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-rw-r--r--pixman/test/alphamap.c144
-rw-r--r--pixman/test/composite.c332
-rw-r--r--pixman/test/utils.c175
-rw-r--r--pixman/test/utils.h35
4 files changed, 419 insertions, 267 deletions
diff --git a/pixman/test/alphamap.c b/pixman/test/alphamap.c
index 24a350ed7..0c5757ea3 100644
--- a/pixman/test/alphamap.c
+++ b/pixman/test/alphamap.c
@@ -2,8 +2,8 @@
#include <stdlib.h>
#include "utils.h"
-#define WIDTH 100
-#define HEIGHT 100
+#define WIDTH 48
+#define HEIGHT 48
static const pixman_format_code_t formats[] =
{
@@ -70,24 +70,6 @@ make_image (pixman_format_code_t format)
return image;
}
-static pixman_image_t *
-create_image (pixman_format_code_t format, pixman_format_code_t alpha_format,
- int alpha_origin_x, int alpha_origin_y)
-{
- pixman_image_t *image = make_image (format);
-
- if (alpha_format != PIXMAN_null)
- {
- pixman_image_t *alpha = make_image (alpha_format);
-
- pixman_image_set_alpha_map (image, alpha,
- alpha_origin_x, alpha_origin_y);
- pixman_image_unref (alpha);
- }
-
- return image;
-}
-
static uint8_t
get_alpha (pixman_image_t *image, int x, int y, int orig_x, int orig_y)
{
@@ -139,6 +121,45 @@ get_alpha (pixman_image_t *image, int x, int y, int orig_x, int orig_y)
return r;
}
+static uint16_t
+get_red (pixman_image_t *image, int x, int y, int orig_x, int orig_y)
+{
+ uint8_t *bits;
+ uint16_t r;
+
+ bits = (uint8_t *)image->bits.bits;
+
+ if (image->bits.format == PIXMAN_a8)
+ {
+ r = 0x00;
+ }
+ else if (image->bits.format == PIXMAN_a2r10g10b10)
+ {
+ r = ((uint32_t *)bits)[y * WIDTH + x] >> 14;
+ r &= 0xffc0;
+ r |= (r >> 10);
+ }
+ else if (image->bits.format == PIXMAN_a8r8g8b8)
+ {
+ r = ((uint32_t *)bits)[y * WIDTH + x] >> 16;
+ r &= 0xff;
+ r |= r << 8;
+ }
+ else if (image->bits.format == PIXMAN_a4r4g4b4)
+ {
+ r = ((uint16_t *)bits)[y * WIDTH + x] >> 8;
+ r &= 0xf;
+ r |= r << 4;
+ r |= r << 8;
+ }
+ else
+ {
+ assert (0);
+ }
+
+ return r;
+}
+
static int
run_test (int s, int d, int sa, int da, int soff, int doff)
{
@@ -146,10 +167,10 @@ run_test (int s, int d, int sa, int da, int soff, int doff)
pixman_format_code_t df = formats[d];
pixman_format_code_t saf = alpha_formats[sa];
pixman_format_code_t daf = alpha_formats[da];
- pixman_image_t *src, *dst, *orig_dst;
+ pixman_image_t *src, *dst, *orig_dst, *alpha, *orig_alpha;
pixman_transform_t t1;
int j, k;
- int n_alpha_bits;
+ int n_alpha_bits, n_red_bits;
soff = origins[soff];
doff = origins[doff];
@@ -158,10 +179,37 @@ run_test (int s, int d, int sa, int da, int soff, int doff)
if (daf != PIXMAN_null)
n_alpha_bits = PIXMAN_FORMAT_A (daf);
+ n_red_bits = PIXMAN_FORMAT_R (df);
+
+ /* Source */
+ src = make_image (sf);
+ if (saf != PIXMAN_null)
+ {
+ alpha = make_image (saf);
+ pixman_image_set_alpha_map (src, alpha, soff, soff);
+ pixman_image_unref (alpha);
+ }
+
+ /* Destination */
+ orig_dst = make_image (df);
+ dst = make_image (df);
+ pixman_image_composite (PIXMAN_OP_SRC, orig_dst, NULL, dst,
+ 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+ if (daf != PIXMAN_null)
+ {
+ orig_alpha = make_image (daf);
+ alpha = make_image (daf);
+
+ pixman_image_composite (PIXMAN_OP_SRC, orig_alpha, NULL, alpha,
+ 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
- src = create_image (sf, saf, soff, soff);
- orig_dst = create_image (df, daf, doff, doff);
- dst = create_image (df, daf, doff, doff);
+ pixman_image_set_alpha_map (orig_dst, orig_alpha, doff, doff);
+ pixman_image_set_alpha_map (dst, alpha, doff, doff);
+
+ pixman_image_unref (orig_alpha);
+ pixman_image_unref (alpha);
+ }
/* Transformations, repeats and filters on destinations should be ignored,
* so just set some random ones.
@@ -175,9 +223,6 @@ run_test (int s, int d, int sa, int da, int soff, int doff)
pixman_image_set_filter (dst, PIXMAN_FILTER_BILINEAR, NULL, 0);
pixman_image_set_repeat (dst, PIXMAN_REPEAT_REFLECT);
- pixman_image_composite (PIXMAN_OP_SRC, orig_dst, NULL, dst,
- 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
-
pixman_image_composite (PIXMAN_OP_ADD, src, NULL, dst,
0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
@@ -185,21 +230,22 @@ run_test (int s, int d, int sa, int da, int soff, int doff)
{
for (k = MAX (doff, 0); k < MIN (WIDTH, WIDTH + doff); ++k)
{
- uint8_t sa, da, oda, ref;
+ uint8_t sa, da, oda, refa;
+ uint16_t sr, dr, odr, refr;
sa = get_alpha (src, k, j, soff, soff);
da = get_alpha (dst, k, j, doff, doff);
oda = get_alpha (orig_dst, k, j, doff, doff);
if (sa + oda > 255)
- ref = 255;
+ refa = 255;
else
- ref = sa + oda;
+ refa = sa + oda;
- if (da >> (8 - n_alpha_bits) != ref >> (8 - n_alpha_bits))
+ if (da >> (8 - n_alpha_bits) != refa >> (8 - n_alpha_bits))
{
printf ("\nWrong alpha value at (%d, %d). Should be 0x%x; got 0x%x. Source was 0x%x, original dest was 0x%x\n",
- k, j, ref, da, sa, oda);
+ k, j, refa, da, sa, oda);
printf ("src: %s, alpha: %s, origin %d %d\ndst: %s, alpha: %s, origin: %d %d\n\n",
format_name (sf),
@@ -210,6 +256,38 @@ run_test (int s, int d, int sa, int da, int soff, int doff)
doff, doff);
return 1;
}
+
+ /* There are cases where we go through the 8 bit compositing
+ * path even with 10bpc formats. This results in incorrect
+ * results here, so only do the red check for narrow formats
+ */
+ if (n_red_bits <= 8)
+ {
+ sr = get_red (src, k, j, soff, soff);
+ dr = get_red (dst, k, j, doff, doff);
+ odr = get_red (orig_dst, k, j, doff, doff);
+
+ if (sr + odr > 0xffff)
+ refr = 0xffff;
+ else
+ refr = sr + odr;
+
+ if (abs ((dr >> (16 - n_red_bits)) - (refr >> (16 - n_red_bits))) > 1)
+ {
+ printf ("%d red bits\n", n_red_bits);
+ printf ("\nWrong red value at (%d, %d). Should be 0x%x; got 0x%x. Source was 0x%x, original dest was 0x%x\n",
+ k, j, refr, dr, sr, odr);
+
+ printf ("src: %s, alpha: %s, origin %d %d\ndst: %s, alpha: %s, origin: %d %d\n\n",
+ format_name (sf),
+ format_name (saf),
+ soff, soff,
+ format_name (df),
+ format_name (daf),
+ doff, doff);
+ return 1;
+ }
+ }
}
}
diff --git a/pixman/test/composite.c b/pixman/test/composite.c
index fe59eae3c..48bde9c7d 100644
--- a/pixman/test/composite.c
+++ b/pixman/test/composite.c
@@ -28,16 +28,10 @@
#include <time.h>
#include "utils.h"
-typedef struct color_t color_t;
typedef struct format_t format_t;
typedef struct image_t image_t;
typedef struct operator_t operator_t;
-struct color_t
-{
- double r, g, b, a;
-};
-
struct format_t
{
pixman_format_code_t format;
@@ -480,147 +474,19 @@ do_composite (pixman_op_t op,
result->a = calc_op (op, srcval.a, dst->a, srcalpha.a, dst->a);
}
-static void
-color_correct (pixman_format_code_t format,
- color_t *color)
+static uint32_t
+get_value (pixman_image_t *image)
{
-#define MASK(x) ((1 << (x)) - 1)
-#define round_pix(pix, m) \
- ((int)((pix) * (MASK(m)) + .5) / (double) (MASK(m)))
-
- if (PIXMAN_FORMAT_R (format) == 0)
- {
- color->r = 0.0;
- color->g = 0.0;
- color->b = 0.0;
- }
- else
- {
- color->r = round_pix (color->r, PIXMAN_FORMAT_R (format));
- color->g = round_pix (color->g, PIXMAN_FORMAT_G (format));
- color->b = round_pix (color->b, PIXMAN_FORMAT_B (format));
- }
-
- if (PIXMAN_FORMAT_A (format) == 0)
- color->a = 1.0;
- else
- color->a = round_pix (color->a, PIXMAN_FORMAT_A (format));
+ uint32_t value = *(uint32_t *)pixman_image_get_data (image);
-#undef round_pix
-#undef MASK
-}
-
-static void
-get_pixel (pixman_image_t *image,
- pixman_format_code_t format,
- color_t *color)
-{
-#define MASK(N) ((1UL << (N))-1)
-
- unsigned long rs, gs, bs, as;
- int a, r, g, b;
- unsigned long val;
-
- val = *(unsigned long *) pixman_image_get_data (image);
#ifdef WORDS_BIGENDIAN
- val >>= 8 * sizeof(val) - PIXMAN_FORMAT_BPP (format);
-#endif
-
- /* Number of bits in each channel */
- a = PIXMAN_FORMAT_A (format);
- r = PIXMAN_FORMAT_R (format);
- g = PIXMAN_FORMAT_G (format);
- b = PIXMAN_FORMAT_B (format);
-
- switch (PIXMAN_FORMAT_TYPE (format))
{
- case PIXMAN_TYPE_ARGB:
- bs = 0;
- gs = b + bs;
- rs = g + gs;
- as = r + rs;
- break;
-
- case PIXMAN_TYPE_ABGR:
- rs = 0;
- gs = r + rs;
- bs = g + gs;
- as = b + bs;
- break;
-
- case PIXMAN_TYPE_BGRA:
- as = 0;
- rs = PIXMAN_FORMAT_BPP (format) - (b + g + r);
- gs = r + rs;
- bs = g + gs;
- break;
-
- case PIXMAN_TYPE_RGBA:
- as = 0;
- bs = PIXMAN_FORMAT_BPP (format) - (b + g + r);
- gs = b + bs;
- rs = g + gs;
- break;
-
- case PIXMAN_TYPE_A:
- as = 0;
- rs = 0;
- gs = 0;
- bs = 0;
- break;
-
- case PIXMAN_TYPE_OTHER:
- case PIXMAN_TYPE_COLOR:
- case PIXMAN_TYPE_GRAY:
- case PIXMAN_TYPE_YUY2:
- case PIXMAN_TYPE_YV12:
- default:
- abort ();
- as = 0;
- rs = 0;
- gs = 0;
- bs = 0;
- break;
- }
-
- if (MASK (a) != 0)
- color->a = ((val >> as) & MASK (a)) / (double) MASK (a);
- else
- color->a = 1.0;
-
- if (MASK (r) != 0)
- {
- color->r = ((val >> rs) & MASK (r)) / (double) MASK (r);
- color->g = ((val >> gs) & MASK (g)) / (double) MASK (g);
- color->b = ((val >> bs) & MASK (b)) / (double) MASK (b);
+ pixman_format_code_t format = pixman_image_get_format (image);
+ value >>= 8 * sizeof(value) - PIXMAN_FORMAT_BPP (format);
}
- else
- {
- color->r = 0.0;
- color->g = 0.0;
- color->b = 0.0;
- }
-
-#undef MASK
-}
-
-static double
-eval_diff (color_t *expected, color_t *test, pixman_format_code_t format)
-{
- double rscale, gscale, bscale, ascale;
- double rdiff, gdiff, bdiff, adiff;
-
- rscale = 1.0 * ((1 << PIXMAN_FORMAT_R (format)) - 1);
- gscale = 1.0 * ((1 << PIXMAN_FORMAT_G (format)) - 1);
- bscale = 1.0 * ((1 << PIXMAN_FORMAT_B (format)) - 1);
- ascale = 1.0 * ((1 << PIXMAN_FORMAT_A (format)) - 1);
-
- rdiff = fabs (test->r - expected->r) * rscale;
- bdiff = fabs (test->g - expected->g) * gscale;
- gdiff = fabs (test->b - expected->b) * bscale;
- adiff = fabs (test->a - expected->a) * ascale;
+#endif
- return MAX (MAX (MAX (rdiff, gdiff), bdiff), adiff);
+ return value;
}
static char *
@@ -628,10 +494,10 @@ describe_image (image_t *info, char *buf)
{
if (info->size)
{
- sprintf (buf, "%s %dx%d%s",
+ sprintf (buf, "%s, %dx%d%s",
info->format->name,
info->size, info->size,
- info->repeat ? "R" :"");
+ info->repeat ? " R" :"");
}
else
{
@@ -641,52 +507,40 @@ describe_image (image_t *info, char *buf)
return buf;
}
-/* Test a composite of a given operation, source, mask, and destination
- * picture.
- * Fills the window, and samples from the 0,0 pixel corner.
- */
+static char *
+describe_color (const color_t *color, char *buf)
+{
+ sprintf (buf, "%.3f %.3f %.3f %.3f",
+ color->r, color->g, color->b, color->a);
+
+ return buf;
+}
+
static pixman_bool_t
composite_test (image_t *dst,
const operator_t *op,
image_t *src,
image_t *mask,
- pixman_bool_t component_alpha)
+ pixman_bool_t component_alpha,
+ int testno)
{
pixman_color_t fill;
pixman_rectangle16_t rect;
- color_t expected, result, tdst, tsrc, tmsk;
- double diff;
- pixman_bool_t success = TRUE;
+ color_t expected, tdst, tsrc, tmsk;
+ pixel_checker_t checker;
+ /* Initialize dst */
compute_pixman_color (dst->color, &fill);
rect.x = rect.y = 0;
rect.width = rect.height = dst->size;
- pixman_image_fill_rectangles (PIXMAN_OP_SRC, dst->image,
- &fill, 1, &rect);
+ pixman_image_fill_rectangles (PIXMAN_OP_SRC, dst->image, &fill, 1, &rect);
- if (mask != NULL)
+ if (mask)
{
pixman_image_set_component_alpha (mask->image, component_alpha);
- pixman_image_composite (op->op, src->image, mask->image, dst->image,
- 0, 0,
- 0, 0,
- 0, 0,
- dst->size, dst->size);
- tmsk = *mask->color;
- if (mask->size)
- {
- color_correct (mask->format->format, &tmsk);
-
- if (component_alpha &&
- PIXMAN_FORMAT_R (mask->format->format) == 0)
- {
- /* Ax component-alpha masks expand alpha into
- * all color channels.
- */
- tmsk.r = tmsk.g = tmsk.b = tmsk.a;
- }
- }
+ pixman_image_composite (op->op, src->image, mask->image, dst->image,
+ 0, 0, 0, 0, 0, 0, dst->size, dst->size);
}
else
{
@@ -696,71 +550,81 @@ composite_test (image_t *dst,
0, 0,
dst->size, dst->size);
}
- get_pixel (dst->image, dst->format->format, &result);
tdst = *dst->color;
- color_correct (dst->format->format, &tdst);
+ round_color (dst->format->format, &tdst);
+
tsrc = *src->color;
if (src->size)
- color_correct (src->format->format, &tsrc);
- do_composite (op->op, &tsrc, mask ? &tmsk : NULL, &tdst,
- &expected, component_alpha);
- color_correct (dst->format->format, &expected);
-
- diff = eval_diff (&expected, &result, dst->format->format);
-
- /* FIXME: We should find out what deviation is acceptable. 3.0
- * is clearly absurd for 2 bit formats for example. On the other
- * hand currently 1.0 does not work.
- */
- if (diff > 3.0)
+ round_color (src->format->format, &tsrc);
+
+ if (mask)
{
- char buf[40];
+ tmsk = *mask->color;
+ if (mask->size)
+ round_color (mask->format->format, &tmsk);
+ if (component_alpha && PIXMAN_FORMAT_R (mask->format->format) == 0)
+ {
+ /* Ax component-alpha masks expand alpha into
+ * all color channels.
+ */
+ tmsk.r = tmsk.g = tmsk.b = tmsk.a;
+ }
+ }
- sprintf (buf, "%s %scomposite",
- op->name,
- component_alpha ? "CA " : "");
+ do_composite (op->op,
+ &tsrc,
+ mask? &tmsk : NULL,
+ &tdst,
+ &expected,
+ component_alpha);
- printf ("%s test error of %.4f --\n"
- " R G B A\n"
- "got: %.2f %.2f %.2f %.2f [%08lx]\n"
- "expected: %.2f %.2f %.2f %.2f\n",
- buf, diff,
- result.r, result.g, result.b, result.a,
- *(unsigned long *) pixman_image_get_data (dst->image),
- expected.r, expected.g, expected.b, expected.a);
+ pixel_checker_init (&checker, dst->format->format);
+ if (!pixel_checker_check (&checker, get_value (dst->image), &expected))
+ {
+ char buf[40], buf2[40];
+ int a, r, g, b;
+ uint32_t pixel;
+
+ printf ("---- Test %d failed ----\n", testno);
+ printf ("Operator: %s %s\n",
+ op->name, component_alpha ? "CA" : "");
+
+ printf ("Source: %s\n", describe_image (src, buf));
if (mask != NULL)
+ printf ("Mask: %s\n", describe_image (mask, buf));
+
+ printf ("Destination: %s\n\n", describe_image (dst, buf));
+ printf (" R G B A Rounded\n");
+ printf ("Source color: %s %s\n",
+ describe_color (src->color, buf),
+ describe_color (&tsrc, buf2));
+ if (mask)
{
- printf ("src color: %.2f %.2f %.2f %.2f\n"
- "msk color: %.2f %.2f %.2f %.2f\n"
- "dst color: %.2f %.2f %.2f %.2f\n",
- src->color->r, src->color->g,
- src->color->b, src->color->a,
- mask->color->r, mask->color->g,
- mask->color->b, mask->color->a,
- dst->color->r, dst->color->g,
- dst->color->b, dst->color->a);
- printf ("src: %s, ", describe_image (src, buf));
- printf ("mask: %s, ", describe_image (mask, buf));
- printf ("dst: %s\n\n", describe_image (dst, buf));
- }
- else
- {
- printf ("src color: %.2f %.2f %.2f %.2f\n"
- "dst color: %.2f %.2f %.2f %.2f\n",
- src->color->r, src->color->g,
- src->color->b, src->color->a,
- dst->color->r, dst->color->g,
- dst->color->b, dst->color->a);
- printf ("src: %s, ", describe_image (src, buf));
- printf ("dst: %s\n\n", describe_image (dst, buf));
+ printf ("Mask color: %s %s\n",
+ describe_color (mask->color, buf),
+ describe_color (&tmsk, buf2));
}
+ printf ("Dest. color: %s %s\n",
+ describe_color (dst->color, buf),
+ describe_color (&tdst, buf2));
- success = FALSE;
- }
+ pixel = get_value (dst->image);
+
+ printf ("Expected: %s\n", describe_color (&expected, buf));
- return success;
+ pixel_checker_split_pixel (&checker, pixel, &a, &r, &g, &b);
+
+ printf ("Got: %5d %5d %5d %5d [pixel: 0x%08x]\n", r, g, b, a, pixel);
+ pixel_checker_get_min (&checker, &expected, &a, &r, &g, &b);
+ printf ("Min accepted: %5d %5d %5d %5d\n", r, g, b, a);
+ pixel_checker_get_max (&checker, &expected, &a, &r, &g, &b);
+ printf ("Max accepted: %5d %5d %5d %5d\n", r, g, b, a);
+
+ return FALSE;
+ }
+ return TRUE;
}
static void
@@ -791,7 +655,7 @@ image_init (image_t *info,
pixman_image_fill_rectangles (PIXMAN_OP_SRC, info->image, &fill,
1, &rect);
- if (size & REPEAT)
+ if (sizes[size] & REPEAT)
{
pixman_image_set_repeat (info->image, PIXMAN_REPEAT_NORMAL);
info->repeat = PIXMAN_REPEAT_NORMAL;
@@ -836,7 +700,7 @@ run_test (uint32_t seed)
int ok;
lcg_srand (seed);
-
+
image_init (&dst, random_color(), random_format(), 1);
image_init (&src, random_color(), random_format(), random_size());
image_init (&mask, random_color(), random_format(), random_size());
@@ -848,14 +712,14 @@ run_test (uint32_t seed)
switch (ca)
{
case 0:
- ok = composite_test (&dst, op, &src, NULL, FALSE);
+ ok = composite_test (&dst, op, &src, NULL, FALSE, seed);
break;
case 1:
- ok = composite_test (&dst, op, &src, &mask, FALSE);
+ ok = composite_test (&dst, op, &src, &mask, FALSE, seed);
break;
case 2:
ok = composite_test (&dst, op, &src, &mask,
- mask.size? TRUE : FALSE);
+ mask.size? TRUE : FALSE, seed);
break;
default:
ok = FALSE;
@@ -879,7 +743,7 @@ main (int argc, char **argv)
if (argc > 1)
{
char *end;
-
+
i = strtol (argv[1], &end, 0);
if (end != argv[1])
@@ -900,7 +764,7 @@ main (int argc, char **argv)
seed = get_random_seed();
else
seed = 1;
-
+
#ifdef USE_OPENMP
# pragma omp parallel for default(none) shared(result, argv, seed)
#endif
@@ -909,10 +773,10 @@ main (int argc, char **argv)
if (!result && !run_test (i + seed))
{
printf ("Test 0x%08X failed.\n", seed + i);
-
+
result = seed + i;
}
}
-
+
return result;
}
diff --git a/pixman/test/utils.c b/pixman/test/utils.c
index 204066f9b..379bd71a8 100644
--- a/pixman/test/utils.c
+++ b/pixman/test/utils.c
@@ -703,3 +703,178 @@ initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb)
assert (palette->ent[CONVERT_15 (palette->rgba[i], is_rgb)] == i);
}
}
+
+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));
+}
+
+/* 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;
+
+ 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:
+ 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 = ((1 << PIXMAN_FORMAT_A (format)) - 1) << checker->as;
+ checker->rm = ((1 << PIXMAN_FORMAT_R (format)) - 1) << checker->rs;
+ checker->gm = ((1 << PIXMAN_FORMAT_G (format)) - 1) << checker->gs;
+ checker->bm = ((1 << 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);
+}
+
+void
+pixel_checker_split_pixel (const pixel_checker_t *checker, uint32_t pixel,
+ int *a, int *r, int *g, int *b)
+{
+ *a = (pixel & checker->am) >> checker->as;
+ *r = (pixel & checker->rm) >> checker->rs;
+ *g = (pixel & checker->gm) >> checker->gs;
+ *b = (pixel & checker->bm) >> checker->bs;
+}
+
+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 limit,
+ color_t *color,
+ int *ao, int *ro, int *go, int *bo)
+{
+ *ao = convert (color->a + limit, checker->aw, checker->am, checker->as, 1.0);
+ *ro = convert (color->r + limit, checker->rw, checker->rm, checker->rs, 0.0);
+ *go = convert (color->g + limit, checker->gw, checker->gm, checker->gs, 0.0);
+ *bo = convert (color->b + limit, checker->bw, checker->bm, checker->bs, 0.0);
+}
+
+/* The acceptable deviation in units of [0.0, 1.0]
+ */
+#define DEVIATION (0.004)
+
+void
+pixel_checker_get_max (const pixel_checker_t *checker, color_t *color,
+ int *am, int *rm, int *gm, int *bm)
+{
+ get_limits (checker, DEVIATION, 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)
+{
+ get_limits (checker, - DEVIATION, 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_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;
+}
diff --git a/pixman/test/utils.h b/pixman/test/utils.h
index 3bff78e76..3c0647bc6 100644
--- a/pixman/test/utils.h
+++ b/pixman/test/utils.h
@@ -151,3 +151,38 @@ aligned_malloc (size_t align, size_t size);
void
initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb);
+
+typedef struct
+{
+ double r, g, b, a;
+} color_t;
+
+void
+round_color (pixman_format_code_t format, color_t *color);
+
+typedef struct
+{
+ pixman_format_code_t format;
+ uint32_t am, rm, gm, bm;
+ uint32_t as, rs, gs, bs;
+ uint32_t aw, rw, gw, bw;
+} pixel_checker_t;
+
+void
+pixel_checker_init (pixel_checker_t *checker, pixman_format_code_t format);
+
+void
+pixel_checker_split_pixel (const pixel_checker_t *checker, uint32_t pixel,
+ int *a, int *r, int *g, int *b);
+
+void
+pixel_checker_get_max (const pixel_checker_t *checker, color_t *color,
+ int *a, int *r, int *g, int *b);
+
+void
+pixel_checker_get_min (const pixel_checker_t *checker, color_t *color,
+ int *a, int *r, int *g, int *b);
+
+pixman_bool_t
+pixel_checker_check (const pixel_checker_t *checker,
+ uint32_t pixel, color_t *color);