ref: 1e2eb65048f75c64b68708efed6ce904c31f3b2f
dir: /src/base/ftobjs.c/
/****************************************************************************
*
* ftobjs.c
*
* The FreeType private base classes (body).
*
* Copyright (C) 1996-2022 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
#include <freetype/ftlist.h>
#include <freetype/ftoutln.h>
#include <freetype/ftfntfmt.h>
#include <freetype/otsvg.h>
#include <freetype/internal/ftvalid.h>
#include <freetype/internal/ftobjs.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftrfork.h>
#include <freetype/internal/ftstream.h>
#include <freetype/internal/sfnt.h> /* for SFNT_Load_Table_Func */
#include <freetype/internal/psaux.h> /* for PS_Driver */
#include <freetype/internal/svginterface.h>
#include <freetype/tttables.h>
#include <freetype/tttags.h>
#include <freetype/ttnameid.h>
#include <freetype/internal/services/svprop.h>
#include <freetype/internal/services/svsfnt.h>
#include <freetype/internal/services/svpostnm.h>
#include <freetype/internal/services/svgldict.h>
#include <freetype/internal/services/svttcmap.h>
#include <freetype/internal/services/svkern.h>
#include <freetype/internal/services/svtteng.h>
#include <freetype/ftdriver.h>
#ifdef FT_CONFIG_OPTION_MAC_FONTS
#include "ftbase.h"
#endif
#ifdef FT_DEBUG_LEVEL_TRACE
#include <freetype/ftbitmap.h>
#if defined( _MSC_VER ) /* Visual C++ (and Intel C++) */
/* We disable the warning `conversion from XXX to YYY, */
/* possible loss of data' in order to compile cleanly with */
/* the maximum level of warnings: `md5.c' is non-FreeType */
/* code, and it gets used during development builds only. */
#pragma warning( push )
#pragma warning( disable : 4244 )
#endif /* _MSC_VER */
/* It's easiest to include `md5.c' directly. However, since OpenSSL */
/* also provides the same functions, there might be conflicts if */
/* both FreeType and OpenSSL are built as static libraries. For */
/* this reason, we put the MD5 stuff into the `FT_' namespace. */
#define MD5_u32plus FT_MD5_u32plus
#define MD5_CTX FT_MD5_CTX
#define MD5_Init FT_MD5_Init
#define MD5_Update FT_MD5_Update
#define MD5_Final FT_MD5_Final
#undef HAVE_OPENSSL
#include "md5.c"
#if defined( _MSC_VER )
#pragma warning( pop )
#endif
/* This array must stay in sync with the @FT_Pixel_Mode enumeration */
/* (in file `ftimage.h`). */
static const char* const pixel_modes[] =
{
"none",
"monochrome bitmap",
"gray 8-bit bitmap",
"gray 2-bit bitmap",
"gray 4-bit bitmap",
"LCD 8-bit bitmap",
"vertical LCD 8-bit bitmap",
"BGRA 32-bit color image bitmap",
"SDF 8-bit bitmap"
};
#endif /* FT_DEBUG_LEVEL_TRACE */
#define GRID_FIT_METRICS
/* forward declaration */
static FT_Error
ft_open_face_internal( FT_Library library,
const FT_Open_Args* args,
FT_Long face_index,
FT_Face *aface,
FT_Bool test_mac_fonts );
FT_BASE_DEF( FT_Pointer )
ft_service_list_lookup( FT_ServiceDesc service_descriptors,
const char* service_id )
{
FT_Pointer result = NULL;
FT_ServiceDesc desc = service_descriptors;
if ( desc && service_id )
{
for ( ; desc->serv_id != NULL; desc++ )
{
if ( ft_strcmp( desc->serv_id, service_id ) == 0 )
{
result = (FT_Pointer)desc->serv_data;
break;
}
}
}
return result;
}
FT_BASE_DEF( void )
ft_validator_init( FT_Validator valid,
const FT_Byte* base,
const FT_Byte* limit,
FT_ValidationLevel level )
{
valid->base = base;
valid->limit = limit;
valid->level = level;
valid->error = FT_Err_Ok;
}
FT_BASE_DEF( FT_Int )
ft_validator_run( FT_Validator valid )
{
/* This function doesn't work! None should call it. */
FT_UNUSED( valid );
return -1;
}
FT_BASE_DEF( void )
ft_validator_error( FT_Validator valid,
FT_Error error )
{
/* since the cast below also disables the compiler's */
/* type check, we introduce a dummy variable, which */
/* will be optimized away */
volatile ft_jmp_buf* jump_buffer = &valid->jump_buffer;
valid->error = error;
/* throw away volatileness; use `jump_buffer' or the */
/* compiler may warn about an unused local variable */
ft_longjmp( *(ft_jmp_buf*) jump_buffer, 1 );
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** S T R E A M ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* create a new input stream from an FT_Open_Args structure */
/* */
FT_BASE_DEF( FT_Error )
FT_Stream_New( FT_Library library,
const FT_Open_Args* args,
FT_Stream *astream )
{
FT_Error error;
FT_Memory memory;
FT_Stream stream = NULL;
FT_UInt mode;
*astream = NULL;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !args )
return FT_THROW( Invalid_Argument );
memory = library->memory;
mode = args->flags &
( FT_OPEN_MEMORY | FT_OPEN_STREAM | FT_OPEN_PATHNAME );
if ( mode == FT_OPEN_MEMORY )
{
/* create a memory-based stream */
if ( FT_NEW( stream ) )
goto Exit;
FT_Stream_OpenMemory( stream,
(const FT_Byte*)args->memory_base,
(FT_ULong)args->memory_size );
stream->memory = memory;
}
#ifndef FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT
else if ( mode == FT_OPEN_PATHNAME )
{
/* create a normal system stream */
if ( FT_NEW( stream ) )
goto Exit;
stream->memory = memory;
error = FT_Stream_Open( stream, args->pathname );
if ( error )
FT_FREE( stream );
}
else if ( ( mode == FT_OPEN_STREAM ) && args->stream )
{
/* use an existing, user-provided stream */
/* in this case, we do not need to allocate a new stream object */
/* since the caller is responsible for closing it himself */
stream = args->stream;
stream->memory = memory;
error = FT_Err_Ok;
}
#endif
else
{
error = FT_THROW( Invalid_Argument );
if ( ( args->flags & FT_OPEN_STREAM ) && args->stream )
FT_Stream_Close( args->stream );
}
if ( !error )
*astream = stream;
Exit:
return error;
}
FT_BASE_DEF( void )
FT_Stream_Free( FT_Stream stream,
FT_Int external )
{
if ( stream )
{
FT_Memory memory = stream->memory;
FT_Stream_Close( stream );
if ( !external )
FT_FREE( stream );
}
}
/**************************************************************************
*
* 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 objs
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** FACE, SIZE & GLYPH SLOT OBJECTS ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
static FT_Error
ft_glyphslot_init( FT_GlyphSlot slot )
{
FT_Driver driver = slot->face->driver;
FT_Driver_Class clazz = driver->clazz;
FT_Memory memory = driver->root.memory;
FT_Error error = FT_Err_Ok;
FT_Slot_Internal internal = NULL;
slot->library = driver->root.library;
if ( FT_NEW( internal ) )
goto Exit;
slot->internal = internal;
if ( FT_DRIVER_USES_OUTLINES( driver ) )
error = FT_GlyphLoader_New( memory, &internal->loader );
if ( !error && clazz->init_slot )
error = clazz->init_slot( slot );
#ifdef FT_CONFIG_OPTION_SVG
/* if SVG table exists, allocate the space in `slot->other` */
if ( slot->face->face_flags & FT_FACE_FLAG_SVG )
{
FT_SVG_Document document;
if ( FT_NEW( document ) )
goto Exit;
slot->other = document;
}
#endif
Exit:
return error;
}
FT_BASE_DEF( void )
ft_glyphslot_free_bitmap( FT_GlyphSlot slot )
{
if ( slot->internal && ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) )
{
FT_Memory memory = FT_FACE_MEMORY( slot->face );
FT_FREE( slot->bitmap.buffer );
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
}
else
{
/* assume that the bitmap buffer was stolen or not */
/* allocated from the heap */
slot->bitmap.buffer = NULL;
}
}
/* overflow-resistant presetting of bitmap position and dimensions; */
/* also check whether the size is too large for rendering */
FT_BASE_DEF( FT_Bool )
ft_glyphslot_preset_bitmap( FT_GlyphSlot slot,
FT_Render_Mode mode,
const FT_Vector* origin )
{
FT_Outline* outline = &slot->outline;
FT_Bitmap* bitmap = &slot->bitmap;
FT_Pixel_Mode pixel_mode;
FT_BBox cbox, pbox;
FT_Pos x_shift = 0;
FT_Pos y_shift = 0;
FT_Pos x_left, y_top;
FT_Pos width, height, pitch;
if ( slot->format == FT_GLYPH_FORMAT_SVG )
{
FT_Module module;
SVG_Service svg_service;
module = FT_Get_Module( slot->library, "ot-svg" );
svg_service = (SVG_Service)module->clazz->module_interface;
return (FT_Bool)svg_service->preset_slot( module, slot, FALSE );
}
else if ( slot->format != FT_GLYPH_FORMAT_OUTLINE )
return 1;
if ( origin )
{
x_shift = origin->x;
y_shift = origin->y;
}
/* compute the control box, and grid-fit it, */
/* taking into account the origin shift */
FT_Outline_Get_CBox( outline, &cbox );
/* rough estimate of pixel box */
pbox.xMin = ( cbox.xMin >> 6 ) + ( x_shift >> 6 );
pbox.yMin = ( cbox.yMin >> 6 ) + ( y_shift >> 6 );
pbox.xMax = ( cbox.xMax >> 6 ) + ( x_shift >> 6 );
pbox.yMax = ( cbox.yMax >> 6 ) + ( y_shift >> 6 );
/* tiny remainder box */
cbox.xMin = ( cbox.xMin & 63 ) + ( x_shift & 63 );
cbox.yMin = ( cbox.yMin & 63 ) + ( y_shift & 63 );
cbox.xMax = ( cbox.xMax & 63 ) + ( x_shift & 63 );
cbox.yMax = ( cbox.yMax & 63 ) + ( y_shift & 63 );
switch ( mode )
{
case FT_RENDER_MODE_MONO:
pixel_mode = FT_PIXEL_MODE_MONO;
#if 1
/* x */
/* undocumented but confirmed: bbox values get rounded; */
/* we do asymmetric rounding so that the center of a pixel */
/* gets always included */
pbox.xMin += ( cbox.xMin + 31 ) >> 6;
pbox.xMax += ( cbox.xMax + 32 ) >> 6;
/* if the bbox collapsed, we add a pixel based on the total */
/* rounding remainder to cover most of the original cbox */
if ( pbox.xMin == pbox.xMax )
{
if ( ( ( cbox.xMin + 31 ) & 63 ) - 31 +
( ( cbox.xMax + 32 ) & 63 ) - 32 < 0 )
pbox.xMin -= 1;
else
pbox.xMax += 1;
}
/* y */
pbox.yMin += ( cbox.yMin + 31 ) >> 6;
pbox.yMax += ( cbox.yMax + 32 ) >> 6;
if ( pbox.yMin == pbox.yMax )
{
if ( ( ( cbox.yMin + 31 ) & 63 ) - 31 +
( ( cbox.yMax + 32 ) & 63 ) - 32 < 0 )
pbox.yMin -= 1;
else
pbox.yMax += 1;
}
break;
#else
goto Adjust;
#endif
case FT_RENDER_MODE_LCD:
pixel_mode = FT_PIXEL_MODE_LCD;
ft_lcd_padding( &cbox, slot, mode );
goto Adjust;
case FT_RENDER_MODE_LCD_V:
pixel_mode = FT_PIXEL_MODE_LCD_V;
ft_lcd_padding( &cbox, slot, mode );
goto Adjust;
case FT_RENDER_MODE_NORMAL:
case FT_RENDER_MODE_LIGHT:
default:
pixel_mode = FT_PIXEL_MODE_GRAY;
Adjust:
pbox.xMin += cbox.xMin >> 6;
pbox.yMin += cbox.yMin >> 6;
pbox.xMax += ( cbox.xMax + 63 ) >> 6;
pbox.yMax += ( cbox.yMax + 63 ) >> 6;
}
x_left = pbox.xMin;
y_top = pbox.yMax;
width = pbox.xMax - pbox.xMin;
height = pbox.yMax - pbox.yMin;
switch ( pixel_mode )
{
case FT_PIXEL_MODE_MONO:
pitch = ( ( width + 15 ) >> 4 ) << 1;
break;
case FT_PIXEL_MODE_LCD:
width *= 3;
pitch = FT_PAD_CEIL( width, 4 );
break;
case FT_PIXEL_MODE_LCD_V:
height *= 3;
/* fall through */
case FT_PIXEL_MODE_GRAY:
default:
pitch = width;
}
slot->bitmap_left = (FT_Int)x_left;
slot->bitmap_top = (FT_Int)y_top;
bitmap->pixel_mode = (unsigned char)pixel_mode;
bitmap->num_grays = 256;
bitmap->width = (unsigned int)width;
bitmap->rows = (unsigned int)height;
bitmap->pitch = pitch;
if ( pbox.xMin < -0x8000 || pbox.xMax > 0x7FFF ||
pbox.yMin < -0x8000 || pbox.yMax > 0x7FFF )
{
FT_TRACE3(( "ft_glyphslot_preset_bitmap: [%ld %ld %ld %ld]\n",
pbox.xMin, pbox.yMin, pbox.xMax, pbox.yMax ));
return 1;
}
return 0;
}
FT_BASE_DEF( void )
ft_glyphslot_set_bitmap( FT_GlyphSlot slot,
FT_Byte* buffer )
{
ft_glyphslot_free_bitmap( slot );
slot->bitmap.buffer = buffer;
FT_ASSERT( (slot->internal->flags & FT_GLYPH_OWN_BITMAP) == 0 );
}
FT_BASE_DEF( FT_Error )
ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot,
FT_ULong size )
{
FT_Memory memory = FT_FACE_MEMORY( slot->face );
FT_Error error;
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
FT_FREE( slot->bitmap.buffer );
else
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
FT_MEM_ALLOC( slot->bitmap.buffer, size );
return error;
}
static void
ft_glyphslot_clear( FT_GlyphSlot slot )
{
/* free bitmap if needed */
ft_glyphslot_free_bitmap( slot );
/* clear all public fields in the glyph slot */
slot->glyph_index = 0;
FT_ZERO( &slot->metrics );
FT_ZERO( &slot->outline );
slot->bitmap.width = 0;
slot->bitmap.rows = 0;
slot->bitmap.pitch = 0;
slot->bitmap.pixel_mode = 0;
/* `slot->bitmap.buffer' has been handled by ft_glyphslot_free_bitmap */
slot->bitmap_left = 0;
slot->bitmap_top = 0;
slot->num_subglyphs = 0;
slot->subglyphs = NULL;
slot->control_data = NULL;
slot->control_len = 0;
#ifndef FT_CONFIG_OPTION_SVG
slot->other = NULL;
#else
if ( !( slot->face->face_flags & FT_FACE_FLAG_SVG ) )
slot->other = NULL;
else
{
if ( slot->internal->flags & FT_GLYPH_OWN_GZIP_SVG )
{
FT_Memory memory = slot->face->memory;
FT_SVG_Document doc = (FT_SVG_Document)slot->other;
FT_FREE( doc->svg_document );
slot->internal->load_flags &= ~FT_GLYPH_OWN_GZIP_SVG;
}
}
#endif
slot->format = FT_GLYPH_FORMAT_NONE;
slot->linearHoriAdvance = 0;
slot->linearVertAdvance = 0;
slot->advance.x = 0;
slot->advance.y = 0;
slot->lsb_delta = 0;
slot->rsb_delta = 0;
}
static void
ft_glyphslot_done( FT_GlyphSlot slot )
{
FT_Driver driver = slot->face->driver;
FT_Driver_Class clazz = driver->clazz;
FT_Memory memory = driver->root.memory;
#ifdef FT_CONFIG_OPTION_SVG
if ( slot->face->face_flags & FT_FACE_FLAG_SVG )
{
/* free memory in case SVG was there */
if ( slot->internal->flags & FT_GLYPH_OWN_GZIP_SVG )
{
FT_SVG_Document doc = (FT_SVG_Document)slot->other;
FT_FREE( doc->svg_document );
slot->internal->flags &= ~FT_GLYPH_OWN_GZIP_SVG;
}
FT_FREE( slot->other );
}
#endif
if ( clazz->done_slot )
clazz->done_slot( slot );
/* free bitmap buffer if needed */
ft_glyphslot_free_bitmap( slot );
/* slot->internal might be NULL in out-of-memory situations */
if ( slot->internal )
{
/* free glyph loader */
if ( FT_DRIVER_USES_OUTLINES( driver ) )
{
FT_GlyphLoader_Done( slot->internal->loader );
slot->internal->loader = NULL;
}
FT_FREE( slot->internal );
}
}
/* documentation is in ftobjs.h */
FT_BASE_DEF( FT_Error )
FT_New_GlyphSlot( FT_Face face,
FT_GlyphSlot *aslot )
{
FT_Error error;
FT_Driver driver;
FT_Driver_Class clazz;
FT_Memory memory;
FT_GlyphSlot slot = NULL;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !face->driver )
return FT_THROW( Invalid_Argument );
driver = face->driver;
clazz = driver->clazz;
memory = driver->root.memory;
FT_TRACE4(( "FT_New_GlyphSlot: Creating new slot object\n" ));
if ( !FT_ALLOC( slot, clazz->slot_object_size ) )
{
slot->face = face;
error = ft_glyphslot_init( slot );
if ( error )
{
ft_glyphslot_done( slot );
FT_FREE( slot );
goto Exit;
}
slot->next = face->glyph;
face->glyph = slot;
if ( aslot )
*aslot = slot;
}
else if ( aslot )
*aslot = NULL;
Exit:
FT_TRACE4(( "FT_New_GlyphSlot: Return 0x%x\n", error ));
return error;
}
/* documentation is in ftobjs.h */
FT_BASE_DEF( void )
FT_Done_GlyphSlot( FT_GlyphSlot slot )
{
if ( slot )
{
FT_Driver driver = slot->face->driver;
FT_Memory memory = driver->root.memory;
FT_GlyphSlot prev;
FT_GlyphSlot cur;
/* Remove slot from its parent face's list */
prev = NULL;
cur = slot->face->glyph;
while ( cur )
{
if ( cur == slot )
{
if ( !prev )
slot->face->glyph = cur->next;
else
prev->next = cur->next;
/* finalize client-specific data */
if ( slot->generic.finalizer )
slot->generic.finalizer( slot );
ft_glyphslot_done( slot );
FT_FREE( slot );
break;
}
prev = cur;
cur = cur->next;
}
}
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( void )
FT_Set_Transform( FT_Face face,
FT_Matrix* matrix,
FT_Vector* delta )
{
FT_Face_Internal internal;
if ( !face )
return;
internal = face->internal;
internal->transform_flags = 0;
if ( !matrix )
{
internal->transform_matrix.xx = 0x10000L;
internal->transform_matrix.xy = 0;
internal->transform_matrix.yx = 0;
internal->transform_matrix.yy = 0x10000L;
matrix = &internal->transform_matrix;
}
else
internal->transform_matrix = *matrix;
/* set transform_flags bit flag 0 if `matrix' isn't the identity */
if ( ( matrix->xy | matrix->yx ) ||
matrix->xx != 0x10000L ||
matrix->yy != 0x10000L )
internal->transform_flags |= 1;
if ( !delta )
{
internal->transform_delta.x = 0;
internal->transform_delta.y = 0;
delta = &internal->transform_delta;
}
else
internal->transform_delta = *delta;
/* set transform_flags bit flag 1 if `delta' isn't the null vector */
if ( delta->x | delta->y )
internal->transform_flags |= 2;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( void )
FT_Get_Transform( FT_Face face,
FT_Matrix* matrix,
FT_Vector* delta )
{
FT_Face_Internal internal;
if ( !face )
return;
internal = face->internal;
if ( matrix )
*matrix = internal->transform_matrix;
if ( delta )
*delta = internal->transform_delta;
}
static FT_Renderer
ft_lookup_glyph_renderer( FT_GlyphSlot slot );
#ifdef GRID_FIT_METRICS
static void
ft_glyphslot_grid_fit_metrics( FT_GlyphSlot slot,
FT_Bool vertical )
{
FT_Glyph_Metrics* metrics = &slot->metrics;
FT_Pos right, bottom;
if ( vertical )
{
metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX );
metrics->horiBearingY = FT_PIX_CEIL_LONG( metrics->horiBearingY );
right = FT_PIX_CEIL_LONG( ADD_LONG( metrics->vertBearingX,
metrics->width ) );
bottom = FT_PIX_CEIL_LONG( ADD_LONG( metrics->vertBearingY,
metrics->height ) );
metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX );
metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY );
metrics->width = SUB_LONG( right,
metrics->vertBearingX );
metrics->height = SUB_LONG( bottom,
metrics->vertBearingY );
}
else
{
metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX );
metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY );
right = FT_PIX_CEIL_LONG( ADD_LONG( metrics->horiBearingX,
metrics->width ) );
bottom = FT_PIX_FLOOR( SUB_LONG( metrics->horiBearingY,
metrics->height ) );
metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX );
metrics->horiBearingY = FT_PIX_CEIL_LONG( metrics->horiBearingY );
metrics->width = SUB_LONG( right,
metrics->horiBearingX );
metrics->height = SUB_LONG( metrics->horiBearingY,
bottom );
}
metrics->horiAdvance = FT_PIX_ROUND_LONG( metrics->horiAdvance );
metrics->vertAdvance = FT_PIX_ROUND_LONG( metrics->vertAdvance );
}
#endif /* GRID_FIT_METRICS */
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Load_Glyph( FT_Face face,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
FT_Error error;
FT_Driver driver;
FT_GlyphSlot slot;
FT_Library library;
FT_Bool autohint = FALSE;
FT_Module hinter;
TT_Face ttface = (TT_Face)face;
if ( !face || !face->size || !face->glyph )
return FT_THROW( Invalid_Face_Handle );
/* The validity test for `glyph_index' is performed by the */
/* font drivers. */
slot = face->glyph;
ft_glyphslot_clear( slot );
driver = face->driver;
library = driver->root.library;
hinter = library->auto_hinter;
/* undefined scale means no scale */
if ( face->size->metrics.x_ppem == 0 ||
face->size->metrics.y_ppem == 0 )
load_flags |= FT_LOAD_NO_SCALE;
/* resolve load flags dependencies */
if ( load_flags & FT_LOAD_NO_RECURSE )
load_flags |= FT_LOAD_NO_SCALE |
FT_LOAD_IGNORE_TRANSFORM;
if ( load_flags & FT_LOAD_NO_SCALE )
{
load_flags |= FT_LOAD_NO_HINTING |
FT_LOAD_NO_BITMAP;
load_flags &= ~FT_LOAD_RENDER;
}
if ( load_flags & FT_LOAD_BITMAP_METRICS_ONLY )
load_flags &= ~FT_LOAD_RENDER;
/*
* Determine whether we need to auto-hint or not.
* The general rules are:
*
* - Do only auto-hinting if we have
*
* - a hinter module,
* - a scalable font,
* - not a tricky font, and
* - no transforms except simple slants and/or rotations by
* integer multiples of 90 degrees.
*
* - Then, auto-hint if FT_LOAD_FORCE_AUTOHINT is set or if we don't
* have a native font hinter.
*
* - Otherwise, auto-hint for LIGHT hinting mode or if there isn't
* any hinting bytecode in the TrueType/OpenType font.
*
* - Exception: The font is `tricky' and requires the native hinter to
* load properly.
*/
if ( hinter &&
!( load_flags & FT_LOAD_NO_HINTING ) &&
!( load_flags & FT_LOAD_NO_AUTOHINT ) &&
FT_IS_SCALABLE( face ) &&
!FT_IS_TRICKY( face ) &&
( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) ||
( face->internal->transform_matrix.yx == 0 &&
face->internal->transform_matrix.xx != 0 ) ||
( face->internal->transform_matrix.xx == 0 &&
face->internal->transform_matrix.yx != 0 ) ) )
{
if ( ( load_flags & FT_LOAD_FORCE_AUTOHINT ) ||
!FT_DRIVER_HAS_HINTER( driver ) )
autohint = TRUE;
else
{
FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags );
FT_Bool is_light_type1;
/* only the new Adobe engine (for both CFF and Type 1) is `light'; */
/* we use `strstr' to catch both `Type 1' and `CID Type 1' */
is_light_type1 =
ft_strstr( FT_Get_Font_Format( face ), "Type 1" ) != NULL &&
((PS_Driver)driver)->hinting_engine == FT_HINTING_ADOBE;
/* the check for `num_locations' assures that we actually */
/* test for instructions in a TTF and not in a CFF-based OTF */
/* */
/* since `maxSizeOfInstructions' might be unreliable, we */
/* check the size of the `fpgm' and `prep' tables, too -- */
/* the assumption is that there don't exist real TTFs where */
/* both `fpgm' and `prep' tables are missing */
if ( ( mode == FT_RENDER_MODE_LIGHT &&
( !FT_DRIVER_HINTS_LIGHTLY( driver ) &&
!is_light_type1 ) ) ||
( FT_IS_SFNT( face ) &&
ttface->num_locations &&
ttface->max_profile.maxSizeOfInstructions == 0 &&
ttface->font_program_size == 0 &&
ttface->cvt_program_size == 0 ) )
autohint = TRUE;
}
}
if ( autohint )
{
FT_AutoHinter_Interface hinting;
/* XXX: The use of the `FT_LOAD_XXX_ONLY` flags is not very */
/* elegant. */
/* try to load SVG documents if available */
if ( FT_HAS_SVG( face ) )
{
error = driver->clazz->load_glyph( slot, face->size,
glyph_index,
load_flags | FT_LOAD_SVG_ONLY );
if ( !error && slot->format == FT_GLYPH_FORMAT_SVG )
goto Load_Ok;
}
/* try to load embedded bitmaps if available */
if ( FT_HAS_FIXED_SIZES( face ) &&
( load_flags & FT_LOAD_NO_BITMAP ) == 0 )
{
error = driver->clazz->load_glyph( slot, face->size,
glyph_index,
load_flags | FT_LOAD_SBITS_ONLY );
if ( !error && slot->format == FT_GLYPH_FORMAT_BITMAP )
goto Load_Ok;
}
{
FT_Face_Internal internal = face->internal;
FT_Int transform_flags = internal->transform_flags;
/* since the auto-hinter calls FT_Load_Glyph by itself, */
/* make sure that glyphs aren't transformed */
internal->transform_flags = 0;
/* load auto-hinted outline */
hinting = (FT_AutoHinter_Interface)hinter->clazz->module_interface;
error = hinting->load_glyph( (FT_AutoHinter)hinter,
slot, face->size,
glyph_index, load_flags );
internal->transform_flags = transform_flags;
}
}
else
{
error = driver->clazz->load_glyph( slot,
face->size,
glyph_index,
load_flags );
if ( error )
goto Exit;
if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
{
/* check that the loaded outline is correct */
error = FT_Outline_Check( &slot->outline );
if ( error )
goto Exit;
#ifdef GRID_FIT_METRICS
if ( !( load_flags & FT_LOAD_NO_HINTING ) )
ft_glyphslot_grid_fit_metrics(
slot,
FT_BOOL( load_flags & FT_LOAD_VERTICAL_LAYOUT ) );
#endif
}
}
Load_Ok:
/* compute the advance */
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
slot->advance.x = 0;
slot->advance.y = slot->metrics.vertAdvance;
}
else
{
slot->advance.x = slot->metrics.horiAdvance;
slot->advance.y = 0;
}
/* compute the linear advance in 16.16 pixels */
if ( ( load_flags & FT_LOAD_LINEAR_DESIGN ) == 0 &&
FT_IS_SCALABLE( face ) )
{
FT_Size_Metrics* metrics = &face->size->metrics;
/* it's tricky! */
slot->linearHoriAdvance = FT_MulDiv( slot->linearHoriAdvance,
metrics->x_scale, 64 );
slot->linearVertAdvance = FT_MulDiv( slot->linearVertAdvance,
metrics->y_scale, 64 );
}
if ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) == 0 )
{
FT_Face_Internal internal = face->internal;
/* now, transform the glyph image if needed */
if ( internal->transform_flags )
{
/* get renderer */
FT_Renderer renderer = ft_lookup_glyph_renderer( slot );
if ( renderer )
error = renderer->clazz->transform_glyph(
renderer, slot,
&internal->transform_matrix,
&internal->transform_delta );
else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
{
/* apply `standard' transformation if no renderer is available */
if ( internal->transform_flags & 1 )
FT_Outline_Transform( &slot->outline,
&internal->transform_matrix );
if ( internal->transform_flags & 2 )
FT_Outline_Translate( &slot->outline,
internal->transform_delta.x,
internal->transform_delta.y );
}
/* transform advance */
FT_Vector_Transform( &slot->advance, &internal->transform_matrix );
}
}
slot->glyph_index = glyph_index;
slot->internal->load_flags = load_flags;
/* do we need to render the image or preset the bitmap now? */
if ( !error &&
( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
slot->format != FT_GLYPH_FORMAT_BITMAP &&
slot->format != FT_GLYPH_FORMAT_COMPOSITE )
{
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;
if ( load_flags & FT_LOAD_RENDER )
error = FT_Render_Glyph( slot, mode );
else
ft_glyphslot_preset_bitmap( slot, mode, NULL );
}
#ifdef FT_DEBUG_LEVEL_TRACE
FT_TRACE5(( "FT_Load_Glyph: index %d, flags 0x%x\n",
glyph_index, load_flags ));
FT_TRACE5(( " bitmap %dx%d %s, %s (mode %d)\n",
slot->bitmap.width,
slot->bitmap.rows,
slot->outline.points ?
slot->bitmap.buffer ? "rendered"
: "preset"
:
slot->internal->flags & FT_GLYPH_OWN_BITMAP ? "owned"
: "unowned",
pixel_modes[slot->bitmap.pixel_mode],
slot->bitmap.pixel_mode ));
FT_TRACE5(( "\n" ));
FT_TRACE5(( " x advance: %f\n", slot->advance.x / 64.0 ));
FT_TRACE5(( " y advance: %f\n", slot->advance.y / 64.0 ));
FT_TRACE5(( " linear x advance: %f\n",
slot->linearHoriAdvance / 65536.0 ));
FT_TRACE5(( " linear y advance: %f\n",
slot->linearVertAdvance / 65536.0 ));
{
FT_Glyph_Metrics* metrics = &slot->metrics;
FT_TRACE5(( " metrics:\n" ));
FT_TRACE5(( " width: %f\n", metrics->width / 64.0 ));
FT_TRACE5(( " height: %f\n", metrics->height / 64.0 ));
FT_TRACE5(( "\n" ));
FT_TRACE5(( " horiBearingX: %f\n", metrics->horiBearingX / 64.0 ));
FT_TRACE5(( " horiBearingY: %f\n", metrics->horiBearingY / 64.0 ));
FT_TRACE5(( " horiAdvance: %f\n", metrics->horiAdvance / 64.0 ));
FT_TRACE5(( "\n" ));
FT_TRACE5(( " vertBearingX: %f\n", metrics->vertBearingX / 64.0 ));
FT_TRACE5(( " vertBearingY: %f\n", metrics->vertBearingY / 64.0 ));
FT_TRACE5(( " vertAdvance: %f\n", metrics->vertAdvance / 64.0 ));
}
#endif
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Load_Char( FT_Face face,
FT_ULong char_code,
FT_Int32 load_flags )
{
FT_UInt glyph_index;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
glyph_index = (FT_UInt)char_code;
if ( face->charmap )
glyph_index = FT_Get_Char_Index( face, char_code );
return FT_Load_Glyph( face, glyph_index, load_flags );
}
/* destructor for sizes list */
static void
destroy_size( FT_Memory memory,
FT_Size size,
FT_Driver driver )
{
/* finalize client-specific data */
if ( size->generic.finalizer )
size->generic.finalizer( size );
/* finalize format-specific stuff */
if ( driver->clazz->done_size )
driver->clazz->done_size( size );
FT_FREE( size->internal );
FT_FREE( size );
}
static void
ft_cmap_done_internal( FT_CMap cmap );
static void
destroy_charmaps( FT_Face face,
FT_Memory memory )
{
FT_Int n;
if ( !face )
return;
for ( n = 0; n < face->num_charmaps; n++ )
{
FT_CMap cmap = FT_CMAP( face->charmaps[n] );
ft_cmap_done_internal( cmap );
face->charmaps[n] = NULL;
}
FT_FREE( face->charmaps );
face->num_charmaps = 0;
}
/* destructor for faces list */
static void
destroy_face( FT_Memory memory,
FT_Face face,
FT_Driver driver )
{
FT_Driver_Class clazz = driver->clazz;
/* discard auto-hinting data */
if ( face->autohint.finalizer )
face->autohint.finalizer( face->autohint.data );
/* Discard glyph slots for this face. */
/* Beware! FT_Done_GlyphSlot() changes the field `face->glyph' */
while ( face->glyph )
FT_Done_GlyphSlot( face->glyph );
/* discard all sizes for this face */
FT_List_Finalize( &face->sizes_list,
(FT_List_Destructor)destroy_size,
memory,
driver );
face->size = NULL;
/* now discard client data */
if ( face->generic.finalizer )
face->generic.finalizer( face );
/* discard charmaps */
destroy_charmaps( face, memory );
/* finalize format-specific stuff */
if ( clazz->done_face )
clazz->done_face( face );
/* close the stream for this face if needed */
FT_Stream_Free(
face->stream,
( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 );
face->stream = NULL;
/* get rid of it */
if ( face->internal )
{
FT_FREE( face->internal );
}
FT_FREE( face );
}
static void
Destroy_Driver( FT_Driver driver )
{
FT_List_Finalize( &driver->faces_list,
(FT_List_Destructor)destroy_face,
driver->root.memory,
driver );
}
/**************************************************************************
*
* @Function:
* find_unicode_charmap
*
* @Description:
* This function finds a Unicode charmap, if there is one.
* And if there is more than one, it tries to favour the more
* extensive one, i.e., one that supports UCS-4 against those which
* are limited to the BMP (said UCS-2 encoding.)
*
* This function is called from open_face() (just below), and also
* from FT_Select_Charmap( ..., FT_ENCODING_UNICODE ).
*/
static FT_Error
find_unicode_charmap( FT_Face face )
{
FT_CharMap* first;
FT_CharMap* cur;
/* caller should have already checked that `face' is valid */
FT_ASSERT( face );
first = face->charmaps;
if ( !first )
return FT_THROW( Invalid_CharMap_Handle );
/*
* The original TrueType specification(s) only specified charmap
* formats that are capable of mapping 8 or 16 bit character codes to
* glyph indices.
*
* However, recent updates to the Apple and OpenType specifications
* introduced new formats that are capable of mapping 32-bit character
* codes as well. And these are already used on some fonts, mainly to
* map non-BMP Asian ideographs as defined in Unicode.
*
* For compatibility purposes, these fonts generally come with
* *several* Unicode charmaps:
*
* - One of them in the "old" 16-bit format, that cannot access
* all glyphs in the font.
*
* - Another one in the "new" 32-bit format, that can access all
* the glyphs.
*
* This function has been written to always favor a 32-bit charmap
* when found. Otherwise, a 16-bit one is returned when found.
*/
/* Since the `interesting' table, with IDs (3,10), is normally the */
/* last one, we loop backwards. This loses with type1 fonts with */
/* non-BMP characters (<.0001%), this wins with .ttf with non-BMP */
/* chars (.01% ?), and this is the same about 99.99% of the time! */
cur = first + face->num_charmaps; /* points after the last one */
for ( ; --cur >= first; )
{
if ( cur[0]->encoding == FT_ENCODING_UNICODE )
{
/* XXX If some new encodings to represent UCS-4 are added, */
/* they should be added here. */
if ( ( cur[0]->platform_id == TT_PLATFORM_MICROSOFT &&
cur[0]->encoding_id == TT_MS_ID_UCS_4 ) ||
( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE &&
cur[0]->encoding_id == TT_APPLE_ID_UNICODE_32 ) )
{
face->charmap = cur[0];
return FT_Err_Ok;
}
}
}
/* We do not have any UCS-4 charmap. */
/* Do the loop again and search for UCS-2 charmaps. */
cur = first + face->num_charmaps;
for ( ; --cur >= first; )
{
if ( cur[0]->encoding == FT_ENCODING_UNICODE )
{
face->charmap = cur[0];
return FT_Err_Ok;
}
}
return FT_THROW( Invalid_CharMap_Handle );
}
/**************************************************************************
*
* @Function:
* find_variant_selector_charmap
*
* @Description:
* This function finds the variant selector charmap, if there is one.
* There can only be one (platform=0, specific=5, format=14).
*/
static FT_CharMap
find_variant_selector_charmap( FT_Face face )
{
FT_CharMap* first;
FT_CharMap* end;
FT_CharMap* cur;
/* caller should have already checked that `face' is valid */
FT_ASSERT( face );
first = face->charmaps;
if ( !first )
return NULL;
end = first + face->num_charmaps; /* points after the last one */
for ( cur = first; cur < end; cur++ )
{
if ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE &&
cur[0]->encoding_id == TT_APPLE_ID_VARIANT_SELECTOR &&
FT_Get_CMap_Format( cur[0] ) == 14 )
return cur[0];
}
return NULL;
}
/**************************************************************************
*
* @Function:
* open_face
*
* @Description:
* This function does some work for FT_Open_Face().
*/
static FT_Error
open_face( FT_Driver driver,
FT_Stream *astream,
FT_Bool external_stream,
FT_Long face_index,
FT_Int num_params,
FT_Parameter* params,
FT_Face *aface )
{
FT_Memory memory;
FT_Driver_Class clazz;
FT_Face face = NULL;
FT_Face_Internal internal = NULL;
FT_Error error, error2;
clazz = driver->clazz;
memory = driver->root.memory;
/* allocate the face object and perform basic initialization */
if ( FT_ALLOC( face, clazz->face_object_size ) )
goto Fail;
face->driver = driver;
face->memory = memory;
face->stream = *astream;
/* set the FT_FACE_FLAG_EXTERNAL_STREAM bit for FT_Done_Face */
if ( external_stream )
face->face_flags |= FT_FACE_FLAG_EXTERNAL_STREAM;
if ( FT_NEW( internal ) )
goto Fail;
face->internal = internal;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
{
int i;
face->internal->incremental_interface = NULL;
for ( i = 0; i < num_params && !face->internal->incremental_interface;
i++ )
if ( params[i].tag == FT_PARAM_TAG_INCREMENTAL )
face->internal->incremental_interface =
(FT_Incremental_Interface)params[i].data;
}
#endif
face->internal->random_seed = -1;
if ( clazz->init_face )
error = clazz->init_face( *astream,
face,
(FT_Int)face_index,
num_params,
params );
*astream = face->stream; /* Stream may have been changed. */
if ( error )
goto Fail;
/* select Unicode charmap by default */
error2 = find_unicode_charmap( face );
/* if no Unicode charmap can be found, FT_Err_Invalid_CharMap_Handle */
/* is returned. */
/* no error should happen, but we want to play safe */
if ( error2 && FT_ERR_NEQ( error2, Invalid_CharMap_Handle ) )
{
error = error2;
goto Fail;
}
*aface = face;
Fail:
if ( error )
{
destroy_charmaps( face, memory );
if ( clazz->done_face )
clazz->done_face( face );
FT_FREE( internal );
FT_FREE( face );
*aface = NULL;
}
return error;
}
/* there's a Mac-specific extended implementation of FT_New_Face() */
/* in src/base/ftmac.c */
#ifndef FT_MACINTOSH
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Face( FT_Library library,
const char* pathname,
FT_Long face_index,
FT_Face *aface )
{
FT_Open_Args args;
/* test for valid `library' and `aface' delayed to `FT_Open_Face' */
if ( !pathname )
return FT_THROW( Invalid_Argument );
args.flags = FT_OPEN_PATHNAME;
args.pathname = (char*)pathname;
args.stream = NULL;
return ft_open_face_internal( library, &args, face_index, aface, 1 );
}
#endif
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Memory_Face( FT_Library library,
const FT_Byte* file_base,
FT_Long file_size,
FT_Long face_index,
FT_Face *aface )
{
FT_Open_Args args;
/* test for valid `library' and `face' delayed to `FT_Open_Face' */
if ( !file_base )
return FT_THROW( Invalid_Argument );
args.flags = FT_OPEN_MEMORY;
args.memory_base = file_base;
args.memory_size = file_size;
args.stream = NULL;
return ft_open_face_internal( library, &args, face_index, aface, 1 );
}
#ifdef FT_CONFIG_OPTION_MAC_FONTS
/* The behavior here is very similar to that in base/ftmac.c, but it */
/* is designed to work on non-mac systems, so no mac specific calls. */
/* */
/* We look at the file and determine if it is a mac dfont file or a mac */
/* resource file, or a macbinary file containing a mac resource file. */
/* */
/* Unlike ftmac I'm not going to look at a `FOND'. I don't really see */
/* the point, especially since there may be multiple `FOND' resources. */
/* Instead I'll just look for `sfnt' and `POST' resources, ordered as */
/* they occur in the file. */
/* */
/* Note that multiple `POST' resources do not mean multiple postscript */
/* fonts; they all get jammed together to make what is essentially a */
/* pfb file. */
/* */
/* We aren't interested in `NFNT' or `FONT' bitmap resources. */
/* */
/* As soon as we get an `sfnt' load it into memory and pass it off to */
/* FT_Open_Face. */
/* */
/* If we have a (set of) `POST' resources, massage them into a (memory) */
/* pfb file and pass that to FT_Open_Face. (As with ftmac.c I'm not */
/* going to try to save the kerning info. After all that lives in the */
/* `FOND' which isn't in the file containing the `POST' resources so */
/* we don't really have access to it. */
/* Finalizer for a memory stream; gets called by FT_Done_Face(). */
/* It frees the memory it uses. */
/* From `ftmac.c'. */
static void
memory_stream_close( FT_Stream stream )
{
FT_Memory memory = stream->memory;
FT_FREE( stream->base );
stream->size = 0;
stream->close = NULL;
}
/* Create a new memory stream from a buffer and a size. */
/* From `ftmac.c'. */
static FT_Error
new_memory_stream( FT_Library library,
FT_Byte* base,
FT_ULong size,
FT_Stream_CloseFunc close,
FT_Stream *astream )
{
FT_Error error;
FT_Memory memory;
FT_Stream stream = NULL;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !base )
return FT_THROW( Invalid_Argument );
*astream = NULL;
memory = library->memory;
if ( FT_NEW( stream ) )
goto Exit;
FT_Stream_OpenMemory( stream, base, size );
stream->close = close;
*astream = stream;
Exit:
return error;
}
/* Create a new FT_Face given a buffer and a driver name. */
/* From `ftmac.c'. */
FT_LOCAL_DEF( FT_Error )
open_face_from_buffer( FT_Library library,
FT_Byte* base,
FT_ULong size,
FT_Long face_index,
const char* driver_name,
FT_Face *aface )
{
FT_Open_Args args;
FT_Error error;
FT_Stream stream = NULL;
FT_Memory memory = library->memory;
error = new_memory_stream( library,
base,
size,
memory_stream_close,
&stream );
if ( error )
{
FT_FREE( base );
return error;
}
args.flags = FT_OPEN_STREAM;
args.stream = stream;
if ( driver_name )
{
args.flags = args.flags | FT_OPEN_DRIVER;
args.driver = FT_Get_Module( library, driver_name );
}
#ifdef FT_MACINTOSH
/* At this point, the face index has served its purpose; */
/* whoever calls this function has already used it to */
/* locate the correct font data. We should not propagate */
/* this index to FT_Open_Face() (unless it is negative). */
if ( face_index > 0 )
face_index &= 0x7FFF0000L; /* retain GX data */
#endif
error = ft_open_face_internal( library, &args, face_index, aface, 0 );
if ( !error )
(*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM;
else
#ifdef FT_MACINTOSH
FT_Stream_Free( stream, 0 );
#else
{
FT_Stream_Close( stream );
FT_FREE( stream );
}
#endif
return error;
}
/* Look up `TYP1' or `CID ' table from sfnt table directory. */
/* `offset' and `length' must exclude the binary header in tables. */
/* Type 1 and CID-keyed font drivers should recognize sfnt-wrapped */
/* format too. Here, since we can't expect that the TrueType font */
/* driver is loaded unconditionally, we must parse the font by */
/* ourselves. We are only interested in the name of the table and */
/* the offset. */
static FT_Error
ft_lookup_PS_in_sfnt_stream( FT_Stream stream,
FT_Long face_index,
FT_ULong* offset,
FT_ULong* length,
FT_Bool* is_sfnt_cid )
{
FT_Error error;
FT_UShort numTables;
FT_Long pstable_index;
FT_ULong tag;
int i;
*offset = 0;
*length = 0;
*is_sfnt_cid = FALSE;
/* TODO: support for sfnt-wrapped PS/CID in TTC format */
/* version check for 'typ1' (should be ignored?) */
if ( FT_READ_ULONG( tag ) )
return error;
if ( tag != TTAG_typ1 )
return FT_THROW( Unknown_File_Format );
if ( FT_READ_USHORT( numTables ) )
return error;
if ( FT_STREAM_SKIP( 2 * 3 ) ) /* skip binary search header */
return error;
pstable_index = -1;
*is_sfnt_cid = FALSE;
for ( i = 0; i < numTables; i++ )
{
if ( FT_READ_ULONG( tag ) || FT_STREAM_SKIP( 4 ) ||
FT_READ_ULONG( *offset ) || FT_READ_ULONG( *length ) )
return error;
if ( tag == TTAG_CID )
{
pstable_index++;
*offset += 22;
*length -= 22;
*is_sfnt_cid = TRUE;
if ( face_index < 0 )
return FT_Err_Ok;
}
else if ( tag == TTAG_TYP1 )
{
pstable_index++;
*offset += 24;
*length -= 24;
*is_sfnt_cid = FALSE;
if ( face_index < 0 )
return FT_Err_Ok;
}
if ( face_index >= 0 && pstable_index == face_index )
return FT_Err_Ok;
}
return FT_THROW( Table_Missing );
}
FT_LOCAL_DEF( FT_Error )
open_face_PS_from_sfnt_stream( FT_Library library,
FT_Stream stream,
FT_Long face_index,
FT_Int num_params,
FT_Parameter *params,
FT_Face *aface )
{
FT_Error error;
FT_Memory memory = library->memory;
FT_ULong offset, length;
FT_ULong pos;
FT_Bool is_sfnt_cid;
FT_Byte* sfnt_ps = NULL;
FT_UNUSED( num_params );
FT_UNUSED( params );
/* ignore GX stuff */
if ( face_index > 0 )
face_index &= 0xFFFFL;
pos = FT_STREAM_POS();
error = ft_lookup_PS_in_sfnt_stream( stream,
face_index,
&offset,
&length,
&is_sfnt_cid );
if ( error )
goto Exit;
if ( offset > stream->size )
{
FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table offset\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
else if ( length > stream->size - offset )
{
FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table length\n" ));
error = FT_THROW( Invalid_Table );
goto Exit;
}
error = FT_Stream_Seek( stream, pos + offset );
if ( error )
goto Exit;
if ( FT_QALLOC( sfnt_ps, (FT_Long)length ) )
goto Exit;
error = FT_Stream_Read( stream, (FT_Byte *)sfnt_ps, length );
if ( error )
{
FT_FREE( sfnt_ps );
goto Exit;
}
error = open_face_from_buffer( library,
sfnt_ps,
length,
FT_MIN( face_index, 0 ),
is_sfnt_cid ? "cid" : "type1",
aface );
Exit:
{
FT_Error error1;
if ( FT_ERR_EQ( error, Unknown_File_Format ) )
{
error1 = FT_Stream_Seek( stream, pos );
if ( error1 )
return error1;
}
return error;
}
}
#ifndef FT_MACINTOSH
/* The resource header says we've got resource_cnt `POST' (type1) */
/* resources in this file. They all need to be coalesced into */
/* one lump which gets passed on to the type1 driver. */
/* Here can be only one PostScript font in a file so face_index */
/* must be 0 (or -1). */
/* */
static FT_Error
Mac_Read_POST_Resource( FT_Library library,
FT_Stream stream,
FT_Long *offsets,
FT_Long resource_cnt,
FT_Long face_index,
FT_Face *aface )
{
FT_Error error = FT_ERR( Cannot_Open_Resource );
FT_Memory memory = library->memory;
FT_Byte* pfb_data = NULL;
int i, type, flags;
FT_ULong len;
FT_ULong pfb_len, pfb_pos, pfb_lenpos;
FT_ULong rlen, temp;
if ( face_index == -1 )
face_index = 0;
if ( face_index != 0 )
return error;
/* Find the length of all the POST resources, concatenated. Assume */
/* worst case (each resource in its own section). */
pfb_len = 0;
for ( i = 0; i < resource_cnt; i++ )
{
error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] );
if ( error )
goto Exit;
if ( FT_READ_ULONG( temp ) ) /* actually LONG */
goto Exit;
/* FT2 allocator takes signed long buffer length,
* too large value causing overflow should be checked
*/
FT_TRACE4(( " POST fragment #%d: length=0x%08lx"
" total pfb_len=0x%08lx\n",
i, temp, pfb_len + temp + 6 ));
if ( FT_MAC_RFORK_MAX_LEN < temp ||
FT_MAC_RFORK_MAX_LEN - temp < pfb_len + 6 )
{
FT_TRACE2(( " MacOS resource length cannot exceed"
" 0x%08lx\n",
FT_MAC_RFORK_MAX_LEN ));
error = FT_THROW( Invalid_Offset );
goto Exit;
}
pfb_len += temp + 6;
}
FT_TRACE2(( " total buffer size to concatenate"
" %ld POST fragments: 0x%08lx\n",
resource_cnt, pfb_len + 2 ));
if ( pfb_len + 2 < 6 )
{
FT_TRACE2(( " too long fragment length makes"
" pfb_len confused: pfb_len=0x%08lx\n",
pfb_len ));
error = FT_THROW( Array_Too_Large );
goto Exit;
}
if ( FT_QALLOC( pfb_data, (FT_Long)pfb_len + 2 ) )
goto Exit;
pfb_data[0] = 0x80;
pfb_data[1] = 1; /* Ascii section */
pfb_data[2] = 0; /* 4-byte length, fill in later */
pfb_data[3] = 0;
pfb_data[4] = 0;
pfb_data[5] = 0;
pfb_pos = 6;
pfb_lenpos = 2;
len = 0;
type = 1;
for ( i = 0; i < resource_cnt; i++ )
{
error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] );
if ( error )
goto Exit2;
if ( FT_READ_ULONG( rlen ) )
goto Exit2;
/* FT2 allocator takes signed long buffer length,
* too large fragment length causing overflow should be checked
*/
if ( 0x7FFFFFFFUL < rlen )
{
error = FT_THROW( Invalid_Offset );
goto Exit2;
}
if ( FT_READ_USHORT( flags ) )
goto Exit2;
FT_TRACE3(( "POST fragment[%d]:"
" offsets=0x%08lx, rlen=0x%08lx, flags=0x%04x\n",
i, offsets[i], rlen, flags ));
error = FT_ERR( Array_Too_Large );
/* postpone the check of `rlen longer than buffer' */
/* until `FT_Stream_Read' */
if ( ( flags >> 8 ) == 0 ) /* Comment, should not be loaded */
{
FT_TRACE3(( " Skip POST fragment #%d because it is a comment\n",
i ));
continue;
}
/* the flags are part of the resource, so rlen >= 2, */
/* but some fonts declare rlen = 0 for empty fragment */
if ( rlen > 2 )
rlen -= 2;
else
rlen = 0;
if ( ( flags >> 8 ) == type )
len += rlen;
else
{
FT_TRACE3(( " Write POST fragment #%d header (4-byte) to buffer"
" %p + 0x%08lx\n",
i, (void*)pfb_data, pfb_lenpos ));
if ( pfb_lenpos + 3 > pfb_len + 2 )
goto Exit2;
pfb_data[pfb_lenpos ] = (FT_Byte)( len );
pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 );
pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 );
pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 );
if ( ( flags >> 8 ) == 5 ) /* End of font mark */
break;
FT_TRACE3(( " Write POST fragment #%d header (6-byte) to buffer"
" %p + 0x%08lx\n",
i, (void*)pfb_data, pfb_pos ));
if ( pfb_pos + 6 > pfb_len + 2 )
goto Exit2;
pfb_data[pfb_pos++] = 0x80;
type = flags >> 8;
len = rlen;
pfb_data[pfb_pos++] = (FT_Byte)type;
pfb_lenpos = pfb_pos;
pfb_data[pfb_pos++] = 0; /* 4-byte length, fill in later */
pfb_data[pfb_pos++] = 0;
pfb_data[pfb_pos++] = 0;
pfb_data[pfb_pos++] = 0;
}
if ( pfb_pos > pfb_len || pfb_pos + rlen > pfb_len )
goto Exit2;
FT_TRACE3(( " Load POST fragment #%d (%ld byte) to buffer"
" %p + 0x%08lx\n",
i, rlen, (void*)pfb_data, pfb_pos ));
error = FT_Stream_Read( stream, (FT_Byte *)pfb_data + pfb_pos, rlen );
if ( error )
goto Exit2;
pfb_pos += rlen;
}
error = FT_ERR( Array_Too_Large );
if ( pfb_pos + 2 > pfb_len + 2 )
goto Exit2;
pfb_data[pfb_pos++] = 0x80;
pfb_data[pfb_pos++] = 3;
if ( pfb_lenpos + 3 > pfb_len + 2 )
goto Exit2;
pfb_data[pfb_lenpos ] = (FT_Byte)( len );
pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 );
pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 );
pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 );
return open_face_from_buffer( library,
pfb_data,
pfb_pos,
face_index,
"type1",
aface );
Exit2:
if ( FT_ERR_EQ( error, Array_Too_Large ) )
FT_TRACE2(( " Abort due to too-short buffer to store"
" all POST fragments\n" ));
else if ( FT_ERR_EQ( error, Invalid_Offset ) )
FT_TRACE2(( " Abort due to invalid offset in a POST fragment\n" ));
if ( error )
error = FT_ERR( Cannot_Open_Resource );
FT_FREE( pfb_data );
Exit:
return error;
}
/* The resource header says we've got resource_cnt `sfnt' */
/* (TrueType/OpenType) resources in this file. Look through */
/* them for the one indicated by face_index, load it into mem, */
/* pass it on to the truetype driver, and return it. */
/* */
static FT_Error
Mac_Read_sfnt_Resource( FT_Library library,
FT_Stream stream,
FT_Long *offsets,
FT_Long resource_cnt,
FT_Long face_index,
FT_Face *aface )
{
FT_Memory memory = library->memory;
FT_Byte* sfnt_data = NULL;
FT_Error error;
FT_ULong flag_offset;
FT_Long rlen;
int is_cff;
FT_Long face_index_in_resource = 0;
if ( face_index < 0 )
face_index = -face_index - 1;
if ( face_index >= resource_cnt )
return FT_THROW( Cannot_Open_Resource );
flag_offset = (FT_ULong)offsets[face_index];
error = FT_Stream_Seek( stream, flag_offset );
if ( error )
goto Exit;
if ( FT_READ_LONG( rlen ) )
goto Exit;
if ( rlen < 1 )
return FT_THROW( Cannot_Open_Resource );
if ( (FT_ULong)rlen > FT_MAC_RFORK_MAX_LEN )
return FT_THROW( Invalid_Offset );
error = open_face_PS_from_sfnt_stream( library,
stream,
face_index,
0, NULL,
aface );
if ( !error )
goto Exit;
/* rewind sfnt stream before open_face_PS_from_sfnt_stream() */
error = FT_Stream_Seek( stream, flag_offset + 4 );
if ( error )
goto Exit;
if ( FT_QALLOC( sfnt_data, rlen ) )
return error;
error = FT_Stream_Read( stream, (FT_Byte *)sfnt_data, (FT_ULong)rlen );
if ( error ) {
FT_FREE( sfnt_data );
goto Exit;
}
is_cff = rlen > 4 && !ft_memcmp( sfnt_data, "OTTO", 4 );
error = open_face_from_buffer( library,
sfnt_data,
(FT_ULong)rlen,
face_index_in_resource,
is_cff ? "cff" : "truetype",
aface );
Exit:
return error;
}
/* Check for a valid resource fork header, or a valid dfont */
/* header. In a resource fork the first 16 bytes are repeated */
/* at the location specified by bytes 4-7. In a dfont bytes */
/* 4-7 point to 16 bytes of zeroes instead. */
/* */
static FT_Error
IsMacResource( FT_Library library,
FT_Stream stream,
FT_Long resource_offset,
FT_Long face_index,
FT_Face *aface )
{
FT_Memory memory = library->memory;
FT_Error error;
FT_Long map_offset, rdata_pos;
FT_Long *data_offsets;
FT_Long count;
error = FT_Raccess_Get_HeaderInfo( library, stream, resource_offset,
&map_offset, &rdata_pos );
if ( error )
return error;
/* POST resources must be sorted to concatenate properly */
error = FT_Raccess_Get_DataOffsets( library, stream,
map_offset, rdata_pos,
TTAG_POST, TRUE,
&data_offsets, &count );
if ( !error )
{
error = Mac_Read_POST_Resource( library, stream, data_offsets, count,
face_index, aface );
FT_FREE( data_offsets );
/* POST exists in an LWFN providing a single face */
if ( !error )
(*aface)->num_faces = 1;
return error;
}
/* sfnt resources should not be sorted to preserve the face order by
QuickDraw API */
error = FT_Raccess_Get_DataOffsets( library, stream,
map_offset, rdata_pos,
TTAG_sfnt, FALSE,
&data_offsets, &count );
if ( !error )
{
FT_Long face_index_internal = face_index % count;
error = Mac_Read_sfnt_Resource( library, stream, data_offsets, count,
face_index_internal, aface );
FT_FREE( data_offsets );
if ( !error )
(*aface)->num_faces = count;
}
return error;
}
/* Check for a valid macbinary header, and if we find one */
/* check that the (flattened) resource fork in it is valid. */
/* */
static FT_Error
IsMacBinary( FT_Library library,
FT_Stream stream,
FT_Long face_index,
FT_Face *aface )
{
unsigned char header[128];
FT_Error error;
FT_Long dlen, offset;
if ( !stream )
return FT_THROW( Invalid_Stream_Operation );
error = FT_Stream_Seek( stream, 0 );
if ( error )
goto Exit;
error = FT_Stream_Read( stream, (FT_Byte*)header, 128 );
if ( error )
goto Exit;
if ( header[ 0] != 0 ||
header[74] != 0 ||
header[82] != 0 ||
header[ 1] == 0 ||
header[ 1] > 33 ||
header[63] != 0 ||
header[2 + header[1]] != 0 ||
header[0x53] > 0x7F )
return FT_THROW( Unknown_File_Format );
dlen = ( header[0x53] << 24 ) |
( header[0x54] << 16 ) |
( header[0x55] << 8 ) |
header[0x56];
#if 0
rlen = ( header[0x57] << 24 ) |
( header[0x58] << 16 ) |
( header[0x59] << 8 ) |
header[0x5A];
#endif /* 0 */
offset = 128 + ( ( dlen + 127 ) & ~127 );
return IsMacResource( library, stream, offset, face_index, aface );
Exit:
return error;
}
static FT_Error
load_face_in_embedded_rfork( FT_Library library,
FT_Stream stream,
FT_Long face_index,
FT_Face *aface,
const FT_Open_Args *args )
{
#undef FT_COMPONENT
#define FT_COMPONENT raccess
FT_Memory memory = library->memory;
FT_Error error = FT_ERR( Unknown_File_Format );
FT_UInt i;
char* file_names[FT_RACCESS_N_RULES];
FT_Long offsets[FT_RACCESS_N_RULES];
FT_Error errors[FT_RACCESS_N_RULES];
FT_Bool is_darwin_vfs, vfs_rfork_has_no_font = FALSE; /* not tested */
FT_Open_Args args2;
FT_Stream stream2 = NULL;
FT_Raccess_Guess( library, stream,
args->pathname, file_names, offsets, errors );
for ( i = 0; i < FT_RACCESS_N_RULES; i++ )
{
is_darwin_vfs = ft_raccess_rule_by_darwin_vfs( library, i );
if ( is_darwin_vfs && vfs_rfork_has_no_font )
{
FT_TRACE3(( "Skip rule %d: darwin vfs resource fork"
" is already checked and"
" no font is found\n",
i ));
continue;
}
if ( errors[i] )
{
FT_TRACE3(( "Error 0x%x has occurred in rule %d\n",
errors[i], i ));
continue;
}
args2.flags = FT_OPEN_PATHNAME;
args2.pathname = file_names[i] ? file_names[i] : args->pathname;
FT_TRACE3(( "Try rule %d: %s (offset=%ld) ...",
i, args2.pathname, offsets[i] ));
error = FT_Stream_New( library, &args2, &stream2 );
if ( is_darwin_vfs && FT_ERR_EQ( error, Cannot_Open_Stream ) )
vfs_rfork_has_no_font = TRUE;
if ( error )
{
FT_TRACE3(( "failed\n" ));
continue;
}
error = IsMacResource( library, stream2, offsets[i],
face_index, aface );
FT_Stream_Free( stream2, 0 );
FT_TRACE3(( "%s\n", error ? "failed": "successful" ));
if ( !error )
break;
else if ( is_darwin_vfs )
vfs_rfork_has_no_font = TRUE;
}
for (i = 0; i < FT_RACCESS_N_RULES; i++)
{
if ( file_names[i] )
FT_FREE( file_names[i] );
}
/* Caller (load_mac_face) requires FT_Err_Unknown_File_Format. */
if ( error )
error = FT_ERR( Unknown_File_Format );
return error;
#undef FT_COMPONENT
#define FT_COMPONENT objs
}
/* Check for some macintosh formats without Carbon framework. */
/* Is this a macbinary file? If so look at the resource fork. */
/* Is this a mac dfont file? */
/* Is this an old style resource fork? (in data) */
/* Else call load_face_in_embedded_rfork to try extra rules */
/* (defined in `ftrfork.c'). */
/* */
static FT_Error
load_mac_face( FT_Library library,
FT_Stream stream,
FT_Long face_index,
FT_Face *aface,
const FT_Open_Args *args )
{
FT_Error error;
FT_UNUSED( args );
error = IsMacBinary( library, stream, face_index, aface );
if ( FT_ERR_EQ( error, Unknown_File_Format ) )
{
#undef FT_COMPONENT
#define FT_COMPONENT raccess
#ifdef FT_DEBUG_LEVEL_TRACE
FT_TRACE3(( "Try as dfont: " ));
if ( !( args->flags & FT_OPEN_MEMORY ) )
FT_TRACE3(( "%s ...", args->pathname ));
#endif
error = IsMacResource( library, stream, 0, face_index, aface );
FT_TRACE3(( "%s\n", error ? "failed" : "successful" ));
#undef FT_COMPONENT
#define FT_COMPONENT objs
}
if ( ( FT_ERR_EQ( error, Unknown_File_Format ) ||
FT_ERR_EQ( error, Invalid_Stream_Operation ) ) &&
( args->flags & FT_OPEN_PATHNAME ) )
error = load_face_in_embedded_rfork( library, stream,
face_index, aface, args );
return error;
}
#endif
#endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Open_Face( FT_Library library,
const FT_Open_Args* args,
FT_Long face_index,
FT_Face *aface )
{
return ft_open_face_internal( library, args, face_index, aface, 1 );
}
static FT_Error
ft_open_face_internal( FT_Library library,
const FT_Open_Args* args,
FT_Long face_index,
FT_Face *aface,
FT_Bool test_mac_fonts )
{
FT_Error error;
FT_Driver driver = NULL;
FT_Memory memory = NULL;
FT_Stream stream = NULL;
FT_Face face = NULL;
FT_ListNode node = NULL;
FT_Bool external_stream;
FT_Module* cur;
FT_Module* limit;
#ifndef FT_CONFIG_OPTION_MAC_FONTS
FT_UNUSED( test_mac_fonts );
#endif
#ifdef FT_DEBUG_LEVEL_TRACE
FT_TRACE3(( "FT_Open_Face: " ));
if ( face_index < 0 )
FT_TRACE3(( "Requesting number of faces and named instances\n"));
else
{
FT_TRACE3(( "Requesting face %ld", face_index & 0xFFFFL ));
if ( face_index & 0x7FFF0000L )
FT_TRACE3(( ", named instance %ld", face_index >> 16 ));
FT_TRACE3(( "\n" ));
}
#endif
/* test for valid `library' delayed to `FT_Stream_New' */
if ( ( !aface && face_index >= 0 ) || !args )
return FT_THROW( Invalid_Argument );
external_stream = FT_BOOL( ( args->flags & FT_OPEN_STREAM ) &&
args->stream );
/* create input stream */
error = FT_Stream_New( library, args, &stream );
if ( error )
goto Fail3;
memory = library->memory;
/* If the font driver is specified in the `args' structure, use */
/* it. Otherwise, we scan the list of registered drivers. */
if ( ( args->flags & FT_OPEN_DRIVER ) && args->driver )
{
driver = FT_DRIVER( args->driver );
/* not all modules are drivers, so check... */
if ( FT_MODULE_IS_DRIVER( driver ) )
{
FT_Int num_params = 0;
FT_Parameter* params = NULL;
if ( args->flags & FT_OPEN_PARAMS )
{
num_params = args->num_params;
params = args->params;
}
error = open_face( driver, &stream, external_stream, face_index,
num_params, params, &face );
if ( !error )
goto Success;
}
else
error = FT_THROW( Invalid_Handle );
FT_Stream_Free( stream, external_stream );
goto Fail;
}
else
{
error = FT_ERR( Missing_Module );
/* check each font driver for an appropriate format */
cur = library->modules;
limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
{
/* not all modules are font drivers, so check... */
if ( FT_MODULE_IS_DRIVER( cur[0] ) )
{
FT_Int num_params = 0;
FT_Parameter* params = NULL;
driver = FT_DRIVER( cur[0] );
if ( args->flags & FT_OPEN_PARAMS )
{
num_params = args->num_params;
params = args->params;
}
error = open_face( driver, &stream, external_stream, face_index,
num_params, params, &face );
if ( !error )
goto Success;
#ifdef FT_CONFIG_OPTION_MAC_FONTS
if ( test_mac_fonts &&
ft_strcmp( cur[0]->clazz->module_name, "truetype" ) == 0 &&
FT_ERR_EQ( error, Table_Missing ) )
{
/* TrueType but essential tables are missing */
error = FT_Stream_Seek( stream, 0 );
if ( error )
break;
error = open_face_PS_from_sfnt_stream( library,
stream,
face_index,
num_params,
params,
aface );
if ( !error )
{
FT_Stream_Free( stream, external_stream );
return error;
}
}
#endif
if ( FT_ERR_NEQ( error, Unknown_File_Format ) )
goto Fail3;
}
}
Fail3:
/* If we are on the mac, and we get an */
/* FT_Err_Invalid_Stream_Operation it may be because we have an */
/* empty data fork, so we need to check the resource fork. */
if ( FT_ERR_NEQ( error, Cannot_Open_Stream ) &&
FT_ERR_NEQ( error, Unknown_File_Format ) &&
FT_ERR_NEQ( error, Invalid_Stream_Operation ) )
goto Fail2;
#if !defined( FT_MACINTOSH ) && defined( FT_CONFIG_OPTION_MAC_FONTS )
if ( test_mac_fonts )
{
error = load_mac_face( library, stream, face_index, aface, args );
if ( !error )
{
/* We don't want to go to Success here. We've already done */
/* that. On the other hand, if we succeeded we still need to */
/* close this stream (we opened a different stream which */
/* extracted the interesting information out of this stream */
/* here. That stream will still be open and the face will */
/* point to it). */
FT_Stream_Free( stream, external_stream );
return error;
}
}
if ( FT_ERR_NEQ( error, Unknown_File_Format ) )
goto Fail2;
#endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */
/* no driver is able to handle this format */
error = FT_THROW( Unknown_File_Format );
Fail2:
FT_Stream_Free( stream, external_stream );
goto Fail;
}
Success:
FT_TRACE4(( "FT_Open_Face: New face object, adding to list\n" ));
/* add the face object to its driver's list */
if ( FT_QNEW( node ) )
goto Fail;
node->data = face;
/* don't assume driver is the same as face->driver, so use */
/* face->driver instead. */
FT_List_Add( &face->driver->faces_list, node );
/* now allocate a glyph slot object for the face */
FT_TRACE4(( "FT_Open_Face: Creating glyph slot\n" ));
if ( face_index >= 0 )
{
error = FT_New_GlyphSlot( face, NULL );
if ( error )
goto Fail;
/* finally, allocate a size object for the face */
{
FT_Size size;
FT_TRACE4(( "FT_Open_Face: Creating size object\n" ));
error = FT_New_Size( face, &size );
if ( error )
goto Fail;
face->size = size;
}
}
/* some checks */
if ( FT_IS_SCALABLE( face ) )
{
if ( face->height < 0 )
face->height = (FT_Short)-face->height;
if ( !FT_HAS_VERTICAL( face ) )
face->max_advance_height = (FT_Short)face->height;
}
if ( FT_HAS_FIXED_SIZES( face ) )
{
FT_Int i;
for ( i = 0; i < face->num_fixed_sizes; i++ )
{
FT_Bitmap_Size* bsize = face->available_sizes + i;
if ( bsize->height < 0 )
bsize->height = -bsize->height;
if ( bsize->x_ppem < 0 )
bsize->x_ppem = -bsize->x_ppem;
if ( bsize->y_ppem < 0 )
bsize->y_ppem = -bsize->y_ppem;
/* check whether negation actually has worked */
if ( bsize->height < 0 || bsize->x_ppem < 0 || bsize->y_ppem < 0 )
{
FT_TRACE0(( "FT_Open_Face:"
" Invalid bitmap dimensions for strike %d,"
" now disabled\n", i ));
bsize->width = 0;
bsize->height = 0;
bsize->size = 0;
bsize->x_ppem = 0;
bsize->y_ppem = 0;
}
}
}
/* initialize internal face data */
{
FT_Face_Internal internal = face->internal;
internal->transform_matrix.xx = 0x10000L;
internal->transform_matrix.xy = 0;
internal->transform_matrix.yx = 0;
internal->transform_matrix.yy = 0x10000L;
internal->transform_delta.x = 0;
internal->transform_delta.y = 0;
internal->refcount = 1;
internal->no_stem_darkening = -1;
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
/* Per-face filtering can only be set up by FT_Face_Properties */
internal->lcd_filter_func = NULL;
#endif
}
if ( aface )
*aface = face;
else
FT_Done_Face( face );
goto Exit;
Fail:
if ( node )
FT_Done_Face( face ); /* face must be in the driver's list */
else if ( face )
destroy_face( memory, face, driver );
Exit:
#ifdef FT_DEBUG_LEVEL_TRACE
if ( !error && face_index < 0 )
{
FT_TRACE3(( "FT_Open_Face: The font has %ld face%s\n",
face->num_faces,
face->num_faces == 1 ? "" : "s" ));
FT_TRACE3(( " and %ld named instance%s for face %ld\n",
face->style_flags >> 16,
( face->style_flags >> 16 ) == 1 ? "" : "s",
-face_index - 1 ));
}
#endif
FT_TRACE4(( "FT_Open_Face: Return 0x%x\n", error ));
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Attach_File( FT_Face face,
const char* filepathname )
{
FT_Open_Args open;
/* test for valid `face' delayed to `FT_Attach_Stream' */
if ( !filepathname )
return FT_THROW( Invalid_Argument );
open.stream = NULL;
open.flags = FT_OPEN_PATHNAME;
open.pathname = (char*)filepathname;
return FT_Attach_Stream( face, &open );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Attach_Stream( FT_Face face,
FT_Open_Args* parameters )
{
FT_Stream stream;
FT_Error error;
FT_Driver driver;
FT_Driver_Class clazz;
/* test for valid `parameters' delayed to `FT_Stream_New' */
if ( !face )
return FT_THROW( Invalid_Face_Handle );
driver = face->driver;
if ( !driver )
return FT_THROW( Invalid_Driver_Handle );
error = FT_Stream_New( driver->root.library, parameters, &stream );
if ( error )
goto Exit;
/* we implement FT_Attach_Stream in each driver through the */
/* `attach_file' interface */
error = FT_ERR( Unimplemented_Feature );
clazz = driver->clazz;
if ( clazz->attach_file )
error = clazz->attach_file( face, stream );
/* close the attached stream */
FT_Stream_Free( stream,
FT_BOOL( parameters->stream &&
( parameters->flags & FT_OPEN_STREAM ) ) );
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Reference_Face( FT_Face face )
{
if ( !face )
return FT_THROW( Invalid_Face_Handle );
face->internal->refcount++;
return FT_Err_Ok;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_Face( FT_Face face )
{
FT_Error error;
FT_Driver driver;
FT_Memory memory;
FT_ListNode node;
error = FT_ERR( Invalid_Face_Handle );
if ( face && face->driver )
{
face->internal->refcount--;
if ( face->internal->refcount > 0 )
error = FT_Err_Ok;
else
{
driver = face->driver;
memory = driver->root.memory;
/* find face in driver's list */
node = FT_List_Find( &driver->faces_list, face );
if ( node )
{
/* remove face object from the driver's list */
FT_List_Remove( &driver->faces_list, node );
FT_FREE( node );
/* now destroy the object proper */
destroy_face( memory, face, driver );
error = FT_Err_Ok;
}
}
}
return error;
}
/* documentation is in ftobjs.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Size( FT_Face face,
FT_Size *asize )
{
FT_Error error;
FT_Memory memory;
FT_Driver driver;
FT_Driver_Class clazz;
FT_Size size = NULL;
FT_ListNode node = NULL;
FT_Size_Internal internal = NULL;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !asize )
return FT_THROW( Invalid_Argument );
if ( !face->driver )
return FT_THROW( Invalid_Driver_Handle );
*asize = NULL;
driver = face->driver;
clazz = driver->clazz;
memory = face->memory;
/* Allocate new size object and perform basic initialisation */
if ( FT_ALLOC( size, clazz->size_object_size ) || FT_QNEW( node ) )
goto Exit;
size->face = face;
if ( FT_NEW( internal ) )
goto Exit;
size->internal = internal;
if ( clazz->init_size )
error = clazz->init_size( size );
/* in case of success, add to the face's list */
if ( !error )
{
*asize = size;
node->data = size;
FT_List_Add( &face->sizes_list, node );
}
Exit:
if ( error )
{
FT_FREE( node );
if ( size )
FT_FREE( size->internal );
FT_FREE( size );
}
return error;
}
/* documentation is in ftobjs.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_Size( FT_Size size )
{
FT_Error error;
FT_Driver driver;
FT_Memory memory;
FT_Face face;
FT_ListNode node;
if ( !size )
return FT_THROW( Invalid_Size_Handle );
face = size->face;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
driver = face->driver;
if ( !driver )
return FT_THROW( Invalid_Driver_Handle );
memory = driver->root.memory;
error = FT_Err_Ok;
node = FT_List_Find( &face->sizes_list, size );
if ( node )
{
FT_List_Remove( &face->sizes_list, node );
FT_FREE( node );
if ( face->size == size )
{
face->size = NULL;
if ( face->sizes_list.head )
face->size = (FT_Size)(face->sizes_list.head->data);
}
destroy_size( memory, size, driver );
}
else
error = FT_THROW( Invalid_Size_Handle );
return error;
}
/* documentation is in ftobjs.h */
FT_BASE_DEF( FT_Error )
FT_Match_Size( FT_Face face,
FT_Size_Request req,
FT_Bool ignore_width,
FT_ULong* size_index )
{
FT_Int i;
FT_Long w, h;
if ( !FT_HAS_FIXED_SIZES( face ) )
return FT_THROW( Invalid_Face_Handle );
/* FT_Bitmap_Size doesn't provide enough info... */
if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL )
return FT_THROW( Unimplemented_Feature );
w = FT_REQUEST_WIDTH ( req );
h = FT_REQUEST_HEIGHT( req );
if ( req->width && !req->height )
h = w;
else if ( !req->width && req->height )
w = h;
w = FT_PIX_ROUND( w );
h = FT_PIX_ROUND( h );
if ( !w || !h )
return FT_THROW( Invalid_Pixel_Size );
for ( i = 0; i < face->num_fixed_sizes; i++ )
{
FT_Bitmap_Size* bsize = face->available_sizes + i;
if ( h != FT_PIX_ROUND( bsize->y_ppem ) )
continue;
if ( w == FT_PIX_ROUND( bsize->x_ppem ) || ignore_width )
{
FT_TRACE3(( "FT_Match_Size: bitmap strike %d matches\n", i ));
if ( size_index )
*size_index = (FT_ULong)i;
return FT_Err_Ok;
}
}
FT_TRACE3(( "FT_Match_Size: no matching bitmap strike\n" ));
return FT_THROW( Invalid_Pixel_Size );
}
/* documentation is in ftobjs.h */
FT_BASE_DEF( void )
ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics,
FT_Pos advance )
{
FT_Pos height = metrics->height;
/* compensate for glyph with bbox above/below the baseline */
if ( metrics->horiBearingY < 0 )
{
if ( height < metrics->horiBearingY )
height = metrics->horiBearingY;
}
else if ( metrics->horiBearingY > 0 )
height -= metrics->horiBearingY;
/* the factor 1.2 is a heuristical value */
if ( !advance )
advance = height * 12 / 10;
metrics->vertBearingX = metrics->horiBearingX - metrics->horiAdvance / 2;
metrics->vertBearingY = ( advance - height ) / 2;
metrics->vertAdvance = advance;
}
static void
ft_recompute_scaled_metrics( FT_Face face,
FT_Size_Metrics* metrics )
{
/* Compute root ascender, descender, test height, and max_advance */
#ifdef GRID_FIT_METRICS
metrics->ascender = FT_PIX_CEIL( FT_MulFix( face->ascender,
metrics->y_scale ) );
metrics->descender = FT_PIX_FLOOR( FT_MulFix( face->descender,
metrics->y_scale ) );
metrics->height = FT_PIX_ROUND( FT_MulFix( face->height,
metrics->y_scale ) );
metrics->max_advance = FT_PIX_ROUND( FT_MulFix( face->max_advance_width,
metrics->x_scale ) );
#else /* !GRID_FIT_METRICS */
metrics->ascender = FT_MulFix( face->ascender,
metrics->y_scale );
metrics->descender = FT_MulFix( face->descender,
metrics->y_scale );
metrics->height = FT_MulFix( face->height,
metrics->y_scale );
metrics->max_advance = FT_MulFix( face->max_advance_width,
metrics->x_scale );
#endif /* !GRID_FIT_METRICS */
}
FT_BASE_DEF( void )
FT_Select_Metrics( FT_Face face,
FT_ULong strike_index )
{
FT_Size_Metrics* metrics;
FT_Bitmap_Size* bsize;
metrics = &face->size->metrics;
bsize = face->available_sizes + strike_index;
metrics->x_ppem = (FT_UShort)( ( bsize->x_ppem + 32 ) >> 6 );
metrics->y_ppem = (FT_UShort)( ( bsize->y_ppem + 32 ) >> 6 );
if ( FT_IS_SCALABLE( face ) )
{
metrics->x_scale = FT_DivFix( bsize->x_ppem,
face->units_per_EM );
metrics->y_scale = FT_DivFix( bsize->y_ppem,
face->units_per_EM );
ft_recompute_scaled_metrics( face, metrics );
}
else
{
metrics->x_scale = 1L << 16;
metrics->y_scale = 1L << 16;
metrics->ascender = bsize->y_ppem;
metrics->descender = 0;
metrics->height = bsize->height << 6;
metrics->max_advance = bsize->x_ppem;
}
}
FT_BASE_DEF( FT_Error )
FT_Request_Metrics( FT_Face face,
FT_Size_Request req )
{
FT_Error error = FT_Err_Ok;
FT_Size_Metrics* metrics;
metrics = &face->size->metrics;
if ( FT_IS_SCALABLE( face ) )
{
FT_Long w = 0, h = 0, scaled_w = 0, scaled_h = 0;
switch ( req->type )
{
case FT_SIZE_REQUEST_TYPE_NOMINAL:
w = h = face->units_per_EM;
break;
case FT_SIZE_REQUEST_TYPE_REAL_DIM:
w = h = face->ascender - face->descender;
break;
case FT_SIZE_REQUEST_TYPE_BBOX:
w = face->bbox.xMax - face->bbox.xMin;
h = face->bbox.yMax - face->bbox.yMin;
break;
case FT_SIZE_REQUEST_TYPE_CELL:
w = face->max_advance_width;
h = face->ascender - face->descender;
break;
case FT_SIZE_REQUEST_TYPE_SCALES:
metrics->x_scale = (FT_Fixed)req->width;
metrics->y_scale = (FT_Fixed)req->height;
if ( !metrics->x_scale )
metrics->x_scale = metrics->y_scale;
else if ( !metrics->y_scale )
metrics->y_scale = metrics->x_scale;
goto Calculate_Ppem;
case FT_SIZE_REQUEST_TYPE_MAX:
break;
}
/* to be on the safe side */
if ( w < 0 )
w = -w;
if ( h < 0 )
h = -h;
scaled_w = FT_REQUEST_WIDTH ( req );
scaled_h = FT_REQUEST_HEIGHT( req );
/* determine scales */
if ( req->width )
{
metrics->x_scale = FT_DivFix( scaled_w, w );
if ( req->height )
{
metrics->y_scale = FT_DivFix( scaled_h, h );
if ( req->type == FT_SIZE_REQUEST_TYPE_CELL )
{
if ( metrics->y_scale > metrics->x_scale )
metrics->y_scale = metrics->x_scale;
else
metrics->x_scale = metrics->y_scale;
}
}
else
{
metrics->y_scale = metrics->x_scale;
scaled_h = FT_MulDiv( scaled_w, h, w );
}
}
else
{
metrics->x_scale = metrics->y_scale = FT_DivFix( scaled_h, h );
scaled_w = FT_MulDiv( scaled_h, w, h );
}
Calculate_Ppem:
/* calculate the ppems */
if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL )
{
scaled_w = FT_MulFix( face->units_per_EM, metrics->x_scale );
scaled_h = FT_MulFix( face->units_per_EM, metrics->y_scale );
}
scaled_w = ( scaled_w + 32 ) >> 6;
scaled_h = ( scaled_h + 32 ) >> 6;
if ( scaled_w > (FT_Long)FT_USHORT_MAX ||
scaled_h > (FT_Long)FT_USHORT_MAX )
{
FT_ERROR(( "FT_Request_Metrics: Resulting ppem size too large\n" ));
error = FT_ERR( Invalid_Pixel_Size );
goto Exit;
}
metrics->x_ppem = (FT_UShort)scaled_w;
metrics->y_ppem = (FT_UShort)scaled_h;
ft_recompute_scaled_metrics( face, metrics );
}
else
{
FT_ZERO( metrics );
metrics->x_scale = 1L << 16;
metrics->y_scale = 1L << 16;
}
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Select_Size( FT_Face face,
FT_Int strike_index )
{
FT_Error error = FT_Err_Ok;
FT_Driver_Class clazz;
if ( !face || !FT_HAS_FIXED_SIZES( face ) )
return FT_THROW( Invalid_Face_Handle );
if ( strike_index < 0 || strike_index >= face->num_fixed_sizes )
return FT_THROW( Invalid_Argument );
clazz = face->driver->clazz;
if ( clazz->select_size )
{
error = clazz->select_size( face->size, (FT_ULong)strike_index );
FT_TRACE5(( "FT_Select_Size (%s driver):\n",
face->driver->root.clazz->module_name ));
}
else
{
FT_Select_Metrics( face, (FT_ULong)strike_index );
FT_TRACE5(( "FT_Select_Size:\n" ));
}
#ifdef FT_DEBUG_LEVEL_TRACE
{
FT_Size_Metrics* metrics = &face->size->metrics;
FT_TRACE5(( " x scale: %ld (%f)\n",
metrics->x_scale, metrics->x_scale / 65536.0 ));
FT_TRACE5(( " y scale: %ld (%f)\n",
metrics->y_scale, metrics->y_scale / 65536.0 ));
FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 ));
FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 ));
FT_TRACE5(( " height: %f\n", metrics->height / 64.0 ));
FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 ));
FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem ));
FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem ));
}
#endif
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Request_Size( FT_Face face,
FT_Size_Request req )
{
FT_Error error;
FT_Driver_Class clazz;
FT_ULong strike_index;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !req || req->width < 0 || req->height < 0 ||
req->type >= FT_SIZE_REQUEST_TYPE_MAX )
return FT_THROW( Invalid_Argument );
/* signal the auto-hinter to recompute its size metrics */
/* (if requested) */
face->size->internal->autohint_metrics.x_scale = 0;
clazz = face->driver->clazz;
if ( clazz->request_size )
{
error = clazz->request_size( face->size, req );
FT_TRACE5(( "FT_Request_Size (%s driver):\n",
face->driver->root.clazz->module_name ));
}
else if ( !FT_IS_SCALABLE( face ) && FT_HAS_FIXED_SIZES( face ) )
{
/*
* The reason that a driver doesn't have `request_size' defined is
* either that the scaling here suffices or that the supported formats
* are bitmap-only and size matching is not implemented.
*
* In the latter case, a simple size matching is done.
*/
error = FT_Match_Size( face, req, 0, &strike_index );
if ( error )
goto Exit;
return FT_Select_Size( face, (FT_Int)strike_index );
}
else
{
error = FT_Request_Metrics( face, req );
if ( error )
goto Exit;
FT_TRACE5(( "FT_Request_Size:\n" ));
}
#ifdef FT_DEBUG_LEVEL_TRACE
{
FT_Size_Metrics* metrics = &face->size->metrics;
FT_TRACE5(( " x scale: %ld (%f)\n",
metrics->x_scale, metrics->x_scale / 65536.0 ));
FT_TRACE5(( " y scale: %ld (%f)\n",
metrics->y_scale, metrics->y_scale / 65536.0 ));
FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 ));
FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 ));
FT_TRACE5(( " height: %f\n", metrics->height / 64.0 ));
FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 ));
FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem ));
FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem ));
}
#endif
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Char_Size( FT_Face face,
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
FT_Size_RequestRec req;
/* check of `face' delayed to `FT_Request_Size' */
if ( !char_width )
char_width = char_height;
else if ( !char_height )
char_height = char_width;
if ( !horz_resolution )
horz_resolution = vert_resolution;
else if ( !vert_resolution )
vert_resolution = horz_resolution;
if ( char_width < 1 * 64 )
char_width = 1 * 64;
if ( char_height < 1 * 64 )
char_height = 1 * 64;
if ( !horz_resolution )
horz_resolution = vert_resolution = 72;
req.type = FT_SIZE_REQUEST_TYPE_NOMINAL;
req.width = char_width;
req.height = char_height;
req.horiResolution = horz_resolution;
req.vertResolution = vert_resolution;
return FT_Request_Size( face, &req );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Pixel_Sizes( FT_Face face,
FT_UInt pixel_width,
FT_UInt pixel_height )
{
FT_Size_RequestRec req;
/* check of `face' delayed to `FT_Request_Size' */
if ( pixel_width == 0 )
pixel_width = pixel_height;
else if ( pixel_height == 0 )
pixel_height = pixel_width;
if ( pixel_width < 1 )
pixel_width = 1;
if ( pixel_height < 1 )
pixel_height = 1;
/* use `>=' to avoid potential compiler warning on 16bit platforms */
if ( pixel_width >= 0xFFFFU )
pixel_width = 0xFFFFU;
if ( pixel_height >= 0xFFFFU )
pixel_height = 0xFFFFU;
req.type = FT_SIZE_REQUEST_TYPE_NOMINAL;
req.width = (FT_Long)( pixel_width << 6 );
req.height = (FT_Long)( pixel_height << 6 );
req.horiResolution = 0;
req.vertResolution = 0;
return FT_Request_Size( face, &req );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Get_Kerning( FT_Face face,
FT_UInt left_glyph,
FT_UInt right_glyph,
FT_UInt kern_mode,
FT_Vector *akerning )
{
FT_Error error = FT_Err_Ok;
FT_Driver driver;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !akerning )
return FT_THROW( Invalid_Argument );
driver = face->driver;
akerning->x = 0;
akerning->y = 0;
if ( driver->clazz->get_kerning )
{
error = driver->clazz->get_kerning( face,
left_glyph,
right_glyph,
akerning );
if ( !error )
{
if ( kern_mode != FT_KERNING_UNSCALED )
{
akerning->x = FT_MulFix( akerning->x, face->size->metrics.x_scale );
akerning->y = FT_MulFix( akerning->y, face->size->metrics.y_scale );
if ( kern_mode != FT_KERNING_UNFITTED )
{
FT_Pos orig_x = akerning->x;
FT_Pos orig_y = akerning->y;
/* we scale down kerning values for small ppem values */
/* to avoid that rounding makes them too big. */
/* `25' has been determined heuristically. */
if ( face->size->metrics.x_ppem < 25 )
akerning->x = FT_MulDiv( orig_x,
face->size->metrics.x_ppem, 25 );
if ( face->size->metrics.y_ppem < 25 )
akerning->y = FT_MulDiv( orig_y,
face->size->metrics.y_ppem, 25 );
akerning->x = FT_PIX_ROUND( akerning->x );
akerning->y = FT_PIX_ROUND( akerning->y );
#ifdef FT_DEBUG_LEVEL_TRACE
{
FT_Pos orig_x_rounded = FT_PIX_ROUND( orig_x );
FT_Pos orig_y_rounded = FT_PIX_ROUND( orig_y );
if ( akerning->x != orig_x_rounded ||
akerning->y != orig_y_rounded )
FT_TRACE5(( "FT_Get_Kerning: horizontal kerning"
" (%ld, %ld) scaled down to (%ld, %ld) pixels\n",
orig_x_rounded / 64, orig_y_rounded / 64,
akerning->x / 64, akerning->y / 64 ));
}
#endif
}
}
}
}
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Get_Track_Kerning( FT_Face face,
FT_Fixed point_size,
FT_Int degree,
FT_Fixed* akerning )
{
FT_Service_Kerning service;
FT_Error error = FT_Err_Ok;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !akerning )
return FT_THROW( Invalid_Argument );
FT_FACE_FIND_SERVICE( face, service, KERNING );
if ( !service )
return FT_THROW( Unimplemented_Feature );
error = service->get_track( face,
point_size,
degree,
akerning );
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Select_Charmap( FT_Face face,
FT_Encoding encoding )
{
FT_CharMap* cur;
FT_CharMap* limit;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
/* FT_ENCODING_NONE is a valid encoding for BDF, PCF, and Windows FNT */
if ( encoding == FT_ENCODING_NONE && !face->num_charmaps )
return FT_THROW( Invalid_Argument );
/* FT_ENCODING_UNICODE is special. We try to find the `best' Unicode */
/* charmap available, i.e., one with UCS-4 characters, if possible. */
/* */
/* This is done by find_unicode_charmap() above, to share code. */
if ( encoding == FT_ENCODING_UNICODE )
return find_unicode_charmap( face );
cur = face->charmaps;
if ( !cur )
return FT_THROW( Invalid_CharMap_Handle );
limit = cur + face->num_charmaps;
for ( ; cur < limit; cur++ )
{
if ( cur[0]->encoding == encoding )
{
face->charmap = cur[0];
return FT_Err_Ok;
}
}
return FT_THROW( Invalid_Argument );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Charmap( FT_Face face,
FT_CharMap charmap )
{
FT_CharMap* cur;
FT_CharMap* limit;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
cur = face->charmaps;
if ( !cur || !charmap )
return FT_THROW( Invalid_CharMap_Handle );
limit = cur + face->num_charmaps;
for ( ; cur < limit; cur++ )
{
if ( cur[0] == charmap &&
FT_Get_CMap_Format ( charmap ) != 14 )
{
face->charmap = cur[0];
return FT_Err_Ok;
}
}
return FT_THROW( Invalid_Argument );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Int )
FT_Get_Charmap_Index( FT_CharMap charmap )
{
FT_Int i;
if ( !charmap || !charmap->face )
return -1;
for ( i = 0; i < charmap->face->num_charmaps; i++ )
if ( charmap->face->charmaps[i] == charmap )
break;
FT_ASSERT( i < charmap->face->num_charmaps );
return i;
}
static void
ft_cmap_done_internal( FT_CMap cmap )
{
FT_CMap_Class clazz = cmap->clazz;
FT_Face face = cmap->charmap.face;
FT_Memory memory = FT_FACE_MEMORY( face );
if ( clazz->done )
clazz->done( cmap );
FT_FREE( cmap );
}
FT_BASE_DEF( void )
FT_CMap_Done( FT_CMap cmap )
{
if ( cmap )
{
FT_Face face = cmap->charmap.face;
FT_Memory memory = FT_FACE_MEMORY( face );
FT_Error error;
FT_Int i, j;
for ( i = 0; i < face->num_charmaps; i++ )
{
if ( (FT_CMap)face->charmaps[i] == cmap )
{
FT_CharMap last_charmap = face->charmaps[face->num_charmaps - 1];
if ( FT_QRENEW_ARRAY( face->charmaps,
face->num_charmaps,
face->num_charmaps - 1 ) )
return;
/* remove it from our list of charmaps */
for ( j = i + 1; j < face->num_charmaps; j++ )
{
if ( j == face->num_charmaps - 1 )
face->charmaps[j - 1] = last_charmap;
else
face->charmaps[j - 1] = face->charmaps[j];
}
face->num_charmaps--;
if ( (FT_CMap)face->charmap == cmap )
face->charmap = NULL;
ft_cmap_done_internal( cmap );
break;
}
}
}
}
FT_BASE_DEF( FT_Error )
FT_CMap_New( FT_CMap_Class clazz,
FT_Pointer init_data,
FT_CharMap charmap,
FT_CMap *acmap )
{
FT_Error error;
FT_Face face;
FT_Memory memory;
FT_CMap cmap = NULL;
if ( !clazz || !charmap || !charmap->face )
return FT_THROW( Invalid_Argument );
face = charmap->face;
memory = FT_FACE_MEMORY( face );
if ( !FT_ALLOC( cmap, clazz->size ) )
{
cmap->charmap = *charmap;
cmap->clazz = clazz;
if ( clazz->init )
{
error = clazz->init( cmap, init_data );
if ( error )
goto Fail;
}
/* add it to our list of charmaps */
if ( FT_QRENEW_ARRAY( face->charmaps,
face->num_charmaps,
face->num_charmaps + 1 ) )
goto Fail;
face->charmaps[face->num_charmaps++] = (FT_CharMap)cmap;
}
Exit:
if ( acmap )
*acmap = cmap;
return error;
Fail:
ft_cmap_done_internal( cmap );
cmap = NULL;
goto Exit;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt )
FT_Get_Char_Index( FT_Face face,
FT_ULong charcode )
{
FT_UInt result = 0;
if ( face && face->charmap )
{
FT_CMap cmap = FT_CMAP( face->charmap );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large charcode" ));
FT_TRACE1(( " 0x%lx is truncated\n", charcode ));
}
result = cmap->clazz->char_index( cmap, (FT_UInt32)charcode );
if ( result >= (FT_UInt)face->num_glyphs )
result = 0;
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_ULong )
FT_Get_First_Char( FT_Face face,
FT_UInt *agindex )
{
FT_ULong result = 0;
FT_UInt gindex = 0;
/* only do something if we have a charmap, and we have glyphs at all */
if ( face && face->charmap && face->num_glyphs )
{
gindex = FT_Get_Char_Index( face, 0 );
if ( gindex == 0 )
result = FT_Get_Next_Char( face, 0, &gindex );
}
if ( agindex )
*agindex = gindex;
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_ULong )
FT_Get_Next_Char( FT_Face face,
FT_ULong charcode,
FT_UInt *agindex )
{
FT_ULong result = 0;
FT_UInt gindex = 0;
if ( face && face->charmap && face->num_glyphs )
{
FT_UInt32 code = (FT_UInt32)charcode;
FT_CMap cmap = FT_CMAP( face->charmap );
do
{
gindex = cmap->clazz->char_next( cmap, &code );
} while ( gindex >= (FT_UInt)face->num_glyphs );
result = ( gindex == 0 ) ? 0 : code;
}
if ( agindex )
*agindex = gindex;
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Face_Properties( FT_Face face,
FT_UInt num_properties,
FT_Parameter* properties )
{
FT_Error error = FT_Err_Ok;
if ( num_properties > 0 && !properties )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
for ( ; num_properties > 0; num_properties-- )
{
if ( properties->tag == FT_PARAM_TAG_STEM_DARKENING )
{
if ( properties->data )
{
if ( *( (FT_Bool*)properties->data ) == TRUE )
face->internal->no_stem_darkening = FALSE;
else
face->internal->no_stem_darkening = TRUE;
}
else
{
/* use module default */
face->internal->no_stem_darkening = -1;
}
}
else if ( properties->tag == FT_PARAM_TAG_LCD_FILTER_WEIGHTS )
{
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
if ( properties->data )
{
ft_memcpy( face->internal->lcd_weights,
properties->data,
FT_LCD_FILTER_FIVE_TAPS );
face->internal->lcd_filter_func = ft_lcd_filter_fir;
}
#else
error = FT_THROW( Unimplemented_Feature );
goto Exit;
#endif
}
else if ( properties->tag == FT_PARAM_TAG_RANDOM_SEED )
{
if ( properties->data )
{
face->internal->random_seed = *( (FT_Int32*)properties->data );
if ( face->internal->random_seed < 0 )
face->internal->random_seed = 0;
}
else
{
/* use module default */
face->internal->random_seed = -1;
}
}
else
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
if ( error )
break;
properties++;
}
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt )
FT_Face_GetCharVariantIndex( FT_Face face,
FT_ULong charcode,
FT_ULong variantSelector )
{
FT_UInt result = 0;
if ( face &&
face->charmap &&
face->charmap->encoding == FT_ENCODING_UNICODE )
{
FT_CharMap charmap = find_variant_selector_charmap( face );
FT_CMap ucmap = FT_CMAP( face->charmap );
if ( charmap )
{
FT_CMap vcmap = FT_CMAP( charmap );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Face_GetCharVariantIndex:"
" too large charcode" ));
FT_TRACE1(( " 0x%lx is truncated\n", charcode ));
}
if ( variantSelector > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Face_GetCharVariantIndex:"
" too large variantSelector" ));
FT_TRACE1(( " 0x%lx is truncated\n", variantSelector ));
}
result = vcmap->clazz->char_var_index( vcmap, ucmap,
(FT_UInt32)charcode,
(FT_UInt32)variantSelector );
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Int )
FT_Face_GetCharVariantIsDefault( FT_Face face,
FT_ULong charcode,
FT_ULong variantSelector )
{
FT_Int result = -1;
if ( face )
{
FT_CharMap charmap = find_variant_selector_charmap( face );
if ( charmap )
{
FT_CMap vcmap = FT_CMAP( charmap );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Face_GetCharVariantIsDefault:"
" too large charcode" ));
FT_TRACE1(( " 0x%lx is truncated\n", charcode ));
}
if ( variantSelector > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Face_GetCharVariantIsDefault:"
" too large variantSelector" ));
FT_TRACE1(( " 0x%lx is truncated\n", variantSelector ));
}
result = vcmap->clazz->char_var_default( vcmap,
(FT_UInt32)charcode,
(FT_UInt32)variantSelector );
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt32* )
FT_Face_GetVariantSelectors( FT_Face face )
{
FT_UInt32 *result = NULL;
if ( face )
{
FT_CharMap charmap = find_variant_selector_charmap( face );
if ( charmap )
{
FT_CMap vcmap = FT_CMAP( charmap );
FT_Memory memory = FT_FACE_MEMORY( face );
result = vcmap->clazz->variant_list( vcmap, memory );
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt32* )
FT_Face_GetVariantsOfChar( FT_Face face,
FT_ULong charcode )
{
FT_UInt32 *result = NULL;
if ( face )
{
FT_CharMap charmap = find_variant_selector_charmap( face );
if ( charmap )
{
FT_CMap vcmap = FT_CMAP( charmap );
FT_Memory memory = FT_FACE_MEMORY( face );
if ( charcode > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Face_GetVariantsOfChar: too large charcode" ));
FT_TRACE1(( " 0x%lx is truncated\n", charcode ));
}
result = vcmap->clazz->charvariant_list( vcmap, memory,
(FT_UInt32)charcode );
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt32* )
FT_Face_GetCharsOfVariant( FT_Face face,
FT_ULong variantSelector )
{
FT_UInt32 *result = NULL;
if ( face )
{
FT_CharMap charmap = find_variant_selector_charmap( face );
if ( charmap )
{
FT_CMap vcmap = FT_CMAP( charmap );
FT_Memory memory = FT_FACE_MEMORY( face );
if ( variantSelector > 0xFFFFFFFFUL )
{
FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" ));
FT_TRACE1(( " 0x%lx is truncated\n", variantSelector ));
}
result = vcmap->clazz->variantchar_list( vcmap, memory,
(FT_UInt32)variantSelector );
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt )
FT_Get_Name_Index( FT_Face face,
const FT_String* glyph_name )
{
FT_UInt result = 0;
if ( face &&
FT_HAS_GLYPH_NAMES( face ) &&
glyph_name )
{
FT_Service_GlyphDict service;
FT_FACE_LOOKUP_SERVICE( face,
service,
GLYPH_DICT );
if ( service && service->name_index )
result = service->name_index( face, glyph_name );
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Get_Glyph_Name( FT_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
FT_Error error;
FT_Service_GlyphDict service;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !buffer || buffer_max == 0 )
return FT_THROW( Invalid_Argument );
/* clean up buffer */
((FT_Byte*)buffer)[0] = '\0';
if ( (FT_Long)glyph_index >= face->num_glyphs )
return FT_THROW( Invalid_Glyph_Index );
if ( !FT_HAS_GLYPH_NAMES( face ) )
return FT_THROW( Invalid_Argument );
FT_FACE_LOOKUP_SERVICE( face, service, GLYPH_DICT );
if ( service && service->get_name )
error = service->get_name( face, glyph_index, buffer, buffer_max );
else
error = FT_THROW( Invalid_Argument );
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( const char* )
FT_Get_Postscript_Name( FT_Face face )
{
const char* result = NULL;
if ( !face )
goto Exit;
if ( !result )
{
FT_Service_PsFontName service;
FT_FACE_LOOKUP_SERVICE( face,
service,
POSTSCRIPT_FONT_NAME );
if ( service && service->get_ps_font_name )
result = service->get_ps_font_name( face );
}
Exit:
return result;
}
/* documentation is in tttables.h */
FT_EXPORT_DEF( void* )
FT_Get_Sfnt_Table( FT_Face face,
FT_Sfnt_Tag tag )
{
void* table = NULL;
FT_Service_SFNT_Table service;
if ( face && FT_IS_SFNT( face ) )
{
FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE );
if ( service )
table = service->get_table( face, tag );
}
return table;
}
/* documentation is in tttables.h */
FT_EXPORT_DEF( FT_Error )
FT_Load_Sfnt_Table( FT_Face face,
FT_ULong tag,
FT_Long offset,
FT_Byte* buffer,
FT_ULong* length )
{
FT_Service_SFNT_Table service;
if ( !face || !FT_IS_SFNT( face ) )
return FT_THROW( Invalid_Face_Handle );
FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE );
if ( !service )
return FT_THROW( Unimplemented_Feature );
return service->load_table( face, tag, offset, buffer, length );
}
/* documentation is in tttables.h */
FT_EXPORT_DEF( FT_Error )
FT_Sfnt_Table_Info( FT_Face face,
FT_UInt table_index,
FT_ULong *tag,
FT_ULong *length )
{
FT_Service_SFNT_Table service;
FT_ULong offset;
/* test for valid `length' delayed to `service->table_info' */
if ( !face || !FT_IS_SFNT( face ) )
return FT_THROW( Invalid_Face_Handle );
FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE );
if ( !service )
return FT_THROW( Unimplemented_Feature );
return service->table_info( face, table_index, tag, &offset, length );
}
/* documentation is in tttables.h */
FT_EXPORT_DEF( FT_ULong )
FT_Get_CMap_Language_ID( FT_CharMap charmap )
{
FT_Service_TTCMaps service;
FT_Face face;
TT_CMapInfo cmap_info;
if ( !charmap || !charmap->face )
return 0;
face = charmap->face;
FT_FACE_FIND_SERVICE( face, service, TT_CMAP );
if ( !service )
return 0;
if ( service->get_cmap_info( charmap, &cmap_info ))
return 0;
return cmap_info.language;
}
/* documentation is in tttables.h */
FT_EXPORT_DEF( FT_Long )
FT_Get_CMap_Format( FT_CharMap charmap )
{
FT_Service_TTCMaps service;
FT_Face face;
TT_CMapInfo cmap_info;
if ( !charmap || !charmap->face )
return -1;
face = charmap->face;
FT_FACE_FIND_SERVICE( face, service, TT_CMAP );
if ( !service )
return -1;
if ( service->get_cmap_info( charmap, &cmap_info ))
return -1;
return cmap_info.format;
}
/* documentation is in ftsizes.h */
FT_EXPORT_DEF( FT_Error )
FT_Activate_Size( FT_Size size )
{
FT_Face face;
if ( !size )
return FT_THROW( Invalid_Size_Handle );
face = size->face;
if ( !face || !face->driver )
return FT_THROW( Invalid_Face_Handle );
/* we don't need anything more complex than that; all size objects */
/* are already listed by the face */
face->size = size;
return FT_Err_Ok;
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** R E N D E R E R S ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* lookup a renderer by glyph format in the library's list */
FT_BASE_DEF( FT_Renderer )
FT_Lookup_Renderer( FT_Library library,
FT_Glyph_Format format,
FT_ListNode* node )
{
FT_ListNode cur;
FT_Renderer result = NULL;
if ( !library )
goto Exit;
cur = library->renderers.head;
if ( node )
{
if ( *node )
cur = (*node)->next;
*node = NULL;
}
while ( cur )
{
FT_Renderer renderer = FT_RENDERER( cur->data );
if ( renderer->glyph_format == format )
{
if ( node )
*node = cur;
result = renderer;
break;
}
cur = cur->next;
}
Exit:
return result;
}
static FT_Renderer
ft_lookup_glyph_renderer( FT_GlyphSlot slot )
{
FT_Face face = slot->face;
FT_Library library = FT_FACE_LIBRARY( face );
FT_Renderer result = library->cur_renderer;
if ( !result || result->glyph_format != slot->format )
result = FT_Lookup_Renderer( library, slot->format, 0 );
return result;
}
static void
ft_set_current_renderer( FT_Library library )
{
FT_Renderer renderer;
renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE, 0 );
library->cur_renderer = renderer;
}
static FT_Error
ft_add_renderer( FT_Module module )
{
FT_Library library = module->library;
FT_Memory memory = library->memory;
FT_Error error;
FT_ListNode node = NULL;
if ( FT_QNEW( node ) )
goto Exit;
{
FT_Renderer render = FT_RENDERER( module );
FT_Renderer_Class* clazz = (FT_Renderer_Class*)module->clazz;
render->clazz = clazz;
render->glyph_format = clazz->glyph_format;
/* allocate raster object if needed */
if ( clazz->raster_class && clazz->raster_class->raster_new )
{
error = clazz->raster_class->raster_new( memory, &render->raster );
if ( error )
goto Fail;
render->raster_render = clazz->raster_class->raster_render;
render->render = clazz->render_glyph;
}
#ifdef FT_CONFIG_OPTION_SVG
if ( clazz->glyph_format == FT_GLYPH_FORMAT_SVG )
render->render = clazz->render_glyph;
#endif
/* add to list */
node->data = module;
FT_List_Add( &library->renderers, node );
ft_set_current_renderer( library );
}
Fail:
if ( error )
FT_FREE( node );
Exit:
return error;
}
static void
ft_remove_renderer( FT_Module module )
{
FT_Library library;
FT_Memory memory;
FT_ListNode node;
library = module->library;
if ( !library )
return;
memory = library->memory;
node = FT_List_Find( &library->renderers, module );
if ( node )
{
FT_Renderer render = FT_RENDERER( module );
/* release raster object, if any */
if ( render->raster )
render->clazz->raster_class->raster_done( render->raster );
/* remove from list */
FT_List_Remove( &library->renderers, node );
FT_FREE( node );
ft_set_current_renderer( library );
}
}
/* documentation is in ftrender.h */
FT_EXPORT_DEF( FT_Renderer )
FT_Get_Renderer( FT_Library library,
FT_Glyph_Format format )
{
/* test for valid `library' delayed to `FT_Lookup_Renderer' */
return FT_Lookup_Renderer( library, format, 0 );
}
/* documentation is in ftrender.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Renderer( FT_Library library,
FT_Renderer renderer,
FT_UInt num_params,
FT_Parameter* parameters )
{
FT_ListNode node;
FT_Error error = FT_Err_Ok;
FT_Renderer_SetModeFunc set_mode;
if ( !library )
{
error = FT_THROW( Invalid_Library_Handle );
goto Exit;
}
if ( !renderer )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
if ( num_params > 0 && !parameters )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
node = FT_List_Find( &library->renderers, renderer );
if ( !node )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
FT_List_Up( &library->renderers, node );
if ( renderer->glyph_format == FT_GLYPH_FORMAT_OUTLINE )
library->cur_renderer = renderer;
set_mode = renderer->clazz->set_mode;
for ( ; num_params > 0; num_params-- )
{
error = set_mode( renderer, parameters->tag, parameters->data );
if ( error )
break;
parameters++;
}
Exit:
return error;
}
FT_BASE_DEF( FT_Error )
FT_Render_Glyph_Internal( FT_Library library,
FT_GlyphSlot slot,
FT_Render_Mode render_mode )
{
FT_Error error = FT_Err_Ok;
FT_Face face = slot->face;
FT_Renderer renderer;
switch ( slot->format )
{
default:
if ( slot->internal->load_flags & FT_LOAD_COLOR )
{
FT_LayerIterator iterator;
FT_UInt base_glyph = slot->glyph_index;
FT_Bool have_layers;
FT_UInt glyph_index;
FT_UInt color_index;
/* check whether we have colored glyph layers */
iterator.p = NULL;
have_layers = FT_Get_Color_Glyph_Layer( face,
base_glyph,
&glyph_index,
&color_index,
&iterator );
if ( have_layers )
{
error = FT_New_GlyphSlot( face, NULL );
if ( !error )
{
TT_Face ttface = (TT_Face)face;
SFNT_Service sfnt = (SFNT_Service)ttface->sfnt;
do
{
FT_Int32 load_flags = slot->internal->load_flags;
/* disable the `FT_LOAD_COLOR' flag to avoid recursion */
/* right here in this function */
load_flags &= ~FT_LOAD_COLOR;
/* render into the new `face->glyph' glyph slot */
load_flags |= FT_LOAD_RENDER;
error = FT_Load_Glyph( face, glyph_index, load_flags );
if ( error )
break;
/* blend new `face->glyph' into old `slot'; */
/* at the first call, `slot' is still empty */
error = sfnt->colr_blend( ttface,
color_index,
slot,
face->glyph );
if ( error )
break;
} while ( FT_Get_Color_Glyph_Layer( face,
base_glyph,
&glyph_index,
&color_index,
&iterator ) );
if ( !error )
slot->format = FT_GLYPH_FORMAT_BITMAP;
/* this call also restores `slot' as the glyph slot */
FT_Done_GlyphSlot( face->glyph );
}
if ( !error )
return error;
/* Failed to do the colored layer. Draw outline instead. */
slot->format = FT_GLYPH_FORMAT_OUTLINE;
}
}
{
FT_ListNode node = NULL;
/* small shortcut for the very common case */
if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
{
renderer = library->cur_renderer;
node = library->renderers.head;
}
else
renderer = FT_Lookup_Renderer( library, slot->format, &node );
error = FT_ERR( Cannot_Render_Glyph );
while ( renderer )
{
error = renderer->render( renderer, slot, render_mode, NULL );
if ( !error ||
FT_ERR_NEQ( error, Cannot_Render_Glyph ) )
break;
/* FT_Err_Cannot_Render_Glyph is returned if the render mode */
/* is unsupported by the current renderer for this glyph image */
/* format. */
/* now, look for another renderer that supports the same */
/* format. */
renderer = FT_Lookup_Renderer( library, slot->format, &node );
}
/* it is not an error if we cannot render a bitmap glyph */
if ( FT_ERR_EQ( error, Cannot_Render_Glyph ) &&
slot->format == FT_GLYPH_FORMAT_BITMAP )
error = FT_Err_Ok;
}
}
#ifdef FT_DEBUG_LEVEL_TRACE
#undef FT_COMPONENT
#define FT_COMPONENT checksum
/*
* Computing the MD5 checksum is expensive, unnecessarily distorting a
* possible profiling of FreeType if compiled with tracing support. For
* this reason, we execute the following code only if explicitly
* requested.
*/
/* we use FT_TRACE3 in this block */
if ( !error &&
ft_trace_levels[trace_checksum] >= 3 &&
slot->bitmap.buffer )
{
FT_Bitmap bitmap;
FT_Error err;
FT_Bitmap_Init( &bitmap );
/* we convert to a single bitmap format for computing the checksum */
/* this also converts the bitmap flow to `down' (i.e., pitch > 0) */
err = FT_Bitmap_Convert( library, &slot->bitmap, &bitmap, 1 );
if ( !err )
{
MD5_CTX ctx;
unsigned char md5[16];
unsigned long coverage = 0;
int i, j;
int rows = (int)bitmap.rows;
int pitch = bitmap.pitch;
FT_TRACE3(( "FT_Render_Glyph: bitmap %dx%d, %s (mode %d)\n",
pitch,
rows,
pixel_modes[slot->bitmap.pixel_mode],
slot->bitmap.pixel_mode ));
for ( i = 0; i < rows; i++ )
for ( j = 0; j < pitch; j++ )
coverage += bitmap.buffer[i * pitch + j];
FT_TRACE3(( " Total coverage: %lu\n", coverage ));
MD5_Init( &ctx );
if ( bitmap.buffer )
MD5_Update( &ctx, bitmap.buffer,
(unsigned long)rows * (unsigned long)pitch );
MD5_Final( md5, &ctx );
FT_TRACE3(( " MD5 checksum: " ));
for ( i = 0; i < 16; i++ )
FT_TRACE3(( "%02X", md5[i] ));
FT_TRACE3(( "\n" ));
}
FT_Bitmap_Done( library, &bitmap );
}
/*
* Dump bitmap in Netpbm format (PBM or PGM).
*/
/* we use FT_TRACE7 in this block */
if ( !error &&
ft_trace_levels[trace_checksum] >= 7 &&
slot->bitmap.buffer )
{
if ( slot->bitmap.rows < 128U &&
slot->bitmap.width < 128U )
{
int rows = (int)slot->bitmap.rows;
int width = (int)slot->bitmap.width;
int pitch = slot->bitmap.pitch;
int i, j, m;
unsigned char* topleft = slot->bitmap.buffer;
if ( pitch < 0 )
topleft -= pitch * ( rows - 1 );
FT_TRACE7(( "Netpbm image: start\n" ));
switch ( slot->bitmap.pixel_mode )
{
case FT_PIXEL_MODE_MONO:
FT_TRACE7(( "P1 %d %d\n", width, rows ));
for ( i = 0; i < rows; i++ )
{
for ( j = 0; j < width; )
for ( m = 128; m > 0 && j < width; m >>= 1, j++ )
FT_TRACE7(( " %d",
( topleft[i * pitch + j / 8] & m ) != 0 ));
FT_TRACE7(( "\n" ));
}
break;
default:
FT_TRACE7(( "P2 %d %d 255\n", width, rows ));
for ( i = 0; i < rows; i++ )
{
for ( j = 0; j < width; j += 1 )
FT_TRACE7(( " %3u", topleft[i * pitch + j] ));
FT_TRACE7(( "\n" ));
}
}
FT_TRACE7(( "Netpbm image: end\n" ));
}
else
FT_TRACE7(( "Netpbm image: too large, omitted\n" ));
}
#undef FT_COMPONENT
#define FT_COMPONENT objs
#endif /* FT_DEBUG_LEVEL_TRACE */
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Render_Glyph( FT_GlyphSlot slot,
FT_Render_Mode render_mode )
{
FT_Library library;
if ( !slot || !slot->face )
return FT_THROW( Invalid_Argument );
library = FT_FACE_LIBRARY( slot->face );
return FT_Render_Glyph_Internal( library, slot, render_mode );
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** M O D U L E S ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**************************************************************************
*
* @Function:
* Destroy_Module
*
* @Description:
* Destroys a given module object. For drivers, this also destroys
* all child faces.
*
* @InOut:
* module ::
* A handle to the target driver object.
*
* @Note:
* The driver _must_ be LOCKED!
*/
static void
Destroy_Module( FT_Module module )
{
FT_Memory memory = module->memory;
FT_Module_Class* clazz = module->clazz;
FT_Library library = module->library;
if ( library && library->auto_hinter == module )
library->auto_hinter = NULL;
/* if the module is a renderer */
if ( FT_MODULE_IS_RENDERER( module ) )
ft_remove_renderer( module );
/* if the module is a font driver, add some steps */
if ( FT_MODULE_IS_DRIVER( module ) )
Destroy_Driver( FT_DRIVER( module ) );
/* finalize the module object */
if ( clazz->module_done )
clazz->module_done( module );
/* discard it */
FT_FREE( module );
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_Add_Module( FT_Library library,
const FT_Module_Class* clazz )
{
FT_Error error;
FT_Memory memory;
FT_Module module = NULL;
FT_UInt nn;
#define FREETYPE_VER_FIXED ( ( (FT_Long)FREETYPE_MAJOR << 16 ) | \
FREETYPE_MINOR )
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !clazz )
return FT_THROW( Invalid_Argument );
/* check FreeType version */
if ( clazz->module_requires > FREETYPE_VER_FIXED )
return FT_THROW( Invalid_Version );
/* look for a module with the same name in the library's table */
for ( nn = 0; nn < library->num_modules; nn++ )
{
module = library->modules[nn];
if ( ft_strcmp( module->clazz->module_name, clazz->module_name ) == 0 )
{
/* this installed module has the same name, compare their versions */
if ( clazz->module_version <= module->clazz->module_version )
return FT_THROW( Lower_Module_Version );
/* remove the module from our list, then exit the loop to replace */
/* it by our new version.. */
FT_Remove_Module( library, module );
break;
}
}
memory = library->memory;
error = FT_Err_Ok;
if ( library->num_modules >= FT_MAX_MODULES )
{
error = FT_THROW( Too_Many_Drivers );
goto Exit;
}
/* allocate module object */
if ( FT_ALLOC( module, clazz->module_size ) )
goto Exit;
/* base initialization */
module->library = library;
module->memory = memory;
module->clazz = (FT_Module_Class*)clazz;
/* check whether the module is a renderer - this must be performed */
/* before the normal module initialization */
if ( FT_MODULE_IS_RENDERER( module ) )
{
/* add to the renderers list */
error = ft_add_renderer( module );
if ( error )
goto Fail;
}
/* is the module a auto-hinter? */
if ( FT_MODULE_IS_HINTER( module ) )
library->auto_hinter = module;
/* if the module is a font driver */
if ( FT_MODULE_IS_DRIVER( module ) )
{
FT_Driver driver = FT_DRIVER( module );
driver->clazz = (FT_Driver_Class)module->clazz;
}
if ( clazz->module_init )
{
error = clazz->module_init( module );
if ( error )
goto Fail;
}
/* add module to the library's table */
library->modules[library->num_modules++] = module;
Exit:
return error;
Fail:
if ( FT_MODULE_IS_RENDERER( module ) )
{
FT_Renderer renderer = FT_RENDERER( module );
if ( renderer->clazz &&
renderer->clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE &&
renderer->raster )
renderer->clazz->raster_class->raster_done( renderer->raster );
}
FT_FREE( module );
goto Exit;
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Module )
FT_Get_Module( FT_Library library,
const char* module_name )
{
FT_Module result = NULL;
FT_Module* cur;
FT_Module* limit;
if ( !library || !module_name )
return result;
cur = library->modules;
limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
if ( ft_strcmp( cur[0]->clazz->module_name, module_name ) == 0 )
{
result = cur[0];
break;
}
return result;
}
/* documentation is in ftobjs.h */
FT_BASE_DEF( const void* )
FT_Get_Module_Interface( FT_Library library,
const char* mod_name )
{
FT_Module module;
/* test for valid `library' delayed to FT_Get_Module() */
module = FT_Get_Module( library, mod_name );
return module ? module->clazz->module_interface : 0;
}
FT_BASE_DEF( FT_Pointer )
ft_module_get_service( FT_Module module,
const char* service_id,
FT_Bool global )
{
FT_Pointer result = NULL;
if ( module )
{
FT_ASSERT( module->clazz && module->clazz->get_interface );
/* first, look for the service in the module */
if ( module->clazz->get_interface )
result = module->clazz->get_interface( module, service_id );
if ( global && !result )
{
/* we didn't find it, look in all other modules then */
FT_Library library = module->library;
FT_Module* cur = library->modules;
FT_Module* limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
{
if ( cur[0] != module )
{
FT_ASSERT( cur[0]->clazz );
if ( cur[0]->clazz->get_interface )
{
result = cur[0]->clazz->get_interface( cur[0], service_id );
if ( result )
break;
}
}
}
}
}
return result;
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_Remove_Module( FT_Library library,
FT_Module module )
{
/* try to find the module from the table, then remove it from there */
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( module )
{
FT_Module* cur = library->modules;
FT_Module* limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
{
if ( cur[0] == module )
{
/* remove it from the table */
library->num_modules--;
limit--;
while ( cur < limit )
{
cur[0] = cur[1];
cur++;
}
limit[0] = NULL;
/* destroy the module */
Destroy_Module( module );
return FT_Err_Ok;
}
}
}
return FT_THROW( Invalid_Driver_Handle );
}
static FT_Error
ft_property_do( FT_Library library,
const FT_String* module_name,
const FT_String* property_name,
void* value,
FT_Bool set,
FT_Bool value_is_string )
{
FT_Module* cur;
FT_Module* limit;
FT_Module_Interface interface;
FT_Service_Properties service;
#ifdef FT_DEBUG_LEVEL_ERROR
const FT_String* set_name = "FT_Property_Set";
const FT_String* get_name = "FT_Property_Get";
const FT_String* func_name = set ? set_name : get_name;
#endif
FT_Bool missing_func;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
if ( !module_name || !property_name || !value )
return FT_THROW( Invalid_Argument );
cur = library->modules;
limit = cur + library->num_modules;
/* search module */
for ( ; cur < limit; cur++ )
if ( !ft_strcmp( cur[0]->clazz->module_name, module_name ) )
break;
if ( cur == limit )
{
FT_TRACE2(( "%s: can't find module `%s'\n",
func_name, module_name ));
return FT_THROW( Missing_Module );
}
/* check whether we have a service interface */
if ( !cur[0]->clazz->get_interface )
{
FT_TRACE2(( "%s: module `%s' doesn't support properties\n",
func_name, module_name ));
return FT_THROW( Unimplemented_Feature );
}
/* search property service */
interface = cur[0]->clazz->get_interface( cur[0],
FT_SERVICE_ID_PROPERTIES );
if ( !interface )
{
FT_TRACE2(( "%s: module `%s' doesn't support properties\n",
func_name, module_name ));
return FT_THROW( Unimplemented_Feature );
}
service = (FT_Service_Properties)interface;
if ( set )
missing_func = FT_BOOL( !service->set_property );
else
missing_func = FT_BOOL( !service->get_property );
if ( missing_func )
{
FT_TRACE2(( "%s: property service of module `%s' is broken\n",
func_name, module_name ));
return FT_THROW( Unimplemented_Feature );
}
return set ? service->set_property( cur[0],
property_name,
value,
value_is_string )
: service->get_property( cur[0],
property_name,
value );
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_Property_Set( FT_Library library,
const FT_String* module_name,
const FT_String* property_name,
const void* value )
{
return ft_property_do( library,
module_name,
property_name,
(void*)value,
TRUE,
FALSE );
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_Property_Get( FT_Library library,
const FT_String* module_name,
const FT_String* property_name,
void* value )
{
return ft_property_do( library,
module_name,
property_name,
value,
FALSE,
FALSE );
}
#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
/* this variant is used for handling the FREETYPE_PROPERTIES */
/* environment variable */
FT_BASE_DEF( FT_Error )
ft_property_string_set( FT_Library library,
const FT_String* module_name,
const FT_String* property_name,
FT_String* value )
{
return ft_property_do( library,
module_name,
property_name,
(void*)value,
TRUE,
TRUE );
}
#endif
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** L I B R A R Y ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_Reference_Library( FT_Library library )
{
if ( !library )
return FT_THROW( Invalid_Library_Handle );
library->refcount++;
return FT_Err_Ok;
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Library( FT_Memory memory,
FT_Library *alibrary )
{
FT_Library library = NULL;
FT_Error error;
if ( !memory || !alibrary )
return FT_THROW( Invalid_Argument );
#ifndef FT_DEBUG_LOGGING
#ifdef FT_DEBUG_LEVEL_ERROR
/* init debugging support */
ft_debug_init();
#endif /* FT_DEBUG_LEVEL_ERROR */
#endif /* !FT_DEBUG_LOGGING */
/* first of all, allocate the library object */
if ( FT_NEW( library ) )
return error;
library->memory = memory;
library->version_major = FREETYPE_MAJOR;
library->version_minor = FREETYPE_MINOR;
library->version_patch = FREETYPE_PATCH;
library->refcount = 1;
/* That's ok now */
*alibrary = library;
return FT_Err_Ok;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( void )
FT_Library_Version( FT_Library library,
FT_Int *amajor,
FT_Int *aminor,
FT_Int *apatch )
{
FT_Int major = 0;
FT_Int minor = 0;
FT_Int patch = 0;
if ( library )
{
major = library->version_major;
minor = library->version_minor;
patch = library->version_patch;
}
if ( amajor )
*amajor = major;
if ( aminor )
*aminor = minor;
if ( apatch )
*apatch = patch;
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_Library( FT_Library library )
{
FT_Memory memory;
if ( !library )
return FT_THROW( Invalid_Library_Handle );
library->refcount--;
if ( library->refcount > 0 )
goto Exit;
memory = library->memory;
/*
* Close all faces in the library. If we don't do this, we can have
* some subtle memory leaks.
*
* Example:
*
* - the cff font driver uses the pshinter module in cff_size_done
* - if the pshinter module is destroyed before the cff font driver,
* opened FT_Face objects managed by the driver are not properly
* destroyed, resulting in a memory leak
*
* Some faces are dependent on other faces, like Type42 faces that
* depend on TrueType faces synthesized internally.
*
* The order of drivers should be specified in driver_name[].
*/
{
FT_UInt m, n;
const char* driver_name[] = { "type42", NULL };
for ( m = 0;
m < sizeof ( driver_name ) / sizeof ( driver_name[0] );
m++ )
{
for ( n = 0; n < library->num_modules; n++ )
{
FT_Module module = library->modules[n];
const char* module_name = module->clazz->module_name;
FT_List faces;
if ( driver_name[m] &&
ft_strcmp( module_name, driver_name[m] ) != 0 )
continue;
if ( ( module->clazz->module_flags & FT_MODULE_FONT_DRIVER ) == 0 )
continue;
FT_TRACE7(( "FT_Done_Library: close faces for %s\n", module_name ));
faces = &FT_DRIVER( module )->faces_list;
while ( faces->head )
{
FT_Done_Face( FT_FACE( faces->head->data ) );
if ( faces->head )
FT_TRACE0(( "FT_Done_Library: failed to free some faces\n" ));
}
}
}
}
/* Close all other modules in the library */
#if 1
/* XXX Modules are removed in the reversed order so that */
/* type42 module is removed before truetype module. This */
/* avoids double free in some occasions. It is a hack. */
while ( library->num_modules > 0 )
FT_Remove_Module( library,
library->modules[library->num_modules - 1] );
#else
{
FT_UInt n;
for ( n = 0; n < library->num_modules; n++ )
{
FT_Module module = library->modules[n];
if ( module )
{
Destroy_Module( module );
library->modules[n] = NULL;
}
}
}
#endif
FT_FREE( library );
Exit:
return FT_Err_Ok;
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( void )
FT_Set_Debug_Hook( FT_Library library,
FT_UInt hook_index,
FT_DebugHook_Func debug_hook )
{
if ( library && debug_hook &&
hook_index <
( sizeof ( library->debug_hooks ) / sizeof ( void* ) ) )
library->debug_hooks[hook_index] = debug_hook;
}
/* documentation is in ftmodapi.h */
FT_EXPORT_DEF( FT_TrueTypeEngineType )
FT_Get_TrueType_Engine_Type( FT_Library library )
{
FT_TrueTypeEngineType result = FT_TRUETYPE_ENGINE_TYPE_NONE;
if ( library )
{
FT_Module module = FT_Get_Module( library, "truetype" );
if ( module )
{
FT_Service_TrueTypeEngine service;
service = (FT_Service_TrueTypeEngine)
ft_module_get_service( module,
FT_SERVICE_ID_TRUETYPE_ENGINE,
0 );
if ( service )
result = service->engine_type;
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Get_SubGlyph_Info( FT_GlyphSlot glyph,
FT_UInt sub_index,
FT_Int *p_index,
FT_UInt *p_flags,
FT_Int *p_arg1,
FT_Int *p_arg2,
FT_Matrix *p_transform )
{
FT_Error error = FT_ERR( Invalid_Argument );
if ( glyph &&
glyph->subglyphs &&
glyph->format == FT_GLYPH_FORMAT_COMPOSITE &&
sub_index < glyph->num_subglyphs )
{
FT_SubGlyph subg = glyph->subglyphs + sub_index;
*p_index = subg->index;
*p_flags = subg->flags;
*p_arg1 = subg->arg1;
*p_arg2 = subg->arg2;
*p_transform = subg->transform;
error = FT_Err_Ok;
}
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Bool )
FT_Get_Color_Glyph_Layer( FT_Face face,
FT_UInt base_glyph,
FT_UInt *aglyph_index,
FT_UInt *acolor_index,
FT_LayerIterator* iterator )
{
TT_Face ttface;
SFNT_Service sfnt;
if ( !face ||
!aglyph_index ||
!acolor_index ||
!iterator ||
base_glyph >= (FT_UInt)face->num_glyphs )
return 0;
if ( !FT_IS_SFNT( face ) )
return 0;
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
if ( sfnt->get_colr_layer )
return sfnt->get_colr_layer( ttface,
base_glyph,
aglyph_index,
acolor_index,
iterator );
else
return 0;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Bool )
FT_Get_Color_Glyph_Paint( FT_Face face,
FT_UInt base_glyph,
FT_Color_Root_Transform root_transform,
FT_OpaquePaint* paint )
{
TT_Face ttface;
SFNT_Service sfnt;
if ( !face || !paint )
return 0;
if ( !FT_IS_SFNT( face ) )
return 0;
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
if ( sfnt->get_colr_layer )
return sfnt->get_colr_glyph_paint( ttface,
base_glyph,
root_transform,
paint );
else
return 0;
}
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Bool )
FT_Get_Color_Glyph_ClipBox( FT_Face face,
FT_UInt base_glyph,
FT_ClipBox* clip_box )
{
TT_Face ttface;
SFNT_Service sfnt;
if ( !face || !clip_box )
return 0;
if ( !FT_IS_SFNT( face ) )
return 0;
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
if ( sfnt->get_color_glyph_clipbox )
return sfnt->get_color_glyph_clipbox( ttface,
base_glyph,
clip_box );
else
return 0;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Bool )
FT_Get_Paint_Layers( FT_Face face,
FT_LayerIterator* layer_iterator,
FT_OpaquePaint* paint )
{
TT_Face ttface;
SFNT_Service sfnt;
if ( !face || !paint || !layer_iterator )
return 0;
if ( !FT_IS_SFNT( face ) )
return 0;
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
if ( sfnt->get_paint_layers )
return sfnt->get_paint_layers( ttface, layer_iterator, paint );
else
return 0;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Bool )
FT_Get_Paint( FT_Face face,
FT_OpaquePaint opaque_paint,
FT_COLR_Paint* paint )
{
TT_Face ttface;
SFNT_Service sfnt;
if ( !face || !paint )
return 0;
if ( !FT_IS_SFNT( face ) )
return 0;
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
if ( sfnt->get_paint )
return sfnt->get_paint( ttface, opaque_paint, paint );
else
return 0;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Bool )
FT_Get_Colorline_Stops ( FT_Face face,
FT_ColorStop * color_stop,
FT_ColorStopIterator *iterator )
{
TT_Face ttface;
SFNT_Service sfnt;
if ( !face || !color_stop || !iterator )
return 0;
if ( !FT_IS_SFNT( face ) )
return 0;
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
if ( sfnt->get_colorline_stops )
return sfnt->get_colorline_stops ( ttface, color_stop, iterator );
else
return 0;
}
/* END */