From 1030dc837b10a03a02a85d5504cbeec168ce49e2 Mon Sep 17 00:00:00 2001
From: Bernie Innocenti <bernie@codewiz.org>
Date: Mon, 03 May 2010 21:53:47 +0000
Subject: Import XaoS r489 (trunk after version 3.5)

---
(limited to 'src/engine/stard.c')

diff --git a/src/engine/stard.c b/src/engine/stard.c
new file mode 100644
index 0000000..e6e58bc
--- /dev/null
+++ b/src/engine/stard.c
@@ -0,0 +1,31 @@
+#ifndef UNSUPPORTED
+static void do_starfield(void *data, struct taskinfo *task, int r1, int r2)
+{
+    struct filter *f = (struct filter *) data;
+    cpixel_t *dest;
+    pixel8_t *src, *srcend;
+    unsigned int color;
+    int y;
+    cpixeldata_t black = (cpixeldata_t) f->image->palette->pixels[0];
+    mysrandom((unsigned int) rand());
+    for (y = r1; y < r2; y++) {
+	src = f->childimage->currlines[y];
+	srcend = f->childimage->currlines[y] + f->childimage->width;
+	dest = (cpixel_t *) f->image->currlines[y];
+	while (src < srcend) {
+	    color = ((unsigned int) myrandom() >> 7) & 15;
+	    if (!*src
+		|| (unsigned int) *src * (unsigned int) *src *
+		(unsigned int) *src >
+		(unsigned int) ((unsigned int) myrandom() & (0xffffff))) {
+		p_set(dest,
+		      (cpixeldata_t) f->image->palette->pixels[color]);
+	    } else
+		p_set(dest, black);
+	    p_inc(dest, 1);
+	    src++;
+	}
+    }
+}
+#endif
+#undef do_starfield
--
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