linphone-ffmpeg-anyka37e

/***************************************************************************/ /* */ /* ttinterp.c */ /* */ /* TrueType bytecode interpreter (body). */ /* */ /* Copyright 1996-2018 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ /* Greg Hitchcock from Microsoft has helped a lot in resolving unclear */ /* issues; many thanks! */ #include <ft2build.h> #include FT_INTERNAL_DEBUG_H #include FT_INTERNAL_CALC_H #include FT_TRIGONOMETRY_H #include FT_SYSTEM_H #include FT_DRIVER_H #include FT_MULTIPLE_MASTERS_H #include "ttinterp.h" #include "tterrors.h" #include "ttsubpix.h" #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT #include "ttgxvar.h" #endif #ifdef TT_USE_BYTECODE_INTERPRETER /*************************************************************************/ /* */ /* 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_ttinterp #define NO_SUBPIXEL_HINTING \ ( ((TT_Driver)FT_FACE_DRIVER( exc->face ))->interpreter_version == \ TT_INTERPRETER_VERSION_35 ) #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY #define SUBPIXEL_HINTING_INFINALITY \ ( ((TT_Driver)FT_FACE_DRIVER( exc->face ))->interpreter_version == \ TT_INTERPRETER_VERSION_38 ) #endif #ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL #define SUBPIXEL_HINTING_MINIMAL \ ( ((TT_Driver)FT_FACE_DRIVER( exc->face ))->interpreter_version == \ TT_INTERPRETER_VERSION_40 ) #endif #define PROJECT( v1, v2 ) \ exc->func_project( exc, \ SUB_LONG( (v1)->x, (v2)->x ), \ SUB_LONG( (v1)->y, (v2)->y ) ) #define DUALPROJ( v1, v2 ) \ exc->func_dualproj( exc, \ SUB_LONG( (v1)->x, (v2)->x ), \ SUB_LONG( (v1)->y, (v2)->y ) ) #define FAST_PROJECT( v ) \ exc->func_project( exc, (v)->x, (v)->y ) #define FAST_DUALPROJ( v ) \ exc->func_dualproj( exc, (v)->x, (v)->y ) /*************************************************************************/ /* */ /* Two simple bounds-checking macros. */ /* */ #define BOUNDS( x, n ) ( (FT_UInt)(x) >= (FT_UInt)(n) ) #define BOUNDSL( x, n ) ( (FT_ULong)(x) >= (FT_ULong)(n) ) #undef SUCCESS #define SUCCESS 0 #undef FAILURE #define FAILURE 1 /*************************************************************************/ /* */ /* CODERANGE FUNCTIONS */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Function> */ /* TT_Goto_CodeRange */ /* */ /* <Description> */ /* Switches to a new code range (updates the code related elements in */ /* `exec', and `IP'). */ /* */ /* <Input> */ /* range :: The new execution code range. */ /* */ /* IP :: The new IP in the new code range. */ /* */ /* <InOut> */ /* exec :: The target execution context. */ /* */ FT_LOCAL_DEF( void ) TT_Goto_CodeRange( TT_ExecContext exec, FT_Int range, FT_Long IP ) { TT_CodeRange* coderange; FT_ASSERT( range >= 1 && range <= 3 ); coderange = &exec->codeRangeTable[range - 1]; FT_ASSERT( coderange->base ); /* NOTE: Because the last instruction of a program may be a CALL */ /* which will return to the first byte *after* the code */ /* range, we test for IP <= Size instead of IP < Size. */ /* */ FT_ASSERT( IP <= coderange->size ); exec->code = coderange->base; exec->codeSize = coderange->size; exec->IP = IP; exec->curRange = range; } /*************************************************************************/ /* */ /* <Function> */ /* TT_Set_CodeRange */ /* */ /* <Description> */ /* Sets a code range. */ /* */ /* <Input> */ /* range :: The code range index. */ /* */ /* base :: The new code base. */ /* */ /* length :: The range size in bytes. */ /*