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Diffstat (limited to 'src/3rdparty/freetype/src/pcf/pcfread.c')
-rw-r--r--src/3rdparty/freetype/src/pcf/pcfread.c260
1 files changed, 166 insertions, 94 deletions
diff --git a/src/3rdparty/freetype/src/pcf/pcfread.c b/src/3rdparty/freetype/src/pcf/pcfread.c
index 08becf99ce..a29a9e371b 100644
--- a/src/3rdparty/freetype/src/pcf/pcfread.c
+++ b/src/3rdparty/freetype/src/pcf/pcfread.c
@@ -2,7 +2,7 @@
FreeType font driver for pcf fonts
- Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by
+ Copyright 2000-2010, 2012-2014 by
Francesco Zappa Nardelli
Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -78,7 +78,7 @@ THE SOFTWARE.
FT_FRAME_START( 16 ),
FT_FRAME_ULONG_LE( type ),
FT_FRAME_ULONG_LE( format ),
- FT_FRAME_ULONG_LE( size ),
+ FT_FRAME_ULONG_LE( size ), /* rounded up to a multiple of 4 */
FT_FRAME_ULONG_LE( offset ),
FT_FRAME_END
};
@@ -92,21 +92,23 @@ THE SOFTWARE.
PCF_Toc toc = &face->toc;
PCF_Table tables;
- FT_Memory memory = FT_FACE(face)->memory;
+ FT_Memory memory = FT_FACE( face )->memory;
FT_UInt n;
+ FT_ULong size;
- if ( FT_STREAM_SEEK ( 0 ) ||
- FT_STREAM_READ_FIELDS ( pcf_toc_header, toc ) )
- return PCF_Err_Cannot_Open_Resource;
+
+ if ( FT_STREAM_SEEK( 0 ) ||
+ FT_STREAM_READ_FIELDS( pcf_toc_header, toc ) )
+ return FT_THROW( Cannot_Open_Resource );
if ( toc->version != PCF_FILE_VERSION ||
toc->count > FT_ARRAY_MAX( face->toc.tables ) ||
toc->count == 0 )
- return PCF_Err_Invalid_File_Format;
+ return FT_THROW( Invalid_File_Format );
if ( FT_NEW_ARRAY( face->toc.tables, toc->count ) )
- return PCF_Err_Out_Of_Memory;
+ return FT_THROW( Out_Of_Memory );
tables = face->toc.tables;
for ( n = 0; n < toc->count; n++ )
@@ -144,13 +146,62 @@ THE SOFTWARE.
if ( ( tables[i].size > tables[i + 1].offset ) ||
( tables[i].offset > tables[i + 1].offset - tables[i].size ) )
- return PCF_Err_Invalid_Offset;
+ {
+ error = FT_THROW( Invalid_Offset );
+ goto Exit;
+ }
}
if ( !have_change )
break;
}
+ /*
+ * We now check whether the `size' and `offset' values are reasonable:
+ * `offset' + `size' must not exceed the stream size.
+ *
+ * Note, however, that X11's `pcfWriteFont' routine (used by the
+ * `bdftopcf' program to create PDF font files) has two special
+ * features.
+ *
+ * - It always assigns the accelerator table a size of 100 bytes in the
+ * TOC, regardless of its real size, which can vary between 34 and 72
+ * bytes.
+ *
+ * - Due to the way the routine is designed, it ships out the last font
+ * table with its real size, ignoring the TOC's size value. Since
+ * the TOC size values are always rounded up to a multiple of 4, the
+ * difference can be up to three bytes for all tables except the
+ * accelerator table, for which the difference can be as large as 66
+ * bytes.
+ *
+ */
+
+ tables = face->toc.tables;
+ size = stream->size;
+
+ for ( n = 0; n < toc->count - 1; n++ )
+ {
+ /* we need two checks to avoid overflow */
+ if ( ( tables->size > size ) ||
+ ( tables->offset > size - tables->size ) )
+ {
+ error = FT_THROW( Invalid_Table );
+ goto Exit;
+ }
+ tables++;
+ }
+
+ /* only check `tables->offset' for last table element ... */
+ if ( ( tables->offset > size ) )
+ {
+ error = FT_THROW( Invalid_Table );
+ goto Exit;
+ }
+ /* ... and adjust `tables->size' to the real value if necessary */
+ if ( tables->size > size - tables->offset )
+ tables->size = size - tables->offset;
+
#ifdef FT_DEBUG_LEVEL_TRACE
{
@@ -181,7 +232,7 @@ THE SOFTWARE.
#endif
- return PCF_Err_Ok;
+ return FT_Err_Ok;
Exit:
FT_FREE( face->toc.tables );
@@ -248,7 +299,7 @@ THE SOFTWARE.
FT_ULong format,
PCF_Metric metric )
{
- FT_Error error = PCF_Err_Ok;
+ FT_Error error = FT_Err_Ok;
if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
@@ -294,7 +345,7 @@ THE SOFTWARE.
FT_ULong *aformat,
FT_ULong *asize )
{
- FT_Error error = PCF_Err_Invalid_File_Format;
+ FT_Error error = FT_ERR( Invalid_File_Format );
FT_ULong i;
@@ -303,20 +354,20 @@ THE SOFTWARE.
{
if ( stream->pos > tables[i].offset )
{
- error = PCF_Err_Invalid_Stream_Skip;
+ error = FT_THROW( Invalid_Stream_Skip );
goto Fail;
}
if ( FT_STREAM_SKIP( tables[i].offset - stream->pos ) )
{
- error = PCF_Err_Invalid_Stream_Skip;
+ error = FT_THROW( Invalid_Stream_Skip );
goto Fail;
}
*asize = tables[i].size;
*aformat = tables[i].format;
- return PCF_Err_Ok;
+ return FT_Err_Ok;
}
Fail:
@@ -398,11 +449,11 @@ THE SOFTWARE.
PCF_Face face )
{
PCF_ParseProperty props = 0;
- PCF_Property properties;
+ PCF_Property properties = NULL;
FT_ULong nprops, i;
FT_ULong format, size;
FT_Error error;
- FT_Memory memory = FT_FACE(face)->memory;
+ FT_Memory memory = FT_FACE( face )->memory;
FT_ULong string_size;
FT_String* strings = 0;
@@ -441,7 +492,7 @@ THE SOFTWARE.
/* rough estimate */
if ( nprops > size / PCF_PROPERTY_SIZE )
{
- error = PCF_Err_Invalid_Table;
+ error = FT_THROW( Invalid_Table );
goto Bail;
}
@@ -474,7 +525,7 @@ THE SOFTWARE.
i = 4 - ( nprops & 3 );
if ( FT_STREAM_SKIP( i ) )
{
- error = PCF_Err_Invalid_Stream_Skip;
+ error = FT_THROW( Invalid_Stream_Skip );
goto Bail;
}
}
@@ -491,11 +542,12 @@ THE SOFTWARE.
/* rough estimate */
if ( string_size > size - nprops * PCF_PROPERTY_SIZE )
{
- error = PCF_Err_Invalid_Table;
+ error = FT_THROW( Invalid_Table );
goto Bail;
}
- if ( FT_NEW_ARRAY( strings, string_size ) )
+ /* allocate one more byte so that we have a final null byte */
+ if ( FT_NEW_ARRAY( strings, string_size + 1 ) )
goto Bail;
error = FT_Stream_Read( stream, (FT_Byte*)strings, string_size );
@@ -515,7 +567,7 @@ THE SOFTWARE.
if ( ( name_offset < 0 ) ||
( (FT_ULong)name_offset > string_size ) )
{
- error = PCF_Err_Invalid_Offset;
+ error = FT_THROW( Invalid_Offset );
goto Bail;
}
@@ -534,7 +586,7 @@ THE SOFTWARE.
if ( ( value_offset < 0 ) ||
( (FT_ULong)value_offset > string_size ) )
{
- error = PCF_Err_Invalid_Offset;
+ error = FT_THROW( Invalid_Offset );
goto Bail;
}
@@ -551,7 +603,7 @@ THE SOFTWARE.
}
}
- error = PCF_Err_Ok;
+ error = FT_Err_Ok;
Bail:
FT_FREE( props );
@@ -565,10 +617,10 @@ THE SOFTWARE.
pcf_get_metrics( FT_Stream stream,
PCF_Face face )
{
- FT_Error error = PCF_Err_Ok;
- FT_Memory memory = FT_FACE(face)->memory;
+ FT_Error error;
+ FT_Memory memory = FT_FACE( face )->memory;
FT_ULong format, size;
- PCF_Metric metrics = 0;
+ PCF_Metric metrics = 0;
FT_ULong nmetrics, i;
@@ -586,7 +638,7 @@ THE SOFTWARE.
if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) &&
!PCF_FORMAT_MATCH( format, PCF_COMPRESSED_METRICS ) )
- return PCF_Err_Invalid_File_Format;
+ return FT_THROW( Invalid_File_Format );
if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
{
@@ -603,10 +655,13 @@ THE SOFTWARE.
(void)FT_READ_USHORT_LE( nmetrics );
}
if ( error )
- return PCF_Err_Invalid_File_Format;
+ return FT_THROW( Invalid_File_Format );
face->nmetrics = nmetrics;
+ if ( !nmetrics )
+ return FT_THROW( Invalid_Table );
+
FT_TRACE4(( "pcf_get_metrics:\n" ));
FT_TRACE4(( " number of metrics: %d\n", nmetrics ));
@@ -615,36 +670,52 @@ THE SOFTWARE.
if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
{
if ( nmetrics > size / PCF_METRIC_SIZE )
- return PCF_Err_Invalid_Table;
+ return FT_THROW( Invalid_Table );
}
else
{
if ( nmetrics > size / PCF_COMPRESSED_METRIC_SIZE )
- return PCF_Err_Invalid_Table;
+ return FT_THROW( Invalid_Table );
}
if ( FT_NEW_ARRAY( face->metrics, nmetrics ) )
- return PCF_Err_Out_Of_Memory;
+ return FT_THROW( Out_Of_Memory );
metrics = face->metrics;
- for ( i = 0; i < nmetrics; i++ )
+ for ( i = 0; i < nmetrics; i++, metrics++ )
{
- error = pcf_get_metric( stream, format, metrics + i );
+ error = pcf_get_metric( stream, format, metrics );
- metrics[i].bits = 0;
+ metrics->bits = 0;
FT_TRACE5(( " idx %d: width=%d, "
"lsb=%d, rsb=%d, ascent=%d, descent=%d, swidth=%d\n",
i,
- ( metrics + i )->characterWidth,
- ( metrics + i )->leftSideBearing,
- ( metrics + i )->rightSideBearing,
- ( metrics + i )->ascent,
- ( metrics + i )->descent,
- ( metrics + i )->attributes ));
+ metrics->characterWidth,
+ metrics->leftSideBearing,
+ metrics->rightSideBearing,
+ metrics->ascent,
+ metrics->descent,
+ metrics->attributes ));
if ( error )
break;
+
+ /* sanity checks -- those values are used in `PCF_Glyph_Load' to */
+ /* compute a glyph's bitmap dimensions, thus setting them to zero in */
+ /* case of an error disables this particular glyph only */
+ if ( metrics->rightSideBearing < metrics->leftSideBearing ||
+ metrics->ascent + metrics->descent < 0 )
+ {
+ metrics->characterWidth = 0;
+ metrics->leftSideBearing = 0;
+ metrics->rightSideBearing = 0;
+ metrics->ascent = 0;
+ metrics->descent = 0;
+
+ FT_TRACE0(( "pcf_get_metrics:"
+ " invalid metrics for glyph %d\n", i ));
+ }
}
if ( error )
@@ -659,9 +730,9 @@ THE SOFTWARE.
pcf_get_bitmaps( FT_Stream stream,
PCF_Face face )
{
- FT_Error error = PCF_Err_Ok;
- FT_Memory memory = FT_FACE(face)->memory;
- FT_Long* offsets;
+ FT_Error error;
+ FT_Memory memory = FT_FACE( face )->memory;
+ FT_Long* offsets = NULL;
FT_Long bitmapSizes[GLYPHPADOPTIONS];
FT_ULong format, size;
FT_ULong nbitmaps, i, sizebitmaps = 0;
@@ -689,15 +760,15 @@ THE SOFTWARE.
FT_Stream_ExitFrame( stream );
if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
- return PCF_Err_Invalid_File_Format;
+ return FT_THROW( Invalid_File_Format );
FT_TRACE4(( "pcf_get_bitmaps:\n" ));
FT_TRACE4(( " number of bitmaps: %d\n", nbitmaps ));
- /* XXX: PCF_Face->nmetrics is singed FT_Long, see pcf.h */
- if ( face->nmetrics < 0 || nbitmaps != ( FT_ULong )face->nmetrics )
- return PCF_Err_Invalid_File_Format;
+ /* XXX: PCF_Face->nmetrics is signed FT_Long, see pcf.h */
+ if ( face->nmetrics < 0 || nbitmaps != (FT_ULong)face->nmetrics )
+ return FT_THROW( Invalid_File_Format );
if ( FT_NEW_ARRAY( offsets, nbitmaps ) )
return error;
@@ -761,14 +832,14 @@ THE SOFTWARE.
pcf_get_encodings( FT_Stream stream,
PCF_Face face )
{
- FT_Error error = PCF_Err_Ok;
- FT_Memory memory = FT_FACE(face)->memory;
+ FT_Error error;
+ FT_Memory memory = FT_FACE( face )->memory;
FT_ULong format, size;
int firstCol, lastCol;
int firstRow, lastRow;
int nencoding, encodingOffset;
- int i, j;
- PCF_Encoding tmpEncoding, encoding = 0;
+ int i, j, k;
+ PCF_Encoding encoding = NULL;
error = pcf_seek_to_table_type( stream,
@@ -806,7 +877,16 @@ THE SOFTWARE.
FT_Stream_ExitFrame( stream );
if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) )
- return PCF_Err_Invalid_File_Format;
+ return FT_THROW( Invalid_File_Format );
+
+ /* sanity checks */
+ if ( firstCol < 0 ||
+ firstCol > lastCol ||
+ lastCol > 0xFF ||
+ firstRow < 0 ||
+ firstRow > lastRow ||
+ lastRow > 0xFF )
+ return FT_THROW( Invalid_Table );
FT_TRACE4(( "pdf_get_encodings:\n" ));
@@ -815,56 +895,47 @@ THE SOFTWARE.
nencoding = ( lastCol - firstCol + 1 ) * ( lastRow - firstRow + 1 );
- if ( FT_NEW_ARRAY( tmpEncoding, nencoding ) )
- return PCF_Err_Out_Of_Memory;
+ if ( FT_NEW_ARRAY( encoding, nencoding ) )
+ return FT_THROW( Out_Of_Memory );
error = FT_Stream_EnterFrame( stream, 2 * nencoding );
if ( error )
goto Bail;
- for ( i = 0, j = 0 ; i < nencoding; i++ )
+ k = 0;
+ for ( i = firstRow; i <= lastRow; i++ )
{
- if ( PCF_BYTE_ORDER( format ) == MSBFirst )
- encodingOffset = FT_GET_SHORT();
- else
- encodingOffset = FT_GET_SHORT_LE();
-
- if ( encodingOffset != -1 )
+ for ( j = firstCol; j <= lastCol; j++ )
{
- tmpEncoding[j].enc = ( ( ( i / ( lastCol - firstCol + 1 ) ) +
- firstRow ) * 256 ) +
- ( ( i % ( lastCol - firstCol + 1 ) ) +
- firstCol );
+ if ( PCF_BYTE_ORDER( format ) == MSBFirst )
+ encodingOffset = FT_GET_SHORT();
+ else
+ encodingOffset = FT_GET_SHORT_LE();
- tmpEncoding[j].glyph = (FT_Short)encodingOffset;
+ if ( encodingOffset != -1 )
+ {
+ encoding[k].enc = i * 256 + j;
+ encoding[k].glyph = (FT_Short)encodingOffset;
- FT_TRACE5(( " code %d (0x%04X): idx %d\n",
- tmpEncoding[j].enc, tmpEncoding[j].enc,
- tmpEncoding[j].glyph ));
+ FT_TRACE5(( " code %d (0x%04X): idx %d\n",
+ encoding[k].enc, encoding[k].enc, encoding[k].glyph ));
- j++;
+ k++;
+ }
}
}
FT_Stream_ExitFrame( stream );
- if ( FT_NEW_ARRAY( encoding, j ) )
+ if ( FT_RENEW_ARRAY( encoding, nencoding, k ) )
goto Bail;
- for ( i = 0; i < j; i++ )
- {
- encoding[i].enc = tmpEncoding[i].enc;
- encoding[i].glyph = tmpEncoding[i].glyph;
- }
-
- face->nencodings = j;
+ face->nencodings = k;
face->encodings = encoding;
- FT_FREE( tmpEncoding );
return error;
Bail:
FT_FREE( encoding );
- FT_FREE( tmpEncoding );
return error;
}
@@ -919,7 +990,7 @@ THE SOFTWARE.
FT_ULong type )
{
FT_ULong format, size;
- FT_Error error = PCF_Err_Ok;
+ FT_Error error;
PCF_Accel accel = &face->accel;
@@ -990,7 +1061,7 @@ THE SOFTWARE.
static FT_Error
pcf_interpret_style( PCF_Face pcf )
{
- FT_Error error = PCF_Err_Ok;
+ FT_Error error = FT_Err_Ok;
FT_Face face = FT_FACE( pcf );
FT_Memory memory = face->memory;
@@ -1019,20 +1090,20 @@ THE SOFTWARE.
( *(prop->value.atom) == 'B' || *(prop->value.atom) == 'b' ) )
{
face->style_flags |= FT_STYLE_FLAG_BOLD;
- strings[1] = (char *)"Bold";
+ strings[1] = (char*)"Bold";
}
prop = pcf_find_property( pcf, "SETWIDTH_NAME" );
if ( prop && prop->isString &&
*(prop->value.atom) &&
!( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) )
- strings[3] = (char *)(prop->value.atom);
+ strings[3] = (char*)( prop->value.atom );
prop = pcf_find_property( pcf, "ADD_STYLE_NAME" );
if ( prop && prop->isString &&
*(prop->value.atom) &&
!( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) )
- strings[0] = (char *)(prop->value.atom);
+ strings[0] = (char*)( prop->value.atom );
for ( len = 0, nn = 0; nn < 4; nn++ )
{
@@ -1046,7 +1117,7 @@ THE SOFTWARE.
if ( len == 0 )
{
- strings[0] = (char *)"Regular";
+ strings[0] = (char*)"Regular";
lengths[0] = ft_strlen( strings[0] );
len = lengths[0] + 1;
}
@@ -1084,7 +1155,7 @@ THE SOFTWARE.
for ( mm = 0; mm < len; mm++ )
- if (s[mm] == ' ')
+ if ( s[mm] == ' ' )
s[mm] = '-';
}
@@ -1101,8 +1172,8 @@ THE SOFTWARE.
pcf_load_font( FT_Stream stream,
PCF_Face face )
{
- FT_Error error = PCF_Err_Ok;
- FT_Memory memory = FT_FACE(face)->memory;
+ FT_Error error;
+ FT_Memory memory = FT_FACE( face )->memory;
FT_Bool hasBDFAccelerators;
@@ -1158,9 +1229,10 @@ THE SOFTWARE.
root->num_faces = 1;
root->face_index = 0;
- root->face_flags = FT_FACE_FLAG_FIXED_SIZES |
- FT_FACE_FLAG_HORIZONTAL |
- FT_FACE_FLAG_FAST_GLYPHS;
+
+ root->face_flags |= FT_FACE_FLAG_FIXED_SIZES |
+ FT_FACE_FLAG_HORIZONTAL |
+ FT_FACE_FLAG_FAST_GLYPHS;
if ( face->accel.constantWidth )
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
@@ -1264,7 +1336,7 @@ THE SOFTWARE.
{
/* This is done to respect the behaviour of the original */
/* PCF font driver. */
- error = PCF_Err_Invalid_File_Format;
+ error = FT_THROW( Invalid_File_Format );
}
return error;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 09:45:44 +0000