[test] Add a new, XFAIL, extend-pad test

test/.gitignore

@@ -37,6 +37,7 @@ dash-zero-length
 degenerate-path
 device-offset
 device-offset-positive
+extend-pad
 extend-reflect
 fallback-resolution
 fallback-resolution.pdf

test/Makefile.am

@@ -31,6 +31,7 @@ dash-state			\
 degenerate-path			\
 device-offset			\
 device-offset-positive		\
+extend-pad			\
 extend-reflect			\
 fill-and-stroke			\
 fill-and-stroke-alpha		\
@@ -220,6 +221,7 @@ device-offset-ref.png					\
 device-offset-rgb24-ref.png				\
 device-offset-positive-ref.png				\
 device-offset-positive-rgb24-ref.png			\
+extend-pad-ref.png					\
 extend-reflect-ref.png					\
 fill-and-stroke-ref.png					\
 fill-and-stroke-rgb24-ref.png				\
@@ -362,6 +364,7 @@ zero-alpha-ref.png
 XFAIL_TESTS =			\
 a8-mask				\
 big-trap			\
+extend-pad			\
 filter-nearest-offset		\
 long-lines			\
 self-intersecting		\

test/extend-pad.c

@@ -0,0 +1,74 @@
+#include <math.h>
+#include "cairo-test.h"
+#include <stdio.h>
+
+#define SIZE 90
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "extend-pad",
+    "Test CAIRO_EXTEND_PAD for surface patterns",
+    SIZE, SIZE,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_surface_t *surface;
+    cairo_t * cr_surface;
+    int surface_size = (SIZE - 30) / 10;
+
+    cairo_set_source_rgba (cr, 0, 0, 0, 1);
+    cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+    cairo_fill (cr);
+
+    /* Create an image surface with my favorite four colors in each
+     * quadrant. */
+    surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
+					  surface_size, surface_size);
+    cr_surface = cairo_create (surface);
+    cairo_set_source_rgb (cr_surface, 1, 1, 1);
+    cairo_rectangle (cr_surface,
+		     0, 0,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_set_source_rgb (cr_surface, 1, 0, 0);
+    cairo_rectangle (cr_surface,
+		     surface_size / 2, 0,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_set_source_rgb (cr_surface, 0, 1, 0);
+    cairo_rectangle (cr_surface,
+		     0, surface_size / 2,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_set_source_rgb (cr_surface, 0, 0, 1);
+    cairo_rectangle (cr_surface,
+		     surface_size / 2, surface_size / 2,
+		     surface_size / 2, surface_size / 2);
+    cairo_fill (cr_surface);
+    cairo_destroy (cr_surface);
+
+    cairo_scale (cr, 10, 10);
+    cairo_set_source_surface (cr, surface, 1.5, 1.5);
+    cairo_surface_destroy (surface);
+
+    /* Using EXTEND_REFLECT makes this test pass for image and xlib backends */
+    /*cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REFLECT);*/
+
+    cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_PAD);
+    cairo_rectangle (cr, 1.5, 1.5, 6, 6);
+    cairo_clip (cr);
+
+    cairo_paint (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}