Commit f3e71bab9ed0caefda8bddec8af36c0485870c08
2016-08-26T10:31:30
[sfnt] Cache offset and size to bitmap data table. This commit avoids `EBDT' and friends being looked up again and again while loading a single embedded bitmap. * include/freetype/internal/tttypes.h (TT_FaceRec) [TT_CONFIG_OPTION_EMBEDDED_BITMAPS]: New fields `ebdt_start' and `ebdt_size'. * src/sfnt/ttsbit.c (tt_sbit_decoder_init): Move table lookup to ... (tt_face_load_sbit): ... this function; also store the table size and offset.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105
diff --git a/ChangeLog b/ChangeLog
index 8b1e97a..3ee8b58 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2016-08-26 Werner Lemberg <wl@gnu.org>
+
+ [sfnt] Cache offset and size to bitmap data table.
+
+ This commit avoids `EBDT' and friends being looked up again and
+ again while loading a single embedded bitmap.
+
+ * include/freetype/internal/tttypes.h (TT_FaceRec)
+ [TT_CONFIG_OPTION_EMBEDDED_BITMAPS]: New fields `ebdt_start' and
+ `ebdt_size'.
+
+ * src/sfnt/ttsbit.c (tt_sbit_decoder_init): Move table lookup to ...
+ (tt_face_load_sbit): ... this function; also store the table size
+ and offset.
+
2016-08-26 Alexei Podtelezhnikov <apodtele@gmail.com>
* src/smooth/ftgrays.c (gray_raster_render): Minor tweaks.
diff --git a/include/freetype/internal/tttypes.h b/include/freetype/internal/tttypes.h
index 4110d50..4ed980b 100644
--- a/include/freetype/internal/tttypes.h
+++ b/include/freetype/internal/tttypes.h
@@ -1393,6 +1393,12 @@ FT_BEGIN_HEADER
FT_Bool sph_compatibility_mode;
#endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */
+#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
+ /* since 2.7 */
+ FT_ULong ebdt_start; /* either `CBDT', `EBDT', or `bdat' */
+ FT_ULong ebdt_size;
+#endif
+
} TT_FaceRec;
diff --git a/src/sfnt/ttsbit.c b/src/sfnt/ttsbit.c
index 82c8544..5b7a123 100644
--- a/src/sfnt/ttsbit.c
+++ b/src/sfnt/ttsbit.c
@@ -197,6 +197,27 @@
if ( !error )
FT_TRACE3(( "sbit_num_strikes: %u\n", face->sbit_num_strikes ));
+ face->ebdt_start = 0;
+ face->ebdt_size = 0;
+
+ if ( face->sbit_table_type != TT_SBIT_TABLE_TYPE_NONE )
+ {
+ FT_ULong ebdt_size;
+
+
+ error = face->goto_table( face, TTAG_CBDT, stream, &ebdt_size );
+ if ( error )
+ error = face->goto_table( face, TTAG_EBDT, stream, &ebdt_size );
+ if ( error )
+ error = face->goto_table( face, TTAG_bdat, stream, &ebdt_size );
+
+ if ( !error )
+ {
+ face->ebdt_start = FT_STREAM_POS();
+ face->ebdt_size = ebdt_size;
+ }
+ }
+
return FT_Err_Ok;
Exit:
@@ -424,17 +445,13 @@
FT_ULong strike_index,
TT_SBit_MetricsRec* metrics )
{
- FT_Error error;
+ FT_Error error = FT_ERR( Table_Missing );
FT_Stream stream = face->root.stream;
- FT_ULong ebdt_size;
- error = face->goto_table( face, TTAG_CBDT, stream, &ebdt_size );
- if ( error )
- error = face->goto_table( face, TTAG_EBDT, stream, &ebdt_size );
- if ( error )
- error = face->goto_table( face, TTAG_bdat, stream, &ebdt_size );
- if ( error )
+ if ( !face->ebdt_size )
+ goto Exit;
+ if ( FT_STREAM_SEEK( face->ebdt_start ) )
goto Exit;
decoder->face = face;
@@ -445,8 +462,8 @@
decoder->metrics_loaded = 0;
decoder->bitmap_allocated = 0;
- decoder->ebdt_start = FT_STREAM_POS();
- decoder->ebdt_size = ebdt_size;
+ decoder->ebdt_start = face->ebdt_start;
+ decoder->ebdt_size = face->ebdt_size;
decoder->eblc_base = face->sbit_table;
decoder->eblc_limit = face->sbit_table + face->sbit_table_size;