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freetype2/src/base/ftobjs.c

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/****************************************************************************
*
* ftobjs.c
*
* The FreeType private base classes (body).
*
* Copyright (C) 1996-2023 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 <math.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
#define PIXEL_BITS 8
#define ONE_PIXEL ( 1 << PIXEL_BITS )
#define TRUNC( x ) (int)( ( x ) >> PIXEL_BITS )
#define UPSCALE( x ) ( ( x ) * ( ONE_PIXEL >> 6 ) )
#define DOWNSCALE( x ) ( ( x ) >> ( PIXEL_BITS - 6 ) )
#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 = NULL;
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->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. */
/* `slot->internal` might be NULL in out-of-memory situations. */
if ( slot->internal && 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_Refresh_Glyph( FT_Face face,
FT_UInt glyph_index)
{
//ft_glyphslot_free_bitmap( face->garray[glyph_index] );
face->garray[glyph_index]->format = FT_GLYPH_FORMAT_OUTLINE;
// face->garray[glyph_index]->bitmap.width = 0;
// face->garray[glyph_index]->bitmap.rows = 0;
// face->garray[glyph_index]->bitmap.pitch = 0;
// face->garray[glyph_index]->bitmap.pixel_mode = 0;
}
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->garray[glyph_index];
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 ( ( load_flags & FT_LOAD_NO_SVG ) == 0 &&
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", (double)slot->advance.x / 64 ));
FT_TRACE5(( " y advance: %f\n", (double)slot->advance.y / 64 ));
FT_TRACE5(( " linear x advance: %f\n",
(double)slot->linearHoriAdvance / 65536 ));
FT_TRACE5(( " linear y advance: %f\n",
(double)slot->linearVertAdvance / 65536 ));
{
FT_Glyph_Metrics* metrics = &slot->metrics;
FT_TRACE5(( " metrics:\n" ));
FT_TRACE5(( " width: %f\n", (double)metrics->width / 64 ));
FT_TRACE5(( " height: %f\n", (double)metrics->height / 64 ));
FT_TRACE5(( "\n" ));
FT_TRACE5(( " horiBearingX: %f\n",
(double)metrics->horiBearingX / 64 ));
FT_TRACE5(( " horiBearingY: %f\n",
(double)metrics->horiBearingY / 64 ));
FT_TRACE5(( " horiAdvance: %f\n",
(double)metrics->horiAdvance / 64 ));
FT_TRACE5(( "\n" ));
FT_TRACE5(( " vertBearingX: %f\n",
(double)metrics->vertBearingX / 64 ));
FT_TRACE5(( " vertBearingY: %f\n",
(double)metrics->vertBearingY / 64 ));
FT_TRACE5(( " vertAdvance: %f\n",
(double)metrics->vertAdvance / 64 ));
}
#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,
void* size_,
void* driver_ )
{
FT_Size size = (FT_Size)size_;
FT_Driver driver = (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,
void* face_,
void* driver_ )
{
FT_Face face = (FT_Face)face_;
FT_Driver driver = (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,
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,
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 *anexternal_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 ( *anexternal_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 );
/* Stream may have been changed. */
*astream = face->stream;
*anexternal_stream =
( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0;
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 );
}
FT_EXPORT_DEF( FT_Error )
FT_New_Face2( FT_Library library,
const char* pathname,
FT_Long face_index,
FT_Face *aface,
FT_UInt flags)
{
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.flags |= flags;
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 = (FT_Memory)stream->descriptor.pointer;
FT_FREE( stream->base );
stream->size = 0;
stream->close = NULL;
FT_FREE( stream );
}
/* 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->descriptor.pointer = memory;
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_Memory memory = library->memory;
args.driver = NULL;
args.flags = 0;
if ( driver_name )
{
args.driver = FT_Get_Module( library, driver_name );
if ( !args.driver )
{
FT_FREE( base );
return FT_THROW( Missing_Module );
}
args.flags = args.flags | FT_OPEN_DRIVER;
}
/* `memory_stream_close` also frees the stream object. */
error = new_memory_stream( library,
base,
size,
memory_stream_close,
&args.stream );
if ( error )
{
FT_FREE( base );
return error;
}
args.flags |= FT_OPEN_STREAM;
#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
return ft_open_face_internal( library, &args, face_index, aface, 0 );
}
/* 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 ? "t1cid" : "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_ULong 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_ULONG( rlen ) )
goto Exit;
if ( !rlen )
return FT_THROW( Cannot_Open_Resource );
if ( 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, 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,
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_Vector
Lerp( float T, FT_Vector P0, FT_Vector P1 )
{
FT_Vector p;
p.x = P0.x + T * ( P1.x - P0.x );
p.y = P0.y + T * ( P1.y - P0.y );
return p;
}
int conic_to2(FT_GlyphSlot* slot, FT_Vector *control, FT_Vector *from, FT_Vector *to, FT_PreLine *ptr)
{
/*
Calculate devsq as the square of four times the
distance from the control point to the midpoint of the curve.
This is the place at which the curve is furthest from the
line joining the control points.
4 x point on curve = p0 + 2p1 + p2
4 x midpoint = 4p1
The division by four is omitted to save time.
*/
//FT_PreLine ptr = (*slot)->prelines;
//if((*slot)->glyph_index == 38)
//printf("conic from %d, %d to %d, %d via %d, %d\n", from->x, from->y, to->x, to->y, control->x, control->y);
FT_Vector aP0 = { from->x , from->y};
FT_Vector aP1 = { control->x, control->y };
FT_Vector aP2 = { to->x, to->y };
float devx = aP0.x - aP1.x - aP1.x + aP2.x;
float devy = aP0.y - aP1.y - aP1.y + aP2.y;
float devsq = devx * devx + devy * devy;
if ( devsq < 0.333f )
{
//dense_line_to( &aP2, worker );
FT_PreLine pl3 = malloc(sizeof(FT_PreLineRec));
pl3->x1 = (*ptr)->x2;
pl3->y1 = (*ptr)->y2;
pl3->x2 = aP2.x;
pl3->y2 = aP2.y;
pl3->next = NULL;
pl3->ismove = 0;
(*ptr)->next = pl3;
*ptr = (*ptr)->next;
return 0;
}
/*
According to Raph Levien, the reason for the subdivision by n (instead of
recursive division by the Casteljau system) is that "I expect the flatness
computation to be semi-expensive (it's done once rather than on each potential
subdivision) and also because you'll often get fewer subdivisions. Taking a
circular arc as a simplifying assumption, where I get n, a recursive approach
would get 2^ceil(lg n), which, if I haven't made any horrible mistakes, is
expected to be 33% more in the limit".
*/
const float tol = 3.0f;
int n = (int)floor( sqrt( sqrt( tol * devsq ) ) )/8;
FT_Vector p = aP0;
float nrecip = 1.0f / ( n + 1.0f );
float t = 0.0f;
for ( int i = 0; i < n; i++ )
{
t += nrecip;
FT_Vector next = Lerp( t, Lerp( t, aP0, aP1 ), Lerp( t, aP1, aP2 ) );
//dense_line_to(&next, worker );
FT_PreLine pl4 = malloc(sizeof(FT_PreLineRec));
pl4->x1 = (*ptr)->x2;
pl4->y1 = (*ptr)->y2;
pl4->x2 = next.x;
pl4->y2 = next.y;
pl4->next = NULL;
pl4->ismove = 0;
(*ptr)->next = pl4;
*ptr = (*ptr)->next;
p = next;
}
//dense_line_to( &aP2, worker );
FT_PreLine pl5 = malloc(sizeof(FT_PreLineRec));
pl5->x1 = (*ptr)->x2;
pl5->y1 = (*ptr)->y2;
pl5->x2 = aP2.x;
pl5->y2 = aP2.y;
pl5->next = NULL;
pl5->ismove = 0;
(*ptr)->next = pl5;
*ptr = (*ptr)->next;
return 0;
}
FT_Error ft_decompose_outline(FT_GlyphSlot* slot){
FT_Vector v_last;
FT_Vector v_control;
FT_Vector v_start;
FT_Vector* point;
FT_Vector* limit;
char* tags;
FT_Error error;
FT_Int n; /* index of contour in outline */
FT_Int first; /* index of first point in contour */
FT_Int last; /* index of last point in contour */
FT_Int tag; /* current point's state */
FT_Int shift;
FT_Pos delta;
FT_Outline* outline = &(*slot)->outline;
if ( !outline )
return FT_THROW( Invalid_Outline );
last = -1;
FT_PreLine ptr = (*slot)->prelines;
for ( n = 0; n < outline->n_contours; n++ )
{
FT_TRACE5(( "ft_decompose_outline: Contour %d\n", n ));
first = last + 1;
last = outline->contours[n];
if ( last < first ){
FT_TRACE5(( "Invalid Outline"));
break;
}
limit = outline->points + last;
v_start = outline->points[first];
v_last = outline->points[last];
v_control = v_start;
point = outline->points + first;
tags = outline->tags + first;
tag = FT_CURVE_TAG( tags[0] );
/* A contour cannot start with a cubic control point! */
if ( tag == FT_CURVE_TAG_CUBIC )
{
FT_TRACE5(( "Invalid Outline"));
break;
}
/* check first point to determine origin */
if ( tag == FT_CURVE_TAG_CONIC )
{
/* first point is conic control. Yes, this happens. */
if ( FT_CURVE_TAG( outline->tags[last] ) == FT_CURVE_TAG_ON )
{
/* start at last point if it is on the curve */
v_start = v_last;
limit--;
}
else
{
/* if both first and last points are conic, */
/* start at their middle and record its position */
/* for closure */
v_start.x = ( v_start.x + v_last.x ) / 2;
v_start.y = ( v_start.y + v_last.y ) / 2;
/* v_last = v_start; */
}
point--;
tags--;
}
// if (((*slot)->glyph_index == 37))
// {
// printf("moveit\n");
// }
FT_TRACE5(( " move to (%.2f, %.2f)\n",
(double)v_start.x / 64, (double)v_start.y / 64 ));
// error = func_interface->move_to( &v_start, user );
// if ( error )
// goto Exit;
FT_PreLine pl = malloc(sizeof(FT_PreLineRec));
pl->x1 = v_start.x;
pl->y1 = v_start.y;
pl->x2 = v_start.x;
pl->y2 = v_start.y;
pl->next = NULL;
pl->ismove = 1;
if((*slot)->prelines == NULL){
ptr = (*slot)->prelines = pl;
}else{
ptr->next = pl;
ptr = ptr->next;
}
while ( point < limit )
{
point++;
tags++;
tag = FT_CURVE_TAG( tags[0] );
switch ( tag )
{
case FT_CURVE_TAG_ON: /* emit a single line_to */
{
FT_Vector vec;
vec.x = point->x;
vec.y = point->y;
FT_TRACE5(( " line to (%.2f, %.2f)\n",
(double)vec.x / 64, (double)vec.y / 64 ));
//error = func_interface->line_to( &vec, user );
//if((*slot)->glyph_index == 37)
// printf( " line to (%.2f, %.2f)\n",
//(double)vec.x / 64, (double)vec.y / 64 );
FT_PreLine pl3 = malloc(sizeof(FT_PreLineRec));
pl3->x1 = ptr->x2;
pl3->y1 = ptr->y2;
pl3->x2 = vec.x;
pl3->y2 = vec.y;
pl3->next = NULL;
pl3->ismove = 0;
ptr->next = pl3;
ptr = ptr->next;
continue;
}
case FT_CURVE_TAG_CONIC: /* consume conic arcs */
// v_control.x = SCALED( point->x );
// v_control.y = SCALED( point->y );
v_control.x = point->x ;
v_control.y = point->y ;
Do_Conic:
if ( point < limit )
{
FT_Vector vec;
FT_Vector v_middle;
point++;
tags++;
tag = FT_CURVE_TAG( tags[0] );
// vec.x = SCALED( point->x );
// vec.y = SCALED( point->y );
vec.x = point->x;
vec.y = point->y;
if ( tag == FT_CURVE_TAG_ON )
{
FT_TRACE5(( " conic to (%.2f, %.2f)"
" with control (%.2f, %.2f)\n",
(double)vec.x / 64,
(double)vec.y / 64,
(double)v_control.x / 64,
(double)v_control.y / 64 ));
FT_Vector vex0 = {ptr->x2, ptr->y2};
error = conic_to2(slot, &v_control, &vex0,&vec , &ptr);
// if ( error )
// goto Exit;
continue;
}
if ( tag != FT_CURVE_TAG_CONIC )
{
FT_TRACE5( ( "Invalid Outline" ) );
break;
}
v_middle.x = ( v_control.x + vec.x ) / 2;
v_middle.y = ( v_control.y + vec.y ) / 2;
FT_TRACE5(( " conic to (%.2f, %.2f)"
" with control (%.2f, %.2f)\n",
(double)v_middle.x / 64,
(double)v_middle.y / 64,
(double)v_control.x / 64,
(double)v_control.y / 64 ));
FT_Vector vex = {ptr->x2, ptr->y2};
error = conic_to2(slot, &v_control, &vex,&v_middle, &ptr);
// if ( error )
// goto Exit;
v_control = vec;
goto Do_Conic;
}
FT_TRACE5(( " conic to (%.2f, %.2f)"
" with control (%.2f, %.2f)\n",
(double)v_start.x / 64,
(double)v_start.y / 64,
(double)v_control.x / 64,
(double)v_control.y / 64 ));
FT_Vector vex2 = {ptr->x2, ptr->y2};
error = conic_to2( slot, &v_control, &vex2, &v_start, &ptr );
//goto Close;
}
}
// /* close the contour with a line segment */
// FT_TRACE5(( " line to (%.2f, %.2f)\n",
// (double)v_start.x / 64, (double)v_start.y / 64 ));
// error = func_interface->line_to( &v_start, user );
//if((*slot)->glyph_index == 37)
//printf( " line to (%.2f, %.2f)\n",
// (double)v_start.x / 64, (double)v_start.y / 64 );
FT_PreLine pl2 = malloc(sizeof(FT_PreLineRec));
pl2->x1 = ptr->x2;
pl2->y1 = ptr->y2;
pl2->x2 = v_start.x;
pl2->y2 = v_start.y;
pl2->next = NULL;
pl2->ismove = 0;
ptr->next = pl2;
ptr = ptr->next;
}
return 0;
}
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
/* only use lower 31 bits together with sign bit */
if ( face_index > 0 )
face_index &= 0x7FFFFFFFL;
else
{
face_index = -face_index;
face_index &= 0x7FFFFFFFL;
face_index = -face_index;
}
#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 ( !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;
/* Do this error check after `FT_Stream_New` to ensure that the */
/* 'close' callback is called. */
if ( !aface && face_index >= 0 )
{
error = FT_THROW( Invalid_Argument );
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 );
if (args->flags & FT_OPEN_PRELOAD)
{
/* Preload the font here */
}
/* 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;
// FT_Outline_Decompose here
}
face->garray = (FT_GlyphSlot*)malloc(
face->driver->clazz->slot_object_size * face->num_glyphs );
//error = FT_Set_Char_Size( face, 0, 160 * 64, 300, 300 );
error = FT_Set_Pixel_Sizes( face, 0, 200);
// int glyph_index = FT_Get_Char_Index( face, 'A' );
// error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_HINTING );
for ( int gindex = 0; gindex < face->num_glyphs; gindex++ )
{
driver = face->driver;
FT_Driver_Class clazz = driver->clazz;
memory = driver->root.memory;
FT_ALLOC(face->garray[gindex], clazz->slot_object_size);
face->garray[gindex]->face = face;
face->garray[gindex]->prel_shifted = 0;
face->garray[gindex]->glyph_index = gindex;
ft_glyphslot_init(face->garray[gindex]);
face->garray[gindex]->next = NULL;
*face->glyph = *face->garray[gindex];
FT_Load_Glyph(face, gindex, FT_LOAD_NO_HINTING);
// *face->garray[gindex]->prelines = (FT_PreLineRec){1,2,3,4, NULL}; // need to revise structs and pointers.
// FT_PreLine pl = face->garray[gindex]->prelines = malloc(sizeof(FT_PreLineRec));
// pl->x1 = 0;
// pl->x2 = 1;
// pl->y1 = 2;
// pl->y2 = 3;
// pl->next = NULL;
ft_decompose_outline(&face->garray[gindex]);
}
}
/* 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,
const 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->height || !req->width )
{
if ( h == 0 )
{
FT_ERROR(( "FT_Request_Metrics: Divide by zero\n" ));
error = FT_ERR( Divide_By_Zero );
goto Exit;
}
metrics->y_scale = FT_DivFix( scaled_h, h );
}
if ( req->width )
{
if ( w == 0 )
{
FT_ERROR(( "FT_Request_Metrics: Divide by zero\n" ));
error = FT_ERR( Divide_By_Zero );
goto Exit;
}
metrics->x_scale = FT_DivFix( scaled_w, w );
}
else
{
metrics->x_scale = metrics->y_scale;
scaled_w = FT_MulDiv( scaled_h, w, h );
}
if ( !req->height )
{
metrics->y_scale = metrics->x_scale;
scaled_h = FT_MulDiv( scaled_w, h, w );
}
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;
}
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, (double)metrics->x_scale / 65536 ));
FT_TRACE5(( " y scale: %ld (%f)\n",
metrics->y_scale, (double)metrics->y_scale / 65536 ));
FT_TRACE5(( " ascender: %f\n",
(double)metrics->ascender / 64 ));
FT_TRACE5(( " descender: %f\n",
(double)metrics->descender / 64 ));
FT_TRACE5(( " height: %f\n",
(double)metrics->height / 64 ));
FT_TRACE5(( " max advance: %f\n",
(double)metrics->max_advance / 64 ));
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 ( !face->size )
return FT_THROW( Invalid_Size_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, (double)metrics->x_scale / 65536 ));
FT_TRACE5(( " y scale: %ld (%f)\n",
metrics->y_scale, (double)metrics->y_scale / 65536 ));
FT_TRACE5(( " ascender: %f\n",
(double)metrics->ascender / 64 ));
FT_TRACE5(( " descender: %f\n",
(double)metrics->descender / 64 ));
FT_TRACE5(( " height: %f\n",
(double)metrics->height / 64 ));
FT_TRACE5(( " max advance: %f\n",
(double)metrics->max_advance / 64 ));
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 ));
if(pitch<0)
{
pitch = -pitch;
}
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 */
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