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Formatting, documentation improvements.

This commit is contained in:
Werner Lemberg 2015-09-24 12:14:38 +02:00
parent e982f5b78a
commit cbdf13e5ca
1 changed files with 19 additions and 18 deletions
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37
src/sfnt/ttcmap.c
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@ -199,7 +199,7 @@
/***** FORMAT 2 *****/
/***** *****/
/***** This is used for certain CJK encodings that encode text in a *****/
/***** mixed 8/16 bits encoding along the following lines: *****/
/***** mixed 8/16 bits encoding along the following lines. *****/
/***** *****/
/***** * Certain byte values correspond to an 8-bit character code *****/
/***** (typically in the range 0..127 for ASCII compatibility). *****/
@ -209,19 +209,19 @@
/***** second byte of a 2-byte character). *****/
/***** *****/
/***** The following charmap lookup and iteration functions all *****/
/***** assume that the value "charcode" correspond to following: *****/
/***** assume that the value `charcode' fulfills the following. *****/
/***** *****/
/***** - For one byte characters, "charcode" is simply the *****/
/***** - For one byte characters, `charcode' is simply the *****/
/***** character code. *****/
/***** *****/
/***** - For two byte characters, "charcode" is the 2-byte *****/
/***** character code in big endian format. More exactly: *****/
/***** - For two byte characters, `charcode' is the 2-byte *****/
/***** character code in big endian format. More precisely: *****/
/***** *****/
/***** (charcode >> 8) is the first byte value *****/
/***** (charcode & 0xFF) is the second byte value *****/
/***** *****/
/***** Note that not all values of "charcode" are valid according *****/
/***** to these rules, and the function moderately check the *****/
/***** Note that not all values of `charcode' are valid according *****/
/***** to these rules, and the function moderately checks the *****/
/***** arguments. *****/
/***** *****/
/*************************************************************************/
@ -249,7 +249,7 @@
/* table, i.e., it is the corresponding sub-header index multiplied */
/* by 8. */
/* */
/* Each sub-header has the following format: */
/* Each sub-header has the following format. */
/* */
/* NAME OFFSET TYPE DESCRIPTION */
/* */
@ -264,11 +264,11 @@
/* according to the specification. */
/* */
/* If a character code is contained within a given sub-header, then */
/* mapping it to a glyph index is done as follows: */
/* mapping it to a glyph index is done as follows. */
/* */
/* * The value of `offset' is read. This is a _byte_ distance from the */
/* location of the `offset' field itself into a slice of the */
/* `glyph_ids' table. Let's call it `slice' (it is a USHORT[] too). */
/* `glyph_ids' table. Let's call it `slice' (it is a USHORT[], too). */
/* */
/* * The value `slice[char.lo - first]' is read. If it is 0, there is */
/* no glyph for the charcode. Otherwise, the value of `delta' is */
@ -326,7 +326,7 @@
FT_ASSERT( p == table + 518 );
subs = p;
glyph_ids = subs + (max_subs + 1) * 8;
glyph_ids = subs + ( max_subs + 1 ) * 8;
if ( glyph_ids > valid->limit )
FT_INVALID_TOO_SHORT;
@ -436,6 +436,7 @@
}
result = sub;
}
Exit:
return result;
}
@ -475,6 +476,7 @@
result = (FT_UInt)( (FT_Int)idx + delta ) & 0xFFFFU;
}
}
return result;
}
@ -973,7 +975,7 @@
/* segment if it contains only a single character. */
/* */
/* We thus omit the test here, delaying it to the */
/* routines which actually access the cmap. */
/* routines that actually access the cmap. */
else if ( n != num_segs - 1 ||
!( start == 0xFFFFU && end == 0xFFFFU ) )
{
@ -1310,7 +1312,6 @@
/* if `charcode' is not in any segment, then `mid' is */
/* the segment nearest to `charcode' */
/* */
if ( charcode > end )
{
@ -1443,7 +1444,7 @@
/* */
/* NAME OFFSET TYPE DESCRIPTION */
/* */
/* format 0 USHORT must be 4 */
/* format 0 USHORT must be 6 */
/* length 2 USHORT table length in bytes */
/* language 4 USHORT Mac language code */
/* */
@ -1511,6 +1512,7 @@
p += 2 * idx;
result = TT_PEEK_USHORT( p );
}
return result;
}
@ -1602,7 +1604,7 @@
/***** *****/
/***** The purpose of this format is to easily map UTF-16 text to *****/
/***** glyph indices. Basically, the `char_code' must be in one of *****/
/***** the following formats: *****/
/***** the following formats. *****/
/***** *****/
/***** - A 16-bit value that isn't part of the Unicode Surrogates *****/
/***** Area (i.e. U+D800-U+DFFF). *****/
@ -1615,7 +1617,7 @@
/***** The `is32' table embedded in the charmap indicates whether a *****/
/***** given 16-bit value is in the surrogates area or not. *****/
/***** *****/
/***** So, for any given `char_code', we can assert the following: *****/
/***** So, for any given `char_code', we can assert the following. *****/
/***** *****/
/***** If `char_hi == 0' then we must have `is32[char_lo] == 0'. *****/
/***** *****/
@ -2230,7 +2232,6 @@
/* if `char_code' is not in any group, then `mid' is */
/* the group nearest to `char_code' */
/* */
if ( char_code > end )
{
@ -2485,7 +2486,7 @@
if ( gindex )
{
cmap->cur_charcode = char_code;;
cmap->cur_charcode = char_code;
cmap->cur_gindex = gindex;
cmap->cur_group = n;