-/***************************************************************************/
-/* */
-/* ttpload.c */
-/* */
-/* TrueType-specific tables loader (body). */
-/* */
-/* Copyright 1996-2002, 2004-2012 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 FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_OBJECTS_H
-#include FT_INTERNAL_STREAM_H
-#include FT_TRUETYPE_TAGS_H
+/****************************************************************************
+ *
+ * ttpload.c
+ *
+ * TrueType-specific tables loader (body).
+ *
+ * Copyright (C) 1996-2023 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 <freetype/internal/ftdebug.h>
+#include <freetype/internal/ftobjs.h>
+#include <freetype/internal/ftstream.h>
+#include <freetype/tttags.h>
#include "ttpload.h"
#include "tterrors.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. */
- /* */
+ /**************************************************************************
+ *
+ * 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_ttpload
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_loca */
- /* */
- /* <Description> */
- /* Load the locations table. */
- /* */
- /* <InOut> */
- /* face :: A handle to the target face object. */
- /* */
- /* <Input> */
- /* stream :: The input stream. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
+#define FT_COMPONENT ttpload
+
+
+ /**************************************************************************
+ *
+ * @Function:
+ * tt_face_load_loca
+ *
+ * @Description:
+ * Load the locations table.
+ *
+ * @InOut:
+ * face ::
+ * A handle to the target face object.
+ *
+ * @Input:
+ * stream ::
+ * The input stream.
+ *
+ * @Return:
+ * FreeType error code. 0 means success.
+ */
FT_LOCAL_DEF( FT_Error )
tt_face_load_loca( TT_Face face,
FT_Stream stream )
/* it is possible that a font doesn't have a glyf table at all */
/* or its size is zero */
- if ( error == TT_Err_Table_Missing )
- face->glyf_len = 0;
+ if ( FT_ERR_EQ( error, Table_Missing ) )
+ {
+ face->glyf_len = 0;
+ face->glyf_offset = 0;
+ }
else if ( error )
goto Exit;
+ else
+ {
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+ if ( face->root.internal->incremental_interface )
+ face->glyf_offset = 0;
+ else
+#endif
+ face->glyf_offset = FT_STREAM_POS();
+ }
FT_TRACE2(( "Locations " ));
error = face->goto_table( face, TTAG_loca, stream, &table_len );
if ( error )
{
- error = TT_Err_Locations_Missing;
+ error = FT_THROW( Locations_Missing );
goto Exit;
}
- if ( face->header.Index_To_Loc_Format != 0 )
- {
- shift = 2;
+ shift = face->header.Index_To_Loc_Format != 0 ? 2 : 1;
- if ( table_len >= 0x40000L )
- {
- FT_TRACE2(( "table too large\n" ));
- error = TT_Err_Invalid_Table;
- goto Exit;
- }
- face->num_locations = table_len >> shift;
- }
- else
+ if ( table_len > 0x10000UL << shift )
{
- shift = 1;
-
- if ( table_len >= 0x20000L )
- {
- FT_TRACE2(( "table too large\n" ));
- error = TT_Err_Invalid_Table;
- goto Exit;
- }
- face->num_locations = table_len >> shift;
+ FT_TRACE2(( "table too large\n" ));
+ table_len = 0x10000UL << shift;
}
+ face->num_locations = table_len >> shift;
+
if ( face->num_locations != (FT_ULong)face->root.num_glyphs + 1 )
{
- FT_TRACE2(( "glyph count mismatch! loca: %d, maxp: %d\n",
+ FT_TRACE2(( "glyph count mismatch! loca: %ld, maxp: %ld\n",
face->num_locations - 1, face->root.num_glyphs ));
/* we only handle the case where `maxp' gives a larger value */
- if ( face->num_locations <= (FT_ULong)face->root.num_glyphs )
+ if ( face->num_locations < (FT_ULong)face->root.num_glyphs + 1 )
{
- FT_Long new_loca_len =
- ( (FT_Long)( face->root.num_glyphs ) + 1 ) << shift;
+ FT_ULong new_loca_len =
+ ( (FT_ULong)face->root.num_glyphs + 1 ) << shift;
TT_Table entry = face->dir_tables;
TT_Table limit = entry + face->num_tables;
- FT_Long pos = FT_Stream_Pos( stream );
- FT_Long dist = 0x7FFFFFFFL;
+ FT_Long pos = (FT_Long)FT_STREAM_POS();
+ FT_Long dist = 0x7FFFFFFFL;
+ FT_Bool found = 0;
/* compute the distance to next table in font file */
for ( ; entry < limit; entry++ )
{
- FT_Long diff = entry->Offset - pos;
+ FT_Long diff = (FT_Long)entry->Offset - pos;
if ( diff > 0 && diff < dist )
- dist = diff;
+ {
+ dist = diff;
+ found = 1;
+ }
}
- if ( entry == limit )
+ if ( !found )
{
/* `loca' is the last table */
- dist = stream->size - pos;
+ dist = (FT_Long)stream->size - pos;
}
- if ( new_loca_len <= dist )
+ if ( new_loca_len <= (FT_ULong)dist )
{
- face->num_locations = face->root.num_glyphs + 1;
+ face->num_locations = (FT_ULong)face->root.num_glyphs + 1;
table_len = new_loca_len;
- FT_TRACE2(( "adjusting num_locations to %d\n",
+ FT_TRACE2(( "adjusting num_locations to %ld\n",
face->num_locations ));
}
+ else
+ {
+ face->root.num_glyphs = face->num_locations
+ ? (FT_Long)face->num_locations - 1 : 0;
+
+ FT_TRACE2(( "adjusting num_glyphs to %ld\n",
+ face->root.num_glyphs ));
+ }
}
}
FT_LOCAL_DEF( FT_ULong )
- tt_face_get_location( TT_Face face,
- FT_UInt gindex,
- FT_UInt *asize )
+ tt_face_get_location( FT_Face face, /* TT_Face */
+ FT_UInt gindex,
+ FT_ULong *asize )
{
+ TT_Face ttface = (TT_Face)face;
FT_ULong pos1, pos2;
FT_Byte* p;
FT_Byte* p_limit;
pos1 = pos2 = 0;
- if ( gindex < face->num_locations )
+ if ( gindex < ttface->num_locations )
{
- if ( face->header.Index_To_Loc_Format != 0 )
+ if ( ttface->header.Index_To_Loc_Format != 0 )
{
- p = face->glyph_locations + gindex * 4;
- p_limit = face->glyph_locations + face->num_locations * 4;
+ p = ttface->glyph_locations + gindex * 4;
+ p_limit = ttface->glyph_locations + ttface->num_locations * 4;
pos1 = FT_NEXT_ULONG( p );
pos2 = pos1;
}
else
{
- p = face->glyph_locations + gindex * 2;
- p_limit = face->glyph_locations + face->num_locations * 2;
+ p = ttface->glyph_locations + gindex * 2;
+ p_limit = ttface->glyph_locations + ttface->num_locations * 2;
pos1 = FT_NEXT_USHORT( p );
pos2 = pos1;
}
}
- /* Check broken location data */
- if ( pos1 > face->glyf_len )
+ /* Check broken location data. */
+ if ( pos1 > ttface->glyf_len )
{
FT_TRACE1(( "tt_face_get_location:"
- " too large offset=0x%08lx found for gid=0x%04lx,"
- " exceeding the end of glyf table (0x%08lx)\n",
- pos1, gindex, face->glyf_len ));
+ " too large offset (0x%08lx) found for glyph index %d,\n",
+ pos1, gindex ));
+ FT_TRACE1(( " "
+ " exceeding the end of `glyf' table (0x%08lx)\n",
+ ttface->glyf_len ));
*asize = 0;
return 0;
}
- if ( pos2 > face->glyf_len )
+ if ( pos2 > ttface->glyf_len )
{
- FT_TRACE1(( "tt_face_get_location:"
- " too large offset=0x%08lx found for gid=0x%04lx,"
- " truncate at the end of glyf table (0x%08lx)\n",
- pos2, gindex + 1, face->glyf_len ));
- pos2 = face->glyf_len;
+ /* We try to sanitize the last `loca' entry. */
+ if ( gindex == ttface->num_locations - 2 )
+ {
+ FT_TRACE1(( "tt_face_get_location:"
+ " too large size (%ld bytes) found for glyph index %d,\n",
+ pos2 - pos1, gindex ));
+ FT_TRACE1(( " "
+ " truncating at the end of `glyf' table to %ld bytes\n",
+ ttface->glyf_len - pos1 ));
+ pos2 = ttface->glyf_len;
+ }
+ else
+ {
+ FT_TRACE1(( "tt_face_get_location:"
+ " too large offset (0x%08lx) found for glyph index %d,\n",
+ pos2, gindex + 1 ));
+ FT_TRACE1(( " "
+ " exceeding the end of `glyf' table (0x%08lx)\n",
+ ttface->glyf_len ));
+ *asize = 0;
+ return 0;
+ }
}
/* The `loca' table must be ordered; it refers to the length of */
/* We get (intentionally) a wrong, non-zero result in case the */
/* `glyf' table is missing. */
if ( pos2 >= pos1 )
- *asize = (FT_UInt)( pos2 - pos1 );
+ *asize = (FT_ULong)( pos2 - pos1 );
else
- *asize = (FT_UInt)( face->glyf_len - pos1 );
+ *asize = (FT_ULong)( ttface->glyf_len - pos1 );
return pos1;
}
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_cvt */
- /* */
- /* <Description> */
- /* Load the control value table into a face object. */
- /* */
- /* <InOut> */
- /* face :: A handle to the target face object. */
- /* */
- /* <Input> */
- /* stream :: A handle to the input stream. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
+ /**************************************************************************
+ *
+ * @Function:
+ * tt_face_load_cvt
+ *
+ * @Description:
+ * Load the control value table into a face object.
+ *
+ * @InOut:
+ * face ::
+ * A handle to the target face object.
+ *
+ * @Input:
+ * stream ::
+ * A handle to the input stream.
+ *
+ * @Return:
+ * FreeType error code. 0 means success.
+ */
FT_LOCAL_DEF( FT_Error )
tt_face_load_cvt( TT_Face face,
FT_Stream stream )
face->cvt_size = 0;
face->cvt = NULL;
- error = TT_Err_Ok;
+ error = FT_Err_Ok;
goto Exit;
}
face->cvt_size = table_len / 2;
- if ( FT_NEW_ARRAY( face->cvt, face->cvt_size ) )
+ if ( FT_QNEW_ARRAY( face->cvt, face->cvt_size ) )
goto Exit;
if ( FT_FRAME_ENTER( face->cvt_size * 2L ) )
goto Exit;
{
- FT_Short* cur = face->cvt;
- FT_Short* limit = cur + face->cvt_size;
+ FT_Int32* cur = face->cvt;
+ FT_Int32* limit = cur + face->cvt_size;
for ( ; cur < limit; cur++ )
- *cur = FT_GET_SHORT();
+ *cur = FT_GET_SHORT() * 64;
}
FT_FRAME_EXIT();
FT_UNUSED( face );
FT_UNUSED( stream );
- return TT_Err_Ok;
+ return FT_Err_Ok;
#endif
}
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_fpgm */
- /* */
- /* <Description> */
- /* Load the font program. */
- /* */
- /* <InOut> */
- /* face :: A handle to the target face object. */
- /* */
- /* <Input> */
- /* stream :: A handle to the input stream. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
+ /**************************************************************************
+ *
+ * @Function:
+ * tt_face_load_fpgm
+ *
+ * @Description:
+ * Load the font program.
+ *
+ * @InOut:
+ * face ::
+ * A handle to the target face object.
+ *
+ * @Input:
+ * stream ::
+ * A handle to the input stream.
+ *
+ * @Return:
+ * FreeType error code. 0 means success.
+ */
FT_LOCAL_DEF( FT_Error )
tt_face_load_fpgm( TT_Face face,
FT_Stream stream )
{
face->font_program = NULL;
face->font_program_size = 0;
- error = TT_Err_Ok;
+ error = FT_Err_Ok;
FT_TRACE2(( "is missing\n" ));
}
if ( FT_FRAME_EXTRACT( table_len, face->font_program ) )
goto Exit;
- FT_TRACE2(( "loaded, %12d bytes\n", face->font_program_size ));
+ FT_TRACE2(( "loaded, %12ld bytes\n", face->font_program_size ));
}
Exit:
FT_UNUSED( face );
FT_UNUSED( stream );
- return TT_Err_Ok;
+ return FT_Err_Ok;
#endif
}
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_prep */
- /* */
- /* <Description> */
- /* Load the cvt program. */
- /* */
- /* <InOut> */
- /* face :: A handle to the target face object. */
- /* */
- /* <Input> */
- /* stream :: A handle to the input stream. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
+ /**************************************************************************
+ *
+ * @Function:
+ * tt_face_load_prep
+ *
+ * @Description:
+ * Load the cvt program.
+ *
+ * @InOut:
+ * face ::
+ * A handle to the target face object.
+ *
+ * @Input:
+ * stream ::
+ * A handle to the input stream.
+ *
+ * @Return:
+ * FreeType error code. 0 means success.
+ */
FT_LOCAL_DEF( FT_Error )
tt_face_load_prep( TT_Face face,
FT_Stream stream )
{
face->cvt_program = NULL;
face->cvt_program_size = 0;
- error = TT_Err_Ok;
+ error = FT_Err_Ok;
FT_TRACE2(( "is missing\n" ));
}
if ( FT_FRAME_EXTRACT( table_len, face->cvt_program ) )
goto Exit;
- FT_TRACE2(( "loaded, %12d bytes\n", face->cvt_program_size ));
+ FT_TRACE2(( "loaded, %12ld bytes\n", face->cvt_program_size ));
}
Exit:
FT_UNUSED( face );
FT_UNUSED( stream );
- return TT_Err_Ok;
+ return FT_Err_Ok;
#endif
}
- /*************************************************************************/
- /* */
- /* <Function> */
- /* tt_face_load_hdmx */
- /* */
- /* <Description> */
- /* Load the `hdmx' table into the face object. */
- /* */
- /* <Input> */
- /* face :: A handle to the target face object. */
- /* */
- /* stream :: A handle to the input stream. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
+ FT_COMPARE_DEF( int )
+ compare_ppem( const void* a,
+ const void* b )
+ {
+ return **(FT_Byte**)a - **(FT_Byte**)b;
+ }
+
+
+ /**************************************************************************
+ *
+ * @Function:
+ * tt_face_load_hdmx
+ *
+ * @Description:
+ * Load the `hdmx' table into the face object.
+ *
+ * @Input:
+ * face ::
+ * A handle to the target face object.
+ *
+ * stream ::
+ * A handle to the input stream.
+ *
+ * @Return:
+ * FreeType error code. 0 means success.
+ */
FT_LOCAL_DEF( FT_Error )
tt_face_load_hdmx( TT_Face face,
{
FT_Error error;
FT_Memory memory = stream->memory;
- FT_UInt version, nn, num_records;
+ FT_UInt nn, num_records;
FT_ULong table_size, record_size;
FT_Byte* p;
FT_Byte* limit;
/* this table is optional */
error = face->goto_table( face, TTAG_hdmx, stream, &table_size );
if ( error || table_size < 8 )
- return TT_Err_Ok;
+ return FT_Err_Ok;
if ( FT_FRAME_EXTRACT( table_size, face->hdmx_table ) )
goto Exit;
p = face->hdmx_table;
limit = p + table_size;
- version = FT_NEXT_USHORT( p );
+ /* Given that `hdmx' tables are losing its importance (for example, */
+ /* variation fonts introduced in OpenType 1.8 must not have this */
+ /* table) we no longer test for a correct `version' field. */
+ p += 2;
num_records = FT_NEXT_USHORT( p );
record_size = FT_NEXT_ULONG( p );
- /* The maximum number of bytes in an hdmx device record is the */
- /* maximum number of glyphs + 2; this is 0xFFFF + 2; this is */
- /* the reason why `record_size' is a long (which we read as */
- /* unsigned long for convenience). In practice, two bytes */
- /* sufficient to hold the size value. */
- /* */
/* There are at least two fonts, HANNOM-A and HANNOM-B version */
/* 2.0 (2005), which get this wrong: The upper two bytes of */
/* the size value are set to 0xFF instead of 0x00. We catch */
if ( record_size >= 0xFFFF0000UL )
record_size &= 0xFFFFU;
+ FT_TRACE2(( "Hdmx " ));
+
/* The limit for `num_records' is a heuristic value. */
+ if ( num_records > 255 || num_records == 0 )
+ {
+ FT_TRACE2(( "with unreasonable %u records rejected\n", num_records ));
+ goto Fail;
+ }
- if ( version != 0 || num_records > 255 || record_size > 0x10001L )
+ /* Out-of-spec tables are rejected. The record size must be */
+ /* equal to the number of glyphs + 2 + 32-bit padding. */
+ if ( (FT_Long)record_size != ( ( face->root.num_glyphs + 2 + 3 ) & ~3 ) )
{
- error = TT_Err_Invalid_File_Format;
+ FT_TRACE2(( "with record size off by %ld bytes rejected\n",
+ (FT_Long)record_size -
+ ( ( face->root.num_glyphs + 2 + 3 ) & ~3 ) ));
goto Fail;
}
- if ( FT_NEW_ARRAY( face->hdmx_record_sizes, num_records ) )
+ if ( FT_QNEW_ARRAY( face->hdmx_records, num_records ) )
goto Fail;
for ( nn = 0; nn < num_records; nn++ )
{
if ( p + record_size > limit )
break;
-
- face->hdmx_record_sizes[nn] = p[0];
- p += record_size;
+ face->hdmx_records[nn] = p;
+ p += record_size;
}
+ /* The records must be already sorted by ppem but it does not */
+ /* hurt to make sure so that the binary search works later. */
+ ft_qsort( face->hdmx_records, nn, sizeof ( FT_Byte* ), compare_ppem );
+
face->hdmx_record_count = nn;
face->hdmx_table_size = table_size;
face->hdmx_record_size = record_size;
+ FT_TRACE2(( "%ux%lu loaded\n", num_records, record_size ));
+
Exit:
return error;
FT_Memory memory = stream->memory;
- FT_FREE( face->hdmx_record_sizes );
+ FT_FREE( face->hdmx_records );
FT_FRAME_RELEASE( face->hdmx_table );
}
- /*************************************************************************/
- /* */
- /* Return the advance width table for a given pixel size if it is found */
- /* in the font's `hdmx' table (if any). */
- /* */
+ /**************************************************************************
+ *
+ * Return the advance width table for a given pixel size if it is found
+ * in the font's `hdmx' table (if any). The records must be sorted for
+ * the binary search to work properly.
+ */
FT_LOCAL_DEF( FT_Byte* )
tt_face_get_device_metrics( TT_Face face,
FT_UInt ppem,
FT_UInt gindex )
{
- FT_UInt nn;
- FT_Byte* result = NULL;
- FT_ULong record_size = face->hdmx_record_size;
- FT_Byte* record = face->hdmx_table + 8;
+ FT_UInt min = 0;
+ FT_UInt max = face->hdmx_record_count;
+ FT_UInt mid;
+ FT_Byte* result = NULL;
+
+ while ( min < max )
+ {
+ mid = ( min + max ) >> 1;
- for ( nn = 0; nn < face->hdmx_record_count; nn++ )
- if ( face->hdmx_record_sizes[nn] == ppem )
+ if ( face->hdmx_records[mid][0] > ppem )
+ max = mid;
+ else if ( face->hdmx_records[mid][0] < ppem )
+ min = mid + 1;
+ else
{
- gindex += 2;
- if ( gindex < record_size )
- result = record + nn * record_size + gindex;
+ result = face->hdmx_records[mid] + 2 + gindex;
break;
}
+ }
return result;
}
projects / platform / upstream / freetype2.git / blobdiff