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Add tests for color conversion and interpolation
Add some tests for gtk_css_color_convert and gtk_css_color_interpolate, mostly based on examples in the spec.
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Matthias Clasen
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740c10282f
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60c944bb94
222
testsuite/css/color.c
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222
testsuite/css/color.c
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/*
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* Copyright (C) 2024 Red Hat Inc.
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*
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* Author:
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* Matthias Clasen <mclasen@redhat.com>
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "gtk/gtkcssvalueprivate.h"
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#include "gtk/gtkcsscolorprivate.h"
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#include "gtk/gtkcsscolorvalueprivate.h"
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#include "gtk/gtkcssstylepropertyprivate.h"
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#include "gtk/gtkcssstaticstyleprivate.h"
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#define EPSILON 0.001
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static gboolean
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color_is_near (const GtkCssColor *color1,
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const GtkCssColor *color2)
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{
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return color1->color_space == color2->color_space &&
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color1->missing == color2->missing &&
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fabs (color1->values[0] - color2->values[0]) <= EPSILON &&
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fabs (color1->values[1] - color2->values[1]) <= EPSILON &&
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fabs (color1->values[2] - color2->values[2]) <= EPSILON &&
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fabs (color1->values[3] - color2->values[3]) <= EPSILON;
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}
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static void
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error_cb (GtkCssParser *parser,
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const GtkCssLocation *start,
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const GtkCssLocation *end,
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const GError *error,
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gpointer user_data)
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{
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*(GError **)user_data = g_error_copy (error);
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}
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static void
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color_from_string (const char *str,
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GtkCssColor *res)
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{
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GtkStyleProperty *prop;
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GBytes *bytes;
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GtkCssParser *parser;
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GtkCssValue *value;
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GError *error = NULL;
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bytes = g_bytes_new_static (str, strlen (str));
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parser = gtk_css_parser_new_for_bytes (bytes, NULL, error_cb, &error, NULL);
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prop = _gtk_style_property_lookup ("color");
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value = _gtk_style_property_parse_value (prop, parser);
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g_assert_nonnull (value);
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g_assert_no_error (error);
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gtk_css_parser_unref (parser);
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g_bytes_unref (bytes);
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gtk_css_color_init_from_color (res, gtk_css_color_value_get_color (value));
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gtk_css_value_unref (value);
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}
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static void
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print_css_color (const char *prefix,
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const GtkCssColor *c)
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{
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GtkCssValue *v;
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char *s;
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v = gtk_css_color_value_new_color (c->color_space,
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FALSE,
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c->values,
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(gboolean[4]) {
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gtk_css_color_component_missing (c, 0),
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gtk_css_color_component_missing (c, 1),
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gtk_css_color_component_missing (c, 2),
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gtk_css_color_component_missing (c, 3),
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});
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s = gtk_css_value_to_string (v);
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g_print ("%s: %s\n", prefix, s);
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g_free (s);
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gtk_css_value_unref (v);
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}
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/* Tests for css color conversions */
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typedef struct {
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const char *input;
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GtkCssColorSpace dest;
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const char *expected;
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} ColorConversionTest;
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static ColorConversionTest conversion_tests[] = {
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{ "rgb(255,0,0)", GTK_CSS_COLOR_SPACE_SRGB_LINEAR, "color(srgb-linear 1 0 0)" },
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{ "color(srgb 0.5 none 1 / 0.7)", GTK_CSS_COLOR_SPACE_SRGB_LINEAR, "color(srgb-linear 0.214041 0 1 / 0.7)" },
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{ "rgb(100,100,100)", GTK_CSS_COLOR_SPACE_HSL, "hsla(0deg 0 39.215687 / 1)" },
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/* the following are from color-4, Example 26 */
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{ "oklch(40.101% 0.12332 21.555)", GTK_CSS_COLOR_SPACE_SRGB, "rgb(49.06% 13.87% 15.9%)" },
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{ "oklch(59.686% 0.15619 49.7694)", GTK_CSS_COLOR_SPACE_SRGB, "rgb(77.61% 36.34% 2.45%)" },
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{ "oklch(0.65125 0.13138 104.097)", GTK_CSS_COLOR_SPACE_SRGB, "rgb(61.65% 57.51% 9.28%)" },
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{ "oklch(0.66016 0.15546 134.231)", GTK_CSS_COLOR_SPACE_SRGB, "rgb(40.73% 65.12% 22.35%)" },
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{ "oklch(72.322% 0.12403 247.996)", GTK_CSS_COLOR_SPACE_SRGB, "rgb(38.29% 67.27% 93.85%)" },
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{ "oklch(42.1% 48.25% 328.4)", GTK_CSS_COLOR_SPACE_SRGB, "color(srgb 0.501808 0.00257216 0.501403)" },
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/* more random tests */
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{ "oklch(0.392 0.4 none)", GTK_CSS_COLOR_SPACE_OKLCH, "oklch(0.392 0.4 0)" },
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};
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static void
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test_conversion (gconstpointer data)
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{
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ColorConversionTest *test = &conversion_tests[GPOINTER_TO_INT (data)];
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GtkCssColor input;
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GtkCssColor expected;
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GtkCssColor result;
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color_from_string (test->input, &input);
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color_from_string (test->expected, &expected);
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gtk_css_color_convert (&input, test->dest, &result);
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if (g_test_verbose ())
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{
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print_css_color ("expected", &expected);
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print_css_color ("converted", &result);
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}
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g_assert_true (color_is_near (&result, &expected));
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}
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/* Tests for css color interpolation */
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typedef struct {
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const char *input1;
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const char *input2;
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float progress;
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GtkCssColorSpace in;
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GtkCssHueInterpolation interp;
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const char *expected;
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} ColorInterpolationTest;
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static ColorInterpolationTest interpolation_tests[] = {
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/* color-4, example 33 */
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{ "oklch(78.3% 0.108 326.5)", "oklch(39.2% 0.4 none)", 0.5, GTK_CSS_COLOR_SPACE_OKLCH, GTK_CSS_HUE_INTERPOLATION_SHORTER, "oklch(58.75% 0.254 326.5)" },
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/* color-4, example 34 */
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{ "oklch(0.783 0.108 326.5 / 0.5)", "oklch(0.392 0.4 0 / none)", 0.5, GTK_CSS_COLOR_SPACE_OKLCH, GTK_CSS_HUE_INTERPOLATION_SHORTER, "oklch(0.5875 0.254 343.25 / 0.5)" },
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/* color-4, example 35 */
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{ "rgb(24% 12% 98% / 0.4)", "rgb(62% 26% 64% / 0.6)", 0.5, GTK_CSS_COLOR_SPACE_SRGB, GTK_CSS_HUE_INTERPOLATION_SHORTER, "rgb(46.8% 20.4% 77.6% / 0.5)" },
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/* color-4, example 38 */
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{ "oklch(0.6 0.24 30)", "oklch(0.8 0.15 90)", 0.5, GTK_CSS_COLOR_SPACE_OKLCH, GTK_CSS_HUE_INTERPOLATION_SHORTER, "oklch(0.7 0.195 60)" },
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/* color-4, example 39 */
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{ "oklch(0.6 0.24 30)", "oklch(0.8 0.15 90)", 0.5, GTK_CSS_COLOR_SPACE_OKLCH, GTK_CSS_HUE_INTERPOLATION_LONGER, "oklch(0.7 0.195 240)" },
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};
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static void
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test_interpolation (gconstpointer data)
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{
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ColorInterpolationTest *test = &interpolation_tests[GPOINTER_TO_INT (data)];
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GtkCssColor input1;
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GtkCssColor input2;
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GtkCssColor expected;
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GtkCssColor result;
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color_from_string (test->input1, &input1);
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color_from_string (test->input2, &input2);
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color_from_string (test->expected, &expected);
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gtk_css_color_interpolate (&input1,
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&input2,
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test->progress,
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test->in,
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test->interp,
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&result);
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if (g_test_verbose ())
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{
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print_css_color ("expected", &expected);
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print_css_color ("interpolated", &result);
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}
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g_assert_true (color_is_near (&result, &expected));
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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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gtk_test_init (&argc, &argv);
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for (int i = 0; i < G_N_ELEMENTS (conversion_tests); i++)
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{
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char *path;
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path = g_strdup_printf ("/css/color/conversion/%d", i);
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g_test_add_data_func (path, GINT_TO_POINTER (i), test_conversion);
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g_free (path);
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}
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for (int i = 0; i < G_N_ELEMENTS (interpolation_tests); i++)
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{
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char *path;
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path = g_strdup_printf ("/css/color/interpolation/%d", i);
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g_test_add_data_func (path, GINT_TO_POINTER (i), test_interpolation);
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g_free (path);
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}
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return g_test_run ();
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}
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@ -52,3 +52,15 @@ test('transition', transition,
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suite: 'css'
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)
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color = executable('color',
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sources: ['color.c'],
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c_args: common_cflags + ['-DGTK_COMPILATION'],
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dependencies: libgtk_static_dep,
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)
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test('color', color,
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args: [ '--tap', '-k'],
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protocol: 'tap',
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env: csstest_env,
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suite: 'css'
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)
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