diff options
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/src/sfnt/sfobjs.c')
-rw-r--r-- | Build/source/libs/freetype2/freetype-src/src/sfnt/sfobjs.c | 255 |
1 files changed, 147 insertions, 108 deletions
diff --git a/Build/source/libs/freetype2/freetype-src/src/sfnt/sfobjs.c b/Build/source/libs/freetype2/freetype-src/src/sfnt/sfobjs.c index 6ba8509f569..0b43d251b87 100644 --- a/Build/source/libs/freetype2/freetype-src/src/sfnt/sfobjs.c +++ b/Build/source/libs/freetype2/freetype-src/src/sfnt/sfobjs.c @@ -1,19 +1,19 @@ -/***************************************************************************/ -/* */ -/* sfobjs.c */ -/* */ -/* SFNT object management (base). */ -/* */ -/* Copyright 1996-2018 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. */ -/* */ -/***************************************************************************/ +/**************************************************************************** + * + * sfobjs.c + * + * SFNT object management (base). + * + * Copyright (C) 1996-2019 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> @@ -41,14 +41,14 @@ #endif - /*************************************************************************/ - /* */ - /* 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_sfobjs +#define FT_COMPONENT sfobjs @@ -918,7 +918,9 @@ /* Stream may have changed in sfnt_open_font. */ stream = face->root.stream; - FT_TRACE2(( "sfnt_init_face: %08p, %d\n", face, face_instance_index )); + FT_TRACE2(( "sfnt_init_face: %08p (index %d)\n", + face, + face_instance_index )); face_index = FT_ABS( face_instance_index ) & 0xFFFF; @@ -1001,15 +1003,15 @@ face->variation_support |= TT_FACE_FLAG_VAR_FVAR; /* - * As documented in the OpenType specification, an entry for the - * default instance may be omitted in the named instance table. In - * particular this means that even if there is no named instance - * table in the font we actually do have a named instance, namely the - * default instance. + * As documented in the OpenType specification, an entry for the + * default instance may be omitted in the named instance table. In + * particular this means that even if there is no named instance + * table in the font we actually do have a named instance, namely the + * default instance. * - * For consistency, we always want the default instance in our list - * of named instances. If it is missing, we try to synthesize it - * later on. Here, we have to adjust `num_instances' accordingly. + * For consistency, we always want the default instance in our list + * of named instances. If it is missing, we try to synthesize it + * later on. Here, we have to adjust `num_instances' accordingly. */ if ( ( face->variation_support & TT_FACE_FLAG_VAR_FVAR ) && @@ -1341,6 +1343,13 @@ if ( sfnt->load_eblc ) LOAD_( eblc ); + /* colored glyph support */ + if ( sfnt->load_cpal ) + { + LOAD_( cpal ); + LOAD_( colr ); + } + /* consider the pclt, kerning, and gasp tables as optional */ LOAD_( pclt ); LOAD_( gasp ); @@ -1389,12 +1398,13 @@ FT_Long flags = root->face_flags; - /*********************************************************************/ - /* */ - /* Compute face flags. */ - /* */ + /********************************************************************** + * + * Compute face flags. + */ if ( face->sbit_table_type == TT_SBIT_TABLE_TYPE_CBLC || - face->sbit_table_type == TT_SBIT_TABLE_TYPE_SBIX ) + face->sbit_table_type == TT_SBIT_TABLE_TYPE_SBIX || + face->colr ) flags |= FT_FACE_FLAG_COLOR; /* color glyphs */ if ( has_outline == TRUE ) @@ -1438,10 +1448,10 @@ root->face_flags = flags; - /*********************************************************************/ - /* */ - /* Compute style flags. */ - /* */ + /********************************************************************** + * + * Compute style flags. + */ flags = 0; if ( has_outline == TRUE && face->os2.version != 0xFFFFU ) @@ -1471,14 +1481,14 @@ root->style_flags |= flags; - /*********************************************************************/ - /* */ - /* Polish the charmaps. */ - /* */ - /* Try to set the charmap encoding according to the platform & */ - /* encoding ID of each charmap. Emulate Unicode charmap if one */ - /* is missing. */ - /* */ + /********************************************************************** + * + * Polish the charmaps. + * + * Try to set the charmap encoding according to the platform & + * encoding ID of each charmap. Emulate Unicode charmap if one + * is missing. + */ tt_face_build_cmaps( face ); /* ignore errors */ @@ -1521,7 +1531,8 @@ error = FT_CMap_New( (FT_CMap_Class)&tt_cmap_unicode_class_rec, NULL, &cmaprec, NULL ); if ( error && - FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) ) + FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) && + FT_ERR_NEQ( error, Unimplemented_Feature ) ) goto Exit; error = FT_Err_Ok; @@ -1533,9 +1544,9 @@ #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS /* - * Now allocate the root array of FT_Bitmap_Size records and - * populate them. Unfortunately, it isn't possible to indicate bit - * depths in the FT_Bitmap_Size record. This is a design error. + * Now allocate the root array of FT_Bitmap_Size records and + * populate them. Unfortunately, it isn't possible to indicate bit + * depths in the FT_Bitmap_Size record. This is a design error. */ { FT_UInt count; @@ -1615,10 +1626,10 @@ root->face_flags |= FT_FACE_FLAG_SCALABLE; - /*********************************************************************/ - /* */ - /* Set up metrics. */ - /* */ + /********************************************************************** + * + * Set up metrics. + */ if ( FT_IS_SCALABLE( root ) ) { /* XXX What about if outline header is missing */ @@ -1630,59 +1641,73 @@ root->units_per_EM = face->header.Units_Per_EM; - /* XXX: Computing the ascender/descender/height is very different */ - /* from what the specification tells you. Apparently, we */ - /* must be careful because */ - /* */ - /* - not all fonts have an OS/2 table; in this case, we take */ - /* the values in the horizontal header. However, these */ - /* values very often are not reliable. */ - /* */ - /* - otherwise, the correct typographic values are in the */ - /* sTypoAscender, sTypoDescender & sTypoLineGap fields. */ - /* */ - /* However, certain fonts have these fields set to 0. */ - /* Rather, they have usWinAscent & usWinDescent correctly */ - /* set (but with different values). */ - /* */ - /* As an example, Arial Narrow is implemented through four */ - /* files ARIALN.TTF, ARIALNI.TTF, ARIALNB.TTF & ARIALNBI.TTF */ - /* */ - /* Strangely, all fonts have the same values in their */ - /* sTypoXXX fields, except ARIALNB which sets them to 0. */ - /* */ - /* On the other hand, they all have different */ - /* usWinAscent/Descent values -- as a conclusion, the OS/2 */ - /* table cannot be used to compute the text height reliably! */ - /* */ - - /* The ascender and descender are taken from the `hhea' table. */ - /* If zero, they are taken from the `OS/2' table. */ - - root->ascender = face->horizontal.Ascender; - root->descender = face->horizontal.Descender; - - root->height = root->ascender - root->descender + - face->horizontal.Line_Gap; - - if ( !( root->ascender || root->descender ) ) + /* + * Computing the ascender/descender/height is tricky. + * + * The OpenType specification v1.8.3 says: + * + * [OS/2's] sTypoAscender, sTypoDescender and sTypoLineGap fields + * are intended to allow applications to lay out documents in a + * typographically-correct and portable fashion. + * + * This is somewhat at odds with the decades of backwards + * compatibility, operating systems and applications doing whatever + * they want, not to mention broken fonts. + * + * Not all fonts have an OS/2 table; in this case, we take the values + * in the horizontal header, although there is nothing stopping the + * values from being unreliable. Even with a OS/2 table, certain fonts + * set the sTypoAscender, sTypoDescender and sTypoLineGap fields to 0 + * and instead correctly set usWinAscent and usWinDescent. + * + * As an example, Arial Narrow is shipped as four files ARIALN.TTF, + * ARIALNI.TTF, ARIALNB.TTF and ARIALNBI.TTF. Strangely, all fonts have + * the same values in their sTypo* fields, except ARIALNB.ttf which + * sets them to 0. All of them have different usWinAscent/Descent + * values. The OS/2 table therefore cannot be trusted for computing the + * text height reliably. + * + * As a compromise, do the following: + * + * 1. If the OS/2 table exists and the fsSelection bit 7 is set + * (USE_TYPO_METRICS), trust the font and use the sTypo* metrics. + * 2. Otherwise, use the `hhea' table's metrics. + * 3. If they are zero and the OS/2 table exists, + * 1. use the OS/2 table's sTypo* metrics if they are non-zero. + * 2. Otherwise, use the OS/2 table's usWin* metrics. + */ + + if ( face->os2.version != 0xFFFFU && face->os2.fsSelection & 128 ) { - if ( face->os2.version != 0xFFFFU ) - { - if ( face->os2.sTypoAscender || face->os2.sTypoDescender ) - { - root->ascender = face->os2.sTypoAscender; - root->descender = face->os2.sTypoDescender; + root->ascender = face->os2.sTypoAscender; + root->descender = face->os2.sTypoDescender; + root->height = root->ascender - root->descender + + face->os2.sTypoLineGap; + } + else + { + root->ascender = face->horizontal.Ascender; + root->descender = face->horizontal.Descender; + root->height = root->ascender - root->descender + + face->horizontal.Line_Gap; - root->height = root->ascender - root->descender + - face->os2.sTypoLineGap; - } - else + if ( !( root->ascender || root->descender ) ) + { + if ( face->os2.version != 0xFFFFU ) { - root->ascender = (FT_Short)face->os2.usWinAscent; - root->descender = -(FT_Short)face->os2.usWinDescent; - - root->height = root->ascender - root->descender; + if ( face->os2.sTypoAscender || face->os2.sTypoDescender ) + { + root->ascender = face->os2.sTypoAscender; + root->descender = face->os2.sTypoDescender; + root->height = root->ascender - root->descender + + face->os2.sTypoLineGap; + } + else + { + root->ascender = (FT_Short)face->os2.usWinAscent; + root->descender = -(FT_Short)face->os2.usWinDescent; + root->height = root->ascender - root->descender; + } } } } @@ -1737,6 +1762,13 @@ /* destroy the embedded bitmaps table if it is loaded */ if ( sfnt->free_eblc ) sfnt->free_eblc( face ); + + /* destroy color table data if it is loaded */ + if ( sfnt->free_cpal ) + { + sfnt->free_cpal( face ); + sfnt->free_colr( face ); + } } #ifdef TT_CONFIG_OPTION_BDF @@ -1792,11 +1824,18 @@ FT_FREE( face->sbit_strike_map ); face->root.num_fixed_sizes = 0; -#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT FT_FREE( face->postscript_name ); + +#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT FT_FREE( face->var_postscript_prefix ); #endif + /* freeing glyph color palette data */ + FT_FREE( face->palette_data.palette_name_ids ); + FT_FREE( face->palette_data.palette_flags ); + FT_FREE( face->palette_data.palette_entry_name_ids ); + FT_FREE( face->palette ); + face->sfnt = NULL; } |