Add src/test-would-substitute tool

src/Makefile.am

@@ -177,7 +177,7 @@ hb-ot-shape-complex-indic-machine.hh: hb-ot-shape-complex-indic-machine.rl
 	$(AM_V_GEN)$(top_srcdir)/missing --run ragel -e -F1 -o "$@.tmp" "$<" && \
 	mv "$@.tmp" "$@" || ( $(RM) "$@.tmp" && false )
 
-noinst_PROGRAMS = main indic
+noinst_PROGRAMS = main indic test-would-substitute
 bin_PROGRAMS =
 
 main_SOURCES = main.cc
@@ -188,6 +188,10 @@ indic_SOURCES = indic.cc
 indic_CPPFLAGS = $(HBCFLAGS)
 indic_LDADD = libharfbuzz.la $(HBLIBS)
 
+test_would_substitute_SOURCES = test-would-substitute.cc
+test_would_substitute_CPPFLAGS = $(HBCFLAGS) $(FREETYPE_CFLAGS)
+test_would_substitute_LDADD = libharfbuzz.la $(HBLIBS) $(FREETYPE_LIBS)
+
 dist_check_SCRIPTS = \
 	check-c-linkage-decls.sh \
 	check-header-guards.sh \

src/test-would-substitute.cc

+/*
+ * Copyright © 2010,2011  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): Behdad Esfahbod
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "hb.h"
+#include "hb-ot.h"
+
+#ifdef HAVE_GLIB
+#include <glib.h>
+#endif
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef HAVE_FREETYPE
+#include "hb-ft.h"
+#endif
+
+int
+main (int argc, char **argv)
+{
+  hb_blob_t *blob = NULL;
+
+  if (argc != 4 && argc != 5) {
+    fprintf (stderr, "usage: %s lookup-index first-glyph [second-glyph]\n", argv[0]);
+    exit (1);
+  }
+
+  /* Create the blob */
+  {
+    const char *font_data;
+    unsigned int len;
+    hb_destroy_func_t destroy;
+    void *user_data;
+    hb_memory_mode_t mm;
+
+#ifdef HAVE_GLIB
+    GMappedFile *mf = g_mapped_file_new (argv[1], FALSE, NULL);
+    font_data = g_mapped_file_get_contents (mf);
+    len = g_mapped_file_get_length (mf);
+    destroy = (hb_destroy_func_t) g_mapped_file_unref;
+    user_data = (void *) mf;
+    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
+#else
+    FILE *f = fopen (argv[1], "rb");
+    fseek (f, 0, SEEK_END);
+    len = ftell (f);
+    fseek (f, 0, SEEK_SET);
+    font_data = (const char *) malloc (len);
+    if (!font_data) len = 0;
+    len = fread ((char *) font_data, 1, len, f);
+    destroy = free;
+    user_data = (void *) font_data;
+    fclose (f);
+    mm = HB_MEMORY_MODE_WRITABLE;
+#endif
+
+    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
+  }
+
+  /* Create the face */
+  hb_face_t *face = hb_face_create (blob, 0 /* first face */);
+  hb_blob_destroy (blob);
+  blob = NULL;
+
+  unsigned int len = argc - 3;
+  hb_codepoint_t glyphs[2] = {strtol (argv[3], NULL, 0), argc > 4 ? strtol (argv[4], NULL, 0) : (hb_codepoint_t) -1};
+  return !hb_ot_layout_would_substitute_lookup (face, glyphs, len, strtol (argv[2], NULL, 0));
+}

src/test.cc

+/*
+ * Copyright © 2010,2011  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): Behdad Esfahbod
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "hb.h"
+
+#ifdef HAVE_GLIB
+#include <glib.h>
+#endif
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef HAVE_FREETYPE
+#include "hb-ft.h"
+#endif
+
+int
+main (int argc, char **argv)
+{
+  hb_blob_t *blob = NULL;
+
+  if (argc != 2) {
+    fprintf (stderr, "usage: %s font-file.ttf\n", argv[0]);
+    exit (1);
+  }
+
+  /* Create the blob */
+  {
+    const char *font_data;
+    unsigned int len;
+    hb_destroy_func_t destroy;
+    void *user_data;
+    hb_memory_mode_t mm;
+
+#ifdef HAVE_GLIB
+    GMappedFile *mf = g_mapped_file_new (argv[1], FALSE, NULL);
+    font_data = g_mapped_file_get_contents (mf);
+    len = g_mapped_file_get_length (mf);
+    destroy = (hb_destroy_func_t) g_mapped_file_unref;
+    user_data = (void *) mf;
+    mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
+#else
+    FILE *f = fopen (argv[1], "rb");
+    fseek (f, 0, SEEK_END);
+    len = ftell (f);
+    fseek (f, 0, SEEK_SET);
+    font_data = (const char *) malloc (len);
+    if (!font_data) len = 0;
+    len = fread ((char *) font_data, 1, len, f);
+    destroy = free;
+    user_data = (void *) font_data;
+    fclose (f);
+    mm = HB_MEMORY_MODE_WRITABLE;
+#endif
+
+    blob = hb_blob_create (font_data, len, mm, user_data, destroy);
+  }
+
+  printf ("Opened font file %s: %u bytes long\n", argv[1], hb_blob_get_length (blob));
+
+  /* Create the face */
+  hb_face_t *face = hb_face_create (blob, 0 /* first face */);
+  hb_blob_destroy (blob);
+  blob = NULL;
+  unsigned int upem = hb_face_get_upem (face);
+
+  hb_font_t *font = hb_font_create (face);
+  hb_font_set_scale (font, upem, upem);
+
+#ifdef HAVE_FREETYPE
+  hb_ft_font_set_funcs (font);
+#endif
+
+  hb_buffer_t *buffer = hb_buffer_create ();
+
+  hb_buffer_add_utf8 (buffer, "\xe0\xa4\x95\xe0\xa5\x8d\xe0\xa4\xb0\xe0\xa5\x8d\xe0\xa4\x95", -1, 0, -1);
+
+  hb_shape (font, buffer, NULL, 0);
+
+  unsigned int count = hb_buffer_get_length (buffer);
+  hb_glyph_info_t *infos = hb_buffer_get_glyph_infos (buffer, NULL);
+  hb_glyph_position_t *positions = hb_buffer_get_glyph_positions (buffer, NULL);
+
+  for (unsigned int i = 0; i < count; i++)
+  {
+    hb_glyph_info_t *info = &infos[i];
+    hb_glyph_position_t *pos = &positions[i];
+
+    printf ("cluster %d	glyph 0x%x at	(%d,%d)+(%d,%d)\n",
+	    info->cluster,
+	    info->codepoint,
+	    pos->x_offset,
+	    pos->x_offset,
+	    pos->x_advance,
+	    pos->y_advance);
+
+  }
+
+  hb_buffer_destroy (buffer);
+  hb_font_destroy (font);
+  hb_face_destroy (face);
+
+  return 0;
+}
+
+