0,0 → 1,1538 |
/***************************************************************************/ |
/* */ |
/* cf2intrp.c */ |
/* */ |
/* Adobe's CFF Interpreter (body). */ |
/* */ |
/* Copyright 2007-2013 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 "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" )); |
|
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" )); |
|
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, |
charstringIndex + 1 ); |
|
/* set up the new CFF region and pointer */ |
subrIndex = cf2_stack_popInt( opStack ); |
|
switch ( op1 ) |
{ |
case cf2_cmdCALLGSUBR: |
FT_TRACE4(( "(%d)\n", subrIndex + decoder->globals_bias )); |
|
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(( "(%d)\n", subrIndex + decoder->locals_bias )); |
|
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\n" )); |
|
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, |
--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_UInt achar; |
CF2_UInt 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" )); |
|
/* if there are arguments on the stack, there this is an */ |
/* implied cf2_cmdVSTEMHM */ |
if ( cf2_stack_count( opStack ) != 0 ) |
{ |
/* never add hints after the mask is computed */ |
if ( cf2_hintmask_isValid( &hintMask ) ) |
FT_TRACE4(( "cf2_interpT2CharString: invalid hint mask\n" )); |
} |
|
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 = cf2_stack_count( opStack ); |
CF2_UInt index = 0; |
|
|
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 = cf2_stack_count( opStack ); |
CF2_UInt index = 0; |
|
|
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 = cf2_stack_count( opStack ); |
CF2_UInt index = 0; |
|
FT_Bool alternate = op1 == cf2_cmdHVCURVETO; |
|
|
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 */ |