?? ttinterp.c
字號:
static FT_Long Current_Ppem( EXEC_OP ) { return TT_MULFIX( CUR.tt_metrics.ppem, CURRENT_Ratio() ); } /*************************************************************************/ /* */ /* Functions related to the control value table (CVT). */ /* */ /*************************************************************************/ FT_CALLBACK_DEF( FT_F26Dot6 ) Read_CVT( EXEC_OP_ FT_ULong idx ) { return CUR.cvt[idx]; } FT_CALLBACK_DEF( FT_F26Dot6 ) Read_CVT_Stretched( EXEC_OP_ FT_ULong idx ) { return TT_MULFIX( CUR.cvt[idx], CURRENT_Ratio() ); } FT_CALLBACK_DEF( void ) Write_CVT( EXEC_OP_ FT_ULong idx, FT_F26Dot6 value ) { CUR.cvt[idx] = value; } FT_CALLBACK_DEF( void ) Write_CVT_Stretched( EXEC_OP_ FT_ULong idx, FT_F26Dot6 value ) { CUR.cvt[idx] = FT_DivFix( value, CURRENT_Ratio() ); } FT_CALLBACK_DEF( void ) Move_CVT( EXEC_OP_ FT_ULong idx, FT_F26Dot6 value ) { CUR.cvt[idx] += value; } FT_CALLBACK_DEF( void ) Move_CVT_Stretched( EXEC_OP_ FT_ULong idx, FT_F26Dot6 value ) { CUR.cvt[idx] += FT_DivFix( value, CURRENT_Ratio() ); } /*************************************************************************/ /* */ /* <Function> */ /* GetShortIns */ /* */ /* <Description> */ /* Returns a short integer taken from the instruction stream at */ /* address IP. */ /* */ /* <Return> */ /* Short read at code[IP]. */ /* */ /* <Note> */ /* This one could become a macro. */ /* */ static FT_Short GetShortIns( EXEC_OP ) { /* Reading a byte stream so there is no endianess (DaveP) */ CUR.IP += 2; return (FT_Short)( ( CUR.code[CUR.IP - 2] << 8 ) + CUR.code[CUR.IP - 1] ); } /*************************************************************************/ /* */ /* <Function> */ /* Ins_Goto_CodeRange */ /* */ /* <Description> */ /* Goes to a certain code range in the instruction stream. */ /* */ /* <Input> */ /* aRange :: The index of the code range. */ /* */ /* aIP :: The new IP address in the code range. */ /* */ /* <Return> */ /* SUCCESS or FAILURE. */ /* */ static FT_Bool Ins_Goto_CodeRange( EXEC_OP_ FT_Int aRange, FT_ULong aIP ) { TT_CodeRange* range; if ( aRange < 1 || aRange > 3 ) { CUR.error = TT_Err_Bad_Argument; return FAILURE; } range = &CUR.codeRangeTable[aRange - 1]; if ( range->base == NULL ) /* invalid coderange */ { CUR.error = TT_Err_Invalid_CodeRange; return FAILURE; } /* NOTE: Because the last instruction of a program may be a CALL */ /* which will return to the first byte *after* the code */ /* range, we test for AIP <= Size, instead of AIP < Size. */ if ( aIP > range->size ) { CUR.error = TT_Err_Code_Overflow; return FAILURE; } CUR.code = range->base; CUR.codeSize = range->size; CUR.IP = aIP; CUR.curRange = aRange; return SUCCESS; } /*************************************************************************/ /* */ /* <Function> */ /* Direct_Move */ /* */ /* <Description> */ /* Moves a point by a given distance along the freedom vector. The */ /* point will be `touched'. */ /* */ /* <Input> */ /* point :: The index of the point to move. */ /* */ /* distance :: The distance to apply. */ /* */ /* <InOut> */ /* zone :: The affected glyph zone. */ /* */ static void Direct_Move( EXEC_OP_ TT_GlyphZone zone, FT_UShort point, FT_F26Dot6 distance ) { FT_F26Dot6 v; v = CUR.GS.freeVector.x; if ( v != 0 ) {#ifdef NO_APPLE_PATENT if ( ABS( CUR.F_dot_P ) > APPLE_THRESHOLD ) zone->cur[point].x += distance;#else zone->cur[point].x += TT_MULDIV( distance, v * 0x10000L, CUR.F_dot_P );#endif zone->tags[point] |= FT_Curve_Tag_Touch_X; } v = CUR.GS.freeVector.y; if ( v != 0 ) {#ifdef NO_APPLE_PATENT if ( ABS( CUR.F_dot_P ) > APPLE_THRESHOLD ) zone->cur[point].y += distance;#else zone->cur[point].y += TT_MULDIV( distance, v * 0x10000L, CUR.F_dot_P );#endif zone->tags[point] |= FT_Curve_Tag_Touch_Y; } } /*************************************************************************/ /* */ /* Special versions of Direct_Move() */ /* */ /* The following versions are used whenever both vectors are both */ /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */ /* */ /*************************************************************************/ static void Direct_Move_X( EXEC_OP_ TT_GlyphZone zone, FT_UShort point, FT_F26Dot6 distance ) { FT_UNUSED_EXEC; zone->cur[point].x += distance; zone->tags[point] |= FT_Curve_Tag_Touch_X; } static void Direct_Move_Y( EXEC_OP_ TT_GlyphZone zone, FT_UShort point, FT_F26Dot6 distance ) { FT_UNUSED_EXEC; zone->cur[point].y += distance; zone->tags[point] |= FT_Curve_Tag_Touch_Y; } /*************************************************************************/ /* */ /* <Function> */ /* Round_None */ /* */ /* <Description> */ /* Does not round, but adds engine compensation. */ /* */ /* <Input> */ /* distance :: The distance (not) to round. */ /* */ /* compensation :: The engine compensation. */ /* */ /* <Return> */ /* The compensated distance. */ /* */ /* <Note> */ /* The TrueType specification says very few about the relationship */ /* between rounding and engine compensation. However, it seems from */ /* the description of super round that we should add the compensation */ /* before rounding. */ /* */ static FT_F26Dot6 Round_None( EXEC_OP_ FT_F26Dot6 distance, FT_F26Dot6 compensation ) { FT_F26Dot6 val; FT_UNUSED_EXEC; if ( distance >= 0 ) { val = distance + compensation; if ( val < 0 ) val = 0; } else { val = distance - compensation; if ( val > 0 ) val = 0; } return val; } /*************************************************************************/ /* */ /* <Function> */ /* Round_To_Grid */ /* */ /* <Description> */ /* Rounds value to grid after adding engine compensation. */ /* */ /* <Input> */ /* distance :: The distance to round. */ /* */ /* compensation :: The engine compensation. */ /* */ /* <Return> */ /* Rounded distance. */ /* */ static FT_F26Dot6 Round_To_Grid( EXEC_OP_ FT_F26Dot6 distance, FT_F26Dot6 compensation ) { FT_F26Dot6 val; FT_UNUSED_EXEC; if ( distance >= 0 ) { val = distance + compensation + 32; if ( val > 0 ) val &= ~63; else val = 0; } else { val = -( ( compensation - distance + 32 ) & -64 ); if ( val > 0 ) val = 0; } return val; } /*************************************************************************/ /* */ /* <Function> */ /* Round_To_Half_Grid ?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -