add pixman and libpngraylib

1 files changed, 324 insertions, 0 deletions

diff --git a/libs/pixman-0.40.0/test/affine-test.c b/libs/pixman-0.40.0/test/affine-test.c
new file mode 100644
index 0000000..f516856
--- /dev/null
+++ b/libs/pixman-0.40.0/test/affine-test.c
@@ -0,0 +1,324 @@
+/*
+ * 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;
+    pixman_op_t        op;
+    pixman_repeat_t    repeat = PIXMAN_REPEAT_NONE;
+    pixman_format_code_t src_fmt, dst_fmt;
+    uint32_t *         srcbuf;
+    uint32_t *         dstbuf;
+    uint32_t           crc32;
+    FLOAT_REGS_CORRUPTION_DETECTOR_START ();
+
+    prng_srand (testnum);
+
+    src_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+    dst_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+    op = (prng_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
+
+    src_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+    src_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
+    dst_width = prng_rand_n (MAX_DST_WIDTH) + 1;
+    dst_height = prng_rand_n (MAX_DST_HEIGHT) + 1;
+    src_stride = src_width * src_bpp + prng_rand_n (MAX_STRIDE) * src_bpp;
+    dst_stride = dst_width * dst_bpp + prng_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) + prng_rand_n (src_width * 3 / 2);
+    src_y = -(src_height / 4) + prng_rand_n (src_height * 3 / 2);
+    dst_x = -(dst_width / 4) + prng_rand_n (dst_width * 3 / 2);
+    dst_y = -(dst_height / 4) + prng_rand_n (dst_height * 3 / 2);
+    w = prng_rand_n (dst_width * 3 / 2 - dst_x);
+    h = prng_rand_n (dst_height * 3 / 2 - dst_y);
+
+    srcbuf = (uint32_t *)malloc (src_stride * src_height);
+    dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
+
+    prng_randmemset (srcbuf, src_stride * src_height, 0);
+    prng_randmemset (dstbuf, dst_stride * dst_height, 0);
+
+    if (prng_rand_n (2) == 0)
+    {
+	srcbuf += (src_stride / 4) * (src_height - 1);
+	src_stride = - src_stride;
+    }
+
+    if (prng_rand_n (2) == 0)
+    {
+	dstbuf += (dst_stride / 4) * (dst_height - 1);
+	dst_stride = - dst_stride;
+    }
+    
+    src_fmt = src_bpp == 4 ? (prng_rand_n (2) == 0 ?
+                              PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
+
+    dst_fmt = dst_bpp == 4 ? (prng_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);
+    image_endian_swap (dst_img);
+
+    pixman_transform_init_identity (&transform);
+
+    if (prng_rand_n (3) > 0)
+    {
+	scale_x = -65536 * 3 + prng_rand_n (65536 * 6);
+	if (prng_rand_n (2))
+	    scale_y = -65536 * 3 + prng_rand_n (65536 * 6);
+	else
+	    scale_y = scale_x;
+	pixman_transform_init_scale (&transform, scale_x, scale_y);
+    }
+    if (prng_rand_n (3) > 0)
+    {
+	translate_x = -65536 * 3 + prng_rand_n (6 * 65536);
+	if (prng_rand_n (2))
+	    translate_y = -65536 * 3 + prng_rand_n (6 * 65536);
+	else
+	    translate_y = translate_x;
+	pixman_transform_translate (&transform, NULL, translate_x, translate_y);
+    }
+
+    if (prng_rand_n (4) > 0)
+    {
+	int c, s, tx = 0, ty = 0;
+	switch (prng_rand_n (4))
+	{
+	case 0:
+	    /* 90 degrees */
+	    c = 0;
+	    s = pixman_fixed_1;
+	    tx = pixman_int_to_fixed (MAX_SRC_HEIGHT);
+	    break;
+	case 1:
+	    /* 180 degrees */
+	    c = -pixman_fixed_1;
+	    s = 0;
+	    tx = pixman_int_to_fixed (MAX_SRC_WIDTH);
+	    ty = pixman_int_to_fixed (MAX_SRC_HEIGHT);
+	    break;
+	case 2:
+	    /* 270 degrees */
+	    c = 0;
+	    s = -pixman_fixed_1;
+	    ty = pixman_int_to_fixed (MAX_SRC_WIDTH);
+	    break;
+	default:
+	    /* arbitrary rotation */
+	    c = prng_rand_n (2 * 65536) - 65536;
+	    s = prng_rand_n (2 * 65536) - 65536;
+	    break;
+	}
+	pixman_transform_rotate (&transform, NULL, c, s);
+	pixman_transform_translate (&transform, NULL, tx, ty);
+    }
+
+    if (prng_rand_n (8) == 0)
+    {
+	/* Flip random bits */
+	int maxflipcount = 8;
+	while (maxflipcount--)
+	{
+	    int i = prng_rand_n (2);
+	    int j = prng_rand_n (3);
+	    int bitnum = prng_rand_n (32);
+	    transform.matrix[i][j] ^= 1U << bitnum;
+	    if (prng_rand_n (2))
+		break;
+	}
+    }
+
+    pixman_image_set_transform (src_img, &transform);
+
+    switch (prng_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 (prng_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)
+    {
+#define M(r,c)								\
+	transform.matrix[r][c]
+
+	printf ("src_fmt=%s, dst_fmt=%s\n", format_name (src_fmt), format_name (dst_fmt));
+	printf ("op=%s, repeat=%d, transform=\n",
+	        operator_name (op), repeat);
+	printf (" { { { 0x%08x, 0x%08x, 0x%08x },\n"
+		"     { 0x%08x, 0x%08x, 0x%08x },\n"
+		"     { 0x%08x, 0x%08x, 0x%08x },\n"
+		" } };\n",
+		M(0,0), M(0,1), M(0,2),
+		M(1,0), M(1,1), M(1,2),
+		M(2,0), M(2,1), M(2,2));
+	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 (prng_rand_n (8) == 0)
+    {
+	pixman_box16_t clip_boxes[2];
+	int            n = prng_rand_n (2) + 1;
+
+	for (i = 0; i < n; i++)
+	{
+	    clip_boxes[i].x1 = prng_rand_n (src_width);
+	    clip_boxes[i].y1 = prng_rand_n (src_height);
+	    clip_boxes[i].x2 =
+		clip_boxes[i].x1 + prng_rand_n (src_width - clip_boxes[i].x1);
+	    clip_boxes[i].y2 =
+		clip_boxes[i].y1 + prng_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 (prng_rand_n (8) == 0)
+    {
+	pixman_box16_t clip_boxes[2];
+	int            n = prng_rand_n (2) + 1;
+	for (i = 0; i < n; i++)
+	{
+	    clip_boxes[i].x1 = prng_rand_n (dst_width);
+	    clip_boxes[i].y1 = prng_rand_n (dst_height);
+	    clip_boxes[i].x2 =
+		clip_boxes[i].x1 + prng_rand_n (dst_width - clip_boxes[i].x1);
+	    clip_boxes[i].y2 =
+		clip_boxes[i].y1 + prng_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);
+
+    crc32 = compute_crc32_for_image (0, dst_img);
+    
+    if (verbose)
+	print_image (dst_img);
+
+    pixman_image_unref (src_img);
+    pixman_image_unref (dst_img);
+
+    if (src_stride < 0)
+	srcbuf += (src_stride / 4) * (src_height - 1);
+
+    if (dst_stride < 0)
+	dstbuf += (dst_stride / 4) * (dst_height - 1);
+    
+    free (srcbuf);
+    free (dstbuf);
+
+    FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();
+    return crc32;
+}
+
+#if BILINEAR_INTERPOLATION_BITS == 7
+#define CHECKSUM 0xBE724CFE
+#elif BILINEAR_INTERPOLATION_BITS == 4
+#define CHECKSUM 0x79BBE501
+#else
+#define CHECKSUM 0x00000000
+#endif
+
+int
+main (int argc, const char *argv[])
+{
+    pixman_disable_out_of_bounds_workaround ();
+
+    return fuzzer_test_main ("affine", 8000000, CHECKSUM,
+			     test_composite, argc, argv);
+}