core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttgload.c - Issue 815103002: Update freetype to 2.5.4.

Unified Diff: core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttgload.c

Issue 815103002: Update freetype to 2.5.4. (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master

Patch Set: Adjust GYP and GN Created 6 years ago

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Index: core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttgload.c

diff --git a/core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttgload.c b/core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttgload.c

deleted file mode 100644

index c32419b77d9a7e80e1bcb0855f2cc27e00b87db3..0000000000000000000000000000000000000000

--- a/core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttgload.c

+++ /dev/null

@@ -1,2337 +0,0 @@

-/***************************************************************************/

-/* */

-/* ttgload.c */

-/* */

-/* TrueType Glyph Loader (body). */

-/* */

-/* David Turner, Robert Wilhelm, and Werner Lemberg. */

-/* */

-/* This file is part of the FreeType project, and may only be used, */

-/* modified, and distributed under the terms of the FreeType project */

-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */

-/* this file you indicate that you have read the license and */

-/* understand and accept it fully. */

-/* */

-/***************************************************************************/

-#include "../../include/ft2build.h"

-#include "../../include/freetype/internal/ftdebug.h"

-#include "../../include/freetype/internal/ftcalc.h"

-#include "../../include/freetype/internal/ftstream.h"

-#include "../../include/freetype/internal/sfnt.h"

-#include "../../include/freetype/tttags.h"

-#include "../../include/freetype/ftoutln.h"

-#include "../../include/freetype/ftttdrv.h"

-#include "ttgload.h"

-#include "ttpload.h"

-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

-#include "ttgxvar.h"

-#endif

-#include "tterrors.h"

-#include "ttsubpix.h"

- /*************************************************************************/

- /* */

- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */

- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */

- /* messages during execution. */

- /* */

-#undef FT_COMPONENT

-#define FT_COMPONENT trace_ttgload

- /*************************************************************************/

- /* */

- /* Composite glyph flags. */

- /* */

-#define ARGS_ARE_WORDS 0x0001

-#define ARGS_ARE_XY_VALUES 0x0002

-#define ROUND_XY_TO_GRID 0x0004

-#define WE_HAVE_A_SCALE 0x0008

-/* reserved 0x0010 */

-#define MORE_COMPONENTS 0x0020

-#define WE_HAVE_AN_XY_SCALE 0x0040

-#define WE_HAVE_A_2X2 0x0080

-#define WE_HAVE_INSTR 0x0100

-#define USE_MY_METRICS 0x0200

-#define OVERLAP_COMPOUND 0x0400

-#define SCALED_COMPONENT_OFFSET 0x0800

-#define UNSCALED_COMPONENT_OFFSET 0x1000

- /*************************************************************************/

- /* */

- /* Return the horizontal metrics in font units for a given glyph. */

- /* */

- FT_LOCAL_DEF( void )

- TT_Get_HMetrics( TT_Face face,

- FT_UInt idx,

- FT_Short* lsb,

- FT_UShort* aw )

- {

- ( (SFNT_Service)face->sfnt )->get_metrics( face, 0, idx, lsb, aw );

- FT_TRACE5(( " advance width (font units): %d\n", *aw ));

- FT_TRACE5(( " left side bearing (font units): %d\n", *lsb ));

- }

- /*************************************************************************/

- /* */

- /* Return the vertical metrics in font units for a given glyph. */

- /* Greg Hitchcock from Microsoft told us that if there were no `vmtx' */

- /* table, typoAscender/Descender from the `OS/2' table would be used */

- /* instead, and if there were no `OS/2' table, use ascender/descender */

- /* from the `hhea' table. But that is not what Microsoft's rasterizer */

- /* apparently does: It uses the ppem value as the advance height, and */

- /* sets the top side bearing to be zero. */

- /* */

- FT_LOCAL_DEF( void )

- TT_Get_VMetrics( TT_Face face,

- FT_UInt idx,

- FT_Short* tsb,

- FT_UShort* ah )

- {

- if ( face->vertical_info )

- ( (SFNT_Service)face->sfnt )->get_metrics( face, 1, idx, tsb, ah );

-#if 1 /* Empirically determined, at variance with what MS said */

- else

- {

- *tsb = 0;

- *ah = face->root.units_per_EM;

- }

-#else /* This is what MS said to do. It isn't what they do, however. */

- else if ( face->os2.version != 0xFFFFU )

- {

- *tsb = face->os2.sTypoAscender;

- *ah = face->os2.sTypoAscender - face->os2.sTypoDescender;

- }

- else

- {

- *tsb = face->horizontal.Ascender;

- *ah = face->horizontal.Ascender - face->horizontal.Descender;

- }

-#endif

- FT_TRACE5(( " advance height (font units): %d\n", *ah ));

- FT_TRACE5(( " top side bearing (font units): %d\n", *tsb ));

- }

- static void

- tt_get_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_Short left_bearing = 0, top_bearing = 0;

- FT_UShort advance_width = 0, advance_height = 0;

- TT_Get_HMetrics( face, glyph_index,

- &left_bearing,

- &advance_width );

- TT_Get_VMetrics( face, glyph_index,

- &top_bearing,

- &advance_height );

- loader->left_bearing = left_bearing;

- loader->advance = advance_width;

- loader->top_bearing = top_bearing;

- loader->vadvance = advance_height;

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- 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 );

- }

-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */

- if ( !loader->linear_def )

- {

- loader->linear_def = 1;

- loader->linear = advance_width;

- }

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- static void

- tt_get_metrics_incr_overrides( TT_Loader loader,

- FT_UInt glyph_index )

- {

- TT_Face face = (TT_Face)loader->face;

- FT_Short left_bearing = 0, top_bearing = 0;

- FT_UShort advance_width = 0, advance_height = 0;

- /* If this is an incrementally loaded font check whether there are */

- /* overriding metrics for this glyph. */

- if ( face->root.internal->incremental_interface &&

- face->root.internal->incremental_interface->funcs->get_glyph_metrics )

- {

- FT_Incremental_MetricsRec metrics;

- FT_Error error;

- metrics.bearing_x = loader->left_bearing;

- metrics.bearing_y = 0;

- metrics.advance = loader->advance;

- metrics.advance_v = 0;

- error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(

- face->root.internal->incremental_interface->object,

- glyph_index, FALSE, &metrics );

- if ( error )

- goto Exit;

- left_bearing = (FT_Short)metrics.bearing_x;

- advance_width = (FT_UShort)metrics.advance;

-#if 0

- /* GWW: Do I do the same for vertical metrics? */

- metrics.bearing_x = 0;

- metrics.bearing_y = loader->top_bearing;

- metrics.advance = loader->vadvance;

- error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(

- face->root.internal->incremental_interface->object,

- glyph_index, TRUE, &metrics );

- if ( error )

- goto Exit;

- top_bearing = (FT_Short)metrics.bearing_y;

- advance_height = (FT_UShort)metrics.advance;

-#endif /* 0 */

- loader->left_bearing = left_bearing;

- loader->advance = advance_width;

- loader->top_bearing = top_bearing;

- loader->vadvance = advance_height;

- if ( !loader->linear_def )

- {

- loader->linear_def = 1;

- loader->linear = advance_width;

- }

- Exit:

- return;

- }

-#endif /* FT_CONFIG_OPTION_INCREMENTAL */

- /*************************************************************************/

- /* */

- /* Translates an array of coordinates. */

- /* */

- static void

- translate_array( FT_UInt n,

- FT_Vector* coords,

- FT_Pos delta_x,

- FT_Pos delta_y )

- {

- FT_UInt k;

- if ( delta_x )

- for ( k = 0; k < n; k++ )

- coords[k].x += delta_x;

- if ( delta_y )

- for ( k = 0; k < n; k++ )

- coords[k].y += delta_y;

- }

- /*************************************************************************/

- /* */

- /* The following functions are used by default with TrueType fonts. */

- /* However, they can be replaced by alternatives if we need to support */

- /* TrueType-compressed formats (like MicroType) in the future. */

- /* */

- /*************************************************************************/

- FT_CALLBACK_DEF( FT_Error )

- TT_Access_Glyph_Frame( TT_Loader loader,

- FT_UInt glyph_index,

- FT_ULong offset,

- FT_UInt byte_count )

- {

- FT_Error error;

- FT_Stream stream = loader->stream;

- /* for non-debug mode */

- FT_UNUSED( glyph_index );

- FT_TRACE4(( "Glyph %ld\n", glyph_index ));

- /* the following line sets the `error' variable through macros! */

- if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )

- return error;

- loader->cursor = stream->cursor;

- loader->limit = stream->limit;

- return FT_Err_Ok;

- }

- FT_CALLBACK_DEF( void )

- TT_Forget_Glyph_Frame( TT_Loader loader )

- {

- FT_Stream stream = loader->stream;

- FT_FRAME_EXIT();

- }

- FT_CALLBACK_DEF( FT_Error )

- TT_Load_Glyph_Header( TT_Loader loader )

- {

- FT_Byte* p = loader->cursor;

- FT_Byte* limit = loader->limit;

- if ( p + 10 > limit )

- return FT_THROW( Invalid_Outline );

- loader->n_contours = FT_NEXT_SHORT( p );

- loader->bbox.xMin = FT_NEXT_SHORT( p );

- loader->bbox.yMin = FT_NEXT_SHORT( p );

- loader->bbox.xMax = FT_NEXT_SHORT( p );

- loader->bbox.yMax = FT_NEXT_SHORT( p );

- FT_TRACE5(( " # of contours: %d\n", loader->n_contours ));

- FT_TRACE5(( " xMin: %4d xMax: %4d\n", loader->bbox.xMin,

- loader->bbox.xMax ));

- FT_TRACE5(( " yMin: %4d yMax: %4d\n", loader->bbox.yMin,

- loader->bbox.yMax ));

- loader->cursor = p;

- return FT_Err_Ok;

- }

- FT_CALLBACK_DEF( FT_Error )

- TT_Load_Simple_Glyph( TT_Loader load )

- {

- FT_Error error;

- FT_Byte* p = load->cursor;

- FT_Byte* limit = load->limit;

- FT_GlyphLoader gloader = load->gloader;

- FT_Int n_contours = load->n_contours;

- FT_Outline* outline;

- TT_Face face = (TT_Face)load->face;

- FT_UShort n_ins;

- FT_Int n_points;

- FT_Byte *flag, *flag_limit;

- FT_Byte c, count;

- FT_Vector *vec, *vec_limit;

- FT_Pos x;

- FT_Short *cont, *cont_limit, prev_cont;

- FT_Int xy_size = 0;

- /* check that we can add the contours to the glyph */

- error = FT_GLYPHLOADER_CHECK_POINTS( gloader, 0, n_contours );

- if ( error )

- goto Fail;

- /* reading the contours' endpoints & number of points */

- cont = gloader->current.outline.contours;

- cont_limit = cont + n_contours;

- /* check space for contours array + instructions count */

- if ( n_contours >= 0xFFF || p + ( n_contours + 1 ) * 2 > limit )

- goto Invalid_Outline;

- prev_cont = FT_NEXT_SHORT( p );

- if ( n_contours > 0 )

- cont[0] = prev_cont;

- if ( prev_cont < 0 )

- goto Invalid_Outline;

- for ( cont++; cont < cont_limit; cont++ )

- {

- cont[0] = FT_NEXT_SHORT( p );

- if ( cont[0] <= prev_cont )

- {

- /* unordered contours: this is invalid */

- goto Invalid_Outline;

- }

- prev_cont = cont[0];

- }

- n_points = 0;

- if ( n_contours > 0 )

- {

- n_points = cont[-1] + 1;

- if ( n_points < 0 )

- goto Invalid_Outline;

- }

- /* note that we will add four phantom points later */

- error = FT_GLYPHLOADER_CHECK_POINTS( gloader, n_points + 4, 0 );

- if ( error )

- goto Fail;

- /* reading the bytecode instructions */

- load->glyph->control_len = 0;

- load->glyph->control_data = 0;

- if ( p + 2 > limit )

- goto Invalid_Outline;

- n_ins = FT_NEXT_USHORT( p );

- FT_TRACE5(( " Instructions size: %u\n", n_ins ));

- if ( n_ins > face->max_profile.maxSizeOfInstructions )

- {

- FT_TRACE0(( "TT_Load_Simple_Glyph: too many instructions (%d)\n",

- n_ins ));

- error = FT_THROW( Too_Many_Hints );

- goto Fail;

- }

- if ( ( limit - p ) < n_ins )

- {

- FT_TRACE0(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));

- error = FT_THROW( Too_Many_Hints );

- goto Fail;

- }

-#ifdef TT_USE_BYTECODE_INTERPRETER

- if ( IS_HINTED( load->load_flags ) )

- {

- load->glyph->control_len = n_ins;

- load->glyph->control_data = load->exec->glyphIns;

- FT_MEM_COPY( load->exec->glyphIns, p, (FT_Long)n_ins );

- }

-#endif /* TT_USE_BYTECODE_INTERPRETER */

- p += n_ins;

- outline = &gloader->current.outline;

- if (outline->tags == NULL) {

- FT_TRACE0(( "TT_Load_Simple_Glyph: Outline->tags = NULL!\n" ));

- goto Invalid_Outline;

- }

- /* reading the point tags */

- flag = (FT_Byte*)outline->tags;

- flag_limit = flag + n_points;

- //FT_ASSERT( flag != NULL );

- while ( flag < flag_limit )

- {

- if ( p + 1 > limit )

- goto Invalid_Outline;

- *flag++ = c = FT_NEXT_BYTE( p );

- if ( c & 8 )

- {

- if ( p + 1 > limit )

- goto Invalid_Outline;

- count = FT_NEXT_BYTE( p );

- if ( flag + (FT_Int)count > flag_limit )

- goto Invalid_Outline;

- for ( ; count > 0; count-- )

- *flag++ = c;

- }

- /* reading the X coordinates */

- vec = outline->points;

- vec_limit = vec + n_points;

- flag = (FT_Byte*)outline->tags;

- x = 0;

- if ( p + xy_size > limit )

- goto Invalid_Outline;

- for ( ; vec < vec_limit; vec++, flag++ )

- {

- FT_Pos y = 0;

- FT_Byte f = *flag;

- if ( f & 2 )

- {

- if ( p + 1 > limit )

- goto Invalid_Outline;

- y = (FT_Pos)FT_NEXT_BYTE( p );

- if ( ( f & 16 ) == 0 )

- y = -y;

- }

- else if ( ( f & 16 ) == 0 )

- {

- if ( p + 2 > limit )

- goto Invalid_Outline;

- y = (FT_Pos)FT_NEXT_SHORT( p );

- }

- x += y;

- vec->x = x;

- /* the cast is for stupid compilers */

- *flag = (FT_Byte)( f & ~( 2 | 16 ) );

- }

- /* reading the Y coordinates */

- vec = gloader->current.outline.points;

- vec_limit = vec + n_points;

- flag = (FT_Byte*)outline->tags;

- x = 0;

- for ( ; vec < vec_limit; vec++, flag++ )

- {

- FT_Pos y = 0;

- FT_Byte f = *flag;

- if ( f & 4 )

- {

- if ( p + 1 > limit )

- goto Invalid_Outline;

- y = (FT_Pos)FT_NEXT_BYTE( p );

- if ( ( f & 32 ) == 0 )

- y = -y;

- }

- else if ( ( f & 32 ) == 0 )

- {

- if ( p + 2 > limit )

- goto Invalid_Outline;

- y = (FT_Pos)FT_NEXT_SHORT( p );

- }

- x += y;

- vec->y = x;

- /* the cast is for stupid compilers */

- *flag = (FT_Byte)( f & FT_CURVE_TAG_ON );

- }

- outline->n_points = (FT_UShort)n_points;

- outline->n_contours = (FT_Short) n_contours;

- load->cursor = p;

- Fail:

- return error;

- Invalid_Outline:

- error = FT_THROW( Invalid_Outline );

- goto Fail;

- }

- FT_CALLBACK_DEF( FT_Error )

- TT_Load_Composite_Glyph( TT_Loader loader )

- {

- FT_Error error;

- FT_Byte* p = loader->cursor;

- FT_Byte* limit = loader->limit;

- FT_GlyphLoader gloader = loader->gloader;

- FT_SubGlyph subglyph;

- FT_UInt num_subglyphs;

- num_subglyphs = 0;

- do

- {

- FT_Fixed xx, xy, yy, yx;

- FT_UInt count;

- /* check that we can load a new subglyph */

- error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs + 1 );

- if ( error )

- goto Fail;

- /* check space */

- if ( p + 4 > limit )

- goto Invalid_Composite;

- subglyph = gloader->current.subglyphs + num_subglyphs;

- subglyph->arg1 = subglyph->arg2 = 0;

- subglyph->flags = FT_NEXT_USHORT( p );

- subglyph->index = FT_NEXT_USHORT( p );

- /* check space */

- count = 2;

- if ( subglyph->flags & ARGS_ARE_WORDS )

- count += 2;

- if ( subglyph->flags & WE_HAVE_A_SCALE )

- count += 2;

- else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )

- count += 4;

- else if ( subglyph->flags & WE_HAVE_A_2X2 )

- count += 8;

- if ( p + count > limit )

- goto Invalid_Composite;

- /* read arguments */

- if ( subglyph->flags & ARGS_ARE_WORDS )

- {

- subglyph->arg1 = FT_NEXT_SHORT( p );

- subglyph->arg2 = FT_NEXT_SHORT( p );

- }

- else

- {

- subglyph->arg1 = FT_NEXT_CHAR( p );

- subglyph->arg2 = FT_NEXT_CHAR( p );

- }

- /* read transform */

- xx = yy = 0x10000L;

- xy = yx = 0;

- if ( subglyph->flags & WE_HAVE_A_SCALE )

- {

- xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- yy = xx;

- }

- else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )

- {

- xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- }

- else if ( subglyph->flags & WE_HAVE_A_2X2 )

- {

- xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- yx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- xy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;

- }

- subglyph->transform.xx = xx;

- subglyph->transform.xy = xy;

- subglyph->transform.yx = yx;

- subglyph->transform.yy = yy;

- num_subglyphs++;

- } while ( subglyph->flags & MORE_COMPONENTS );

- gloader->current.num_subglyphs = num_subglyphs;

-#ifdef TT_USE_BYTECODE_INTERPRETER

- {

- FT_Stream stream = loader->stream;

- /* we must undo the FT_FRAME_ENTER in order to point */

- /* to the composite instructions, if we find some. */

- /* We will process them later. */

- /* */

- loader->ins_pos = (FT_ULong)( FT_STREAM_POS() +

- p - limit );

- }

-#endif

- loader->cursor = p;

- Fail:

- return error;

- Invalid_Composite:

- error = FT_THROW( Invalid_Composite );

- goto Fail;

- }

- FT_LOCAL_DEF( void )

- TT_Init_Glyph_Loading( TT_Face face )

- {

- face->access_glyph_frame = TT_Access_Glyph_Frame;

- face->read_glyph_header = TT_Load_Glyph_Header;

- face->read_simple_glyph = TT_Load_Simple_Glyph;

- face->read_composite_glyph = TT_Load_Composite_Glyph;

- face->forget_glyph_frame = TT_Forget_Glyph_Frame;

- }

- static void

- tt_prepare_zone( TT_GlyphZone zone,

- FT_GlyphLoad load,

- FT_UInt start_point,

- FT_UInt start_contour )

- {

- zone->n_points = (FT_UShort)( load->outline.n_points - start_point );

- zone->n_contours = (FT_Short) ( load->outline.n_contours -

- start_contour );

- zone->org = load->extra_points + start_point;

- zone->cur = load->outline.points + start_point;

- zone->orus = load->extra_points2 + start_point;

- zone->tags = (FT_Byte*)load->outline.tags + start_point;

- zone->contours = (FT_UShort*)load->outline.contours + start_contour;

- zone->first_point = (FT_UShort)start_point;

- }

- /*************************************************************************/

- /* */

- /* <Function> */

- /* TT_Hint_Glyph */

- /* */

- /* <Description> */

- /* Hint the glyph using the zone prepared by the caller. Note that */

- /* the zone is supposed to include four phantom points. */

- /* */

- static FT_Error

- 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;

-#ifdef TT_USE_BYTECODE_INTERPRETER

- FT_UInt n_ins;

-#else

- FT_UNUSED( is_composite );

-#endif

-#ifdef TT_USE_BYTECODE_INTERPRETER

- if ( loader->glyph->control_len > 0xFFFFL )

- {

- FT_TRACE1(( "TT_Hint_Glyph: too long instructions " ));

- FT_TRACE1(( "(0x%lx byte) is truncated\n",

- loader->glyph->control_len ));

- }

- n_ins = (FT_UInt)( loader->glyph->control_len );

-#endif

- origin = zone->cur[zone->n_points - 4].x;

- origin = FT_PIX_ROUND( origin ) - origin;

- if ( origin )

- translate_array( zone->n_points, zone->cur, origin, 0 );

-#ifdef TT_USE_BYTECODE_INTERPRETER

- /* save original point position in org */

- if ( n_ins > 0 )

- FT_ARRAY_COPY( zone->org, zone->cur, zone->n_points );

- /* Reset graphics state. */

- loader->exec->GS = ((TT_Size)loader->size)->GS;

- /* XXX: UNDOCUMENTED! Hinting instructions of a composite glyph */

- /* completely refer to the (already) hinted subglyphs. */

- if ( is_composite )

- {

- loader->exec->metrics.x_scale = 1 << 16;

- loader->exec->metrics.y_scale = 1 << 16;

- FT_ARRAY_COPY( zone->orus, zone->cur, zone->n_points );

- }

- else

- {

- loader->exec->metrics.x_scale =

- ((TT_Size)loader->size)->metrics.x_scale;

- loader->exec->metrics.y_scale =

- ((TT_Size)loader->size)->metrics.y_scale;

- }

-#endif

- /* round pp2 and pp4 */

- zone->cur[zone->n_points - 3].x =

- FT_PIX_ROUND( zone->cur[zone->n_points - 3].x );

- zone->cur[zone->n_points - 1].y =

- FT_PIX_ROUND( zone->cur[zone->n_points - 1].y );

-#ifdef TT_USE_BYTECODE_INTERPRETER

- if ( n_ins > 0 )

- {

- FT_Bool debug;

- FT_Error error;

- FT_GlyphLoader gloader = loader->gloader;

- FT_Outline current_outline = gloader->current.outline;

- error = TT_Set_CodeRange( loader->exec, tt_coderange_glyph,

- loader->exec->glyphIns, n_ins );

- if ( error )

- return error;

- loader->exec->is_composite = is_composite;

- loader->exec->pts = *zone;

- debug = FT_BOOL( !( loader->load_flags & FT_LOAD_NO_SCALE ) &&

- ((TT_Size)loader->size)->debug );

- error = TT_Run_Context( loader->exec, debug );

- if ( error && loader->exec->pedantic_hinting )

- return error;

- /* store drop-out mode in bits 5-7; set bit 2 also as a marker */

- current_outline.tags[0] |=

- ( loader->exec->GS.scan_type << 5 ) | FT_CURVE_TAG_HAS_SCANMODE;

- }

-#endif

- /* save glyph phantom points */

- if ( !loader->preserve_pps )

- {

- loader->pp1 = zone->cur[zone->n_points - 4];

- loader->pp2 = zone->cur[zone->n_points - 3];

- loader->pp3 = zone->cur[zone->n_points - 2];

- loader->pp4 = zone->cur[zone->n_points - 1];

- }

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- 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 */

- return FT_Err_Ok;

- }

- /*************************************************************************/

- /* */

- /* <Function> */

- /* TT_Process_Simple_Glyph */

- /* */

- /* <Description> */

- /* Once a simple glyph has been loaded, it needs to be processed. */

- /* Usually, this means scaling and hinting through bytecode */

- /* interpretation. */

- /* */

- static FT_Error

- TT_Process_Simple_Glyph( TT_Loader loader )

- {

- FT_GlyphLoader gloader = loader->gloader;

- FT_Error error = FT_Err_Ok;

- FT_Outline* outline;

- FT_Int n_points;

- outline = &gloader->current.outline;

- n_points = outline->n_points;

- /* set phantom points */

- outline->points[n_points ] = loader->pp1;

- outline->points[n_points + 1] = loader->pp2;

- outline->points[n_points + 2] = loader->pp3;

- outline->points[n_points + 3] = loader->pp4;

- outline->tags[n_points ] = 0;

- outline->tags[n_points + 1] = 0;

- outline->tags[n_points + 2] = 0;

- outline->tags[n_points + 3] = 0;

- n_points += 4;

-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

- if ( ((TT_Face)loader->face)->doblend )

- {

- /* Deltas apply to the unscaled data. */

- FT_Vector* deltas;

- FT_Memory memory = loader->face->memory;

- FT_Int i;

- error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),

- loader->glyph_index,

- &deltas,

- n_points );

- if ( error )

- return error;

- for ( i = 0; i < n_points; ++i )

- {

- outline->points[i].x += deltas[i].x;

- outline->points[i].y += deltas[i].y;

- }

- FT_FREE( deltas );

- }

-#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */

- if ( IS_HINTED( loader->load_flags ) )

- {

- tt_prepare_zone( &loader->zone, &gloader->current, 0, 0 );

- FT_ARRAY_COPY( loader->zone.orus, loader->zone.cur,

- loader->zone.n_points + 4 );

- }

- {

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- 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 = 0; /* pacify compiler */

- FT_Fixed y_scale = 0;

- FT_Bool do_scale = FALSE;

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )

- {

- /* 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;

- }

- 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];

- }

- /**We Disable HINT except tricky font, seem it looks better, #Testdoc:0000584_Open_CAC5U7WH.pdf,

- 0000879_Image_MSFNUnattendedPDF.pdf,0005480_sample-barcodes print.pdf.

- */

- if ( IS_HINTED( loader->load_flags ) && (loader->face->face_flags&FT_FACE_FLAG_TRICKY))

- {

- loader->zone.n_points += 4;

- error = TT_Hint_Glyph( loader, 0 );

- }

- return error;

- }

- /*************************************************************************/

- /* */

- /* <Function> */

- /* TT_Process_Composite_Component */

- /* */

- /* <Description> */

- /* Once a composite component has been loaded, it needs to be */

- /* processed. Usually, this means transforming and translating. */

- /* */

- static FT_Error

- TT_Process_Composite_Component( TT_Loader loader,

- FT_SubGlyph subglyph,

- FT_UInt start_point,

- FT_UInt num_base_points )

- {

- FT_GlyphLoader gloader = loader->gloader;

- FT_Vector* base_vec = gloader->base.outline.points;

- FT_UInt num_points = gloader->base.outline.n_points;

- FT_Bool have_scale;

- FT_Pos x, y;

- have_scale = FT_BOOL( subglyph->flags & ( WE_HAVE_A_SCALE |

- WE_HAVE_AN_XY_SCALE |

- WE_HAVE_A_2X2 ) );

- /* perform the transform required for this subglyph */

- if ( have_scale )

- {

- FT_UInt i;

- for ( i = num_base_points; i < num_points; i++ )

- FT_Vector_Transform( base_vec + i, &subglyph->transform );

- }

- /* get offset */

- if ( !( subglyph->flags & ARGS_ARE_XY_VALUES ) )

- {

- FT_UInt k = subglyph->arg1;

- FT_UInt l = subglyph->arg2;

- FT_Vector* p1;

- FT_Vector* p2;

- /* match l-th point of the newly loaded component to the k-th point */

- /* of the previously loaded components. */

- /* change to the point numbers used by our outline */

- k += start_point;

- l += num_base_points;

- if ( k >= num_base_points ||

- l >= num_points )

- return FT_THROW( Invalid_Composite );

- p1 = gloader->base.outline.points + k;

- p2 = gloader->base.outline.points + l;

- x = p1->x - p2->x;

- y = p1->y - p2->y;

- }

- else

- {

- x = subglyph->arg1;

- y = subglyph->arg2;

- if ( !x && !y )

- return FT_Err_Ok;

- /* Use a default value dependent on */

- /* TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED. This is useful for old TT */

- /* fonts which don't set the xxx_COMPONENT_OFFSET bit. */

- if ( have_scale &&

-#ifdef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED

- !( subglyph->flags & UNSCALED_COMPONENT_OFFSET ) )

-#else

- ( subglyph->flags & SCALED_COMPONENT_OFFSET ) )

-#endif

- {

-#if 0

- /*************************************************************************/

- /* */

- /* This algorithm is what Apple documents. But it doesn't work. */

- /* */

- int a = subglyph->transform.xx > 0 ? subglyph->transform.xx

- : -subglyph->transform.xx;

- int b = subglyph->transform.yx > 0 ? subglyph->transform.yx

- : -subglyph->transform.yx;

- int c = subglyph->transform.xy > 0 ? subglyph->transform.xy

- : -subglyph->transform.xy;

- int d = subglyph->transform.yy > 0 ? subglyph->transform.yy

- : -subglyph->transform.yy;

- int m = a > b ? a : b;

- int n = c > d ? c : d;

- if ( a - b <= 33 && a - b >= -33 )

- m *= 2;

- if ( c - d <= 33 && c - d >= -33 )

- n *= 2;

- x = FT_MulFix( x, m );

- y = FT_MulFix( y, n );

-#else /* 0 */

- /*************************************************************************/

- /* */

- /* This algorithm is a guess and works much better than the above. */

- /* */

- FT_Fixed mac_xscale = FT_Hypot( subglyph->transform.xx,

- subglyph->transform.xy );

- FT_Fixed mac_yscale = FT_Hypot( subglyph->transform.yy,

- subglyph->transform.yx );

- x = FT_MulFix( x, mac_xscale );

- y = FT_MulFix( y, mac_yscale );

-#endif /* 0 */

- }

- if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )

- {

- FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;

- FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;

- x = FT_MulFix( x, x_scale );

- y = FT_MulFix( y, y_scale );

- if ( subglyph->flags & ROUND_XY_TO_GRID )

- {

- x = FT_PIX_ROUND( x );

- y = FT_PIX_ROUND( y );

- }

- if ( x || y )

- translate_array( num_points - num_base_points,

- base_vec + num_base_points,

- x, y );

- return FT_Err_Ok;

- }

- /*************************************************************************/

- /* */

- /* <Function> */

- /* TT_Process_Composite_Glyph */

- /* */

- /* <Description> */

- /* This is slightly different from TT_Process_Simple_Glyph, in that */

- /* its sole purpose is to hint the glyph. Thus this function is */

- /* only available when bytecode interpreter is enabled. */

- /* */

- static FT_Error

- TT_Process_Composite_Glyph( TT_Loader loader,

- FT_UInt start_point,

- FT_UInt start_contour )

- {

- FT_Error error;

- FT_Outline* outline;

- FT_UInt i;

- outline = &loader->gloader->base.outline;

- /* make room for phantom points */

- error = FT_GLYPHLOADER_CHECK_POINTS( loader->gloader,

- outline->n_points + 4,

- 0 );

- if ( error )

- return error;

- outline->points[outline->n_points ] = loader->pp1;

- outline->points[outline->n_points + 1] = loader->pp2;

- outline->points[outline->n_points + 2] = loader->pp3;

- outline->points[outline->n_points + 3] = loader->pp4;

- outline->tags[outline->n_points ] = 0;

- outline->tags[outline->n_points + 1] = 0;

- outline->tags[outline->n_points + 2] = 0;

- outline->tags[outline->n_points + 3] = 0;

-#ifdef TT_USE_BYTECODE_INTERPRETER

- {

- FT_Stream stream = loader->stream;

- FT_UShort n_ins, max_ins;

- FT_ULong tmp;

- /* TT_Load_Composite_Glyph only gives us the offset of instructions */

- /* so we read them here */

- if ( FT_STREAM_SEEK( loader->ins_pos ) ||

- FT_READ_USHORT( n_ins ) )

- return error;

- FT_TRACE5(( " Instructions size = %d\n", n_ins ));

- /* check it */

- max_ins = ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions;

- if ( n_ins > max_ins )

- {

- /* acroread ignores this field, so we only do a rough safety check */

- if ( (FT_Int)n_ins > loader->byte_len )

- {

- FT_TRACE1(( "TT_Process_Composite_Glyph: "

- "too many instructions (%d) for glyph with length %d\n",

- n_ins, loader->byte_len ));

- return FT_THROW( Too_Many_Hints );

- }

- tmp = loader->exec->glyphSize;

- error = Update_Max( loader->exec->memory,

- &tmp,

- sizeof ( FT_Byte ),

- (void*)&loader->exec->glyphIns,

- n_ins );

- loader->exec->glyphSize = (FT_UShort)tmp;

- if ( error )

- return error;

- }

- else if ( n_ins == 0 )

- return FT_Err_Ok;

- if ( FT_STREAM_READ( loader->exec->glyphIns, n_ins ) )

- return error;

- loader->glyph->control_data = loader->exec->glyphIns;

- loader->glyph->control_len = n_ins;

- }

-#endif

- tt_prepare_zone( &loader->zone, &loader->gloader->base,

- start_point, start_contour );

- /* Some points are likely touched during execution of */

- /* instructions on components. So let's untouch them. */

- for ( i = start_point; i < loader->zone.n_points; i++ )

- loader->zone.tags[i] &= ~FT_CURVE_TAG_TOUCH_BOTH;

- loader->zone.n_points += 4;

- return TT_Hint_Glyph( loader, 1 );

- }

- /* Calculate the four phantom points. */

- /* The first two stand for horizontal origin and advance. */

- /* The last two stand for vertical origin and advance. */

-#define TT_LOADER_SET_PP( loader ) \

- do { \

- (loader)->pp1.x = (loader)->bbox.xMin - (loader)->left_bearing; \

- (loader)->pp1.y = 0; \

- (loader)->pp2.x = (loader)->pp1.x + (loader)->advance; \

- (loader)->pp2.y = 0; \

- (loader)->pp3.x = 0; \

- (loader)->pp3.y = (loader)->top_bearing + (loader)->bbox.yMax; \

- (loader)->pp4.x = 0; \

- (loader)->pp4.y = (loader)->pp3.y - (loader)->vadvance; \

- } while ( 0 )

- /*************************************************************************/

- /* */

- /* <Function> */

- /* load_truetype_glyph */

- /* */

- /* <Description> */

- /* Loads a given truetype glyph. Handles composites and uses a */

- /* TT_Loader object. */

- /* */

- static FT_Error

- load_truetype_glyph( TT_Loader loader,

- FT_UInt glyph_index,

- FT_UInt recurse_count,

- FT_Bool header_only )

- {

- FT_Error error = FT_Err_Ok;

- FT_Fixed x_scale, y_scale;

- FT_ULong offset;

- TT_Face face = (TT_Face)loader->face;

- FT_GlyphLoader gloader = loader->gloader;

- FT_Bool opened_frame = 0;

-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

- FT_Vector* deltas = NULL;

-#endif

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- FT_StreamRec inc_stream;

- FT_Data glyph_data;

- FT_Bool glyph_data_loaded = 0;

-#endif

- /* some fonts have an incorrect value of `maxComponentDepth', */

- /* thus we allow depth 1 to catch the majority of them */

- if ( recurse_count > 1 &&

- recurse_count > face->max_profile.maxComponentDepth )

- {

- error = FT_THROW( Invalid_Composite );

- goto Exit;

- }

- /* check glyph index */

- if ( glyph_index >= (FT_UInt)face->root.num_glyphs )

- {

- error = FT_THROW( Invalid_Glyph_Index );

- goto Exit;

- }

- loader->glyph_index = glyph_index;

- 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;

- }

- else

- {

- x_scale = 0x10000L;

- y_scale = 0x10000L;

- }

- tt_get_metrics( loader, glyph_index );

- /* Set `offset' to the start of the glyph relative to the start of */

- /* the `glyf' table, and `byte_len' to the length of the glyph in */

- /* bytes. */

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- /* If we are loading glyph data via the incremental interface, set */

- /* the loader stream to a memory stream reading the data returned */

- /* by the interface. */

- if ( face->root.internal->incremental_interface )

- {

- error = face->root.internal->incremental_interface->funcs->get_glyph_data(

- face->root.internal->incremental_interface->object,

- glyph_index, &glyph_data );

- if ( error )

- goto Exit;

- glyph_data_loaded = 1;

- offset = 0;

- loader->byte_len = glyph_data.length;

- FT_MEM_ZERO( &inc_stream, sizeof ( inc_stream ) );

- FT_Stream_OpenMemory( &inc_stream,

- glyph_data.pointer, glyph_data.length );

- loader->stream = &inc_stream;

- }

- else

-#endif /* FT_CONFIG_OPTION_INCREMENTAL */

- offset = tt_face_get_location( face, glyph_index,

- (FT_UInt*)&loader->byte_len );

- if ( loader->byte_len > 0 )

- {

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- /* for the incremental interface, `glyf_offset' is always zero */

- if ( !loader->glyf_offset &&

- !face->root.internal->incremental_interface )

-#else

- if ( !loader->glyf_offset )

-#endif /* FT_CONFIG_OPTION_INCREMENTAL */

- {

- FT_TRACE2(( "no `glyf' table but non-zero `loca' entry\n" ));

- error = FT_THROW( Invalid_Table );

- goto Exit;

- }

- error = face->access_glyph_frame( loader, glyph_index,

- loader->glyf_offset + offset,

- loader->byte_len );

- if ( error )

- goto Exit;

- opened_frame = 1;

- /* read glyph header first */

- error = face->read_glyph_header( loader );

- if ( error || header_only )

- goto Exit;

- }

- if ( loader->byte_len == 0 || loader->n_contours == 0 )

- {

- loader->bbox.xMin = 0;

- loader->bbox.xMax = 0;

- loader->bbox.yMin = 0;

- loader->bbox.yMax = 0;

- if ( header_only )

- goto Exit;

- /* must initialize points before (possibly) overriding */

- /* glyph metrics from the incremental interface */

- TT_LOADER_SET_PP( loader );

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- tt_get_metrics_incr_overrides( loader, glyph_index );

-#endif

-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

- if ( ((TT_Face)(loader->face))->doblend )

- {

- /* this must be done before scaling */

- FT_Memory memory = loader->face->memory;

- error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),

- glyph_index, &deltas, 4 );

- if ( error )

- goto Exit;

- loader->pp1.x += deltas[0].x; loader->pp1.y += deltas[0].y;

- loader->pp2.x += deltas[1].x; loader->pp2.y += deltas[1].y;

- loader->pp3.x += deltas[2].x; loader->pp3.y += deltas[2].y;

- loader->pp4.x += deltas[3].x; loader->pp4.y += deltas[3].y;

- FT_FREE( deltas );

- }

-#endif

- if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )

- {

- loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );

- loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );

- loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );

- loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );

- }

- error = FT_Err_Ok;

- goto Exit;

- }

- /* must initialize points before (possibly) overriding */

- /* glyph metrics from the incremental interface */

- TT_LOADER_SET_PP( loader );

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- tt_get_metrics_incr_overrides( loader, glyph_index );

-#endif

- /***********************************************************************/

- /* if it is a simple glyph, load it */

- if ( loader->n_contours > 0 )

- {

- error = face->read_simple_glyph( loader );

- if ( error )

- goto Exit;

- /* all data have been read */

- face->forget_glyph_frame( loader );

- opened_frame = 0;

- error = TT_Process_Simple_Glyph( loader );

- if ( error )

- goto Exit;

- FT_GlyphLoader_Add( gloader );

- }

- /***********************************************************************/

- /* otherwise, load a composite! */

- else if ( loader->n_contours == -1 )

- {

- FT_UInt start_point;

- FT_UInt start_contour;

- FT_ULong ins_pos; /* position of composite instructions, if any */

- start_point = gloader->base.outline.n_points;

- start_contour = gloader->base.outline.n_contours;

- /* for each subglyph, read composite header */

- error = face->read_composite_glyph( loader );

- if ( error )

- goto Exit;

- /* store the offset of instructions */

- ins_pos = loader->ins_pos;

- /* all data we need are read */

- face->forget_glyph_frame( loader );

- opened_frame = 0;

-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

- if ( face->doblend )

- {

- FT_Int i, limit;

- FT_SubGlyph subglyph;

- FT_Memory memory = face->root.memory;

- /* this provides additional offsets */

- /* for each component's translation */

- if ( ( error = TT_Vary_Get_Glyph_Deltas(

- face,

- glyph_index,

- &deltas,

- gloader->current.num_subglyphs + 4 )) != 0 )

- goto Exit;

- subglyph = gloader->current.subglyphs + gloader->base.num_subglyphs;

- limit = gloader->current.num_subglyphs;

- for ( i = 0; i < limit; ++i, ++subglyph )

- {

- if ( subglyph->flags & ARGS_ARE_XY_VALUES )

- {

- /* XXX: overflow check for subglyph->{arg1,arg2}. */

- /* deltas[i].{x,y} must be within signed 16-bit, */

- /* but the restriction of summed delta is not clear */

- subglyph->arg1 += (FT_Int16)deltas[i].x;

- subglyph->arg2 += (FT_Int16)deltas[i].y;

- }

- loader->pp1.x += deltas[i + 0].x; loader->pp1.y += deltas[i + 0].y;

- loader->pp2.x += deltas[i + 1].x; loader->pp2.y += deltas[i + 1].y;

- loader->pp3.x += deltas[i + 2].x; loader->pp3.y += deltas[i + 2].y;

- loader->pp4.x += deltas[i + 3].x; loader->pp4.y += deltas[i + 3].y;

- FT_FREE( deltas );

- }

-#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */

- if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )

- {

- loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );

- loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );

- loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );

- loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );

- }

- /* if the flag FT_LOAD_NO_RECURSE is set, we return the subglyph */

- /* `as is' in the glyph slot (the client application will be */

- /* responsible for interpreting these data)... */

- if ( loader->load_flags & FT_LOAD_NO_RECURSE )

- {

- FT_GlyphLoader_Add( gloader );

- loader->glyph->format = FT_GLYPH_FORMAT_COMPOSITE;

- goto Exit;

- }

- /*********************************************************************/

- {

- FT_UInt n, num_base_points;

- FT_SubGlyph subglyph = 0;

- FT_UInt num_points = start_point;

- FT_UInt num_subglyphs = gloader->current.num_subglyphs;

- FT_UInt num_base_subgs = gloader->base.num_subglyphs;

- FT_Stream old_stream = loader->stream;

- FT_Int old_byte_len = loader->byte_len;

- FT_GlyphLoader_Add( gloader );

- /* read each subglyph independently */

- for ( n = 0; n < num_subglyphs; n++ )

- {

- FT_Vector pp[4];

- /* Each time we call load_truetype_glyph in this loop, the */

- /* value of `gloader.base.subglyphs' can change due to table */

- /* reallocations. We thus need to recompute the subglyph */

- /* pointer on each iteration. */

- subglyph = gloader->base.subglyphs + num_base_subgs + n;

- pp[0] = loader->pp1;

- pp[1] = loader->pp2;

- pp[2] = loader->pp3;

- pp[3] = loader->pp4;

- num_base_points = gloader->base.outline.n_points;

- error = load_truetype_glyph( loader, subglyph->index,

- recurse_count + 1, FALSE );

- if ( error )

- goto Exit;

- /* restore subglyph pointer */

- subglyph = gloader->base.subglyphs + num_base_subgs + n;

- if ( !( subglyph->flags & USE_MY_METRICS ) )

- {

- loader->pp1 = pp[0];

- loader->pp2 = pp[1];

- loader->pp3 = pp[2];

- loader->pp4 = pp[3];

- }

- num_points = gloader->base.outline.n_points;

- if ( num_points == num_base_points )

- continue;

- /* gloader->base.outline consists of three parts: */

- /* 0 -(1)-> start_point -(2)-> num_base_points -(3)-> n_points. */

- /* */

- /* (1): exists from the beginning */

- /* (2): components that have been loaded so far */

- /* (3): the newly loaded component */

- TT_Process_Composite_Component( loader, subglyph, start_point,

- num_base_points );

- }

- loader->stream = old_stream;

- loader->byte_len = old_byte_len;

- /* process the glyph */

- loader->ins_pos = ins_pos;

- if ( IS_HINTED( loader->load_flags ) &&

-#ifdef TT_USE_BYTECODE_INTERPRETER

- subglyph->flags & WE_HAVE_INSTR &&

-#endif

- num_points > start_point )

- TT_Process_Composite_Glyph( loader, start_point, start_contour );

- }

- else

- {

- /* invalid composite count (negative but not -1) */

- error = FT_THROW( Invalid_Outline );

- goto Exit;

- }

- /***********************************************************************/

- Exit:

- if ( opened_frame )

- face->forget_glyph_frame( loader );

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- if ( glyph_data_loaded )

- face->root.internal->incremental_interface->funcs->free_glyph_data(

- face->root.internal->incremental_interface->object,

- &glyph_data );

-#endif

- return error;

- }

- static FT_Error

- 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;

- FT_Fixed y_scale;

- TT_GlyphSlot glyph = loader->glyph;

- TT_Size size = (TT_Size)loader->size;

- y_scale = 0x10000L;

- if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )

- y_scale = size->root.metrics.y_scale;

- if ( glyph->format != FT_GLYPH_FORMAT_COMPOSITE )

- FT_Outline_Get_CBox( &glyph->outline, &bbox );

- else

- bbox = loader->bbox;

- /* get the device-independent horizontal advance; it is scaled later */

- /* by the base layer. */

- glyph->linearHoriAdvance = loader->linear;

- glyph->metrics.horiBearingX = bbox.xMin;

- glyph->metrics.horiBearingY = bbox.yMax;

- glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;

- /* adjust advance width to the value contained in the hdmx table */

- if ( !face->postscript.isFixedPitch &&

- IS_HINTED( loader->load_flags ) )

- {

- FT_Byte* widthp;

- widthp = tt_face_get_device_metrics( face,

- size->root.metrics.x_ppem,

- glyph_index );

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- 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 */

- {

- if ( widthp )

- glyph->metrics.horiAdvance = *widthp << 6;

- }

- /* set glyph dimensions */

- glyph->metrics.width = bbox.xMax - bbox.xMin;

- glyph->metrics.height = bbox.yMax - bbox.yMin;

- /* Now take care of vertical metrics. In the case where there is */

- /* no vertical information within the font (relatively common), */

- /* create some metrics manually */

- {

- FT_Pos top; /* scaled vertical top side bearing */

- FT_Pos advance; /* scaled vertical advance height */

- /* Get the unscaled top bearing and advance height. */

- if ( face->vertical_info &&

- face->vertical.number_Of_VMetrics > 0 )

- {

- top = (FT_Short)FT_DivFix( loader->pp3.y - bbox.yMax,

- y_scale );

- if ( loader->pp3.y <= loader->pp4.y )

- advance = 0;

- else

- advance = (FT_UShort)FT_DivFix( loader->pp3.y - loader->pp4.y,

- y_scale );

- }

- else

- {

- FT_Pos height;

- /* XXX Compute top side bearing and advance height in */

- /* Get_VMetrics instead of here. */

- /* NOTE: The OS/2 values are the only `portable' ones, */

- /* which is why we use them, if there is an OS/2 */

- /* table in the font. Otherwise, we use the */

- /* values defined in the horizontal header. */

- height = (FT_Short)FT_DivFix( bbox.yMax - bbox.yMin,

- y_scale );

- if ( face->os2.version != 0xFFFFU )

- advance = (FT_Pos)( face->os2.sTypoAscender -

- face->os2.sTypoDescender );

- else

- advance = (FT_Pos)( face->horizontal.Ascender -

- face->horizontal.Descender );

- top = ( advance - height ) / 2;

- }

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- {

- FT_Incremental_InterfaceRec* incr;

- FT_Incremental_MetricsRec metrics;

- FT_Error error;

- incr = face->root.internal->incremental_interface;

- /* If this is an incrementally loaded font see if there are */

- /* overriding metrics for this glyph. */

- if ( incr && incr->funcs->get_glyph_metrics )

- {

- metrics.bearing_x = 0;

- metrics.bearing_y = top;

- metrics.advance = advance;

- error = incr->funcs->get_glyph_metrics( incr->object,

- glyph_index,

- TRUE,

- &metrics );

- if ( error )

- return error;

- top = metrics.bearing_y;

- advance = metrics.advance;

- }

- /* GWW: Do vertical metrics get loaded incrementally too? */

-#endif /* FT_CONFIG_OPTION_INCREMENTAL */

- glyph->linearVertAdvance = advance;

- /* scale the metrics */

- if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )

- {

- top = FT_MulFix( top, y_scale );

- advance = FT_MulFix( advance, y_scale );

- }

- /* XXX: for now, we have no better algorithm for the lsb, but it */

- /* should work fine. */

- /* */

- glyph->metrics.vertBearingX = glyph->metrics.horiBearingX -

- glyph->metrics.horiAdvance / 2;

- glyph->metrics.vertBearingY = top;

- glyph->metrics.vertAdvance = advance;

- }

- return 0;

- }

-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS

- static FT_Error

- load_sbit_image( TT_Size size,

- TT_GlyphSlot glyph,

- FT_UInt glyph_index,

- FT_Int32 load_flags )

- {

- TT_Face face;

- SFNT_Service sfnt;

- FT_Stream stream;

- FT_Error error;

- TT_SBit_MetricsRec metrics;

- face = (TT_Face)glyph->face;

- sfnt = (SFNT_Service)face->sfnt;

- stream = face->root.stream;

- error = sfnt->load_sbit_image( face,

- size->strike_index,

- glyph_index,

- (FT_Int)load_flags,

- stream,

- &glyph->bitmap,

- &metrics );

- if ( !error )

- {

- glyph->outline.n_points = 0;

- glyph->outline.n_contours = 0;

- glyph->metrics.width = (FT_Pos)metrics.width << 6;

- glyph->metrics.height = (FT_Pos)metrics.height << 6;

- glyph->metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6;

- glyph->metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6;

- glyph->metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6;

- glyph->metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6;

- glyph->metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6;

- glyph->metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6;

- glyph->format = FT_GLYPH_FORMAT_BITMAP;

- if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )

- {

- glyph->bitmap_left = metrics.vertBearingX;

- glyph->bitmap_top = metrics.vertBearingY;

- }

- else

- {

- glyph->bitmap_left = metrics.horiBearingX;

- glyph->bitmap_top = metrics.horiBearingY;

- }

- return error;

- }

-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */

- static FT_Error

- tt_loader_init( TT_Loader loader,

- TT_Size size,

- TT_GlyphSlot glyph,

- FT_Int32 load_flags,

- FT_Bool glyf_table_only )

- {

- TT_Face face;

- FT_Stream stream;

-#ifdef TT_USE_BYTECODE_INTERPRETER

- FT_Bool pedantic = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );

-#endif

- face = (TT_Face)glyph->face;

- stream = face->root.stream;

- FT_MEM_ZERO( loader, sizeof ( TT_LoaderRec ) );

-#ifdef TT_USE_BYTECODE_INTERPRETER

- /* load execution context */

- if ( IS_HINTED( load_flags ) && !glyf_table_only )

- {

- TT_ExecContext exec;

- FT_Bool grayscale;

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- TT_Driver driver = (TT_Driver)FT_FACE_DRIVER( face );

- FT_Bool subpixel_hinting = FALSE;

- FT_Bool grayscale_hinting = TRUE;

-#if 0

- /* 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 )

- {

- FT_Error error = tt_size_ready_bytecode( size, pedantic );

- if ( error )

- return error;

- }

- /* query new execution context */

- exec = size->debug ? size->context

- : ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;

- if ( !exec )

- return FT_THROW( Could_Not_Find_Context );

-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING

- if ( driver->interpreter_version == TT_INTERPRETER_VERSION_38 )

- {

- 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 )

- {

- grayscale = grayscale_hinting = TRUE;

- subpixel_hinting = FALSE;

- }

- else

- grayscale = grayscale_hinting = FALSE;

- 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;

-#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 );

-#endif /* 0 */

- }

- else

-#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

- 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;

- 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 );

- }

- /* see whether the cvt program has disabled hinting */

- if ( exec->GS.instruct_control & 1 )

- load_flags |= FT_LOAD_NO_HINTING;

- /* load default graphics state -- if needed */

- if ( exec->GS.instruct_control & 2 )

- exec->GS = tt_default_graphics_state;

- exec->pedantic_hinting = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );

- loader->exec = exec;

- loader->instructions = exec->glyphIns;

- }

-#endif /* TT_USE_BYTECODE_INTERPRETER */

- /* seek to the beginning of the glyph table -- for Type 42 fonts */

- /* the table might be accessed from a Postscript stream or something */

- /* else... */

-#ifdef FT_CONFIG_OPTION_INCREMENTAL

- if ( face->root.internal->incremental_interface )

- loader->glyf_offset = 0;

- else

-#endif

- {

- FT_Error error = face->goto_table( face, TTAG_glyf, stream, 0 );

- if ( FT_ERR_EQ( error, Table_Missing ) )

- loader->glyf_offset = 0;

- else if ( error )

- {

- FT_ERROR(( "tt_loader_init: could not access glyph table\n" ));

- return error;

- }

- else

- loader->glyf_offset = FT_STREAM_POS();

- }

- /* get face's glyph loader */

- if ( !glyf_table_only )

- {

- FT_GlyphLoader gloader = glyph->internal->loader;

- FT_GlyphLoader_Rewind( gloader );

- loader->gloader = gloader;

- }

- loader->load_flags = load_flags;

- loader->face = (FT_Face)face;

- loader->size = (FT_Size)size;

- loader->glyph = (FT_GlyphSlot)glyph;

- loader->stream = stream;

- return FT_Err_Ok;

- }

- /*************************************************************************/

- /* */

- /* <Function> */

- /* TT_Load_Glyph */

- /* */

- /* <Description> */

- /* A function used to load a single glyph within a given glyph slot, */

- /* for a given size. */

- /* */

- /* <Input> */

- /* glyph :: A handle to a target slot object where the glyph */

- /* will be loaded. */

- /* */

- /* size :: A handle to the source face size at which the glyph */

- /* must be scaled/loaded. */

- /* */

- /* glyph_index :: The index of the glyph in the font file. */

- /* */

- /* load_flags :: A flag indicating what to load for this glyph. The */

- /* FT_LOAD_XXX constants can be used to control the */

- /* glyph loading process (e.g., whether the outline */

- /* should be scaled, whether to load bitmaps or not, */

- /* whether to hint the outline, etc). */

- /* */

- /* <Return> */

- /* FreeType error code. 0 means success. */

- /* */

- FT_LOCAL_DEF( FT_Error )

- TT_Load_Glyph( TT_Size size,

- TT_GlyphSlot glyph,

- FT_UInt glyph_index,

- FT_Int32 load_flags )

- {

- FT_Error error;

- TT_LoaderRec loader;

- error = FT_Err_Ok;

-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS

- /* try to load embedded bitmap if any */

- /* */

- /* XXX: The convention should be emphasized in */

- /* the documents because it can be confusing. */

- if ( size->strike_index != 0xFFFFFFFFUL &&

- ( load_flags & FT_LOAD_NO_BITMAP ) == 0 )

- {

- error = load_sbit_image( size, glyph, glyph_index, load_flags );

- if ( !error )

- {

- if ( FT_IS_SCALABLE( glyph->face ) )

- {

- /* for the bbox we need the header only */

- (void)tt_loader_init( &loader, size, glyph, load_flags, TRUE );

- (void)load_truetype_glyph( &loader, glyph_index, 0, TRUE );

- glyph->linearHoriAdvance = loader.linear;

- glyph->linearVertAdvance = loader.top_bearing + loader.bbox.yMax -

- loader.vadvance;

- /* sanity check: if `horiAdvance' in the sbit metric */

- /* structure isn't set, use `linearHoriAdvance' */

- if ( !glyph->metrics.horiAdvance && glyph->linearHoriAdvance )

- glyph->metrics.horiAdvance =

- FT_MulFix( glyph->linearHoriAdvance,

- size->root.metrics.x_scale );

- }

- return FT_Err_Ok;

- }

-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */

- /* if FT_LOAD_NO_SCALE is not set, `ttmetrics' must be valid */

- if ( !( load_flags & FT_LOAD_NO_SCALE ) && !size->ttmetrics.valid )

- return FT_THROW( Invalid_Size_Handle );

- if ( load_flags & FT_LOAD_SBITS_ONLY )

- return FT_THROW( Invalid_Argument );

- error = tt_loader_init( &loader, size, glyph, load_flags, FALSE );

- if ( error )

- return error;

- glyph->format = FT_GLYPH_FORMAT_OUTLINE;

- glyph->num_subglyphs = 0;

- glyph->outline.flags = 0;

- /* main loading loop */

- error = load_truetype_glyph( &loader, glyph_index, 0, FALSE );

- if ( !error )

- {

- if ( glyph->format == FT_GLYPH_FORMAT_COMPOSITE )

- {

- glyph->num_subglyphs = loader.gloader->base.num_subglyphs;

- glyph->subglyphs = loader.gloader->base.subglyphs;

- }

- else

- {

- glyph->outline = loader.gloader->base.outline;

- glyph->outline.flags &= ~FT_OUTLINE_SINGLE_PASS;

- /* Translate array so that (0,0) is the glyph's origin. Note */

- /* that this behaviour is independent on the value of bit 1 of */

- /* the `flags' field in the `head' table -- at least major */

- /* applications like Acroread indicate that. */

- if ( loader.pp1.x )

- FT_Outline_Translate( &glyph->outline, -loader.pp1.x, 0 );

- }

-#ifdef TT_USE_BYTECODE_INTERPRETER

- if ( IS_HINTED( load_flags ) )

- {

- if ( loader.exec->GS.scan_control )

- {

- /* convert scan conversion mode to FT_OUTLINE_XXX flags */

- switch ( loader.exec->GS.scan_type )

- {

- case 0: /* simple drop-outs including stubs */

- glyph->outline.flags |= FT_OUTLINE_INCLUDE_STUBS;

- break;

- case 1: /* simple drop-outs excluding stubs */

- /* nothing; it's the default rendering mode */

- break;

- case 4: /* smart drop-outs including stubs */

- glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS |

- FT_OUTLINE_INCLUDE_STUBS;

- break;

- case 5: /* smart drop-outs excluding stubs */

- glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS;

- break;

- default: /* no drop-out control */

- glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;

- break;

- }

- else

- glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;

- }

-#endif /* TT_USE_BYTECODE_INTERPRETER */

- compute_glyph_metrics( &loader, glyph_index );

- }

- /* Set the `high precision' bit flag. */

- /* This is _critical_ to get correct output for monochrome */

- /* TrueType glyphs at all sizes using the bytecode interpreter. */

- /* */

- if ( !( load_flags & FT_LOAD_NO_SCALE ) &&

- size->root.metrics.y_ppem < 24 )

- glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;

- return error;

- }

-/* END */