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Subject[PATCH][FBDEV]: fb_putcs() and fb_setfont() methods
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Date
Attached is a patch against 2.5.54 in an attempt to add putcs() and
setfont() methods for fbdev drivers that require them:

...
struct fb_char {
__u32 dx; /* where to place chars, in pixels */
__u32 dy; /* where to place chars, in scanline */
__u32 len; /* number of characters */
__u32 fg_color;
__u32 bg_color;
__u32 *data; /* array of indices to fontdata */
};

struct fb_fontdata {
__u32 width; /* font width */
__u32 height; /* font height */
__u32 len; /* number of characters */
__u8 *data; /* character map */
};

...

/* upload character map */
int (*fb_setfont)(struct fb_info *info, const struct fb_fontdata
*font);
/* write characters */
int (*fb_putcs)(struct fb_info *info, const struct fb_char *chars);

fb_setfont() uploads the character map to fbdev and makes it the current
map

fb_putcs() writes characters to display

I also did some rudimentary testing by adding test hooks to various
fbdev drivers but haven't examined its full effects (ie, different
character maps per console).

Tony

diff -Naur linux-2.5.54/drivers/video/console/fbcon.c linux/drivers/video/console/fbcon.c
--- linux-2.5.54/drivers/video/console/fbcon.c 2003-01-04 09:01:10.000000000 +0000
+++ linux/drivers/video/console/fbcon.c 2003-01-04 09:00:04.000000000 +0000
@@ -378,61 +378,97 @@
info->fbops->fb_fillrect(info, &region);
}

+#define FB_PIXMAPSIZE 8192
void accel_putcs(struct vc_data *vc, struct display *p,
const unsigned short *s, int count, int yy, int xx)
{
+ static u8 pixmap[FB_PIXMAPSIZE];
struct fb_info *info = p->fb_info;
unsigned short charmask = p->charmask;
unsigned int width = ((vc->vc_font.width + 7)/8);
- unsigned int cellsize = vc->vc_font.height * width;
- struct fb_image image;
+ unsigned int cnt, i, j, k;
+ unsigned int maxcnt;
u16 c = scr_readw(s);
- static u8 pixmap[8192];
+
+ if (info->fbops->fb_putcs) {
+ struct fb_char chars;
+
+ maxcnt = FB_PIXMAPSIZE/4;
+ chars.dx = xx * vc->vc_font.width;
+ chars.dy = yy * vc->vc_font.height;
+ chars.fg_color = attr_fgcol(p, c);
+ chars.bg_color = attr_bgcol(p, c);
+ chars.data = (u32 *) pixmap;
+
+ while (count) {
+ if (count > maxcnt)
+ cnt = maxcnt;
+ else
+ cnt = count;
+ chars.len = cnt;
+ for (i = 0; i < cnt; i++)
+ ((u32 *)pixmap)[i] = (u32) (scr_readw(s++) &
+ charmask);
+
+ info->fbops->fb_putcs(info, &chars);
+ chars.dx += cnt * vc->vc_font.width;
+ count -= cnt;
+ }
+ }
+ else {
+ unsigned int cellsize = vc->vc_font.height * width;
+ struct fb_image image;

- image.fg_color = attr_fgcol(p, c);
- image.bg_color = attr_bgcol(p, c);
- image.dx = xx * vc->vc_font.width;
- image.dy = yy * vc->vc_font.height;
- image.height = vc->vc_font.height;
- image.depth = 1;
-
-/* pixmap = kmalloc((info->var.bits_per_pixel + 7) >> 3 *
- vc->vc_font.height, GFP_KERNEL);
-*/
+ image.fg_color = attr_fgcol(p, c);
+ image.bg_color = attr_bgcol(p, c);
+ image.dx = xx * vc->vc_font.width;
+ image.dy = yy * vc->vc_font.height;
+ image.height = vc->vc_font.height;
+ image.depth = 1;
+
+ if (!(vc->vc_font.width & 7)) {
+ unsigned int pitch;
+ char *src, *dst, *dst0;
+
+ maxcnt = FB_PIXMAPSIZE/(vc->vc_font.height * width);
+ image.data = pixmap;
+ while (count) {
+ if (count > maxcnt)
+ cnt = k = maxcnt;
+ else
+ cnt = k = count;

- if (!(vc->vc_font.width & 7) && pixmap != NULL) {
- unsigned int pitch = width * count, i, j;
- char *src, *dst, *dst0;
-
- dst0 = pixmap;
- image.width = vc->vc_font.width * count;
- image.data = pixmap;
- while (count--) {
- src = p->fontdata + (scr_readw(s++) & charmask) * cellsize;
- dst = dst0;
- for (i = image.height; i--; ) {
- for (j = 0; j < width; j++)
- dst[j] = *src++;
- dst += pitch;
+ dst0 = pixmap;
+ pitch = width * cnt;
+ image.width = vc->vc_font.width * cnt;
+ while (k--) {
+ src = p->fontdata +
+ (scr_readw(s++)&charmask) *
+ cellsize;
+ dst = dst0;
+ for (i = image.height; i--; ) {
+ for (j = 0; j < width; j++)
+ dst[j] = *src++;
+ dst += pitch;
+ }
+ dst0 += width;
+ }
+
+ info->fbops->fb_imageblit(info, &image);
+ image.dx += cnt * vc->vc_font.width;
+ count -= cnt;
}
- dst0 += width;
+ } else {
+ image.width = vc->vc_font.width;
+ while (count--) {
+ image.data = p->fontdata +
+ (scr_readw(s++) & charmask) *
+ vc->vc_font.height * width;
+ info->fbops->fb_imageblit(info, &image);
+ image.dx += vc->vc_font.width;
+ }
}
- info->fbops->fb_imageblit(info, &image);
- if (info->fbops->fb_sync)
- info->fbops->fb_sync(info);
- } else {
- image.width = vc->vc_font.width;
- while (count--) {
- image.data = p->fontdata +
- (scr_readw(s++) & charmask) * vc->vc_font.height * width;
- info->fbops->fb_imageblit(info, &image);
- image.dx += vc->vc_font.width;
- }
}
- /*
- if (pixmap);
- kfree(pixmap);
- */
}

void accel_clear_margins(struct vc_data *vc, struct display *p,
@@ -1144,8 +1180,6 @@
struct display *p = &fb_display[vc->vc_num];
struct fb_info *info = p->fb_info;
unsigned short charmask = p->charmask;
- unsigned int width = ((vc->vc_font.width + 7) >> 3);
- struct fb_image image;
int redraw_cursor = 0;

if (!p->can_soft_blank && console_blanked)
@@ -1158,18 +1192,35 @@
cursor_undrawn();
redraw_cursor = 1;
}
+
+ if (info->fbops->fb_putcs) {
+ struct fb_char chars;
+ u32 font = c & charmask;
+
+ chars.dx = xpos * vc->vc_font.width;
+ chars.dy = real_y(p, ypos) * vc->vc_font.height;
+ chars.len = 1;
+ chars.fg_color = attr_fgcol(p, c);
+ chars.bg_color = attr_bgcol(p, c);
+ chars.data = &font;

- image.fg_color = attr_fgcol(p, c);
- image.bg_color = attr_bgcol(p, c);
- image.dx = xpos * vc->vc_font.width;
- image.dy = real_y(p, ypos) * vc->vc_font.height;
- image.width = vc->vc_font.width;
- image.height = vc->vc_font.height;
- image.depth = 1;
- image.data = p->fontdata + (c & charmask) * vc->vc_font.height * width;
-
- info->fbops->fb_imageblit(info, &image);
-
+ info->fbops->fb_putcs(info, &chars);
+ }
+ else {
+ struct fb_image image;
+ unsigned int width = ((vc->vc_font.width + 7) >> 3);
+
+ image.fg_color = attr_fgcol(p, c);
+ image.bg_color = attr_bgcol(p, c);
+ image.dx = xpos * vc->vc_font.width;
+ image.dy = real_y(p, ypos) * vc->vc_font.height;
+ image.width = vc->vc_font.width;
+ image.height = vc->vc_font.height;
+ image.depth = 1;
+ image.data = p->fontdata + (c & charmask) * vc->vc_font.height * width;
+
+ info->fbops->fb_imageblit(info, &image);
+ }
if (redraw_cursor)
vbl_cursor_cnt = CURSOR_DRAW_DELAY;
}
@@ -1271,16 +1322,9 @@

int update_var(int con, struct fb_info *info)
{
- int err;
+ if (con == info->currcon)
+ return fb_pan_display(&info->var, info);

- if (con == info->currcon) {
- if (info->fbops->fb_pan_display) {
- if ((err =
- info->fbops->fb_pan_display(&info->var,
- info)))
- return err;
- }
- }
return 0;
}

@@ -1918,6 +1962,18 @@
scrollback_max = 0;
scrollback_current = 0;

+ if (info->fbops->fb_setfont) {
+ struct fb_fontdata font;
+
+ font.width = vc->vc_font.width;
+ font.height = vc->vc_font.height;
+ font.len = FNTCHARCNT(p->fontdata);
+ font.data = p->fontdata;
+
+ if (info->fbops->fb_setfont(info, &font))
+ return 0;
+ }
+
info->currcon = unit;

update_var(unit, info);
@@ -2133,6 +2189,18 @@

}

+ if (info->fbops->fb_setfont) {
+ struct fb_fontdata font;
+
+ font.width = vc->vc_font.width;
+ font.height = vc->vc_font.height;
+ font.len = cnt;
+ font.data = p->fontdata;
+
+ if (info->fbops->fb_setfont(info, &font))
+ return 1;
+ }
+
if (resize) {
/* reset wrap/pan */
info->var.xoffset = info->var.yoffset = p->yscroll = 0;
diff -Naur linux-2.5.54/include/linux/fb.h linux/include/linux/fb.h
--- linux-2.5.54/include/linux/fb.h 2003-01-04 09:01:31.000000000 +0000
+++ linux/include/linux/fb.h 2003-01-04 09:00:35.000000000 +0000
@@ -295,6 +295,23 @@
struct fb_cmap cmap; /* color map info */
};

+struct fb_char {
+ __u32 dx; /* where to place chars, in pixels */
+ __u32 dy; /* where to place chars, in scanline */
+ __u32 len; /* number of characters */
+ __u32 fg_color;
+ __u32 bg_color;
+ __u32 *data; /* array of indices to fontdata */
+};
+
+struct fb_fontdata {
+ __u32 width; /* font width */
+ __u32 height; /* font height */
+ __u32 len; /* number of characters */
+ __u8 *data; /* character map */
+};
+
+
/*
* hardware cursor control
*/
@@ -375,6 +392,10 @@
unsigned long arg, struct fb_info *info);
/* perform fb specific mmap */
int (*fb_mmap)(struct fb_info *info, struct file *file, struct vm_area_struct *vma);
+ /* upload character map */
+ int (*fb_setfont)(struct fb_info *info, const struct fb_fontdata *font);
+ /* write characters */
+ int (*fb_putcs)(struct fb_info *info, const struct fb_char *chars);
};

struct fb_info {



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