aboutsummaryrefslogtreecommitdiff
path: root/pixman/test/scaling-crash-test.c
blob: 0dac892b5a7e39a29dc589fc05a1ba52acf07345 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
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;
}