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1 /***************************************************************************/ |
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2 /* */ |
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3 /* gxvmorx0.c */ |
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4 /* */ |
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5 /* TrueTypeGX/AAT morx table validation */ |
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6 /* body for type0 (Indic Script Rearrangement) subtable. */ |
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7 /* */ |
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8 /* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */ |
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9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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10 /* */ |
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11 /* This file is part of the FreeType project, and may only be used, */ |
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12 /* modified, and distributed under the terms of the FreeType project */ |
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13 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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14 /* this file you indicate that you have read the license and */ |
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15 /* understand and accept it fully. */ |
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16 /* */ |
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17 /***************************************************************************/ |
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18 |
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19 /***************************************************************************/ |
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20 /* */ |
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21 /* gxvalid is derived from both gxlayout module and otvalid module. */ |
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22 /* Development of gxlayout is supported by the Information-technology */ |
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23 /* Promotion Agency(IPA), Japan. */ |
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24 /* */ |
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25 /***************************************************************************/ |
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26 |
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27 |
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28 #include "gxvmorx.h" |
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29 |
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30 |
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31 /*************************************************************************/ |
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32 /* */ |
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33 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
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34 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
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35 /* messages during execution. */ |
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36 /* */ |
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37 #undef FT_COMPONENT |
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38 #define FT_COMPONENT trace_gxvmorx |
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39 |
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40 |
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41 static void |
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42 gxv_morx_subtable_type0_entry_validate( |
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43 FT_UShort state, |
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44 FT_UShort flags, |
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45 GXV_XStateTable_GlyphOffsetCPtr glyphOffset_p, |
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46 FT_Bytes table, |
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47 FT_Bytes limit, |
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48 GXV_Validator valid ) |
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49 { |
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50 FT_UShort markFirst; |
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51 FT_UShort dontAdvance; |
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52 FT_UShort markLast; |
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53 FT_UShort reserved; |
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54 FT_UShort verb; |
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55 |
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56 FT_UNUSED( state ); |
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57 FT_UNUSED( glyphOffset_p ); |
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58 FT_UNUSED( table ); |
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59 FT_UNUSED( limit ); |
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60 |
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61 |
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62 markFirst = (FT_UShort)( ( flags >> 15 ) & 1 ); |
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63 dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); |
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64 markLast = (FT_UShort)( ( flags >> 13 ) & 1 ); |
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65 |
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66 reserved = (FT_UShort)( flags & 0x1FF0 ); |
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67 verb = (FT_UShort)( flags & 0x000F ); |
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68 |
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69 if ( 0 < reserved ) |
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70 { |
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71 GXV_TRACE(( " non-zero bits found in reserved range\n" )); |
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72 FT_INVALID_DATA; |
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73 } |
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74 } |
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75 |
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76 |
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77 FT_LOCAL_DEF( void ) |
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78 gxv_morx_subtable_type0_validate( FT_Bytes table, |
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79 FT_Bytes limit, |
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80 GXV_Validator valid ) |
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81 { |
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82 FT_Bytes p = table; |
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83 |
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84 |
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85 GXV_NAME_ENTER( |
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86 "morx chain subtable type0 (Indic-Script Rearrangement)" ); |
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87 |
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88 GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE ); |
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89 |
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90 valid->xstatetable.optdata = NULL; |
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91 valid->xstatetable.optdata_load_func = NULL; |
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92 valid->xstatetable.subtable_setup_func = NULL; |
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93 valid->xstatetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE; |
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94 valid->xstatetable.entry_validate_func = |
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95 gxv_morx_subtable_type0_entry_validate; |
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96 |
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97 gxv_XStateTable_validate( p, limit, valid ); |
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98 |
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99 GXV_EXIT; |
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100 } |
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101 |
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102 |
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103 /* END */ |