Add a test with operator samples from https://cairographics.org/operators/

1 files changed, 167 insertions, 0 deletions

diff --git a/test/operator-www.c b/test/operator-www.c
new file mode 100644
index 000000000..36bed8db3
--- /dev/null
+++ b/test/operator-www.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright © 2011 Nis Martensen
+ *
+ * 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 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 "cairo-test.h"
+
+#define OPERATORS_COUNT 29
+#define WIDTH 160
+#define HEIGHT 120
+
+void
+example (cairo_t *cr, char *name)
+{
+    cairo_save (cr);
+
+    cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
+    cairo_clip (cr);
+
+    cairo_rectangle (cr, 0, 0, 120, 90);
+    cairo_set_source_rgba (cr, 0.7, 0, 0, 0.8);
+    cairo_fill (cr);
+
+    if (strcmp (name, "clear") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+
+    else if (strcmp (name, "source") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    else if (strcmp (name, "over") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+    else if (strcmp (name, "in") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_IN);
+    else if (strcmp (name, "out") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_OUT);
+    else if (strcmp (name, "atop") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_ATOP);
+
+    else if (strcmp (name, "dest") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DEST);
+    else if (strcmp (name, "dest_over") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
+    else if (strcmp (name, "dest_in") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DEST_IN);
+    else if (strcmp (name, "dest_out") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OUT);
+    else if (strcmp (name, "dest_atop") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DEST_ATOP);
+
+    else if (strcmp (name, "xor") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_XOR);
+    else if (strcmp (name, "add") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
+    else if (strcmp (name, "saturate") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_SATURATE);
+    else if (strcmp (name, "multiply") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_MULTIPLY);
+    else if (strcmp (name, "screen") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_SCREEN);
+    else if (strcmp (name, "overlay") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_OVERLAY);
+    else if (strcmp (name, "darken") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DARKEN);
+    else if (strcmp (name, "lighten") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_LIGHTEN);
+    else if (strcmp (name, "color_dodge") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_COLOR_DODGE);
+    else if (strcmp (name, "color_burn") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_COLOR_BURN);
+    else if (strcmp (name, "hard_light") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_HARD_LIGHT);
+    else if (strcmp (name, "soft_light") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_SOFT_LIGHT);
+    else if (strcmp (name, "difference") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_DIFFERENCE);
+    else if (strcmp (name, "exclusion") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_EXCLUSION);
+    else if (strcmp (name, "hsl_hue") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_HSL_HUE);
+    else if (strcmp (name, "hsl_saturation") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_HSL_SATURATION);
+    else if (strcmp (name, "hsl_color") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_HSL_COLOR);
+    else if (strcmp (name, "hsl_luminosity") == 0)
+	cairo_set_operator (cr, CAIRO_OPERATOR_HSL_LUMINOSITY);
+
+    cairo_rectangle (cr, 40, 30, 120, 90);
+    cairo_set_source_rgba (cr, 0, 0, 0.9, 0.4);
+    cairo_fill (cr);
+
+    cairo_restore (cr);
+
+    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size(cr, 17);
+    cairo_move_to (cr, WIDTH + 20, 70);
+    cairo_set_source_rgb (cr, 1, 1, 0);
+    cairo_show_text (cr, name);
+
+    cairo_translate (cr, 0, HEIGHT);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    example (cr, "clear");
+
+    example (cr, "source");
+    example (cr, "over");
+    example (cr, "in");
+    example (cr, "out");
+    example (cr, "atop");
+
+    example (cr, "dest");
+    example (cr, "dest_over");
+    example (cr, "dest_in");
+    example (cr, "dest_out");
+    example (cr, "dest_atop");
+
+    example (cr, "xor");
+    example (cr, "add");
+    example (cr, "saturate");
+
+    example (cr, "multiply");
+    example (cr, "screen");
+    example (cr, "overlay");
+    example (cr, "darken");
+    example (cr, "lighten");
+    example (cr, "color_dodge");
+    example (cr, "color_burn");
+    example (cr, "hard_light");
+    example (cr, "soft_light");
+    example (cr, "difference");
+    example (cr, "exclusion");
+    example (cr, "hsl_hue");
+    example (cr, "hsl_saturation");
+    example (cr, "hsl_color");
+    example (cr, "hsl_luminosity");
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (operator_www,
+	    "Operator samples from https://cairographics.org/operators/",
+	    "operator", /* keywords */
+	    NULL, /* requirements */
+	    WIDTH * 2, HEIGHT * OPERATORS_COUNT,
+	    NULL, draw)