ref: ee695eff4329234e20abb68ff3100d3b15929418
dir: /libfreetype/pfrdrivr.c/
/***************************************************************************/
/* */
/* pfrdrivr.c */
/* */
/* FreeType PFR driver interface (body). */
/* */
/* Copyright 2002 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_INTERNAL_PFR_H
#include "pfrdrivr.h"
#include "pfrobjs.h"
static FT_Error
pfr_get_kerning( PFR_Face face,
FT_UInt left,
FT_UInt right,
FT_Vector *avector )
{
FT_Error error;
error = pfr_face_get_kerning( face, left, right, avector );
if ( !error )
{
PFR_PhyFont phys = &face->phy_font;
/* 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, phys->outline_resolution,
phys->metrics_resolution );
if ( avector->y != 0 )
avector->y = FT_MulDiv( avector->x, phys->outline_resolution,
phys->metrics_resolution );
}
}
return error;
}
static FT_Error
pfr_get_advance( PFR_Face face,
FT_UInt gindex,
FT_Pos *aadvance )
{
FT_Error error = FT_Err_Bad_Argument;
*aadvance = 0;
if ( face )
{
PFR_PhyFont phys = &face->phy_font;
if ( gindex < phys->num_chars )
{
*aadvance = phys->chars[ gindex ].advance;
error = 0;
}
}
return error;
}
static FT_Error
pfr_get_metrics( PFR_Face face,
FT_UInt *aoutline_resolution,
FT_UInt *ametrics_resolution,
FT_Fixed *ametrics_x_scale,
FT_Fixed *ametrics_y_scale )
{
PFR_PhyFont phys = &face->phy_font;
FT_Fixed x_scale, y_scale;
FT_Size size = face->root.size;
if ( aoutline_resolution )
*aoutline_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,
phys->metrics_resolution );
y_scale = FT_DivFix( size->metrics.y_ppem << 6,
phys->metrics_resolution );
}
if ( ametrics_x_scale )
*ametrics_x_scale = x_scale;
if ( ametrics_y_scale )
*ametrics_y_scale = y_scale;
return 0;
}
FT_CALLBACK_TABLE_DEF
const FT_PFR_ServiceRec pfr_service_rec =
{
(FT_PFR_GetMetricsFunc) pfr_get_metrics,
(FT_PFR_GetKerningFunc) pfr_get_kerning,
(FT_PFR_GetAdvanceFunc) pfr_get_advance
};
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,
(FT_PFR_Service) &pfr_service_rec, /* format interface */
(FT_Module_Constructor)NULL,
(FT_Module_Destructor) NULL,
(FT_Module_Requester) NULL
},
sizeof( PFR_FaceRec ),
sizeof( PFR_SizeRec ),
sizeof( PFR_SlotRec ),
(FT_Face_InitFunc) pfr_face_init,
(FT_Face_DoneFunc) pfr_face_done,
(FT_Size_InitFunc) NULL,
(FT_Size_DoneFunc) NULL,
(FT_Slot_InitFunc) pfr_slot_init,
(FT_Slot_DoneFunc) pfr_slot_done,
(FT_Size_ResetPointsFunc) NULL,
(FT_Size_ResetPixelsFunc) NULL,
(FT_Slot_LoadFunc) pfr_slot_load,
(FT_Face_GetKerningFunc) pfr_get_kerning,
(FT_Face_AttachFunc) 0,
(FT_Face_GetAdvancesFunc) 0
};
/* END */