diff options
Diffstat (limited to 'src/truetype/ttinterp.c')
| -rw-r--r-- | src/truetype/ttinterp.c | 85 |
1 files changed, 31 insertions, 54 deletions
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c index 731095ed0..4fcfaa3e4 100644 --- a/src/truetype/ttinterp.c +++ b/src/truetype/ttinterp.c @@ -4,7 +4,7 @@ * * TrueType bytecode interpreter (body). * - * Copyright (C) 1996-2021 by + * Copyright (C) 1996-2023 by * David Turner, Robert Wilhelm, and Werner Lemberg. * * This file is part of the FreeType project, and may only be used, @@ -1527,9 +1527,8 @@ static void Modify_CVT_Check( TT_ExecContext exc ) { - /* TT_RunIns sets origCvt and restores cvt to origCvt when done. */ if ( exc->iniRange == tt_coderange_glyph && - exc->cvt == exc->origCvt ) + exc->cvt != exc->glyfCvt ) { exc->error = Update_Max( exc->memory, &exc->glyfCvtSize, @@ -3115,10 +3114,8 @@ } else { - /* TT_RunIns sets origStorage and restores storage to origStorage */ - /* when done. */ if ( exc->iniRange == tt_coderange_glyph && - exc->storage == exc->origStorage ) + exc->storage != exc->glyfStorage ) { FT_ULong tmp = (FT_ULong)exc->glyfStoreSize; @@ -5260,16 +5257,21 @@ } } - exc->GS.instruct_control &= ~(FT_Byte)Kf; - exc->GS.instruct_control |= (FT_Byte)L; + /* INSTCTRL should only be used in the CVT program */ + if ( exc->iniRange == tt_coderange_cvt ) + { + exc->GS.instruct_control &= ~(FT_Byte)Kf; + exc->GS.instruct_control |= (FT_Byte)L; + } - if ( K == 3 ) + /* except to change the subpixel flags temporarily */ + else if ( exc->iniRange == tt_coderange_glyph && K == 3 ) { #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY /* INSTCTRL modifying flag 3 also has an effect */ /* outside of the CVT program */ if ( SUBPIXEL_HINTING_INFINALITY ) - exc->ignore_x_mode = FT_BOOL( L == 4 ); + exc->ignore_x_mode = !FT_BOOL( L == 4 ); #endif #ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL @@ -5280,6 +5282,8 @@ exc->backward_compatibility = !FT_BOOL( L == 4 ); #endif } + else if ( exc->pedantic_hinting ) + exc->error = FT_THROW( Invalid_Reference ); } @@ -6867,7 +6871,7 @@ static void - _iup_worker_shift( IUP_Worker worker, + iup_worker_shift_( IUP_Worker worker, FT_UInt p1, FT_UInt p2, FT_UInt p ) @@ -6889,7 +6893,7 @@ static void - _iup_worker_interpolate( IUP_Worker worker, + iup_worker_interpolate_( IUP_Worker worker, FT_UInt p1, FT_UInt p2, FT_UInt ref1, @@ -7083,7 +7087,7 @@ { if ( ( exc->pts.tags[point] & mask ) != 0 ) { - _iup_worker_interpolate( &V, + iup_worker_interpolate_( &V, cur_touched + 1, point - 1, cur_touched, @@ -7095,17 +7099,17 @@ } if ( cur_touched == first_touched ) - _iup_worker_shift( &V, first_point, end_point, cur_touched ); + iup_worker_shift_( &V, first_point, end_point, cur_touched ); else { - _iup_worker_interpolate( &V, + iup_worker_interpolate_( &V, (FT_UShort)( cur_touched + 1 ), end_point, cur_touched, first_touched ); if ( first_touched > 0 ) - _iup_worker_interpolate( &V, + iup_worker_interpolate_( &V, first_point, first_touched - 1, cur_touched, @@ -7755,35 +7759,6 @@ #endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */ -#ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY - exc->iup_called = FALSE; -#endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */ - -#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL - /* - * Toggle backward compatibility according to what font wants, except - * when - * - * 1) we have a `tricky' font that heavily relies on the interpreter to - * render glyphs correctly, for example DFKai-SB, or - * 2) FT_RENDER_MODE_MONO (i.e, monochome rendering) is requested. - * - * In those cases, backward compatibility needs to be turned off to get - * correct rendering. The rendering is then completely up to the - * font's programming. - * - */ - if ( SUBPIXEL_HINTING_MINIMAL && - exc->subpixel_hinting_lean && - !FT_IS_TRICKY( &exc->face->root ) ) - exc->backward_compatibility = !( exc->GS.instruct_control & 4 ); - else - exc->backward_compatibility = FALSE; - - exc->iupx_called = FALSE; - exc->iupy_called = FALSE; -#endif - /* We restrict the number of twilight points to a reasonable, */ /* heuristic value to avoid slow execution of malformed bytecode. */ num_twilight_points = FT_MAX( 30, @@ -7854,13 +7829,20 @@ exc->func_move_cvt = Move_CVT; } - exc->origCvt = exc->cvt; - exc->origStorage = exc->storage; exc->iniRange = exc->curRange; Compute_Funcs( exc ); Compute_Round( exc, (FT_Byte)exc->GS.round_state ); + /* These flags cancel execution of some opcodes after IUP is called */ +#ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY + exc->iup_called = FALSE; +#endif +#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL + exc->iupx_called = FALSE; + exc->iupy_called = FALSE; +#endif + do { exc->opcode = exc->code[exc->IP]; @@ -8583,7 +8565,8 @@ /* increment instruction counter and check if we didn't */ /* run this program for too long (e.g. infinite loops). */ - if ( ++ins_counter > TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES ) { + if ( ++ins_counter > TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES ) + { exc->error = FT_THROW( Execution_Too_Long ); goto LErrorLabel_; } @@ -8606,9 +8589,6 @@ ins_counter, ins_counter == 1 ? "" : "s" )); - exc->cvt = exc->origCvt; - exc->storage = exc->origStorage; - return FT_Err_Ok; LErrorCodeOverflow_: @@ -8618,9 +8598,6 @@ if ( exc->error && !exc->instruction_trap ) FT_TRACE1(( " The interpreter returned error 0x%x\n", exc->error )); - exc->cvt = exc->origCvt; - exc->storage = exc->origStorage; - return exc->error; } |