1 files changed, 94 insertions, 0 deletions
diff --git a/src/display/nr-plain-stuff.cpp b/src/display/nr-plain-stuff.cpp
new file mode 100644
index 000000000..af6e002ec
--- /dev/null
+++ b/src/display/nr-plain-stuff.cpp
@@ -0,0 +1,94 @@
+#define __NR_PLAIN_STUFF_C__
+
+/*
+ * Miscellaneous simple rendering utilities
+ *
+ * Author:
+ *   Lauris Kaplinski <lauris@ximian.com>
+ *
+ * Copyright (C) 2001 Lauris Kaplinski and Ximian, Inc.
+ *
+ * Released under GNU GPL
+ */
+
+#include <glib/gmessages.h>
+#include <libnr/nr-pixops.h>
+#include "nr-plain-stuff.h"
+
+#define NR_DEFAULT_CHECKERSIZEP2 2
+#define NR_DEFAULT_CHECKERCOLOR0 0xbfbfbfff
+#define NR_DEFAULT_CHECKERCOLOR1 0x808080ff
+
+void
+nr_render_checkerboard_rgb (guchar *px, gint w, gint h, gint rs, gint xoff, gint yoff)
+{
+	g_return_if_fail (px != NULL);
+
+	nr_render_checkerboard_rgb_custom (px, w, h, rs, xoff, yoff, NR_DEFAULT_CHECKERCOLOR0, NR_DEFAULT_CHECKERCOLOR1, NR_DEFAULT_CHECKERSIZEP2);
+}
+
+void
+nr_render_checkerboard_rgb_custom (guchar *px, gint w, gint h, gint rs, gint xoff, gint yoff, guint32 c0, guint32 c1, gint sizep2)
+{
+	gint x, y, m;
+	guint r0, g0, b0;
+	guint r1, g1, b1;
+
+	g_return_if_fail (px != NULL);
+	g_return_if_fail (sizep2 >= 0);
+	g_return_if_fail (sizep2 <= 8);
+
+	xoff &= 0x1ff;
+	yoff &= 0x1ff;
+	m = 0x1 << sizep2;
+	r0 = NR_RGBA32_R (c0);
+	g0 = NR_RGBA32_G (c0);
+	b0 = NR_RGBA32_B (c0);
+	r1 = NR_RGBA32_R (c1);
+	g1 = NR_RGBA32_G (c1);
+	b1 = NR_RGBA32_B (c1);
+
+	for (y = 0; y < h; y++) {
+		guchar *p;
+		p = px;
+		for (x = 0; x < w; x++) {
+			if (((x + xoff) ^ (y + yoff)) & m) {
+				*p++ = r0;
+				*p++ = g0;
+				*p++ = b0;
+			} else {
+				*p++ = r1;
+				*p++ = g1;
+				*p++ = b1;
+			}
+		}
+		px += rs;
+	}
+}
+
+void
+nr_render_rgba32_rgb (guchar *px, gint w, gint h, gint rs, gint xoff, gint yoff, guint32 c)
+{
+	guint32 c0, c1;
+	gint a, r, g, b, cr, cg, cb;
+
+	g_return_if_fail (px != NULL);
+
+	r = NR_RGBA32_R (c);
+	g = NR_RGBA32_G (c);
+	b = NR_RGBA32_B (c);
+	a = NR_RGBA32_A (c);
+
+	cr = NR_COMPOSEN11 (r, a, NR_RGBA32_R (NR_DEFAULT_CHECKERCOLOR0));
+	cg = NR_COMPOSEN11 (g, a, NR_RGBA32_G (NR_DEFAULT_CHECKERCOLOR0));
+	cb = NR_COMPOSEN11 (b, a, NR_RGBA32_B (NR_DEFAULT_CHECKERCOLOR0));
+	c0 = (cr << 24) | (cg << 16) | (cb << 8) | 0xff;
+
+	cr = NR_COMPOSEN11 (r, a, NR_RGBA32_R (NR_DEFAULT_CHECKERCOLOR1));
+	cg = NR_COMPOSEN11 (g, a, NR_RGBA32_G (NR_DEFAULT_CHECKERCOLOR1));
+	cb = NR_COMPOSEN11 (b, a, NR_RGBA32_B (NR_DEFAULT_CHECKERCOLOR1));
+	c1 = (cr << 24) | (cg << 16) | (cb << 8) | 0xff;
+
+	nr_render_checkerboard_rgb_custom (px, w, h, rs, xoff, yoff, c0, c1, NR_DEFAULT_CHECKERSIZEP2);
+}
+