0fd8c2f1be
We need to know whether the glyph exists, so we can fallback to composing / decomposing. Assuming that glyph==0 means "doesn't exist" wouldn't work for applications like Pango that want to use different "doesn't exist" glyph codes for different characters. An explicit return value fixes that.
143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/*
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* Copyright © 2011 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): Behdad Esfahbod
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*/
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#include "hb-test.h"
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/* Unit tests for hb-shape.h */
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static const char test_data[] = "test\0data";
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static void
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glyph_advance_func (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_position_t *x_advance, hb_position_t *y_advance,
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void *user_data)
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{
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switch (glyph) {
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case 1: *x_advance = 10; return;
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case 2: *x_advance = 6; return;
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case 3: *x_advance = 5; return;
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}
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}
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static hb_bool_t
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glyph_func (hb_font_t *font, void *font_data,
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hb_codepoint_t unicode, hb_codepoint_t variant_selector,
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hb_codepoint_t *glyph,
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void *user_data)
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{
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switch (unicode) {
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case 'T': *glyph = 1; return TRUE;
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case 'e': *glyph = 2; return TRUE;
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case 's': *glyph = 3; return TRUE;
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}
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return FALSE;
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}
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static void
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kerning_func (hb_font_t *font, void *font_data,
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hb_codepoint_t left, hb_codepoint_t right,
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hb_position_t *x_kern, hb_position_t *y_kern,
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void *user_data)
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{
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if (left == 1 && right == 2) {
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*x_kern = -2;
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}
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}
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static const char TesT[] = "TesT";
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static void
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test_shape (void)
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{
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hb_blob_t *blob;
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hb_face_t *face;
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hb_font_funcs_t *ffuncs;
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hb_font_t *font;
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hb_buffer_t *buffer;
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unsigned int len;
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hb_glyph_info_t *glyphs;
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hb_glyph_position_t *positions;
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blob = hb_blob_create (test_data, sizeof (test_data), HB_MEMORY_MODE_READONLY, NULL, NULL);
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face = hb_face_create (blob, 0);
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hb_blob_destroy (blob);
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font = hb_font_create (face);
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hb_face_destroy (face);
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hb_font_set_scale (font, 10, 10);
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ffuncs = hb_font_funcs_create ();
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hb_font_funcs_set_glyph_advance_func (ffuncs, glyph_advance_func, NULL, NULL);
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hb_font_funcs_set_glyph_func (ffuncs, glyph_func, NULL, NULL);
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hb_font_funcs_set_kerning_func (ffuncs, kerning_func, NULL, NULL);
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hb_font_set_funcs (font, ffuncs, NULL, NULL);
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hb_font_funcs_destroy (ffuncs);
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buffer = hb_buffer_create (0);
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hb_buffer_set_direction (buffer, HB_DIRECTION_LTR);
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hb_buffer_add_utf8 (buffer, TesT, 4, 0, 4);
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hb_shape (font, buffer, NULL, 0);
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len = hb_buffer_get_length (buffer);
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glyphs = hb_buffer_get_glyph_infos (buffer, NULL);
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positions = hb_buffer_get_glyph_positions (buffer, NULL);
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{
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const hb_codepoint_t output_glyphs[] = {1, 2, 3, 1};
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const hb_position_t output_x_advances[] = {9, 5, 5, 10};
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const hb_position_t output_x_offsets[] = {0, -1, 0, 0};
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unsigned int i;
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g_assert_cmpint (len, ==, 4);
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for (i = 0; i < len; i++) {
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g_assert_cmphex (glyphs[i].codepoint, ==, output_glyphs[i]);
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g_assert_cmphex (glyphs[i].cluster, ==, i);
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}
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for (i = 0; i < len; i++) {
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g_assert_cmpint (output_x_advances[i], ==, positions[i].x_advance);
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g_assert_cmpint (output_x_offsets [i], ==, positions[i].x_offset);
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g_assert_cmpint (0, ==, positions[i].y_advance);
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g_assert_cmpint (0, ==, positions[i].y_offset);
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}
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}
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hb_buffer_destroy (buffer);
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hb_font_destroy (font);
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}
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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_shape);
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return hb_test_run();
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}
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