1 files changed, 158 insertions, 0 deletions
diff --git a/src/pixman/test/gradient-crash-test.c b/src/pixman/test/gradient-crash-test.c
new file mode 100644
index 0000000..962d1cb
--- /dev/null
+++ b/src/pixman/test/gradient-crash-test.c
@@ -0,0 +1,158 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "utils.h"
+
+int
+main (int argc, char **argv)
+{
+#define WIDTH 400
+#define HEIGHT 200
+    
+    uint32_t *dest = malloc (WIDTH * HEIGHT * 4);
+    pixman_image_t *src_img;
+    pixman_image_t *dest_img;
+    int i, j, k, p;
+
+    typedef struct
+    {
+	pixman_point_fixed_t p0;
+	pixman_point_fixed_t p1;
+    } point_pair_t;
+    
+    pixman_gradient_stop_t onestop[1] =
+	{
+	    { pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
+	};
+
+    pixman_gradient_stop_t subsetstops[2] =
+	{
+	    { pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
+	    { pixman_int_to_fixed (1), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
+	};
+
+    pixman_gradient_stop_t stops01[2] =
+	{
+	    { pixman_int_to_fixed (0), { 0xffff, 0xeeee, 0xeeee, 0xeeee } },
+	    { pixman_int_to_fixed (1), { 0xffff, 0x1111, 0x1111, 0x1111 } }
+	};
+
+    point_pair_t point_pairs [] =
+	{ { { pixman_double_to_fixed (0), 0 },
+	    { pixman_double_to_fixed (WIDTH / 8.), pixman_int_to_fixed (0) } },
+	  { { pixman_double_to_fixed (WIDTH / 2.0), pixman_double_to_fixed (HEIGHT / 2.0) },
+	    { pixman_double_to_fixed (WIDTH / 2.0), pixman_double_to_fixed (HEIGHT / 2.0) } }
+	};
+    
+    pixman_transform_t transformations[] = {
+	{
+	    { { pixman_double_to_fixed (2), pixman_double_to_fixed (0.5), pixman_double_to_fixed (-100), },
+	      { pixman_double_to_fixed (0), pixman_double_to_fixed (3), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) } 
+	    }
+	},
+	{
+	    { { pixman_double_to_fixed (1), pixman_double_to_fixed (0), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (0), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (0), pixman_double_to_fixed (0.000), pixman_double_to_fixed (1.0) } 
+	    }
+	},
+	{
+	    { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (2), pixman_double_to_fixed (1.000), pixman_double_to_fixed (1.0) } 
+	    }
+	},
+	{
+	    { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (0), pixman_double_to_fixed (0), pixman_double_to_fixed (0) } 
+	    }
+	},
+	{
+	    { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (2), pixman_double_to_fixed (-1), pixman_double_to_fixed (0) } 
+	    }
+	},
+	{
+	    { { pixman_double_to_fixed (2), pixman_double_to_fixed (1), pixman_double_to_fixed (3), },
+	      { pixman_double_to_fixed (1), pixman_double_to_fixed (1), pixman_double_to_fixed (0), },
+	      { pixman_double_to_fixed (2), pixman_double_to_fixed (-1), pixman_double_to_fixed (0) } 
+	    }
+	},
+    };
+    
+    pixman_fixed_t r_inner;
+    pixman_fixed_t r_outer;
+
+    enable_divbyzero_exceptions();
+    
+    for (i = 0; i < WIDTH * HEIGHT; ++i)
+	dest[i] = 0x4f00004f; /* pale blue */
+    
+    dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
+					 WIDTH, HEIGHT, 
+					 dest,
+					 WIDTH * 4);
+
+    r_inner = 0;
+    r_outer = pixman_double_to_fixed (50.0);
+    
+    for (i = 0; i < 3; ++i)
+    {
+	pixman_gradient_stop_t *stops;
+        int num_stops;
+
+	if (i == 0)
+	{
+	    stops = onestop;
+	    num_stops = ARRAY_LENGTH (onestop);
+	}
+	else if (i == 1)
+	{
+	    stops = subsetstops;
+	    num_stops = ARRAY_LENGTH (subsetstops);
+	}
+	else
+	{
+	    stops = stops01;
+	    num_stops = ARRAY_LENGTH (stops01);
+	}
+	
+	for (j = 0; j < 3; ++j)
+	{
+	    for (p = 0; p < ARRAY_LENGTH (point_pairs); ++p)
+	    {
+		point_pair_t *pair = &(point_pairs[p]);
+
+		if (j == 0)
+		    src_img = pixman_image_create_conical_gradient (&(pair->p0), r_inner,
+								    stops, num_stops);
+		else if (j == 1)
+		    src_img = pixman_image_create_radial_gradient  (&(pair->p0), &(pair->p1),
+								    r_inner, r_outer,
+								    stops, num_stops);
+		else
+		    src_img = pixman_image_create_linear_gradient  (&(pair->p0), &(pair->p1),
+								    stops, num_stops);
+		
+		for (k = 0; k < ARRAY_LENGTH (transformations); ++k)
+		{
+		    pixman_image_set_transform (src_img, &transformations[k]);
+		    
+		    pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NONE);
+		    pixman_image_composite (PIXMAN_OP_OVER, src_img, NULL, dest_img,
+					    0, 0, 0, 0, 0, 0, 10 * WIDTH, HEIGHT);
+		}
+
+		pixman_image_unref (src_img);
+	    }
+
+	}
+    }
+
+    pixman_image_unref (dest_img);
+    free (dest);
+    
+    return 0;
+}