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`Activate' gray-scale specifing hinting within the TrueType

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bytecode interpreter.  This is an experimental feature which
should probably be made optional.

* src/truetype/ttgload.c (TT_Process_Simple_Glyph,
load_truetype_glyph): Move the code to set the pedantic_hinting flag
to...
(TT_Load_Glyph): Here.
Set `grayscale' flag except for `FT_LOAD_TARGET_MONO'.

* src/truetyep/ttinterp.c (Ins_GETINFO): Return MS rasterizer
version 1.7.
Return rotation and stretching info only if glyph is rotated or
stretched, respectively.
Handle grayscale info.

* src/truetype/ttinterp.h (TT_ExecContextRec): Add `grayscale'
member.
This commit is contained in:
Werner Lemberg 2004-08-07 15:08:33 +00:00
parent b8fdcd68d2
commit dea712b4eb
4 changed files with 41 additions and 15 deletions
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21
ChangeLog
View File

@ -1,3 +1,24 @@
2004-08-05 David Turner <david@freetype.org>
`Activate' gray-scale specifing hinting within the TrueType
bytecode interpreter. This is an experimental feature which
should probably be made optional.
* src/truetype/ttgload.c (TT_Process_Simple_Glyph,
load_truetype_glyph): Move the code to set the pedantic_hinting flag
to...
(TT_Load_Glyph): Here.
Set `grayscale' flag except for `FT_LOAD_TARGET_MONO'.
* src/truetyep/ttinterp.c (Ins_GETINFO): Return MS rasterizer
version 1.7.
Return rotation and stretching info only if glyph is rotated or
stretched, respectively.
Handle grayscale info.
* src/truetype/ttinterp.h (TT_ExecContextRec): Add `grayscale'
member.
2004-08-02 George Williams <gww@silcom.com>
* src/base/ftobjs.c (FT_Attach_File): Initialize `open.stream'.

10
src/truetype/ttgload.c
View File

@ -818,8 +818,6 @@
goto Exit;
load->exec->is_composite = FALSE;
load->exec->pedantic_hinting = (FT_Bool)( load->load_flags &
FT_LOAD_PEDANTIC );
load->exec->pts = *zone;
load->exec->pts.n_points += 4;
@ -1548,8 +1546,6 @@
if ( IS_HINTED( loader->load_flags ) && n_ins > 0 )
{
exec->is_composite = TRUE;
exec->pedantic_hinting =
(FT_Bool)( loader->load_flags & FT_LOAD_PEDANTIC );
error = TT_Run_Context( exec, ((TT_Size)loader->size)->debug );
if ( error && exec->pedantic_hinting )
goto Fail;
@ -1973,6 +1969,12 @@
/* load default graphics state - if needed */
if ( size->GS.instruct_control & 2 )
loader.exec->GS = tt_default_graphics_state;
loader.exec->pedantic_hinting =
FT_BOOL( load_flags & FT_LOAD_PEDANTIC );
loader.exec->grayscale =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) != FT_LOAD_TARGET_MONO );
}
#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */

21
src/truetype/ttinterp.c
View File

@ -6617,8 +6617,6 @@
/* Opcode range: 0x88 */
/* Stack: uint32 --> uint32 */
/* */
/* XXX: According to Apple specs, bits 1 & 2 of the argument ought to be */
/* consulted before rotated/stretched info is returned. */
static void
Ins_GETINFO( INS_ARG )
{
@ -6627,18 +6625,21 @@
K = 0;
/* We return then Windows 3.1 version number */
/* for the font scaler */
/* We return MS rasterizer version 1.7 for the font scaler. */
if ( ( args[0] & 1 ) != 0 )
K = 3;
K = 35;
/* Has the glyph been rotated ? */
if ( CUR.tt_metrics.rotated )
/* Has the glyph been rotated? */
if ( ( args[0] & 2 ) != 0 && CUR.tt_metrics.rotated )
K |= 0x80;
/* Has the glyph been stretched ? */
if ( CUR.tt_metrics.stretched )
K |= 0x100;
/* Has the glyph been stretched? */
if ( ( args[0] & 4 ) != 0 && CUR.tt_metrics.stretched )
K |= 1 << 8;
/* Are we hinting for grayscale? */
if ( ( args[0] & 32 ) != 0 && CUR.grayscale )
K |= (1 << 12);
args[0] = K;
}

4
src/truetype/ttinterp.h
View File

@ -4,7 +4,7 @@
/* */
/* TrueType bytecode interpreter (specification). */
/* */
/* Copyright 1996-2001, 2002, 2003 by */
/* Copyright 1996-2001, 2002, 2003, 2004 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -219,6 +219,8 @@ FT_BEGIN_HEADER
FT_ULong loadSize;
TT_SubGlyph_Stack loadStack; /* loading subglyph stack */
FT_Bool grayscale; /* are we hinting for grayscale? */
} TT_ExecContextRec;