Contributors: 20
Author Tokens Token Proportion Commits Commit Proportion
Antonino A. Daplas 303 39.35% 17 24.29%
Linus Torvalds (pre-git) 161 20.91% 13 18.57%
Helge Deller 67 8.70% 2 2.86%
James Simmons 58 7.53% 15 21.43%
Harvey Harrison 57 7.40% 1 1.43%
Thomas Zimmermann 50 6.49% 6 8.57%
Benjamin Herrenschmidt 18 2.34% 1 1.43%
Andrew Morton 10 1.30% 1 1.43%
Daniel Vetter 10 1.30% 3 4.29%
Dave Jones 7 0.91% 1 1.43%
Zsolt Kajtar 6 0.78% 1 1.43%
Kees Cook 5 0.65% 1 1.43%
Thomas Pfaff 4 0.52% 1 1.43%
Scot Doyle 3 0.39% 1 1.43%
David Winn 3 0.39% 1 1.43%
David Lechner 3 0.39% 1 1.43%
Jiri Slaby (SUSE) 2 0.26% 1 1.43%
Linus Torvalds 1 0.13% 1 1.43%
Adrian Bunk 1 0.13% 1 1.43%
Geert Uytterhoeven 1 0.13% 1 1.43%
Total 770 70 


/*
 *  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/font.h>
#include <linux/types.h>
#include <linux/vt_buffer.h>
#include <linux/vt_kern.h>
#include <linux/workqueue.h>

#include <asm/io.h>

   /*
    *    This is the interface between the low-level console driver and the
    *    low-level frame buffer device
    */

struct fbcon_display {
    /* Filled in by the low-level console driver */
    font_data_t *fontdata;
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
    u_short scrollmode;             /* Scroll Method, use fb_scrollmode() */
#endif
    short yscroll;                  /* Hardware scrolling */
    int vrows;                      /* number of virtual rows */
    int cursor_shape;
    int con_rotate;
    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;
    const struct fb_videomode *mode;
};

struct fbcon_bitops {
	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, int fb, int bg);
	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 color, int bottom_only);
	void (*cursor)(struct vc_data *vc, struct fb_info *info,
		       bool enable, int fg, int bg);
	int  (*update_start)(struct fb_info *info);
	int  (*rotate_font)(struct fb_info *info, struct vc_data *vc);
};

struct fbcon_par {
	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
	struct delayed_work cursor_work; /* Cursor timer */
	struct fb_cursor cursor_state;
	struct fbcon_display *p;
	struct fb_info *info;
        int    currcon;	                /* Current VC. */
	int    cur_blink_jiffies;
	int    cursor_flash;
	int    cursor_reset;
	int    blank_state;
	int    graphics;
	bool   initialized;
	int    rotate;
	char  *cursor_data;
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
	struct {
		font_data_t *fontdata;  /* source font */
		u8 *buf;                /* rotated glyphs */
		size_t bufsize;
		int buf_rotate;         /* rotation of buf */
	} rotated;
#endif
	u8    *cursor_src;
	u32    cursor_size;

	const struct fbcon_bitops *bitops;
};

    /*
     *  Attribute Decoding
     */

/* Color */
#define attr_fgcol(fgshift,s)    \
	(((s) >> (fgshift)) & 0x0f)
#define attr_bgcol(bgshift,s)    \
	(((s) >> (bgshift)) & 0x0f)

/* 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)

static inline int mono_col(const struct fb_info *info)
{
	__u32 max_len;
	max_len = max(info->var.green.length, info->var.red.length);
	max_len = max(info->var.blue.length, max_len);
	return (~(0xfff << max_len)) & 0xff;
}

    /*
     *  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

static inline u_short fb_scrollmode(struct fbcon_display *fb)
{
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
	return fb->scrollmode;
#else
	/* hardcoded to SCROLL_REDRAW if acceleration was disabled. */
	return SCROLL_REDRAW;
#endif
}


#ifdef CONFIG_FB_TILEBLITTING
extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
#endif
extern void fbcon_set_bitops_ur(struct fbcon_par *par);
extern int  soft_cursor(struct fb_info *info, struct fb_cursor *cursor);

void fbcon_fill_cursor_mask(struct fbcon_par *par, struct vc_data *vc, unsigned char *mask);

#define FBCON_ATTRIBUTE_UNDERLINE 1
#define FBCON_ATTRIBUTE_REVERSE   2
#define FBCON_ATTRIBUTE_BOLD      4

static inline int real_y(struct fbcon_display *p, int ypos)
{
	int rows = p->vrows;

	ypos += p->yscroll;
	return ypos < rows ? ypos : ypos - rows;
}


static inline int get_attribute(struct fb_info *info, u16 c)
{
	int attribute = 0;

	if (fb_get_color_depth(&info->var, &info->fix) == 1) {
		if (attr_underline(c))
			attribute |= FBCON_ATTRIBUTE_UNDERLINE;
		if (attr_reverse(c))
			attribute |= FBCON_ATTRIBUTE_REVERSE;
		if (attr_bold(c))
			attribute |= FBCON_ATTRIBUTE_BOLD;
	}

	return attribute;
}

#define FBCON_SWAP(i,r,v) ({ \
        typeof(r) _r = (r);  \
        typeof(v) _v = (v);  \
        (void) (&_r == &_v); \
        (i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; })

#endif /* _VIDEO_FBCON_H */