| /***************************************************************************/ |
| /* */ |
| /* pfrdrivr.c */ |
| /* */ |
| /* FreeType PFR driver interface (body). */ |
| /* */ |
| /* Copyright 2002-2015 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, |
| pfr_face_get_kerning, |
| pfr_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, |
| |
| 0, /* FT_Module_Constructor */ |
| 0, /* FT_Module_Destructor */ |
| pfr_get_service |
| }, |
| |
| sizeof ( PFR_FaceRec ), |
| sizeof ( PFR_SizeRec ), |
| sizeof ( PFR_SlotRec ), |
| |
| pfr_face_init, |
| pfr_face_done, |
| 0, /* FT_Size_InitFunc */ |
| 0, /* FT_Size_DoneFunc */ |
| pfr_slot_init, |
| pfr_slot_done, |
| |
| pfr_slot_load, |
| |
| pfr_get_kerning, |
| 0, /* FT_Face_AttachFunc */ |
| 0, /* FT_Face_GetAdvancesFunc */ |
| 0, /* FT_Size_RequestFunc */ |
| 0, /* FT_Size_SelectFunc */ |
| }; |
| |
| |
| /* END */ |
