switch to tinyobj and nanovg from assimp and cairo

1 files changed, 0 insertions, 2288 deletions

diff --git a/libs/pixman-0.40.0/test/utils.c b/libs/pixman-0.40.0/test/utils.c
deleted file mode 100644
index cd9ab26..0000000
--- a/libs/pixman-0.40.0/test/utils.c
+++ /dev/null
@@ -1,2288 +0,0 @@
-#define _GNU_SOURCE
-
-#include "utils.h"
-#include <math.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <float.h>
-#include <ctype.h>
-#include <limits.h>
-
-#ifdef HAVE_GETTIMEOFDAY
-#include <sys/time.h>
-#else
-#include <time.h>
-#endif
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifdef HAVE_SYS_MMAN_H
-#include <sys/mman.h>
-#endif
-
-#ifdef HAVE_FENV_H
-#include <fenv.h>
-#endif
-
-#ifdef HAVE_LIBPNG
-#include <png.h>
-#endif
-
-#define ROUND_UP(x, mult) (((x) + (mult) - 1) / (mult) * (mult))
-
-/* Random number generator state
- */
-
-prng_t prng_state_data;
-prng_t *prng_state;
-
-/*----------------------------------------------------------------------------*\
- *  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 Crc32_ComputeBuf () 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:
- *     Crc32_ComputeBuf () - computes the CRC-32 value of a memory buffer
- *  DESCRIPTION:
- *     Computes or accumulates the CRC-32 value for a memory buffer.
- *     The 'inCrc32' gives a previously accumulated CRC-32 value to allow
- *     a CRC to be generated for multiple sequential buffer-fuls of data.
- *     The 'inCrc32' for the first buffer must be zero.
- *  ARGUMENTS:
- *     inCrc32 - accumulated CRC-32 value, must be 0 on first call
- *     buf     - buffer to compute CRC-32 value for
- *     bufLen  - number of bytes in buffer
- *  RETURNS:
- *     crc32 - computed CRC-32 value
- *  ERRORS:
- *     (no errors are possible)
-\*----------------------------------------------------------------------------*/
-
-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);
-}
-
-static uint32_t
-compute_crc32_for_image_internal (uint32_t        crc32,
-				  pixman_image_t *img,
-				  pixman_bool_t	  remove_alpha,
-				  pixman_bool_t	  remove_rgb)
-{
-    pixman_format_code_t fmt = pixman_image_get_format (img);
-    uint32_t *data = pixman_image_get_data (img);
-    int stride = pixman_image_get_stride (img);
-    int height = pixman_image_get_height (img);
-    uint32_t mask = 0xffffffff;
-    int i;
-
-    if (stride < 0)
-    {
-	data += (stride / 4) * (height - 1);
-	stride = - stride;
-    }
-
-    /* mask unused 'x' part */
-    if (PIXMAN_FORMAT_BPP (fmt) - PIXMAN_FORMAT_DEPTH (fmt) &&
-	PIXMAN_FORMAT_DEPTH (fmt) != 0)
-    {
-	uint32_t m = (1 << PIXMAN_FORMAT_DEPTH (fmt)) - 1;
-
-	if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA ||
-	    PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA)
-	{
-	    m <<= (PIXMAN_FORMAT_BPP (fmt) - PIXMAN_FORMAT_DEPTH (fmt));
-	}
-
-	mask &= m;
-    }
-
-    /* mask alpha channel */
-    if (remove_alpha && PIXMAN_FORMAT_A (fmt))
-    {
-	uint32_t m;
-
-	if (PIXMAN_FORMAT_BPP (fmt) == 32)
-	    m = 0xffffffff;
-	else
-	    m = (1 << PIXMAN_FORMAT_BPP (fmt)) - 1;
-
-	m >>= PIXMAN_FORMAT_A (fmt);
-
-	if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA ||
-	    PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA ||
-	    PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_A)
-	{
-	    /* Alpha is at the bottom of the pixel */
-	    m <<= PIXMAN_FORMAT_A (fmt);
-	}
-
-	mask &= m;
-    }
-
-    /* mask rgb channels */
-    if (remove_rgb && PIXMAN_FORMAT_RGB (fmt))
-    {
-	uint32_t m = ((uint32_t)~0) >> (32 - PIXMAN_FORMAT_BPP (fmt));
-	uint32_t size = PIXMAN_FORMAT_R (fmt) + PIXMAN_FORMAT_G (fmt) + PIXMAN_FORMAT_B (fmt);
-
-	m &= ~((1 << size) - 1);
-
-	if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA ||
-	    PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA)
-	{
-	    /* RGB channels are at the top of the pixel */
-	    m >>= size;
-	}
-
-	mask &= m;
-    }
-
-    for (i = 0; i * PIXMAN_FORMAT_BPP (fmt) < 32; i++)
-	mask |= mask << (i * PIXMAN_FORMAT_BPP (fmt));
-
-    for (i = 0; i < stride * height / 4; i++)
-	data[i] &= mask;
-
-    /* swap endiannes in order to provide identical results on both big
-     * and litte endian systems
-     */
-    image_endian_swap (img);
-
-    return compute_crc32 (crc32, data, stride * height);
-}
-
-uint32_t
-compute_crc32_for_image (uint32_t        crc32,
-			 pixman_image_t *img)
-{
-    if (img->common.alpha_map)
-    {
-	crc32 = compute_crc32_for_image_internal (crc32, img, TRUE, FALSE);
-	crc32 = compute_crc32_for_image_internal (
-	    crc32, (pixman_image_t *)img->common.alpha_map, FALSE, TRUE);
-    }
-    else
-    {
-	crc32 = compute_crc32_for_image_internal (crc32, img, FALSE, FALSE);
-    }
-
-    return crc32;
-}
-
-void
-print_image (pixman_image_t *image)
-{
-    int i, j;
-    int width, height, stride;
-    pixman_format_code_t format;
-    uint8_t *buffer;
-    int s;
-
-    width = pixman_image_get_width (image);
-    height = pixman_image_get_height (image);
-    stride = pixman_image_get_stride (image);
-    format = pixman_image_get_format (image);
-    buffer = (uint8_t *)pixman_image_get_data (image);
-
-    s = (stride >= 0)? stride : - stride;
-    
-    printf ("---\n");
-    for (i = 0; i < height; i++)
-    {
-	for (j = 0; j < s; j++)
-	{
-	    if (j == (width * PIXMAN_FORMAT_BPP (format) + 7) / 8)
-		printf ("| ");
-
-	    printf ("%02X ", *((uint8_t *)buffer + i * stride + j));
-	}
-	printf ("\n");
-    }
-    printf ("---\n");
-}
-
-/* perform endian conversion of pixel data
- */
-void
-image_endian_swap (pixman_image_t *img)
-{
-    int stride = pixman_image_get_stride (img);
-    uint32_t *data = pixman_image_get_data (img);
-    int height = pixman_image_get_height (img);
-    int bpp = PIXMAN_FORMAT_BPP (pixman_image_get_format (img));
-    int i, j;
-
-    /* swap bytes only on big endian systems */
-    if (is_little_endian())
-	return;
-
-    if (bpp == 8)
-	return;
-
-    for (i = 0; i < height; i++)
-    {
-	uint8_t *line_data = (uint8_t *)data + stride * i;
-	int s = (stride >= 0)? stride : - stride;
-    	
-	switch (bpp)
-	{
-	case 1:
-	    for (j = 0; j < s; j++)
-	    {
-		line_data[j] =
-		    ((line_data[j] & 0x80) >> 7) |
-		    ((line_data[j] & 0x40) >> 5) |
-		    ((line_data[j] & 0x20) >> 3) |
-		    ((line_data[j] & 0x10) >> 1) |
-		    ((line_data[j] & 0x08) << 1) |
-		    ((line_data[j] & 0x04) << 3) |
-		    ((line_data[j] & 0x02) << 5) |
-		    ((line_data[j] & 0x01) << 7);
-	    }
-	    break;
-	case 4:
-	    for (j = 0; j < s; j++)
-	    {
-		line_data[j] = (line_data[j] >> 4) | (line_data[j] << 4);
-	    }
-	    break;
-	case 16:
-	    for (j = 0; j + 2 <= s; 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 <= s; 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 <= s; 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:
-	    assert (FALSE);
-	    break;
-	}
-    }
-}
-
-#define N_LEADING_PROTECTED	10
-#define N_TRAILING_PROTECTED	10
-
-typedef struct
-{
-    void *addr;
-    uint32_t len;
-    uint8_t *trailing;
-    int n_bytes;
-} info_t;
-
-#if FENCE_MALLOC_ACTIVE
-
-unsigned long
-fence_get_page_size ()
-{
-    /* You can fake a page size here, if you want to test e.g. 64 kB
-     * pages on a 4 kB page system. Just put a multiplier below.
-     */
-    return getpagesize ();
-}
-
-/* This is apparently necessary on at least OS X */
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-
-void *
-fence_malloc (int64_t len)
-{
-    unsigned long page_size = fence_get_page_size ();
-    unsigned long page_mask = page_size - 1;
-    uint32_t n_payload_bytes = (len + page_mask) & ~page_mask;
-    uint32_t n_bytes =
-	(page_size * (N_LEADING_PROTECTED + N_TRAILING_PROTECTED + 2) +
-	 n_payload_bytes) & ~page_mask;
-    uint8_t *initial_page;
-    uint8_t *leading_protected;
-    uint8_t *trailing_protected;
-    uint8_t *payload;
-    uint8_t *addr;
-
-    if (len < 0)
-	abort();
-    
-    addr = mmap (NULL, n_bytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
-		 -1, 0);
-
-    if (addr == MAP_FAILED)
-    {
-	printf ("mmap failed on %lld %u\n", (long long int)len, n_bytes);
-	return NULL;
-    }
-
-    initial_page = (uint8_t *)(((uintptr_t)addr + page_mask) & ~page_mask);
-    leading_protected = initial_page + page_size;
-    payload = leading_protected + N_LEADING_PROTECTED * page_size;
-    trailing_protected = payload + n_payload_bytes;
-
-    ((info_t *)initial_page)->addr = addr;
-    ((info_t *)initial_page)->len = len;
-    ((info_t *)initial_page)->trailing = trailing_protected;
-    ((info_t *)initial_page)->n_bytes = n_bytes;
-
-    if ((mprotect (leading_protected, N_LEADING_PROTECTED * page_size,
-		  PROT_NONE) == -1) ||
-	(mprotect (trailing_protected, N_TRAILING_PROTECTED * page_size,
-		  PROT_NONE) == -1))
-    {
-	munmap (addr, n_bytes);
-	return NULL;
-    }
-
-    return payload;
-}
-
-void
-fence_free (void *data)
-{
-    uint32_t page_size = fence_get_page_size ();
-    uint8_t *payload = data;
-    uint8_t *leading_protected = payload - N_LEADING_PROTECTED * page_size;
-    uint8_t *initial_page = leading_protected - page_size;
-    info_t *info = (info_t *)initial_page;
-
-    munmap (info->addr, info->n_bytes);
-}
-
-static void
-fence_image_destroy (pixman_image_t *image, void *data)
-{
-    fence_free (data);
-}
-
-/* Create an image with fence pages.
- *
- * Creates an image, where the data area is allocated with fence_malloc ().
- * Each row has an additional page in the stride.
- *
- * min_width is only a minimum width for the image. The width is aligned up
- * for the row size to be divisible by both page size and pixel size.
- *
- * If stride_fence is true, the additional page on each row will be
- * armed to cause SIGSEGV or SIGBUS on all accesses. This should catch
- * all accesses outside the valid row pixels.
- */
-pixman_image_t *
-fence_image_create_bits (pixman_format_code_t format,
-                         int min_width,
-                         int height,
-                         pixman_bool_t stride_fence)
-{
-    unsigned page_size = fence_get_page_size ();
-    unsigned page_mask = page_size - 1;
-    unsigned bitspp = PIXMAN_FORMAT_BPP (format);
-    unsigned bits_boundary;
-    unsigned row_bits;
-    int width;       /* pixels */
-    unsigned stride; /* bytes */
-    void *pixels;
-    pixman_image_t *image;
-    int i;
-
-    /* must be power of two */
-    assert (page_size && (page_size & page_mask) == 0);
-
-    if (bitspp < 1 || min_width < 1 || height < 1)
-        abort ();
-
-    /* least common multiple between page size * 8 and bitspp */
-    bits_boundary = bitspp;
-    while (! (bits_boundary & 1))
-        bits_boundary >>= 1;
-    bits_boundary *= page_size * 8;
-
-    /* round up to bits_boundary */
-    row_bits = ROUND_UP ( (unsigned)min_width * bitspp, bits_boundary);
-    width = row_bits / bitspp;
-
-    stride = row_bits / 8;
-    if (stride_fence)
-        stride += page_size; /* add fence page */
-
-    if (UINT_MAX / stride < (unsigned)height)
-        abort ();
-
-    pixels = fence_malloc (stride * (unsigned)height);
-    if (!pixels)
-        return NULL;
-
-    if (stride_fence)
-    {
-        uint8_t *guard = (uint8_t *)pixels + stride - page_size;
-
-        /* arm row end fence pages */
-        for (i = 0; i < height; i++)
-        {
-            if (mprotect (guard + i * stride, page_size, PROT_NONE) == -1)
-                goto out_fail;
-        }
-    }
-
-    assert (width >= min_width);
-
-    image = pixman_image_create_bits_no_clear (format, width, height,
-                                               pixels, stride);
-    if (!image)
-        goto out_fail;
-
-    pixman_image_set_destroy_function (image, fence_image_destroy, pixels);
-
-    return image;
-
-out_fail:
-    fence_free (pixels);
-
-    return NULL;
-}
-
-#else /* FENCE_MALLOC_ACTIVE */
-
-void *
-fence_malloc (int64_t len)
-{
-    return malloc (len);
-}
-
-void
-fence_free (void *data)
-{
-    free (data);
-}
-
-pixman_image_t *
-fence_image_create_bits (pixman_format_code_t format,
-                         int min_width,
-                         int height,
-                         pixman_bool_t stride_fence)
-{
-    return pixman_image_create_bits (format, min_width, height, NULL, 0);
-    /* Implicitly allocated storage does not need a destroy function
-     * to get freed on refcount hitting zero.
-     */
-}
-
-unsigned long
-fence_get_page_size ()
-{
-    return 0;
-}
-
-#endif /* FENCE_MALLOC_ACTIVE */
-
-uint8_t *
-make_random_bytes (int n_bytes)
-{
-    uint8_t *bytes = fence_malloc (n_bytes);
-
-    if (!bytes)
-	return NULL;
-
-    prng_randmemset (bytes, n_bytes, 0);
-
-    return bytes;
-}
-
-float *
-make_random_floats (int n_bytes)
-{
-    uint8_t *bytes = fence_malloc (n_bytes);
-    float *vals = (float *)bytes;
-
-    if (!bytes)
-	return 0;
-
-    for (n_bytes /= 4; n_bytes; vals++, n_bytes--)
-	*vals = (float)rand() / (float)RAND_MAX;
-
-    return (float *)bytes;
-}
-
-void
-a8r8g8b8_to_rgba_np (uint32_t *dst, uint32_t *src, int n_pixels)
-{
-    uint8_t *dst8 = (uint8_t *)dst;
-    int i;
-
-    for (i = 0; i < n_pixels; ++i)
-    {
-	uint32_t p = src[i];
-	uint8_t a, r, g, b;
-
-	a = (p & 0xff000000) >> 24;
-	r = (p & 0x00ff0000) >> 16;
-	g = (p & 0x0000ff00) >> 8;
-	b = (p & 0x000000ff) >> 0;
-
-	if (a != 0)
-	{
-#define DIVIDE(c, a)							\
-	    do								\
-	    {								\
-		int t = ((c) * 255) / a;				\
-		(c) = t < 0? 0 : t > 255? 255 : t;			\
-	    } while (0)
-
-	    DIVIDE (r, a);
-	    DIVIDE (g, a);
-	    DIVIDE (b, a);
-	}
-
-	*dst8++ = r;
-	*dst8++ = g;
-	*dst8++ = b;
-	*dst8++ = a;
-    }
-}
-
-#ifdef HAVE_LIBPNG
-
-pixman_bool_t
-write_png (pixman_image_t *image, const char *filename)
-{
-    int width = pixman_image_get_width (image);
-    int height = pixman_image_get_height (image);
-    int stride = width * 4;
-    uint32_t *data = malloc (height * stride);
-    pixman_image_t *copy;
-    png_struct *write_struct;
-    png_info *info_struct;
-    pixman_bool_t result = FALSE;
-    FILE *f = fopen (filename, "wb");
-    png_bytep *row_pointers;
-    int i;
-
-    if (!f)
-	return FALSE;
-
-    row_pointers = malloc (height * sizeof (png_bytep));
-
-    copy = pixman_image_create_bits (
-	PIXMAN_a8r8g8b8, width, height, data, stride);
-
-    pixman_image_composite32 (
-	PIXMAN_OP_SRC, image, NULL, copy, 0, 0, 0, 0, 0, 0, width, height);
-
-    a8r8g8b8_to_rgba_np (data, data, height * width);
-
-    for (i = 0; i < height; ++i)
-	row_pointers[i] = (png_bytep)(data + i * width);
-
-    if (!(write_struct = png_create_write_struct (
-	      PNG_LIBPNG_VER_STRING, NULL, NULL, NULL)))
-	goto out1;
-
-    if (!(info_struct = png_create_info_struct (write_struct)))
-	goto out2;
-
-    png_init_io (write_struct, f);
-
-    png_set_IHDR (write_struct, info_struct, width, height,
-		  8, PNG_COLOR_TYPE_RGB_ALPHA,
-		  PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
-		  PNG_FILTER_TYPE_BASE);
-
-    png_write_info (write_struct, info_struct);
-
-    png_write_image (write_struct, row_pointers);
-
-    png_write_end (write_struct, NULL);
-
-    result = TRUE;
-
-out2:
-    png_destroy_write_struct (&write_struct, &info_struct);
-
-out1:
-    if (fclose (f) != 0)
-	result = FALSE;
-
-    pixman_image_unref (copy);
-    free (row_pointers);
-    free (data);
-    return result;
-}
-
-#else /* no libpng */
-
-pixman_bool_t
-write_png (pixman_image_t *image, const char *filename)
-{
-    return FALSE;
-}
-
-#endif
-
-static void
-color8_to_color16 (uint32_t color8, pixman_color_t *color16)
-{
-    color16->alpha = ((color8 & 0xff000000) >> 24);
-    color16->red =   ((color8 & 0x00ff0000) >> 16);
-    color16->green = ((color8 & 0x0000ff00) >> 8);
-    color16->blue =  ((color8 & 0x000000ff) >> 0);
-
-    color16->alpha |= color16->alpha << 8;
-    color16->red   |= color16->red << 8;
-    color16->blue  |= color16->blue << 8;
-    color16->green |= color16->green << 8;
-}
-
-void
-draw_checkerboard (pixman_image_t *image,
-		   int check_size,
-		   uint32_t color1, uint32_t color2)
-{
-    pixman_color_t check1, check2;
-    pixman_image_t *c1, *c2;
-    int n_checks_x, n_checks_y;
-    int i, j;
-
-    color8_to_color16 (color1, &check1);
-    color8_to_color16 (color2, &check2);
-    
-    c1 = pixman_image_create_solid_fill (&check1);
-    c2 = pixman_image_create_solid_fill (&check2);
-
-    n_checks_x = (
-	pixman_image_get_width (image) + check_size - 1) / check_size;
-    n_checks_y = (
-	pixman_image_get_height (image) + check_size - 1) / check_size;
-
-    for (j = 0; j < n_checks_y; j++)
-    {
-	for (i = 0; i < n_checks_x; i++)
-	{
-	    pixman_image_t *src;
-
-	    if (((i ^ j) & 1))
-		src = c1;
-	    else
-		src = c2;
-
-	    pixman_image_composite32 (PIXMAN_OP_SRC, src, NULL, image,
-				      0, 0, 0, 0,
-				      i * check_size, j * check_size,
-				      check_size, check_size);
-	}
-    }
-}
-
-static uint32_t
-call_test_function (uint32_t    (*test_function)(int testnum, int verbose),
-		    int		testnum,
-		    int		verbose)
-{
-    uint32_t retval;
-
-#if defined (__GNUC__) && defined (_WIN32) && (defined (__i386) || defined (__i386__))
-    __asm__ (
-	/* Deliberately avoid aligning the stack to 16 bytes */
-	"pushl	%1\n\t"
-	"pushl	%2\n\t"
-	"call	*%3\n\t"
-	"addl	$8, %%esp\n\t"
-	: "=a" (retval)
-	: "r" (verbose),
-	  "r" (testnum),
-	  "r" (test_function)
-	: "edx", "ecx"); /* caller save registers */
-#else
-    retval = test_function (testnum, verbose);
-#endif
-
-    return retval;
-}
-
-/*
- * A function, which can be used as a core part of the test programs,
- * intended to detect various problems with the help of fuzzing input
- * to pixman API (according to some templates, aka "smart" fuzzing).
- * Some general information about such testing can be found here:
- * http://en.wikipedia.org/wiki/Fuzz_testing
- *
- * It may help detecting:
- *  - crashes on bad handling of valid or reasonably invalid input to
- *    pixman API.
- *  - deviations from the behavior of older pixman releases.
- *  - deviations from the behavior of the same pixman release, but
- *    configured in a different way (for example with SIMD optimizations
- *    disabled), or running on a different OS or hardware.
- *
- * The test is performed by calling a callback function a huge number
- * of times. The callback function is expected to run some snippet of
- * pixman code with pseudorandom variations to the data feeded to
- * pixman API. A result of running each callback function should be
- * some deterministic value which depends on test number (test number
- * can be used as a seed for PRNG). When 'verbose' argument is nonzero,
- * callback function is expected to print to stdout some information
- * about what it does.
- *
- * Return values from many small tests are accumulated together and
- * used as final checksum, which can be compared to some expected
- * value. Running the tests not individually, but in a batch helps
- * to reduce process start overhead and also allows to parallelize
- * testing and utilize multiple CPU cores.
- *
- * The resulting executable can be run without any arguments. In
- * this case it runs a batch of tests starting from 1 and up to
- * 'default_number_of_iterations'. The resulting checksum is
- * compared with 'expected_checksum' and FAIL or PASS verdict
- * depends on the result of this comparison.
- *
- * If the executable is run with 2 numbers provided as command line
- * arguments, they specify the starting and ending numbers for a test
- * batch.
- *
- * If the executable is run with only one number provided as a command
- * line argument, then this number is used to call the callback function
- * once, and also with verbose flag set.
- */
-int
-fuzzer_test_main (const char *test_name,
-		  int         default_number_of_iterations,
-		  uint32_t    expected_checksum,
-		  uint32_t    (*test_function)(int testnum, int verbose),
-		  int         argc,
-		  const char *argv[])
-{
-    int i, n1 = 1, n2 = 0;
-    uint32_t checksum = 0;
-    int verbose = getenv ("VERBOSE") != NULL;
-
-    if (argc >= 3)
-    {
-	n1 = atoi (argv[1]);
-	n2 = atoi (argv[2]);
-	if (n2 < n1)
-	{
-	    printf ("invalid test range\n");
-	    return 1;
-	}
-    }
-    else if (argc >= 2)
-    {
-	n2 = atoi (argv[1]);
-
-	checksum = call_test_function (test_function, n2, 1);
-
-	printf ("%d: checksum=%08X\n", n2, checksum);
-	return 0;
-    }
-    else
-    {
-	n1 = 1;
-	n2 = default_number_of_iterations;
-    }
-
-#ifdef USE_OPENMP
-    #pragma omp parallel for reduction(+:checksum) default(none) \
-					shared(n1, n2, test_function, verbose)
-#endif
-    for (i = n1; i <= n2; i++)
-    {
-	uint32_t crc = call_test_function (test_function, i, 0);
-	if (verbose)
-	    printf ("%d: %08X\n", i, crc);
-	checksum += crc;
-    }
-
-    if (n1 == 1 && n2 == default_number_of_iterations)
-    {
-	if (checksum == expected_checksum)
-	{
-	    printf ("%s test passed (checksum=%08X)\n",
-		    test_name, checksum);
-	}
-	else
-	{
-	    printf ("%s test failed! (checksum=%08X, expected %08X)\n",
-		    test_name, checksum, expected_checksum);
-	    return 1;
-	}
-    }
-    else
-    {
-	printf ("%d-%d: checksum=%08X\n", n1, n2, checksum);
-    }
-
-    return 0;
-}
-
-/* Try to obtain current time in seconds */
-double
-gettime (void)
-{
-#ifdef HAVE_GETTIMEOFDAY
-    struct timeval tv;
-
-    gettimeofday (&tv, NULL);
-    return (double)((int64_t)tv.tv_sec * 1000000 + tv.tv_usec) / 1000000.;
-#else
-    return (double)clock() / (double)CLOCKS_PER_SEC;
-#endif
-}
-
-uint32_t
-get_random_seed (void)
-{
-    union { double d; uint32_t u32; } t;
-    t.d = gettime();
-    prng_srand (t.u32);
-
-    return prng_rand ();
-}
-
-#ifdef HAVE_SIGACTION
-#ifdef HAVE_ALARM
-static const char *global_msg;
-
-static void
-on_alarm (int signo)
-{
-    printf ("%s\n", global_msg);
-    exit (1);
-}
-#endif
-#endif
-
-void
-fail_after (int seconds, const char *msg)
-{
-#ifdef HAVE_SIGACTION
-#ifdef HAVE_ALARM
-    struct sigaction action;
-
-    global_msg = msg;
-
-    memset (&action, 0, sizeof (action));
-    action.sa_handler = on_alarm;
-
-    alarm (seconds);
-
-    sigaction (SIGALRM, &action, NULL);
-#endif
-#endif
-}
-
-void
-enable_divbyzero_exceptions (void)
-{
-#ifdef HAVE_FENV_H
-#ifdef HAVE_FEENABLEEXCEPT
-#ifdef HAVE_FEDIVBYZERO
-    feenableexcept (FE_DIVBYZERO);
-#endif
-#endif
-#endif
-}
-
-void
-enable_invalid_exceptions (void)
-{
-#ifdef HAVE_FENV_H
-#ifdef HAVE_FEENABLEEXCEPT
-#ifdef FE_INVALID
-    feenableexcept (FE_INVALID);
-#endif
-#endif
-#endif
-}
-
-void *
-aligned_malloc (size_t align, size_t size)
-{
-    void *result;
-
-#ifdef HAVE_POSIX_MEMALIGN
-    if (posix_memalign (&result, align, size) != 0)
-      result = NULL;
-#else
-    result = malloc (size);
-#endif
-
-    return result;
-}
-
-#define CONVERT_15(c, is_rgb)						\
-    (is_rgb?								\
-     ((((c) >> 3) & 0x001f) |						\
-      (((c) >> 6) & 0x03e0) |						\
-      (((c) >> 9) & 0x7c00)) :						\
-     (((((c) >> 16) & 0xff) * 153 +					\
-       (((c) >>  8) & 0xff) * 301 +					\
-       (((c)      ) & 0xff) * 58) >> 2))
-
-double
-convert_srgb_to_linear (double c)
-{
-    if (c <= 0.04045)
-        return c / 12.92;
-    else
-        return pow ((c + 0.055) / 1.055, 2.4);
-}
-
-double
-convert_linear_to_srgb (double c)
-{
-    if (c <= 0.0031308)
-        return c * 12.92;
-    else
-        return 1.055 * pow (c, 1.0/2.4) - 0.055;
-}
-
-void
-initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb)
-{
-    int i;
-    uint32_t mask = (1 << depth) - 1;
-
-    for (i = 0; i < 32768; ++i)
-	palette->ent[i] = prng_rand() & mask;
-
-    memset (palette->rgba, 0, sizeof (palette->rgba));
-
-    for (i = 0; i < mask + 1; ++i)
-    {
-	uint32_t rgba24;
- 	pixman_bool_t retry;
-	uint32_t i15;
-
-	/* We filled the rgb->index map with random numbers, but we
-	 * do need the ability to round trip, that is if some indexed
-	 * color expands to an argb24, then the 15 bit version of that
-	 * color must map back to the index. Anything else, we don't
-	 * care about too much.
-	 */
-	do
-	{
-	    uint32_t old_idx;
-
-	    rgba24 = prng_rand();
-	    i15 = CONVERT_15 (rgba24, is_rgb);
-
-	    old_idx = palette->ent[i15];
-	    if (CONVERT_15 (palette->rgba[old_idx], is_rgb) == i15)
-		retry = 1;
-	    else
-		retry = 0;
-	} while (retry);
-
-	palette->rgba[i] = rgba24;
-	palette->ent[i15] = i;
-    }
-
-    for (i = 0; i < mask + 1; ++i)
-    {
-	assert (palette->ent[CONVERT_15 (palette->rgba[i], is_rgb)] == i);
-    }
-}
-
-struct operator_entry {
-    pixman_op_t		 op;
-    const char		*name;
-    pixman_bool_t	 is_alias;
-};
-
-typedef struct operator_entry operator_entry_t;
-
-static const operator_entry_t op_list[] =
-{
-#define ENTRY(op)							\
-    { PIXMAN_OP_##op, "PIXMAN_OP_" #op, FALSE }
-#define ALIAS(op, nam)							\
-    { PIXMAN_OP_##op, nam, TRUE }
-
-    /* operator_name () will return the first hit in this table,
-     * so keep the list properly ordered between entries and aliases.
-     * Aliases are not listed by list_operators ().
-     */
-
-    ENTRY (CLEAR),
-    ENTRY (SRC),
-    ENTRY (DST),
-    ENTRY (OVER),
-    ENTRY (OVER_REVERSE),
-    ALIAS (OVER_REVERSE,		"overrev"),
-    ENTRY (IN),
-    ENTRY (IN_REVERSE),
-    ALIAS (IN_REVERSE,			"inrev"),
-    ENTRY (OUT),
-    ENTRY (OUT_REVERSE),
-    ALIAS (OUT_REVERSE,			"outrev"),
-    ENTRY (ATOP),
-    ENTRY (ATOP_REVERSE),
-    ALIAS (ATOP_REVERSE,		"atoprev"),
-    ENTRY (XOR),
-    ENTRY (ADD),
-    ENTRY (SATURATE),
-
-    ENTRY (DISJOINT_CLEAR),
-    ENTRY (DISJOINT_SRC),
-    ENTRY (DISJOINT_DST),
-    ENTRY (DISJOINT_OVER),
-    ENTRY (DISJOINT_OVER_REVERSE),
-    ENTRY (DISJOINT_IN),
-    ENTRY (DISJOINT_IN_REVERSE),
-    ENTRY (DISJOINT_OUT),
-    ENTRY (DISJOINT_OUT_REVERSE),
-    ENTRY (DISJOINT_ATOP),
-    ENTRY (DISJOINT_ATOP_REVERSE),
-    ENTRY (DISJOINT_XOR),
-
-    ENTRY (CONJOINT_CLEAR),
-    ENTRY (CONJOINT_SRC),
-    ENTRY (CONJOINT_DST),
-    ENTRY (CONJOINT_OVER),
-    ENTRY (CONJOINT_OVER_REVERSE),
-    ENTRY (CONJOINT_IN),
-    ENTRY (CONJOINT_IN_REVERSE),
-    ENTRY (CONJOINT_OUT),
-    ENTRY (CONJOINT_OUT_REVERSE),
-    ENTRY (CONJOINT_ATOP),
-    ENTRY (CONJOINT_ATOP_REVERSE),
-    ENTRY (CONJOINT_XOR),
-
-    ENTRY (MULTIPLY),
-    ENTRY (SCREEN),
-    ENTRY (OVERLAY),
-    ENTRY (DARKEN),
-    ENTRY (LIGHTEN),
-    ENTRY (COLOR_DODGE),
-    ENTRY (COLOR_BURN),
-    ENTRY (HARD_LIGHT),
-    ENTRY (SOFT_LIGHT),
-    ENTRY (DIFFERENCE),
-    ENTRY (EXCLUSION),
-    ENTRY (HSL_HUE),
-    ENTRY (HSL_SATURATION),
-    ENTRY (HSL_COLOR),
-    ENTRY (HSL_LUMINOSITY),
-
-    ALIAS (NONE, "<invalid operator 'none'>")
-
-#undef ENTRY
-#undef ALIAS
-};
-
-typedef struct {
-    pixman_dither_t	 dither;
-    const char		*name;
-    pixman_bool_t	 is_alias;
-} dither_entry_t;
-
-static const dither_entry_t dither_list[] =
-{
-#define ENTRY(dither)							\
-    { PIXMAN_DITHER_##dither, "PIXMAN_DITHER_" #dither, FALSE }
-#define ALIAS(dither, nam)							\
-    { PIXMAN_DITHER_##dither, nam, TRUE }
-
-    /* dither_name () will return the first hit in this table,
-     * so keep the list properly ordered between entries and aliases.
-     * Aliases are not listed by list_dithers ().
-     */
-
-    ENTRY (ORDERED_BAYER_8),
-    ENTRY (ORDERED_BLUE_NOISE_64),
-    ENTRY (NONE),
-
-#undef ENTRY
-#undef ALIAS
-};
-
-struct format_entry
-{
-    pixman_format_code_t format;
-    const char		*name;
-    pixman_bool_t	 is_alias;
-};
-
-typedef struct format_entry format_entry_t;
-
-static const format_entry_t format_list[] =
-{
-#define ENTRY(f)							\
-    { PIXMAN_##f, #f, FALSE }
-#define ALIAS(f, nam)							\
-    { PIXMAN_##f, nam, TRUE }
-
-    /* format_name () will return the first hit in this table,
-     * so keep the list properly ordered between entries and aliases.
-     * Aliases are not listed by list_formats ().
-     */
-
-/* 128bpp formats */
-    ENTRY (rgba_float),
-/* 96bpp formats */
-    ENTRY (rgb_float),
-
-/* 32bpp formats */
-    ENTRY (a8r8g8b8),
-    ALIAS (a8r8g8b8,		"8888"),
-    ENTRY (x8r8g8b8),
-    ALIAS (x8r8g8b8,		"x888"),
-    ENTRY (a8b8g8r8),
-    ENTRY (x8b8g8r8),
-    ENTRY (b8g8r8a8),
-    ENTRY (b8g8r8x8),
-    ENTRY (r8g8b8a8),
-    ENTRY (r8g8b8x8),
-    ENTRY (x14r6g6b6),
-    ENTRY (x2r10g10b10),
-    ALIAS (x2r10g10b10,		"2x10"),
-    ENTRY (a2r10g10b10),
-    ALIAS (a2r10g10b10,		"2a10"),
-    ENTRY (x2b10g10r10),
-    ENTRY (a2b10g10r10),
-
-/* sRGB formats */
-    ENTRY (a8r8g8b8_sRGB),
-
-/* 24bpp formats */
-    ENTRY (r8g8b8),
-    ALIAS (r8g8b8,		"0888"),
-    ENTRY (b8g8r8),
-
-/* 16 bpp formats */
-    ENTRY (r5g6b5),
-    ALIAS (r5g6b5,		"0565"),
-    ENTRY (b5g6r5),
-
-    ENTRY (a1r5g5b5),
-    ALIAS (a1r5g5b5,		"1555"),
-    ENTRY (x1r5g5b5),
-    ENTRY (a1b5g5r5),
-    ENTRY (x1b5g5r5),
-    ENTRY (a4r4g4b4),
-    ALIAS (a4r4g4b4,		"4444"),
-    ENTRY (x4r4g4b4),
-    ENTRY (a4b4g4r4),
-    ENTRY (x4b4g4r4),
-
-/* 8bpp formats */
-    ENTRY (a8),
-    ALIAS (a8,			"8"),
-    ENTRY (r3g3b2),
-    ENTRY (b2g3r3),
-    ENTRY (a2r2g2b2),
-    ALIAS (a2r2g2b2,		"2222"),
-    ENTRY (a2b2g2r2),
-
-    ALIAS (c8,			"x4c4 / c8"),
-    /* ENTRY (c8), */
-    ALIAS (g8,			"x4g4 / g8"),
-    /* ENTRY (g8), */
-
-    ENTRY (x4a4),
-
-    /* These format codes are identical to c8 and g8, respectively. */
-    /* ENTRY (x4c4), */
-    /* ENTRY (x4g4), */
-
-/* 4 bpp formats */
-    ENTRY (a4),
-    ENTRY (r1g2b1),
-    ENTRY (b1g2r1),
-    ENTRY (a1r1g1b1),
-    ENTRY (a1b1g1r1),
-
-    ALIAS (c4,			"c4"),
-    /* ENTRY (c4), */
-    ALIAS (g4,			"g4"),
-    /* ENTRY (g4), */
-
-/* 1bpp formats */
-    ENTRY (a1),
-
-    ALIAS (g1,			"g1"),
-    /* ENTRY (g1), */
-
-/* YUV formats */
-    ALIAS (yuy2,		"yuy2"),
-    /* ENTRY (yuy2), */
-    ALIAS (yv12,		"yv12"),
-    /* ENTRY (yv12), */
-
-/* Fake formats, not in pixman_format_code_t enum */
-    ALIAS (null,		"null"),
-    ALIAS (solid,		"solid"),
-    ALIAS (solid,		"n"),
-    ALIAS (pixbuf,		"pixbuf"),
-    ALIAS (rpixbuf,		"rpixbuf"),
-    ALIAS (unknown,		"unknown"),
-
-#undef ENTRY
-#undef ALIAS
-};
-
-pixman_format_code_t
-format_from_string (const char *s)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_LENGTH (format_list); ++i)
-    {
-        const format_entry_t *ent = &format_list[i];
-
-        if (strcasecmp (ent->name, s) == 0)
-            return ent->format;
-    }
-
-    return PIXMAN_null;
-}
-
-static void
-emit (const char *s, int *n_chars)
-{
-    *n_chars += printf ("%s,", s);
-    if (*n_chars > 60)
-    {
-        printf ("\n    ");
-        *n_chars = 0;
-    }
-    else
-    {
-        printf (" ");
-        (*n_chars)++;
-    }
-}
-
-void
-list_formats (void)
-{
-    int n_chars;
-    int i;
-
-    printf ("Formats:\n    ");
-
-    n_chars = 0;
-    for (i = 0; i < ARRAY_LENGTH (format_list); ++i)
-    {
-        const format_entry_t *ent = &format_list[i];
-
-        if (ent->is_alias)
-            continue;
-
-        emit (ent->name, &n_chars);
-    }
-
-    printf ("\n\n");
-}
-
-void
-list_operators (void)
-{
-    char short_name [128] = { 0 };
-    int i, n_chars;
-
-    printf ("Operators:\n    ");
-
-    n_chars = 0;
-    for (i = 0; i < ARRAY_LENGTH (op_list); ++i)
-    {
-        const operator_entry_t *ent = &op_list[i];
-        int j;
-
-        if (ent->is_alias)
-            continue;
-
-        snprintf (short_name, sizeof (short_name) - 1, "%s",
-                  ent->name + strlen ("PIXMAN_OP_"));
-
-        for (j = 0; short_name[j] != '\0'; ++j)
-            short_name[j] = tolower (short_name[j]);
-
-        emit (short_name, &n_chars);
-    }
-
-    printf ("\n\n");
-}
-
-void
-list_dithers (void)
-{
-    int n_chars;
-    int i;
-
-    printf ("Dithers:\n    ");
-
-    n_chars = 0;
-    for (i = 0; i < ARRAY_LENGTH (dither_list); ++i)
-    {
-        const dither_entry_t *ent = &dither_list[i];
-
-        if (ent->is_alias)
-            continue;
-
-        emit (ent->name, &n_chars);
-    }
-
-    printf ("\n\n");
-}
-
-pixman_op_t
-operator_from_string (const char *s)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_LENGTH (op_list); ++i)
-    {
-        const operator_entry_t *ent = &op_list[i];
-
-        if (ent->is_alias)
-        {
-            if (strcasecmp (ent->name, s) == 0)
-                return ent->op;
-        }
-        else
-        {
-            if (strcasecmp (ent->name + strlen ("PIXMAN_OP_"), s) == 0)
-                return ent->op;
-        }
-    }
-
-    return PIXMAN_OP_NONE;
-}
-
-pixman_dither_t
-dither_from_string (const char *s)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_LENGTH (dither_list); ++i)
-    {
-        const dither_entry_t *ent = &dither_list[i];
-
-        if (strcasecmp (ent->name, s) == 0)
-            return ent->dither;
-    }
-
-    return PIXMAN_DITHER_NONE;
-}
-
-const char *
-operator_name (pixman_op_t op)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_LENGTH (op_list); ++i)
-    {
-        const operator_entry_t *ent = &op_list[i];
-
-        if (ent->op == op)
-            return ent->name;
-    }
-
-    return "<unknown operator>";
-}
-
-const char *
-format_name (pixman_format_code_t format)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_LENGTH (format_list); ++i)
-    {
-        const format_entry_t *ent = &format_list[i];
-
-        if (ent->format == format)
-            return ent->name;
-    }
-
-    return "<unknown format>";
-};
-
-const char *
-dither_name (pixman_dither_t dither)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_LENGTH (dither_list); ++i)
-    {
-	const dither_entry_t *ent = &dither_list[i];
-
-	if (ent->dither == dither)
-	    return ent->name;
-    }
-
-    return "<unknown dither>";
-}
-
-#define IS_ZERO(f)     (-DBL_MIN < (f) && (f) < DBL_MIN)
-
-typedef double (* blend_func_t) (double as, double s, double ad, double d);
-
-static force_inline double
-blend_multiply (double sa, double s, double da, double d)
-{
-    return d * s;
-}
-
-static force_inline double
-blend_screen (double sa, double s, double da, double d)
-{
-    return d * sa + s * da - s * d;
-}
-
-static force_inline double
-blend_overlay (double sa, double s, double da, double d)
-{
-    if (2 * d < da)
-        return 2 * s * d;
-    else
-        return sa * da - 2 * (da - d) * (sa - s);
-}
-
-static force_inline double
-blend_darken (double sa, double s, double da, double d)
-{
-    s = s * da;
-    d = d * sa;
-
-    if (s > d)
-        return d;
-    else
-        return s;
-}
-
-static force_inline double
-blend_lighten (double sa, double s, double da, double d)
-{
-    s = s * da;
-    d = d * sa;
-
-    if (s > d)
-        return s;
-    else
-        return d;
-}
-
-static force_inline double
-blend_color_dodge (double sa, double s, double da, double d)
-{
-    if (IS_ZERO (d))
-        return 0.0f;
-    else if (d * sa >= sa * da - s * da)
-        return sa * da;
-    else if (IS_ZERO (sa - s))
-        return sa * da;
-    else
-        return sa * sa * d / (sa - s);
-}
-
-static force_inline double
-blend_color_burn (double sa, double s, double da, double d)
-{
-    if (d >= da)
-        return sa * da;
-    else if (sa * (da - d) >= s * da)
-        return 0.0f;
-    else if (IS_ZERO (s))
-        return 0.0f;
-    else
-        return sa * (da - sa * (da - d) / s);
-}
-
-static force_inline double
-blend_hard_light (double sa, double s, double da, double d)
-{
-    if (2 * s < sa)
-        return 2 * s * d;
-    else
-        return sa * da - 2 * (da - d) * (sa - s);
-}
-
-static force_inline double
-blend_soft_light (double sa, double s, double da, double d)
-{
-    if (2 * s <= sa)
-    {
-        if (IS_ZERO (da))
-            return d * sa;
-        else
-            return d * sa - d * (da - d) * (sa - 2 * s) / da;
-    }
-    else
-    {
-        if (IS_ZERO (da))
-        {
-	    return d * sa;
-        }
-        else
-        {
-            if (4 * d <= da)
-                return d * sa + (2 * s - sa) * d * ((16 * d / da - 12) * d / da + 3);
-            else
-                return d * sa + (sqrt (d * da) - d) * (2 * s - sa);
-        }
-    }
-}
-
-static force_inline double
-blend_difference (double sa, double s, double da, double d)
-{
-    double dsa = d * sa;
-    double sda = s * da;
-
-    if (sda < dsa)
-        return dsa - sda;
-    else
-        return sda - dsa;
-}
-
-static force_inline double
-blend_exclusion (double sa, double s, double da, double d)
-{
-    return s * da + d * sa - 2 * d * s;
-}
-
-static double
-clamp (double d)
-{
-    if (d > 1.0)
-	return 1.0;
-    else if (d < 0.0)
-	return 0.0;
-    else
-	return d;
-}
-
-static double
-blend_channel (double as, double s, double ad, double d,
-                   blend_func_t blend)
-{
-    return clamp ((1 - ad) * s + (1 - as) * d + blend (as, s, ad, d));
-}
-
-static double
-calc_op (pixman_op_t op, double src, double dst, double srca, double dsta)
-{
-#define mult_chan(src, dst, Fa, Fb) MIN ((src) * (Fa) + (dst) * (Fb), 1.0)
-
-    double Fa, Fb;
-
-    switch (op)
-    {
-    case PIXMAN_OP_CLEAR:
-    case PIXMAN_OP_DISJOINT_CLEAR:
-    case PIXMAN_OP_CONJOINT_CLEAR:
-	return mult_chan (src, dst, 0.0, 0.0);
-
-    case PIXMAN_OP_SRC:
-    case PIXMAN_OP_DISJOINT_SRC:
-    case PIXMAN_OP_CONJOINT_SRC:
-	return mult_chan (src, dst, 1.0, 0.0);
-
-    case PIXMAN_OP_DST:
-    case PIXMAN_OP_DISJOINT_DST:
-    case PIXMAN_OP_CONJOINT_DST:
-	return mult_chan (src, dst, 0.0, 1.0);
-
-    case PIXMAN_OP_OVER:
-	return mult_chan (src, dst, 1.0, 1.0 - srca);
-
-    case PIXMAN_OP_OVER_REVERSE:
-	return mult_chan (src, dst, 1.0 - dsta, 1.0);
-
-    case PIXMAN_OP_IN:
-	return mult_chan (src, dst, dsta, 0.0);
-
-    case PIXMAN_OP_IN_REVERSE:
-	return mult_chan (src, dst, 0.0, srca);
-
-    case PIXMAN_OP_OUT:
-	return mult_chan (src, dst, 1.0 - dsta, 0.0);
-
-    case PIXMAN_OP_OUT_REVERSE:
-	return mult_chan (src, dst, 0.0, 1.0 - srca);
-
-    case PIXMAN_OP_ATOP:
-	return mult_chan (src, dst, dsta, 1.0 - srca);
-
-    case PIXMAN_OP_ATOP_REVERSE:
-	return mult_chan (src, dst, 1.0 - dsta,  srca);
-
-    case PIXMAN_OP_XOR:
-	return mult_chan (src, dst, 1.0 - dsta, 1.0 - srca);
-
-    case PIXMAN_OP_ADD:
-	return mult_chan (src, dst, 1.0, 1.0);
-
-    case PIXMAN_OP_SATURATE:
-    case PIXMAN_OP_DISJOINT_OVER_REVERSE:
-	if (srca == 0.0)
-	    Fa = 1.0;
-	else
-	    Fa = MIN (1.0, (1.0 - dsta) / srca);
-	return mult_chan (src, dst, Fa, 1.0);
-
-    case PIXMAN_OP_DISJOINT_OVER:
-	if (dsta == 0.0)
-	    Fb = 1.0;
-	else
-	    Fb = MIN (1.0, (1.0 - srca) / dsta);
-	return mult_chan (src, dst, 1.0, Fb);
-
-    case PIXMAN_OP_DISJOINT_IN:
-	if (srca == 0.0)
-	    Fa = 0.0;
-	else
-	    Fa = MAX (0.0, 1.0 - (1.0 - dsta) / srca);
-	return mult_chan (src, dst, Fa, 0.0);
-
-    case PIXMAN_OP_DISJOINT_IN_REVERSE:
-	if (dsta == 0.0)
-	    Fb = 0.0;
-	else
-	    Fb = MAX (0.0, 1.0 - (1.0 - srca) / dsta);
-	return mult_chan (src, dst, 0.0, Fb);
-
-    case PIXMAN_OP_DISJOINT_OUT:
-	if (srca == 0.0)
-	    Fa = 1.0;
-	else
-	    Fa = MIN (1.0, (1.0 - dsta) / srca);
-	return mult_chan (src, dst, Fa, 0.0);
-
-    case PIXMAN_OP_DISJOINT_OUT_REVERSE:
-	if (dsta == 0.0)
-	    Fb = 1.0;
-	else
-	    Fb = MIN (1.0, (1.0 - srca) / dsta);
-	return mult_chan (src, dst, 0.0, Fb);
-
-    case PIXMAN_OP_DISJOINT_ATOP:
-	if (srca == 0.0)
-	    Fa = 0.0;
-	else
-	    Fa = MAX (0.0, 1.0 - (1.0 - dsta) / srca);
-	if (dsta == 0.0)
-	    Fb = 1.0;
-	else
-	    Fb = MIN (1.0, (1.0 - srca) / dsta);
-	return mult_chan (src, dst, Fa, Fb);
-
-    case PIXMAN_OP_DISJOINT_ATOP_REVERSE:
-	if (srca == 0.0)
-	    Fa = 1.0;
-	else
-	    Fa = MIN (1.0, (1.0 - dsta) / srca);
-	if (dsta == 0.0)
-	    Fb = 0.0;
-	else
-	    Fb = MAX (0.0, 1.0 - (1.0 - srca) / dsta);
-	return mult_chan (src, dst, Fa, Fb);
-
-    case PIXMAN_OP_DISJOINT_XOR:
-	if (srca == 0.0)
-	    Fa = 1.0;
-	else
-	    Fa = MIN (1.0, (1.0 - dsta) / srca);
-	if (dsta == 0.0)
-	    Fb = 1.0;
-	else
-	    Fb = MIN (1.0, (1.0 - srca) / dsta);
-	return mult_chan (src, dst, Fa, Fb);
-
-    case PIXMAN_OP_CONJOINT_OVER:
-	if (dsta == 0.0)
-	    Fb = 0.0;
-	else
-	    Fb = MAX (0.0, 1.0 - srca / dsta);
-	return mult_chan (src, dst, 1.0, Fb);
-
-    case PIXMAN_OP_CONJOINT_OVER_REVERSE:
-	if (srca == 0.0)
-	    Fa = 0.0;
-	else
-	    Fa = MAX (0.0, 1.0 - dsta / srca);
-	return mult_chan (src, dst, Fa, 1.0);
-
-    case PIXMAN_OP_CONJOINT_IN:
-	if (srca == 0.0)
-	    Fa = 1.0;
-	else
-	    Fa = MIN (1.0, dsta / srca);
-	return mult_chan (src, dst, Fa, 0.0);
-
-    case PIXMAN_OP_CONJOINT_IN_REVERSE:
-	if (dsta == 0.0)
-	    Fb = 1.0;
-	else
-	    Fb = MIN (1.0, srca / dsta);
-	return mult_chan (src, dst, 0.0, Fb);
-
-    case PIXMAN_OP_CONJOINT_OUT:
-	if (srca == 0.0)
-	    Fa = 0.0;
-	else
-	    Fa = MAX (0.0, 1.0 - dsta / srca);
-	return mult_chan (src, dst, Fa, 0.0);
-
-    case PIXMAN_OP_CONJOINT_OUT_REVERSE:
-	if (dsta == 0.0)
-	    Fb = 0.0;
-	else
-	    Fb = MAX (0.0, 1.0 - srca / dsta);
-	return mult_chan (src, dst, 0.0, Fb);
-
-    case PIXMAN_OP_CONJOINT_ATOP:
-	if (srca == 0.0)
-	    Fa = 1.0;
-	else
-	    Fa = MIN (1.0, dsta / srca);
-	if (dsta == 0.0)
-	    Fb = 0.0;
-	else
-	    Fb = MAX (0.0, 1.0 - srca / dsta);
-	return mult_chan (src, dst, Fa, Fb);
-
-    case PIXMAN_OP_CONJOINT_ATOP_REVERSE:
-	if (srca == 0.0)
-	    Fa = 0.0;
-	else
-	    Fa = MAX (0.0, 1.0 - dsta / srca);
-	if (dsta == 0.0)
-	    Fb = 1.0;
-	else
-	    Fb = MIN (1.0, srca / dsta);
-	return mult_chan (src, dst, Fa, Fb);
-
-    case PIXMAN_OP_CONJOINT_XOR:
-	if (srca == 0.0)
-	    Fa = 0.0;
-	else
-	    Fa = MAX (0.0, 1.0 - dsta / srca);
-	if (dsta == 0.0)
-	    Fb = 0.0;
-	else
-	    Fb = MAX (0.0, 1.0 - srca / dsta);
-	return mult_chan (src, dst, Fa, Fb);
-
-    case PIXMAN_OP_MULTIPLY:
-    case PIXMAN_OP_SCREEN:
-    case PIXMAN_OP_OVERLAY:
-    case PIXMAN_OP_DARKEN:
-    case PIXMAN_OP_LIGHTEN:
-    case PIXMAN_OP_COLOR_DODGE:
-    case PIXMAN_OP_COLOR_BURN:
-    case PIXMAN_OP_HARD_LIGHT:
-    case PIXMAN_OP_SOFT_LIGHT:
-    case PIXMAN_OP_DIFFERENCE:
-    case PIXMAN_OP_EXCLUSION:
-    case PIXMAN_OP_HSL_HUE:
-    case PIXMAN_OP_HSL_SATURATION:
-    case PIXMAN_OP_HSL_COLOR:
-    case PIXMAN_OP_HSL_LUMINOSITY:
-    default:
-	abort();
-	return 0; /* silence MSVC */
-    }
-#undef mult_chan
-}
-
-void
-do_composite (pixman_op_t op,
-	      const color_t *src,
-	      const color_t *mask,
-	      const color_t *dst,
-	      color_t *result,
-	      pixman_bool_t component_alpha)
-{
-    color_t srcval, srcalpha;
-
-    static const blend_func_t blend_funcs[] =
-    {
-        blend_multiply,
-        blend_screen,
-        blend_overlay,
-        blend_darken,
-        blend_lighten,
-        blend_color_dodge,
-        blend_color_burn,
-        blend_hard_light,
-        blend_soft_light,
-        blend_difference,
-        blend_exclusion,
-    };
-
-    if (mask == NULL)
-    {
-	srcval = *src;
-
-	srcalpha.r = src->a;
-	srcalpha.g = src->a;
-	srcalpha.b = src->a;
-	srcalpha.a = src->a;
-    }
-    else if (component_alpha)
-    {
-	srcval.r = src->r * mask->r;
-	srcval.g = src->g * mask->g;
-	srcval.b = src->b * mask->b;
-	srcval.a = src->a * mask->a;
-
-	srcalpha.r = src->a * mask->r;
-	srcalpha.g = src->a * mask->g;
-	srcalpha.b = src->a * mask->b;
-	srcalpha.a = src->a * mask->a;
-    }
-    else
-    {
-	srcval.r = src->r * mask->a;
-	srcval.g = src->g * mask->a;
-	srcval.b = src->b * mask->a;
-	srcval.a = src->a * mask->a;
-
-	srcalpha.r = src->a * mask->a;
-	srcalpha.g = src->a * mask->a;
-	srcalpha.b = src->a * mask->a;
-	srcalpha.a = src->a * mask->a;
-    }
-
-    if (op >= PIXMAN_OP_MULTIPLY)
-    {
-        blend_func_t func = blend_funcs[op - PIXMAN_OP_MULTIPLY];
-
-	result->a = srcalpha.a + dst->a - srcalpha.a * dst->a;
-	result->r = blend_channel (srcalpha.r, srcval.r, dst->a, dst->r, func);
-	result->g = blend_channel (srcalpha.g, srcval.g, dst->a, dst->g, func);
-	result->b = blend_channel (srcalpha.b, srcval.b, dst->a, dst->b, func);
-    }
-    else
-    {
-        result->r = calc_op (op, srcval.r, dst->r, srcalpha.r, dst->a);
-        result->g = calc_op (op, srcval.g, dst->g, srcalpha.g, dst->a);
-        result->b = calc_op (op, srcval.b, dst->b, srcalpha.b, dst->a);
-        result->a = calc_op (op, srcval.a, dst->a, srcalpha.a, dst->a);
-    }
-}
-
-static double
-round_channel (double p, int m)
-{
-    int t;
-    double r;
-
-    t = p * ((1 << m));
-    t -= t >> m;
-
-    r = t / (double)((1 << m) - 1);
-
-    return r;
-}
-
-void
-round_color (pixman_format_code_t format, color_t *color)
-{
-    if (PIXMAN_FORMAT_R (format) == 0)
-    {
-	color->r = 0.0;
-	color->g = 0.0;
-	color->b = 0.0;
-    }
-    else
-    {
-	color->r = round_channel (color->r, PIXMAN_FORMAT_R (format));
-	color->g = round_channel (color->g, PIXMAN_FORMAT_G (format));
-	color->b = round_channel (color->b, PIXMAN_FORMAT_B (format));
-    }
-
-    if (PIXMAN_FORMAT_A (format) == 0)
-	color->a = 1;
-    else
-	color->a = round_channel (color->a, PIXMAN_FORMAT_A (format));
-}
-
-/* The acceptable deviation in units of [0.0, 1.0]
- */
-#define DEVIATION (0.0128)
-
-/* Check whether @pixel is a valid quantization of the a, r, g, b
- * parameters. Some slack is permitted.
- */
-void
-pixel_checker_init (pixel_checker_t *checker, pixman_format_code_t format)
-{
-    assert (PIXMAN_FORMAT_VIS (format));
-
-    checker->format = format;
-
-    if (format == PIXMAN_rgba_float ||
-	format == PIXMAN_rgb_float)
-	return;
-
-    switch (PIXMAN_FORMAT_TYPE (format))
-    {
-    case PIXMAN_TYPE_A:
-	checker->bs = 0;
-	checker->gs = 0;
-	checker->rs = 0;
-	checker->as = 0;
-	break;
-
-    case PIXMAN_TYPE_ARGB:
-    case PIXMAN_TYPE_ARGB_SRGB:
-	checker->bs = 0;
-	checker->gs = checker->bs + PIXMAN_FORMAT_B (format);
-	checker->rs = checker->gs + PIXMAN_FORMAT_G (format);
-	checker->as = checker->rs + PIXMAN_FORMAT_R (format);
-	break;
-
-    case PIXMAN_TYPE_ABGR:
-	checker->rs = 0;
-	checker->gs = checker->rs + PIXMAN_FORMAT_R (format);
-	checker->bs = checker->gs + PIXMAN_FORMAT_G (format);
-	checker->as = checker->bs + PIXMAN_FORMAT_B (format);
-	break;
-
-    case PIXMAN_TYPE_BGRA:
-	/* With BGRA formats we start counting at the high end of the pixel */
-	checker->bs = PIXMAN_FORMAT_BPP (format) - PIXMAN_FORMAT_B (format);
-	checker->gs = checker->bs - PIXMAN_FORMAT_B (format);
-	checker->rs = checker->gs - PIXMAN_FORMAT_G (format);
-	checker->as = checker->rs - PIXMAN_FORMAT_R (format);
-	break;
-
-    case PIXMAN_TYPE_RGBA:
-	/* With BGRA formats we start counting at the high end of the pixel */
-	checker->rs = PIXMAN_FORMAT_BPP (format) - PIXMAN_FORMAT_R (format);
-	checker->gs = checker->rs - PIXMAN_FORMAT_R (format);
-	checker->bs = checker->gs - PIXMAN_FORMAT_G (format);
-	checker->as = checker->bs - PIXMAN_FORMAT_B (format);
-	break;
-
-    default:
-	assert (0);
-	break;
-    }
-
-    checker->am = ((1U << PIXMAN_FORMAT_A (format)) - 1) << checker->as;
-    checker->rm = ((1U << PIXMAN_FORMAT_R (format)) - 1) << checker->rs;
-    checker->gm = ((1U << PIXMAN_FORMAT_G (format)) - 1) << checker->gs;
-    checker->bm = ((1U << PIXMAN_FORMAT_B (format)) - 1) << checker->bs;
-
-    checker->aw = PIXMAN_FORMAT_A (format);
-    checker->rw = PIXMAN_FORMAT_R (format);
-    checker->gw = PIXMAN_FORMAT_G (format);
-    checker->bw = PIXMAN_FORMAT_B (format);
-
-    checker->ad = DEVIATION;
-    checker->rd = DEVIATION;
-    checker->gd = DEVIATION;
-    checker->bd = DEVIATION;
-}
-
-/* When dithering is enabled, we allow one extra pixel of tolerance
- */
-void
-pixel_checker_allow_dither (pixel_checker_t *checker)
-{
-    checker->ad += 1 / (double)((1 << checker->aw) - 1);
-    checker->rd += 1 / (double)((1 << checker->rw) - 1);
-    checker->gd += 1 / (double)((1 << checker->gw) - 1);
-    checker->bd += 1 / (double)((1 << checker->bw) - 1);
-}
-
-static void
-pixel_checker_require_uint32_format (const pixel_checker_t *checker)
-{
-    assert (checker->format != PIXMAN_rgba_float &&
-	    checker->format != PIXMAN_rgb_float);
-}
-
-void
-pixel_checker_split_pixel (const pixel_checker_t *checker, uint32_t pixel,
-			   int *a, int *r, int *g, int *b)
-{
-    pixel_checker_require_uint32_format(checker);
-
-    *a = (pixel & checker->am) >> checker->as;
-    *r = (pixel & checker->rm) >> checker->rs;
-    *g = (pixel & checker->gm) >> checker->gs;
-    *b = (pixel & checker->bm) >> checker->bs;
-}
-
-void
-pixel_checker_get_masks (const pixel_checker_t *checker,
-                         uint32_t              *am,
-                         uint32_t              *rm,
-                         uint32_t              *gm,
-                         uint32_t              *bm)
-{
-    pixel_checker_require_uint32_format(checker);
-
-    if (am)
-        *am = checker->am;
-    if (rm)
-        *rm = checker->rm;
-    if (gm)
-        *gm = checker->gm;
-    if (bm)
-        *bm = checker->bm;
-}
-
-void
-pixel_checker_convert_pixel_to_color (const pixel_checker_t *checker,
-                                      uint32_t pixel, color_t *color)
-{
-    int a, r, g, b;
-
-    pixel_checker_require_uint32_format(checker);
-
-    pixel_checker_split_pixel (checker, pixel, &a, &r, &g, &b);
-
-    if (checker->am == 0)
-        color->a = 1.0;
-    else
-        color->a = a / (double)(checker->am >> checker->as);
-
-    if (checker->rm == 0)
-        color->r = 0.0;
-    else
-        color->r = r / (double)(checker->rm >> checker->rs);
-
-    if (checker->gm == 0)
-        color->g = 0.0;
-    else
-        color->g = g / (double)(checker->gm >> checker->gs);
-
-    if (checker->bm == 0)
-        color->b = 0.0;
-    else
-        color->b = b / (double)(checker->bm >> checker->bs);
-
-    if (PIXMAN_FORMAT_TYPE (checker->format) == PIXMAN_TYPE_ARGB_SRGB)
-    {
-	color->r = convert_srgb_to_linear (color->r);
-	color->g = convert_srgb_to_linear (color->g);
-	color->b = convert_srgb_to_linear (color->b);
-    }
-}
-
-static int32_t
-convert (double v, uint32_t width, uint32_t mask, uint32_t shift, double def)
-{
-    int32_t r;
-
-    if (!mask)
-	v = def;
-
-    r = (v * ((mask >> shift) + 1));
-    r -= r >> width;
-
-    return r;
-}
-
-static void
-get_limits (const pixel_checker_t *checker, double sign,
-	    color_t *color,
-	    int *ao, int *ro, int *go, int *bo)
-{
-    color_t tmp;
-
-    if (PIXMAN_FORMAT_TYPE (checker->format) == PIXMAN_TYPE_ARGB_SRGB)
-    {
-	tmp.a = color->a;
-	tmp.r = convert_linear_to_srgb (color->r);
-	tmp.g = convert_linear_to_srgb (color->g);
-	tmp.b = convert_linear_to_srgb (color->b);
-
-	color = &tmp;
-    }
-    
-    *ao = convert (color->a + sign * checker->ad,
-		   checker->aw, checker->am, checker->as, 1.0);
-    *ro = convert (color->r + sign * checker->rd,
-		   checker->rw, checker->rm, checker->rs, 0.0);
-    *go = convert (color->g + sign * checker->gd,
-		   checker->gw, checker->gm, checker->gs, 0.0);
-    *bo = convert (color->b + sign * checker->bd,
-		   checker->bw, checker->bm, checker->bs, 0.0);
-}
-
-void
-pixel_checker_get_max (const pixel_checker_t *checker, color_t *color,
-		       int *am, int *rm, int *gm, int *bm)
-{
-    pixel_checker_require_uint32_format(checker);
-
-    get_limits (checker, 1, color, am, rm, gm, bm);
-}
-
-void
-pixel_checker_get_min (const pixel_checker_t *checker, color_t *color,
-		       int *am, int *rm, int *gm, int *bm)
-{
-    pixel_checker_require_uint32_format(checker);
-
-    get_limits (checker, - 1, color, am, rm, gm, bm);
-}
-
-pixman_bool_t
-pixel_checker_check (const pixel_checker_t *checker, uint32_t pixel,
-		     color_t *color)
-{
-    int32_t a_lo, a_hi, r_lo, r_hi, g_lo, g_hi, b_lo, b_hi;
-    int32_t ai, ri, gi, bi;
-    pixman_bool_t result;
-
-    pixel_checker_require_uint32_format(checker);
-
-    pixel_checker_get_min (checker, color, &a_lo, &r_lo, &g_lo, &b_lo);
-    pixel_checker_get_max (checker, color, &a_hi, &r_hi, &g_hi, &b_hi);
-    pixel_checker_split_pixel (checker, pixel, &ai, &ri, &gi, &bi);
-
-    result =
-	a_lo <= ai && ai <= a_hi	&&
-	r_lo <= ri && ri <= r_hi	&&
-	g_lo <= gi && gi <= g_hi	&&
-	b_lo <= bi && bi <= b_hi;
-
-    return result;
-}
-
-static void
-color_limits (const pixel_checker_t *checker,
-	      double limit, const color_t *color, color_t *out)
-{
-    if (PIXMAN_FORMAT_A(checker->format))
-	out->a = color->a + limit;
-    else
-	out->a = 1.;
-
-    out->r = color->r + limit;
-    out->g = color->g + limit;
-    out->b = color->b + limit;
-}
-
-pixman_bool_t
-pixel_checker_check_color (const pixel_checker_t *checker,
-			   const color_t *actual, const color_t *reference)
-{
-    color_t min, max;
-    pixman_bool_t result;
-
-    color_limits(checker, -DEVIATION, reference, &min);
-    color_limits(checker, DEVIATION, reference, &max);
-
-    result =
-	actual->a >= min.a && actual->a <= max.a &&
-	actual->r >= min.r && actual->r <= max.r &&
-	actual->g >= min.g && actual->g <= max.g &&
-	actual->b >= min.b && actual->b <= max.b;
-
-    return result;
-}