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Diffstat (limited to 'pixman/test/scaling-test.c')
| -rw-r--r-- | pixman/test/scaling-test.c | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/pixman/test/scaling-test.c b/pixman/test/scaling-test.c new file mode 100644 index 000000000..8899c594f --- /dev/null +++ b/pixman/test/scaling-test.c @@ -0,0 +1,474 @@ +/* + * Test program, which can detect problems with nearest neighbout scaling + * implementation. Also SRC and OVER opetations tested for 16bpp and 32bpp + * images. + * + * Just run it without any command line arguments, and it will report either + * "scaling test passed" - everything is ok + * "scaling test failed!" - there is some problem + * + * In the case of failure, finding the problem involves the following steps: + * 1. Get the reference 'scaling-test' binary. It makes sense to disable all + * the cpu specific optimizations in pixman and also configure it with + * '--disable-shared' option. Those who are paranoid can also tweak the + * sources to disable all fastpath functions. The resulting binary + * can be renamed to something like 'scaling-test.ref'. + * 2. Compile the buggy binary (also with the '--disable-shared' option). + * 3. Run 'ruby scaling-test-bisect.rb ./scaling-test.ref ./scaling-test' + * 4. Look at the information about failed case (destination buffer content + * will be shown) and try to figure out what is wrong. It is possible + * to use debugging print to stderr in pixman to get more information, + * this does not interfere with the testing script. + */ +#include <assert.h> +#include <stdlib.h> +#include <stdio.h> +#include "pixman.h" + +/* A primitive pseudorandom number generator, taken from POSIX.1-2001 example */ + +static uint32_t lcg_seed; + +uint32_t +lcg_rand (void) +{ + lcg_seed = lcg_seed * 1103515245 + 12345; + return ((uint32_t)(lcg_seed / 65536) % 32768); +} + +void +lcg_srand (uint32_t seed) +{ + lcg_seed = seed; +} + +uint32_t +lcg_rand_n (int max) +{ + return lcg_rand () % max; +} + +/*----------------------------------------------------------------------------*\ +* CRC-32 version 2.0.0 by Craig Bruce, 2006-04-29. +* +* This program generates the CRC-32 values for the files named in the +* command-line arguments. These are the same CRC-32 values used by GZIP, +* PKZIP, and ZMODEM. The compute_crc32() can also be detached and +* used independently. +* +* THIS PROGRAM IS PUBLIC-DOMAIN SOFTWARE. +* +* Based on the byte-oriented implementation "File Verification Using CRC" +* by Mark R. Nelson in Dr. Dobb's Journal, May 1992, pp. 64-67. +* +* v1.0.0: original release. +* v1.0.1: fixed printf formats. +* v1.0.2: fixed something else. +* v1.0.3: replaced CRC constant table by generator function. +* v1.0.4: reformatted code, made ANSI C. 1994-12-05. +* v2.0.0: rewrote to use memory buffer & static table, 2006-04-29. +\*----------------------------------------------------------------------------*/ + +/*----------------------------------------------------------------------------*\ +* NAME: +* compute_crc32() - computes the CRC-32 value of a memory buffer +* DESCRIPTION: +* Computes or accumulates the CRC-32 value for a memory buffer. +* The 'in_crc32' gives a previously accumulated CRC-32 value to allow +* a CRC to be generated for multiple sequential buffer-fuls of data. +* The 'in_crc32' for the first buffer must be zero. +* ARGUMENTS: +* in_crc32 - accumulated CRC-32 value, must be 0 on first call +* buf - buffer to compute CRC-32 value for +* buf_len - number of bytes in buffer +* RETURNS: +* crc32 - computed CRC-32 value +* ERRORS: +* (no errors are possible) +\*----------------------------------------------------------------------------*/ + +static uint32_t +compute_crc32 (uint32_t in_crc32, + const void *buf, + size_t buf_len) +{ + static const uint32_t crc_table[256] = { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, + 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, + 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, + 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, + 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, + 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, + 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, + 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, + 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, + 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, + 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, + 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, + 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, + 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, + 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, + 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, + 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, + 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, + 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, + 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, + 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, + 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, + 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, + 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, + 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, + 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, + 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, + 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, + 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, + 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, + 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, + 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, + 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D + }; + + uint32_t crc32; + unsigned char * byte_buf; + size_t i; + + /** accumulate crc32 for buffer **/ + crc32 = in_crc32 ^ 0xFFFFFFFF; + byte_buf = (unsigned char*) buf; + + for (i = 0; i < buf_len; i++) + crc32 = (crc32 >> 8) ^ crc_table[(crc32 ^ byte_buf[i]) & 0xFF]; + + return (crc32 ^ 0xFFFFFFFF); +} + +/* perform endian conversion of pixel data */ +static void +image_endian_swap (pixman_image_t *img, + int bpp) +{ + int stride = pixman_image_get_stride (img); + uint32_t *data = pixman_image_get_data (img); + int height = pixman_image_get_height (img); + int i, j; + + /* swap bytes only on big endian systems */ + volatile uint16_t endian_check_var = 0x1234; + if (*(volatile uint8_t *)&endian_check_var != 0x12) + return; + + for (i = 0; i < height; i++) + { + char *line_data = (char *)data + stride * i; + + /* swap bytes only for 16, 24 and 32 bpp for now */ + switch (bpp) + { + case 16: + for (j = 0; j + 2 <= stride; j += 2) + { + char t1 = line_data[j + 0]; + char t2 = line_data[j + 1]; + line_data[j + 1] = t1; + line_data[j + 0] = t2; + } + break; + + case 24: + for (j = 0; j + 3 <= stride; j += 3) + { + char t1 = line_data[j + 0]; + char t2 = line_data[j + 1]; + char t3 = line_data[j + 2]; + line_data[j + 2] = t1; + line_data[j + 1] = t2; + line_data[j + 0] = t3; + } + break; + + case 32: + for (j = 0; j + 4 <= stride; j += 4) + { + char t1 = line_data[j + 0]; + char t2 = line_data[j + 1]; + char t3 = line_data[j + 2]; + char t4 = line_data[j + 3]; + line_data[j + 3] = t1; + line_data[j + 2] = t2; + line_data[j + 1] = t3; + line_data[j + 0] = t4; + } + break; + + default: + break; + } + } +} + +#define MAX_SRC_WIDTH 10 +#define MAX_SRC_HEIGHT 10 +#define MAX_DST_WIDTH 10 +#define MAX_DST_HEIGHT 10 +#define MAX_STRIDE 4 + +/* + * Composite operation with pseudorandom images + */ +uint32_t +test_composite (uint32_t initcrc, + 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; + int scale_x = 32768, scale_y = 32768; + int op; + int repeat = 0; + int src_fmt, dst_fmt; + uint32_t * srcbuf; + uint32_t * dstbuf; + uint32_t crc32; + + lcg_srand (testnum); + + src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4; + dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4; + op = (lcg_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER; + + src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1; + src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1; + dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1; + dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1; + src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp; + dst_stride = dst_width * dst_bpp + lcg_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) + lcg_rand_n (src_width * 3 / 2); + src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2); + dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2); + dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2); + w = lcg_rand_n (dst_width * 3 / 2 - dst_x); + h = lcg_rand_n (dst_height * 3 / 2 - dst_y); + + srcbuf = (uint32_t *)malloc (src_stride * src_height); + dstbuf = (uint32_t *)malloc (dst_stride * dst_height); + + for (i = 0; i < src_stride * src_height; i++) + *((uint8_t *)srcbuf + i) = lcg_rand_n (256); + + for (i = 0; i < dst_stride * dst_height; i++) + *((uint8_t *)dstbuf + i) = lcg_rand_n (256); + + src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ? + PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5; + + dst_fmt = dst_bpp == 4 ? (lcg_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, src_bpp * 8); + image_endian_swap (dst_img, dst_bpp * 8); + + if (lcg_rand_n (8) > 0) + { + scale_x = 32768 + lcg_rand_n (65536); + scale_y = 32768 + lcg_rand_n (65536); + pixman_transform_init_scale (&transform, scale_x, scale_y); + pixman_image_set_transform (src_img, &transform); + } + + switch (lcg_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; + } + pixman_image_set_repeat (src_img, repeat); + + if (verbose) + { + printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt); + printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n", + op, scale_x, scale_y, repeat); + 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 (lcg_rand_n (8) == 0) + { + pixman_box16_t clip_boxes[2]; + int n = lcg_rand_n (2) + 1; + + for (i = 0; i < n; i++) + { + clip_boxes[i].x1 = lcg_rand_n (src_width); + clip_boxes[i].y1 = lcg_rand_n (src_height); + clip_boxes[i].x2 = + clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1); + clip_boxes[i].y2 = + clip_boxes[i].y1 + lcg_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 (lcg_rand_n (8) == 0) + { + pixman_box16_t clip_boxes[2]; + int n = lcg_rand_n (2) + 1; + for (i = 0; i < n; i++) + { + clip_boxes[i].x1 = lcg_rand_n (dst_width); + clip_boxes[i].y1 = lcg_rand_n (dst_height); + clip_boxes[i].x2 = + clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1); + clip_boxes[i].y2 = + clip_boxes[i].y1 + lcg_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); + + if (dst_fmt == PIXMAN_x8r8g8b8) + { + /* ignore unused part */ + for (i = 0; i < dst_stride * dst_height / 4; i++) + dstbuf[i] &= 0xFFFFFF; + } + + image_endian_swap (dst_img, dst_bpp * 8); + + if (verbose) + { + int j; + + for (i = 0; i < dst_height; i++) + { + for (j = 0; j < dst_stride; j++) + printf ("%02X ", *((uint8_t *)dstbuf + i * dst_stride + j)); + + printf ("\n"); + } + } + + pixman_image_unref (src_img); + pixman_image_unref (dst_img); + + crc32 = compute_crc32 (initcrc, dstbuf, dst_stride * dst_height); + free (srcbuf); + free (dstbuf); + return crc32; +} + +int +main (int argc, char *argv[]) +{ + int i, n = 0; + uint32_t crc = 0; + + pixman_disable_out_of_bounds_workaround (); + + if (argc >= 2) + n = atoi (argv[1]); + + if (n == 0) n = 3000000; + + if (n < 0) + { + crc = test_composite (0, -n, 1); + printf ("crc32=%08X\n", crc); + } + else + { + for (i = 1; i <= n; i++) + crc = test_composite (crc, i, 0); + + printf ("crc32=%08X\n", crc); + + if (n == 3000000) + { + /* predefined value for running with all the fastpath functions disabled */ + /* it needs to be updated every time changes are introduced to this program! */ + + if (crc == 0x0B633CF4) + { + printf ("scaling test passed\n"); + } + else + { + printf ("scaling test failed!\n"); + return 1; + } + } + } + + return 0; +} |