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/****************************************************************************
*
* pfrdrivr.c
*
* FreeType PFR driver interface (body).
*
* Copyright (C) 2002-2019 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 <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_SERVICE_PFR_H
#include FT_SERVICE_FONT_FORMAT_H
#include "pfrdrivr.h"
#include "pfrobjs.h"
#include "pfrerror.h"
FT_CALLBACK_DEF( FT_Error )
pfr_get_kerning( FT_Face pfrface, /* PFR_Face */
FT_UInt left,
FT_UInt right,
FT_Vector *avector )
{
PFR_Face face = (PFR_Face)pfrface;
PFR_PhyFont phys = &face->phy_font;
(void)pfr_face_get_kerning( pfrface, left, right, avector );
/* convert from metrics to outline units when necessary */
if ( phys->outline_resolution != phys->metrics_resolution )
{
if ( avector->x != 0 )
avector->x = FT_MulDiv( avector->x,
(FT_Long)phys->outline_resolution,
(FT_Long)phys->metrics_resolution );
if ( avector->y != 0 )
avector->y = FT_MulDiv( avector->y,
(FT_Long)phys->outline_resolution,
(FT_Long)phys->metrics_resolution );
}
return FT_Err_Ok;
}
/*
* PFR METRICS SERVICE
*
*/
FT_CALLBACK_DEF( FT_Error )
pfr_get_advance( FT_Face pfrface, /* PFR_Face */
FT_UInt gindex,
FT_Pos *anadvance )
{
PFR_Face face = (PFR_Face)pfrface;
FT_Error error = FT_ERR( Invalid_Argument );
*anadvance = 0;
if ( !gindex )
goto Exit;
gindex--;
if ( face )
{
PFR_PhyFont phys = &face->phy_font;
if ( gindex < phys->num_chars )
{
*anadvance = phys->chars[gindex].advance;
error = FT_Err_Ok;
}
}
Exit:
return error;
}
FT_CALLBACK_DEF( FT_Error )
pfr_get_metrics( FT_Face pfrface, /* PFR_Face */
FT_UInt *anoutline_resolution,
FT_UInt *ametrics_resolution,
FT_Fixed *ametrics_x_scale,
FT_Fixed *ametrics_y_scale )
{
PFR_Face face = (PFR_Face)pfrface;
PFR_PhyFont phys = &face->phy_font;
FT_Fixed x_scale, y_scale;
FT_Size size = face->root.size;
if ( anoutline_resolution )
*anoutline_resolution = phys->outline_resolution;
if ( ametrics_resolution )
*ametrics_resolution = phys->metrics_resolution;
x_scale = 0x10000L;
y_scale = 0x10000L;
if ( size )
{
x_scale = FT_DivFix( size->metrics.x_ppem << 6,
(FT_Long)phys->metrics_resolution );
y_scale = FT_DivFix( size->metrics.y_ppem << 6,
(FT_Long)phys->metrics_resolution );
}
if ( ametrics_x_scale )
*ametrics_x_scale = x_scale;
if ( ametrics_y_scale )
*ametrics_y_scale = y_scale;
return FT_Err_Ok;
}
static
const FT_Service_PfrMetricsRec pfr_metrics_service_rec =
{
pfr_get_metrics, /* get_metrics */
pfr_face_get_kerning, /* get_kerning */
pfr_get_advance /* get_advance */
};
/*
* SERVICE LIST
*
*/
static const FT_ServiceDescRec pfr_services[] =
{
{ FT_SERVICE_ID_PFR_METRICS, &pfr_metrics_service_rec },
{ FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_PFR },
{ NULL, NULL }
};
FT_CALLBACK_DEF( FT_Module_Interface )
pfr_get_service( FT_Module module,
const FT_String* service_id )
{
FT_UNUSED( module );
return ft_service_list_lookup( pfr_services, service_id );
}
FT_CALLBACK_TABLE_DEF
const FT_Driver_ClassRec pfr_driver_class =
{
{
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_SCALABLE,
sizeof ( FT_DriverRec ),
"pfr",
0x10000L,
0x20000L,
NULL, /* module-specific interface */
NULL, /* FT_Module_Constructor module_init */
NULL, /* FT_Module_Destructor module_done */
pfr_get_service /* FT_Module_Requester get_interface */
},
sizeof ( PFR_FaceRec ),
sizeof ( PFR_SizeRec ),
sizeof ( PFR_SlotRec ),
pfr_face_init, /* FT_Face_InitFunc init_face */
pfr_face_done, /* FT_Face_DoneFunc done_face */
NULL, /* FT_Size_InitFunc init_size */
NULL, /* FT_Size_DoneFunc done_size */
pfr_slot_init, /* FT_Slot_InitFunc init_slot */
pfr_slot_done, /* FT_Slot_DoneFunc done_slot */
pfr_slot_load, /* FT_Slot_LoadFunc load_glyph */
pfr_get_kerning, /* FT_Face_GetKerningFunc get_kerning */
NULL, /* FT_Face_AttachFunc attach_file */
NULL, /* FT_Face_GetAdvancesFunc get_advances */
NULL, /* FT_Size_RequestFunc request_size */
NULL, /* FT_Size_SelectFunc select_size */
};
/* END */
|
