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Diffstat (limited to 'src/pixman/test/scaling-crash-test.c')
| -rw-r--r-- | src/pixman/test/scaling-crash-test.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/pixman/test/scaling-crash-test.c b/src/pixman/test/scaling-crash-test.c new file mode 100644 index 0000000..0dac892 --- /dev/null +++ b/src/pixman/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; +} |
