libX11 mesa pixman git update 9 nov 2011

1 files changed, 367 insertions, 368 deletions

diff --git a/pixman/test/scaling-test.c b/pixman/test/scaling-test.c
index f247e1e9a..6f2da1432 100644
--- a/pixman/test/scaling-test.c
+++ b/pixman/test/scaling-test.c
@@ -1,368 +1,367 @@
-/*

- * Test program, which can detect some problems with nearest neighbour

- * and bilinear scaling in pixman. Testing is done by running lots

- * of random SRC and OVER compositing operations a8r8g8b8, x8a8r8g8b8

- * and r5g6b5 color formats.

- *

- * Script 'fuzzer-find-diff.pl' can be used to narrow down the problem in

- * the case of test failure.

- */

-#include <assert.h>

-#include <stdlib.h>

-#include <stdio.h>

-#include "utils.h"

-

-#define MAX_SRC_WIDTH  48

-#define MAX_SRC_HEIGHT 8

-#define MAX_DST_WIDTH  48

-#define MAX_DST_HEIGHT 8

-#define MAX_STRIDE     4

-

-/*

- * Composite operation with pseudorandom images

- */

-uint32_t

-test_composite (int      testnum,

-		int      verbose)

-{

-    int                i;

-    pixman_image_t *   src_img;

-    pixman_image_t *   mask_img;

-    pixman_image_t *   dst_img;

-    pixman_transform_t transform;

-    pixman_region16_t  clip;

-    int                src_width, src_height;

-    int                mask_width, mask_height;

-    int                dst_width, dst_height;

-    int                src_stride, mask_stride, dst_stride;

-    int                src_x, src_y;

-    int                mask_x, mask_y;

-    int                dst_x, dst_y;

-    int                src_bpp;

-    int                mask_bpp = 1;

-    int                dst_bpp;

-    int                w, h;

-    pixman_fixed_t     scale_x = 65536, scale_y = 65536;

-    pixman_fixed_t     translate_x = 0, translate_y = 0;

-    pixman_fixed_t     mask_scale_x = 65536, mask_scale_y = 65536;

-    pixman_fixed_t     mask_translate_x = 0, mask_translate_y = 0;

-    pixman_op_t        op;

-    pixman_repeat_t    repeat = PIXMAN_REPEAT_NONE;

-    pixman_repeat_t    mask_repeat = PIXMAN_REPEAT_NONE;

-    pixman_format_code_t src_fmt, dst_fmt;

-    uint32_t *         srcbuf;

-    uint32_t *         dstbuf;

-    uint32_t *         maskbuf;

-    uint32_t           crc32;

-    FLOAT_REGS_CORRUPTION_DETECTOR_START ();

-

-    lcg_srand (testnum);

-

-    src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;

-    dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;

-    switch (lcg_rand_n (3))

-    {

-    case 0:

-	op = PIXMAN_OP_SRC;

-	break;

-    case 1:

-	op = PIXMAN_OP_OVER;

-	break;

-    default:

-	op = PIXMAN_OP_ADD;

-	break;

-    }

-

-    src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;

-    src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;

-

-    if (lcg_rand_n (2))

-    {

-	mask_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;

-	mask_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;

-    }

-    else

-    {

-	mask_width = mask_height = 1;

-    }

-

-    dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;

-    dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;

-    src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;

-    mask_stride = mask_width * mask_bpp + lcg_rand_n (MAX_STRIDE) * mask_bpp;

-    dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;

-

-    if (src_stride & 3)

-	src_stride += 2;

-

-    if (mask_stride & 1)

-	mask_stride += 1;

-    if (mask_stride & 2)

-	mask_stride += 2;

-

-    if (dst_stride & 3)

-	dst_stride += 2;

-

-    src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);

-    src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);

-    mask_x = -(mask_width / 4) + lcg_rand_n (mask_width * 3 / 2);

-    mask_y = -(mask_height / 4) + lcg_rand_n (mask_height * 3 / 2);

-    dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);

-    dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);

-    w = lcg_rand_n (dst_width * 3 / 2 - dst_x);

-    h = lcg_rand_n (dst_height * 3 / 2 - dst_y);

-

-    srcbuf = (uint32_t *)malloc (src_stride * src_height);

-    maskbuf = (uint32_t *)malloc (mask_stride * mask_height);

-    dstbuf = (uint32_t *)malloc (dst_stride * dst_height);

-

-    for (i = 0; i < src_stride * src_height; i++)

-	*((uint8_t *)srcbuf + i) = lcg_rand_n (256);

-

-    for (i = 0; i < mask_stride * mask_height; i++)

-	*((uint8_t *)maskbuf + i) = lcg_rand_n (256);

-

-    for (i = 0; i < dst_stride * dst_height; i++)

-	*((uint8_t *)dstbuf + i) = lcg_rand_n (256);

-

-    src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ?

-                              PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;

-

-    dst_fmt = dst_bpp == 4 ? (lcg_rand_n (2) == 0 ?

-                              PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;

-

-    src_img = pixman_image_create_bits (

-        src_fmt, src_width, src_height, srcbuf, src_stride);

-

-    mask_img = pixman_image_create_bits (

-        PIXMAN_a8, mask_width, mask_height, maskbuf, mask_stride);

-

-    dst_img = pixman_image_create_bits (

-        dst_fmt, dst_width, dst_height, dstbuf, dst_stride);

-

-    image_endian_swap (src_img);

-    image_endian_swap (dst_img);

-

-    if (lcg_rand_n (4) > 0)

-    {

-	scale_x = -32768 * 3 + lcg_rand_N (65536 * 5);

-	scale_y = -32768 * 3 + lcg_rand_N (65536 * 5);

-	translate_x = lcg_rand_N (65536);

-	translate_y = lcg_rand_N (65536);

-	pixman_transform_init_scale (&transform, scale_x, scale_y);

-	pixman_transform_translate (&transform, NULL, translate_x, translate_y);

-	pixman_image_set_transform (src_img, &transform);

-    }

-

-    if (lcg_rand_n (2) > 0)

-    {

-	mask_scale_x = -32768 * 3 + lcg_rand_N (65536 * 5);

-	mask_scale_y = -32768 * 3 + lcg_rand_N (65536 * 5);

-	mask_translate_x = lcg_rand_N (65536);

-	mask_translate_y = lcg_rand_N (65536);

-	pixman_transform_init_scale (&transform, mask_scale_x, mask_scale_y);

-	pixman_transform_translate (&transform, NULL, mask_translate_x, mask_translate_y);

-	pixman_image_set_transform (mask_img, &transform);

-    }

-

-    switch (lcg_rand_n (4))

-    {

-    case 0:

-	mask_repeat = PIXMAN_REPEAT_NONE;

-	break;

-

-    case 1:

-	mask_repeat = PIXMAN_REPEAT_NORMAL;

-	break;

-

-    case 2:

-	mask_repeat = PIXMAN_REPEAT_PAD;

-	break;

-

-    case 3:

-	mask_repeat = PIXMAN_REPEAT_REFLECT;

-	break;

-

-    default:

-        break;

-    }

-    pixman_image_set_repeat (mask_img, mask_repeat);

-

-    switch (lcg_rand_n (4))

-    {

-    case 0:

-	repeat = PIXMAN_REPEAT_NONE;

-	break;

-

-    case 1:

-	repeat = PIXMAN_REPEAT_NORMAL;

-	break;

-

-    case 2:

-	repeat = PIXMAN_REPEAT_PAD;

-	break;

-

-    case 3:

-	repeat = PIXMAN_REPEAT_REFLECT;

-	break;

-

-    default:

-        break;

-    }

-    pixman_image_set_repeat (src_img, repeat);

-

-    if (lcg_rand_n (2))

-	pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);

-    else

-	pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);

-

-    if (lcg_rand_n (2))

-	pixman_image_set_filter (mask_img, PIXMAN_FILTER_NEAREST, NULL, 0);

-    else

-	pixman_image_set_filter (mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0);

-

-    if (verbose)

-    {

-	printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);

-	printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n",

-	        op, scale_x, scale_y, repeat);

-	printf ("translate_x=%d, translate_y=%d\n",

-	        translate_x, translate_y);

-	printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",

-	        src_width, src_height, dst_width, dst_height);

-	printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",

-	        src_x, src_y, dst_x, dst_y);

-	printf ("w=%d, h=%d\n", w, h);

-    }

-

-    if (lcg_rand_n (8) == 0)

-    {

-	pixman_box16_t clip_boxes[2];

-	int            n = lcg_rand_n (2) + 1;

-

-	for (i = 0; i < n; i++)

-	{

-	    clip_boxes[i].x1 = lcg_rand_n (src_width);

-	    clip_boxes[i].y1 = lcg_rand_n (src_height);

-	    clip_boxes[i].x2 =

-		clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);

-	    clip_boxes[i].y2 =

-		clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);

-

-	    if (verbose)

-	    {

-		printf ("source clip box: [%d,%d-%d,%d]\n",

-		        clip_boxes[i].x1, clip_boxes[i].y1,

-		        clip_boxes[i].x2, clip_boxes[i].y2);

-	    }

-	}

-

-	pixman_region_init_rects (&clip, clip_boxes, n);

-	pixman_image_set_clip_region (src_img, &clip);

-	pixman_image_set_source_clipping (src_img, 1);

-	pixman_region_fini (&clip);

-    }

-

-    if (lcg_rand_n (8) == 0)

-    {

-	pixman_box16_t clip_boxes[2];

-	int            n = lcg_rand_n (2) + 1;

-

-	for (i = 0; i < n; i++)

-	{

-	    clip_boxes[i].x1 = lcg_rand_n (mask_width);

-	    clip_boxes[i].y1 = lcg_rand_n (mask_height);

-	    clip_boxes[i].x2 =

-		clip_boxes[i].x1 + lcg_rand_n (mask_width - clip_boxes[i].x1);

-	    clip_boxes[i].y2 =

-		clip_boxes[i].y1 + lcg_rand_n (mask_height - clip_boxes[i].y1);

-

-	    if (verbose)

-	    {

-		printf ("mask clip box: [%d,%d-%d,%d]\n",

-		        clip_boxes[i].x1, clip_boxes[i].y1,

-		        clip_boxes[i].x2, clip_boxes[i].y2);

-	    }

-	}

-

-	pixman_region_init_rects (&clip, clip_boxes, n);

-	pixman_image_set_clip_region (mask_img, &clip);

-	pixman_image_set_source_clipping (mask_img, 1);

-	pixman_region_fini (&clip);

-    }

-

-    if (lcg_rand_n (8) == 0)

-    {

-	pixman_box16_t clip_boxes[2];

-	int            n = lcg_rand_n (2) + 1;

-	for (i = 0; i < n; i++)

-	{

-	    clip_boxes[i].x1 = lcg_rand_n (dst_width);

-	    clip_boxes[i].y1 = lcg_rand_n (dst_height);

-	    clip_boxes[i].x2 =

-		clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);

-	    clip_boxes[i].y2 =

-		clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);

-

-	    if (verbose)

-	    {

-		printf ("destination clip box: [%d,%d-%d,%d]\n",

-		        clip_boxes[i].x1, clip_boxes[i].y1,

-		        clip_boxes[i].x2, clip_boxes[i].y2);

-	    }

-	}

-	pixman_region_init_rects (&clip, clip_boxes, n);

-	pixman_image_set_clip_region (dst_img, &clip);

-	pixman_region_fini (&clip);

-    }

-

-    if (lcg_rand_n (2) == 0)

-	pixman_image_composite (op, src_img, NULL, dst_img,

-                            src_x, src_y, 0, 0, dst_x, dst_y, w, h);

-    else

-	pixman_image_composite (op, src_img, mask_img, dst_img,

-                            src_x, src_y, mask_x, mask_y, dst_x, dst_y, w, h);

-

-    if (dst_fmt == PIXMAN_x8r8g8b8)

-    {

-	/* ignore unused part */

-	for (i = 0; i < dst_stride * dst_height / 4; i++)

-	    dstbuf[i] &= 0xFFFFFF;

-    }

-

-    image_endian_swap (dst_img);

-

-    if (verbose)

-    {

-	int j;

-	

-	for (i = 0; i < dst_height; i++)

-	{

-	    for (j = 0; j < dst_stride; j++)

-		printf ("%02X ", *((uint8_t *)dstbuf + i * dst_stride + j));

-

-	    printf ("\n");

-	}

-    }

-

-    pixman_image_unref (src_img);

-    pixman_image_unref (mask_img);

-    pixman_image_unref (dst_img);

-

-    crc32 = compute_crc32 (0, dstbuf, dst_stride * dst_height);

-    free (srcbuf);

-    free (maskbuf);

-    free (dstbuf);

-

-    FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();

-    return crc32;

-}

-

-int

-main (int argc, const char *argv[])

-{

-    pixman_disable_out_of_bounds_workaround ();

-

-    return fuzzer_test_main("scaling", 8000000, 0x80DF1CB2,

-			    test_composite, argc, argv);

-}

+/*
+ * Test program, which can detect some problems with nearest neighbour
+ * and bilinear scaling in pixman. Testing is done by running lots
+ * of random SRC and OVER compositing operations a8r8g8b8, x8a8r8g8b8
+ * and r5g6b5 color formats.
+ *
+ * Script 'fuzzer-find-diff.pl' can be used to narrow down the problem in
+ * the case of test failure.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include "utils.h"
+
+#define MAX_SRC_WIDTH  48
+#define MAX_SRC_HEIGHT 8
+#define MAX_DST_WIDTH  48
+#define MAX_DST_HEIGHT 8
+#define MAX_STRIDE     4
+
+/*
+ * Composite operation with pseudorandom images
+ */
+uint32_t
+test_composite (int      testnum,
+		int      verbose)
+{
+    int                i;
+    pixman_image_t *   src_img;
+    pixman_image_t *   mask_img;
+    pixman_image_t *   dst_img;
+    pixman_transform_t transform;
+    pixman_region16_t  clip;
+    int                src_width, src_height;
+    int                mask_width, mask_height;
+    int                dst_width, dst_height;
+    int                src_stride, mask_stride, dst_stride;
+    int                src_x, src_y;
+    int                mask_x, mask_y;
+    int                dst_x, dst_y;
+    int                src_bpp;
+    int                mask_bpp = 1;
+    int                dst_bpp;
+    int                w, h;
+    pixman_fixed_t     scale_x = 65536, scale_y = 65536;
+    pixman_fixed_t     translate_x = 0, translate_y = 0;
+    pixman_fixed_t     mask_scale_x = 65536, mask_scale_y = 65536;
+    pixman_fixed_t     mask_translate_x = 0, mask_translate_y = 0;
+    pixman_op_t        op;
+    pixman_repeat_t    repeat = PIXMAN_REPEAT_NONE;
+    pixman_repeat_t    mask_repeat = PIXMAN_REPEAT_NONE;
+    pixman_format_code_t src_fmt, dst_fmt;
+    uint32_t *         srcbuf;
+    uint32_t *         dstbuf;
+    uint32_t *         maskbuf;
+    uint32_t           crc32;
+    FLOAT_REGS_CORRUPTION_DETECTOR_START ();
+
+    lcg_srand (testnum);
+
+    src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
+    dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
+    switch (lcg_rand_n (3))
+    {
+    case 0:
+	op = PIXMAN_OP_SRC;
+	break;
+    case 1:
+	op = PIXMAN_OP_OVER;
+	break;
+    default:
+	op = PIXMAN_OP_ADD;
+	break;
+    }
+
+    src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
+    src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
+
+    if (lcg_rand_n (2))
+    {
+	mask_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
+	mask_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
+    }
+    else
+    {
+	mask_width = mask_height = 1;
+    }
+
+    dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
+    dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
+    src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
+    mask_stride = mask_width * mask_bpp + lcg_rand_n (MAX_STRIDE) * mask_bpp;
+    dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
+
+    if (src_stride & 3)
+	src_stride += 2;
+
+    if (mask_stride & 1)
+	mask_stride += 1;
+    if (mask_stride & 2)
+	mask_stride += 2;
+
+    if (dst_stride & 3)
+	dst_stride += 2;
+
+    src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
+    src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
+    mask_x = -(mask_width / 4) + lcg_rand_n (mask_width * 3 / 2);
+    mask_y = -(mask_height / 4) + lcg_rand_n (mask_height * 3 / 2);
+    dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
+    dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
+    w = lcg_rand_n (dst_width * 3 / 2 - dst_x);
+    h = lcg_rand_n (dst_height * 3 / 2 - dst_y);
+
+    srcbuf = (uint32_t *)malloc (src_stride * src_height);
+    maskbuf = (uint32_t *)malloc (mask_stride * mask_height);
+    dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
+
+    for (i = 0; i < src_stride * src_height; i++)
+	*((uint8_t *)srcbuf + i) = lcg_rand_n (256);
+
+    for (i = 0; i < mask_stride * mask_height; i++)
+	*((uint8_t *)maskbuf + i) = lcg_rand_n (256);
+
+    for (i = 0; i < dst_stride * dst_height; i++)
+	*((uint8_t *)dstbuf + i) = lcg_rand_n (256);
+
+    src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ?
+                              PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
+
+    dst_fmt = dst_bpp == 4 ? (lcg_rand_n (2) == 0 ?
+                              PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
+
+    src_img = pixman_image_create_bits (
+        src_fmt, src_width, src_height, srcbuf, src_stride);
+
+    mask_img = pixman_image_create_bits (
+        PIXMAN_a8, mask_width, mask_height, maskbuf, mask_stride);
+
+    dst_img = pixman_image_create_bits (
+        dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
+
+    image_endian_swap (src_img);
+    image_endian_swap (dst_img);
+
+    if (lcg_rand_n (4) > 0)
+    {
+	scale_x = -32768 * 3 + lcg_rand_N (65536 * 5);
+	scale_y = -32768 * 3 + lcg_rand_N (65536 * 5);
+	translate_x = lcg_rand_N (65536);
+	translate_y = lcg_rand_N (65536);
+	pixman_transform_init_scale (&transform, scale_x, scale_y);
+	pixman_transform_translate (&transform, NULL, translate_x, translate_y);
+	pixman_image_set_transform (src_img, &transform);
+    }
+
+    if (lcg_rand_n (2) > 0)
+    {
+	mask_scale_x = -32768 * 3 + lcg_rand_N (65536 * 5);
+	mask_scale_y = -32768 * 3 + lcg_rand_N (65536 * 5);
+	mask_translate_x = lcg_rand_N (65536);
+	mask_translate_y = lcg_rand_N (65536);
+	pixman_transform_init_scale (&transform, mask_scale_x, mask_scale_y);
+	pixman_transform_translate (&transform, NULL, mask_translate_x, mask_translate_y);
+	pixman_image_set_transform (mask_img, &transform);
+    }
+
+    switch (lcg_rand_n (4))
+    {
+    case 0:
+	mask_repeat = PIXMAN_REPEAT_NONE;
+	break;
+
+    case 1:
+	mask_repeat = PIXMAN_REPEAT_NORMAL;
+	break;
+
+    case 2:
+	mask_repeat = PIXMAN_REPEAT_PAD;
+	break;
+
+    case 3:
+	mask_repeat = PIXMAN_REPEAT_REFLECT;
+	break;
+
+    default:
+        break;
+    }
+    pixman_image_set_repeat (mask_img, mask_repeat);
+
+    switch (lcg_rand_n (4))
+    {
+    case 0:
+	repeat = PIXMAN_REPEAT_NONE;
+	break;
+
+    case 1:
+	repeat = PIXMAN_REPEAT_NORMAL;
+	break;
+
+    case 2:
+	repeat = PIXMAN_REPEAT_PAD;
+	break;
+
+    case 3:
+	repeat = PIXMAN_REPEAT_REFLECT;
+	break;
+
+    default:
+        break;
+    }
+    pixman_image_set_repeat (src_img, repeat);
+
+    if (lcg_rand_n (2))
+	pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
+    else
+	pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
+
+    if (lcg_rand_n (2))
+	pixman_image_set_filter (mask_img, PIXMAN_FILTER_NEAREST, NULL, 0);
+    else
+	pixman_image_set_filter (mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
+
+    if (verbose)
+    {
+	printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);
+	printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n",
+	        op, scale_x, scale_y, repeat);
+	printf ("translate_x=%d, translate_y=%d\n",
+	        translate_x, translate_y);
+	printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
+	        src_width, src_height, dst_width, dst_height);
+	printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",
+	        src_x, src_y, dst_x, dst_y);
+	printf ("w=%d, h=%d\n", w, h);
+    }
+
+    if (lcg_rand_n (8) == 0)
+    {
+	pixman_box16_t clip_boxes[2];
+	int            n = lcg_rand_n (2) + 1;
+
+	for (i = 0; i < n; i++)
+	{
+	    clip_boxes[i].x1 = lcg_rand_n (src_width);
+	    clip_boxes[i].y1 = lcg_rand_n (src_height);
+	    clip_boxes[i].x2 =
+		clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
+	    clip_boxes[i].y2 =
+		clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);
+
+	    if (verbose)
+	    {
+		printf ("source clip box: [%d,%d-%d,%d]\n",
+		        clip_boxes[i].x1, clip_boxes[i].y1,
+		        clip_boxes[i].x2, clip_boxes[i].y2);
+	    }
+	}
+
+	pixman_region_init_rects (&clip, clip_boxes, n);
+	pixman_image_set_clip_region (src_img, &clip);
+	pixman_image_set_source_clipping (src_img, 1);
+	pixman_region_fini (&clip);
+    }
+
+    if (lcg_rand_n (8) == 0)
+    {
+	pixman_box16_t clip_boxes[2];
+	int            n = lcg_rand_n (2) + 1;
+
+	for (i = 0; i < n; i++)
+	{
+	    clip_boxes[i].x1 = lcg_rand_n (mask_width);
+	    clip_boxes[i].y1 = lcg_rand_n (mask_height);
+	    clip_boxes[i].x2 =
+		clip_boxes[i].x1 + lcg_rand_n (mask_width - clip_boxes[i].x1);
+	    clip_boxes[i].y2 =
+		clip_boxes[i].y1 + lcg_rand_n (mask_height - clip_boxes[i].y1);
+
+	    if (verbose)
+	    {
+		printf ("mask clip box: [%d,%d-%d,%d]\n",
+		        clip_boxes[i].x1, clip_boxes[i].y1,
+		        clip_boxes[i].x2, clip_boxes[i].y2);
+	    }
+	}
+
+	pixman_region_init_rects (&clip, clip_boxes, n);
+	pixman_image_set_clip_region (mask_img, &clip);
+	pixman_image_set_source_clipping (mask_img, 1);
+	pixman_region_fini (&clip);
+    }
+
+    if (lcg_rand_n (8) == 0)
+    {
+	pixman_box16_t clip_boxes[2];
+	int            n = lcg_rand_n (2) + 1;
+	for (i = 0; i < n; i++)
+	{
+	    clip_boxes[i].x1 = lcg_rand_n (dst_width);
+	    clip_boxes[i].y1 = lcg_rand_n (dst_height);
+	    clip_boxes[i].x2 =
+		clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
+	    clip_boxes[i].y2 =
+		clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);
+
+	    if (verbose)
+	    {
+		printf ("destination clip box: [%d,%d-%d,%d]\n",
+		        clip_boxes[i].x1, clip_boxes[i].y1,
+		        clip_boxes[i].x2, clip_boxes[i].y2);
+	    }
+	}
+	pixman_region_init_rects (&clip, clip_boxes, n);
+	pixman_image_set_clip_region (dst_img, &clip);
+	pixman_region_fini (&clip);
+    }
+
+    if (lcg_rand_n (2) == 0)
+	pixman_image_composite (op, src_img, NULL, dst_img,
+                            src_x, src_y, 0, 0, dst_x, dst_y, w, h);
+    else
+	pixman_image_composite (op, src_img, mask_img, dst_img,
+                            src_x, src_y, mask_x, mask_y, dst_x, dst_y, w, h);
+
+    if (dst_fmt == PIXMAN_x8r8g8b8)
+    {
+	/* ignore unused part */
+	for (i = 0; i < dst_stride * dst_height / 4; i++)
+	    dstbuf[i] &= 0xFFFFFF;
+    }
+
+    image_endian_swap (dst_img);
+
+    if (verbose)
+    {
+	int j;
+	
+	for (i = 0; i < dst_height; i++)
+	{
+	    for (j = 0; j < dst_stride; j++)
+		printf ("%02X ", *((uint8_t *)dstbuf + i * dst_stride + j));
+
+	    printf ("\n");
+	}
+    }
+
+    pixman_image_unref (src_img);
+    pixman_image_unref (mask_img);
+    pixman_image_unref (dst_img);
+
+    crc32 = compute_crc32 (0, dstbuf, dst_stride * dst_height);
+    free (srcbuf);
+    free (maskbuf);
+    free (dstbuf);
+
+    FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();
+    return crc32;
+}
+
+int
+main (int argc, const char *argv[])
+{
+    pixman_disable_out_of_bounds_workaround ();
+
+    return fuzzer_test_main("scaling", 8000000, 0x80DF1CB2,
+			    test_composite, argc, argv);
+}