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path: root/drivers/video/console/softcursor.c
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Diffstat (limited to 'drivers/video/console/softcursor.c')
-rw-r--r--drivers/video/console/softcursor.c82
1 files changed, 82 insertions, 0 deletions
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");