add pixman and libpngraylib

1 files changed, 219 insertions, 0 deletions

diff --git a/libs/pixman-0.40.0/test/scaling-crash-test.c b/libs/pixman-0.40.0/test/scaling-crash-test.c
new file mode 100644
index 0000000..0dac892
--- /dev/null
+++ b/libs/pixman-0.40.0/test/scaling-crash-test.c
@@ -0,0 +1,219 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "utils.h"
+
+/*
+ * We have a source image filled with solid color, set NORMAL or PAD repeat,
+ * and some transform which results in nearest neighbour scaling.
+ *
+ * The expected result is either that the destination image filled with this solid
+ * color or, if the transformation is such that we can't composite anything at
+ * all, that nothing has changed in the destination.
+ *
+ * The surrounding memory of the source image is a different solid color so that
+ * we are sure to get failures if we access it.
+ */
+static int
+run_test (int32_t		dst_width,
+	  int32_t		dst_height,
+	  int32_t		src_width,
+	  int32_t		src_height,
+	  int32_t		src_x,
+	  int32_t		src_y,
+	  int32_t		scale_x,
+	  int32_t		scale_y,
+	  pixman_filter_t	filter,
+	  pixman_repeat_t	repeat)
+{
+    pixman_image_t *   src_img;
+    pixman_image_t *   dst_img;
+    pixman_transform_t transform;
+    uint32_t *         srcbuf;
+    uint32_t *         dstbuf;
+    pixman_color_t     color_cc = { 0xcccc, 0xcccc, 0xcccc, 0xcccc };
+    pixman_image_t *   solid;
+    int result;
+    int i;
+
+    static const pixman_fixed_t kernel[] =
+    {
+#define D(f)	(pixman_double_to_fixed (f) + 0x0001)
+
+	pixman_int_to_fixed (5),
+	pixman_int_to_fixed (5),
+	D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0),
+	D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0),
+	D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0),
+	D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0),
+	D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0), D(1/25.0)
+    };
+
+    result = 0;
+
+    srcbuf = (uint32_t *)malloc ((src_width + 10) * (src_height + 10) * 4);
+    dstbuf = (uint32_t *)malloc (dst_width * dst_height * 4);
+
+    memset (srcbuf, 0x88, src_width * src_height * 4);
+    memset (dstbuf, 0x33, dst_width * dst_height * 4);
+
+    src_img = pixman_image_create_bits (
+        PIXMAN_a8r8g8b8, src_width, src_height,
+	srcbuf + (src_width + 10) * 5 + 5, (src_width + 10) * 4);
+
+    solid = pixman_image_create_solid_fill (&color_cc);
+    pixman_image_composite32 (PIXMAN_OP_SRC, solid, NULL, src_img,
+			      0, 0, 0, 0, 0, 0, src_width, src_height);
+    pixman_image_unref (solid);
+
+    dst_img = pixman_image_create_bits (
+        PIXMAN_a8r8g8b8, dst_width, dst_height, dstbuf, dst_width * 4);
+
+    pixman_transform_init_scale (&transform, scale_x, scale_y);
+    pixman_image_set_transform (src_img, &transform);
+    pixman_image_set_repeat (src_img, repeat);
+    if (filter == PIXMAN_FILTER_CONVOLUTION)
+	pixman_image_set_filter (src_img, filter, kernel, 27);
+    else
+	pixman_image_set_filter (src_img, filter, NULL, 0);
+
+    pixman_image_composite (PIXMAN_OP_SRC, src_img, NULL, dst_img,
+                            src_x, src_y, 0, 0, 0, 0, dst_width, dst_height);
+
+    pixman_image_unref (src_img);
+    pixman_image_unref (dst_img);
+
+    for (i = 0; i < dst_width * dst_height; i++)
+    {
+	if (dstbuf[i] != 0xCCCCCCCC && dstbuf[i] != 0x33333333)
+	{
+	    result = 1;
+	    break;
+	}
+    }
+
+    free (srcbuf);
+    free (dstbuf);
+    return result;
+}
+
+typedef struct filter_info_t filter_info_t;
+struct filter_info_t
+{
+    pixman_filter_t value;
+    char name[28];
+};
+
+static const filter_info_t filters[] =
+{
+    { PIXMAN_FILTER_NEAREST, "NEAREST" },
+    { PIXMAN_FILTER_BILINEAR, "BILINEAR" },
+    { PIXMAN_FILTER_CONVOLUTION, "CONVOLUTION" },
+};
+
+typedef struct repeat_info_t repeat_info_t;
+struct repeat_info_t
+{
+    pixman_repeat_t value;
+    char name[28];
+};
+
+
+static const repeat_info_t repeats[] =
+{
+    { PIXMAN_REPEAT_PAD, "PAD" },
+    { PIXMAN_REPEAT_REFLECT, "REFLECT" },
+    { PIXMAN_REPEAT_NORMAL, "NORMAL" }
+};
+
+static int
+do_test (int32_t		dst_size,
+	 int32_t		src_size,
+	 int32_t		src_offs,
+	 int32_t		scale_factor)
+{
+    int i, j;
+
+    for (i = 0; i < ARRAY_LENGTH (filters); ++i)
+    {
+	for (j = 0; j < ARRAY_LENGTH (repeats); ++j)
+	{
+	    /* horizontal test */
+	    if (run_test (dst_size, 1,
+			  src_size, 1,
+			  src_offs, 0,
+			  scale_factor, 65536,
+			  filters[i].value,
+			  repeats[j].value) != 0)
+	    {
+		printf ("Vertical test failed with %s filter and repeat mode %s\n",
+			filters[i].name, repeats[j].name);
+
+		return 1;
+	    }
+
+	    /* vertical test */
+	    if (run_test (1, dst_size,
+			  1, src_size,
+			  0, src_offs,
+			  65536, scale_factor,
+			  filters[i].value,
+			  repeats[j].value) != 0)
+	    {
+		printf ("Vertical test failed with %s filter and repeat mode %s\n",
+			filters[i].name, repeats[j].name);
+
+		return 1;
+	    }
+	}
+    }
+
+    return 0;
+}
+
+int
+main (int argc, char *argv[])
+{
+    int i;
+
+    pixman_disable_out_of_bounds_workaround ();
+
+    /* can potentially crash */
+    assert (do_test (
+		48000, 32767, 1, 65536 * 128) == 0);
+
+    /* can potentially get into a deadloop */
+    assert (do_test (
+		16384, 65536, 32, 32768) == 0);
+
+    /* can potentially access memory outside source image buffer */
+    assert (do_test (
+		10, 10, 0, 1) == 0);
+    assert (do_test (
+		10, 10, 0, 0) == 0);
+
+    for (i = 0; i < 100; ++i)
+    {
+	pixman_fixed_t one_seventh =
+	    (((pixman_fixed_48_16_t)pixman_fixed_1) << 16) / (7 << 16);
+
+	assert (do_test (
+		    1, 7, 3, one_seventh + i - 50) == 0);
+    }
+
+    for (i = 0; i < 100; ++i)
+    {
+	pixman_fixed_t scale =
+	    (((pixman_fixed_48_16_t)pixman_fixed_1) << 16) / (32767 << 16);
+
+	assert (do_test (
+		    1, 32767, 16383, scale + i - 50) == 0);
+    }
+
+    /* can potentially provide invalid results (out of range matrix stuff) */
+    assert (do_test (
+	48000, 32767, 16384, 65536 * 128) == 0);
+
+    return 0;
+}