pixman git update 21/9/2010

1 files changed, 240 insertions, 49 deletions

diff --git a/pixman/test/alphamap.c b/pixman/test/alphamap.c
index e6a25efcb..eb7a330f9 100644
--- a/pixman/test/alphamap.c
+++ b/pixman/test/alphamap.c
@@ -1,49 +1,240 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include "utils.h"
-
-#define WIDTH 400
-#define HEIGHT 200
-
-int
-main (int argc, char **argv)
-{
-    uint8_t *alpha = make_random_bytes (WIDTH * HEIGHT);
-    uint32_t *src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
-    uint32_t *dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
-    int i;
-
-    pixman_image_t *a = pixman_image_create_bits (PIXMAN_a8, WIDTH, HEIGHT, (uint32_t *)alpha, WIDTH);
-    pixman_image_t *d = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
-
-    for (i = 0; i < 2; ++i)
-    {
-	pixman_format_code_t sformat = (i == 0)? PIXMAN_a8r8g8b8 : PIXMAN_a2r10g10b10;
-	pixman_image_t *s = pixman_image_create_bits (sformat, WIDTH, HEIGHT, src, WIDTH * 4);
-	int j, k;
-
-	pixman_image_set_alpha_map (s, a, 0, 0);
-
-	pixman_image_composite (PIXMAN_OP_SRC, s, NULL, d, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
-
-	for (j = 0; j < HEIGHT; ++j)
-	{
-	    for (k = 0; k < WIDTH; ++k)
-	    {
-		uint8_t ap = ((uint8_t *)alpha)[j * WIDTH + k];
-		uint32_t dap = (dest[j * WIDTH + k] >> 24);
-		uint32_t sap = (src[j * WIDTH + k] >> 24);
-
-		if (ap != dap)
-		{
-		    printf ("Wrong alpha value at (%d, %d). Should be %d; got %d (src was %d)\n", k, j, ap, dap, sap);
-		    return 1;
-		}
-	    }
-	}
-
-	pixman_image_unref (s);
-    }
-
-    return 0;
-}
+#include <stdio.h>

+#include <stdlib.h>

+#include "utils.h"

+

+#define WIDTH 100

+#define HEIGHT 100

+

+static const pixman_format_code_t formats[] =

+{

+    PIXMAN_a8r8g8b8,

+    PIXMAN_a2r10g10b10,

+    PIXMAN_a4r4g4b4,

+    PIXMAN_a8

+};

+

+static const pixman_format_code_t alpha_formats[] =

+{

+    PIXMAN_null,

+    PIXMAN_a8,

+    PIXMAN_a2r10g10b10,

+    PIXMAN_a4r4g4b4

+};

+

+static const int origins[] =

+{

+    0, 10, -100

+};

+

+static const char *

+format_name (pixman_format_code_t format)

+{

+    if (format == PIXMAN_a8)

+	return "a8";

+    else if (format == PIXMAN_a2r10g10b10)

+	return "a2r10g10b10";

+    else if (format == PIXMAN_a8r8g8b8)

+	return "a8r8g8b8";

+    else if (format == PIXMAN_a4r4g4b4)

+	return "a4r4g4b4";

+    else if (format == PIXMAN_null)

+	return "none";

+    else

+	assert (0);

+

+    return "<unknown - bug in alphamap.c>";

+}

+

+static pixman_image_t *

+make_image (pixman_format_code_t format)

+{

+    uint32_t *bits;

+    uint8_t bpp = PIXMAN_FORMAT_BPP (format) / 8;

+

+    bits = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * bpp);

+

+    return pixman_image_create_bits (format, WIDTH, HEIGHT, bits, WIDTH * bpp);

+}

+

+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);

+    }

+

+    return image;

+}

+

+static uint8_t

+get_alpha (pixman_image_t *image, int x, int y, int orig_x, int orig_y)

+{

+    uint8_t *bits;

+    uint8_t r;

+

+    if (image->common.alpha_map)

+    {

+	if (x - orig_x >= 0 && x - orig_x < WIDTH &&

+	    y - orig_y >= 0 && y - orig_y < HEIGHT)

+	{

+	    image = (pixman_image_t *)image->common.alpha_map;

+

+	    x -= orig_x;

+	    y -= orig_y;

+	}

+	else

+	{

+	    return 0;

+	}

+    }

+

+    bits = (uint8_t *)image->bits.bits;

+

+    if (image->bits.format == PIXMAN_a8)

+    {

+	r = bits[y * WIDTH + x];

+    }

+    else if (image->bits.format == PIXMAN_a2r10g10b10)

+    {

+	r = ((uint32_t *)bits)[y * WIDTH + x] >> 30;

+	r |= r << 2;

+	r |= r << 4;

+    }

+    else if (image->bits.format == PIXMAN_a8r8g8b8)

+    {

+	r = ((uint32_t *)bits)[y * WIDTH + x] >> 24;

+    }

+    else if (image->bits.format == PIXMAN_a4r4g4b4)

+    {

+	r = ((uint16_t *)bits)[y * WIDTH + x] >> 12;

+	r |= r << 4;

+    }

+    else

+    {

+	assert (0);

+    }

+

+    return r;

+}

+

+#define ARRAY_LENGTH(A) ((int) (sizeof (A) / sizeof ((A) [0])))

+

+static int

+run_test (int s, int d, int sa, int da, int soff, int doff)

+{

+    pixman_format_code_t sf = formats[s];

+    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_transform_t t1;

+    int j, k;

+    int n_alpha_bits;

+

+    soff = origins[soff];

+    doff = origins[doff];

+

+    n_alpha_bits = PIXMAN_FORMAT_A (df);

+    if (daf != PIXMAN_null)

+	n_alpha_bits = PIXMAN_FORMAT_A (daf);

+

+

+    src = create_image (sf, saf, soff, soff);

+    orig_dst = create_image (df, daf, doff, doff);

+    dst = create_image (df, daf, doff, doff);

+

+    /* Transformations on destinations should be ignored, so just set some

+     * random one.

+     */

+    pixman_transform_init_identity (&t1);

+    pixman_transform_scale (&t1, NULL, pixman_int_to_fixed (100), pixman_int_to_fixed (11));

+    pixman_transform_rotate (&t1, NULL, pixman_double_to_fixed (0.5), pixman_double_to_fixed (0.11));

+    pixman_transform_translate (&t1, NULL, pixman_int_to_fixed (11), pixman_int_to_fixed (17));

+

+#if 0

+    /* Unfortunately, this is actually broken at the moment, so we can't

+     * actually turn it on

+     */

+    pixman_image_set_transform (dst, &t1);

+#endif

+

+    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);

+

+    for (j = MAX (doff, 0); j < MIN (HEIGHT, HEIGHT + doff); ++j)

+    {

+	for (k = MAX (doff, 0); k < MIN (WIDTH, WIDTH + doff); ++k)

+	{

+	    uint8_t sa, da, oda, ref;

+

+	    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;

+	    else

+		ref = sa + oda;

+

+	    if (da >> (8 - n_alpha_bits) != ref >> (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);

+

+		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;

+	    }

+	}

+    }

+

+    pixman_image_unref (src);

+    pixman_image_unref (dst);

+    pixman_image_unref (orig_dst);

+

+    return 0;

+}

+

+int

+main (int argc, char **argv)

+{

+    int i, j, a, b, x, y;

+

+    for (i = 0; i < ARRAY_LENGTH (formats); ++i)

+    {

+	for (j = 0; j < ARRAY_LENGTH (formats); ++j)

+	{

+	    for (a = 0; a < ARRAY_LENGTH (alpha_formats); ++a)

+	    {

+		for (b = 0; b < ARRAY_LENGTH (alpha_formats); ++b)

+		{

+		    for (x = 0; x < ARRAY_LENGTH (origins); ++x)

+		    {

+			for (y = 0; y < ARRAY_LENGTH (origins); ++y)

+			{

+			    if (run_test (i, j, a, b, x, y) != 0)

+				return 1;

+			}

+		    }

+		}

+	    }

+	}

+    }

+

+    return 0;

+}