test: add color-effects testHEADmain

Follow-up of "color: introduce output color effects". This adds a few
sanity tests for color effects.

Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>

9 files changed, 168 insertions, 0 deletions

diff --git a/tests/color-effects-test.c b/tests/color-effects-test.c
new file mode 100644
index 00000000..fca2ffa7
--- /dev/null
+++ b/tests/color-effects-test.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2025 Amazon.com, Inc. or its affiliates
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "config.h"
+
+#include "weston-test-client-helper.h"
+#include "image-iter.h"
+
+static const int WINDOW_WIDTH  = 320;
+static const int WINDOW_HEIGHT = 240;
+
+enum effect_type {
+	EFFECT_TYPE_NONE = 0,
+	EFFECT_TYPE_INVERSION,
+	EFFECT_TYPE_DEUTERANOPIA,
+	EFFECT_TYPE_PROTANOPIA,
+	EFFECT_TYPE_TRITANOPIA,
+};
+
+struct setup_args {
+	struct fixture_metadata meta;
+	enum effect_type type;
+	const char *ref_image_prefix;
+};
+
+static const struct setup_args my_setup_args[] = {
+	{
+		.meta.name = "normal-cat",
+		.ref_image_prefix = "color-effects",
+		.type = EFFECT_TYPE_NONE,
+	},
+	{
+		.meta.name = "inversion-cat",
+		.ref_image_prefix = "color-effects",
+		.type = EFFECT_TYPE_INVERSION,
+	},
+	{
+		.meta.name = "deuteranopia-cat",
+		.ref_image_prefix = "color-effects",
+		.type = EFFECT_TYPE_DEUTERANOPIA,
+	},
+	{
+		.meta.name = "protanopia-cat",
+		.ref_image_prefix = "color-effects",
+		.type = EFFECT_TYPE_PROTANOPIA,
+	},
+	{
+		.meta.name = "tritanopia-cat",
+		.ref_image_prefix = "color-effects",
+		.type = EFFECT_TYPE_TRITANOPIA,
+	},
+};
+
+static const char *
+get_effect_type_str(enum effect_type type)
+{
+	switch (type) {
+	case EFFECT_TYPE_DEUTERANOPIA:
+		return "deuteranopia";
+	case EFFECT_TYPE_PROTANOPIA:
+		return "protanopia";
+	case EFFECT_TYPE_TRITANOPIA:
+		return "tritanopia";
+	case EFFECT_TYPE_INVERSION:
+		return "inversion";
+	case EFFECT_TYPE_NONE:
+		return NULL;
+	};
+	test_assert_not_reached("unknown color effect");
+}
+
+static enum test_result_code
+fixture_setup(struct weston_test_harness *harness, const struct setup_args *arg)
+{
+	struct compositor_setup setup;
+	const char *effect = get_effect_type_str(arg->type);
+
+	compositor_setup_defaults(&setup);
+	setup.shell = SHELL_TEST_DESKTOP;
+	setup.renderer = WESTON_RENDERER_GL;
+	setup.refresh = HIGHEST_OUTPUT_REFRESH;
+	setup.width = WINDOW_WIDTH;
+	setup.height = WINDOW_HEIGHT;
+
+	weston_ini_setup(&setup,
+			 cfgln("[output]"),
+			 cfgln("name=headless"),
+			 effect ? cfgln("color-effect=%s", effect) : cfgln(""));
+
+	return weston_test_harness_execute_as_client(harness, &setup);
+}
+DECLARE_FIXTURE_SETUP_WITH_ARG(fixture_setup, my_setup_args, meta);
+
+TEST(color_effects)
+{
+	int seq_no = get_test_fixture_index();
+	const struct setup_args *arg = &my_setup_args[seq_no];
+	struct client *client;
+	struct buffer *buffer;
+	struct buffer *screenshot;
+	struct wl_surface *surface;
+	const uint32_t width = WINDOW_WIDTH;
+	const uint32_t height = WINDOW_HEIGHT;
+	struct rectangle clip;
+	int frame;
+
+	client = create_client_and_test_surface(0, 0, width, height);
+	test_assert_ptr_not_null(client);
+	surface = client->surface->wl_surface;
+
+	/* move pointer away so it does not interfere */
+	weston_test_move_pointer(client->test->weston_test, 0, 1, 0, 0, 0);
+
+	/* buffer with cat image */
+	buffer = client_buffer_from_image_file(client, "colorful-cat", 1);
+	test_assert_ptr_not_null(buffer);
+
+	/* commit buffer */
+	wl_surface_attach(surface, buffer->proxy, 0, 0);
+	wl_surface_damage_buffer(surface, 0, 0, INT32_MAX, INT32_MAX);
+	frame_callback_set(surface, &frame);
+	wl_surface_commit(surface);
+	frame_callback_wait(client, &frame);
+
+	/* take screenshot */
+	screenshot = capture_screenshot_of_output(client, NULL);
+	test_assert_ptr_not_null(screenshot);
+
+	/* compare to reference image, ignoring background (which also changes
+	 * with color effects, but let's make the test run faster) */
+	clip.x = 0;
+	clip.y = 0;
+	clip.width = pixman_image_get_width(buffer->image);
+	clip.height = pixman_image_get_height(buffer->image);
+	verify_image(screenshot->image, arg->ref_image_prefix, seq_no, &clip, seq_no);
+
+	buffer_destroy(screenshot);
+	buffer_destroy(buffer);
+	client_destroy(client);
+
+	return RESULT_OK;
+}
diff --git a/tests/meson.build b/tests/meson.build
index a276b992..d485f564 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -120,6 +120,7 @@ tests = [
 		'name': 'color-math',
 		'dep_objs': dep_libm,
 	},
+	{	'name': 'color-effects', },
 	{
 		'name': 'color-metadata-errors',
 		'dep_objs': dep_libexec_weston,
diff --git a/tests/reference/color-effects-00.png b/tests/reference/color-effects-00.png
new file mode 100644
index 00000000..550a3d6b
--- /dev/null
+++ b/tests/reference/color-effects-00.png
diff --git a/tests/reference/color-effects-01.png b/tests/reference/color-effects-01.png
new file mode 100644
index 00000000..b2f0b260
--- /dev/null
+++ b/tests/reference/color-effects-01.png
diff --git a/tests/reference/color-effects-02.png b/tests/reference/color-effects-02.png
new file mode 100644
index 00000000..696a218a
--- /dev/null
+++ b/tests/reference/color-effects-02.png
diff --git a/tests/reference/color-effects-03.png b/tests/reference/color-effects-03.png
new file mode 100644
index 00000000..23bc345f
--- /dev/null
+++ b/tests/reference/color-effects-03.png
diff --git a/tests/reference/color-effects-04.png b/tests/reference/color-effects-04.png
new file mode 100644
index 00000000..3eefebdd
--- /dev/null
+++ b/tests/reference/color-effects-04.png
diff --git a/tests/reference/colorful-cat.png b/tests/reference/colorful-cat.png
new file mode 100644
index 00000000..80935c67
--- /dev/null
+++ b/tests/reference/colorful-cat.png
diff --git a/tests/reference/colorful-cat.png.license b/tests/reference/colorful-cat.png.license
new file mode 100644
index 00000000..23b858cd
--- /dev/null
+++ b/tests/reference/colorful-cat.png.license
@@ -0,0 +1,3 @@
+“Look Into My Eyes” by Anthony Ross, Public Domain Dedication (CC0)
+
+https://www.flickr.com/photos/anthony_ross_art/28369550088