1 files changed, 49 insertions, 0 deletions
diff --git a/pixman/test/alphamap.c b/pixman/test/alphamap.c
new file mode 100644
index 000000000..e6a25efcb
--- /dev/null
+++ b/pixman/test/alphamap.c
@@ -0,0 +1,49 @@
+#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;
+}