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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/console/fbcon.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/video/console/fbcon.h')
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diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h
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+/*
+ * linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver
+ *
+ * Copyright (C) 1997 Geert Uytterhoeven
+ *
+ * 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 _VIDEO_FBCON_H
+#define _VIDEO_FBCON_H
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/vt_buffer.h>
+#include <linux/vt_kern.h>
+
+#include <asm/io.h>
+
+#define FBCON_FLAGS_INIT 1
+
+ /*
+ * This is the interface between the low-level console driver and the
+ * low-level frame buffer device
+ */
+
+struct display {
+ /* Filled in by the frame buffer device */
+ u_short inverse; /* != 0 text black on white as default */
+ /* Filled in by the low-level console driver */
+ u_char *fontdata;
+ int userfont; /* != 0 if fontdata kmalloc()ed */
+ u_short scrollmode; /* Scroll Method */
+ short yscroll; /* Hardware scrolling */
+ int vrows; /* number of virtual rows */
+ int cursor_shape;
+ u32 xres_virtual;
+ u32 yres_virtual;
+ u32 height;
+ u32 width;
+ u32 bits_per_pixel;
+ u32 grayscale;
+ u32 nonstd;
+ u32 accel_flags;
+ u32 rotate;
+ struct fb_bitfield red;
+ struct fb_bitfield green;
+ struct fb_bitfield blue;
+ struct fb_bitfield transp;
+ struct fb_videomode *mode;
+};
+
+struct fbcon_ops {
+ void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,
+ int sx, int dy, int dx, int height, int width);
+ void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
+ int sx, int height, int width);
+ void (*putcs)(struct vc_data *vc, struct fb_info *info,
+ const unsigned short *s, int count, int yy, int xx,
+ int fg, int bg);
+ void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
+ int bottom_only);
+ void (*cursor)(struct vc_data *vc, struct fb_info *info,
+ struct display *p, int mode, int softback_lines, int fg, int bg);
+
+ struct timer_list cursor_timer; /* Cursor timer */
+ struct fb_cursor cursor_state;
+ int currcon; /* Current VC. */
+ int cursor_flash;
+ int cursor_reset;
+ int blank_state;
+ int graphics;
+ int flags;
+ char *cursor_data;
+};
+ /*
+ * Attribute Decoding
+ */
+
+/* Color */
+#define attr_fgcol(fgshift,s) \
+ (((s) >> (fgshift)) & 0x0f)
+#define attr_bgcol(bgshift,s) \
+ (((s) >> (bgshift)) & 0x0f)
+#define attr_bgcol_ec(bgshift,vc) \
+ ((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0)
+#define attr_fgcol_ec(fgshift,vc) \
+ ((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0)
+
+/* Monochrome */
+#define attr_bold(s) \
+ ((s) & 0x200)
+#define attr_reverse(s) \
+ ((s) & 0x800)
+#define attr_underline(s) \
+ ((s) & 0x400)
+#define attr_blink(s) \
+ ((s) & 0x8000)
+
+/* Font */
+#define REFCOUNT(fd) (((int *)(fd))[-1])
+#define FNTSIZE(fd) (((int *)(fd))[-2])
+#define FNTCHARCNT(fd) (((int *)(fd))[-3])
+#define FNTSUM(fd) (((int *)(fd))[-4])
+#define FONT_EXTRA_WORDS 4
+
+ /*
+ * Scroll Method
+ */
+
+/* There are several methods fbcon can use to move text around the screen:
+ *
+ * Operation Pan Wrap
+ *---------------------------------------------
+ * SCROLL_MOVE copyarea No No
+ * SCROLL_PAN_MOVE copyarea Yes No
+ * SCROLL_WRAP_MOVE copyarea No Yes
+ * SCROLL_REDRAW imageblit No No
+ * SCROLL_PAN_REDRAW imageblit Yes No
+ * SCROLL_WRAP_REDRAW imageblit No Yes
+ *
+ * (SCROLL_WRAP_REDRAW is not implemented yet)
+ *
+ * In general, fbcon will choose the best scrolling
+ * method based on the rule below:
+ *
+ * Pan/Wrap > accel imageblit > accel copyarea >
+ * soft imageblit > (soft copyarea)
+ *
+ * Exception to the rule: Pan + accel copyarea is
+ * preferred over Pan + accel imageblit.
+ *
+ * The above is typical for PCI/AGP cards. Unless
+ * overridden, fbcon will never use soft copyarea.
+ *
+ * If you need to override the above rule, set the
+ * appropriate flags in fb_info->flags. For example,
+ * to prefer copyarea over imageblit, set
+ * FBINFO_READS_FAST.
+ *
+ * Other notes:
+ * + use the hardware engine to move the text
+ * (hw-accelerated copyarea() and fillrect())
+ * + use hardware-supported panning on a large virtual screen
+ * + amifb can not only pan, but also wrap the display by N lines
+ * (i.e. visible line i = physical line (i+N) % yres).
+ * + read what's already rendered on the screen and
+ * write it in a different place (this is cfb_copyarea())
+ * + re-render the text to the screen
+ *
+ * Whether to use wrapping or panning can only be figured out at
+ * runtime (when we know whether our font height is a multiple
+ * of the pan/wrap step)
+ *
+ */
+
+#define SCROLL_MOVE 0x001
+#define SCROLL_PAN_MOVE 0x002
+#define SCROLL_WRAP_MOVE 0x003
+#define SCROLL_REDRAW 0x004
+#define SCROLL_PAN_REDRAW 0x005
+
+#ifdef CONFIG_FB_TILEBLITTING
+extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
+ struct display *p, struct fbcon_ops *ops);
+#endif
+extern void fbcon_set_bitops(struct fbcon_ops *ops);
+
+#endif /* _VIDEO_FBCON_H */