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Diffstat (limited to 'test/api/test-subset-glyf.c')
| -rw-r--r-- | test/api/test-subset-glyf.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/test/api/test-subset-glyf.c b/test/api/test-subset-glyf.c new file mode 100644 index 0000000..8e17e8d --- /dev/null +++ b/test/api/test-subset-glyf.c @@ -0,0 +1,183 @@ +/* + * Copyright © 2018 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 + */ + +#include <stdbool.h> + +#include "hb-test.h" +#include "hb-subset-test.h" + +/* Unit tests for hb-subset-glyf.h */ + +static void check_maxp_field (uint8_t *raw_maxp, unsigned int offset, uint16_t expected_value) +{ + uint16_t actual_value = (raw_maxp[offset] << 8) + raw_maxp[offset + 1]; + g_assert_cmpuint(expected_value, ==, actual_value); +} + +static void check_maxp_num_glyphs (hb_face_t *face, uint16_t expected_num_glyphs, bool hints) +{ + hb_blob_t *maxp_blob = hb_face_reference_table (face, HB_TAG ('m','a','x', 'p')); + + unsigned int maxp_len; + uint8_t *raw_maxp = (uint8_t *) hb_blob_get_data(maxp_blob, &maxp_len); + + check_maxp_field (raw_maxp, 4, expected_num_glyphs); // numGlyphs + if (!hints) + { + check_maxp_field (raw_maxp, 14, 1); // maxZones + check_maxp_field (raw_maxp, 16, 0); // maxTwilightPoints + check_maxp_field (raw_maxp, 18, 0); // maxStorage + check_maxp_field (raw_maxp, 20, 0); // maxFunctionDefs + check_maxp_field (raw_maxp, 22, 0); // maxInstructionDefs + check_maxp_field (raw_maxp, 24, 0); // maxStackElements + check_maxp_field (raw_maxp, 26, 0); // maxSizeOfInstructions + } + + hb_blob_destroy (maxp_blob); +} + +static void +test_subset_glyf (void) +{ + hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf"); + hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.ttf"); + + hb_set_t *codepoints = hb_set_create(); + hb_set_add (codepoints, 97); + hb_set_add (codepoints, 99); + hb_face_t *face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); + hb_set_destroy (codepoints); + + hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f')); + hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a')); + check_maxp_num_glyphs(face_abc_subset, 3, true); + + hb_face_destroy (face_abc_subset); + hb_face_destroy (face_abc); + hb_face_destroy (face_ac); +} + +static void +test_subset_glyf_with_components (void) +{ + hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf"); + hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.subset.ttf"); + + hb_set_t *codepoints = hb_set_create(); + hb_set_add (codepoints, 0x1fc); + hb_face_t *face_generated_subset = hb_subset_test_create_subset (face_components, hb_subset_test_create_input (codepoints)); + hb_set_destroy (codepoints); + + hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f')); + hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a')); + check_maxp_num_glyphs(face_generated_subset, 4, true); + + hb_face_destroy (face_generated_subset); + hb_face_destroy (face_subset); + hb_face_destroy (face_components); +} + +static void +test_subset_glyf_noop (void) +{ + hb_face_t *face_abc = hb_subset_test_open_font("fonts/Roboto-Regular.abc.ttf"); + + hb_set_t *codepoints = hb_set_create(); + hb_set_add (codepoints, 97); + hb_set_add (codepoints, 98); + hb_set_add (codepoints, 99); + hb_face_t *face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints)); + hb_set_destroy (codepoints); + + hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('g','l','y','f')); + hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('l','o','c', 'a')); + check_maxp_num_glyphs(face_abc_subset, 4, true); + + hb_face_destroy (face_abc_subset); + hb_face_destroy (face_abc); +} + +static void +test_subset_glyf_strip_hints_simple (void) +{ + hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf"); + hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.nohints.ttf"); + + hb_set_t *codepoints = hb_set_create(); + hb_set_add (codepoints, 'a'); + hb_set_add (codepoints, 'c'); + hb_subset_input_t *input = hb_subset_test_create_input (codepoints); + *hb_subset_input_drop_hints(input) = true; + hb_face_t *face_abc_subset = hb_subset_test_create_subset (face_abc, input); + hb_set_destroy (codepoints); + + hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('l','o','c', 'a')); + hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','l','y','f')); + check_maxp_num_glyphs(face_abc_subset, 3, false); + + hb_face_destroy (face_abc_subset); + hb_face_destroy (face_abc); + hb_face_destroy (face_ac); +} + +static void +test_subset_glyf_strip_hints_composite (void) +{ + hb_face_t *face_components = hb_subset_test_open_font ("fonts/Roboto-Regular.components.ttf"); + hb_face_t *face_subset = hb_subset_test_open_font ("fonts/Roboto-Regular.components.1fc.nohints.ttf"); + + hb_set_t *codepoints = hb_set_create(); + hb_set_add (codepoints, 0x1fc); + hb_subset_input_t *input = hb_subset_test_create_input (codepoints); + *hb_subset_input_drop_hints(input) = true; + + hb_face_t *face_generated_subset = hb_subset_test_create_subset (face_components, input); + hb_set_destroy (codepoints); + + hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('g','l','y','f')); + hb_subset_test_check (face_subset, face_generated_subset, HB_TAG ('l','o','c', 'a')); + check_maxp_num_glyphs(face_generated_subset, 4, false); + + hb_face_destroy (face_generated_subset); + hb_face_destroy (face_subset); + hb_face_destroy (face_components); +} + +// TODO(grieger): test for long loca generation. + +int +main (int argc, char **argv) +{ + hb_test_init (&argc, &argv); + + hb_test_add (test_subset_glyf_noop); + hb_test_add (test_subset_glyf); + hb_test_add (test_subset_glyf_strip_hints_simple); + hb_test_add (test_subset_glyf_strip_hints_composite); + hb_test_add (test_subset_glyf_with_components); + + return hb_test_run(); +} |