->builder.left_bearing.x = INT_TO_FIXED( metrics.bearing_x );
+      decoder->builder.advance.x      = INT_TO_FIXED( metrics.advance );
+      decoder->builder.advance.y      = INT_TO_FIXED( metrics.advance_v );
+    }
+
+#endif /* FT_CONFIG_OPTION_INCREMENTAL */
+
+  Exit:
+    FT_FREE( charstring );
+
+    return error;
+  }
+
+
+#if 0
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*************************************************************************/
+  /**********                                                      *********/
+  /**********                                                      *********/
+  /**********            COMPUTE THE MAXIMUM ADVANCE WIDTH         *********/
+  /**********                                                      *********/
+  /**********    The following code is in charge of computing      *********/
+  /**********    the maximum advance width of the font.  It        *********/
+  /**********    quickly processes each glyph charstring to        *********/
+  /**********    extract the value from either a `sbw' or `seac'   *********/
+  /**********    operator.                                         *********/
+  /**********                                                      *********/
+  /*************************************************************************/
+  /*************************************************************************/
+  /*************************************************************************/
+
+
+  FT_LOCAL_DEF( FT_Error )
+  cid_face_compute_max_advance( CID_Face  face,
+                                FT_Int*   max_advance )
+  {
+    FT_Error       error;
+    T1_DecoderRec  decoder;
+    FT_Int         glyph_index;
+
+    PSAux_Service  psaux = (PSAux_Service)face->psaux;
+
+
+    *max_advance = 0;
+
+    /* Initialize load decoder */
+    error = psaux->t1_decoder_funcs->init( &decoder,
+                                           (FT_Face)face,
+                                           0, /* size       */
+                                           0, /* glyph slot */
+                                           0, /* glyph names! XXX */
+                                           0, /* blend == 0 */
+                                           0, /* hinting == 0 */
+                                           cid_load_glyph );
+    if ( error )
+      return error;
+
+    /* TODO: initialize decoder.len_buildchar and decoder.buildchar */
+    /*       if we ever support CID-keyed multiple master fonts     */
+
+    decoder.builder.metrics_only = 1;
+    decoder.builder.load_points  = 0;
+
+    /* for each glyph, parse the glyph charstring and extract */
+    /* the advance width                                      */
+    for ( glyph_index = 0; glyph_index < face->root.num_glyphs;
+          glyph_index++ )
+    {
+      /* now get load the unscaled outline */
+      error = cid_load_glyph( &decoder, glyph_index );
+      /* ignore the error if one occurred - skip to next glyph */
+    }
+
+    *max_advance = FIXED_TO_INT( decoder.builder.advance.x );
+
+    psaux->t1_decoder_funcs->done( &decoder );
+
+    return FT_Err_Ok;
+  }
+
+
+#endif /* 0 */
+
+
+  FT_LOCAL_DEF( FT_Error )
+  cid_slot_load_glyph( FT_GlyphSlot  cidglyph,      /* CID_GlyphSlot */
+                       FT_Size       cidsize,       /* CID_Size      */
+                       FT_UInt       glyph_index,
+                       FT_Int32      load_flags )
+  {
+    CID_GlyphSlot  glyph = (CID_GlyphSlot)cidglyph;
+    FT_Error       error;
+    T1_DecoderRec  decoder;
+    CID_Face       face = (CID_Face)cidglyph->face;
+    FT_Bool        hinting;
+
+    PSAux_Service  psaux = (PSAux_Service)face->psaux;
+    FT_Matrix      font_matrix;
+    FT_Vector      font_offset;
+
+
+    if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
+    {
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    if ( load_flags & FT_LOAD_NO_RECURSE )
+      load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
+
+    glyph->x_scale = cidsize->metrics.x_scale;
+    glyph->y_scale = cidsize->metrics.y_scale;
+
+    cidglyph->outline.n_points   = 0;
+    cidglyph->outline.n_contours = 0;
+
+    hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 &&
+                       ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
+
+    cidglyph->format = FT_GLYPH_FORMAT_OUTLINE;
+
+    error = psaux->t1_decoder_funcs->init( &decoder,
+                                           cidglyph->face,
+                                           cidsize,
+                                           cidglyph,
+                                           0, /* glyph names -- XXX */
+                                           0, /* blend == 0 */
+                                           hinting,
+                                           FT_LOAD_TARGET_MODE( load_flags ),
+                                           cid_load_glyph );
+    if ( error )
+      goto Exit;
+
+    /* TODO: initialize decoder.len_buildchar and decoder.buildchar */
+    /*       if we ever support CID-keyed multiple master fonts     */
+
+    /* set up the decoder */
+    decoder.builder.no_recurse = FT_BOOL(
+      ( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) );
+
+    error = cid_load_glyph( &decoder, glyph_index );
+    if ( error )
+      goto Exit;
+
+    font_matrix = decoder.font_matrix;
+    font_offset = decoder.font_offset;
+
+    /* save new glyph tables */
+    psaux->t1_decoder_funcs->done( &decoder );
+
+    /* now set the metrics -- this is rather simple, as    */
+    /* the left side bearing is the xMin, and the top side */
+    /* bearing the yMax                                    */
+    cidglyph->outline.flags &= FT_OUTLINE_OWNER;
+    cidglyph->outline.flags |= FT_OUTLINE_REVERSE_FILL;
+
+    /* for composite glyphs, return only left side bearing and */
+    /* advance width                                           */
+    if ( load_flags & FT_LOAD_NO_RECURSE )
+    {
+      FT_Slot_Internal  internal = cidglyph->internal;
+
+
+      cidglyph->metrics.horiBearingX =
+        FIXED_TO_INT( decoder.builder.left_bearing.x );
+      cidglyph->metrics.horiAdvance =
+        FIXED_TO_INT( decoder.builder.advance.x );
+
+      internal->glyph_matrix      = font_matrix;
+      internal->glyph_delta       = font_offset;
+      internal->glyph_transformed = 1;
+    }
+    else
+    {
+      FT_BBox            cbox;
+      FT_Glyph_Metrics*  metrics = &cidglyph->metrics;
+
+
+      /* copy the _unscaled_ advance width */
+      metrics->horiAdvance =
+        FIXED_TO_INT( decoder.builder.advance.x );
+      cidglyph->linearHoriAdvance =
+        FIXED_TO_INT( decoder.builder.advance.x );
+      cidglyph->internal->glyph_transformed = 0;
+
+      /* make up vertical ones */
+      metrics->vertAdvance        = ( face->cid.font_bbox.yMax -
+                                      face->cid.font_bbox.yMin ) >> 16;
+      cidglyph->linearVertAdvance = metrics->vertAdvance;
+
+      cidglyph->format            = FT_GLYPH_FORMAT_OUTLINE;
+
+      if ( cidsize->metrics.y_ppem < 24 )
+        cidglyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
+
+      /* apply the font matrix, if any */
+      if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L ||
+           font_matrix.xy != 0        || font_matrix.yx != 0        )
+      {
+        FT_Outline_Transform( &cidglyph->outline, &font_matrix );
+
+        metrics->horiAdvance = FT_MulFix( metrics->horiAdvance,
+                                          font_matrix.xx );
+        metrics->vertAdvance = FT_MulFix( metrics->vertAdvance,
+                                          font_matrix.yy );
+      }
+
+      if ( font_offset.x || font_offset.y )
+      {
+        FT_Outline_Translate( &cidglyph->outline,
+                              font_offset.x,
+                              font_offset.y );
+
+        metrics->horiAdvance += font_offset.x;
+        metrics->vertAdvance += font_offset.y;
+      }
+
+      if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
+      {
+        /* scale the outline and the metrics */
+        FT_Int       n;
+        FT_Outline*  cur = decoder.builder.base;
+        FT_Vector*   vec = cur->points;
+        FT_Fixed     x_scale = glyph->x_scale;
+        FT_Fixed     y_scale = glyph->y_scale;
+
+
+        /* First of all, scale the points */
+        if ( !hinting || !decoder.builder.hints_funcs )
+          for ( n = cur->n_points; n > 0; n--, vec++ )
+          {
+            vec->x = FT_MulFix( vec->x, x_scale );
+            vec->y = FT_MulFix( vec->y, y_scale );
+          }
+
+        /* Then scale the metrics */
+        metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
+        metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
+      }
+
+      /* compute the other metrics */
+      FT_Outline_Get_CBox( &cidglyph->outline, &cbox );
+
+      metrics->width  = cbox.xMax - cbox.xMin;
+      metrics->height = cbox.yMax - cbox.yMin;
+
+      metrics->horiBearingX = cbox.xMin;
+      metrics->horiBearingY = cbox.yMax;
+
+      if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
+      {
+        /* make up vertical ones */
+        ft_synthesize_vertical_metrics( metrics,
+                                        metrics->vertAdvance );
+      }
+    }
+
+  Exit:
+    return error;
+  }
+
+
+/* END */