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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
commit | 2aa4a82499d4becd2284cdb482213d541b8804dd (patch) | |
tree | b80bf8bf13c3766139fbacc530efd0dd9d54394c /gfx/harfbuzz/src/hb-cff2-interp-cs.hh | |
parent | Initial commit. (diff) | |
download | firefox-2aa4a82499d4becd2284cdb482213d541b8804dd.tar.xz firefox-2aa4a82499d4becd2284cdb482213d541b8804dd.zip |
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | gfx/harfbuzz/src/hb-cff2-interp-cs.hh | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-cff2-interp-cs.hh b/gfx/harfbuzz/src/hb-cff2-interp-cs.hh new file mode 100644 index 0000000000..332ece31cd --- /dev/null +++ b/gfx/harfbuzz/src/hb-cff2-interp-cs.hh @@ -0,0 +1,272 @@ +/* + * Copyright © 2018 Adobe Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Adobe Author(s): Michiharu Ariza + */ +#ifndef HB_CFF2_INTERP_CS_HH +#define HB_CFF2_INTERP_CS_HH + +#include "hb.hh" +#include "hb-cff-interp-cs-common.hh" + +namespace CFF { + +using namespace OT; + +struct blend_arg_t : number_t +{ + void init () + { + number_t::init (); + deltas.init (); + } + + void fini () + { + number_t::fini (); + deltas.fini_deep (); + } + + void set_int (int v) { reset_blends (); number_t::set_int (v); } + void set_fixed (int32_t v) { reset_blends (); number_t::set_fixed (v); } + void set_real (double v) { reset_blends (); number_t::set_real (v); } + + void set_blends (unsigned int numValues_, unsigned int valueIndex_, + unsigned int numBlends, hb_array_t<const blend_arg_t> blends_) + { + numValues = numValues_; + valueIndex = valueIndex_; + deltas.resize (numBlends); + for (unsigned int i = 0; i < numBlends; i++) + deltas[i] = blends_[i]; + } + + bool blending () const { return deltas.length > 0; } + void reset_blends () + { + numValues = valueIndex = 0; + deltas.resize (0); + } + + unsigned int numValues; + unsigned int valueIndex; + hb_vector_t<number_t> deltas; +}; + +typedef interp_env_t<blend_arg_t> BlendInterpEnv; +typedef biased_subrs_t<CFF2Subrs> cff2_biased_subrs_t; + +struct cff2_cs_interp_env_t : cs_interp_env_t<blend_arg_t, CFF2Subrs> +{ + template <typename ACC> + void init (const byte_str_t &str, ACC &acc, unsigned int fd, + const int *coords_=nullptr, unsigned int num_coords_=0) + { + SUPER::init (str, acc.globalSubrs, acc.privateDicts[fd].localSubrs); + + coords = coords_; + num_coords = num_coords_; + varStore = acc.varStore; + seen_blend = false; + seen_vsindex_ = false; + scalars.init (); + do_blend = num_coords && coords && varStore->size; + set_ivs (acc.privateDicts[fd].ivs); + } + + void fini () + { + scalars.fini (); + SUPER::fini (); + } + + op_code_t fetch_op () + { + if (this->str_ref.avail ()) + return SUPER::fetch_op (); + + /* make up return or endchar op */ + if (this->callStack.is_empty ()) + return OpCode_endchar; + else + return OpCode_return; + } + + const blend_arg_t& eval_arg (unsigned int i) + { + blend_arg_t &arg = argStack[i]; + blend_arg (arg); + return arg; + } + + const blend_arg_t& pop_arg () + { + blend_arg_t &arg = argStack.pop (); + blend_arg (arg); + return arg; + } + + void process_blend () + { + if (!seen_blend) + { + region_count = varStore->varStore.get_region_index_count (get_ivs ()); + if (do_blend) + { + if (unlikely (!scalars.resize (region_count))) + set_error (); + else + varStore->varStore.get_scalars (get_ivs (), coords, num_coords, + &scalars[0], region_count); + } + seen_blend = true; + } + } + + void process_vsindex () + { + unsigned int index = argStack.pop_uint (); + if (unlikely (seen_vsindex () || seen_blend)) + { + set_error (); + } + else + { + set_ivs (index); + } + seen_vsindex_ = true; + } + + unsigned int get_region_count () const { return region_count; } + void set_region_count (unsigned int region_count_) { region_count = region_count_; } + unsigned int get_ivs () const { return ivs; } + void set_ivs (unsigned int ivs_) { ivs = ivs_; } + bool seen_vsindex () const { return seen_vsindex_; } + + protected: + void blend_arg (blend_arg_t &arg) + { + if (do_blend && arg.blending ()) + { + if (likely (scalars.length == arg.deltas.length)) + { + double v = arg.to_real (); + for (unsigned int i = 0; i < scalars.length; i++) + { + v += (double)scalars[i] * arg.deltas[i].to_real (); + } + arg.set_real (v); + arg.deltas.resize (0); + } + } + } + + protected: + const int *coords; + unsigned int num_coords; + const CFF2VariationStore *varStore; + unsigned int region_count; + unsigned int ivs; + hb_vector_t<float> scalars; + bool do_blend; + bool seen_vsindex_; + bool seen_blend; + + typedef cs_interp_env_t<blend_arg_t, CFF2Subrs> SUPER; +}; +template <typename OPSET, typename PARAM, typename PATH=path_procs_null_t<cff2_cs_interp_env_t, PARAM>> +struct cff2_cs_opset_t : cs_opset_t<blend_arg_t, OPSET, cff2_cs_interp_env_t, PARAM, PATH> +{ + static void process_op (op_code_t op, cff2_cs_interp_env_t &env, PARAM& param) + { + switch (op) { + case OpCode_callsubr: + case OpCode_callgsubr: + /* a subroutine number shoudln't be a blended value */ + if (unlikely (env.argStack.peek ().blending ())) + { + env.set_error (); + break; + } + SUPER::process_op (op, env, param); + break; + + case OpCode_blendcs: + OPSET::process_blend (env, param); + break; + + case OpCode_vsindexcs: + if (unlikely (env.argStack.peek ().blending ())) + { + env.set_error (); + break; + } + OPSET::process_vsindex (env, param); + break; + + default: + SUPER::process_op (op, env, param); + } + } + + static void process_blend (cff2_cs_interp_env_t &env, PARAM& param) + { + unsigned int n, k; + + env.process_blend (); + k = env.get_region_count (); + n = env.argStack.pop_uint (); + /* copy the blend values into blend array of the default values */ + unsigned int start = env.argStack.get_count () - ((k+1) * n); + /* let an obvious error case fail, but note CFF2 spec doesn't forbid n==0 */ + if (unlikely (start > env.argStack.get_count ())) + { + env.set_error (); + return; + } + for (unsigned int i = 0; i < n; i++) + { + const hb_array_t<const blend_arg_t> blends = env.argStack.get_subarray (start + n + (i * k)); + env.argStack[start + i].set_blends (n, i, k, blends); + } + + /* pop off blend values leaving default values now adorned with blend values */ + env.argStack.pop (k * n); + } + + static void process_vsindex (cff2_cs_interp_env_t &env, PARAM& param) + { + env.process_vsindex (); + env.clear_args (); + } + + private: + typedef cs_opset_t<blend_arg_t, OPSET, cff2_cs_interp_env_t, PARAM, PATH> SUPER; +}; + +template <typename OPSET, typename PARAM> +struct cff2_cs_interpreter_t : cs_interpreter_t<cff2_cs_interp_env_t, OPSET, PARAM> {}; + +} /* namespace CFF */ + +#endif /* HB_CFF2_INTERP_CS_HH */ |