1 files changed, 59 insertions, 4 deletions
diff --git a/pixman/test/region-test.c b/pixman/test/region-test.c
index e214e9b89..3568969f1 100644
--- a/pixman/test/region-test.c
+++ b/pixman/test/region-test.c
@@ -3,21 +3,76 @@
 #include <stdio.h>
 #include "pixman.h"
 
-/* This used to go into an infinite loop before pixman-region.c
- * was fixed to not use explict "short" variables
- */
 int
 main ()
 {
     pixman_region32_t r1;
     pixman_region32_t r2;
     pixman_region32_t r3;
+    pixman_box32_t boxes[] = {
+	{ 10, 10, 20, 20 },
+	{ 30, 30, 30, 40 },
+	{ 50, 45, 60, 44 },
+    };
+    pixman_box32_t boxes2[] = {
+	{ 2, 6, 7, 6 },
+	{ 4, 1, 6, 7 },
+    };
+    pixman_box32_t boxes3[] = {
+	{ 2, 6, 7, 6 },
+	{ 4, 1, 6, 1 },
+    };
+    int i;
+    pixman_box32_t *b;
 
+    /* This used to go into an infinite loop before pixman-region.c
+     * was fixed to not use explict "short" variables
+     */
     pixman_region32_init_rect (&r1, 0, 0, 20, 64000);
     pixman_region32_init_rect (&r2, 0, 0, 20, 64000);
     pixman_region32_init_rect (&r3, 0, 0, 20, 64000);
 
     pixman_region32_subtract (&r1, &r2, &r3);
 
-}
 
+    /* This would produce a region containing an empty
+     * rectangle in it. Such regions are considered malformed,
+     * but using an empty rectangle for initialization should
+     * work.
+     */
+    pixman_region32_init_rects (&r1, boxes, 3);
+
+    b = pixman_region32_rectangles (&r1, &i);
+
+    assert (i == 1);
+    
+    while (i--)
+    {
+	assert (b[i].x1 < b[i].x2);
+	assert (b[i].y1 < b[i].y2);
+    }
+
+    /* This would produce a rectangle containing the bounding box
+     * of the two rectangles. The correct result is to eliminate
+     * the broken rectangle.
+     */
+    pixman_region32_init_rects (&r1, boxes2, 2);
+
+    b = pixman_region32_rectangles (&r1, &i);
+
+    assert (i == 1);
+
+    assert (b[0].x1 == 4);
+    assert (b[0].y1 == 1);
+    assert (b[0].x2 == 6);
+    assert (b[0].y2 == 7);
+
+    /* This should produce an empty region */
+    pixman_region32_init_rects (&r1, boxes3, 2);
+
+    b = pixman_region32_rectangles (&r1, &i);
+
+    assert (i == 0);
+
+    return 0;
+}