Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / video / console / fbcon_rotate.h

diff --git a/kernel/drivers/video/console/fbcon_rotate.h b/kernel/drivers/video/console/fbcon_rotate.h
new file mode 100644 (file)
index 0000000..e233444
--- /dev/null
+++ b/kernel/drivers/video/console/fbcon_rotate.h
@@ -0,0 +1,96 @@
+/*
+ *  linux/drivers/video/console/fbcon_rotate.h -- Software Display Rotation
+ *
+ *     Copyright (C) 2005 Antonino Daplas <adaplas@pol.net>
+ *
+ *  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.
+ */
+
+#ifndef _FBCON_ROTATE_H
+#define _FBCON_ROTATE_H
+
+#define GETVYRES(s,i) ({                           \
+        (s == SCROLL_REDRAW || s == SCROLL_MOVE) ? \
+        (i)->var.yres : (i)->var.yres_virtual; })
+
+#define GETVXRES(s,i) ({                           \
+        (s == SCROLL_REDRAW || s == SCROLL_MOVE || !(i)->fix.xpanstep) ? \
+        (i)->var.xres : (i)->var.xres_virtual; })
+
+
+static inline int pattern_test_bit(u32 x, u32 y, u32 pitch, const char *pat)
+{
+       u32 tmp = (y * pitch) + x, index = tmp / 8,  bit = tmp % 8;
+
+       pat +=index;
+       return (*pat) & (0x80 >> bit);
+}
+
+static inline void pattern_set_bit(u32 x, u32 y, u32 pitch, char *pat)
+{
+       u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8;
+
+       pat += index;
+
+       (*pat) |= 0x80 >> bit;
+}
+
+static inline void rotate_ud(const char *in, char *out, u32 width, u32 height)
+{
+       int i, j;
+       int shift = (8 - (width % 8)) & 7;
+
+       width = (width + 7) & ~7;
+
+       for (i = 0; i < height; i++) {
+               for (j = 0; j < width - shift; j++) {
+                       if (pattern_test_bit(j, i, width, in))
+                               pattern_set_bit(width - (1 + j + shift),
+                                               height - (1 + i),
+                                               width, out);
+               }
+
+       }
+}
+
+static inline void rotate_cw(const char *in, char *out, u32 width, u32 height)
+{
+       int i, j, h = height, w = width;
+       int shift = (8 - (height % 8)) & 7;
+
+       width = (width + 7) & ~7;
+       height = (height + 7) & ~7;
+
+       for (i = 0; i < h; i++) {
+               for (j = 0; j < w; j++) {
+                       if (pattern_test_bit(j, i, width, in))
+                               pattern_set_bit(height - 1 - i - shift, j,
+                                               height, out);
+
+               }
+       }
+}
+
+static inline void rotate_ccw(const char *in, char *out, u32 width, u32 height)
+{
+       int i, j, h = height, w = width;
+       int shift = (8 - (width % 8)) & 7;
+
+       width = (width + 7) & ~7;
+       height = (height + 7) & ~7;
+
+       for (i = 0; i < h; i++) {
+               for (j = 0; j < w; j++) {
+                       if (pattern_test_bit(j, i, width, in))
+                               pattern_set_bit(i, width - 1 - j - shift,
+                                               height, out);
+               }
+       }
+}
+
+extern void fbcon_rotate_cw(struct fbcon_ops *ops);
+extern void fbcon_rotate_ud(struct fbcon_ops *ops);
+extern void fbcon_rotate_ccw(struct fbcon_ops *ops);
+#endif