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[truetype] Add `interpreter-version' property. 

This makes the option TT_CONFIG_OPTION_SUBPIXEL_HINTING controllable
at runtime.

* src/truetype/ttdriver.c: Include FT_TRUETYPE_DRIVER_H.
(tt_property_set, tt_property_get): Fill templates.

* src/truetype/ttobjs.h (TT_DriverRec): Add `interpreter_version'
member.
Remove unused `extension_component' member.

* src/truetype/ttgload.c: Include FT_TRUETYPE_DRIVER_H.
(tt_get_metrics, TT_Hint_Glyph, TT_Process_Simple_Glyph,
compute_glyph_metrics, tt_loader_init): Use `interpreter_version'.

* src/truetype/ttinterp.c: Include FT_TRUETYPE_DRIVER_H.
(SUBPIXEL_HINTING): New macro to check `interpreter_version' flag.
Update all affected functions to use it.
Use TT_INTERPRETER_VERSION_XXX where appropriate.

* src/truetype/ttobjs.c: Include FT_TRUETYPE_DRIVER_H.
(tt_driver_init): Initialize `interpreter_version'.

* src/truetype/ttsubpix.c: Include FT_TRUETYPE_DRIVER_H.
Use TT_INTERPRETER_VERSION_XXX where appropriate.
This commit is contained in:
Werner Lemberg 2013-05-17 13:51:07 +02:00
parent 6650be7c43
commit f04951af8d
10 changed files with 755 additions and 405 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
ChangeLog
View File

@ -1,3 +1,32 @@
2013-05-15 Werner Lemberg <wl@gnu.org>
[truetype] Add `interpreter-version' property.
This makes the option TT_CONFIG_OPTION_SUBPIXEL_HINTING controllable
at runtime.
* src/truetype/ttdriver.c: Include FT_TRUETYPE_DRIVER_H.
(tt_property_set, tt_property_get): Fill templates.
* src/truetype/ttobjs.h (TT_DriverRec): Add `interpreter_version'
member.
Remove unused `extension_component' member.
* src/truetype/ttgload.c: Include FT_TRUETYPE_DRIVER_H.
(tt_get_metrics, TT_Hint_Glyph, TT_Process_Simple_Glyph,
compute_glyph_metrics, tt_loader_init): Use `interpreter_version'.
* src/truetype/ttinterp.c: Include FT_TRUETYPE_DRIVER_H.
(SUBPIXEL_HINTING): New macro to check `interpreter_version' flag.
Update all affected functions to use it.
Use TT_INTERPRETER_VERSION_XXX where appropriate.
* src/truetype/ttobjs.c: Include FT_TRUETYPE_DRIVER_H.
(tt_driver_init): Initialize `interpreter_version'.
* src/truetype/ttsubpix.c: Include FT_TRUETYPE_DRIVER_H.
Use TT_INTERPRETER_VERSION_XXX where appropriate.
2013-05-13 Werner Lemberg <wl@gnu.org>
[truetype] Avoid empty source file.

13
include/freetype/config/ftheader.h
View File

@ -341,6 +341,19 @@
#define FT_CFF_DRIVER_H <freetype/ftcffdrv.h>
/*************************************************************************
*
* @macro:
* FT_TRUETYPE_DRIVER_H
*
* @description:
* A macro used in #include statements to name the file containing
* structures and macros related to the TrueType driver module.
*
*/
#define FT_TRUETYPE_DRIVER_H <freetype/ftttdrv.h>
/*************************************************************************
*
* @macro:

18
include/freetype/ftchapters.h
View File

@ -67,27 +67,15 @@
/***************************************************************************/
/* */
/* <Chapter> */
/* auto_hinter */
/* module_specific */
/* */
/* <Title> */
/* The Auto-Hinter */
/* Controlling FreeType Modules */
/* */
/* <Sections> */
/* auto_hinter */
/* */
/***************************************************************************/
/***************************************************************************/
/* */
/* <Chapter> */
/* cff_driver */
/* */
/* <Title> */
/* The CFF Driver */
/* */
/* <Sections> */
/* cff_driver */
/* tt_driver */
/* */
/***************************************************************************/

150
include/freetype/ftttdrv.h Normal file
View File

@ -0,0 +1,150 @@
/***************************************************************************/
/* */
/* ftttdrv.h */
/* */
/* FreeType API for controlling the TrueType driver */
/* (specification only). */
/* */
/* Copyright 2013 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. */
/* */
/***************************************************************************/
#ifndef __FTTTDRV_H__
#define __FTTTDRV_H__
#include <ft2build.h>
#include FT_FREETYPE_H
#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif
FT_BEGIN_HEADER
/**************************************************************************
*
* @section:
* tt_driver
*
* @title:
* The TrueType driver
*
* @abstract:
* Controlling the TrueType driver module.
*
* @description:
* While FreeType's TrueType driver doesn't expose API functions by
* itself, it is possible to control its behaviour with @FT_Property_Set
* and @FT_Property_Get. The following lists the available properties
* together with the necessary macros and structures.
*
* The TrueType driver's module name is `truetype'.
*
*/
/**************************************************************************
*
* @property:
* interpreter-version
*
* @description:
* Currently, two versions are available which represent the bytecode
* interpreter with and without subpixel hinting support,
* respectively. The default is subpixel support if
* TT_CONFIG_OPTION_SUBPIXEL_HINTING is defined, and no subpixel
* support otherwise (since it isn't available then).
*
* If subpixel hinting is on, many TrueType bytecode instructions
* behave differently compared to B/W or grayscale rendering. The
* main idea is to render at a much increased horizontal resolution,
* then sampling down the created output to subpixel precision.
* However, many older fonts are not suited to this and must be
* specially taken care of by applying (hardcoded) font-specific
* tweaks.
*
* Details on subpixel hinting and some of the necessary tweaks can be
* found in Greg Hitchcock's whitepaper at
* `http://www.microsoft.com/typography/cleartype/truetypecleartype.aspx'.
*
* The following example code demonstrates how to activate subpixel
* hinting (omitting the error handling).
*
* {
* FT_Library library;
* FT_Face face;
* FT_UInt interpreter_version = TT_INTERPRETER_VERSION_38;
*
*
* FT_Init_FreeType( &library );
*
* FT_Property_Set( library, "truetype",
* "interpreter-version",
* &interpreter_version );
* }
*
* @note:
* This property can be used with @FT_Property_Get also.
*
*/
/**************************************************************************
*
* @enum:
* TT_INTERPRETER_VERSION_XXX
*
* @description:
* A list of constants used for the @interpreter-version property to
* select the hinting engine for Truetype fonts.
*
* The numeric value in the constant names represents the version
* number as returned by the `GETINFO' bytecode instruction.
*
* @values:
* TT_INTERPRETER_VERSION_35 ::
* Version~35 corresponds to MS rasterizer v.1.7 as used e.g. in
* Windows~98; only grayscale and B/W rasterizing is supported.
*
* TT_INTERPRETER_VERSION_38 ::
* Version~38 corresponds to MS rasterizer v.1.9; it is roughly
* equivalent to the hinting provided by DirectWrite ClearType (as
* can be found, for example, in the Internet Explorer~9 running on
* Windows~7).
*
* @note:
* This property controls the behaviour of the bytecode interpreter
* and thus how outlines get hinted. It does *not* control how glyph
* get rasterized! In particular, it does not control subpixel color
* filtering.
*
* If FreeType has not been compiled with configuration option
* FT_CONFIG_OPTION_SUBPIXEL_HINTING, selecting version~38 causes an
* `FT_Err_Unimplemented_Feature' error.
*
*/
#define TT_INTERPRETER_VERSION_35 35
#define TT_INTERPRETER_VERSION_38 38
/* */
FT_END_HEADER
#endif /* __FTTTDRV_H__ */
/* END */

36
src/truetype/ttdriver.c
View File

@ -30,6 +30,7 @@
#include FT_SERVICE_TRUETYPE_ENGINE_H
#include FT_SERVICE_TRUETYPE_GLYF_H
#include FT_SERVICE_PROPERTIES_H
#include FT_TRUETYPE_DRIVER_H
#include "ttdriver.h"
#include "ttgload.h"
@ -66,7 +67,24 @@
TT_Driver driver = (TT_Driver)module;
return error;
if ( !ft_strcmp( property_name, "interpreter-version" ) )
{
FT_UInt* interpreter_version = (FT_UInt*)value;
#ifndef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( *interpreter_version != TT_INTERPRETER_VERSION_35 )
error = FT_ERR( Unimplemented_Feature );
else
#endif
driver->interpreter_version = *interpreter_version;
return error;
}
FT_TRACE0(( "tt_property_set: missing property `%s'\n",
property_name ));
return FT_THROW( Missing_Property );
}
@ -78,8 +96,22 @@
FT_Error error = FT_Err_Ok;
TT_Driver driver = (TT_Driver)module;
FT_UInt interpreter_version = driver->interpreter_version;
return error;
if ( !ft_strcmp( property_name, "interpreter-version" ) )
{
FT_UInt* val = (FT_UInt*)value;
*val = interpreter_version;
return error;
}
FT_TRACE0(( "tt_property_get: missing property `%s'\n",
property_name ));
return FT_THROW( Missing_Property );
}

389
src/truetype/ttgload.c
View File

@ -23,6 +23,7 @@
#include FT_INTERNAL_SFNT_H
#include FT_TRUETYPE_TAGS_H
#include FT_OUTLINE_H
#include FT_TRUETYPE_DRIVER_H
#include "ttgload.h"
#include "ttpload.h"
@ -132,7 +133,10 @@
tt_get_metrics( TT_Loader loader,
FT_UInt glyph_index )
{
TT_Face face = (TT_Face)loader->face;
TT_Face face = (TT_Face)loader->face;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( face );
#endif
FT_Short left_bearing = 0, top_bearing = 0;
FT_UShort advance_width = 0, advance_height = 0;
@ -151,12 +155,15 @@
loader->vadvance = advance_height;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( loader->exec )
loader->exec->sph_tweak_flags = 0;
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )
{
if ( loader->exec )
loader->exec->sph_tweak_flags = 0;
/* this may not be the right place for this, but it works */
if ( loader->exec && loader->exec->ignore_x_mode )
sph_set_tweaks( loader, glyph_index );
/* this may not be the right place for this, but it works */
if ( loader->exec && loader->exec->ignore_x_mode )
sph_set_tweaks( loader, glyph_index );
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
if ( !loader->linear_def )
@ -720,6 +727,11 @@
TT_Hint_Glyph( TT_Loader loader,
FT_Bool is_composite )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
TT_Face face = (TT_Face)loader->face;
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( face );
#endif
TT_GlyphZone zone = &loader->zone;
FT_Pos origin;
@ -820,12 +832,16 @@
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( loader->exec->sph_tweak_flags & SPH_TWEAK_DEEMBOLDEN )
FT_Outline_EmboldenXY( &loader->gloader->current.outline, -24, 0 );
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )
{
if ( loader->exec->sph_tweak_flags & SPH_TWEAK_DEEMBOLDEN )
FT_Outline_EmboldenXY( &loader->gloader->current.outline, -24, 0 );
else if ( loader->exec->sph_tweak_flags & SPH_TWEAK_EMBOLDEN )
FT_Outline_EmboldenXY( &loader->gloader->current.outline, 24, 0 );
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
else if ( loader->exec->sph_tweak_flags & SPH_TWEAK_EMBOLDEN )
FT_Outline_EmboldenXY( &loader->gloader->current.outline, 24, 0 );
#endif
return FT_Err_Ok;
}
@ -848,14 +864,6 @@
FT_Outline* outline;
FT_Int n_points;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
TT_Face face = (TT_Face)loader->face;
FT_String* family = face->root.family_name;
FT_Int ppem = loader->size->metrics.x_ppem;
FT_String* style = face->root.style_name;
FT_Int x_scale_factor = 1000;
#endif
outline = &gloader->current.outline;
n_points = outline->n_points;
@ -910,54 +918,83 @@
loader->zone.n_points + 4 );
}
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* scale, but only if enabled and only if TT hinting is being used */
if ( IS_HINTED( loader->load_flags ) )
x_scale_factor = sph_test_tweak_x_scaling( face,
family,
ppem,
style,
loader->glyph_index );
/* scale the glyph */
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 ||
x_scale_factor != 1000 )
{
FT_Vector* vec = outline->points;
FT_Vector* limit = outline->points + n_points;
FT_Fixed x_scale = FT_MulDiv(
((TT_Size)loader->size)->metrics.x_scale,
x_scale_factor, 1000 );
FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
TT_Face face = (TT_Face)loader->face;
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( face );
FT_String* family = face->root.family_name;
FT_Int ppem = loader->size->metrics.x_ppem;
FT_String* style = face->root.style_name;
FT_Int x_scale_factor = 1000;
#endif
FT_Vector* vec = outline->points;
FT_Vector* limit = outline->points + n_points;
FT_Fixed x_scale;
FT_Fixed y_scale;
FT_Bool do_scale = FALSE;
/* compensate for any scaling by de/emboldening; */
/* the amount was determined via experimentation */
if ( x_scale_factor != 1000 && ppem > 11 )
FT_Outline_EmboldenXY( outline,
FT_MulFix( 1280 * ppem,
1000 - x_scale_factor ),
0 );
#else
/* scale the glyph */
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
FT_Vector* vec = outline->points;
FT_Vector* limit = outline->points + n_points;
FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
for ( ; vec < limit; vec++ )
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
/* scale, but only if enabled and only if TT hinting is being used */
if ( IS_HINTED( loader->load_flags ) )
x_scale_factor = sph_test_tweak_x_scaling( face,
family,
ppem,
style,
loader->glyph_index );
/* scale the glyph */
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 ||
x_scale_factor != 1000 )
{
x_scale = FT_MulDiv( ((TT_Size)loader->size)->metrics.x_scale,
x_scale_factor, 1000 );
y_scale = ((TT_Size)loader->size)->metrics.y_scale;
/* compensate for any scaling by de/emboldening; */
/* the amount was determined via experimentation */
if ( x_scale_factor != 1000 && ppem > 11 )
FT_Outline_EmboldenXY( outline,
FT_MulFix( 1280 * ppem,
1000 - x_scale_factor ),
0 );
do_scale = TRUE;
}
}
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
{
/* scale the glyph */
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
x_scale = ((TT_Size)loader->size)->metrics.x_scale;
y_scale = ((TT_Size)loader->size)->metrics.y_scale;
do_scale = TRUE;
}
}
loader->pp1 = outline->points[n_points - 4];
loader->pp2 = outline->points[n_points - 3];
loader->pp3 = outline->points[n_points - 2];
loader->pp4 = outline->points[n_points - 1];
if ( do_scale )
{
for ( ; vec < limit; vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
loader->pp1 = outline->points[n_points - 4];
loader->pp2 = outline->points[n_points - 3];
loader->pp3 = outline->points[n_points - 2];
loader->pp4 = outline->points[n_points - 1];
}
}
if ( IS_HINTED( loader->load_flags ) )
@ -1662,11 +1699,15 @@
compute_glyph_metrics( TT_Loader loader,
FT_UInt glyph_index )
{
TT_Face face = (TT_Face)loader->face;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( face );
#endif
FT_BBox bbox;
TT_Face face = (TT_Face)loader->face;
FT_Fixed y_scale;
TT_GlyphSlot glyph = loader->glyph;
TT_Size size = (TT_Size)loader->size;
TT_Size size = (TT_Size)loader->size;
y_scale = 0x10000L;
@ -1692,27 +1733,35 @@
{
FT_Byte* widthp;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_Bool ignore_x_mode;
ignore_x_mode = FT_BOOL( FT_LOAD_TARGET_MODE( loader->load_flags ) !=
FT_RENDER_MODE_MONO );
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
widthp = tt_face_get_device_metrics( face,
size->root.metrics.x_ppem,
glyph_index );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( widthp &&
( ( ignore_x_mode && loader->exec->compatible_widths ) ||
!ignore_x_mode ||
SPH_OPTION_BITMAP_WIDTHS ) )
#else
if ( widthp )
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )
{
FT_Bool ignore_x_mode;
ignore_x_mode = FT_BOOL( FT_LOAD_TARGET_MODE( loader->load_flags ) !=
FT_RENDER_MODE_MONO );
if ( widthp &&
( ( ignore_x_mode && loader->exec->compatible_widths ) ||
!ignore_x_mode ||
SPH_OPTION_BITMAP_WIDTHS ) )
glyph->metrics.horiAdvance = *widthp << 6;
}
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
glyph->metrics.horiAdvance = *widthp << 6;
{
if ( widthp )
glyph->metrics.horiAdvance = *widthp << 6;
}
}
/* set glyph dimensions */
@ -1908,17 +1957,24 @@
{
TT_ExecContext exec;
FT_Bool grayscale;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_Bool subpixel_hinting;
FT_Bool grayscale_hinting;
TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( face );
FT_Bool subpixel_hinting = FALSE;
FT_Bool grayscale_hinting = TRUE;
#if 0
FT_Bool compatible_widths;
FT_Bool symmetrical_smoothing;
FT_Bool bgr;
FT_Bool subpixel_positioned;
/* not used yet */
FT_Bool compatible_widths;
FT_Bool symmetrical_smoothing;
FT_Bool bgr;
FT_Bool subpixel_positioned;
#endif
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
FT_Bool reexecute = FALSE;
if ( !size->cvt_ready )
{
@ -1937,114 +1993,115 @@
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
subpixel_hinting = FT_BOOL( ( FT_LOAD_TARGET_MODE( load_flags )
!= FT_RENDER_MODE_MONO ) &&
SPH_OPTION_SET_SUBPIXEL );
if ( subpixel_hinting )
grayscale = grayscale_hinting = FALSE;
else if ( SPH_OPTION_SET_GRAYSCALE )
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )
{
grayscale = grayscale_hinting = TRUE;
subpixel_hinting = FALSE;
}
else
grayscale = grayscale_hinting = FALSE;
subpixel_hinting = FT_BOOL( ( FT_LOAD_TARGET_MODE( load_flags )
!= FT_RENDER_MODE_MONO ) &&
SPH_OPTION_SET_SUBPIXEL );
if ( FT_IS_TRICKY( glyph->face ) )
subpixel_hinting = grayscale_hinting = FALSE;
if ( subpixel_hinting )
grayscale = grayscale_hinting = FALSE;
else if ( SPH_OPTION_SET_GRAYSCALE )
{
grayscale = grayscale_hinting = TRUE;
subpixel_hinting = FALSE;
}
else
grayscale = grayscale_hinting = FALSE;
exec->ignore_x_mode = subpixel_hinting || grayscale_hinting;
exec->rasterizer_version = SPH_OPTION_SET_RASTERIZER_VERSION;
if ( exec->sph_tweak_flags & SPH_TWEAK_RASTERIZER_35 )
exec->rasterizer_version = 35;
if ( FT_IS_TRICKY( glyph->face ) )
subpixel_hinting = grayscale_hinting = FALSE;
exec->ignore_x_mode = subpixel_hinting || grayscale_hinting;
exec->rasterizer_version = SPH_OPTION_SET_RASTERIZER_VERSION;
if ( exec->sph_tweak_flags & SPH_TWEAK_RASTERIZER_35 )
exec->rasterizer_version = TT_INTERPRETER_VERSION_35;
#if 1
exec->compatible_widths = SPH_OPTION_SET_COMPATIBLE_WIDTHS;
exec->symmetrical_smoothing = FALSE;
exec->bgr = FALSE;
exec->subpixel_positioned = TRUE;
exec->compatible_widths = SPH_OPTION_SET_COMPATIBLE_WIDTHS;
exec->symmetrical_smoothing = FALSE;
exec->bgr = FALSE;
exec->subpixel_positioned = TRUE;
#else /* 0 */
exec->compatible_widths =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_COMPATIBLE_WIDTHS );
exec->symmetrical_smoothing =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_SYMMETRICAL_SMOOTHING );
exec->bgr =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_BGR );
exec->subpixel_positioned =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_SUBPIXEL_POSITIONED );
exec->compatible_widths =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_COMPATIBLE_WIDTHS );
exec->symmetrical_smoothing =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_SYMMETRICAL_SMOOTHING );
exec->bgr =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_BGR );
exec->subpixel_positioned =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
TT_LOAD_SUBPIXEL_POSITIONED );
#endif /* 0 */
#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
}
else
grayscale =
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) != FT_RENDER_MODE_MONO );
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
{
grayscale = FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) !=
FT_RENDER_MODE_MONO );
}
TT_Load_Context( exec, face, size );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* a change from mono to subpixel rendering (and vice versa) */
/* requires a re-execution of the CVT program */
if ( subpixel_hinting != exec->subpixel_hinting )
if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )
{
/* a change from mono to subpixel rendering (and vice versa) */
/* requires a re-execution of the CVT program */
if ( subpixel_hinting != exec->subpixel_hinting )
{
FT_TRACE4(( "tt_loader_init: subpixel hinting change,"
" re-executing `prep' table\n" ));
exec->subpixel_hinting = subpixel_hinting;
reexecute = TRUE;
}
/* a change from mono to grayscale rendering (and vice versa) */
/* requires a re-execution of the CVT program */
if ( grayscale != exec->grayscale_hinting )
{
FT_TRACE4(( "tt_loader_init: grayscale hinting change,"
" re-executing `prep' table\n" ));
exec->grayscale_hinting = grayscale_hinting;
reexecute = TRUE;
}
}
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
{
/* a change from mono to grayscale rendering (and vice versa) */
/* requires a re-execution of the CVT program */
if ( grayscale != exec->grayscale )
{
FT_TRACE4(( "tt_loader_init: grayscale change,"
" re-executing `prep' table\n" ));
exec->grayscale = grayscale;
reexecute = TRUE;
}
}
if ( reexecute )
{
FT_UInt i;
FT_TRACE4(( "tt_loader_init: subpixel hinting change,"
" re-executing `prep' table\n" ));
exec->subpixel_hinting = subpixel_hinting;
for ( i = 0; i < size->cvt_size; i++ )
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
tt_size_run_prep( size, pedantic );
}
/* a change from mono to grayscale rendering (and vice versa) */
/* requires a re-execution of the CVT program */
if ( grayscale != exec->grayscale_hinting )
{
FT_UInt i;
FT_TRACE4(( "tt_loader_init: grayscale hinting change,"
" re-executing `prep' table\n" ));
exec->grayscale_hinting = grayscale_hinting;
for ( i = 0; i < size->cvt_size; i++ )
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
tt_size_run_prep( size, pedantic );
}
#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* a change from mono to grayscale rendering (and vice versa) */
/* requires a re-execution of the CVT program */
if ( grayscale != exec->grayscale )
{
FT_UInt i;
FT_TRACE4(( "tt_loader_init: grayscale change,"
" re-executing `prep' table\n" ));
exec->grayscale = grayscale;
for ( i = 0; i < size->cvt_size; i++ )
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
tt_size_run_prep( size, pedantic );
}
#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* see whether the cvt program has disabled hinting */
if ( exec->GS.instruct_control & 1 )
load_flags |= FT_LOAD_NO_HINTING;

504
src/truetype/ttinterp.c
View File

@ -25,6 +25,7 @@
#include FT_INTERNAL_CALC_H
#include FT_TRIGONOMETRY_H
#include FT_SYSTEM_H
#include FT_TRUETYPE_DRIVER_H
#include "ttinterp.h"
#include "tterrors.h"
@ -131,6 +132,11 @@
#define FT_UNUSED_ARG FT_UNUSED_EXEC; FT_UNUSED( args )
#define SUBPIXEL_HINTING \
( ((TT_Driver)FT_FACE_DRIVER( CUR.face ))->interpreter_version == \
TT_INTERPRETER_VERSION_38 )
/*************************************************************************/
/* */
/* The following macros hide the use of EXEC_ARG and EXEC_ARG_ to */
@ -1764,10 +1770,11 @@
if ( v != 0 )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVE ) )
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVE ) ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
zone->cur[point].x += FT_MulDiv( distance, v, CUR.F_dot_P );
zone->cur[point].x += FT_MulDiv( distance, v, CUR.F_dot_P );
zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
@ -1842,10 +1849,12 @@
FT_UNUSED_EXEC;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVEX ) )
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVEX ) ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
zone->cur[point].x += distance;
zone->cur[point].x += distance;
zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
@ -3165,7 +3174,8 @@
/* subpixel hinting - avoid Typeman Dstroke and */ \
/* IStroke and Vacuform rounds */ \
\
if ( CUR.ignore_x_mode && \
if ( SUBPIXEL_HINTING && \
CUR.ignore_x_mode && \
( ( I == 24 && \
( CUR.face->sph_found_func_flags & \
( SPH_FDEF_SPACING_1 | \
@ -4604,100 +4614,104 @@
while ( SKIP_Code() == SUCCESS )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
for ( i = 0; i < opcode_patterns; i++ )
if ( SUBPIXEL_HINTING )
{
if ( opcode_pointer[i] < opcode_size[i] &&
CUR.opcode == opcode_pattern[i][opcode_pointer[i]] )
for ( i = 0; i < opcode_patterns; i++ )
{
opcode_pointer[i] += 1;
if ( opcode_pointer[i] == opcode_size[i] )
if ( opcode_pointer[i] < opcode_size[i] &&
CUR.opcode == opcode_pattern[i][opcode_pointer[i]] )
{
FT_TRACE7(( "sph: Function %d, opcode ptrn: %d, %s %s\n",
i, n,
CUR.face->root.family_name,
CUR.face->root.style_name ));
opcode_pointer[i] += 1;
switch ( i )
if ( opcode_pointer[i] == opcode_size[i] )
{
case 0:
rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_1;
break;
FT_TRACE7(( "sph: Function %d, opcode ptrn: %d, %s %s\n",
i, n,
CUR.face->root.family_name,
CUR.face->root.style_name ));
case 1:
rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_2;
CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_2;
break;
case 2:
switch ( n )
{
/* needs to be implemented still */
case 58:
rec->sph_fdef_flags |= SPH_FDEF_DIAGONAL_STROKE;
CUR.face->sph_found_func_flags |= SPH_FDEF_DIAGONAL_STROKE;
}
break;
case 3:
switch ( n )
switch ( i )
{
case 0:
rec->sph_fdef_flags |= SPH_FDEF_VACUFORM_ROUND_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_VACUFORM_ROUND_1;
}
break;
rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_1;
break;
case 4:
/* probably not necessary to detect anymore */
rec->sph_fdef_flags |= SPH_FDEF_TTFAUTOHINT_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_TTFAUTOHINT_1;
break;
case 5:
switch ( n )
{
case 0:
case 1:
case 2:
case 4:
case 7:
case 8:
rec->sph_fdef_flags |= SPH_FDEF_SPACING_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_1;
}
break;
rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_2;
CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_2;
break;
case 6:
switch ( n )
{
case 0:
case 1:
case 2:
switch ( n )
{
/* needs to be implemented still */
case 58:
rec->sph_fdef_flags |= SPH_FDEF_DIAGONAL_STROKE;
CUR.face->sph_found_func_flags |= SPH_FDEF_DIAGONAL_STROKE;
}
break;
case 3:
switch ( n )
{
case 0:
rec->sph_fdef_flags |= SPH_FDEF_VACUFORM_ROUND_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_VACUFORM_ROUND_1;
}
break;
case 4:
case 7:
case 8:
rec->sph_fdef_flags |= SPH_FDEF_SPACING_2;
CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_2;
/* probably not necessary to detect anymore */
rec->sph_fdef_flags |= SPH_FDEF_TTFAUTOHINT_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_TTFAUTOHINT_1;
break;
case 5:
switch ( n )
{
case 0:
case 1:
case 2:
case 4:
case 7:
case 8:
rec->sph_fdef_flags |= SPH_FDEF_SPACING_1;
CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_1;
}
break;
case 6:
switch ( n )
{
case 0:
case 1:
case 2:
case 4:
case 7:
case 8:
rec->sph_fdef_flags |= SPH_FDEF_SPACING_2;
CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_2;
}
break;
}
break;
opcode_pointer[i] = 0;
}
opcode_pointer[i] = 0;
}
else
opcode_pointer[i] = 0;
}
else
opcode_pointer[i] = 0;
/* Set sph_compatibility_mode only when deltas are detected */
CUR.face->sph_compatibility_mode =
( ( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_1 ) |
( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_2 ) );
}
/* Set sph_compatibility_mode only when deltas are detected */
CUR.face->sph_compatibility_mode =
( ( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_1 ) |
( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_2 ) );
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
switch ( CUR.opcode )
@ -5282,7 +5296,8 @@
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* Disable Type 2 Vacuform Rounds - e.g. Arial Narrow */
if ( CUR.ignore_x_mode && FT_ABS( D ) == 64 )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode && FT_ABS( D ) == 64 )
D += 1;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
@ -5779,11 +5794,13 @@
if ( CUR.GS.freeVector.x != 0 )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !CUR.ignore_x_mode ||
( CUR.ignore_x_mode &&
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_MOVE_ZP2 ) ) )
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
( CUR.ignore_x_mode &&
( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_MOVE_ZP2 ) ) ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR.zp2.cur[point].x += dx;
if ( touch )
CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
}
@ -6022,7 +6039,8 @@
/* - the glyph is specifically set to allow SHPIX moves */
/* - the move is on a previously Y-touched point */
if ( CUR.ignore_x_mode )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode )
{
/* save point for later comparison */
if ( CUR.GS.freeVector.y != 0 )
@ -6071,14 +6089,18 @@
( B2 & 63 ) != 0 &&
B1 != B2 ) )
MOVE_Zp2_Point( point, -dx, -dy, TRUE );
}
}
else
MOVE_Zp2_Point( point, dx, dy, TRUE );
}
Skip:
#else
Skip:
#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
MOVE_Zp2_Point( point, dx, dy, TRUE );
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR.GS.loop--;
}
@ -6100,16 +6122,21 @@
{
FT_UShort point;
FT_F26Dot6 distance;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
FT_F26Dot6 control_value_cutin;
control_value_cutin = CUR.GS.control_value_cutin;
if ( SUBPIXEL_HINTING )
{
control_value_cutin = CUR.GS.control_value_cutin;
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = 0;
}
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = 0;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
point = (FT_UShort)args[0];
@ -6136,7 +6163,8 @@
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* subpixel hinting - make MSIRP respect CVT cut-in; */
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
FT_ABS( distance - args[1] ) >= control_value_cutin )
distance = args[1];
@ -6179,7 +6207,8 @@
{
cur_dist = CUR_fast_project( &CUR.zp0.cur[point] );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 )
distance = ROUND_None(
cur_dist,
@ -6221,7 +6250,8 @@
point = (FT_UShort)args[0];
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = 0;
@ -6262,7 +6292,9 @@
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* Only adjust if not in sph_compatibility_mode or ignore_x_mode. */
/* Determined via experimentation and may be incorrect... */
if ( !CUR.ignore_x_mode || !CUR.face->sph_compatibility_mode )
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
!CUR.face->sph_compatibility_mode ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR.zp0.org[point].x = TT_MulFix14( (FT_UInt32)distance,
CUR.GS.freeVector.x );
@ -6271,7 +6303,8 @@
CUR.zp0.cur[point] = CUR.zp0.org[point];
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
( CUR.sph_tweak_flags & SPH_TWEAK_MIAP_HACK ) &&
distance > 0 &&
CUR.GS.freeVector.y != 0 )
@ -6286,7 +6319,8 @@
distance = org_dist;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 )
distance = ROUND_None( distance,
CUR.tt_metrics.compensations[0] );
@ -6320,13 +6354,13 @@
minimum_distance = CUR.GS.minimum_distance;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
minimum_distance = 0;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
point = (FT_UShort)args[0];
if ( BOUNDS( point, CUR.zp1.n_points ) ||
@ -6390,7 +6424,9 @@
if ( ( CUR.opcode & 4 ) != 0 )
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode && CUR.GS.freeVector.x != 0 )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 )
distance = ROUND_None(
org_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
@ -6468,7 +6504,8 @@
cvtEntry = (FT_ULong)( args[1] + 1 );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.x != 0 &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
control_value_cutin = minimum_distance = 0;
@ -6489,10 +6526,12 @@
cvt_dist = 0;
else
cvt_dist = CUR_Func_read_cvt( cvtEntry - 1 );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
( CUR.sph_tweak_flags & SPH_TWEAK_MIRP_CVT_ZERO ) )
cvt_dist = 0;
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
( CUR.sph_tweak_flags & SPH_TWEAK_MIRP_CVT_ZERO ) )
cvt_dist = 0;
#endif
/* single width test */
@ -6531,8 +6570,10 @@
if ( ( org_dist ^ cvt_dist ) < 0 )
cvt_dist = -cvt_dist;
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_TIMES_NEW_ROMAN_HACK ) )
{
@ -6542,6 +6583,7 @@
cvt_dist += 32;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* control value cut-in and round */
if ( ( CUR.opcode & 4 ) != 0 )
@ -6572,23 +6614,23 @@
CUR.tt_metrics.compensations[CUR.opcode & 3] );
}
else
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
{
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/* do cvt cut-in always in MIRP for sph */
if ( CUR.ignore_x_mode && CUR.GS.gep0 == CUR.GS.gep1 )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.GS.gep0 == CUR.GS.gep1 )
{
if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
cvt_dist = org_dist;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
distance = ROUND_None(
cvt_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
}
#else
distance = ROUND_None(
cvt_dist,
CUR.tt_metrics.compensations[CUR.opcode & 3] );
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
/* minimum distance test */
@ -6607,52 +6649,58 @@
}
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
B1 = CUR.zp1.cur[point].y;
if ( SUBPIXEL_HINTING )
{
B1 = CUR.zp1.cur[point].y;
/* Round moves if necessary */
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) )
distance = FT_PIX_ROUND( B1 + distance - cur_dist ) - B1 + cur_dist;
/* Round moves if necessary */
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) )
distance = FT_PIX_ROUND( B1 + distance - cur_dist ) - B1 + cur_dist;
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.opcode & 16 ) == 0 &&
( CUR.opcode & 8 ) == 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_COURIER_NEW_2_HACK ) )
distance += 64;
if ( CUR.ignore_x_mode &&
CUR.GS.freeVector.y != 0 &&
( CUR.opcode & 16 ) == 0 &&
( CUR.opcode & 8 ) == 0 &&
( CUR.sph_tweak_flags & SPH_TWEAK_COURIER_NEW_2_HACK ) )
distance += 64;
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR_Func_move( &CUR.zp1, point, distance - cur_dist );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
B2 = CUR.zp1.cur[point].y;
/* Reverse move if necessary */
if ( CUR.ignore_x_mode )
if ( SUBPIXEL_HINTING )
{
if ( CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 &&
( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 )
reverse_move = TRUE;
B2 = CUR.zp1.cur[point].y;
if ( ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
CUR.GS.freeVector.y != 0 &&
( B2 & 63 ) != 0 &&
( B1 & 63 ) != 0 )
reverse_move = TRUE;
/* Reverse move if necessary */
if ( CUR.ignore_x_mode )
{
if ( CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 &&
( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 )
reverse_move = TRUE;
if ( ( CUR.sph_tweak_flags &
SPH_TWEAK_DELTAP_SKIP_EXAGGERATED_VALUES ) &&
!reverse_move &&
FT_ABS( B1 - B2 ) >= 64 )
reverse_move = TRUE;
if ( ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
CUR.GS.freeVector.y != 0 &&
( B2 & 63 ) != 0 &&
( B1 & 63 ) != 0 )
reverse_move = TRUE;
if ( ( CUR.sph_tweak_flags &
SPH_TWEAK_DELTAP_SKIP_EXAGGERATED_VALUES ) &&
!reverse_move &&
FT_ABS( B1 - B2 ) >= 64 )
reverse_move = TRUE;
}
if ( reverse_move )
CUR_Func_move( &CUR.zp1, point, -( distance - cur_dist ) );
}
if ( reverse_move )
CUR_Func_move( &CUR.zp1, point, -( distance - cur_dist ) );
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
Fail:
@ -6681,7 +6729,8 @@
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode &&
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.iup_called &&
( CUR.sph_tweak_flags & SPH_TWEAK_NO_ALIGNRP_AFTER_IUP ) )
{
@ -7212,7 +7261,8 @@
point = 0;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode )
{
CUR.iup_called = 1;
if ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_IUP )
@ -7366,67 +7416,76 @@
B = B * 64 / ( 1L << CUR.GS.delta_shift );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
/*
* Allow delta move if
*
* - not using ignore_x_mode rendering
* - glyph is specifically set to allow it
* - glyph is composite and freedom vector is not subpixel vector
*/
if ( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_DO_DELTAP ) ||
( CUR.is_composite && CUR.GS.freeVector.y != 0 ) )
CUR_Func_move( &CUR.zp0, A, B );
/* Otherwise apply subpixel hinting and compatibility mode rules */
else if ( CUR.ignore_x_mode )
if ( SUBPIXEL_HINTING )
{
if ( CUR.GS.freeVector.y != 0 )
B1 = CUR.zp0.cur[A].y;
else
B1 = CUR.zp0.cur[A].x;
#if 0
/* Standard Subpixel Hinting: Allow y move. */
/* This messes up dejavu and may not be needed... */
if ( !CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 )
/*
* Allow delta move if
*
* - not using ignore_x_mode rendering
* - glyph is specifically set to allow it
* - glyph is composite and freedom vector is not subpixel
* vector
*/
if ( !CUR.ignore_x_mode ||
( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_DO_DELTAP ) ||
( CUR.is_composite && CUR.GS.freeVector.y != 0 ) )
CUR_Func_move( &CUR.zp0, A, B );
else
#endif
/* Compatibility Mode: Allow x or y move if point touched in */
/* Y direction. */
if ( CUR.face->sph_compatibility_mode &&
!( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) )
/* Otherwise apply subpixel hinting and */
/* compatibility mode rules */
else if ( CUR.ignore_x_mode )
{
/* save the y value of the point now; compare after move */
B1 = CUR.zp0.cur[A].y;
if ( CUR.GS.freeVector.y != 0 )
B1 = CUR.zp0.cur[A].y;
else
B1 = CUR.zp0.cur[A].x;
if ( ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) )
B = FT_PIX_ROUND( B1 + B ) - B1;
/* Allow delta move if using sph_compatibility_mode, */
/* IUP has not been called, and point is touched on Y. */
if ( !CUR.iup_called &&
( CUR.zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
#if 0
/* Standard Subpixel Hinting: Allow y move. */
/* This messes up dejavu and may not be needed... */
if ( !CUR.face->sph_compatibility_mode &&
CUR.GS.freeVector.y != 0 )
CUR_Func_move( &CUR.zp0, A, B );
else
#endif /* 0 */
/* Compatibility Mode: Allow x or y move if point touched in */
/* Y direction. */
if ( CUR.face->sph_compatibility_mode &&
!( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) )
{
/* save the y value of the point now; compare after move */
B1 = CUR.zp0.cur[A].y;
if ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
B = FT_PIX_ROUND( B1 + B ) - B1;
/* Allow delta move if using sph_compatibility_mode, */
/* IUP has not been called, and point is touched on Y. */
if ( !CUR.iup_called &&
( CUR.zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
CUR_Func_move( &CUR.zp0, A, B );
}
B2 = CUR.zp0.cur[A].y;
/* Reverse this move if it results in a disallowed move */
if ( CUR.GS.freeVector.y != 0 &&
( ( CUR.face->sph_compatibility_mode &&
( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 ) ||
( ( CUR.sph_tweak_flags &
SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
( B1 & 63 ) != 0 &&
( B2 & 63 ) != 0 ) ) )
CUR_Func_move( &CUR.zp0, A, -B );
}
B2 = CUR.zp0.cur[A].y;
/* Reverse this move if it results in a disallowed move */
if ( CUR.GS.freeVector.y != 0 &&
( ( CUR.face->sph_compatibility_mode &&
( B1 & 63 ) == 0 &&
( B2 & 63 ) != 0 ) ||
( ( CUR.sph_tweak_flags &
SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
( B1 & 63 ) != 0 &&
( B2 & 63 ) != 0 ) ) )
CUR_Func_move( &CUR.zp0, A, -B );
}
#else
CUR_Func_move( &CUR.zp0, A, B );
#endif /* *TT_CONFIG_OPTION_SUBPIXEL_HINTING */
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
CUR_Func_move( &CUR.zp0, A, B );
}
}
else
@ -7562,7 +7621,9 @@
/* Selector Bit: 0 */
/* Return Bit(s): 0-7 */
/* */
if ( ( args[0] & 1 ) != 0 && CUR.ignore_x_mode )
if ( SUBPIXEL_HINTING &&
( args[0] & 1 ) != 0 &&
CUR.ignore_x_mode )
{
K = CUR.rasterizer_version;
FT_TRACE7(( "Setting rasterizer version %d\n",
@ -7571,7 +7632,7 @@
else
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
if ( ( args[0] & 1 ) != 0 )
K = 35;
K = TT_INTERPRETER_VERSION_35;
/********************************/
/* GLYPH ROTATED */
@ -7598,7 +7659,10 @@
K |= 1 << 12;
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode && CUR.rasterizer_version >= 35 )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode &&
CUR.rasterizer_version >= TT_INTERPRETER_VERSION_35 )
{
/********************************/
/* HINTING FOR GRAYSCALE */
@ -7661,7 +7725,9 @@
}
}
}
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
args[0] = K;
}
@ -8313,10 +8379,12 @@
case 0x2B: /* CALL */
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !CUR.ignore_x_mode ||
!CUR.iup_called ||
( CUR.iup_called &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NO_CALL_AFTER_IUP ) ) )
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
!CUR.iup_called ||
( CUR.iup_called &&
!( CUR.sph_tweak_flags &
SPH_TWEAK_NO_CALL_AFTER_IUP ) ) ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
Ins_CALL( EXEC_ARG_ args );
break;
@ -8337,10 +8405,12 @@
case 0x30: /* IUP */
case 0x31: /* IUP */
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( CUR.ignore_x_mode )
if ( SUBPIXEL_HINTING &&
CUR.ignore_x_mode )
CUR.iup_called = TRUE;
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
Ins_IUP( EXEC_ARG_ args );
Ins_IUP( EXEC_ARG_ args );
break;
case 0x32: /* SHP */
@ -8500,10 +8570,12 @@
case 0x5D: /* DELTAP1 */
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
if ( !CUR.ignore_x_mode ||
!CUR.iup_called ||
( CUR.iup_called &&
!( CUR.sph_tweak_flags & SPH_TWEAK_NO_DELTAP_AFTER_IUP ) ) )
if ( !SUBPIXEL_HINTING ||
( !CUR.ignore_x_mode ||
!CUR.iup_called ||
( CUR.iup_called &&
!( CUR.sph_tweak_flags &
SPH_TWEAK_NO_DELTAP_AFTER_IUP ) ) ) )
#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
Ins_DELTAP( EXEC_ARG_ args );
break;

9
src/truetype/ttobjs.c
View File

@ -21,6 +21,7 @@
#include FT_INTERNAL_STREAM_H
#include FT_TRUETYPE_TAGS_H
#include FT_INTERNAL_SFNT_H
#include FT_TRUETYPE_DRIVER_H
#include "ttgload.h"
#include "ttpload.h"
@ -1259,11 +1260,17 @@
if ( !TT_New_Context( driver ) )
return FT_THROW( Could_Not_Find_Context );
#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
driver->interpreter_version = TT_INTERPRETER_VERSION_38;
#else
driver->interpreter_version = TT_INTERPRETER_VERSION_35;
#endif
#else /* !TT_USE_BYTECODE_INTERPRETER */
FT_UNUSED( ttdriver );
#endif
#endif /* !TT_USE_BYTECODE_INTERPRETER */
return FT_Err_Ok;
}

5
src/truetype/ttobjs.h
View File

@ -347,11 +347,12 @@ FT_BEGIN_HEADER
/* */
typedef struct TT_DriverRec_
{
FT_DriverRec root;
FT_DriverRec root;
TT_ExecContext context; /* execution context */
TT_GlyphZoneRec zone; /* glyph loader points zone */
void* extension_component;
FT_UInt interpreter_version;
} TT_DriverRec;

7
src/truetype/ttsubpix.c
View File

@ -22,6 +22,7 @@
#include FT_INTERNAL_SFNT_H
#include FT_TRUETYPE_TAGS_H
#include FT_OUTLINE_H
#include FT_TRUETYPE_DRIVER_H
#include "ttsubpix.h"
@ -1027,9 +1028,9 @@
if ( loader->exec->sph_tweak_flags & SPH_TWEAK_RASTERIZER_35 )
{
if ( loader->exec->rasterizer_version != 35 )
if ( loader->exec->rasterizer_version != TT_INTERPRETER_VERSION_35 )
{
loader->exec->rasterizer_version = 35;
loader->exec->rasterizer_version = TT_INTERPRETER_VERSION_35;
loader->exec->size->cvt_ready = FALSE;
tt_size_ready_bytecode(
@ -1037,7 +1038,7 @@
FT_BOOL( loader->load_flags & FT_LOAD_PEDANTIC ) );
}
else
loader->exec->rasterizer_version = 35;
loader->exec->rasterizer_version = TT_INTERPRETER_VERSION_35;
}
else
{