427 lines
12 KiB
C
427 lines
12 KiB
C
/* Pango
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* test-font.c: Test PangoFontDescription
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*
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* Copyright (C) 2024 Red Hat, Inc
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <glib.h>
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#include <string.h>
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#include <locale.h>
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#include <gio/gio.h>
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#include <pango/pangocairo.h>
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#include "test-common.h"
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#undef DEBUG
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static PangoFont *
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load_font_with_font_options (PangoFontMap *fontmap,
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PangoFontDescription *desc,
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cairo_hint_style_t hint_style,
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cairo_hint_metrics_t hint_metrics)
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{
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PangoContext *context;
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cairo_font_options_t *options;
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PangoFont *font;
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context = pango_font_map_create_context (fontmap);
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options = cairo_font_options_create ();
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cairo_font_options_set_hint_style (options, hint_style);
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cairo_font_options_set_hint_metrics (options, hint_metrics);
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pango_cairo_context_set_font_options (context, options);
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cairo_font_options_destroy (options);
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font = pango_context_load_font (context, desc);
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g_object_unref (context);
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return font;
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}
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static PangoFontMap *
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get_font_map_with_boxes (void)
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{
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PangoFontMap *fontmap;
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char *path;
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GError *error = NULL;
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PangoFontDescription *desc;
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PangoFont *font;
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fontmap = pango_cairo_font_map_new ();
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path = g_test_build_filename (G_TEST_DIST, "fonts", "boxes.ttf", NULL);
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pango_font_map_add_font_file (fontmap, path, &error);
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if (error)
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{
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g_clear_error (&error);
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g_clear_object (&fontmap);
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return NULL;
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}
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desc = pango_font_description_from_string ("Boxes 1px");
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font = load_font_with_font_options (fontmap, desc, CAIRO_HINT_STYLE_NONE, CAIRO_HINT_METRICS_OFF);
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if (strcmp (pango_font_family_get_name (pango_font_face_get_family (pango_font_get_face (font))), "Boxes") != 0)
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{
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g_clear_object (&fontmap);
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}
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g_object_unref (font);
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pango_font_description_free (desc);
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g_free (path);
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return fontmap;
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}
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static PangoFontMetrics boxes_unhinted_metrics = {
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.ascent = 204800,
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.descent = 102400,
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.height = 307200,
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.approximate_char_width = 49273,
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.approximate_digit_width = 58368,
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/* Font doesn't have these set, so we get pango defaults */
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.underline_position = -1024,
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.underline_thickness = 1024,
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.strikethrough_position = 102400,
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.strikethrough_thickness = 1024,
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};
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#ifdef DEBUG
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static void
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print_metrics (PangoFont *font)
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{
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PangoFontMetrics *metrics;
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metrics = pango_font_get_metrics (font, pango_language_from_string ("en"));
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g_print ("ascent %d\n", metrics->ascent);
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g_print ("descent %d\n", metrics->descent);
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g_print ("height %d\n", metrics->height);
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g_print ("char width %d\n", metrics->approximate_char_width);
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g_print ("digit width %d\n", metrics->approximate_digit_width);
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g_print ("underline %d %d\n", metrics->underline_position, metrics->underline_thickness);
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g_print ("strikethrough %d %d\n", metrics->strikethrough_position, metrics->strikethrough_thickness);
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pango_font_metrics_unref (metrics);
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}
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#endif
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static void
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test_boxes_font_metrics (void)
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{
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PangoFontMap *fontmap;
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PangoFontDescription *desc;
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PangoFont *font;
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PangoFontMetrics *metrics;
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fontmap = get_font_map_with_boxes ();
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if (!fontmap)
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{
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g_test_fail_printf ("Failed to get a fontmap with Boxes");
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return;
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}
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desc = pango_font_description_from_string ("Boxes 100px");
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font = load_font_with_font_options (fontmap, desc, CAIRO_HINT_STYLE_NONE, CAIRO_HINT_METRICS_OFF);
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#ifdef DEBUG
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print_metrics (font);
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return;
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#endif
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metrics = pango_font_get_metrics (font, pango_language_from_string ("en"));
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g_assert_cmpint (metrics->ascent, ==, boxes_unhinted_metrics.ascent);
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g_assert_cmpint (metrics->descent, ==, boxes_unhinted_metrics.descent);
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g_assert_cmpint (metrics->approximate_char_width, ==, boxes_unhinted_metrics.approximate_char_width);
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g_assert_cmpint (metrics->approximate_digit_width, ==, boxes_unhinted_metrics.approximate_digit_width);
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g_assert_cmpint (metrics->underline_position, ==, boxes_unhinted_metrics.underline_position);
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g_assert_cmpint (metrics->underline_thickness, ==, boxes_unhinted_metrics.underline_thickness);
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g_assert_cmpint (metrics->strikethrough_position, ==, boxes_unhinted_metrics.strikethrough_position);
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g_assert_cmpint (metrics->strikethrough_thickness, ==, boxes_unhinted_metrics.strikethrough_thickness);
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pango_font_metrics_unref (metrics);
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g_object_unref (font);
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pango_font_description_free (desc);
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g_object_unref (fontmap);
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}
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typedef struct
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{
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const char *name;
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PangoGlyph id;
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PangoRectangle ink;
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PangoRectangle logical;
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} GlyphMetrics;
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static GlyphMetrics boxes_unhinted_glyphs[] = {
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{ .name = "A",
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.id = 1,
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.ink = { 0, -100, 100, 100 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "B",
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.id = 2,
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.ink = { 0, -200, 200, 200 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "C",
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.id = 3,
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.ink = { 0, -400, 400, 400 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "D",
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.id = 4,
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.ink = { 0, -800, 800, 800 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "E",
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.id = 5,
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.ink = { 0, -1600, 1600, 1600 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "F",
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.id = 6,
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.ink = { 0, -3200, 3200, 3200 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "G",
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.id = 7,
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.ink = { 0, -6400, 6400, 6400 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "H",
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.id = 8,
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.ink = { 0, -12800, 12800, 12800 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "I",
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.id = 9,
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.ink = { 0, -25600, 25600, 25600 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "J",
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.id = 10,
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.ink = { 0, -51200, 51200, 51200 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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{ .name = "K",
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.id = 11,
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.ink = { 0, -102400, 102400, 102400 },
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.logical = { 0, -204800, 102400, 307200 }
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},
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};
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#ifdef DEBUG
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static void
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print_glyph_metrics (PangoFont *font,
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gunichar ch)
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{
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hb_font_t *hb_font;
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hb_codepoint_t glyph;
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char name[6];
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g_unichar_to_utf8 (ch, name);
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hb_font = pango_font_get_hb_font (font);
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if (!hb_font_get_glyph (hb_font, ch, 0, &glyph))
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{
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g_print ("Not a glyph: %s\n", name);
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}
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else
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{
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PangoRectangle ink, logical;
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pango_font_get_glyph_extents (font, glyph, &ink, &logical);
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g_print ("{ .name = \"%s\",\n", name);
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g_print (" .id = %u,\n", glyph);
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g_print (" .ink = { %d, %d, %d, %d },\n", ink.x, ink.y, ink.width, ink.height);
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g_print (" .logical = { %d, %d, %d, %d }\n", logical.x, logical.y, logical.width, logical.height);
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g_print ("},\n");
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}
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}
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#endif
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static gboolean
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pango_rectangle_equal (const PangoRectangle *a,
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const PangoRectangle *b)
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{
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return a->x == b->x &&
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a->y == b->y &&
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a->width == b->width &&
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a->height == b->height;
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}
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#define assert_rectangle_equal(s, a, b) \
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G_STMT_START { \
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const PangoRectangle *ar = (a); \
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const PangoRectangle *br = (b); \
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if (!pango_rectangle_equal (ar, br)) \
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{ \
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char msg[1024]; \
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g_snprintf (msg, sizeof (msg), "assertion failed for %s ( { %d %d %d %d } == { %d %d %d %d } )", \
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s, \
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ar->x, ar->y, ar->width, ar->height, \
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br->x, br->y, br->width, br->height); \
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g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, msg); \
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} \
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} G_STMT_END
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static void
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test_boxes_glyph_metrics (void)
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{
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PangoFontDescription *desc;
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PangoFontMap *fontmap;
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PangoFont *font;
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fontmap = get_font_map_with_boxes ();
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if (!fontmap)
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{
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g_test_fail_printf ("Failed to get a fontmap with Boxes");
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return;
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}
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desc = pango_font_description_from_string ("Boxes 100px");
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font = load_font_with_font_options (fontmap, desc, CAIRO_HINT_STYLE_NONE, CAIRO_HINT_METRICS_OFF);
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#ifdef DEBUG
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print_glyph_metrics (font, 'A');
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print_glyph_metrics (font, 'B');
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print_glyph_metrics (font, 'C');
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print_glyph_metrics (font, 'D');
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print_glyph_metrics (font, 'E');
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print_glyph_metrics (font, 'F');
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print_glyph_metrics (font, 'G');
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print_glyph_metrics (font, 'H');
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print_glyph_metrics (font, 'I');
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print_glyph_metrics (font, 'J');
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print_glyph_metrics (font, 'K');
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return;
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#endif
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for (int i = 0; i < G_N_ELEMENTS (boxes_unhinted_glyphs); i++)
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{
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GlyphMetrics *gm = &boxes_unhinted_glyphs[i];
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PangoRectangle ink, logical;
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char str[64];
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pango_font_get_glyph_extents (font, gm->id, &ink, &logical);
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g_snprintf (str, sizeof (str), "%s (ink)", gm->name);
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assert_rectangle_equal (str, &ink, &gm->ink);
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g_snprintf (str, sizeof (str), "%s (logical)", gm->name);
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assert_rectangle_equal (str, &logical, &gm->logical);
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}
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g_object_unref (font);
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pango_font_description_free (desc);
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g_object_unref (fontmap);
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}
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static GlyphMetrics boxes_unhinted_glyphs2[] = {
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{ .name = "L",
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.id = 12,
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.ink = { 0, -5120, 5120, 5120 },
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.logical = { 0, -20480, 10240, 30720 }
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},
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{ .name = "M",
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.id = 13,
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.ink = { 5120, -5120, 5120, 5120 },
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.logical = { 0, -20480, 10240, 30720 }
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},
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{ .name = "N",
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.id = 14,
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.ink = { 5120, -10240, 5120, 5120 },
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.logical = { 0, -20480, 10240, 30720 }
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},
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{ .name = "O",
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.id = 15,
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.ink = { 0, -10240, 5120, 5120 },
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.logical = { 0, -20480, 10240, 30720 }
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},
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{ .name = "P",
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.id = 16,
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.ink = { 2560, -7680, 5120, 5120 },
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.logical = { 0, -20480, 10240, 30720 }
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},
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};
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static void
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test_boxes_glyph_metrics2 (void)
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{
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PangoFontDescription *desc;
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PangoFontMap *fontmap;
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PangoFont *font;
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fontmap = get_font_map_with_boxes ();
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if (!fontmap)
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{
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g_test_fail_printf ("Failed to get a fontmap with Boxes");
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return;
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}
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desc = pango_font_description_from_string ("Boxes 10px");
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font = load_font_with_font_options (fontmap, desc, CAIRO_HINT_STYLE_NONE, CAIRO_HINT_METRICS_OFF);
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#ifdef DEBUG
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print_glyph_metrics (font, 'L');
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print_glyph_metrics (font, 'M');
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print_glyph_metrics (font, 'N');
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print_glyph_metrics (font, 'O');
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print_glyph_metrics (font, 'P');
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return;
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#endif
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for (int i = 0; i < G_N_ELEMENTS (boxes_unhinted_glyphs2); i++)
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{
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GlyphMetrics *gm = &boxes_unhinted_glyphs2[i];
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PangoRectangle ink, logical;
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char str[64];
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pango_font_get_glyph_extents (font, gm->id, &ink, &logical);
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g_snprintf (str, sizeof (str), "%s (ink)", gm->name);
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assert_rectangle_equal (str, &ink, &gm->ink);
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g_snprintf (str, sizeof (str), "%s (ink)", gm->name);
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assert_rectangle_equal (str, &logical, &gm->logical);
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}
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g_object_unref (font);
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pango_font_description_free (desc);
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g_object_unref (fontmap);
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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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setlocale (LC_ALL, "");
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g_test_init (&argc, &argv, NULL);
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g_test_set_nonfatal_assertions ();
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g_test_add_func ("/pango/font/boxes/font-metrics", test_boxes_font_metrics);
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g_test_add_func ("/pango/font/boxes/glyph-metrics", test_boxes_glyph_metrics);
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g_test_add_func ("/pango/font/boxes/glyph-metrics2", test_boxes_glyph_metrics2);
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return g_test_run ();
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}
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