mirror of
https://github.com/harfbuzz/harfbuzz.git
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116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
/*
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* Copyright © 2023 Google, Inc.
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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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* Google Author(s): Garret Rieger
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*/
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#ifndef HELPER_SUBSET_HH
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#define HELPER_SUBSET_HH
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#include "glib.h"
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#include <errno.h>
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#include <math.h>
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#include <stdbool.h>
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#include "hb-subset.h"
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#ifndef HB_NO_VAR
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static gboolean
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parse_instancing_spec (const char *arg,
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hb_face_t* face,
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hb_subset_input_t* input,
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GError **error)
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{
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char* s;
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while ((s = strtok((char *) arg, "=")))
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{
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arg = NULL;
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unsigned len = strlen (s);
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if (len > 4) //Axis tags are 4 bytes.
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing axis tag at: '%s'", s);
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return false;
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}
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/* support *=drop */
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if (0 == strcmp (s, "*"))
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{
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s = strtok(NULL, ", ");
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if (0 != strcmp (s, "drop"))
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed parsing axis position at: '%s'", s);
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return false;
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}
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if (!hb_subset_input_pin_all_axes_to_default (input, face))
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Failed pinning all axes to default.");
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return false;
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}
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continue;
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}
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hb_tag_t axis_tag = hb_tag_from_string (s, len);
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s = strtok(NULL, ", ");
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if (!s)
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Value not specified for axis: %c%c%c%c", HB_UNTAG (axis_tag));
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return false;
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}
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if (strcmp (s, "drop") == 0) {
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if (!hb_subset_input_pin_axis_to_default (input,
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face,
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axis_tag))
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Cannot pin axis: '%c%c%c%c', not present in fvar", HB_UNTAG (axis_tag));
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return false;
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}
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continue;
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}
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float min, def, max;
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if (!hb_subset_axis_range_from_string(s, -1, &min, &max, &def))
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return false;
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if (!hb_subset_input_set_axis_range (input,
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face, axis_tag,
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min, max, def))
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{
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g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Cannot pin axis: '%c%c%c%c', not present in fvar", HB_UNTAG (axis_tag));
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return false;
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}
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continue;
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}
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return true;
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}
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#endif
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#endif
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