forked from minhngoc25a/freetype2
Add code to ignore operators removed from CFF2 spec
Ignored operators clear the stack. Ignore return and endChar in CFF2. Ignore vsindex and blend in CFF. Add a nested switch for op2. First op2 switch handles 4 flex operators for CFF & CFF2 and all reserved operators common to both. Second op2 switch handles CFF operators that were removed from CFF2.
This commit is contained in:
Dave Arnold
parent
d5c247e923
commit
c156b734dd
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@ -273,7 +273,8 @@
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cf2_escHFLEX, /* 34 */
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cf2_escFLEX, /* 35 */
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cf2_escHFLEX1, /* 36 */
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cf2_escFLEX1 /* 37 */
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cf2_escFLEX1, /* 37 */
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cf2_escRESERVED_38 /* 38 & all higher */
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};
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@ -587,14 +588,25 @@
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{
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/* If we've reached the end of the charstring, simulate a */
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/* cf2_cmdRETURN or cf2_cmdENDCHAR. */
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/* We do this for both CFF and CFF2. */
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if ( charstringIndex )
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op1 = cf2_cmdRETURN; /* end of buffer for subroutine */
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else
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op1 = cf2_cmdENDCHAR; /* end of buffer for top level charstring */
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}
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else
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{
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op1 = (FT_Byte)cf2_buf_readByte( charstring );
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/* explicit RETURN and ENDCHAR in CFF2 should be ignored */
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/* Note: Trace message will report 0 instead of 11 or 14 */
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if ( ( op1 == cf2_cmdRETURN || op1 == cf2_cmdENDCHAR ) &&
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font->isCFF2 )
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{
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op1 = cf2_cmdRESERVED_0;
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}
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}
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/* check for errors once per loop */
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if ( *error )
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goto exit;
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@ -619,6 +631,11 @@
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case cf2_cmdVSINDEX:
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{
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FT_TRACE4(( " %d\n" ));
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if ( !font->isCFF2 )
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break; /* clear stack & ignore */
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if ( font->blend.usedBV )
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{
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/* vsindex not allowed after blend */
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@ -627,7 +644,6 @@
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}
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font->vsindex = (FT_UInt)cf2_stack_popInt( opStack );
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FT_TRACE4(( " %d\n", font->vsindex ));
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break;
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}
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@ -893,325 +909,10 @@
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FT_Byte op2 = (FT_Byte)cf2_buf_readByte( charstring );
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/* first switch for 2-byte operators handles CFF2 */
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/* and opcodes that are reserved for both CFF and CFF2 */
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switch ( op2 )
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{
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case cf2_escDOTSECTION:
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/* something about `flip type of locking' -- ignore it */
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FT_TRACE4(( " dotsection\n" ));
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break;
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case cf2_escAND:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " and\n" ));
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, arg1 && arg2 );
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}
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continue; /* do not clear the stack */
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case cf2_escOR:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " or\n" ));
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, arg1 || arg2 );
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}
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continue; /* do not clear the stack */
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case cf2_escNOT:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " not\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, !arg );
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}
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continue; /* do not clear the stack */
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case cf2_escABS:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " abs\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, FT_ABS( arg ) );
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}
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continue; /* do not clear the stack */
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case cf2_escADD:
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{
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CF2_F16Dot16 summand1;
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CF2_F16Dot16 summand2;
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FT_TRACE4(( " add\n" ));
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summand2 = cf2_stack_popFixed( opStack );
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summand1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, summand1 + summand2 );
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}
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continue; /* do not clear the stack */
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case cf2_escSUB:
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{
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CF2_F16Dot16 minuend;
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CF2_F16Dot16 subtrahend;
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FT_TRACE4(( " sub\n" ));
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subtrahend = cf2_stack_popFixed( opStack );
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minuend = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, minuend - subtrahend );
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}
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continue; /* do not clear the stack */
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case cf2_escDIV:
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{
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CF2_F16Dot16 dividend;
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CF2_F16Dot16 divisor;
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FT_TRACE4(( " div\n" ));
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divisor = cf2_stack_popFixed( opStack );
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dividend = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, FT_DivFix( dividend, divisor ) );
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}
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continue; /* do not clear the stack */
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case cf2_escNEG:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " neg\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, -arg );
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}
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continue; /* do not clear the stack */
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case cf2_escEQ:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " eq\n" ));
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, arg1 == arg2 );
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}
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continue; /* do not clear the stack */
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case cf2_escDROP:
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FT_TRACE4(( " drop\n" ));
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(void)cf2_stack_popFixed( opStack );
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continue; /* do not clear the stack */
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case cf2_escPUT:
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{
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CF2_F16Dot16 val;
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CF2_Int idx;
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FT_TRACE4(( " put\n" ));
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idx = cf2_stack_popInt( opStack );
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val = cf2_stack_popFixed( opStack );
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if ( idx >= 0 && idx < CF2_STORAGE_SIZE )
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storage[idx] = val;
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}
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continue; /* do not clear the stack */
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case cf2_escGET:
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{
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CF2_Int idx;
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FT_TRACE4(( " get\n" ));
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idx = cf2_stack_popInt( opStack );
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if ( idx >= 0 && idx < CF2_STORAGE_SIZE )
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cf2_stack_pushFixed( opStack, storage[idx] );
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}
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continue; /* do not clear the stack */
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case cf2_escIFELSE:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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CF2_F16Dot16 cond1;
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CF2_F16Dot16 cond2;
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FT_TRACE4(( " ifelse\n" ));
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cond2 = cf2_stack_popFixed( opStack );
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cond1 = cf2_stack_popFixed( opStack );
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, cond1 <= cond2 ? arg1 : arg2 );
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}
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continue; /* do not clear the stack */
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case cf2_escRANDOM: /* in spec */
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FT_TRACE4(( " random\n" ));
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CF2_FIXME;
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break;
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case cf2_escMUL:
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{
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CF2_F16Dot16 factor1;
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CF2_F16Dot16 factor2;
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FT_TRACE4(( " mul\n" ));
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factor2 = cf2_stack_popFixed( opStack );
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factor1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, FT_MulFix( factor1, factor2 ) );
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}
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continue; /* do not clear the stack */
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case cf2_escSQRT:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " sqrt\n" ));
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arg = cf2_stack_popFixed( opStack );
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if ( arg > 0 )
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{
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FT_Fixed root = arg;
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FT_Fixed new_root;
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/* Babylonian method */
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for (;;)
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{
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new_root = ( root + FT_DivFix( arg, root ) + 1 ) >> 1;
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if ( new_root == root )
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break;
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root = new_root;
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}
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arg = new_root;
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}
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else
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arg = 0;
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cf2_stack_pushFixed( opStack, arg );
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}
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continue; /* do not clear the stack */
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case cf2_escDUP:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " dup\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, arg );
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cf2_stack_pushFixed( opStack, arg );
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}
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continue; /* do not clear the stack */
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case cf2_escEXCH:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " exch\n" ));
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, arg2 );
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cf2_stack_pushFixed( opStack, arg1 );
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}
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continue; /* do not clear the stack */
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case cf2_escINDEX:
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{
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CF2_Int idx;
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CF2_UInt size;
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FT_TRACE4(( " index\n" ));
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idx = cf2_stack_popInt( opStack );
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size = cf2_stack_count( opStack );
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if ( size > 0 )
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{
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/* for `cf2_stack_getReal', index 0 is bottom of stack */
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CF2_UInt gr_idx;
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if ( idx < 0 )
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gr_idx = size - 1;
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else if ( (CF2_UInt)idx >= size )
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gr_idx = 0;
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else
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gr_idx = size - 1 - (CF2_UInt)idx;
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cf2_stack_pushFixed( opStack,
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cf2_stack_getReal( opStack, gr_idx ) );
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}
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}
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continue; /* do not clear the stack */
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case cf2_escROLL:
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{
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CF2_Int idx;
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CF2_Int count;
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FT_TRACE4(( " roll\n" ));
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idx = cf2_stack_popInt( opStack );
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count = cf2_stack_popInt( opStack );
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cf2_stack_roll( opStack, count, idx );
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}
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continue; /* do not clear the stack */
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case cf2_escHFLEX:
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{
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static const FT_Bool readFromStack[12] =
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@ -1308,6 +1009,7 @@
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}
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continue;
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/* these opcodes are reserved in both CFF & CFF2 */
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case cf2_escRESERVED_1:
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case cf2_escRESERVED_2:
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case cf2_escRESERVED_6:
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@ -1321,13 +1023,342 @@
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case cf2_escRESERVED_31:
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case cf2_escRESERVED_32:
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case cf2_escRESERVED_33:
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default:
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FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
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break;
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}; /* end of switch statement checking `op2' */
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default:
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{
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if ( font->isCFF2 || op2 >= cf2_escRESERVED_38 )
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FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
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else
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{
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/* second switch for 2-byte operators handles just CFF */
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switch ( op2 )
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{
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} /* case cf2_cmdESC */
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break;
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case cf2_escDOTSECTION:
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/* something about `flip type of locking' -- ignore it */
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FT_TRACE4(( " dotsection\n" ));
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break;
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case cf2_escAND:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " and\n" ));
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, arg1 && arg2 );
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}
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continue; /* do not clear the stack */
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case cf2_escOR:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " or\n" ));
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arg2 = cf2_stack_popFixed( opStack );
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arg1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, arg1 || arg2 );
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}
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continue; /* do not clear the stack */
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case cf2_escNOT:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " not\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushInt( opStack, !arg );
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}
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continue; /* do not clear the stack */
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case cf2_escABS:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " abs\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, FT_ABS( arg ) );
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}
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continue; /* do not clear the stack */
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case cf2_escADD:
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{
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CF2_F16Dot16 summand1;
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CF2_F16Dot16 summand2;
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FT_TRACE4(( " add\n" ));
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summand2 = cf2_stack_popFixed( opStack );
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summand1 = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, summand1 + summand2 );
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}
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continue; /* do not clear the stack */
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case cf2_escSUB:
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{
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CF2_F16Dot16 minuend;
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CF2_F16Dot16 subtrahend;
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FT_TRACE4(( " sub\n" ));
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subtrahend = cf2_stack_popFixed( opStack );
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minuend = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, minuend - subtrahend );
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}
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continue; /* do not clear the stack */
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case cf2_escDIV:
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{
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CF2_F16Dot16 dividend;
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CF2_F16Dot16 divisor;
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FT_TRACE4(( " div\n" ));
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divisor = cf2_stack_popFixed( opStack );
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dividend = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, FT_DivFix( dividend, divisor ) );
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}
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continue; /* do not clear the stack */
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case cf2_escNEG:
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{
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CF2_F16Dot16 arg;
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FT_TRACE4(( " neg\n" ));
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arg = cf2_stack_popFixed( opStack );
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cf2_stack_pushFixed( opStack, -arg );
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}
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continue; /* do not clear the stack */
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case cf2_escEQ:
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{
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CF2_F16Dot16 arg1;
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CF2_F16Dot16 arg2;
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FT_TRACE4(( " eq\n" ));
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arg2 = cf2_stack_popFixed( opStack );
|
||||
arg1 = cf2_stack_popFixed( opStack );
|
||||
|
||||
cf2_stack_pushInt( opStack, arg1 == arg2 );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escDROP:
|
||||
FT_TRACE4(( " drop\n" ));
|
||||
|
||||
(void)cf2_stack_popFixed( opStack );
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escPUT:
|
||||
{
|
||||
CF2_F16Dot16 val;
|
||||
CF2_Int idx;
|
||||
|
||||
|
||||
FT_TRACE4(( " put\n" ));
|
||||
|
||||
idx = cf2_stack_popInt( opStack );
|
||||
val = cf2_stack_popFixed( opStack );
|
||||
|
||||
if ( idx >= 0 && idx < CF2_STORAGE_SIZE )
|
||||
storage[idx] = val;
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escGET:
|
||||
{
|
||||
CF2_Int idx;
|
||||
|
||||
|
||||
FT_TRACE4(( " get\n" ));
|
||||
|
||||
idx = cf2_stack_popInt( opStack );
|
||||
|
||||
if ( idx >= 0 && idx < CF2_STORAGE_SIZE )
|
||||
cf2_stack_pushFixed( opStack, storage[idx] );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escIFELSE:
|
||||
{
|
||||
CF2_F16Dot16 arg1;
|
||||
CF2_F16Dot16 arg2;
|
||||
CF2_F16Dot16 cond1;
|
||||
CF2_F16Dot16 cond2;
|
||||
|
||||
|
||||
FT_TRACE4(( " ifelse\n" ));
|
||||
|
||||
cond2 = cf2_stack_popFixed( opStack );
|
||||
cond1 = cf2_stack_popFixed( opStack );
|
||||
arg2 = cf2_stack_popFixed( opStack );
|
||||
arg1 = cf2_stack_popFixed( opStack );
|
||||
|
||||
cf2_stack_pushFixed( opStack, cond1 <= cond2 ? arg1 : arg2 );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escRANDOM: /* in spec */
|
||||
FT_TRACE4(( " random\n" ));
|
||||
|
||||
CF2_FIXME;
|
||||
break;
|
||||
|
||||
case cf2_escMUL:
|
||||
{
|
||||
CF2_F16Dot16 factor1;
|
||||
CF2_F16Dot16 factor2;
|
||||
|
||||
|
||||
FT_TRACE4(( " mul\n" ));
|
||||
|
||||
factor2 = cf2_stack_popFixed( opStack );
|
||||
factor1 = cf2_stack_popFixed( opStack );
|
||||
|
||||
cf2_stack_pushFixed( opStack, FT_MulFix( factor1, factor2 ) );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escSQRT:
|
||||
{
|
||||
CF2_F16Dot16 arg;
|
||||
|
||||
|
||||
FT_TRACE4(( " sqrt\n" ));
|
||||
|
||||
arg = cf2_stack_popFixed( opStack );
|
||||
if ( arg > 0 )
|
||||
{
|
||||
FT_Fixed root = arg;
|
||||
FT_Fixed new_root;
|
||||
|
||||
|
||||
/* Babylonian method */
|
||||
for (;;)
|
||||
{
|
||||
new_root = ( root + FT_DivFix( arg, root ) + 1 ) >> 1;
|
||||
if ( new_root == root )
|
||||
break;
|
||||
root = new_root;
|
||||
}
|
||||
arg = new_root;
|
||||
}
|
||||
else
|
||||
arg = 0;
|
||||
|
||||
cf2_stack_pushFixed( opStack, arg );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escDUP:
|
||||
{
|
||||
CF2_F16Dot16 arg;
|
||||
|
||||
|
||||
FT_TRACE4(( " dup\n" ));
|
||||
|
||||
arg = cf2_stack_popFixed( opStack );
|
||||
|
||||
cf2_stack_pushFixed( opStack, arg );
|
||||
cf2_stack_pushFixed( opStack, arg );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escEXCH:
|
||||
{
|
||||
CF2_F16Dot16 arg1;
|
||||
CF2_F16Dot16 arg2;
|
||||
|
||||
|
||||
FT_TRACE4(( " exch\n" ));
|
||||
|
||||
arg2 = cf2_stack_popFixed( opStack );
|
||||
arg1 = cf2_stack_popFixed( opStack );
|
||||
|
||||
cf2_stack_pushFixed( opStack, arg2 );
|
||||
cf2_stack_pushFixed( opStack, arg1 );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escINDEX:
|
||||
{
|
||||
CF2_Int idx;
|
||||
CF2_UInt size;
|
||||
|
||||
|
||||
FT_TRACE4(( " index\n" ));
|
||||
|
||||
idx = cf2_stack_popInt( opStack );
|
||||
size = cf2_stack_count( opStack );
|
||||
|
||||
if ( size > 0 )
|
||||
{
|
||||
/* for `cf2_stack_getReal', index 0 is bottom of stack */
|
||||
CF2_UInt gr_idx;
|
||||
|
||||
|
||||
if ( idx < 0 )
|
||||
gr_idx = size - 1;
|
||||
else if ( (CF2_UInt)idx >= size )
|
||||
gr_idx = 0;
|
||||
else
|
||||
gr_idx = size - 1 - (CF2_UInt)idx;
|
||||
|
||||
cf2_stack_pushFixed( opStack,
|
||||
cf2_stack_getReal( opStack, gr_idx ) );
|
||||
}
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
case cf2_escROLL:
|
||||
{
|
||||
CF2_Int idx;
|
||||
CF2_Int count;
|
||||
|
||||
|
||||
FT_TRACE4(( " roll\n" ));
|
||||
|
||||
idx = cf2_stack_popInt( opStack );
|
||||
count = cf2_stack_popInt( opStack );
|
||||
|
||||
cf2_stack_roll( opStack, count, idx );
|
||||
}
|
||||
continue; /* do not clear the stack */
|
||||
|
||||
} /* end of 2nd switch checking op2 */
|
||||
}
|
||||
}
|
||||
}; /* end of 1st switch checking op2 */
|
||||
} /* case cf2_cmdESC */
|
||||
break; /* break switch checking op1 */
|
||||
|
||||
case cf2_cmdENDCHAR:
|
||||
FT_TRACE4(( " endchar\n" ));
|
||||
|
|
@ -1820,6 +1851,9 @@
|
|||
/* check whether last error seen is also the first one */
|
||||
cf2_setError( error, lastError );
|
||||
|
||||
if ( *error )
|
||||
FT_TRACE4(( "charstring error %d\n", *error ));
|
||||
|
||||
/* free resources from objects we've used */
|
||||
cf2_glyphpath_finalize( &glyphPath );
|
||||
cf2_arrstack_finalize( &vStemHintArray );
|
||||
|
|
|
|||
Loading…
Reference in New Issue