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https://salsa.debian.org/xorg-team/lib/pixman
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9fe7d32c4b
This tests what happens if you attempt to make an image with an alpha map that has the image as its alpha map. This results in an infinite loop in _pixman_image_validate(), so the test sets up a SIGALRM to exit if it runs for more than five seconds.
30 lines
944 B
C
30 lines
944 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include "utils.h"
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#define WIDTH 400
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#define HEIGHT 200
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int
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main (int argc, char **argv)
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{
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uint8_t *alpha = make_random_bytes (WIDTH * HEIGHT);
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uint32_t *src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
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uint32_t *dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
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pixman_image_t *a = pixman_image_create_bits (PIXMAN_a8, WIDTH, HEIGHT, (uint32_t *)alpha, WIDTH);
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pixman_image_t *d = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
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pixman_image_t *s = pixman_image_create_bits (PIXMAN_a2r10g10b10, WIDTH, HEIGHT, src, WIDTH * 4);
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fail_after (5, "Infinite loop detected: 5 seconds without progress\n");
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pixman_image_set_alpha_map (s, a, 0, 0);
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pixman_image_set_alpha_map (a, s, 0, 0);
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pixman_image_composite (PIXMAN_OP_SRC, s, NULL, d, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
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pixman_image_unref (s);
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return 0;
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}
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