2018-08-17 22:13:18 +02:00
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/*
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* Copyright © 2018 Adobe Systems Incorporated.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Adobe Author(s): Michiharu Ariza
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*/
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#ifndef HB_CFF2_INTERP_CS_HH
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#define HB_CFF2_INTERP_CS_HH
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2018-08-29 22:26:17 +02:00
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#include "hb.hh"
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#include "hb-cff-interp-cs-common.hh"
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2018-08-17 22:13:18 +02:00
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namespace CFF {
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using namespace OT;
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struct CFF2CSInterpEnv : CSInterpEnv<CFF2Subrs>
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{
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inline void init (const ByteStr &str, const CFF2Subrs &globalSubrs_, const CFF2Subrs &localSubrs_)
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{
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CSInterpEnv<CFF2Subrs>::init (str, globalSubrs_, localSubrs_);
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ivs = 0;
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}
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inline bool fetch_op (OpCode &op)
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{
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2018-08-29 21:14:30 +02:00
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if (unlikely (this->substr.avail ()))
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2018-08-17 22:13:18 +02:00
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return CSInterpEnv<CFF2Subrs>::fetch_op (op);
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/* make up return or endchar op */
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2018-08-29 21:14:30 +02:00
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if (this->callStack.check_underflow ())
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2018-08-17 22:13:18 +02:00
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op = OpCode_return;
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else
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op = OpCode_endchar;
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return true;
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}
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2018-08-30 03:18:18 +02:00
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inline bool process_vsindex (void)
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{
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unsigned int index;
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if (unlikely (!argStack.check_pop_uint (index)))
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return false;
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set_ivs (index);
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return true;
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}
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2018-08-17 22:13:18 +02:00
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inline unsigned int get_ivs (void) const { return ivs; }
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inline void set_ivs (unsigned int ivs_) { ivs = ivs_; }
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protected:
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unsigned int ivs;
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};
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2018-08-29 21:14:30 +02:00
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template <typename OPSET, typename PARAM>
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struct CFF2CSOpSet : CSOpSet<OPSET, CFF2CSInterpEnv, PARAM>
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2018-08-17 22:13:18 +02:00
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{
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static inline bool process_op (OpCode op, CFF2CSInterpEnv &env, PARAM& param)
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{
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switch (op) {
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case OpCode_blendcs:
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2018-08-30 03:18:18 +02:00
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return OPSET::process_blend (env, param);
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2018-08-17 22:13:18 +02:00
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case OpCode_vsindexcs:
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2018-08-30 03:18:18 +02:00
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return OPSET::process_vsindex (env, param);
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2018-08-17 22:13:18 +02:00
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default:
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2018-08-29 21:14:30 +02:00
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typedef CSOpSet<OPSET, CFF2CSInterpEnv, PARAM> SUPER;
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2018-08-17 22:13:18 +02:00
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if (unlikely (!SUPER::process_op (op, env, param)))
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return false;
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break;
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}
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return true;
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}
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2018-08-30 03:18:18 +02:00
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static inline bool process_blend (CFF2CSInterpEnv &env, PARAM& param)
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{
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// XXX: TODO leave default values?
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OPSET::flush_stack (env, param);
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return true;
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}
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static inline bool process_vsindex (CFF2CSInterpEnv &env, PARAM& param)
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{
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return env.process_vsindex ();
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}
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2018-08-17 22:13:18 +02:00
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};
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template <typename OPSET, typename PARAM>
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struct CFF2CSInterpreter : CSInterpreter<CFF2CSInterpEnv, OPSET, PARAM> {};
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} /* namespace CFF */
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#endif /* HB_CFF2_INTERP_CS_HH */
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