From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/video/console/softcursor.c | 82 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 drivers/video/console/softcursor.c

(limited to 'drivers/video/console/softcursor.c')

diff --git a/drivers/video/console/softcursor.c b/drivers/video/console/softcursor.c
new file mode 100644
index 000000000..46dd8f5d2
--- /dev/null
+++ b/drivers/video/console/softcursor.c
@@ -0,0 +1,82 @@
+/*
+ * linux/drivers/video/console/softcursor.c
+ *
+ * Generic software cursor for frame buffer devices
+ *
+ *  Created 14 Nov 2002 by James Simmons
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of this
+ * archive for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+
+#include "fbcon.h"
+
+int soft_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	unsigned int scan_align = info->pixmap.scan_align - 1;
+	unsigned int buf_align = info->pixmap.buf_align - 1;
+	unsigned int i, size, dsize, s_pitch, d_pitch;
+	struct fb_image *image;
+	u8 *src, *dst;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return 0;
+
+	s_pitch = (cursor->image.width + 7) >> 3;
+	dsize = s_pitch * cursor->image.height;
+
+	if (dsize + sizeof(struct fb_image) != ops->cursor_size) {
+		kfree(ops->cursor_src);
+		ops->cursor_size = dsize + sizeof(struct fb_image);
+
+		ops->cursor_src = kmalloc(ops->cursor_size, GFP_ATOMIC);
+		if (!ops->cursor_src) {
+			ops->cursor_size = 0;
+			return -ENOMEM;
+		}
+	}
+
+	src = ops->cursor_src + sizeof(struct fb_image);
+	image = (struct fb_image *)ops->cursor_src;
+	*image = cursor->image;
+	d_pitch = (s_pitch + scan_align) & ~scan_align;
+
+	size = d_pitch * image->height + buf_align;
+	size &= ~buf_align;
+	dst = fb_get_buffer_offset(info, &info->pixmap, size);
+
+	if (cursor->enable) {
+		switch (cursor->rop) {
+		case ROP_XOR:
+			for (i = 0; i < dsize; i++)
+				src[i] = image->data[i] ^ cursor->mask[i];
+			break;
+		case ROP_COPY:
+		default:
+			for (i = 0; i < dsize; i++)
+				src[i] = image->data[i] & cursor->mask[i];
+			break;
+		}
+	} else
+		memcpy(src, image->data, dsize);
+
+	fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, image->height);
+	image->data = dst;
+	info->fbops->fb_imageblit(info, image);
+	return 0;
+}
+
+EXPORT_SYMBOL(soft_cursor);
+
+MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
+MODULE_DESCRIPTION("Generic software cursor");
+MODULE_LICENSE("GPL");
-- 
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