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flutter / third_party / freetype2 / 3f9b78fc7991f053d7d38a8b702456e2e3eed282 / . / src / psaux / psintrp.c
blob: c550533a0fcec16ad257df5445252a29b70785f5 [file] [log] [blame]
/****************************************************************************
*
* psintrp.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 "psft.h"
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/services/svcfftl.h>
#include "psglue.h"
#include "psfont.h"
#include "psstack.h"
#include "pshints.h"
#include "psintrp.h"
#include "pserror.h"
#include "psobjs.h" /* for cff_random */
#include "t1decode.h" /* for t1 seac */
/**************************************************************************
*
* 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 cf2interp
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_cmdCLOSEPATH, /* 9 T1 only */
cf2_cmdCALLSUBR, /* 10 */
cf2_cmdRETURN, /* 11 */
cf2_cmdESC, /* 12 */
cf2_cmdHSBW, /* 13 T1 only */
cf2_cmdENDCHAR, /* 14 */
cf2_cmdVSINDEX, /* 15 */
cf2_cmdBLEND, /* 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_escVSTEM3, /* 1 T1 only */
cf2_escHSTEM3, /* 2 T1 only */
cf2_escAND, /* 3 */
cf2_escOR, /* 4 */
cf2_escNOT, /* 5 */
cf2_escSEAC, /* 6 T1 only */
cf2_escSBW, /* 7 T1 only */
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_escCALLOTHERSUBR,/* 16 T1 only */
cf2_escPOP, /* 17 T1 only */
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_escSETCURRENTPT, /* 33 T1 only */
cf2_escHFLEX, /* 34 */
cf2_escFLEX, /* 35 */
cf2_escHFLEX1, /* 36 */
cf2_escFLEX1, /* 37 */
cf2_escRESERVED_38 /* 38 & all higher */
};
/* `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 ( font->isT1 && !font->decoder->flex_state && !*haveWidth )
FT_ERROR(( "cf2_doStems (Type 1 mode):"
" No width. Use hsbw/sbw as first op\n" ));
if ( !font->isT1 && hasWidthArg && !*haveWidth )
*width = ADD_INT32( 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 = ADD_INT32( position,
cf2_stack_getReal( opStack, i ) );
stemhint.max =
position = ADD_INT32( 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 idx;
FT_Bool isHFlex;
CF2_Int top, i, j;
vals[0] = *curX;
vals[1] = *curY;
idx = 0;
isHFlex = FT_BOOL( readFromStack[9] == FALSE );
top = isHFlex ? 9 : 10;
for ( i = 0; i < top; i++ )
{
vals[i + 2] = vals[i];
if ( readFromStack[i] )
vals[i + 2] = ADD_INT32( vals[i + 2], cf2_stack_getReal( opStack,
idx++ ) );
}
if ( isHFlex )
vals[9 + 2] = *curY;
if ( doConditionalLastRead )
{
FT_Bool lastIsX = FT_BOOL(
cf2_fixedAbs( SUB_INT32( vals[10], *curX ) ) >
cf2_fixedAbs( SUB_INT32( vals[11], *curY ) ) );
CF2_Fixed lastVal = cf2_stack_getReal( opStack, idx );
if ( lastIsX )
{
vals[12] = ADD_INT32( vals[10], lastVal );
vals[13] = *curY;
}
else
{
vals[12] = *curX;
vals[13] = ADD_INT32( vals[11], lastVal );
}
}
else
{
if ( readFromStack[10] )
vals[12] = ADD_INT32( vals[10],
cf2_stack_getReal( opStack, idx++ ) );
else
vals[12] = *curX;
if ( readFromStack[11] )
vals[13] = ADD_INT32( vals[11],
cf2_stack_getReal( opStack, idx ) );
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];
}
/* Blend numOperands on the stack, */
/* store results into the first numBlends values, */
/* then pop remaining arguments. */
static void
cf2_doBlend( const CFF_Blend blend,
CF2_Stack opStack,
CF2_UInt numBlends )
{
CF2_UInt delta;
CF2_UInt base;
CF2_UInt i, j;
CF2_UInt numOperands = (CF2_UInt)( numBlends * blend->lenBV );
base = cf2_stack_count( opStack ) - numOperands;
delta = base + numBlends;
for ( i = 0; i < numBlends; i++ )
{
const CF2_Fixed* weight = &blend->BV[1];
/* start with first term */
CF2_Fixed sum = cf2_stack_getReal( opStack, i + base );
for ( j = 1; j < blend->lenBV; j++ )
sum = ADD_INT32( sum,
FT_MulFix( *weight++,
cf2_stack_getReal( opStack,
delta++ ) ) );
/* store blended result */
cf2_stack_setReal( opStack, i + base, sum );
}
/* leave only `numBlends' results on stack */
cf2_stack_pop( opStack, numOperands - numBlends );
}
/*
* `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,
const 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 */
PS_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 );
/* stuff for Type 1 */
FT_Int known_othersubr_result_cnt = 0;
FT_Bool large_int = FALSE;
FT_Bool initial_map_ready = FALSE;
#define PS_STORAGE_SIZE 3
CF2_F16Dot16 results[PS_STORAGE_SIZE]; /* for othersubr results */
FT_Int result_cnt = 0;
/* save this for hinting seac accents */
CF2_Fixed hintOriginY = curY;
CF2_Stack opStack = NULL;
FT_UInt stackSize;
FT_Byte op1; /* first opcode byte */
CF2_F16Dot16 storage[CF2_STORAGE_SIZE]; /* for `put' and `get' */
CF2_F16Dot16 flexStore[6]; /* for Type 1 flex */
/* 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;
FT_ZERO( &storage );
FT_ZERO( &results );
FT_ZERO( &flexStore );
/* 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.
*
* CFF2 charstrings always return the default width (0).
*
*/
haveWidth = font->isCFF2 ? TRUE : 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 */
stackSize = font->isCFF2 ? cf2_getMaxstack( decoder )
: CF2_OPERAND_STACK_SIZE;
opStack = cf2_stack_init( memory, error, stackSize );
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 );
/* catch errors so far */
if ( *error )
goto exit;
*charstring = *buf; /* structure copy */
charstringIndex = 0; /* entry is valid now */
/* main interpreter loop */
while ( 1 )
{
if ( font->isT1 )
FT_ASSERT( known_othersubr_result_cnt == 0 ||
result_cnt == 0 );
if ( cf2_buf_isEnd( charstring ) )
{
/* If we've reached the end of the charstring, simulate a */
/* cf2_cmdRETURN or cf2_cmdENDCHAR. */
/* We do this for both CFF and CFF2. */
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 );
/* Explicit RETURN and ENDCHAR in CFF2 should be ignored. */
/* Note: Trace message will report 0 instead of 11 or 14. */
if ( ( op1 == cf2_cmdRETURN || op1 == cf2_cmdENDCHAR ) &&
font->isCFF2 )
op1 = cf2_cmdRESERVED_0;
}
if ( font->isT1 )
{
if ( !initial_map_ready &&
!( op1 == cf2_cmdHSTEM ||
op1 == cf2_cmdVSTEM ||
op1 == cf2_cmdHSBW ||
op1 == cf2_cmdCALLSUBR ||
op1 == cf2_cmdRETURN ||
op1 == cf2_cmdESC ||
op1 == cf2_cmdENDCHAR ||
op1 >= 32 /* Numbers */ ) )
{
/* Skip outline commands first time round. */
/* `endchar' will trigger initial hintmap build */
/* and rewind the charstring. */
FT_TRACE4(( " <outline command skipped>\n" ));
cf2_stack_clear( opStack );
continue;
}
if ( result_cnt > 0 &&
!( op1 == cf2_cmdCALLSUBR ||
op1 == cf2_cmdRETURN ||
op1 == cf2_cmdESC ||
op1 >= 32 /* Numbers */ ) )
{
/* all operands have been transferred by previous pops */
result_cnt = 0;
}
if ( large_int && !( op1 >= 32 || op1 == cf2_escDIV ) )
{
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" no `div' after large integer\n" ));
large_int = FALSE;
}
}
/* 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_17:
/* we may get here if we have a prior error */
FT_TRACE4(( " unknown op (%d)\n", op1 ));
break;
case cf2_cmdVSINDEX:
FT_TRACE4(( " vsindex\n" ));
if ( !font->isCFF2 )
break; /* clear stack & ignore */
if ( font->blend.usedBV )
{
/* vsindex not allowed after blend */
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
{
FT_Int temp = cf2_stack_popInt( opStack );
if ( temp >= 0 )
font->vsindex = (FT_UInt)temp;
}
break;
case cf2_cmdBLEND:
{
FT_UInt numBlends;
FT_TRACE4(( " blend\n" ));
if ( !font->isCFF2 )
break; /* clear stack & ignore */
/* do we have a `blend' op in a non-variant font? */
if ( !font->blend.font )
{
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* check cached blend vector */
if ( font->cffload->blend_check_vector( &font->blend,
font->vsindex,
font->lenNDV,
font->NDV ) )
{
lastError = font->cffload->blend_build_vector( &font->blend,
font->vsindex,
font->lenNDV,
font->NDV );
if ( lastError )
goto exit;
}
/* do the blend */
numBlends = (FT_UInt)cf2_stack_popInt( opStack );
if ( numBlends > stackSize )
{
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
cf2_doBlend( &font->blend, opStack, numBlends );
font->blend.usedBV = TRUE;
}
continue; /* do not clear the stack */
case cf2_cmdHSTEMHM:
case cf2_cmdHSTEM:
FT_TRACE4(( "%s\n", op1 == cf2_cmdHSTEMHM ? " hstemhm"
: " hstem" ));
if ( !font->isT1 )
{
/* never add hints after the mask is computed */
/* except if in Type 1 mode (no hintmask op) */
if ( cf2_hintmask_isValid( &hintMask ) )
{
FT_TRACE4(( "cf2_interpT2CharString:"
" invalid horizontal hint mask\n" ));
break;
}
}
/* add left-sidebearing correction in Type 1 mode */
cf2_doStems( font,
opStack,
&hStemHintArray,
width,
&haveWidth,
font->isT1 ? decoder->builder.left_bearing->y
: 0 );
if ( decoder->width_only )
goto exit;
break;
case cf2_cmdVSTEMHM:
case cf2_cmdVSTEM:
FT_TRACE4(( "%s\n", op1 == cf2_cmdVSTEMHM ? " vstemhm"
: " vstem" ));
if ( !font->isT1 )
{
/* never add hints after the mask is computed */
/* except if in Type 1 mode (no hintmask op) */
if ( cf2_hintmask_isValid( &hintMask ) )
{
FT_TRACE4(( "cf2_interpT2CharString:"
" invalid vertical hint mask\n" ));
break;
}
}
/* add left-sidebearing correction in Type 1 mode */
cf2_doStems( font,
opStack,
&vStemHintArray,
width,
&haveWidth,
font->isT1 ? decoder->builder.left_bearing->x
: 0 );
if ( decoder->width_only )
goto exit;
break;
case cf2_cmdVMOVETO:
FT_TRACE4(( " vmoveto\n" ));
if ( font->isT1 && !decoder->flex_state && !haveWidth )
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" No width. Use hsbw/sbw as first op\n" ));
if ( cf2_stack_count( opStack ) > 1 && !haveWidth )
*width = ADD_INT32( cf2_stack_getReal( opStack, 0 ),
nominalWidthX );
/* width is defined or default after this */
haveWidth = TRUE;
if ( decoder->width_only )
goto exit;
curY = ADD_INT32( curY, cf2_stack_popFixed( opStack ) );
if ( !decoder->flex_state )
cf2_glyphpath_moveTo( &glyphPath, curX, curY );
break;
case cf2_cmdRLINETO:
{
CF2_UInt idx;
CF2_UInt count = cf2_stack_count( opStack );
FT_TRACE4(( " rlineto\n" ));
for ( idx = 0; idx < count; idx += 2 )
{
curX = ADD_INT32( curX, cf2_stack_getReal( opStack,
idx + 0 ) );
curY = ADD_INT32( curY, cf2_stack_getReal( opStack,
idx + 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 idx;
CF2_UInt count = cf2_stack_count( opStack );
FT_Bool isX = FT_BOOL( op1 == cf2_cmdHLINETO );
FT_TRACE4(( "%s\n", isX ? " hlineto" : " vlineto" ));
for ( idx = 0; idx < count; idx++ )
{
CF2_Fixed v = cf2_stack_getReal( opStack, idx );
if ( isX )
curX = ADD_INT32( curX, v );
else
curY = ADD_INT32( 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 idx = 0;
FT_TRACE4(( "%s\n", op1 == cf2_cmdRCURVELINE ? " rcurveline"
: " rrcurveto" ));
while ( idx + 6 <= count )
{
CF2_Fixed x1, y1, x2, y2, x3, y3;
x1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 0 ), curX );
y1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 1 ), curY );
x2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 2 ), x1 );
y2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 3 ), y1 );
x3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 4 ), x2 );
y3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 5 ), y2 );
cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 );
curX = x3;
curY = y3;
idx += 6;
}
if ( op1 == cf2_cmdRCURVELINE )
{
curX = ADD_INT32( curX, cf2_stack_getReal( opStack,
idx + 0 ) );
curY = ADD_INT32( curY, cf2_stack_getReal( opStack,
idx + 1 ) );
cf2_glyphpath_lineTo( &glyphPath, curX, curY );
}
cf2_stack_clear( opStack );
}
continue; /* no need to clear stack again */
case cf2_cmdCLOSEPATH:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (%d)\n", op1 ));
else
{
FT_TRACE4(( " closepath\n" ));
/* if there is no path, `closepath' is a no-op */
cf2_glyphpath_closeOpenPath( &glyphPath );
haveWidth = TRUE;
}
break;
case cf2_cmdCALLGSUBR:
case cf2_cmdCALLSUBR:
{
CF2_Int subrNum;
FT_TRACE4(( "%s", op1 == cf2_cmdCALLGSUBR ? " callgsubr"
: " callsubr" ));
if ( ( !font->isT1 && charstringIndex > CF2_MAX_SUBR ) ||
( font->isT1 && charstringIndex > T1_MAX_SUBRS_CALLS ) )
{
/* 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 */
subrNum = cf2_stack_popInt( opStack );
if ( font->isT1 && decoder->locals_hash )
{
size_t* val = ft_hash_num_lookup( subrNum,
decoder->locals_hash );
if ( val )
subrNum = *val;
else
subrNum = -1;
}
switch ( op1 )
{
case cf2_cmdCALLGSUBR:
FT_TRACE4(( " (idx %d, entering level %d)\n",
subrNum + decoder->globals_bias,
charstringIndex + 1 ));
if ( cf2_initGlobalRegionBuffer( decoder,
subrNum,
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",
subrNum + decoder->locals_bias,
charstringIndex + 1 ));
if ( cf2_initLocalRegionBuffer( decoder,
subrNum,
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 );
/* first switch for 2-byte operators handles CFF2 */
/* and opcodes that are reserved for both CFF and CFF2 */
switch ( op2 )
{
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;
/* these opcodes are always reserved */
case cf2_escRESERVED_8:
case cf2_escRESERVED_13:
case cf2_escRESERVED_19:
case cf2_escRESERVED_25:
case cf2_escRESERVED_31:
case cf2_escRESERVED_32:
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
break;
default:
{
if ( font->isCFF2 || op2 >= cf2_escRESERVED_38 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else if ( font->isT1 && result_cnt > 0 && op2 != cf2_escPOP )
{
/* all operands have been transferred by previous pops */
result_cnt = 0;
}
else
{
/* second switch for 2-byte operators handles */
/* CFF and Type 1 */
switch ( op2 )
{
case cf2_escDOTSECTION:
/* something about `flip type of locking' -- ignore it */
FT_TRACE4(( " dotsection\n" ));
break;
case cf2_escVSTEM3:
case cf2_escHSTEM3:
/*
* Type 1: Type 2:
* x0 dx0 x1 dx1 x2 dx2 vstem3 x dx {dxa dxb}* vstem
* y0 dy0 y1 dy1 y2 dy2 hstem3 y dy {dya dyb}* hstem
* relative to lsb point relative to zero
*
*/
{
if ( !font->isT1 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else
{
CF2_F16Dot16 v0, v1, v2;
FT_Bool isV = FT_BOOL( op2 == cf2_escVSTEM3 );
FT_TRACE4(( "%s\n", isV ? " vstem3"
: " hstem3" ));
FT_ASSERT( cf2_stack_count( opStack ) == 6 );
v0 = cf2_stack_getReal( opStack, 0 );
v1 = cf2_stack_getReal( opStack, 2 );
v2 = cf2_stack_getReal( opStack, 4 );
cf2_stack_setReal(
opStack, 2,
SUB_INT32( SUB_INT32( v1, v0 ),
cf2_stack_getReal( opStack, 1 ) ) );
cf2_stack_setReal(
opStack, 4,
SUB_INT32( SUB_INT32( v2, v1 ),
cf2_stack_getReal( opStack, 3 ) ) );
/* add left-sidebearing correction */
cf2_doStems( font,
opStack,
isV ? &vStemHintArray : &hStemHintArray,
width,
&haveWidth,
isV ? decoder->builder.left_bearing->x
: decoder->builder.left_bearing->y );
if ( decoder->width_only )
goto exit;
}
}
break;
case cf2_escAND:
{
CF2_F16Dot16 arg1;
CF2_F16Dot16 arg2;
FT_TRACE4(( " and\n" ));
arg2 = cf2_stack_popFixed( opStack );
arg1 = cf2_stack_popFixed( opStack );
cf2_stack_pushInt( opStack, arg1 && arg2 );
}
continue; /* do not clear the stack */
case cf2_escOR:
{
CF2_F16Dot16 arg1;
CF2_F16Dot16 arg2;
FT_TRACE4(( " or\n" ));
arg2 = cf2_stack_popFixed( opStack );
arg1 = cf2_stack_popFixed( opStack );
cf2_stack_pushInt( opStack, arg1 || arg2 );
}
continue; /* do not clear the stack */
case cf2_escNOT:
{
CF2_F16Dot16 arg;
FT_TRACE4(( " not\n" ));
arg = cf2_stack_popFixed( opStack );
cf2_stack_pushInt( opStack, !arg );
}
continue; /* do not clear the stack */
case cf2_escSEAC:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else
{
FT_Error error2;
CF2_Int bchar_index, achar_index;
FT_Vector left_bearing, advance;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
T1_Face face = (T1_Face)decoder->builder.face;
#endif
CF2_BufferRec component;
CF2_Fixed dummyWidth;
CF2_Int achar = cf2_stack_popInt( opStack );
CF2_Int bchar = cf2_stack_popInt( opStack );
FT_Pos ady = cf2_stack_popFixed ( opStack );
FT_Pos adx = cf2_stack_popFixed ( opStack );
FT_Pos asb = cf2_stack_popFixed ( opStack );
FT_TRACE4(( " seac\n" ));
if ( doingSeac )
{
FT_ERROR(( " nested seac\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit; /* nested seac */
}
if ( decoder->builder.metrics_only )
{
FT_ERROR(( " unexpected seac\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit; /* unexpected seac */
}
/* `glyph_names' is set to 0 for CID fonts which do */
/* not include an encoding. How can we deal with */
/* these? */
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( decoder->glyph_names == 0 &&
!face->root.internal->incremental_interface )
#else
if ( decoder->glyph_names == 0 )
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
{
FT_ERROR(( "cf2_interpT2CharString:\n" ));
FT_ERROR(( " (Type 1 seac) glyph names table"
" not available in this font\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* seac weirdness */
adx += decoder->builder.left_bearing->x;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( face->root.internal->incremental_interface )
{
/* the caller must handle the font encoding also */
bchar_index = bchar;
achar_index = achar;
}
else
#endif
{
bchar_index = t1_lookup_glyph_by_stdcharcode_ps(
decoder, bchar );
achar_index = t1_lookup_glyph_by_stdcharcode_ps(
decoder, achar );
}
if ( bchar_index < 0 || achar_index < 0 )
{
FT_ERROR(( "cf2_interpT2CharString:\n" ));
FT_ERROR(( " (Type 1 seac) invalid"
" seac character code arguments\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* if we are trying to load a composite glyph, */
/* do not load the accent character and return */
/* the array of subglyphs. */
if ( decoder->builder.no_recurse )
{
FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
FT_GlyphLoader loader = glyph->internal->loader;
FT_SubGlyph subg;
/* reallocate subglyph array if necessary */
error2 = FT_GlyphLoader_CheckSubGlyphs( loader, 2 );
if ( error2 )
{
lastError = error2; /* pass FreeType error through */
goto exit;
}
subg = loader->current.subglyphs;
/* subglyph 0 = base character */
subg->index = bchar_index;
subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES |
FT_SUBGLYPH_FLAG_USE_MY_METRICS;
subg->arg1 = 0;
subg->arg2 = 0;
subg++;
/* subglyph 1 = accent character */
subg->index = achar_index;
subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES;
subg->arg1 = (FT_Int)FIXED_TO_INT( adx - asb );
subg->arg2 = (FT_Int)FIXED_TO_INT( ady );
/* set up remaining glyph fields */
glyph->num_subglyphs = 2;
glyph->subglyphs = loader->base.subglyphs;
glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
loader->current.num_subglyphs = 2;
goto exit;
}
/* First load `bchar' in builder */
/* now load the unscaled outline */
/* prepare loader */
FT_GlyphLoader_Prepare( decoder->builder.loader );
error2 = cf2_getT1SeacComponent( decoder,
(FT_UInt)bchar_index,
&component );
if ( error2 )
{
lastError = error2; /* pass FreeType error through */
goto exit;
}
/* save the left bearing and width of the SEAC */
/* glyph as they will be erased by the next load */
left_bearing = *decoder->builder.left_bearing;
advance = *decoder->builder.advance;
cf2_interpT2CharString( font,
&component,
callbacks,
translation,
TRUE,
0,
0,
&dummyWidth );
cf2_freeT1SeacComponent( decoder, &component );
/* If the SEAC glyph doesn't have a (H)SBW of its */
/* own use the values from the base glyph. */
if ( !haveWidth )
{
left_bearing = *decoder->builder.left_bearing;
advance = *decoder->builder.advance;
}
decoder->builder.left_bearing->x = 0;
decoder->builder.left_bearing->y = 0;
/* Now load `achar' on top of */
/* the base outline */
error2 = cf2_getT1SeacComponent( decoder,
(FT_UInt)achar_index,
&component );
if ( error2 )
{
lastError = error2; /* pass FreeType error through */
goto exit;
}
cf2_interpT2CharString( font,
&component,
callbacks,
translation,
TRUE,
adx - asb,
ady,
&dummyWidth );
cf2_freeT1SeacComponent( decoder, &component );
/* restore the left side bearing and advance width */
/* of the SEAC glyph or base character (saved above) */
*decoder->builder.left_bearing = left_bearing;
*decoder->builder.advance = advance;
goto exit;
}
break;
case cf2_escSBW:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else
{
CF2_Fixed lsb_x, lsb_y;
PS_Builder* builder;
FT_TRACE4(( " sbw" ));
builder = &decoder->builder;
builder->advance->y = cf2_stack_popFixed( opStack );
builder->advance->x = cf2_stack_popFixed( opStack );
lsb_y = cf2_stack_popFixed( opStack );
lsb_x = cf2_stack_popFixed( opStack );
builder->left_bearing->x =
ADD_INT32( builder->left_bearing->x, lsb_x );
builder->left_bearing->y =
ADD_INT32( builder->left_bearing->y, lsb_y );
haveWidth = TRUE;
/* the `metrics_only' indicates that we only want */
/* to compute the glyph's metrics (lsb + advance */
/* width), not load the rest of it; so exit */
/* immediately */
if ( builder->metrics_only )
goto exit;
if ( initial_map_ready )
{
curX = ADD_INT32( curX, lsb_x );
curY = ADD_INT32( curY, lsb_y );
}
}
break;
case cf2_escABS:
{
CF2_F16Dot16 arg;
FT_TRACE4(( " abs\n" ));
arg = cf2_stack_popFixed( opStack );
if ( arg < -CF2_FIXED_MAX )
cf2_stack_pushFixed( opStack, CF2_FIXED_MAX );
else
cf2_stack_pushFixed( opStack, FT_ABS( arg ) );
}
continue; /* do not clear the stack */
case cf2_escADD:
{
CF2_F16Dot16 summand1;
CF2_F16Dot16 summand2;
FT_TRACE4(( " add\n" ));
summand2 = cf2_stack_popFixed( opStack );
summand1 = cf2_stack_popFixed( opStack );
cf2_stack_pushFixed( opStack,
ADD_INT32( summand1,
summand2 ) );
}
continue; /* do not clear the stack */
case cf2_escSUB:
{
CF2_F16Dot16 minuend;
CF2_F16Dot16 subtrahend;
FT_TRACE4(( " sub\n" ));
subtrahend = cf2_stack_popFixed( opStack );
minuend = cf2_stack_popFixed( opStack );
cf2_stack_pushFixed( opStack,
SUB_INT32( minuend, subtrahend ) );
}
continue; /* do not clear the stack */
case cf2_escDIV:
{
CF2_F16Dot16 dividend;
CF2_F16Dot16 divisor;
FT_TRACE4(( " div\n" ));
if ( font->isT1 && large_int )
{
divisor = (CF2_F16Dot16)cf2_stack_popInt( opStack );
dividend = (CF2_F16Dot16)cf2_stack_popInt( opStack );
large_int = FALSE;
}
else
{
divisor = cf2_stack_popFixed( opStack );
dividend = cf2_stack_popFixed( opStack );
}
cf2_stack_pushFixed( opStack,
FT_DivFix( dividend, divisor ) );
}
continue; /* do not clear the stack */
case cf2_escNEG:
{
CF2_F16Dot16 arg;
FT_TRACE4(( " neg\n" ));
arg = cf2_stack_popFixed( opStack );
if ( arg < -CF2_FIXED_MAX )
cf2_stack_pushFixed( opStack, CF2_FIXED_MAX );
else
cf2_stack_pushFixed( opStack, -arg );
}
continue; /* do not clear the stack */
case cf2_escEQ:
{
CF2_F16Dot16 arg1;
CF2_F16Dot16 arg2;
FT_TRACE4(( " eq\n" ));
arg2 = cf2_stack_popFixed( opStack );
arg1 = cf2_stack_popFixed( opStack );
cf2_stack_pushInt( opStack, arg1 == arg2 );
}
continue; /* do not clear the stack */
case cf2_escCALLOTHERSUBR:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else
{
CF2_Int subr_no;
CF2_Int arg_cnt;
CF2_UInt count;
CF2_UInt opIdx = 0;
FT_TRACE4(( " callothersubr\n" ));
subr_no = cf2_stack_popInt( opStack );
arg_cnt = cf2_stack_popInt( opStack );
/********************************************************
*
* remove all operands to callothersubr from the stack
*
* for handled othersubrs, where we know the number of
* arguments, we increase the stack by the value of
* known_othersubr_result_cnt
*
* for unhandled othersubrs the following pops adjust
* the stack pointer as necessary
*/
count = cf2_stack_count( opStack );
if ( (CF2_UInt)arg_cnt > count )
{
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" stack underflow\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
opIdx += count - (CF2_UInt)arg_cnt;
known_othersubr_result_cnt = 0;
result_cnt = 0;
/* XXX TODO: The checks to `arg_count == <whatever>' */
/* might not be correct; an othersubr expects a */
/* certain number of operands on the PostScript stack */
/* (as opposed to the T1 stack) but it doesn't have to */
/* put them there by itself; previous othersubrs might */
/* have left the operands there if they were not */
/* followed by an appropriate number of pops */
/* */
/* On the other hand, Adobe Reader 7.0.8 for Linux */
/* doesn't accept a font that contains charstrings */
/* like */
/* */
/* 100 200 2 20 callothersubr */
/* 300 1 20 callothersubr pop */
/* */
/* Perhaps this is the reason why BuildCharArray */
/* exists. */
switch ( subr_no )
{
case 0: /* end flex feature */
if ( arg_cnt != 3 )
goto Unexpected_OtherSubr;
if ( initial_map_ready &&
( !decoder->flex_state ||
decoder->num_flex_vectors != 7 ) )
{
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" unexpected flex end\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* the two `results' are popped */
/* by the following setcurrentpoint */
cf2_stack_pushFixed( opStack, curX );
cf2_stack_pushFixed( opStack, curY );
known_othersubr_result_cnt = 2;
break;
case 1: /* start flex feature */
if ( arg_cnt != 0 )
goto Unexpected_OtherSubr;
if ( !initial_map_ready )
break;
if ( ps_builder_check_points( &decoder->builder, 6 ) )
goto exit;
decoder->flex_state = 1;
decoder->num_flex_vectors = 0;
break;
case 2: /* add flex vectors */
{
FT_Int idx;
FT_Int idx2;
if ( arg_cnt != 0 )
goto Unexpected_OtherSubr;
if ( !initial_map_ready )
break;
if ( !decoder->flex_state )
{
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" missing flex start\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* note that we should not add a point for */
/* index 0; this will move our current position */
/* to the flex point without adding any point */
/* to the outline */
idx = decoder->num_flex_vectors++;
if ( idx > 0 && idx < 7 )
{
/* in malformed fonts it is possible to have */
/* other opcodes in the middle of a flex (which */
/* don't increase `num_flex_vectors'); we thus */
/* have to check whether we can add a point */
if ( ps_builder_check_points( &decoder->builder,
1 ) )
{
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* map: 1->2 2->4 3->6 4->2 5->4 6->6 */
idx2 = ( idx > 3 ? idx - 3 : idx ) * 2;
flexStore[idx2 - 2] = curX;
flexStore[idx2 - 1] = curY;
if ( idx == 3 || idx == 6 )
cf2_glyphpath_curveTo( &glyphPath,
flexStore[0],
flexStore[1],
flexStore[2],
flexStore[3],
flexStore[4],
flexStore[5] );
}
}
break;
case 3: /* change hints */
if ( arg_cnt != 1 )
goto Unexpected_OtherSubr;
if ( initial_map_ready )
{
/* do not clear hints if initial hintmap */
/* is not ready - we need to collate all */
cf2_arrstack_clear( &vStemHintArray );
cf2_arrstack_clear( &hStemHintArray );
cf2_hintmask_init( &hintMask, error );
hintMask.isValid = FALSE;
hintMask.isNew = TRUE;
}
known_othersubr_result_cnt = 1;
break;
case 12:
case 13:
/* counter control hints, clear stack */
cf2_stack_clear( opStack );
break;
case 14:
case 15:
case 16:
case 17:
case 18: /* multiple masters */
{
PS_Blend blend = decoder->blend;
FT_UInt num_points, nn, mm;
CF2_UInt delta;
CF2_UInt values;
if ( !blend )
{
FT_ERROR((
"cf2_interpT2CharString:"
" unexpected multiple masters operator\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
num_points = (FT_UInt)subr_no - 13 +
( subr_no == 18 );
if ( arg_cnt != (FT_Int)( num_points *
blend->num_designs ) )
{
FT_ERROR((
"cf2_interpT2CharString:"
" incorrect number of multiple masters arguments\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
/* We want to compute */
/* */
/* a0*w0 + a1*w1 + ... + ak*wk */
/* */
/* but we only have a0, a1-a0, a2-a0, ..., ak-a0. */
/* */
/* However, given that w0 + w1 + ... + wk == 1, we */
/* can rewrite it easily as */
/* */
/* a0 + (a1-a0)*w1 + (a2-a0)*w2 + ... + (ak-a0)*wk */
/* */
/* where k == num_designs-1. */
/* */
/* I guess that's why it's written in this `compact' */
/* form. */
/* */
delta = opIdx + num_points;
values = opIdx;
for ( nn = 0; nn < num_points; nn++ )
{
CF2_Fixed tmp = cf2_stack_getReal( opStack,
values );
for ( mm = 1; mm < blend->num_designs; mm++ )
tmp = ADD_INT32( tmp,
FT_MulFix(
cf2_stack_getReal( opStack,
delta++ ),
blend->weight_vector[mm] ) );
cf2_stack_setReal( opStack, values++, tmp );
}
cf2_stack_pop( opStack,
(CF2_UInt)arg_cnt - num_points );
known_othersubr_result_cnt = (FT_Int)num_points;
break;
}
case 19:
/* <idx> 1 19 callothersubr */
/* ==> replace elements starting from index */
/* cvi( <idx> ) of BuildCharArray with */
/* WeightVector */
{
FT_UInt idx;
PS_Blend blend = decoder->blend;
if ( arg_cnt != 1 || !blend )
goto Unexpected_OtherSubr;
idx = (FT_UInt)cf2_stack_popInt( opStack );
if ( idx + blend->num_designs >
decoder->len_buildchar )
goto Unexpected_OtherSubr;
ft_memcpy( &decoder->buildchar[idx],
blend->weight_vector,
blend->num_designs *
sizeof ( blend->weight_vector[0] ) );
}
break;
case 20:
/* <arg1> <arg2> 2 20 callothersubr pop */
/* ==> push <arg1> + <arg2> onto T1 stack */
{
CF2_F16Dot16 summand1;
CF2_F16Dot16 summand2;
if ( arg_cnt != 2 )
goto Unexpected_OtherSubr;
summand2 = cf2_stack_popFixed( opStack );
summand1 = cf2_stack_popFixed( opStack );
cf2_stack_pushFixed( opStack,
ADD_INT32( summand1,
summand2 ) );
known_othersubr_result_cnt = 1;
}
break;
case 21:
/* <arg1> <arg2> 2 21 callothersubr pop */
/* ==> push <arg1> - <arg2> onto T1 stack */
{
CF2_F16Dot16 minuend;
CF2_F16Dot16 subtrahend;
if ( arg_cnt != 2 )
goto Unexpected_OtherSubr;
subtrahend = cf2_stack_popFixed( opStack );
minuend = cf2_stack_popFixed( opStack );
cf2_stack_pushFixed( opStack,
SUB_INT32( minuend,
subtrahend ) );
known_othersubr_result_cnt = 1;
}
break;
case 22:
/* <arg1> <arg2> 2 22 callothersubr pop */
/* ==> push <arg1> * <arg2> onto T1 stack */
{
CF2_F16Dot16 factor1;
CF2_F16Dot16 factor2;
if ( arg_cnt != 2 )
goto Unexpected_OtherSubr;
factor2 = cf2_stack_popFixed( opStack );
factor1 = cf2_stack_popFixed( opStack );
cf2_stack_pushFixed( opStack,
FT_MulFix( factor1, factor2 ) );
known_othersubr_result_cnt = 1;
}
break;
case 23:
/* <arg1> <arg2> 2 23 callothersubr pop */
/* ==> push <arg1> / <arg2> onto T1 stack */
{
CF2_F16Dot16 dividend;
CF2_F16Dot16 divisor;
if ( arg_cnt != 2 )
goto Unexpected_OtherSubr;
divisor = cf2_stack_popFixed( opStack );
dividend = cf2_stack_popFixed( opStack );
if ( divisor == 0 )
goto Unexpected_OtherSubr;
cf2_stack_pushFixed( opStack,
FT_DivFix( dividend,
divisor ) );
known_othersubr_result_cnt = 1;
}
break;
case 24:
/* <val> <idx> 2 24 callothersubr */
/* ==> set BuildCharArray[cvi( <idx> )] = <val> */
{
CF2_UInt idx;
PS_Blend blend = decoder->blend;
if ( arg_cnt != 2 || !blend )
goto Unexpected_OtherSubr;
idx = (CF2_UInt)cf2_stack_popInt( opStack );
if ( idx >= decoder->len_buildchar )
goto Unexpected_OtherSubr;
decoder->buildchar[idx] =
cf2_stack_popFixed( opStack );
}
break;
case 25:
/* <idx> 1 25 callothersubr pop */
/* ==> push BuildCharArray[cvi( idx )] */
/* onto T1 stack */
{
CF2_UInt idx;
PS_Blend blend = decoder->blend;
if ( arg_cnt != 1 || !blend )
goto Unexpected_OtherSubr;
idx = (CF2_UInt)cf2_stack_popInt( opStack );
if ( idx >= decoder->len_buildchar )
goto Unexpected_OtherSubr;
cf2_stack_pushFixed( opStack,
decoder->buildchar[idx] );
known_othersubr_result_cnt = 1;
}
break;
#if 0
case 26:
/* <val> mark <idx> */
/* ==> set BuildCharArray[cvi( <idx> )] = <val>, */
/* leave mark on T1 stack */
/* <val> <idx> */
/* ==> set BuildCharArray[cvi( <idx> )] = <val> */
XXX which routine has left its mark on the
XXX (PostScript) stack?;
break;
#endif
case 27:
/* <res1> <res2> <val1> <val2> 4 27 callothersubr pop */
/* ==> push <res1> onto T1 stack if <val1> <= <val2>, */
/* otherwise push <res2> */
{
CF2_F16Dot16 arg1;
CF2_F16Dot16 arg2;
CF2_F16Dot16 cond1;
CF2_F16Dot16 cond2;
if ( arg_cnt != 4 )
goto Unexpected_OtherSubr;
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 );
known_othersubr_result_cnt = 1;
}
break;
case 28:
/* 0 28 callothersubr pop */
/* ==> push random value from interval [0, 1) */
/* onto stack */
{
CF2_F16Dot16 r;
if ( arg_cnt != 0 )
goto Unexpected_OtherSubr;
/* only use the lower 16 bits of `random' */
/* to generate a number in the range (0;1] */
r = (CF2_F16Dot16)
( ( decoder->current_subfont->random & 0xFFFF ) + 1 );
decoder->current_subfont->random =
cff_random( decoder->current_subfont->random );
cf2_stack_pushFixed( opStack, r );
known_othersubr_result_cnt = 1;
}
break;
default:
if ( arg_cnt >= 0 && subr_no >= 0 )
{
FT_Int i;
FT_ERROR((
"cf2_interpT2CharString (Type 1 mode):"
" unknown othersubr [%d %d], wish me luck\n",
arg_cnt, subr_no ));
/* store the unused args */
/* for this unhandled OtherSubr */
if ( arg_cnt > PS_STORAGE_SIZE )
arg_cnt = PS_STORAGE_SIZE;
result_cnt = arg_cnt;
for ( i = 1; i <= arg_cnt; i++ )
results[result_cnt - i] =
cf2_stack_popFixed( opStack );
break;
}
/* fall through */
Unexpected_OtherSubr:
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" invalid othersubr [%d %d]\n",
arg_cnt, subr_no ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
}
continue; /* do not clear the stack */
case cf2_escPOP:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else
{
FT_TRACE4(( " pop" ));
if ( known_othersubr_result_cnt > 0 )
{
known_othersubr_result_cnt--;
/* ignore, we pushed the operands ourselves */
continue;
}
if ( result_cnt == 0 )
{
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" no more operands for othersubr\n" ));
lastError = FT_THROW( Invalid_Glyph_Format );
goto exit;
}
result_cnt--;
cf2_stack_pushFixed( opStack, results[result_cnt] );
}
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_UInt idx;
FT_TRACE4(( " put\n" ));
idx = (CF2_UInt)cf2_stack_popInt( opStack );
val = cf2_stack_popFixed( opStack );
if ( idx < CF2_STORAGE_SIZE )
storage[idx] = val;
}
continue; /* do not clear the stack */
case cf2_escGET:
{
CF2_UInt idx;
FT_TRACE4(( " get\n" ));
idx = (CF2_UInt)cf2_stack_popInt( opStack );
if ( 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 */
{
CF2_F16Dot16 r;
FT_TRACE4(( " random\n" ));
/* only use the lower 16 bits of `random' */
/* to generate a number in the range (0;1] */
r = (CF2_F16Dot16)
( ( decoder->current_subfont->random & 0xFFFF ) + 1 );
decoder->current_subfont->random =
cff_random( decoder->current_subfont->random );
cf2_stack_pushFixed( opStack, r );
}
continue; /* do not clear the stack */
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 )
{
/* use a start value that doesn't make */
/* the algorithm's addition overflow */
FT_Fixed root = arg < 10 ? arg : arg >> 1;
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 */
case cf2_escSETCURRENTPT:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (12, %d)\n", op2 ));
else
{
FT_TRACE4(( " setcurrentpoint" ));
if ( !initial_map_ready )
break;
/* From the T1 specification, section 6.4: */
/* */
/* The setcurrentpoint command is used only in */
/* conjunction with results from OtherSubrs */
/* procedures. */
/* known_othersubr_result_cnt != 0 is already handled */
/* above. */
/* Note, however, that both Ghostscript and Adobe */
/* Distiller handle this situation by silently */
/* ignoring the inappropriate `setcurrentpoint' */
/* instruction. So we do the same. */
#if 0
if ( decoder->flex_state != 1 )
{
FT_ERROR(( "cf2_interpT2CharString:"
" unexpected `setcurrentpoint'\n" ));
goto Syntax_Error;
}
else
...
#endif
curY = cf2_stack_popFixed( opStack );
curX = cf2_stack_popFixed( opStack );
decoder->flex_state = 0;
}
break;
} /* end of 2nd switch checking op2 */
}
}
} /* end of 1st switch checking op2 */
} /* case cf2_cmdESC */
break;
case cf2_cmdHSBW:
if ( !font->isT1 )
FT_TRACE4(( " unknown op (%d)\n", op1 ));
else
{
CF2_Fixed lsb_x;
PS_Builder* builder;
FT_TRACE4(( " hsbw\n" ));
builder = &decoder->builder;
builder->advance->x = cf2_stack_popFixed( opStack );
builder->advance->y = 0;
lsb_x = cf2_stack_popFixed( opStack );
builder->left_bearing->x = ADD_INT32( builder->left_bearing->x,
lsb_x );
haveWidth = TRUE;
/* the `metrics_only' indicates that we only want to compute */
/* the glyph's metrics (lsb + advance width), not load the */
/* rest of it; so exit immediately */
if ( builder->metrics_only )
goto exit;
if ( initial_map_ready )
curX = ADD_INT32( curX, lsb_x );
}
break;
case cf2_cmdENDCHAR:
FT_TRACE4(( " endchar\n" ));
if ( font->isT1 && !initial_map_ready )
{
FT_TRACE5(( "cf2_interpT2CharString (Type 1 mode): "
"Build initial hintmap, rewinding...\n" ));
/* trigger initial hintmap build */
cf2_glyphpath_moveTo( &glyphPath, curX, curY );
initial_map_ready = TRUE;
/* change hints routine - clear for rewind */
cf2_arrstack_clear( &vStemHintArray );
cf2_arrstack_clear( &hStemHintArray );
cf2_hintmask_init( &hintMask, error );
hintMask.isValid = FALSE;
hintMask.isNew = TRUE;
/* rewind charstring */
/* some charstrings use endchar from a final subroutine call */
/* without returning, detect these and exit to the top level */
/* charstring */
while ( charstringIndex > 0 )
{
FT_TRACE4(( " return (leaving level %d)\n", charstringIndex ));
/* restore position in previous charstring */
charstring = (CF2_Buffer)
cf2_arrstack_getPointer(
&subrStack,
(CF2_UInt)--charstringIndex );
}
charstring->ptr = charstring->start;
break;
}
if ( cf2_stack_count( opStack ) == 1 ||
cf2_stack_count( opStack ) == 5 )
{
if ( !haveWidth )
*width = ADD_INT32( cf2_stack_getReal( opStack, 0 ),
nominalWidthX );
}
/* width is defined or default after this */
haveWidth = TRUE;
if ( decoder->width_only )
goto exit;
/* close path if still open */
cf2_glyphpath_closeOpenPath( &glyphPath );
/* disable seac for CFF2 and Type1 */
/* (charstring ending with args on stack) */
if ( !font->isCFF2 && !font->isT1 && 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(( "%s", 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 ( 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 ( font->isT1 && !decoder->flex_state && !haveWidth )
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" No width. Use hsbw/sbw as first op\n" ));
if ( cf2_stack_count( opStack ) > 2 && !haveWidth )
*width = ADD_INT32( cf2_stack_getReal( opStack, 0 ),
nominalWidthX );
/* width is defined or default after this */
haveWidth = TRUE;
if ( decoder->width_only )
goto exit;
curY = ADD_INT32( curY, cf2_stack_popFixed( opStack ) );
curX = ADD_INT32( curX, cf2_stack_popFixed( opStack ) );
if ( !decoder->flex_state )
cf2_glyphpath_moveTo( &glyphPath, curX, curY );
break;
case cf2_cmdHMOVETO:
FT_TRACE4(( " hmoveto\n" ));
if ( font->isT1 && !decoder->flex_state && !haveWidth )
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" No width. Use hsbw/sbw as first op\n" ));
if ( cf2_stack_count( opStack ) > 1 && !haveWidth )
*width = ADD_INT32( cf2_stack_getReal( opStack, 0 ),
nominalWidthX );
/* width is defined or default after this */
haveWidth = TRUE;
if ( decoder->width_only )
goto exit;
curX = ADD_INT32( curX, cf2_stack_popFixed( opStack ) );
if ( !decoder->flex_state )
cf2_glyphpath_moveTo( &glyphPath, curX, curY );
break;
case cf2_cmdRLINECURVE:
{
CF2_UInt count = cf2_stack_count( opStack );
CF2_UInt idx = 0;
FT_TRACE4(( " rlinecurve\n" ));
while ( idx + 6 < count )
{
curX = ADD_INT32( curX, cf2_stack_getReal( opStack,
idx + 0 ) );
curY = ADD_INT32( curY, cf2_stack_getReal( opStack,
idx + 1 ) );
cf2_glyphpath_lineTo( &glyphPath, curX, curY );
idx += 2;
}
while ( idx < count )
{
CF2_Fixed x1, y1, x2, y2, x3, y3;
x1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 0 ), curX );
y1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 1 ), curY );
x2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 2 ), x1 );
y2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 3 ), y1 );
x3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 4 ), x2 );
y3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 5 ), y2 );
cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 );
curX = x3;
curY = y3;
idx += 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 idx = 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 & ~2U;
idx += count1 - count;
FT_TRACE4(( " vvcurveto\n" ));
while ( idx < count )
{
CF2_Fixed x1, y1, x2, y2, x3, y3;
if ( ( count - idx ) & 1 )
{
x1 = ADD_INT32( cf2_stack_getReal( opStack, idx ), curX );
idx++;
}
else
x1 = curX;
y1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 0 ), curY );
x2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 1 ), x1 );
y2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 2 ), y1 );
x3 = x2;
y3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 3 ), y2 );
cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 );
curX = x3;
curY = y3;
idx += 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 idx = 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 & ~2U;
idx += count1 - count;
FT_TRACE4(( " hhcurveto\n" ));
while ( idx < count )
{
CF2_Fixed x1, y1, x2, y2, x3, y3;
if ( ( count - idx ) & 1 )
{
y1 = ADD_INT32( cf2_stack_getReal( opStack, idx ), curY );
idx++;
}
else
y1 = curY;
x1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 0 ), curX );
x2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 1 ), x1 );
y2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 2 ), y1 );
x3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 3 ), x2 );
y3 = y2;
cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 );
curX = x3;
curY = y3;
idx += 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 idx = 0;
FT_Bool alternate = FT_BOOL( 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 & ~2U;
idx += count1 - count;
FT_TRACE4(( "%s\n", alternate ? " hvcurveto" : " vhcurveto" ));
while ( idx < count )
{
CF2_Fixed x1, x2, x3, y1, y2, y3;
if ( alternate )
{
x1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 0 ), curX );
y1 = curY;
x2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 1 ), x1 );
y2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 2 ), y1 );
y3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 3 ), y2 );
if ( count - idx == 5 )
{
x3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 4 ), x2 );
idx++;
}
else
x3 = x2;
alternate = FALSE;
}
else
{
x1 = curX;
y1 = ADD_INT32( cf2_stack_getReal( opStack, idx + 0 ), curY );
x2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 1 ), x1 );
y2 = ADD_INT32( cf2_stack_getReal( opStack, idx + 2 ), y1 );
x3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 3 ), x2 );
if ( count - idx == 5 )
{
y3 = ADD_INT32( cf2_stack_getReal( opStack, idx + 4 ), y2 );
idx++;
}
else
y3 = y2;
alternate = TRUE;
}
cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 );
curX = x3;
curY = y3;
idx += 4;
}
cf2_stack_clear( opStack );
}
continue; /* no need to clear stack again */
case cf2_cmdEXTENDEDNMBR:
{
CF2_Int v;
CF2_Int byte1 = cf2_buf_readByte( charstring );
CF2_Int byte2 = cf2_buf_readByte( charstring );
v = (FT_Short)( ( byte1 << 8 ) |
byte2 );
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;
FT_UInt32 byte1 = (FT_UInt32)cf2_buf_readByte( charstring );
FT_UInt32 byte2 = (FT_UInt32)cf2_buf_readByte( charstring );
FT_UInt32 byte3 = (FT_UInt32)cf2_buf_readByte( charstring );
FT_UInt32 byte4 = (FT_UInt32)cf2_buf_readByte( charstring );
v = (CF2_Fixed)( ( byte1 << 24 ) |
( byte2 << 16 ) |
( byte3 << 8 ) |
byte4 );
/*
* For Type 1:
*
* According to the specification, values > 32000 or < -32000
* must be followed by a `div' operator to make the result be
* in the range [-32000;32000]. We expect that the second
* argument of `div' is not a large number. Additionally, we
* don't handle stuff like `<large1> <large2> <num> div <num>
* div' or <large1> <large2> <num> div div'. This is probably
* not allowed anyway.
*
* <large> <num> <num>+ div is not checked but should not be
* allowed as the large value remains untouched.
*
*/
if ( font->isT1 )
{
if ( v > 32000 || v < -32000 )
{
if ( large_int )
FT_ERROR(( "cf2_interpT2CharString (Type 1 mode):"
" no `div' after large integer\n" ));
else
large_int = TRUE;
}
FT_TRACE4(( " %d", v ));
cf2_stack_pushInt( opStack, (CF2_Int)v );
}
else
{
FT_TRACE4(( " %.5fF", 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 );
if ( *error )
FT_TRACE4(( "charstring error %d\n", *error ));
/* 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 */