test: Add affine-test

This test tests compositing with various affine transformations. It is
almost identical to scaling-test, except that it also applies a random
rotation in addition to the random scaling and translation.

diff --git a/test/Makefile.am b/test/Makefile.am
index f3b2b58..ff851c9 100644 (file)
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -18,6 +18,7 @@ TESTPROGRAMS =                        \
        alphamap                \
        blitters-test           \
        scaling-test            \
+       affine-test             \
        composite
 
 a1_trap_test_LDADD = $(TEST_LDADD)
@@ -39,6 +40,9 @@ blitters_test_SOURCES = blitters-test.c utils.c utils.h
 scaling_test_LDADD = $(TEST_LDADD)
 scaling_test_SOURCES = scaling-test.c utils.c utils.h
 
+affine_test_LDADD = $(TEST_LDADD)
+affine_test_SOURCES = affine-test.c utils.c utils.h
+
 alphamap_LDADD = $(TEST_LDADD)
 alphamap_SOURCES = alphamap.c utils.c utils.h
 

diff --git a/test/affine-test.c b/test/affine-test.c
new file mode 100644 (file)
index 0000000..27f2567
--- /dev/null
+++ b/test/affine-test.c
@@ -0,0 +1,261 @@
+/*
+ * Test program, which can detect some problems with affine transformations
+ * in pixman. Testing is done by running lots of random SRC and OVER
+ * compositing operations a8r8g8b8, x8a8r8g8b8, r5g6b5 and a8 color formats
+ * with random scaled, rotated and translated transforms.
+ *
+ * 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  16
+#define MAX_SRC_HEIGHT 16
+#define MAX_DST_WIDTH  16
+#define MAX_DST_HEIGHT 16
+#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 *   dst_img;
+    pixman_transform_t transform;
+    pixman_region16_t  clip;
+    int                src_width, src_height;
+    int                dst_width, dst_height;
+    int                src_stride, dst_stride;
+    int                src_x, src_y;
+    int                dst_x, dst_y;
+    int                src_bpp;
+    int                dst_bpp;
+    int                w, h;
+    pixman_fixed_t     scale_x = 65536, scale_y = 65536;
+    pixman_fixed_t     translate_x = 0, translate_y = 0;
+    int                op;
+    int                repeat = 0;
+    int                src_fmt, dst_fmt;
+    uint32_t *         srcbuf;
+    uint32_t *         dstbuf;
+    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;
+    op = (lcg_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
+
+    src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
+    src_height = lcg_rand_n (MAX_SRC_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;
+    dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
+
+    if (src_stride & 3)
+       src_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);
+    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);
+    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 < 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);
+
+    dst_img = pixman_image_create_bits (
+        dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
+
+    image_endian_swap (src_img, src_bpp * 8);
+    image_endian_swap (dst_img, dst_bpp * 8);
+
+    pixman_transform_init_identity (&transform);
+    
+    if (lcg_rand_n (8) > 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);
+    }
+
+    if (lcg_rand_n (4) > 0)
+    {
+       int c = lcg_rand_N (2 * 65536) - 65536;
+       int s = lcg_rand_N (2 * 65536) - 65536;
+       
+       pixman_transform_rotate (&transform, NULL, c, s);
+    }
+
+    pixman_image_set_transform (src_img, &transform);
+    
+    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 (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 (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);
+    }
+
+    pixman_image_composite (op, src_img, NULL, dst_img,
+                            src_x, src_y, 0, 0, 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, dst_bpp * 8);
+
+    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 (dst_img);
+
+    crc32 = compute_crc32 (0, dstbuf, dst_stride * dst_height);
+    free (srcbuf);
+    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 ("affine", 8000000, 0x46EC3C6A,
+                            test_composite, argc, argv);
+}