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[freetype2] master 950f169 2/4: [cff] Implement missing operators in new
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From: |
Werner LEMBERG |
|
Subject: |
[freetype2] master 950f169 2/4: [cff] Implement missing operators in new engine (except `random'). |
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Date: |
Sun, 07 Feb 2016 10:43:21 +0000 |
branch: master
commit 950f16969e18307e7373fa3c64e51b1c44d0b754
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>
[cff] Implement missing operators in new engine (except `random').
* src/cff/cf2font.h (CF2_STORAGE_SIZE): New macro.
* src/cff/cf2intrp.c (cf2_interpT2CharString): Implement the
following operators: abs, add, and, div, drop, dup, eq, exch, get,
ifelse, index, mul, neg, not, or, put, roll, sqrt, sub.
* src/cff/cf2stack.h, src/cff/cf2stack.c (cf2_stack_roll): New
auxiliary function for `roll' operator.
---
ChangeLog | 13 ++
src/cff/cf2font.h | 1 +
src/cff/cf2intrp.c | 344 ++++++++++++++++++++++++++++++++++++++++------------
src/cff/cf2stack.c | 84 +++++++++++++-
src/cff/cf2stack.h | 5 +
5 files changed, 369 insertions(+), 78 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 63403ee..42f93b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2016-02-07 Werner Lemberg <address@hidden>
+
+ [cff] Implement missing operators in new engine (except `random').
+
+ * src/cff/cf2font.h (CF2_STORAGE_SIZE): New macro.
+
+ * src/cff/cf2intrp.c (cf2_interpT2CharString): Implement the
+ following operators: abs, add, and, div, drop, dup, eq, exch, get,
+ ifelse, index, mul, neg, not, or, put, roll, sqrt, sub.
+
+ * src/cff/cf2stack.h, src/cff/cf2stack.c (cf2_stack_roll): New
+ auxiliary function for `roll' operator.
+
2016-02-06 Werner Lemberg <address@hidden>
[cff] Fix some Type 2 operators in old CFF engine.
diff --git a/src/cff/cf2font.h b/src/cff/cf2font.h
index 8e7df67..bd05e69 100644
--- a/src/cff/cf2font.h
+++ b/src/cff/cf2font.h
@@ -54,6 +54,7 @@ FT_BEGIN_HEADER
/* (Hiragino Kaku Gothic ProN W3; */
/* 8.2d6e1; 2014-12-19) that exceed */
/* this limit */
+#define CF2_STORAGE_SIZE 32
/* typedef is in `cf2glue.h' */
diff --git a/src/cff/cf2intrp.c b/src/cff/cf2intrp.c
index c02a3bf..7d663dd 100644
--- a/src/cff/cf2intrp.c
+++ b/src/cff/cf2intrp.c
@@ -447,6 +447,8 @@
CF2_Stack opStack = NULL;
FT_Byte op1; /* first opcode byte */
+ CF2_F16Dot16 storage[CF2_STORAGE_SIZE]; /* for `put' and `get' */
+
/* instruction limit; 20,000,000 matches Avalon */
FT_UInt32 instructionLimit = 20000000UL;
@@ -834,84 +836,189 @@
break;
- /* TODO: should these operators be supported? */
- case cf2_escAND: /* in spec */
- FT_TRACE4(( " and\n" ));
+ case cf2_escAND:
+ {
+ CF2_F16Dot16 arg1;
+ CF2_F16Dot16 arg2;
- CF2_FIXME;
- break;
- case cf2_escOR: /* in spec */
- FT_TRACE4(( " or\n" ));
+ FT_TRACE4(( " and\n" ));
- CF2_FIXME;
- break;
+ arg2 = cf2_stack_popFixed( opStack );
+ arg1 = cf2_stack_popFixed( opStack );
- case cf2_escNOT: /* in spec */
- FT_TRACE4(( " not\n" ));
+ cf2_stack_pushInt( opStack, arg1 && arg2 );
+ }
+ continue; /* do not clear the stack */
- CF2_FIXME;
- break;
+ case cf2_escOR:
+ {
+ CF2_F16Dot16 arg1;
+ CF2_F16Dot16 arg2;
- case cf2_escABS: /* in spec */
- FT_TRACE4(( " abs\n" ));
- CF2_FIXME;
- break;
+ FT_TRACE4(( " or\n" ));
- case cf2_escADD: /* in spec */
- FT_TRACE4(( " add\n" ));
+ arg2 = cf2_stack_popFixed( opStack );
+ arg1 = cf2_stack_popFixed( opStack );
- CF2_FIXME;
- break;
+ cf2_stack_pushInt( opStack, arg1 || arg2 );
+ }
+ continue; /* do not clear the stack */
- case cf2_escSUB: /* in spec */
- FT_TRACE4(( " sub\n" ));
+ case cf2_escNOT:
+ {
+ CF2_F16Dot16 arg;
- CF2_FIXME;
- break;
- case cf2_escDIV: /* in spec */
- FT_TRACE4(( " div\n" ));
+ FT_TRACE4(( " not\n" ));
- CF2_FIXME;
- break;
+ arg = cf2_stack_popFixed( opStack );
- case cf2_escNEG: /* in spec */
- FT_TRACE4(( " neg\n" ));
+ cf2_stack_pushInt( opStack, !arg );
+ }
+ continue; /* do not clear the stack */
- CF2_FIXME;
- break;
+ case cf2_escABS:
+ {
+ CF2_F16Dot16 arg;
- case cf2_escEQ: /* in spec */
- FT_TRACE4(( " eq\n" ));
- CF2_FIXME;
- break;
+ FT_TRACE4(( " abs\n" ));
+
+ arg = cf2_stack_popFixed( opStack );
- case cf2_escDROP: /* in spec */
+ 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, 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, minuend - subtrahend );
+ }
+ continue; /* do not clear the stack */
+
+ case cf2_escDIV:
+ {
+ CF2_F16Dot16 dividend;
+ CF2_F16Dot16 divisor;
+
+
+ FT_TRACE4(( " div\n" ));
+
+ 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 );
+
+ 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_escDROP:
FT_TRACE4(( " drop\n" ));
- CF2_FIXME;
- break;
+ (void)cf2_stack_popFixed( opStack );
+ continue; /* do not clear the stack */
- case cf2_escPUT: /* in spec */
- FT_TRACE4(( " put\n" ));
+ case cf2_escPUT:
+ {
+ CF2_F16Dot16 val;
+ CF2_Int idx;
- CF2_FIXME;
- break;
- case cf2_escGET: /* in spec */
- FT_TRACE4(( " get\n" ));
+ FT_TRACE4(( " put\n" ));
- CF2_FIXME;
- break;
+ idx = cf2_stack_popInt( opStack );
+ val = cf2_stack_popFixed( opStack );
- case cf2_escIFELSE: /* in spec */
- FT_TRACE4(( " ifelse\n" ));
+ if ( idx >= 0 && idx < CF2_STORAGE_SIZE )
+ storage[idx] = val;
+ }
+ continue; /* do not clear the stack */
- CF2_FIXME;
- break;
+ case cf2_escGET:
+ {
+ CF2_Int idx;
+
+
+ FT_TRACE4(( " get\n" ));
+
+ idx = cf2_stack_popInt( opStack );
+
+ if ( idx >= 0 && idx < CF2_STORAGE_SIZE )
+ cf2_stack_pushFixed( opStack, storage[idx] );
+ }
+ continue; /* do not clear the stack */
+
+ case cf2_escIFELSE:
+ {
+ CF2_F16Dot16 arg1;
+ CF2_F16Dot16 arg2;
+ CF2_F16Dot16 cond1;
+ CF2_F16Dot16 cond2;
+
+
+ FT_TRACE4(( " ifelse\n" ));
+
+ cond2 = cf2_stack_popFixed( opStack );
+ cond1 = cf2_stack_popFixed( opStack );
+ arg2 = cf2_stack_popFixed( opStack );
+ arg1 = cf2_stack_popFixed( opStack );
+
+ cf2_stack_pushFixed( opStack, cond1 <= cond2 ? arg1 : arg2 );
+ }
+ continue; /* do not clear the stack */
case cf2_escRANDOM: /* in spec */
FT_TRACE4(( " random\n" ));
@@ -919,41 +1026,126 @@
CF2_FIXME;
break;
- case cf2_escMUL: /* in spec */
- FT_TRACE4(( " mul\n" ));
+ case cf2_escMUL:
+ {
+ CF2_F16Dot16 factor1;
+ CF2_F16Dot16 factor2;
- CF2_FIXME;
- break;
- case cf2_escSQRT: /* in spec */
- FT_TRACE4(( " sqrt\n" ));
+ FT_TRACE4(( " mul\n" ));
- CF2_FIXME;
- break;
+ factor2 = cf2_stack_popFixed( opStack );
+ factor1 = cf2_stack_popFixed( opStack );
- case cf2_escDUP: /* in spec */
- FT_TRACE4(( " dup\n" ));
+ cf2_stack_pushFixed( opStack, FT_MulFix( factor1, factor2 ) );
+ }
+ continue; /* do not clear the stack */
- CF2_FIXME;
- break;
+ case cf2_escSQRT:
+ {
+ CF2_F16Dot16 arg;
- case cf2_escEXCH: /* in spec */
- FT_TRACE4(( " exch\n" ));
- CF2_FIXME;
- break;
+ FT_TRACE4(( " sqrt\n" ));
- case cf2_escINDEX: /* in spec */
- FT_TRACE4(( " index\n" ));
+ arg = cf2_stack_popFixed( opStack );
+ if ( arg > 0 )
+ {
+ FT_Fixed root = arg;
+ FT_Fixed new_root;
+
+
+ /* Babylonian method */
+ for (;;)
+ {
+ new_root = ( root + FT_DivFix( arg, root ) + 1 ) >> 1;
+ if ( new_root == root )
+ break;
+ root = new_root;
+ }
+ arg = new_root;
+ }
+ else
+ arg = 0;
- CF2_FIXME;
- break;
+ cf2_stack_pushFixed( opStack, arg );
+ }
+ continue; /* do not clear the stack */
- case cf2_escROLL: /* in spec */
- FT_TRACE4(( " roll\n" ));
+ case cf2_escDUP:
+ {
+ CF2_F16Dot16 arg;
- CF2_FIXME;
- break;
+
+ 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_escHFLEX:
{
diff --git a/src/cff/cf2stack.c b/src/cff/cf2stack.c
index 8332b5d..6fafd90 100644
--- a/src/cff/cf2stack.c
+++ b/src/cff/cf2stack.c
@@ -145,7 +145,7 @@
/* Note: type mismatch is silently cast */
- /* TODO: check this */
+ /* TODO: check this */
FT_LOCAL_DEF( CF2_Fixed )
cf2_stack_popFixed( CF2_Stack stack )
{
@@ -170,7 +170,7 @@
/* Note: type mismatch is silently cast */
- /* TODO: check this */
+ /* TODO: check this */
FT_LOCAL_DEF( CF2_Fixed )
cf2_stack_getReal( CF2_Stack stack,
CF2_UInt idx )
@@ -195,6 +195,86 @@
}
+ FT_LOCAL( void )
+ cf2_stack_roll( CF2_Stack stack,
+ CF2_Int count,
+ CF2_Int shift )
+ {
+ /* we initialize this variable to avoid compiler warnings */
+ CF2_StackNumber last = { { 0 }, CF2_NumberInt };
+
+ CF2_Int start_idx, idx, i;
+
+
+ if ( count < 2 )
+ return; /* nothing to do (values 0 and 1), or undefined value */
+
+ if ( (CF2_UInt)count > cf2_stack_count( stack ) )
+ {
+ CF2_SET_ERROR( stack->error, Stack_Overflow );
+ return;
+ }
+
+ if ( shift < 0 )
+ shift = -( ( -shift ) % count );
+ else
+ shift %= count;
+
+ if ( shift == 0 )
+ return; /* nothing to do */
+
+ /* We use the following algorithm to do the rolling, */
+ /* which needs two temporary variables only. */
+ /* */
+ /* Example: */
+ /* */
+ /* count = 8 */
+ /* shift = 2 */
+ /* */
+ /* stack indices before roll: 7 6 5 4 3 2 1 0 */
+ /* stack indices after roll: 1 0 7 6 5 4 3 2 */
+ /* */
+ /* The value of index 0 gets moved to index 2, while */
+ /* the old value of index 2 gets moved to index 4, */
+ /* and so on. We thus have the following copying */
+ /* chains for shift value 2. */
+ /* */
+ /* 0 -> 2 -> 4 -> 6 -> 0 */
+ /* 1 -> 3 -> 5 -> 7 -> 1 */
+ /* */
+ /* If `count' and `shift' are incommensurable, we */
+ /* have a single chain only. Otherwise, increase */
+ /* the start index by 1 after the first chain, then */
+ /* do the next chain until all elements in all */
+ /* chains are handled. */
+
+ start_idx = -1;
+ idx = -1;
+ for ( i = 0; i < count; i++ )
+ {
+ CF2_StackNumber tmp;
+
+
+ if ( start_idx == idx )
+ {
+ start_idx++;
+ idx = start_idx;
+ last = stack->buffer[idx];
+ }
+
+ idx += shift;
+ if ( idx >= count )
+ idx -= count;
+ else if ( idx < 0 )
+ idx += count;
+
+ tmp = stack->buffer[idx];
+ stack->buffer[idx] = last;
+ last = tmp;
+ }
+ }
+
+
FT_LOCAL_DEF( void )
cf2_stack_clear( CF2_Stack stack )
{
diff --git a/src/cff/cf2stack.h b/src/cff/cf2stack.h
index 8c7861d..e740a7a 100644
--- a/src/cff/cf2stack.h
+++ b/src/cff/cf2stack.h
@@ -94,6 +94,11 @@ FT_BEGIN_HEADER
CF2_UInt idx );
FT_LOCAL( void )
+ cf2_stack_roll( CF2_Stack stack,
+ CF2_Int count,
+ CF2_Int idx );
+
+ FT_LOCAL( void )
cf2_stack_clear( CF2_Stack stack );
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- [freetype2] master 950f169 2/4: [cff] Implement missing operators in new engine (except `random').,
Werner LEMBERG <=