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