| /***************************************************************************/ |
| /* */ |
| /* cf2intrp.c */ |
| /* */ |
| /* Adobe's CFF Interpreter (body). */ |
| /* */ |
| /* Copyright 2007-2014 Adobe Systems Incorporated. */ |
| /* */ |
| /* This software, and all works of authorship, whether in source or */ |
| /* object code form as indicated by the copyright notice(s) included */ |
| /* herein (collectively, the "Work") is made available, and may only be */ |
| /* used, modified, and distributed under the FreeType Project License, */ |
| /* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ |
| /* FreeType Project License, each contributor to the Work hereby grants */ |
| /* to any individual or legal entity exercising permissions granted by */ |
| /* the FreeType Project License and this section (hereafter, "You" or */ |
| /* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ |
| /* royalty-free, irrevocable (except as stated in this section) patent */ |
| /* license to make, have made, use, offer to sell, sell, import, and */ |
| /* otherwise transfer the Work, where such license applies only to those */ |
| /* patent claims licensable by such contributor that are necessarily */ |
| /* infringed by their contribution(s) alone or by combination of their */ |
| /* contribution(s) with the Work to which such contribution(s) was */ |
| /* submitted. If You institute patent litigation against any entity */ |
| /* (including a cross-claim or counterclaim in a lawsuit) alleging that */ |
| /* the Work or a contribution incorporated within the Work constitutes */ |
| /* direct or contributory patent infringement, then any patent licenses */ |
| /* granted to You under this License for that Work shall terminate as of */ |
| /* the date such litigation is filed. */ |
| /* */ |
| /* By using, modifying, or distributing the Work you indicate that you */ |
| /* have read and understood the terms and conditions of the */ |
| /* FreeType Project License as well as those provided in this section, */ |
| /* and you accept them fully. */ |
| /* */ |
| /***************************************************************************/ |
| |
| |
| #include "cf2ft.h" |
| #include FT_INTERNAL_DEBUG_H |
| |
| #include "cf2glue.h" |
| #include "cf2font.h" |
| #include "cf2stack.h" |
| #include "cf2hints.h" |
| #include "cf2intrp.h" |
| |
| #include "cf2error.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_cf2interp |
| |
| |
| /* some operators are not implemented yet */ |
| #define CF2_FIXME FT_TRACE4(( "cf2_interpT2CharString:" \ |
| " operator not implemented yet\n" )) |
| |
| |
| |
| FT_LOCAL_DEF( void ) |
| cf2_hintmask_init( CF2_HintMask hintmask, |
| FT_Error* error ) |
| { |
| FT_ZERO( hintmask ); |
| |
| hintmask->error = error; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Bool ) |
| cf2_hintmask_isValid( const CF2_HintMask hintmask ) |
| { |
| return hintmask->isValid; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Bool ) |
| cf2_hintmask_isNew( const CF2_HintMask hintmask ) |
| { |
| return hintmask->isNew; |
| } |
| |
| |
| FT_LOCAL_DEF( void ) |
| cf2_hintmask_setNew( CF2_HintMask hintmask, |
| FT_Bool val ) |
| { |
| hintmask->isNew = val; |
| } |
| |
| |
| /* clients call `getMaskPtr' in order to iterate */ |
| /* through hint mask */ |
| |
| FT_LOCAL_DEF( FT_Byte* ) |
| cf2_hintmask_getMaskPtr( CF2_HintMask hintmask ) |
| { |
| return hintmask->mask; |
| } |
| |
| |
| static size_t |
| cf2_hintmask_setCounts( CF2_HintMask hintmask, |
| size_t bitCount ) |
| { |
| if ( bitCount > CF2_MAX_HINTS ) |
| { |
| /* total of h and v stems must be <= 96 */ |
| CF2_SET_ERROR( hintmask->error, Invalid_Glyph_Format ); |
| return 0; |
| } |
| |
| hintmask->bitCount = bitCount; |
| hintmask->byteCount = ( hintmask->bitCount + 7 ) / 8; |
| |
| hintmask->isValid = TRUE; |
| hintmask->isNew = TRUE; |
| |
| return bitCount; |
| } |
| |
| |
| /* consume the hintmask bytes from the charstring, advancing the src */ |
| /* pointer */ |
| static void |
| cf2_hintmask_read( CF2_HintMask hintmask, |
| CF2_Buffer charstring, |
| size_t bitCount ) |
| { |
| size_t i; |
| |
| #ifndef CF2_NDEBUG |
| /* these are the bits in the final mask byte that should be zero */ |
| /* Note: this variable is only used in an assert expression below */ |
| /* and then only if CF2_NDEBUG is not defined */ |
| CF2_UInt mask = ( 1 << ( -(CF2_Int)bitCount & 7 ) ) - 1; |
| #endif |
| |
| |
| /* initialize counts and isValid */ |
| if ( cf2_hintmask_setCounts( hintmask, bitCount ) == 0 ) |
| return; |
| |
| FT_ASSERT( hintmask->byteCount > 0 ); |
| |
| FT_TRACE4(( " (maskbytes:" )); |
| |
| /* set mask and advance interpreter's charstring pointer */ |
| for ( i = 0; i < hintmask->byteCount; i++ ) |
| { |
| hintmask->mask[i] = (FT_Byte)cf2_buf_readByte( charstring ); |
| FT_TRACE4(( " 0x%02X", hintmask->mask[i] )); |
| } |
| |
| FT_TRACE4(( ")\n" )); |
| |
| /* assert any unused bits in last byte are zero unless there's a prior */ |
| /* error */ |
| /* bitCount -> mask, 0 -> 0, 1 -> 7f, 2 -> 3f, ... 6 -> 3, 7 -> 1 */ |
| #ifndef CF2_NDEBUG |
| FT_ASSERT( ( hintmask->mask[hintmask->byteCount - 1] & mask ) == 0 || |
| *hintmask->error ); |
| #endif |
| } |
| |
| |
| FT_LOCAL_DEF( void ) |
| cf2_hintmask_setAll( CF2_HintMask hintmask, |
| size_t bitCount ) |
| { |
| size_t i; |
| CF2_UInt mask = ( 1 << ( -(CF2_Int)bitCount & 7 ) ) - 1; |
| |
| |
| /* initialize counts and isValid */ |
| if ( cf2_hintmask_setCounts( hintmask, bitCount ) == 0 ) |
| return; |
| |
| FT_ASSERT( hintmask->byteCount > 0 ); |
| FT_ASSERT( hintmask->byteCount < |
| sizeof ( hintmask->mask ) / sizeof ( hintmask->mask[0] ) ); |
| |
| /* set mask to all ones */ |
| for ( i = 0; i < hintmask->byteCount; i++ ) |
| hintmask->mask[i] = 0xFF; |
| |
| /* clear unused bits */ |
| /* bitCount -> mask, 0 -> 0, 1 -> 7f, 2 -> 3f, ... 6 -> 3, 7 -> 1 */ |
| hintmask->mask[hintmask->byteCount - 1] &= ~mask; |
| } |
| |
| |
| /* Type2 charstring opcodes */ |
| enum |
| { |
| cf2_cmdRESERVED_0, /* 0 */ |
| cf2_cmdHSTEM, /* 1 */ |
| cf2_cmdRESERVED_2, /* 2 */ |
| cf2_cmdVSTEM, /* 3 */ |
| cf2_cmdVMOVETO, /* 4 */ |
| cf2_cmdRLINETO, /* 5 */ |
| cf2_cmdHLINETO, /* 6 */ |
| cf2_cmdVLINETO, /* 7 */ |
| cf2_cmdRRCURVETO, /* 8 */ |
| cf2_cmdRESERVED_9, /* 9 */ |
| cf2_cmdCALLSUBR, /* 10 */ |
| cf2_cmdRETURN, /* 11 */ |
| cf2_cmdESC, /* 12 */ |
| cf2_cmdRESERVED_13, /* 13 */ |
| cf2_cmdENDCHAR, /* 14 */ |
| cf2_cmdRESERVED_15, /* 15 */ |
| cf2_cmdRESERVED_16, /* 16 */ |
| cf2_cmdRESERVED_17, /* 17 */ |
| cf2_cmdHSTEMHM, /* 18 */ |
| cf2_cmdHINTMASK, /* 19 */ |
| cf2_cmdCNTRMASK, /* 20 */ |
| cf2_cmdRMOVETO, /* 21 */ |
| cf2_cmdHMOVETO, /* 22 */ |
| cf2_cmdVSTEMHM, /* 23 */ |
| cf2_cmdRCURVELINE, /* 24 */ |
| cf2_cmdRLINECURVE, /* 25 */ |
| cf2_cmdVVCURVETO, /* 26 */ |
| cf2_cmdHHCURVETO, /* 27 */ |
| cf2_cmdEXTENDEDNMBR, /* 28 */ |
| cf2_cmdCALLGSUBR, /* 29 */ |
| cf2_cmdVHCURVETO, /* 30 */ |
| cf2_cmdHVCURVETO /* 31 */ |
| }; |
| |
| enum |
| { |
| cf2_escDOTSECTION, /* 0 */ |
| cf2_escRESERVED_1, /* 1 */ |
| cf2_escRESERVED_2, /* 2 */ |
| cf2_escAND, /* 3 */ |
| cf2_escOR, /* 4 */ |
| cf2_escNOT, /* 5 */ |
| cf2_escRESERVED_6, /* 6 */ |
| cf2_escRESERVED_7, /* 7 */ |
| cf2_escRESERVED_8, /* 8 */ |
| cf2_escABS, /* 9 */ |
| cf2_escADD, /* 10 like otherADD */ |
| cf2_escSUB, /* 11 like otherSUB */ |
| cf2_escDIV, /* 12 */ |
| cf2_escRESERVED_13, /* 13 */ |
| cf2_escNEG, /* 14 */ |
| cf2_escEQ, /* 15 */ |
| cf2_escRESERVED_16, /* 16 */ |
| cf2_escRESERVED_17, /* 17 */ |
| cf2_escDROP, /* 18 */ |
| cf2_escRESERVED_19, /* 19 */ |
| cf2_escPUT, /* 20 like otherPUT */ |
| cf2_escGET, /* 21 like otherGET */ |
| cf2_escIFELSE, /* 22 like otherIFELSE */ |
| cf2_escRANDOM, /* 23 like otherRANDOM */ |
| cf2_escMUL, /* 24 like otherMUL */ |
| cf2_escRESERVED_25, /* 25 */ |
| cf2_escSQRT, /* 26 */ |
| cf2_escDUP, /* 27 like otherDUP */ |
| cf2_escEXCH, /* 28 like otherEXCH */ |
| cf2_escINDEX, /* 29 */ |
| cf2_escROLL, /* 30 */ |
| cf2_escRESERVED_31, /* 31 */ |
| cf2_escRESERVED_32, /* 32 */ |
| cf2_escRESERVED_33, /* 33 */ |
| cf2_escHFLEX, /* 34 */ |
| cf2_escFLEX, /* 35 */ |
| cf2_escHFLEX1, /* 36 */ |
| cf2_escFLEX1 /* 37 */ |
| }; |
| |
| |
| /* `stemHintArray' does not change once we start drawing the outline. */ |
| static void |
| cf2_doStems( const CF2_Font font, |
| CF2_Stack opStack, |
| CF2_ArrStack stemHintArray, |
| CF2_Fixed* width, |
| FT_Bool* haveWidth, |
| CF2_Fixed hintOffset ) |
| { |
| CF2_UInt i; |
| CF2_UInt count = cf2_stack_count( opStack ); |
| FT_Bool hasWidthArg = (FT_Bool)( count & 1 ); |
| |
| /* variable accumulates delta values from operand stack */ |
| CF2_Fixed position = hintOffset; |
| |
| if ( hasWidthArg && ! *haveWidth ) |
| *width = cf2_stack_getReal( opStack, 0 ) + |
| cf2_getNominalWidthX( font->decoder ); |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| for ( i = hasWidthArg ? 1 : 0; i < count; i += 2 ) |
| { |
| /* construct a CF2_StemHint and push it onto the list */ |
| CF2_StemHintRec stemhint; |
| |
| |
| stemhint.min = |
| position += cf2_stack_getReal( opStack, i ); |
| stemhint.max = |
| position += cf2_stack_getReal( opStack, i + 1 ); |
| |
| stemhint.used = FALSE; |
| stemhint.maxDS = |
| stemhint.minDS = 0; |
| |
| cf2_arrstack_push( stemHintArray, &stemhint ); /* defer error check */ |
| } |
| |
| cf2_stack_clear( opStack ); |
| |
| exit: |
| /* cf2_doStems must define a width (may be default) */ |
| *haveWidth = TRUE; |
| } |
| |
| |
| static void |
| cf2_doFlex( CF2_Stack opStack, |
| CF2_Fixed* curX, |
| CF2_Fixed* curY, |
| CF2_GlyphPath glyphPath, |
| const FT_Bool* readFromStack, |
| FT_Bool doConditionalLastRead ) |
| { |
| CF2_Fixed vals[14]; |
| CF2_UInt index; |
| FT_Bool isHFlex; |
| CF2_Int top, i, j; |
| |
| |
| vals[0] = *curX; |
| vals[1] = *curY; |
| index = 0; |
| isHFlex = readFromStack[9] == FALSE; |
| top = isHFlex ? 9 : 10; |
| |
| for ( i = 0; i < top; i++ ) |
| { |
| vals[i + 2] = vals[i]; |
| if ( readFromStack[i] ) |
| vals[i + 2] += cf2_stack_getReal( opStack, index++ ); |
| } |
| |
| if ( isHFlex ) |
| vals[9 + 2] = *curY; |
| |
| if ( doConditionalLastRead ) |
| { |
| FT_Bool lastIsX = (FT_Bool)( cf2_fixedAbs( vals[10] - *curX ) > |
| cf2_fixedAbs( vals[11] - *curY ) ); |
| CF2_Fixed lastVal = cf2_stack_getReal( opStack, index ); |
| |
| |
| if ( lastIsX ) |
| { |
| vals[12] = vals[10] + lastVal; |
| vals[13] = *curY; |
| } |
| else |
| { |
| vals[12] = *curX; |
| vals[13] = vals[11] + lastVal; |
| } |
| } |
| else |
| { |
| if ( readFromStack[10] ) |
| vals[12] = vals[10] + cf2_stack_getReal( opStack, index++ ); |
| else |
| vals[12] = *curX; |
| |
| if ( readFromStack[11] ) |
| vals[13] = vals[11] + cf2_stack_getReal( opStack, index ); |
| else |
| vals[13] = *curY; |
| } |
| |
| for ( j = 0; j < 2; j++ ) |
| cf2_glyphpath_curveTo( glyphPath, vals[j * 6 + 2], |
| vals[j * 6 + 3], |
| vals[j * 6 + 4], |
| vals[j * 6 + 5], |
| vals[j * 6 + 6], |
| vals[j * 6 + 7] ); |
| |
| cf2_stack_clear( opStack ); |
| |
| *curX = vals[12]; |
| *curY = vals[13]; |
| } |
| |
| |
| /* |
| * `error' is a shared error code used by many objects in this |
| * routine. Before the code continues from an error, it must check and |
| * record the error in `*error'. The idea is that this shared |
| * error code will record the first error encountered. If testing |
| * for an error anyway, the cost of `goto exit' is small, so we do it, |
| * even if continuing would be safe. In this case, `lastError' is |
| * set, so the testing and storing can be done in one place, at `exit'. |
| * |
| * Continuing after an error is intended for objects which do their own |
| * testing of `*error', e.g., array stack functions. This allows us to |
| * avoid an extra test after the call. |
| * |
| * Unimplemented opcodes are ignored. |
| * |
| */ |
| FT_LOCAL_DEF( void ) |
| cf2_interpT2CharString( CF2_Font font, |
| CF2_Buffer buf, |
| CF2_OutlineCallbacks callbacks, |
| const FT_Vector* translation, |
| FT_Bool doingSeac, |
| CF2_Fixed curX, |
| CF2_Fixed curY, |
| CF2_Fixed* width ) |
| { |
| /* lastError is used for errors that are immediately tested */ |
| FT_Error lastError = FT_Err_Ok; |
| |
| /* pointer to parsed font object */ |
| CFF_Decoder* decoder = font->decoder; |
| |
| FT_Error* error = &font->error; |
| FT_Memory memory = font->memory; |
| |
| CF2_Fixed scaleY = font->innerTransform.d; |
| CF2_Fixed nominalWidthX = cf2_getNominalWidthX( decoder ); |
| |
| /* save this for hinting seac accents */ |
| CF2_Fixed hintOriginY = curY; |
| |
| CF2_Stack opStack = NULL; |
| FT_Byte op1; /* first opcode byte */ |
| |
| /* instruction limit; 20,000,000 matches Avalon */ |
| FT_UInt32 instructionLimit = 20000000UL; |
| |
| CF2_ArrStackRec subrStack; |
| |
| FT_Bool haveWidth; |
| CF2_Buffer charstring = NULL; |
| |
| CF2_Int charstringIndex = -1; /* initialize to empty */ |
| |
| /* TODO: placeholders for hint structures */ |
| |
| /* objects used for hinting */ |
| CF2_ArrStackRec hStemHintArray; |
| CF2_ArrStackRec vStemHintArray; |
| |
| CF2_HintMaskRec hintMask; |
| CF2_GlyphPathRec glyphPath; |
| |
| |
| /* initialize the remaining objects */ |
| cf2_arrstack_init( &subrStack, |
| memory, |
| error, |
| sizeof ( CF2_BufferRec ) ); |
| cf2_arrstack_init( &hStemHintArray, |
| memory, |
| error, |
| sizeof ( CF2_StemHintRec ) ); |
| cf2_arrstack_init( &vStemHintArray, |
| memory, |
| error, |
| sizeof ( CF2_StemHintRec ) ); |
| |
| /* initialize CF2_StemHint arrays */ |
| cf2_hintmask_init( &hintMask, error ); |
| |
| /* initialize path map to manage drawing operations */ |
| |
| /* Note: last 4 params are used to handle `MoveToPermissive', which */ |
| /* may need to call `hintMap.Build' */ |
| /* TODO: MoveToPermissive is gone; are these still needed? */ |
| cf2_glyphpath_init( &glyphPath, |
| font, |
| callbacks, |
| scaleY, |
| /* hShift, */ |
| &hStemHintArray, |
| &vStemHintArray, |
| &hintMask, |
| hintOriginY, |
| &font->blues, |
| translation ); |
| |
| /* |
| * Initialize state for width parsing. From the CFF Spec: |
| * |
| * The first stack-clearing operator, which must be one of hstem, |
| * hstemhm, vstem, vstemhm, cntrmask, hintmask, hmoveto, vmoveto, |
| * rmoveto, or endchar, takes an additional argument - the width (as |
| * described earlier), which may be expressed as zero or one numeric |
| * argument. |
| * |
| * What we implement here uses the first validly specified width, but |
| * does not detect errors for specifying more than one width. |
| * |
| * If one of the above operators occurs without explicitly specifying |
| * a width, we assume the default width. |
| * |
| */ |
| haveWidth = FALSE; |
| *width = cf2_getDefaultWidthX( decoder ); |
| |
| /* |
| * Note: at this point, all pointers to resources must be NULL |
| * and all local objects must be initialized. |
| * There must be no branches to exit: above this point. |
| * |
| */ |
| |
| /* allocate an operand stack */ |
| opStack = cf2_stack_init( memory, error ); |
| if ( !opStack ) |
| { |
| lastError = FT_THROW( Out_Of_Memory ); |
| goto exit; |
| } |
| |
| /* initialize subroutine stack by placing top level charstring as */ |
| /* first element (max depth plus one for the charstring) */ |
| /* Note: Caller owns and must finalize the first charstring. */ |
| /* Our copy of it does not change that requirement. */ |
| cf2_arrstack_setCount( &subrStack, CF2_MAX_SUBR + 1 ); |
| |
| charstring = (CF2_Buffer)cf2_arrstack_getBuffer( &subrStack ); |
| *charstring = *buf; /* structure copy */ |
| |
| charstringIndex = 0; /* entry is valid now */ |
| |
| /* catch errors so far */ |
| if ( *error ) |
| goto exit; |
| |
| /* main interpreter loop */ |
| while ( 1 ) |
| { |
| if ( cf2_buf_isEnd( charstring ) ) |
| { |
| /* If we've reached the end of the charstring, simulate a */ |
| /* cf2_cmdRETURN or cf2_cmdENDCHAR. */ |
| if ( charstringIndex ) |
| op1 = cf2_cmdRETURN; /* end of buffer for subroutine */ |
| else |
| op1 = cf2_cmdENDCHAR; /* end of buffer for top level charstring */ |
| } |
| else |
| op1 = (FT_Byte)cf2_buf_readByte( charstring ); |
| |
| /* check for errors once per loop */ |
| if ( *error ) |
| goto exit; |
| |
| instructionLimit--; |
| if ( instructionLimit == 0 ) |
| { |
| lastError = FT_THROW( Invalid_Glyph_Format ); |
| goto exit; |
| } |
| |
| switch( op1 ) |
| { |
| case cf2_cmdRESERVED_0: |
| case cf2_cmdRESERVED_2: |
| case cf2_cmdRESERVED_9: |
| case cf2_cmdRESERVED_13: |
| case cf2_cmdRESERVED_15: |
| case cf2_cmdRESERVED_16: |
| case cf2_cmdRESERVED_17: |
| /* we may get here if we have a prior error */ |
| FT_TRACE4(( " unknown op (%d)\n", op1 )); |
| break; |
| |
| case cf2_cmdHSTEMHM: |
| case cf2_cmdHSTEM: |
| FT_TRACE4(( op1 == cf2_cmdHSTEMHM ? " hstemhm\n" : " hstem\n" )); |
| |
| /* never add hints after the mask is computed */ |
| if ( cf2_hintmask_isValid( &hintMask ) ) |
| { |
| FT_TRACE4(( "cf2_interpT2CharString:" |
| " invalid horizontal hint mask\n" )); |
| break; |
| } |
| |
| cf2_doStems( font, |
| opStack, |
| &hStemHintArray, |
| width, |
| &haveWidth, |
| 0 ); |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| break; |
| |
| case cf2_cmdVSTEMHM: |
| case cf2_cmdVSTEM: |
| FT_TRACE4(( op1 == cf2_cmdVSTEMHM ? " vstemhm\n" : " vstem\n" )); |
| |
| /* never add hints after the mask is computed */ |
| if ( cf2_hintmask_isValid( &hintMask ) ) |
| { |
| FT_TRACE4(( "cf2_interpT2CharString:" |
| " invalid vertical hint mask\n" )); |
| break; |
| } |
| |
| cf2_doStems( font, |
| opStack, |
| &vStemHintArray, |
| width, |
| &haveWidth, |
| 0 ); |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| break; |
| |
| case cf2_cmdVMOVETO: |
| FT_TRACE4(( " vmoveto\n" )); |
| |
| if ( cf2_stack_count( opStack ) > 1 && !haveWidth ) |
| *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; |
| |
| /* width is defined or default after this */ |
| haveWidth = TRUE; |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| curY += cf2_stack_popFixed( opStack ); |
| |
| cf2_glyphpath_moveTo( &glyphPath, curX, curY ); |
| |
| break; |
| |
| case cf2_cmdRLINETO: |
| { |
| CF2_UInt index; |
| CF2_UInt count = cf2_stack_count( opStack ); |
| |
| |
| FT_TRACE4(( " rlineto\n" )); |
| |
| for ( index = 0; index < count; index += 2 ) |
| { |
| curX += cf2_stack_getReal( opStack, index + 0 ); |
| curY += cf2_stack_getReal( opStack, index + 1 ); |
| |
| cf2_glyphpath_lineTo( &glyphPath, curX, curY ); |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; /* no need to clear stack again */ |
| |
| case cf2_cmdHLINETO: |
| case cf2_cmdVLINETO: |
| { |
| CF2_UInt index; |
| CF2_UInt count = cf2_stack_count( opStack ); |
| |
| FT_Bool isX = op1 == cf2_cmdHLINETO; |
| |
| |
| FT_TRACE4(( isX ? " hlineto\n" : " vlineto\n" )); |
| |
| for ( index = 0; index < count; index++ ) |
| { |
| CF2_Fixed v = cf2_stack_getReal( opStack, index ); |
| |
| |
| if ( isX ) |
| curX += v; |
| else |
| curY += v; |
| |
| isX = !isX; |
| |
| cf2_glyphpath_lineTo( &glyphPath, curX, curY ); |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; |
| |
| case cf2_cmdRCURVELINE: |
| case cf2_cmdRRCURVETO: |
| { |
| CF2_UInt count = cf2_stack_count( opStack ); |
| CF2_UInt index = 0; |
| |
| |
| FT_TRACE4(( op1 == cf2_cmdRCURVELINE ? " rcurveline\n" |
| : " rrcurveto\n" )); |
| |
| while ( index + 6 <= count ) |
| { |
| CF2_Fixed x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; |
| CF2_Fixed y1 = cf2_stack_getReal( opStack, index + 1 ) + curY; |
| CF2_Fixed x2 = cf2_stack_getReal( opStack, index + 2 ) + x1; |
| CF2_Fixed y2 = cf2_stack_getReal( opStack, index + 3 ) + y1; |
| CF2_Fixed x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; |
| CF2_Fixed y3 = cf2_stack_getReal( opStack, index + 5 ) + y2; |
| |
| |
| cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); |
| |
| curX = x3; |
| curY = y3; |
| index += 6; |
| } |
| |
| if ( op1 == cf2_cmdRCURVELINE ) |
| { |
| curX += cf2_stack_getReal( opStack, index + 0 ); |
| curY += cf2_stack_getReal( opStack, index + 1 ); |
| |
| cf2_glyphpath_lineTo( &glyphPath, curX, curY ); |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; /* no need to clear stack again */ |
| |
| case cf2_cmdCALLGSUBR: |
| case cf2_cmdCALLSUBR: |
| { |
| CF2_UInt subrIndex; |
| |
| |
| FT_TRACE4(( op1 == cf2_cmdCALLGSUBR ? " callgsubr" |
| : " callsubr" )); |
| |
| if ( charstringIndex > CF2_MAX_SUBR ) |
| { |
| /* max subr plus one for charstring */ |
| lastError = FT_THROW( Invalid_Glyph_Format ); |
| goto exit; /* overflow of stack */ |
| } |
| |
| /* push our current CFF charstring region on subrStack */ |
| charstring = (CF2_Buffer) |
| cf2_arrstack_getPointer( |
| &subrStack, |
| (size_t)charstringIndex + 1 ); |
| |
| /* set up the new CFF region and pointer */ |
| subrIndex = (CF2_UInt)cf2_stack_popInt( opStack ); |
| |
| switch ( op1 ) |
| { |
| case cf2_cmdCALLGSUBR: |
| FT_TRACE4(( " (idx %d, entering level %d)\n", |
| subrIndex + (CF2_UInt)decoder->globals_bias, |
| charstringIndex + 1 )); |
| |
| if ( cf2_initGlobalRegionBuffer( decoder, |
| subrIndex, |
| charstring ) ) |
| { |
| lastError = FT_THROW( Invalid_Glyph_Format ); |
| goto exit; /* subroutine lookup or stream error */ |
| } |
| break; |
| |
| default: |
| /* cf2_cmdCALLSUBR */ |
| FT_TRACE4(( " (idx %d, entering level %d)\n", |
| subrIndex + (CF2_UInt)decoder->locals_bias, |
| charstringIndex + 1 )); |
| |
| if ( cf2_initLocalRegionBuffer( decoder, |
| subrIndex, |
| charstring ) ) |
| { |
| lastError = FT_THROW( Invalid_Glyph_Format ); |
| goto exit; /* subroutine lookup or stream error */ |
| } |
| } |
| |
| charstringIndex += 1; /* entry is valid now */ |
| } |
| continue; /* do not clear the stack */ |
| |
| case cf2_cmdRETURN: |
| FT_TRACE4(( " return (leaving level %d)\n", charstringIndex )); |
| |
| if ( charstringIndex < 1 ) |
| { |
| /* Note: cannot return from top charstring */ |
| lastError = FT_THROW( Invalid_Glyph_Format ); |
| goto exit; /* underflow of stack */ |
| } |
| |
| /* restore position in previous charstring */ |
| charstring = (CF2_Buffer) |
| cf2_arrstack_getPointer( |
| &subrStack, |
| (CF2_UInt)--charstringIndex ); |
| continue; /* do not clear the stack */ |
| |
| case cf2_cmdESC: |
| { |
| FT_Byte op2 = (FT_Byte)cf2_buf_readByte( charstring ); |
| |
| |
| switch ( op2 ) |
| { |
| case cf2_escDOTSECTION: |
| /* something about `flip type of locking' -- ignore it */ |
| FT_TRACE4(( " dotsection\n" )); |
| |
| break; |
| |
| /* TODO: should these operators be supported? */ |
| case cf2_escAND: /* in spec */ |
| FT_TRACE4(( " and\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escOR: /* in spec */ |
| FT_TRACE4(( " or\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escNOT: /* in spec */ |
| FT_TRACE4(( " not\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escABS: /* in spec */ |
| FT_TRACE4(( " abs\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escADD: /* in spec */ |
| FT_TRACE4(( " add\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escSUB: /* in spec */ |
| FT_TRACE4(( " sub\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escDIV: /* in spec */ |
| FT_TRACE4(( " div\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escNEG: /* in spec */ |
| FT_TRACE4(( " neg\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escEQ: /* in spec */ |
| FT_TRACE4(( " eq\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escDROP: /* in spec */ |
| FT_TRACE4(( " drop\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escPUT: /* in spec */ |
| FT_TRACE4(( " put\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escGET: /* in spec */ |
| FT_TRACE4(( " get\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escIFELSE: /* in spec */ |
| FT_TRACE4(( " ifelse\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escRANDOM: /* in spec */ |
| FT_TRACE4(( " random\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escMUL: /* in spec */ |
| FT_TRACE4(( " mul\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escSQRT: /* in spec */ |
| FT_TRACE4(( " sqrt\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escDUP: /* in spec */ |
| FT_TRACE4(( " dup\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escEXCH: /* in spec */ |
| FT_TRACE4(( " exch\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escINDEX: /* in spec */ |
| FT_TRACE4(( " index\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escROLL: /* in spec */ |
| FT_TRACE4(( " roll\n" )); |
| |
| CF2_FIXME; |
| break; |
| |
| case cf2_escHFLEX: |
| { |
| static const FT_Bool readFromStack[12] = |
| { |
| TRUE /* dx1 */, FALSE /* dy1 */, |
| TRUE /* dx2 */, TRUE /* dy2 */, |
| TRUE /* dx3 */, FALSE /* dy3 */, |
| TRUE /* dx4 */, FALSE /* dy4 */, |
| TRUE /* dx5 */, FALSE /* dy5 */, |
| TRUE /* dx6 */, FALSE /* dy6 */ |
| }; |
| |
| |
| FT_TRACE4(( " hflex\n" )); |
| |
| cf2_doFlex( opStack, |
| &curX, |
| &curY, |
| &glyphPath, |
| readFromStack, |
| FALSE /* doConditionalLastRead */ ); |
| } |
| continue; |
| |
| case cf2_escFLEX: |
| { |
| static const FT_Bool readFromStack[12] = |
| { |
| TRUE /* dx1 */, TRUE /* dy1 */, |
| TRUE /* dx2 */, TRUE /* dy2 */, |
| TRUE /* dx3 */, TRUE /* dy3 */, |
| TRUE /* dx4 */, TRUE /* dy4 */, |
| TRUE /* dx5 */, TRUE /* dy5 */, |
| TRUE /* dx6 */, TRUE /* dy6 */ |
| }; |
| |
| |
| FT_TRACE4(( " flex\n" )); |
| |
| cf2_doFlex( opStack, |
| &curX, |
| &curY, |
| &glyphPath, |
| readFromStack, |
| FALSE /* doConditionalLastRead */ ); |
| } |
| break; /* TODO: why is this not a continue? */ |
| |
| case cf2_escHFLEX1: |
| { |
| static const FT_Bool readFromStack[12] = |
| { |
| TRUE /* dx1 */, TRUE /* dy1 */, |
| TRUE /* dx2 */, TRUE /* dy2 */, |
| TRUE /* dx3 */, FALSE /* dy3 */, |
| TRUE /* dx4 */, FALSE /* dy4 */, |
| TRUE /* dx5 */, TRUE /* dy5 */, |
| TRUE /* dx6 */, FALSE /* dy6 */ |
| }; |
| |
| |
| FT_TRACE4(( " hflex1\n" )); |
| |
| cf2_doFlex( opStack, |
| &curX, |
| &curY, |
| &glyphPath, |
| readFromStack, |
| FALSE /* doConditionalLastRead */ ); |
| } |
| continue; |
| |
| case cf2_escFLEX1: |
| { |
| static const FT_Bool readFromStack[12] = |
| { |
| TRUE /* dx1 */, TRUE /* dy1 */, |
| TRUE /* dx2 */, TRUE /* dy2 */, |
| TRUE /* dx3 */, TRUE /* dy3 */, |
| TRUE /* dx4 */, TRUE /* dy4 */, |
| TRUE /* dx5 */, TRUE /* dy5 */, |
| FALSE /* dx6 */, FALSE /* dy6 */ |
| }; |
| |
| |
| FT_TRACE4(( " flex1\n" )); |
| |
| cf2_doFlex( opStack, |
| &curX, |
| &curY, |
| &glyphPath, |
| readFromStack, |
| TRUE /* doConditionalLastRead */ ); |
| } |
| continue; |
| |
| case cf2_escRESERVED_1: |
| case cf2_escRESERVED_2: |
| case cf2_escRESERVED_6: |
| case cf2_escRESERVED_7: |
| case cf2_escRESERVED_8: |
| case cf2_escRESERVED_13: |
| case cf2_escRESERVED_16: |
| case cf2_escRESERVED_17: |
| case cf2_escRESERVED_19: |
| case cf2_escRESERVED_25: |
| case cf2_escRESERVED_31: |
| case cf2_escRESERVED_32: |
| case cf2_escRESERVED_33: |
| default: |
| FT_TRACE4(( " unknown op (12, %d)\n", op2 )); |
| |
| }; /* end of switch statement checking `op2' */ |
| |
| } /* case cf2_cmdESC */ |
| break; |
| |
| case cf2_cmdENDCHAR: |
| FT_TRACE4(( " endchar\n" )); |
| |
| if ( cf2_stack_count( opStack ) == 1 || |
| cf2_stack_count( opStack ) == 5 ) |
| { |
| if ( !haveWidth ) |
| *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; |
| } |
| |
| /* width is defined or default after this */ |
| haveWidth = TRUE; |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| /* close path if still open */ |
| cf2_glyphpath_closeOpenPath( &glyphPath ); |
| |
| if ( cf2_stack_count( opStack ) > 1 ) |
| { |
| /* must be either 4 or 5 -- */ |
| /* this is a (deprecated) implied `seac' operator */ |
| |
| CF2_Int achar; |
| CF2_Int bchar; |
| CF2_BufferRec component; |
| CF2_Fixed dummyWidth; /* ignore component width */ |
| FT_Error error2; |
| |
| |
| if ( doingSeac ) |
| { |
| lastError = FT_THROW( Invalid_Glyph_Format ); |
| goto exit; /* nested seac */ |
| } |
| |
| achar = cf2_stack_popInt( opStack ); |
| bchar = cf2_stack_popInt( opStack ); |
| |
| curY = cf2_stack_popFixed( opStack ); |
| curX = cf2_stack_popFixed( opStack ); |
| |
| error2 = cf2_getSeacComponent( decoder, achar, &component ); |
| if ( error2 ) |
| { |
| lastError = error2; /* pass FreeType error through */ |
| goto exit; |
| } |
| cf2_interpT2CharString( font, |
| &component, |
| callbacks, |
| translation, |
| TRUE, |
| curX, |
| curY, |
| &dummyWidth ); |
| cf2_freeSeacComponent( decoder, &component ); |
| |
| error2 = cf2_getSeacComponent( decoder, bchar, &component ); |
| if ( error2 ) |
| { |
| lastError = error2; /* pass FreeType error through */ |
| goto exit; |
| } |
| cf2_interpT2CharString( font, |
| &component, |
| callbacks, |
| translation, |
| TRUE, |
| 0, |
| 0, |
| &dummyWidth ); |
| cf2_freeSeacComponent( decoder, &component ); |
| } |
| goto exit; |
| |
| case cf2_cmdCNTRMASK: |
| case cf2_cmdHINTMASK: |
| /* the final \n in the tracing message gets added in */ |
| /* `cf2_hintmask_read' (which also traces the mask bytes) */ |
| FT_TRACE4(( op1 == cf2_cmdCNTRMASK ? " cntrmask" : " hintmask" )); |
| |
| /* never add hints after the mask is computed */ |
| if ( cf2_stack_count( opStack ) > 1 && |
| cf2_hintmask_isValid( &hintMask ) ) |
| { |
| FT_TRACE4(( "cf2_interpT2CharString: invalid hint mask\n" )); |
| break; |
| } |
| |
| /* if there are arguments on the stack, there this is an */ |
| /* implied cf2_cmdVSTEMHM */ |
| cf2_doStems( font, |
| opStack, |
| &vStemHintArray, |
| width, |
| &haveWidth, |
| 0 ); |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| if ( op1 == cf2_cmdHINTMASK ) |
| { |
| /* consume the hint mask bytes which follow the operator */ |
| cf2_hintmask_read( &hintMask, |
| charstring, |
| cf2_arrstack_size( &hStemHintArray ) + |
| cf2_arrstack_size( &vStemHintArray ) ); |
| } |
| else |
| { |
| /* |
| * Consume the counter mask bytes which follow the operator: |
| * Build a temporary hint map, just to place and lock those |
| * stems participating in the counter mask. These are most |
| * likely the dominant hstems, and are grouped together in a |
| * few counter groups, not necessarily in correspondence |
| * with the hint groups. This reduces the chances of |
| * conflicts between hstems that are initially placed in |
| * separate hint groups and then brought together. The |
| * positions are copied back to `hStemHintArray', so we can |
| * discard `counterMask' and `counterHintMap'. |
| * |
| */ |
| CF2_HintMapRec counterHintMap; |
| CF2_HintMaskRec counterMask; |
| |
| |
| cf2_hintmap_init( &counterHintMap, |
| font, |
| &glyphPath.initialHintMap, |
| &glyphPath.hintMoves, |
| scaleY ); |
| cf2_hintmask_init( &counterMask, error ); |
| |
| cf2_hintmask_read( &counterMask, |
| charstring, |
| cf2_arrstack_size( &hStemHintArray ) + |
| cf2_arrstack_size( &vStemHintArray ) ); |
| cf2_hintmap_build( &counterHintMap, |
| &hStemHintArray, |
| &vStemHintArray, |
| &counterMask, |
| 0, |
| FALSE ); |
| } |
| break; |
| |
| case cf2_cmdRMOVETO: |
| FT_TRACE4(( " rmoveto\n" )); |
| |
| if ( cf2_stack_count( opStack ) > 2 && !haveWidth ) |
| *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; |
| |
| /* width is defined or default after this */ |
| haveWidth = TRUE; |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| curY += cf2_stack_popFixed( opStack ); |
| curX += cf2_stack_popFixed( opStack ); |
| |
| cf2_glyphpath_moveTo( &glyphPath, curX, curY ); |
| |
| break; |
| |
| case cf2_cmdHMOVETO: |
| FT_TRACE4(( " hmoveto\n" )); |
| |
| if ( cf2_stack_count( opStack ) > 1 && !haveWidth ) |
| *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; |
| |
| /* width is defined or default after this */ |
| haveWidth = TRUE; |
| |
| if ( font->decoder->width_only ) |
| goto exit; |
| |
| curX += cf2_stack_popFixed( opStack ); |
| |
| cf2_glyphpath_moveTo( &glyphPath, curX, curY ); |
| |
| break; |
| |
| case cf2_cmdRLINECURVE: |
| { |
| CF2_UInt count = cf2_stack_count( opStack ); |
| CF2_UInt index = 0; |
| |
| |
| FT_TRACE4(( " rlinecurve\n" )); |
| |
| while ( index + 6 < count ) |
| { |
| curX += cf2_stack_getReal( opStack, index + 0 ); |
| curY += cf2_stack_getReal( opStack, index + 1 ); |
| |
| cf2_glyphpath_lineTo( &glyphPath, curX, curY ); |
| index += 2; |
| } |
| |
| while ( index < count ) |
| { |
| CF2_Fixed x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; |
| CF2_Fixed y1 = cf2_stack_getReal( opStack, index + 1 ) + curY; |
| CF2_Fixed x2 = cf2_stack_getReal( opStack, index + 2 ) + x1; |
| CF2_Fixed y2 = cf2_stack_getReal( opStack, index + 3 ) + y1; |
| CF2_Fixed x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; |
| CF2_Fixed y3 = cf2_stack_getReal( opStack, index + 5 ) + y2; |
| |
| |
| cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); |
| |
| curX = x3; |
| curY = y3; |
| index += 6; |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; /* no need to clear stack again */ |
| |
| case cf2_cmdVVCURVETO: |
| { |
| CF2_UInt count, count1 = cf2_stack_count( opStack ); |
| CF2_UInt index = 0; |
| |
| |
| /* if `cf2_stack_count' isn't of the form 4n or 4n+1, */ |
| /* we enforce it by clearing the second bit */ |
| /* (and sorting the stack indexing to suit) */ |
| count = count1 & ~2; |
| index += count1 - count; |
| |
| FT_TRACE4(( " vvcurveto\n" )); |
| |
| while ( index < count ) |
| { |
| CF2_Fixed x1, y1, x2, y2, x3, y3; |
| |
| |
| if ( ( count - index ) & 1 ) |
| { |
| x1 = cf2_stack_getReal( opStack, index ) + curX; |
| |
| ++index; |
| } |
| else |
| x1 = curX; |
| |
| y1 = cf2_stack_getReal( opStack, index + 0 ) + curY; |
| x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; |
| y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; |
| x3 = x2; |
| y3 = cf2_stack_getReal( opStack, index + 3 ) + y2; |
| |
| cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); |
| |
| curX = x3; |
| curY = y3; |
| index += 4; |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; /* no need to clear stack again */ |
| |
| case cf2_cmdHHCURVETO: |
| { |
| CF2_UInt count, count1 = cf2_stack_count( opStack ); |
| CF2_UInt index = 0; |
| |
| |
| /* if `cf2_stack_count' isn't of the form 4n or 4n+1, */ |
| /* we enforce it by clearing the second bit */ |
| /* (and sorting the stack indexing to suit) */ |
| count = count1 & ~2; |
| index += count1 - count; |
| |
| FT_TRACE4(( " hhcurveto\n" )); |
| |
| while ( index < count ) |
| { |
| CF2_Fixed x1, y1, x2, y2, x3, y3; |
| |
| |
| if ( ( count - index ) & 1 ) |
| { |
| y1 = cf2_stack_getReal( opStack, index ) + curY; |
| |
| ++index; |
| } |
| else |
| y1 = curY; |
| |
| x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; |
| x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; |
| y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; |
| x3 = cf2_stack_getReal( opStack, index + 3 ) + x2; |
| y3 = y2; |
| |
| cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); |
| |
| curX = x3; |
| curY = y3; |
| index += 4; |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; /* no need to clear stack again */ |
| |
| case cf2_cmdVHCURVETO: |
| case cf2_cmdHVCURVETO: |
| { |
| CF2_UInt count, count1 = cf2_stack_count( opStack ); |
| CF2_UInt index = 0; |
| |
| FT_Bool alternate = op1 == cf2_cmdHVCURVETO; |
| |
| |
| /* if `cf2_stack_count' isn't of the form 8n, 8n+1, */ |
| /* 8n+4, or 8n+5, we enforce it by clearing the */ |
| /* second bit */ |
| /* (and sorting the stack indexing to suit) */ |
| count = count1 & ~2; |
| index += count1 - count; |
| |
| FT_TRACE4(( alternate ? " hvcurveto\n" : " vhcurveto\n" )); |
| |
| while ( index < count ) |
| { |
| CF2_Fixed x1, x2, x3, y1, y2, y3; |
| |
| |
| if ( alternate ) |
| { |
| x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; |
| y1 = curY; |
| x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; |
| y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; |
| y3 = cf2_stack_getReal( opStack, index + 3 ) + y2; |
| |
| if ( count - index == 5 ) |
| { |
| x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; |
| |
| ++index; |
| } |
| else |
| x3 = x2; |
| |
| alternate = FALSE; |
| } |
| else |
| { |
| x1 = curX; |
| y1 = cf2_stack_getReal( opStack, index + 0 ) + curY; |
| x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; |
| y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; |
| x3 = cf2_stack_getReal( opStack, index + 3 ) + x2; |
| |
| if ( count - index == 5 ) |
| { |
| y3 = cf2_stack_getReal( opStack, index + 4 ) + y2; |
| |
| ++index; |
| } |
| else |
| y3 = y2; |
| |
| alternate = TRUE; |
| } |
| |
| cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); |
| |
| curX = x3; |
| curY = y3; |
| index += 4; |
| } |
| |
| cf2_stack_clear( opStack ); |
| } |
| continue; /* no need to clear stack again */ |
| |
| case cf2_cmdEXTENDEDNMBR: |
| { |
| CF2_Int v; |
| |
| |
| v = (FT_Short)( ( cf2_buf_readByte( charstring ) << 8 ) | |
| cf2_buf_readByte( charstring ) ); |
| |
| FT_TRACE4(( " %d", v )); |
| |
| cf2_stack_pushInt( opStack, v ); |
| } |
| continue; |
| |
| default: |
| /* numbers */ |
| { |
| if ( /* op1 >= 32 && */ op1 <= 246 ) |
| { |
| CF2_Int v; |
| |
| |
| v = op1 - 139; |
| |
| FT_TRACE4(( " %d", v )); |
| |
| /* -107 .. 107 */ |
| cf2_stack_pushInt( opStack, v ); |
| } |
| |
| else if ( /* op1 >= 247 && */ op1 <= 250 ) |
| { |
| CF2_Int v; |
| |
| |
| v = op1; |
| v -= 247; |
| v *= 256; |
| v += cf2_buf_readByte( charstring ); |
| v += 108; |
| |
| FT_TRACE4(( " %d", v )); |
| |
| /* 108 .. 1131 */ |
| cf2_stack_pushInt( opStack, v ); |
| } |
| |
| else if ( /* op1 >= 251 && */ op1 <= 254 ) |
| { |
| CF2_Int v; |
| |
| |
| v = op1; |
| v -= 251; |
| v *= 256; |
| v += cf2_buf_readByte( charstring ); |
| v = -v - 108; |
| |
| FT_TRACE4(( " %d", v )); |
| |
| /* -1131 .. -108 */ |
| cf2_stack_pushInt( opStack, v ); |
| } |
| |
| else /* op1 == 255 */ |
| { |
| CF2_Fixed v; |
| |
| |
| v = (CF2_Fixed) |
| ( ( (FT_UInt32)cf2_buf_readByte( charstring ) << 24 ) | |
| ( (FT_UInt32)cf2_buf_readByte( charstring ) << 16 ) | |
| ( (FT_UInt32)cf2_buf_readByte( charstring ) << 8 ) | |
| (FT_UInt32)cf2_buf_readByte( charstring ) ); |
| |
| FT_TRACE4(( " %.2f", v / 65536.0 )); |
| |
| cf2_stack_pushFixed( opStack, v ); |
| } |
| } |
| continue; /* don't clear stack */ |
| |
| } /* end of switch statement checking `op1' */ |
| |
| cf2_stack_clear( opStack ); |
| |
| } /* end of main interpreter loop */ |
| |
| /* we get here if the charstring ends without cf2_cmdENDCHAR */ |
| FT_TRACE4(( "cf2_interpT2CharString:" |
| " charstring ends without ENDCHAR\n" )); |
| |
| exit: |
| /* check whether last error seen is also the first one */ |
| cf2_setError( error, lastError ); |
| |
| /* free resources from objects we've used */ |
| cf2_glyphpath_finalize( &glyphPath ); |
| cf2_arrstack_finalize( &vStemHintArray ); |
| cf2_arrstack_finalize( &hStemHintArray ); |
| cf2_arrstack_finalize( &subrStack ); |
| cf2_stack_free( opStack ); |
| |
| FT_TRACE4(( "\n" )); |
| |
| return; |
| } |
| |
| |
| /* END */ |
