185 lines
6.6 KiB
C
185 lines
6.6 KiB
C
/*
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* Copyright © 2018 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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#include <stdbool.h>
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#include "hb-test.h"
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#include "hb-subset-test.h"
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/* Unit tests for hb-subset-glyf.h */
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static void check_maxp_field (uint8_t *raw_maxp, unsigned int offset, uint16_t expected_value)
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{
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uint16_t actual_value = (raw_maxp[offset] << 8) + raw_maxp[offset + 1];
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g_assert_cmpuint(expected_value, ==, actual_value);
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}
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static void check_maxp_num_glyphs (hb_face_t *face, uint16_t expected_num_glyphs, bool hints)
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{
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hb_blob_t *maxp_blob = hb_face_reference_table (face, HB_TAG ('m','a','x', 'p'));
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unsigned int maxp_len;
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uint8_t *raw_maxp = (uint8_t *) hb_blob_get_data(maxp_blob, &maxp_len);
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check_maxp_field (raw_maxp, 4, expected_num_glyphs); // numGlyphs
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if (!hints)
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{
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check_maxp_field (raw_maxp, 14, 1); // maxZones
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check_maxp_field (raw_maxp, 16, 0); // maxTwilightPoints
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check_maxp_field (raw_maxp, 18, 0); // maxStorage
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check_maxp_field (raw_maxp, 20, 0); // maxFunctionDefs
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check_maxp_field (raw_maxp, 22, 0); // maxInstructionDefs
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check_maxp_field (raw_maxp, 24, 0); // maxStackElements
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check_maxp_field (raw_maxp, 26, 0); // maxSizeOfInstructions
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}
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hb_blob_destroy (maxp_blob);
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}
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static void
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test_subset_glyf (void)
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{
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hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf");
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hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.ttf");
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hb_set_t *codepoints = hb_set_create();
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hb_set_add (codepoints, 97);
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hb_set_add (codepoints, 99);
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hb_face_t *face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
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hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
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check_maxp_num_glyphs(face_abc_subset, 3, true);
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hb_face_destroy (face_abc_subset);
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hb_face_destroy (face_abc);
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hb_face_destroy (face_ac);
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}
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static void
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test_subset_glyf_with_components (void)
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{
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hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf");
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hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.subset.ttf");
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hb_set_t *codepoints = hb_set_create();
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hb_set_add (codepoints, 0x1fc);
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hb_face_t *face_generated_subset = hb_subset_test_create_subset (face_components, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
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hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
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check_maxp_num_glyphs(face_generated_subset, 4, true);
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hb_face_destroy (face_generated_subset);
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hb_face_destroy (face_subset);
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hb_face_destroy (face_components);
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}
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static void
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test_subset_glyf_noop (void)
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{
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hb_face_t *face_abc = hb_subset_test_open_font("fonts/Roboto-Regular.abc.ttf");
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hb_set_t *codepoints = hb_set_create();
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hb_set_add (codepoints, 97);
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hb_set_add (codepoints, 98);
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hb_set_add (codepoints, 99);
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hb_face_t *face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('g','l','y','f'));
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hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('l','o','c', 'a'));
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check_maxp_num_glyphs(face_abc_subset, 4, true);
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hb_face_destroy (face_abc_subset);
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hb_face_destroy (face_abc);
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}
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static void
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test_subset_glyf_strip_hints_simple (void)
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{
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hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf");
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hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.nohints.ttf");
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hb_set_t *codepoints = hb_set_create();
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hb_set_add (codepoints, 'a');
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hb_set_add (codepoints, 'c');
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hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
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*hb_subset_input_drop_hints(input) = true;
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hb_face_t *face_abc_subset = hb_subset_test_create_subset (face_abc, input);
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a'));
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hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f'));
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check_maxp_num_glyphs(face_abc_subset, 3, false);
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hb_face_destroy (face_abc_subset);
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hb_face_destroy (face_abc);
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hb_face_destroy (face_ac);
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}
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// TODO(rsheeter): test strip hints from composite
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static void
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test_subset_glyf_strip_hints_composite (void)
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{
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hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf");
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hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.subset.ttf");
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hb_set_t *codepoints = hb_set_create();
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hb_set_add (codepoints, 0x1fc);
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hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
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*hb_subset_input_drop_hints(input) = true;
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hb_face_t *face_generated_subset = hb_subset_test_create_subset (face_components, input);
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hb_set_destroy (codepoints);
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hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f'));
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hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a'));
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check_maxp_num_glyphs(face_generated_subset, 4);
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hb_face_destroy (face_generated_subset);
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hb_face_destroy (face_subset);
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hb_face_destroy (face_components);
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}
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// TODO(grieger): test for long loca generation.
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int
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main (int argc, char **argv)
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{
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hb_test_init (&argc, &argv);
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hb_test_add (test_subset_glyf_noop);
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hb_test_add (test_subset_glyf);
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hb_test_add (test_subset_glyf_strip_hints_simple);
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hb_test_add (test_subset_glyf_strip_hints_composite);
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hb_test_add (test_subset_glyf_with_components);
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return hb_test_run();
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}
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