diff -r a501f5ec7b34 -r 0f5961910e27 misc/libfreetype/src/base/ftadvanc.c --- a/misc/libfreetype/src/base/ftadvanc.c Tue Jul 16 11:14:27 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,163 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftadvanc.c */ -/* */ -/* Quick computation of advance widths (body). */ -/* */ -/* Copyright 2008, 2009 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 -#include FT_ADVANCES_H -#include FT_INTERNAL_OBJECTS_H - - - static FT_Error - _ft_face_scale_advances( FT_Face face, - FT_Fixed* advances, - FT_UInt count, - FT_Int32 flags ) - { - FT_Fixed scale; - FT_UInt nn; - - - if ( flags & FT_LOAD_NO_SCALE ) - return FT_Err_Ok; - - if ( face->size == NULL ) - return FT_Err_Invalid_Size_Handle; - - if ( flags & FT_LOAD_VERTICAL_LAYOUT ) - scale = face->size->metrics.y_scale; - else - scale = face->size->metrics.x_scale; - - /* this must be the same scaling as to get linear{Hori,Vert}Advance */ - /* (see `FT_Load_Glyph' implementation in src/base/ftobjs.c) */ - - for ( nn = 0; nn < count; nn++ ) - advances[nn] = FT_MulDiv( advances[nn], scale, 64 ); - - return FT_Err_Ok; - } - - - /* at the moment, we can perform fast advance retrieval only in */ - /* the following cases: */ - /* */ - /* - unscaled load */ - /* - unhinted load */ - /* - light-hinted load */ - -#define LOAD_ADVANCE_FAST_CHECK( flags ) \ - ( flags & ( FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING ) || \ - FT_LOAD_TARGET_MODE( flags ) == FT_RENDER_MODE_LIGHT ) - - - /* documentation is in ftadvanc.h */ - - FT_EXPORT_DEF( FT_Error ) - FT_Get_Advance( FT_Face face, - FT_UInt gindex, - FT_Int32 flags, - FT_Fixed *padvance ) - { - FT_Face_GetAdvancesFunc func; - - - if ( !face ) - return FT_Err_Invalid_Face_Handle; - - if ( gindex >= (FT_UInt)face->num_glyphs ) - return FT_Err_Invalid_Glyph_Index; - - func = face->driver->clazz->get_advances; - if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) ) - { - FT_Error error; - - - error = func( face, gindex, 1, flags, padvance ); - if ( !error ) - return _ft_face_scale_advances( face, padvance, 1, flags ); - - if ( error != FT_ERROR_BASE( FT_Err_Unimplemented_Feature ) ) - return error; - } - - return FT_Get_Advances( face, gindex, 1, flags, padvance ); - } - - - /* documentation is in ftadvanc.h */ - - FT_EXPORT_DEF( FT_Error ) - FT_Get_Advances( FT_Face face, - FT_UInt start, - FT_UInt count, - FT_Int32 flags, - FT_Fixed *padvances ) - { - FT_Face_GetAdvancesFunc func; - FT_UInt num, end, nn; - FT_Error error = FT_Err_Ok; - - - if ( !face ) - return FT_Err_Invalid_Face_Handle; - - num = (FT_UInt)face->num_glyphs; - end = start + count; - if ( start >= num || end < start || end > num ) - return FT_Err_Invalid_Glyph_Index; - - if ( count == 0 ) - return FT_Err_Ok; - - func = face->driver->clazz->get_advances; - if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) ) - { - error = func( face, start, count, flags, padvances ); - if ( !error ) - goto Exit; - - if ( error != FT_ERROR_BASE( FT_Err_Unimplemented_Feature ) ) - return error; - } - - error = FT_Err_Ok; - - if ( flags & FT_ADVANCE_FLAG_FAST_ONLY ) - return FT_Err_Unimplemented_Feature; - - flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY; - for ( nn = 0; nn < count; nn++ ) - { - error = FT_Load_Glyph( face, start + nn, flags ); - if ( error ) - break; - - padvances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT ) - ? face->glyph->advance.y - : face->glyph->advance.x; - } - - if ( error ) - return error; - - Exit: - return _ft_face_scale_advances( face, padvances, count, flags ); - } - - -/* END */