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* src/smooth/ftsmooth.c, src/base/ftobjs.c, 

include/freetype/config/ftmodule.h: updated to correctly support
        sub-pixel rendering

        * include/freetype/cache/ftcimage.h, include/freetype/cache/ftcsbits.h,
        src/cache/ftcimage.c, src/cache/ftcsbit.c: updated to support sub-pixel
        rendering correctly. Definition of FTC_ImageTypeRec that replaces the
        obsolete FTC_ImageDesc, and has slightly different fields. The
        image type is now determined directly by "load_flags" values.

        * src/autohint/ahtypes.h, src/autohint/ahhint.c,
        src/pshinter/pshalgo3.c, src/pshinter/pshalgo3.h: various enhancements
        to the automatic and Postscript hinters !! and sub-pixel hinting now
        works correctly (see demo programs)
This commit is contained in:
David Turner 2002-09-08 21:29:11 +00:00
parent d6f74d3b66
commit 2e22c90f78
13 changed files with 504 additions and 568 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
ChangeLog
View File

@ -1,3 +1,20 @@
2002-09-08 David Turner <david@freetype.org>
* src/smooth/ftsmooth.c, src/base/ftobjs.c,
include/freetype/config/ftmodule.h: updated to correctly support
sub-pixel rendering
* include/freetype/cache/ftcimage.h, include/freetype/cache/ftcsbits.h,
src/cache/ftcimage.c, src/cache/ftcsbit.c: updated to support sub-pixel
rendering correctly. Definition of FTC_ImageTypeRec that replaces the
obsolete FTC_ImageDesc, and has slightly different fields. The
image type is now determined directly by "load_flags" values.
* src/autohint/ahtypes.h, src/autohint/ahhint.c,
src/pshinter/pshalgo3.c, src/pshinter/pshalgo3.h: various enhancements
to the automatic and Postscript hinters !! and sub-pixel hinting now
works correctly (see demo programs)
2002-09-05 Werner Lemberg <wl@gnu.org>
* src/cid/cidobjs.c (CID_Size_Init): Renamed to...

101
include/freetype/cache/ftcimage.h vendored
View File

@ -53,65 +53,43 @@ FT_BEGIN_HEADER
/*************************************************************************/
#define FTC_IMAGE_FORMAT( x ) ( (x) & 7 )
#define ftc_image_format_bitmap 0x0000
#define ftc_image_format_outline 0x0001
#define ftc_image_format_mask 0x000F
#define ftc_image_flag_monochrome 0x0010
#define ftc_image_flag_unhinted 0x0020
#define ftc_image_flag_autohinted 0x0040
#define ftc_image_flag_unscaled 0x0080
#define ftc_image_flag_no_sbits 0x0100
/* monochrome bitmap */
#define ftc_image_mono ftc_image_format_bitmap | \
ftc_image_flag_monochrome
/* anti-aliased bitmap */
#define ftc_image_grays ftc_image_format_bitmap
/* scaled outline */
#define ftc_image_outline ftc_image_format_outline
/*************************************************************************/
/* */
/* <Struct> */
/* FTC_ImageDesc */
/* */
/* <Description> */
/* A simple structure used to describe a given glyph image category. */
/* Note that this is different from @FTC_Image_Desc. */
/* */
/* <Fields> */
/* size :: An @FTC_SizeRec used to describe the glyph's face and */
/* size. */
/* */
/* type :: The glyph image's type. Note that it is a 32-bit uint. */
/* */
/* <Note> */
/* This type deprecates @FTC_Image_Desc. */
/* */
typedef struct FTC_ImageDesc_
/**************************************************************************
*
* @struct: FTC_ImageTypeRec
*
* @description:
* a simple structure used to describe the type of glyph image to be
* loaded into the cache
*
* @fields:
* font :: An @FTC_FontRec used to describe the glyph's face and size
* flags :: the load flags to be applied when loading the glyph, see
* the @FT_LOAD_XXX constants for details
*
* @note:
* this type completely replaces the @FTC_Image_Desc structure which is
* now obsolete..
*/
typedef struct FTC_ImageTypeRec_
{
FTC_FontRec font;
FT_UInt32 type;
FT_Int32 flags;
} FTC_ImageDesc;
} FTC_ImageTypeRec;
typedef struct FTC_ImageTypeRec_* FTC_ImageType;
/* */
#define FTC_IMAGE_DESC_COMPARE( d1, d2 ) \
#define FTC_IMAGE_TYPE_COMPARE( d1, d2 ) \
( FTC_FONT_COMPARE( &(d1)->font, &(d2)->font ) && \
(d1)->type == (d2)->type )
(d1)->flags == (d2)->flags )
#define FTC_IMAGE_DESC_HASH( d ) \
#define FTC_IMAGE_TYPE_HASH( d ) \
(FT_UFast)( FTC_FONT_HASH( &(d)->font ) ^ \
( (d)->type << 4 ) )
( (d)->flags << 4 ) )
/*************************************************************************/
@ -160,7 +138,7 @@ FT_BEGIN_HEADER
/* <Input> */
/* cache :: A handle to the source glyph image cache. */
/* */
/* desc :: A pointer to a glyph image descriptor. */
/* type :: A pointer to a glyph image type descriptor. */
/* */
/* gindex :: The glyph index to retrieve. */
/* */
@ -193,13 +171,36 @@ FT_BEGIN_HEADER
/* */
FT_EXPORT( FT_Error )
FTC_ImageCache_Lookup( FTC_ImageCache cache,
FTC_ImageDesc* desc,
FTC_ImageType type,
FT_UInt gindex,
FT_Glyph *aglyph,
FTC_Node *anode );
/* */
#define ftc_image_format( x ) ( (x) & 7 )
#define ftc_image_format_bitmap 0x0000
#define ftc_image_format_outline 0x0001
#define ftc_image_format_mask 0x000F
#define ftc_image_flag_monochrome 0x0010
#define ftc_image_flag_unhinted 0x0020
#define ftc_image_flag_autohinted 0x0040
#define ftc_image_flag_unscaled 0x0080
#define ftc_image_flag_no_sbits 0x0100
/* monochrome bitmap */
#define ftc_image_mono ftc_image_format_bitmap | \
ftc_image_flag_monochrome
/* anti-aliased bitmap */
#define ftc_image_grays ftc_image_format_bitmap
/* scaled outline */
#define ftc_image_outline ftc_image_format_outline
/*************************************************************************/
/* */

12
include/freetype/cache/ftcsbits.h vendored
View File

@ -72,7 +72,7 @@ FT_BEGIN_HEADER
/* */
/* format :: The format of the glyph bitmap (monochrome or gray). */
/* */
/* num_grays :: The number of gray levels. */
/* max_grays :: maximum gray level value, from 1 to 255 */
/* */
/* pitch :: The number of bytes per bitmap line. May be positive */
/* or negative. */
@ -91,8 +91,8 @@ FT_BEGIN_HEADER
FT_Char top;
FT_Byte format;
FT_Short num_grays; /* XXX: Should be FT_Byte. See ftcsbits.c */
FT_Char pitch;
FT_Byte max_grays;
FT_Short pitch;
FT_Char xadvance;
FT_Char yadvance;
@ -113,7 +113,7 @@ FT_BEGIN_HEADER
/* implemented by @FTC_ImageCache. */
/* */
typedef struct FTC_SBitCacheRec_* FTC_SBitCache;
/*************************************************************************/
/* */
@ -160,7 +160,7 @@ FT_BEGIN_HEADER
/* <Input> */
/* cache :: A handle to the source sbit cache. */
/* */
/* desc :: A pointer to the glyph image descriptor. */
/* type :: A pointer to the glyph image type descriptor. */
/* */
/* gindex :: The glyph index. */
/* */
@ -195,7 +195,7 @@ FT_BEGIN_HEADER
/* */
FT_EXPORT( FT_Error )
FTC_SBitCache_Lookup( FTC_SBitCache cache,
FTC_ImageDesc* desc,
FTC_ImageType type,
FT_UInt gindex,
FTC_SBit *sbit,
FTC_Node *anode );

2
include/freetype/config/ftmodule.h
View File

@ -9,6 +9,8 @@ FT_USE_MODULE(pshinter_module_class)
FT_USE_MODULE(ft_raster1_renderer_class)
FT_USE_MODULE(sfnt_module_class)
FT_USE_MODULE(ft_smooth_renderer_class)
FT_USE_MODULE(ft_smooth_lcd_renderer_class)
FT_USE_MODULE(ft_smooth_lcdv_renderer_class)
FT_USE_MODULE(tt_driver_class)
FT_USE_MODULE(t1_driver_class)
FT_USE_MODULE(t42_driver_class)

329
include/freetype/freetype.h
View File

@ -2009,202 +2009,147 @@ FT_BEGIN_HEADER
FT_Int32 load_flags );
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_NO_SCALE */
/* */
/* <Description> */
/* A bit field constant, used with @FT_Load_Glyph to indicate that */
/* the vector outline being loaded should not be scaled to 26.6 */
/* fractional pixels, but kept in notional units. */
/* */
#define FT_LOAD_NO_SCALE 0x1
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_NO_HINTING */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the vector outline being loaded should not be fitted to the pixel */
/* grid but simply scaled to 26.6 fractional pixels. */
/* */
/* This flag is ignored if FT_LOAD_NO_SCALE is set. */
/* */
#define FT_LOAD_NO_HINTING 0x2
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_RENDER */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the function should load the glyph and immediately convert it into */
/* a bitmap, if necessary, by calling @FT_Render_Glyph. */
/* */
/* Note that by default, @FT_Load_Glyph loads the glyph image in its */
/* native format. */
/* */
#define FT_LOAD_RENDER 0x4
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_NO_BITMAP */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the function should not load the bitmap or pixmap of a given */
/* glyph. This is useful when you do not want to load the embedded */
/* bitmaps of scalable formats, as the native glyph image will be */
/* loaded, and can then be rendered through @FT_Render_Glyph. */
/* */
#define FT_LOAD_NO_BITMAP 0x8
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_VERTICAL_LAYOUT */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the glyph image should be prepared for vertical layout. This */
/* basically means that `face.glyph.advance' will correspond to the */
/* vertical advance height (instead of the default horizontal */
/* advance width), and that the glyph image will translated to match */
/* the vertical bearings positions. */
/* */
#define FT_LOAD_VERTICAL_LAYOUT 0x10
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_FORCE_AUTOHINT */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the function should try to auto-hint the glyphs, even if a driver */
/* specific hinter is available. */
/* */
/* Note that it is ignored if @FT_LOAD_NO_AUTOHINT is also set. */
/* */
#define FT_LOAD_FORCE_AUTOHINT 0x20
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_CROP_BITMAP */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the font driver should try to crop the bitmap (i.e. remove all */
/* space around its black bits) when loading it. For now, this */
/* really only works with embedded bitmaps in TrueType fonts. */
/* */
#define FT_LOAD_CROP_BITMAP 0x40
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_PEDANTIC */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the glyph loader should perform a pedantic bytecode */
/* interpretation. Many popular fonts come with broken glyph */
/* programs. When this flag is set, loading them will return an */
/* error. Otherwise, errors are ignored by the loader, sometimes */
/* resulting in ugly glyphs. */
/* */
#define FT_LOAD_PEDANTIC 0x80
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the glyph loader should ignore the global advance width defined */
/* in the font. As far as we know, this is only used by the */
/* X-TrueType font server, in order to deal correctly with the */
/* incorrect metrics contained in DynaLab's TrueType CJK fonts. */
/* */
/****************************************************************************
*
* @enum: FT_LOAD_XXX
*
* @description:
* a list of bit-field constants, used with @FT_Load_Glyph to indicate
* what kind of operations to perform during glyph loading
*
* @values:
* FT_LOAD_DEFAULT ::
* corresponding to 0, this value is used a default glyph load. In this
* case, the following will happen:
*
* 1/ FreeType will look for a bitmap for the glyph corresponding to
* the face's current size. If one is found, the function returns.
* the bitmap data can be accessed from the glyph slot (see note
* below)
*
* 2/ If no embedded bitmap is searched or found, FreeType looks for
* a scalable outline. If one is found, it is loaded from the font
* file, scaled to device pixels, then "hinted" to the pixel grid
* in order to optimize it. the outline data can be accessed from
* the glyph slot (see note below)
*
* Note that by default, the glyph loader doesn't render outlines into
* bitmaps. the following flags are used to modify this default behaviour
* to more specific and useful cases.
*
* FT_LOAD_NO_SCALE ::
* indicates that the vector outline being loaded should not be scaled
* to 26.6 fractional pixels, but kept in font units. Note that this
* also disables hinting and the loading of embedded bitmaps. You should
* only use it when you want to retrieve the original glyph outlines
* in font units.
*
* FT_LOAD_NO_HINTING ::
* indicates that the glyph outlines should not be hinted after their
* scaling to device pixels. This generally generates "blurrier" glyphs
* in anti-aliased modes.
*
* this flag is ignored if @FT_LOAD_NO_SCALE is set
*
* FT_LOAD_RENDER ::
* indicates that the glyph outline should be rendered immediately into
* a bitmap before the glyph loader returns. By default, the glyph is
* rendered for the @FT_RENDER_MODE_NORMAL mode, which corresponds to
* 8-bit anti-aliased bitmaps using 256 opacity levels. You can use
* either @FT_LOAD_TARGET_MONO or @FT_LOAD_MONOCHROME to render
* 1-bit monochrome bitmaps
*
* This flag is ignored if @FT_LOAD_NO_SCALE is set
*
*
* FT_LOAD_NO_BITMAP ::
* indicates that you do not want to look for bitmaps when loading
* the glyph. Only scalable outlines will be loaded when available,
* and scaled/hinted/rendered depending on other bit flags
*
* this does not prevent you from rendering outlines to bitmaps
* with @FT_LOAD_RENDER however.
*
* FT_LOAD_VERTICAL_LAYOUT:
* indicates that the glyph image should be prepared for vertical
* text layout. This basically means that 'face.glyph.advance' will
* correspond to the vertical advance height (instead of the default
* horizontal advance width), and that the glyph image will be
* translated to match the vertical bearings positions
*
* FT_LOAD_FORCE_AUTOHINT ::
* indicates that you want to force the use of the FreeType auto-hinter
* when a glyph outline is loaded. You shouldn't need this in a typical
* application, since it's mostly used to experiment with its algorithm
*
* FT_LOAD_CROP_BITMAP ::
* indicates that the glyph loader should try to crop the bitmap (i.e.
* remove all space around its black bits) when loading it. This is
* only useful when loading embedded bitmaps in certain fonts, since
* bitmaps rendered with @FT_LOAD_RENDER are always cropped by default
*
* FT_LOAD_PEDANTIC ::
* indicates that the glyph loader should perform pedantic verifications
* during glyph loading. This is mostly used to detect broken glyphs in
* fonts. By default, FreeType will always try to deal with such cases.
*
* FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ::
* indicates that the glyph loader should ignore the global advance
* width defined in the font. As far as we know, this is only used by the
* X-TrueType font server, in order to deal correctly with the incorrect
* metrics contained in DynaLab's TrueType CJK fonts.
*
* FT_LOAD_NO_RECURSE ::
* this flag is only used internally. It merely indicates that the glyph
* loader should not load composite glyphs recursively. Instead, it should
* set the 'num_subglyph' and 'subglyphs' values of the glyph slot
* accordingly, and set "glyph->format" to @FT_GLYPH_FORMAT_COMPOSITE
*
* the description of sub-glyphs is not available to client applications
* for now
*
* FT_LOAD_IGNORE_TRANSFORM ::
* indicates that the glyph loader should not try to transform the
* loaded glyph image. This doesn't prevent scaling/hinting/rendering
*
* FT_LOAD_MONOCHROME ::
* this flag is used with @FT_LOAD_RENDER to indicate that you want
* to render a 1-bit monochrome glyph bitmap from a vectorial outline.
*
* note that this has no effect on the hinting algorithm used by the
* glyph loader. You'd better use @FT_LOAD_TARGET_MONO if you want to
* render monochrome-optimized glyph images instead.
*
* FT_LOAD_LINEAR_DESIGN ::
* indicates that the function should return the linearly scaled metrics
* expressed in original font units, instead of the default 16.16 pixel
* values
*
* FT_LOAD_NO_AUTOHINT ::
* indicates that the auto-hinter should never be used to hint glyph
* outlines. This doesn't prevent native format-specific hinters from
* being used. This can be important for certain fonts where un-hinted
* output is better than auto-hinted one.
*
*
*
*
*
*/
#define FT_LOAD_NO_SCALE 0x1
#define FT_LOAD_NO_HINTING 0x2
#define FT_LOAD_RENDER 0x4
#define FT_LOAD_NO_BITMAP 0x8
#define FT_LOAD_VERTICAL_LAYOUT 0x10
#define FT_LOAD_FORCE_AUTOHINT 0x20
#define FT_LOAD_CROP_BITMAP 0x40
#define FT_LOAD_PEDANTIC 0x80
#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 0x200
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_NO_RECURSE */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the glyph loader should not load composite glyph recursively. */
/* Rather, when a composite glyph is encountered, it should set */
/* the values of `num_subglyphs' and `subglyphs', as well as set */
/* `face->glyph.format' to FT_GLYPH_FORMAT_COMPOSITE. */
/* */
/* This is for use by the auto-hinter and possibly other tools. */
/* For nearly all applications, this flags should be left unset */
/* when invoking @FT_Load_Glyph. */
/* */
/* Note that the flag forces the load of unscaled glyphs. */
/* */
#define FT_LOAD_NO_RECURSE 0x400
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_IGNORE_TRANSFORM */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the glyph loader should not try to transform the loaded glyph */
/* image. */
/* */
#define FT_LOAD_IGNORE_TRANSFORM 0x800
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_MONOCHROME */
/* */
/* <Description> */
/* Only used with FT_LOAD_RENDER set, it indicates that the returned */
/* glyph image should be 1-bit monochrome. This really tells the */
/* glyph loader to use `FT_RENDER_MODE_MONO' when calling */
/* @FT_Render_Glyph. */
/* */
#define FT_LOAD_NO_RECURSE 0x400
#define FT_LOAD_IGNORE_TRANSFORM 0x800
#define FT_LOAD_MONOCHROME 0x1000
/*************************************************************************/
/* */
/* <Constant> */
/* FT_LOAD_LINEAR_DESIGN */
/* */
/* <Description> */
/* A bit-field constant, used with @FT_Load_Glyph to indicate that */
/* the function should return the linearly scaled metrics expressed */
/* in original font units, instead of the default 16.16 pixel values. */
/* */
#define FT_LOAD_LINEAR_DESIGN 0x2000
/* temporary hack! */
#define FT_LOAD_SBITS_ONLY 0x4000

58
src/autohint/ahhint.c
View File

@ -104,42 +104,42 @@
sign = 1;
}
if ( ( vertical && hinter->no_vert_snapping ) ||
( !vertical && hinter->no_horz_snapping ) )
if ( ( vertical && !hinter->do_vert_snapping ) ||
( !vertical && !hinter->do_horz_snapping ) )
{
/* smooth hinting process, very lightly quantize the stem width */
/* */
if ( dist < 64 )
dist = 64;
{
FT_Pos delta = dist - globals->stds[vertical];
if ( delta < 0 )
delta = -delta;
if ( delta < 40 )
{
dist = globals->stds[vertical];
if ( dist < 32 )
dist = 32;
if ( dist < 48 )
dist = 48;
}
if ( dist < 3 * 64 )
{
delta = ( dist & 63 );
dist &= -64;
if ( delta < 10 )
dist += delta;
else if ( delta < 32 )
dist += 10;
else if ( delta < 54 )
dist += 54;
else
dist += delta;
}
@ -154,7 +154,7 @@
if ( vertical )
{
dist = ah_snap_width( globals->heights, globals->num_heights, dist );
/* in the case of vertical hinting, always round */
/* the stem heights to integer pixels */
if ( dist >= 64 )
@ -165,7 +165,7 @@
else
{
dist = ah_snap_width( globals->widths, globals->num_widths, dist );
if ( hinter->flags & AH_HINTER_MONOCHROME )
{
/* monochrome horizontal hinting: snap widths to integer pixels */
@ -182,7 +182,7 @@
/* is between 1 and 2 pixels to an integer, otherwise nothing */
if ( dist < 48 )
dist = ( dist + 64 ) >> 1;
else if ( dist < 128 )
dist = ( dist + 22 ) & -64;
else
@ -285,10 +285,10 @@
int has_serifs = 0;
if ( hinter->no_horz_hints && !dimension )
if ( !hinter->do_horz_hints && !dimension )
goto Next_Dimension;
if ( hinter->no_vert_hints && dimension )
if ( !hinter->do_vert_hints && dimension )
goto Next_Dimension;
/* we begin by aligning all stems relative to the blue zone */
@ -1169,7 +1169,7 @@
/* perform feature detection */
ah_outline_detect_features( outline );
if ( !hinter->no_vert_hints )
if ( hinter->do_vert_hints )
{
ah_outline_compute_blue_edges( outline, hinter->globals );
ah_outline_scale_blue_edges( outline, hinter->globals );
@ -1439,23 +1439,23 @@
ah_loader_rewind( hinter->loader );
/* reset hinting flags according to load flags and current render target */
hinter->no_horz_hints = FT_BOOL( load_flags & FT_LOAD_NO_AUTOHINT );
hinter->no_vert_hints = FT_BOOL( load_flags & FT_LOAD_NO_AUTOHINT );
hinter->do_horz_hints = !FT_BOOL( load_flags & FT_LOAD_NO_AUTOHINT );
hinter->do_vert_hints = !FT_BOOL( load_flags & FT_LOAD_NO_AUTOHINT );
#ifdef DEBUG_HINTER
hinter->no_horz_hints = ah_debug_disable_vert; /* not a bug, the meaning */
hinter->no_vert_hints = ah_debug_disable_horz; /* of h/v is inverted! */
#endif
hinter->do_horz_hints = !ah_debug_disable_vert; /* not a bug, the meaning */
hinter->do_vert_hints = !ah_debug_disable_horz; /* of h/v is inverted! */
#endif
/* we snap the width of vertical stems for the monochrome and */
/* horizontal LCD rendering targets only. Corresponds to X snapping. */
hinter->no_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_NORMAL ||
hint_mode == FT_RENDER_MODE_LCD_V );
hinter->do_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD );
/* we snap the width of horizontal stems for the monochrome and */
/* vertical LCD rendering targets only. Corresponds to Y snapping. */
hinter->no_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_NORMAL ||
hint_mode == FT_RENDER_MODE_LCD );
hinter->do_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD_V );
#if 1
load_flags = FT_LOAD_NO_SCALE

8
src/autohint/ahtypes.h
View File

@ -492,10 +492,10 @@ FT_BEGIN_HEADER
FT_Vector trans_delta;
FT_Matrix trans_matrix;
FT_Bool no_horz_hints; /* disable X hinting */
FT_Bool no_vert_hints; /* disable Y hinting */
FT_Bool no_horz_snapping; /* disable X stem size snapping */
FT_Bool no_vert_snapping; /* disable Y stem size snapping */
FT_Bool do_horz_hints; /* disable X hinting */
FT_Bool do_vert_hints; /* disable Y hinting */
FT_Bool do_horz_snapping; /* disable X stem size snapping */
FT_Bool do_vert_snapping; /* disable Y stem size snapping */
} AH_HinterRec, *AH_Hinter;

15
src/base/ftobjs.c
View File

@ -444,8 +444,8 @@
hinter = library->auto_hinter;
autohint =
FT_BOOL( hinter &&
!( load_flags & ( FT_LOAD_NO_SCALE |
FT_LOAD_NO_HINTING |
!( load_flags & ( FT_LOAD_NO_SCALE |
FT_LOAD_NO_HINTING |
FT_LOAD_NO_AUTOHINT ) ) &&
FT_DRIVER_IS_SCALABLE( driver ) &&
FT_DRIVER_USES_OUTLINES( driver ) );
@ -553,10 +553,13 @@
slot->format != FT_GLYPH_FORMAT_COMPOSITE &&
load_flags & FT_LOAD_RENDER )
{
error = FT_Render_Glyph( slot,
( load_flags & FT_LOAD_MONOCHROME )
? FT_RENDER_MODE_MONO
: FT_RENDER_MODE_NORMAL );
FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags );
if ( mode == FT_RENDER_MODE_NORMAL &&
(load_flags & FT_LOAD_MONOCHROME ) )
mode = FT_RENDER_MODE_MONO;
error = FT_Render_Glyph( slot, mode );
}
Exit:

94
src/cache/ftcimage.c vendored
View File

@ -42,7 +42,7 @@
typedef struct FTC_ImageQueryRec_
{
FTC_GlyphQueryRec gquery;
FTC_ImageDesc desc;
FTC_ImageTypeRec type;
} FTC_ImageQueryRec, *FTC_ImageQuery;
@ -54,7 +54,7 @@
typedef struct FTC_ImageFamilyRec_
{
FTC_GlyphFamilyRec gfam;
FTC_ImageDesc desc;
FTC_ImageTypeRec type;
} FTC_ImageFamilyRec, *FTC_ImageFamily;
@ -106,41 +106,13 @@
/* we will now load the glyph image */
error = FTC_Manager_Lookup_Size( FTC_FAMILY( ifam )->cache->manager,
&ifam->desc.font,
&ifam->type.font,
&face, &size );
if ( !error )
{
FT_UInt gindex = FTC_GLYPH_NODE_GINDEX( inode );
FT_UInt load_flags = FT_LOAD_DEFAULT;
FT_UInt type = ifam->desc.type;
if ( FTC_IMAGE_FORMAT( type ) == ftc_image_format_bitmap )
{
load_flags |= FT_LOAD_RENDER;
if ( type & ftc_image_flag_monochrome )
load_flags |= FT_LOAD_MONOCHROME;
/* disable embedded bitmaps loading if necessary */
if ( type & ftc_image_flag_no_sbits )
load_flags |= FT_LOAD_NO_BITMAP;
}
else if ( FTC_IMAGE_FORMAT( type ) == ftc_image_format_outline )
{
/* disable embedded bitmaps loading */
load_flags |= FT_LOAD_NO_BITMAP;
if ( type & ftc_image_flag_unscaled )
load_flags |= FT_LOAD_NO_SCALE;
}
if ( type & ftc_image_flag_unhinted )
load_flags |= FT_LOAD_NO_HINTING;
if ( type & ftc_image_flag_autohinted )
load_flags |= FT_LOAD_FORCE_AUTOHINT;
error = FT_Load_Glyph( face, gindex, load_flags );
error = FT_Load_Glyph( face, gindex, ifam->type.flags );
if ( !error )
{
if ( face->glyph->format == FT_GLYPH_FORMAT_BITMAP ||
@ -231,16 +203,16 @@
FT_Face face;
ifam->desc = iquery->desc;
ifam->type = iquery->type;
/* we need to compute "iquery.item_total" now */
error = FTC_Manager_Lookup_Face( manager,
iquery->desc.font.face_id,
iquery->type.font.face_id,
&face );
if ( !error )
{
error = ftc_glyph_family_init( FTC_GLYPH_FAMILY( ifam ),
FTC_IMAGE_DESC_HASH( &ifam->desc ),
FTC_IMAGE_TYPE_HASH( &ifam->type ),
1,
face->num_glyphs,
FTC_GLYPH_QUERY( iquery ),
@ -258,7 +230,7 @@
FT_Bool result;
result = FT_BOOL( FTC_IMAGE_DESC_COMPARE( &ifam->desc, &iquery->desc ) );
result = FT_BOOL( FTC_IMAGE_TYPE_COMPARE( &ifam->type, &iquery->type ) );
if ( result )
FTC_GLYPH_FAMILY_FOUND( ifam, iquery );
@ -314,7 +286,7 @@
FT_EXPORT_DEF( FT_Error )
FTC_ImageCache_Lookup( FTC_ImageCache cache,
FTC_ImageDesc* desc,
FTC_ImageType type,
FT_UInt gindex,
FT_Glyph *aglyph,
FTC_Node *anode )
@ -332,7 +304,7 @@
*anode = NULL;
iquery.gquery.gindex = gindex;
iquery.desc = *desc;
iquery.type = *type;
error = ftc_cache_lookup( FTC_CACHE( cache ),
FTC_QUERY( &iquery ),
@ -368,17 +340,55 @@
FT_UInt gindex,
FT_Glyph *aglyph )
{
FTC_ImageDesc desc0;
FTC_ImageTypeRec type0;
if ( !desc )
return FTC_Err_Invalid_Argument;
desc0.font = desc->font;
desc0.type = (FT_UInt32)desc->image_type;
type0.font = desc->font;
/* convert image type flags to load flags */
{
FT_UInt load_flags = FT_LOAD_DEFAULT;
FT_UInt type = desc->image_type;
/* determine load flags, depending on the font description's */
/* image type */
if ( ftc_image_format( type ) == ftc_image_format_bitmap )
{
if ( type & ftc_image_flag_monochrome )
load_flags |= FT_LOAD_MONOCHROME;
/* disable embedded bitmaps loading if necessary */
if ( type & ftc_image_flag_no_sbits )
load_flags |= FT_LOAD_NO_BITMAP;
}
else
{
/* we want an outline, don't load embedded bitmaps */
load_flags |= FT_LOAD_NO_BITMAP;
if ( type & ftc_image_flag_unscaled )
load_flags |= FT_LOAD_NO_SCALE;
}
/* always render glyphs to bitmaps */
load_flags |= FT_LOAD_RENDER;
if ( type & ftc_image_flag_unhinted )
load_flags |= FT_LOAD_NO_HINTING;
if ( type & ftc_image_flag_autohinted )
load_flags |= FT_LOAD_FORCE_AUTOHINT;
type0.flags = load_flags;
}
return FTC_ImageCache_Lookup( (FTC_ImageCache)icache,
&desc0,
&type0,
gindex,
aglyph,
NULL );

113
src/cache/ftcsbits.c vendored
View File

@ -46,7 +46,7 @@
typedef struct FTC_SBitQueryRec_
{
FTC_GlyphQueryRec gquery;
FTC_ImageDesc desc;
FTC_ImageTypeRec type;
} FTC_SBitQueryRec, *FTC_SBitQuery;
@ -60,7 +60,7 @@
typedef struct FTC_SBitFamilyRec_
{
FTC_GlyphFamilyRec gfam;
FTC_ImageDesc desc;
FTC_ImageTypeRec type;
} FTC_SBitFamilyRec;
@ -104,8 +104,8 @@
ftc_sbit_node_done( FTC_SBitNode snode,
FTC_Cache cache )
{
FTC_SBit sbit = snode->sbits;
FT_UInt count = FTC_GLYPH_NODE( snode )->item_count;
FTC_SBit sbit = snode->sbits;
FT_UInt count = FTC_GLYPH_NODE( snode )->item_count;
FT_Memory memory = cache->memory;
@ -142,48 +142,14 @@
sbit = snode->sbits + ( gindex - gnode->item_start );
error = FTC_Manager_Lookup_Size( manager, &sfam->desc.font,
error = FTC_Manager_Lookup_Size( manager, &sfam->type.font,
&face, &size );
if ( !error )
{
FT_UInt load_flags = FT_LOAD_DEFAULT;
FT_UInt type = sfam->desc.type;
/* determine load flags, depending on the font description's */
/* image type */
if ( FTC_IMAGE_FORMAT( type ) == ftc_image_format_bitmap )
{
if ( type & ftc_image_flag_monochrome )
load_flags |= FT_LOAD_MONOCHROME;
/* disable embedded bitmaps loading if necessary */
if ( type & ftc_image_flag_no_sbits )
load_flags |= FT_LOAD_NO_BITMAP;
}
else
{
FT_ERROR((
"ftc_sbit_node_load: cannot load scalable glyphs in an"
" sbit cache, please check your arguments!\n" ));
error = FTC_Err_Invalid_Argument;
goto Exit;
}
/* always render glyphs to bitmaps */
load_flags |= FT_LOAD_RENDER;
if ( type & ftc_image_flag_unhinted )
load_flags |= FT_LOAD_NO_HINTING;
if ( type & ftc_image_flag_autohinted )
load_flags |= FT_LOAD_FORCE_AUTOHINT;
/* by default, indicates a `missing' glyph */
sbit->buffer = 0;
error = FT_Load_Glyph( face, gindex, load_flags );
error = FT_Load_Glyph( face, gindex, sfam->type.flags | FT_LOAD_RENDER );
if ( !error )
{
FT_Int temp;
@ -221,13 +187,7 @@
sbit->xadvance = (FT_Char)xadvance;
sbit->yadvance = (FT_Char)yadvance;
sbit->format = (FT_Byte)bitmap->pixel_mode;
/* XXX: Fixme: We don't handle the number of gray levels */
/* consistently -- we say num_grays == 1 for */
/* monochrome but num_grays == 256 for gray. It */
/* would be better to make this variable hold the */
/* highest possible value so that it fits into */
/* a single byte. */
sbit->num_grays = bitmap->num_grays;
sbit->max_grays = (FT_Byte)(bitmap->num_grays - 1);
/* grab the bitmap when possible - this is a hack! */
if ( slot->flags & FT_GLYPH_OWN_BITMAP )
@ -380,16 +340,16 @@
FT_Face face;
sfam->desc = squery->desc;
sfam->type = squery->type;
/* we need to compute "cquery.item_total" now */
error = FTC_Manager_Lookup_Face( manager,
squery->desc.font.face_id,
squery->type.font.face_id,
&face );
if ( !error )
{
error = ftc_glyph_family_init( FTC_GLYPH_FAMILY( sfam ),
FTC_IMAGE_DESC_HASH( &sfam->desc ),
FTC_IMAGE_TYPE_HASH( &sfam->type ),
FTC_SBIT_ITEMS_PER_NODE,
face->num_glyphs,
FTC_GLYPH_QUERY( squery ),
@ -410,7 +370,7 @@
/* we need to set the "cquery.cset" field or our query for */
/* faster glyph comparisons in ftc_sbit_node_compare */
/* */
result = FT_BOOL( FTC_IMAGE_DESC_COMPARE( &sfam->desc, &squery->desc ) );
result = FT_BOOL( FTC_IMAGE_TYPE_COMPARE( &sfam->type, &squery->type ) );
if ( result )
FTC_GLYPH_FAMILY_FOUND( sfam, squery );
@ -481,7 +441,7 @@
FT_EXPORT_DEF( FT_Error )
FTC_SBitCache_Lookup( FTC_SBitCache cache,
FTC_ImageDesc* desc,
FTC_ImageType type,
FT_UInt gindex,
FTC_SBit *ansbit,
FTC_Node *anode )
@ -501,7 +461,7 @@
*anode = NULL;
squery.gquery.gindex = gindex;
squery.desc = *desc;
squery.type = *type;
error = ftc_sbit_cache_lookup( FTC_CACHE( cache ),
FTC_QUERY( &squery ),
@ -536,17 +496,56 @@
FT_UInt gindex,
FTC_SBit *ansbit )
{
FTC_ImageDesc desc0;
FTC_ImageTypeRec type0;
if ( !desc )
return FTC_Err_Invalid_Argument;
desc0.font = desc->font;
desc0.type = (FT_UInt32)desc->image_type;
type0.font = desc->font;
type0.flags = 0;
/* convert image type flags to load flags */
{
FT_UInt load_flags = FT_LOAD_DEFAULT;
FT_UInt type = desc->image_type;
/* determine load flags, depending on the font description's */
/* image type */
if ( ftc_image_format( type ) == ftc_image_format_bitmap )
{
if ( type & ftc_image_flag_monochrome )
load_flags |= FT_LOAD_MONOCHROME;
/* disable embedded bitmaps loading if necessary */
if ( type & ftc_image_flag_no_sbits )
load_flags |= FT_LOAD_NO_BITMAP;
}
else
{
/* we want an outline, don't load embedded bitmaps */
load_flags |= FT_LOAD_NO_BITMAP;
if ( type & ftc_image_flag_unscaled )
load_flags |= FT_LOAD_NO_SCALE;
}
/* always render glyphs to bitmaps */
load_flags |= FT_LOAD_RENDER;
if ( type & ftc_image_flag_unhinted )
load_flags |= FT_LOAD_NO_HINTING;
if ( type & ftc_image_flag_autohinted )
load_flags |= FT_LOAD_FORCE_AUTOHINT;
type0.flags = load_flags;
}
return FTC_SBitCache_Lookup( (FTC_SBitCache)cache,
&desc0,
&type0,
gindex,
ansbit,
NULL );

289
src/pshinter/pshalgo3.c
View File

@ -332,6 +332,56 @@
/*************************************************************************/
/*************************************************************************/
static FT_Pos
psh3_dimension_quantize_len( PSH_Dimension dim,
FT_Pos len,
FT_Bool do_snapping )
{
if ( len <= 64 )
len = 64;
else
{
FT_Pos delta = len - dim->stdw.widths[0].cur;
if ( delta < 0 )
delta = -delta;
if ( delta < 40 )
{
len = dim->stdw.widths[0].cur;
if ( len < 48 )
len = 48;
}
if ( len < 3 * 64 )
{
delta = ( len & 63 );
len &= -64;
if ( delta < 10 )
len += delta;
else if ( delta < 32 )
len += 10;
else if ( delta < 54 )
len += 54;
else
len += delta;
}
else
len = ( len + 32 ) & -64;
}
if ( do_snapping )
len = ( len + 32 ) & -64;
return len;
}
#ifdef DEBUG_HINTER
static void
@ -390,15 +440,15 @@
FT_Pos pos = FT_MulFix( hint->org_pos, scale ) + delta;
FT_Pos len = FT_MulFix( hint->org_len, scale );
FT_Int no_snapping;
FT_Int do_snapping;
FT_Pos fit_center;
FT_Pos fit_len;
PSH_AlignmentRec align;
/* ignore stem alignments when requested through the hint flags */
if ( ( dimension == 0 && glyph->no_horz_hints ) ||
( dimension == 1 && glyph->no_vert_hints ) )
if ( ( dimension == 0 && !glyph->do_horz_hints ) ||
( dimension == 1 && !glyph->do_vert_hints ) )
{
hint->cur_pos = pos;
hint->cur_len = len;
@ -408,26 +458,10 @@
}
/* perform stem snapping when requested */
no_snapping = ( dimension == 0 && !glyph->no_horz_snapping ) ||
( dimension == 1 && !glyph->no_vert_snapping );
do_snapping = ( dimension == 0 && glyph->do_horz_snapping ) ||
( dimension == 1 && glyph->do_vert_snapping );
if ( !no_snapping )
{
/* compute fitted width/height */
fit_len = 0;
if ( hint->org_len )
{
fit_len = psh_dimension_snap_width( dim, hint->org_len );
if ( fit_len < 64 )
fit_len = 64;
else
fit_len = ( fit_len + 32 ) & -64;
}
}
else
fit_len = len;
hint->cur_len = fit_len;
hint->cur_len = fit_len = len;
/* check blue zones for horizontal stems */
align.align = PSH_BLUE_ALIGN_NONE;
@ -480,151 +514,64 @@
pos = par_cur_center + cur_delta - ( len >> 1 );
}
if ( !no_snapping )
hint->cur_pos = pos;
hint->cur_len = fit_len;
if ( len <= 64 )
{
/* normal processing */
if ( fit_len & 64 )
{
/* odd number of pixels */
fit_center = ( ( pos + ( len >> 1 ) ) & -64 ) + 32;
}
else
{
/* even number of pixels */
fit_center = ( pos + ( len >> 1 ) + 32 ) & -64;
}
hint->cur_pos = fit_center - ( fit_len >> 1 );
/* the stem is less than one pixel, we will center it */
/* around the nearest pixel center */
/* */
pos = ( pos + ( (len >> 1) & -64 ) );
len = 64;
}
else
{
#ifdef STRONGER
if ( len <= 64 )
{
/* the stem is less than one pixel, we will center it */
/* around the nearest pixel center */
/* */
pos = ( pos + ( (len >> 1) & -64 ) );
len = 64;
}
else
{
FT_Pos Delta = len - dim->stdw.widths[0].cur;
if ( Delta < 0 )
Delta = -Delta;
if ( Delta < 40 )
{
len = dim->stdw.widths[0].cur;
if ( len < 32 )
len = 32;
}
if ( len < 3 * 64 )
{
Delta = ( len & 63 );
len &= -64;
if ( Delta < 10 )
len += Delta;
else if ( Delta < 32 )
len += 10;
else if ( Delta < 54 )
len += 54;
else
len += Delta;
}
else
len = ( len + 32 ) & -64;
}
/* now that we have a good hinted stem width, try to position */
/* the stem along a pixel grid integer coordinate */
hint->cur_pos = pos + psh3_hint_snap_stem_side_delta( pos, len );
hint->cur_len = len;
#else /* !STRONGER */
/* Stems less than one pixel wide are easy - we want to
* make them as dark as possible, so they must fall within
* one pixel. If the stem is split between two pixels
* then snap the edge that is nearer to the pixel boundary
* to the pixel boundary
*/
if (len <= 64)
{
if ( ( pos + len + 63 ) / 64 != pos / 64 + 1 )
pos += psh3_hint_snap_stem_side_delta ( pos, len );
}
/* Position stems other to minimize the amount of mid-grays.
* There are, in general, two positions that do this,
* illustrated as A) and B) below.
*
* + + + +
*
* A) |--------------------------------|
* B) |--------------------------------|
* C) |--------------------------------|
*
* Position A) (split the excess stem equally) should be better
* for stems of width N + f where f < 0.5.
*
* Position B) (split the deficiency equally) should be better
* for stems of width N + f where f > 0.5.
*
* It turns out though that minimizing the total number of touched
* pixels is also important, so position C), with one edge
* aligned with a pixel boundary is actually preferable
* to A). There are also more possible positions for C) than
* for A) or B), so there will be less distortion of the overall
* character shape.
*/
else
{
FT_Fixed frac_len = len & 63;
FT_Fixed center = pos + ( len >> 1 );
FT_Fixed delta_a, delta_b;
if ( len & 64 )
{
delta_a = ( center & -64 ) + 32 - center;
delta_b = ( ( center + 32 ) & - 64 ) - center;
}
else
{
delta_a = ( ( center + 32 ) & - 64 ) - center;
delta_b = ( center & -64 ) + 32 - center;
}
/* We choose between B) and C) above based on the amount
* of fractional stem width: for small amounts, choose
* C) always; for large amounts, B) always; inbetween,
* pick whichever one involves less stem movement.
*/
if ( frac_len < 32 )
pos += psh3_hint_snap_stem_side_delta ( pos, len );
else if ( frac_len < 48 )
{
FT_Fixed side_delta =
psh3_hint_snap_stem_side_delta( pos, len );
if ( ABS( side_delta ) < ABS( delta_b ) )
pos += side_delta;
else
pos += delta_b;
}
else
pos += delta_b;
}
hint->cur_pos = pos;
#endif /* !STRONGER */
len = psh3_dimension_quantize_len( dim, len, 0 );
}
/* now that we have a good hinted stem width, try to position */
/* the stem along a pixel grid integer coordinate */
hint->cur_pos = pos + psh3_hint_snap_stem_side_delta( pos, len );
hint->cur_len = len;
}
}
if ( do_snapping )
{
pos = hint->cur_pos;
len = hint->cur_len;
if ( len < 64 )
len = 64;
else
len = ( len + 32 ) & -64;
switch ( align.align )
{
case PSH_BLUE_ALIGN_TOP:
hint->cur_pos = align.align_top - len;
hint->cur_len = len;
break;
case PSH_BLUE_ALIGN_BOT:
hint->cur_len = len;
break;
case PSH_BLUE_ALIGN_BOT | PSH_BLUE_ALIGN_TOP:
/* don't touch */
break;
default:
hint->cur_len = len;
if ( len & 64 )
pos = ( ( pos + ( len >> 1 ) ) & -64 ) + 32;
else
pos = ( pos + ( len >> 1 ) + 32 ) & -64;
hint->cur_pos = pos - ( len >> 1 );
hint->cur_len = len;
}
}
@ -1761,19 +1708,19 @@
#endif /* DEBUG_HINTER */
glyph->no_horz_hints = 0;
glyph->no_vert_hints = 0;
glyph->no_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_NORMAL ||
hint_mode == FT_RENDER_MODE_LCD_V );
glyph->no_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_NORMAL ||
hint_mode == FT_RENDER_MODE_LCD );
error = psh3_glyph_init( glyph, outline, ps_hints, globals );
if ( error )
goto Exit;
glyph->do_horz_hints = 1;
glyph->do_vert_hints = 1;
glyph->do_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD );
glyph->do_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD_V );
for ( dimension = 0; dimension < 2; dimension++ )
{
/* load outline coordinates into glyph */

10
src/pshinter/pshalgo3.h
View File

@ -30,7 +30,7 @@ FT_BEGIN_HEADER
/* handle to Hint structure */
typedef struct PSH3_HintRec_* PSH3_Hint;
/* hint bit-flags */
typedef enum
{
@ -217,10 +217,10 @@ FT_BEGIN_HEADER
FT_Int major_dir;
FT_Int minor_dir;
FT_Bool no_horz_hints;
FT_Bool no_vert_hints;
FT_Bool no_horz_snapping;
FT_Bool no_vert_snapping;
FT_Bool do_horz_hints;
FT_Bool do_vert_hints;
FT_Bool do_horz_snapping;
FT_Bool do_vert_snapping;
} PSH3_GlyphRec, *PSH3_Glyph;

24
src/smooth/ftsmooth.c
View File

@ -249,9 +249,15 @@
FT_UInt mode,
FT_Vector* origin )
{
return ft_smooth_render_generic( render, slot, mode, origin,
FT_RENDER_MODE_LCD,
3, 0 );
FT_Error error;
error = ft_smooth_render_generic( render, slot, mode, origin,
FT_RENDER_MODE_LCD,
3, 0 );
if ( !error )
slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD;
return error;
}
@ -262,9 +268,15 @@
FT_UInt mode,
FT_Vector* origin )
{
return ft_smooth_render_generic( render, slot, mode, origin,
FT_RENDER_MODE_LCD_V,
0, 3 );
FT_Error error;
error = ft_smooth_render_generic( render, slot, mode, origin,
FT_RENDER_MODE_LCD_V,
0, 3 );
if ( !error )
slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD_V;
return error;
}