tests: conditionally skip part of alpha-blending

One of the three fixture setups of alpha-blending test requires
color-lcms.so. If color-lcms.so is not built, that fixture fails.

Make it skip as necessary, making the test suite pass with
color-management-lcms=false build option.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

libweston/color-lcms/meson.build

@@ -1,4 +1,7 @@
-if not get_option('color-management-lcms')
+build_color_lcms = get_option('color-management-lcms')
+config_h.set10('BUILD_COLOR_LCMS', build_color_lcms)
+
+if not build_color_lcms
 	subdir_done()
 endif
 

tests/alpha-blending-test.c

@@ -73,6 +73,10 @@ fixture_setup(struct weston_test_harness *harness, const struct setup_args *arg)
 	setup.shell = SHELL_TEST_DESKTOP;
 
 	if (arg->color_management) {
+#if !BUILD_COLOR_LCMS
+		return RESULT_SKIP;
+#endif
+
 		weston_ini_setup(&setup,
 				 cfgln("[core]"),
 				 cfgln("color-management=true"));