1 files changed, 125 insertions, 0 deletions
diff --git a/src/pixman/test/region-test.c b/src/pixman/test/region-test.c
new file mode 100644
index 0000000..bfc219b
--- /dev/null
+++ b/src/pixman/test/region-test.c
@@ -0,0 +1,125 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "utils.h"
+
+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, j;
+    pixman_box32_t *b;
+    pixman_image_t *image, *fill;
+    pixman_color_t white = {
+	0xffff,
+	0xffff,
+	0xffff,
+	0xffff
+    };
+
+    prng_srand (0);
+
+    /* 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);
+
+    fill = pixman_image_create_solid_fill (&white);
+    for (i = 0; i < 100; i++)
+    {
+	int image_size = 128;
+
+	pixman_region32_init (&r1);
+
+	/* Add some random rectangles */
+	for (j = 0; j < 64; j++)
+	    pixman_region32_union_rect (&r1, &r1,
+					prng_rand_n (image_size),
+					prng_rand_n (image_size),
+					prng_rand_n (25),
+					prng_rand_n (25));
+
+	/* Clip to image size */
+	pixman_region32_init_rect (&r2, 0, 0, image_size, image_size);
+	pixman_region32_intersect (&r1, &r1, &r2);
+	pixman_region32_fini (&r2);
+
+	/* render region to a1 mask */
+	image = pixman_image_create_bits (PIXMAN_a1, image_size, image_size, NULL, 0);
+	pixman_image_set_clip_region32 (image, &r1);
+	pixman_image_composite32 (PIXMAN_OP_SRC,
+				  fill, NULL, image,
+				  0, 0, 0, 0, 0, 0,
+				  image_size, image_size);
+	pixman_region32_init_from_image (&r2, image);
+
+	pixman_image_unref (image);
+
+	assert (pixman_region32_equal (&r1, &r2));
+	pixman_region32_fini (&r1);
+	pixman_region32_fini (&r2);
+
+    }
+    pixman_image_unref (fill);
+
+    return 0;
+}