test/scaling-test.c - third_party/pixman - Git at Google

 /*
  * 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 "utils.h"

 #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;

     default:
         break;
     }
     pixman_image_set_repeat (src_img, repeat);

     if (lcg_rand_n (2))
 	pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
     else
 	pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);

     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 == 0x2168ACD1)
 	    {
 		printf ("scaling test passed\n");
 	    }
 	    else
 	    {
 		printf ("scaling test failed!\n");
 		return 1;
 	    }
 	}
     }

     return 0;
 }
	/*
	* 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 "utils.h"

	#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;

	default:
	break;
	}
	pixman_image_set_repeat (src_img, repeat);

	if (lcg_rand_n (2))
	pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
	else
	pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);

	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 == 0x2168ACD1)
	{
	printf ("scaling test passed\n");
	}
	else
	{
	printf ("scaling test failed!\n");
	return 1;
	}
	}
	}

	return 0;
	}