ref: f4d1c11faa116daad655b50828a434babbdaed2a
dir: /src/autofit/afmodule.c/
/***************************************************************************/
/* */
/* afmodule.c */
/* */
/* Auto-fitter module implementation (body). */
/* */
/* Copyright 2003-2015 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 "afglobal.h"
#include "afmodule.h"
#include "afloader.h"
#include "aferrors.h"
#include "afpic.h"
#ifdef FT_DEBUG_AUTOFIT
int _af_debug_disable_horz_hints;
int _af_debug_disable_vert_hints;
int _af_debug_disable_blue_hints;
void* _af_debug_hints;
#endif
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include FT_AUTOHINTER_H
#include FT_SERVICE_PROPERTIES_H
/*************************************************************************/
/* */
/* 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 trace_afmodule
static FT_Error
af_property_get_face_globals( FT_Face face,
AF_FaceGlobals* aglobals,
AF_Module module )
{
FT_Error error = FT_Err_Ok;
AF_FaceGlobals globals;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
globals = (AF_FaceGlobals)face->autohint.data;
if ( !globals )
{
/* trigger computation of the global style data */
/* in case it hasn't been done yet */
error = af_face_globals_new( face, &globals, module );
if ( !error )
{
face->autohint.data =
(FT_Pointer)globals;
face->autohint.finalizer =
(FT_Generic_Finalizer)af_face_globals_free;
}
}
if ( !error )
*aglobals = globals;
return error;
}
static FT_Error
af_property_set( FT_Module ft_module,
const char* property_name,
const void* value )
{
FT_Error error = FT_Err_Ok;
AF_Module module = (AF_Module)ft_module;
if ( !ft_strcmp( property_name, "fallback-script" ) )
{
FT_UInt* fallback_script = (FT_UInt*)value;
FT_UInt ss;
/* We translate the fallback script to a fallback style that uses */
/* `fallback-script' as its script and `AF_COVERAGE_NONE' as its */
/* coverage value. */
for ( ss = 0; AF_STYLE_CLASSES_GET[ss]; ss++ )
{
AF_StyleClass style_class = AF_STYLE_CLASSES_GET[ss];
if ( (FT_UInt)style_class->script == *fallback_script &&
style_class->coverage == AF_COVERAGE_DEFAULT )
{
module->fallback_style = ss;
break;
}
}
if ( !AF_STYLE_CLASSES_GET[ss] )
{
FT_TRACE0(( "af_property_set: Invalid value %d for property `%s'\n",
fallback_script, property_name ));
return FT_THROW( Invalid_Argument );
}
return error;
}
else if ( !ft_strcmp( property_name, "default-script" ) )
{
FT_UInt* default_script = (FT_UInt*)value;
module->default_script = *default_script;
return error;
}
else if ( !ft_strcmp( property_name, "increase-x-height" ) )
{
FT_Prop_IncreaseXHeight* prop = (FT_Prop_IncreaseXHeight*)value;
AF_FaceGlobals globals;
error = af_property_get_face_globals( prop->face, &globals, module );
if ( !error )
globals->increase_x_height = prop->limit;
return error;
}
FT_TRACE0(( "af_property_set: missing property `%s'\n",
property_name ));
return FT_THROW( Missing_Property );
}
static FT_Error
af_property_get( FT_Module ft_module,
const char* property_name,
void* value )
{
FT_Error error = FT_Err_Ok;
AF_Module module = (AF_Module)ft_module;
FT_UInt fallback_style = module->fallback_style;
FT_UInt default_script = module->default_script;
if ( !ft_strcmp( property_name, "glyph-to-script-map" ) )
{
FT_Prop_GlyphToScriptMap* prop = (FT_Prop_GlyphToScriptMap*)value;
AF_FaceGlobals globals;
error = af_property_get_face_globals( prop->face, &globals, module );
if ( !error )
prop->map = globals->glyph_styles;
return error;
}
else if ( !ft_strcmp( property_name, "fallback-script" ) )
{
FT_UInt* val = (FT_UInt*)value;
AF_StyleClass style_class = AF_STYLE_CLASSES_GET[fallback_style];
*val = style_class->script;
return error;
}
else if ( !ft_strcmp( property_name, "default-script" ) )
{
FT_UInt* val = (FT_UInt*)value;
*val = default_script;
return error;
}
else if ( !ft_strcmp( property_name, "increase-x-height" ) )
{
FT_Prop_IncreaseXHeight* prop = (FT_Prop_IncreaseXHeight*)value;
AF_FaceGlobals globals;
error = af_property_get_face_globals( prop->face, &globals, module );
if ( !error )
prop->limit = globals->increase_x_height;
return error;
}
FT_TRACE0(( "af_property_get: missing property `%s'\n",
property_name ));
return FT_THROW( Missing_Property );
}
FT_DEFINE_SERVICE_PROPERTIESREC(
af_service_properties,
(FT_Properties_SetFunc)af_property_set,
(FT_Properties_GetFunc)af_property_get )
FT_DEFINE_SERVICEDESCREC1(
af_services,
FT_SERVICE_ID_PROPERTIES, &AF_SERVICE_PROPERTIES_GET )
FT_CALLBACK_DEF( FT_Module_Interface )
af_get_interface( FT_Module module,
const char* module_interface )
{
/* AF_SERVICES_GET dereferences `library' in PIC mode */
#ifdef FT_CONFIG_OPTION_PIC
FT_Library library;
if ( !module )
return NULL;
library = module->library;
if ( !library )
return NULL;
#else
FT_UNUSED( module );
#endif
return ft_service_list_lookup( AF_SERVICES_GET, module_interface );
}
FT_CALLBACK_DEF( FT_Error )
af_autofitter_init( FT_Module ft_module ) /* AF_Module */
{
AF_Module module = (AF_Module)ft_module;
module->fallback_style = AF_STYLE_FALLBACK;
module->default_script = AF_SCRIPT_DEFAULT;
return FT_Err_Ok;
}
FT_CALLBACK_DEF( void )
af_autofitter_done( FT_Module ft_module ) /* AF_Module */
{
FT_UNUSED( ft_module );
}
FT_CALLBACK_DEF( FT_Error )
af_autofitter_load_glyph( AF_Module module,
FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
FT_Error error = FT_Err_Ok;
FT_Memory memory = module->root.library->memory;
AF_GlyphHintsRec hints[1];
AF_LoaderRec loader[1];
FT_UNUSED( size );
af_glyph_hints_init( hints, memory );
af_loader_init( loader, hints );
error = af_loader_load_glyph( loader, module, slot->face,
glyph_index, load_flags );
af_loader_done( loader );
af_glyph_hints_done( hints );
return error;
}
FT_DEFINE_AUTOHINTER_INTERFACE(
af_autofitter_interface,
NULL, /* reset_face */
NULL, /* get_global_hints */
NULL, /* done_global_hints */
(FT_AutoHinter_GlyphLoadFunc)af_autofitter_load_glyph ) /* load_glyph */
FT_DEFINE_MODULE(
autofit_module_class,
FT_MODULE_HINTER,
sizeof ( AF_ModuleRec ),
"autofitter",
0x10000L, /* version 1.0 of the autofitter */
0x20000L, /* requires FreeType 2.0 or above */
(const void*)&AF_INTERFACE_GET,
(FT_Module_Constructor)af_autofitter_init,
(FT_Module_Destructor) af_autofitter_done,
(FT_Module_Requester) af_get_interface )
/* END */