[test] Update surface-pattern test to include transformations

The surface-pattern test was very naive, painting a surface pattern
repeated at identity size.  With the new test, the surface pattern
is scaled and rotated.  This reveals a serious bug in the PS backend.

1 files changed, 43 insertions, 51 deletions

diff --git a/test/surface-pattern.c b/test/surface-pattern.c
index 8fe40e668..42aca27fc 100644
--- a/test/surface-pattern.c
+++ b/test/surface-pattern.c
@@ -1,36 +1,15 @@
-/*
- * Copyright © 2005 Red Hat, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without
- * fee, provided that the above copyright notice appear in all copies
- * and that both that copyright notice and this permission notice
- * appear in supporting documentation, and that the name of
- * Red Hat, Inc. not be used in advertising or publicity pertaining to
- * distribution of the software without specific, written prior
- * permission. Red Hat, Inc. makes no representations about the
- * suitability of this software for any purpose.  It is provided "as
- * is" without express or implied warranty.
- *
- * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
- * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
- * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
- * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Author: Carl D. Worth <cworth@cworth.org>
- */
-
+#include <math.h>
 #include "cairo-test.h"
+#include <stdio.h>
+
+#define SIZE 140
 
 static cairo_test_draw_function_t draw;
 
 cairo_test_t test = {
     "surface-pattern",
-    "Tests use of a surface pattern",
-    36, 36,
+    "Test transformed repeated surface patterns",
+    SIZE, SIZE,
     draw
 };
 
@@ -38,35 +17,48 @@ static cairo_test_status_t
 draw (cairo_t *cr, int width, int height)
 {
     cairo_surface_t *surface;
-    cairo_t *cr2;
-    cairo_pattern_t *pattern;
-    surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
-					  6, 6);
-
-    cr2 = cairo_create (surface);
-    {
-	cairo_rectangle (cr2, 0, 0, 3, 3);
-	cairo_rectangle (cr2, 3, 3, 3, 3);
-	cairo_set_source_rgb (cr2, 1, 1, 0);
-	cairo_fill (cr2);
-
-	cairo_rectangle (cr2, 3, 0, 3, 3);
-	cairo_rectangle (cr2, 0, 3, 3, 3);
-	cairo_set_source_rgb (cr2, 0, 0, 1);
-	cairo_fill (cr2);
-    }
-    cairo_destroy (cr2);
+    cairo_t * cr_surface;
+    int surface_size = 6;
 
-    pattern = cairo_pattern_create_for_surface (surface);
-    cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
-    cairo_set_source (cr, pattern);
-
-    cairo_rectangle (cr, 0, 0, width, height);
+    cairo_set_source_rgb (cr, 0, 0, 0);
+    cairo_rectangle (cr, 0, 0, SIZE, SIZE);
     cairo_fill (cr);
 
-    cairo_pattern_destroy (pattern);
+    /* 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_rotate (cr, 1.);
+    cairo_set_source_surface (cr, surface, 1.5, 1.5);
     cairo_surface_destroy (surface);
 
+    cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
+    cairo_paint (cr);
+
     return CAIRO_TEST_SUCCESS;
 }