[PATCH] fbcon: Console Rotation - Add support for 270-degree rotation
authorAntonino A. Daplas <adaplas@gmail.com>
Wed, 9 Nov 2005 05:39:14 +0000 (21:39 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Wed, 9 Nov 2005 15:56:34 +0000 (07:56 -0800)
Add support for 270-degree (counterclockwise) rotation of the console.  To
activate, boot with:

fbcon=rotate:3

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/video/console/Makefile
drivers/video/console/fbcon_ccw.c [new file with mode: 0644]
drivers/video/console/fbcon_rotate.c
drivers/video/console/fbcon_rotate.h

index 830ff46..fed600c 100644 (file)
@@ -32,7 +32,8 @@ ifeq ($(CONFIG_FB_TILEBLITTING),y)
 obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += tileblit.o
 endif
 ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y)
-obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += fbcon_rotate.o fbcon_cw.o fbcon_ud.o
+obj-$(CONFIG_FRAMEBUFFER_CONSOLE)     += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \
+                                         fbcon_ccw.o
 endif
 
 obj-$(CONFIG_FB_STI)              += sticore.o font.o
diff --git a/drivers/video/console/fbcon_ccw.c b/drivers/video/console/fbcon_ccw.c
new file mode 100644 (file)
index 0000000..680aaba
--- /dev/null
@@ -0,0 +1,428 @@
+/*
+ *  linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 degrees
+ *
+ *      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.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+#include <asm/types.h>
+#include "fbcon.h"
+#include "fbcon_rotate.h"
+
+/*
+ * Rotation 270 degrees
+ */
+
+static inline void ccw_update_attr(u8 *dst, u8 *src, int attribute,
+                                 struct vc_data *vc)
+{
+       int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
+       int width = (vc->vc_font.height + 7) >> 3;
+       int mod = vc->vc_font.height % 8;
+       u8 c, msk = ~(0xff << offset), msk1 = 0;
+
+       if (mod)
+               msk <<= (8 - mod);
+
+       if (offset > mod)
+               set_bit(FBCON_BIT(7), (void *)&msk1);
+
+       for (i = 0; i < vc->vc_font.width; i++) {
+               for (j = 0; j < width; j++) {
+                       c = *src;
+
+                       if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
+                               if (j == width - 1)
+                                       c |= msk;
+
+                               if (msk1 && j == width - 2)
+                                       c |= msk1;
+                       }
+
+                       if (attribute & FBCON_ATTRIBUTE_BOLD && i)
+                               *(dst - width) |= c;
+
+                       if (attribute & FBCON_ATTRIBUTE_REVERSE)
+                               c = ~c;
+                       src++;
+                       *dst++ = c;
+               }
+       }
+}
+
+
+static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
+                    int sx, int dy, int dx, int height, int width)
+{
+       struct display *p = &fb_display[vc->vc_num];
+       struct fb_copyarea area;
+       u32 vyres = GETVYRES(p->scrollmode, info);
+
+       area.sx = sy * vc->vc_font.height;
+       area.sy = vyres - ((sx + width) * vc->vc_font.width);
+       area.dx = dy * vc->vc_font.height;
+       area.dy = vyres - ((dx + width) * vc->vc_font.width);
+       area.width = height * vc->vc_font.height;
+       area.height  = width * vc->vc_font.width;
+
+       info->fbops->fb_copyarea(info, &area);
+}
+
+static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
+                    int sx, int height, int width)
+{
+       struct display *p = &fb_display[vc->vc_num];
+       struct fb_fillrect region;
+       int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
+       u32 vyres = GETVYRES(p->scrollmode, info);
+
+       region.color = attr_bgcol_ec(bgshift,vc);
+       region.dx = sy * vc->vc_font.height;
+       region.dy = vyres - ((sx + width) * vc->vc_font.width);
+       region.height = width * vc->vc_font.width;
+       region.width = height * vc->vc_font.height;
+       region.rop = ROP_COPY;
+
+       info->fbops->fb_fillrect(info, &region);
+}
+
+static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
+                                   const u16 *s, u32 attr, u32 cnt,
+                                   u32 d_pitch, u32 s_pitch, u32 cellsize,
+                                   struct fb_image *image, u8 *buf, u8 *dst)
+{
+       struct fbcon_ops *ops = info->fbcon_par;
+       u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+       u32 idx = (vc->vc_font.height + 7) >> 3;
+       u8 *src;
+
+       while (cnt--) {
+               src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
+
+               if (attr) {
+                       ccw_update_attr(buf, src, attr, vc);
+                       src = buf;
+               }
+
+               if (likely(idx == 1))
+                       __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
+                                               vc->vc_font.width);
+               else
+                       fb_pad_aligned_buffer(dst, d_pitch, src, idx,
+                                             vc->vc_font.width);
+
+               dst += d_pitch * vc->vc_font.width;
+       }
+
+       info->fbops->fb_imageblit(info, image);
+}
+
+static void ccw_putcs(struct vc_data *vc, struct fb_info *info,
+                     const unsigned short *s, int count, int yy, int xx,
+                     int fg, int bg)
+{
+       struct fb_image image;
+       struct display *p = &fb_display[vc->vc_num];
+       struct fbcon_ops *ops = info->fbcon_par;
+       u32 width = (vc->vc_font.height + 7)/8;
+       u32 cellsize = width * vc->vc_font.width;
+       u32 maxcnt = info->pixmap.size/cellsize;
+       u32 scan_align = info->pixmap.scan_align - 1;
+       u32 buf_align = info->pixmap.buf_align - 1;
+       u32 cnt, pitch, size;
+       u32 attribute = get_attribute(info, scr_readw(s));
+       u8 *dst, *buf = NULL;
+       u32 vyres = GETVYRES(p->scrollmode, info);
+
+       if (!ops->fontbuffer)
+               return;
+
+       image.fg_color = fg;
+       image.bg_color = bg;
+       image.dx = yy * vc->vc_font.height;
+       image.dy = vyres - ((xx + count) * vc->vc_font.width);
+       image.width = vc->vc_font.height;
+       image.depth = 1;
+
+       if (attribute) {
+               buf = kmalloc(cellsize, GFP_KERNEL);
+               if (!buf)
+                       return;
+       }
+
+       s += count - 1;
+
+       while (count) {
+               if (count > maxcnt)
+                       cnt = maxcnt;
+               else
+                       cnt = count;
+
+               image.height = vc->vc_font.width * cnt;
+               pitch = ((image.width + 7) >> 3) + scan_align;
+               pitch &= ~scan_align;
+               size = pitch * image.height + buf_align;
+               size &= ~buf_align;
+               dst = fb_get_buffer_offset(info, &info->pixmap, size);
+               image.data = dst;
+               ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
+                                width, cellsize, &image, buf, dst);
+               image.dy += image.height;
+               count -= cnt;
+               s -= cnt;
+       }
+
+       /* buf is always NULL except when in monochrome mode, so in this case
+          it's a gain to check buf against NULL even though kfree() handles
+          NULL pointers just fine */
+       if (unlikely(buf))
+               kfree(buf);
+
+}
+
+static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
+                            int bottom_only)
+{
+       unsigned int cw = vc->vc_font.width;
+       unsigned int ch = vc->vc_font.height;
+       unsigned int rw = info->var.yres - (vc->vc_cols*cw);
+       unsigned int bh = info->var.xres - (vc->vc_rows*ch);
+       unsigned int bs = vc->vc_rows*ch;
+       struct fb_fillrect region;
+       int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
+
+       region.color = attr_bgcol_ec(bgshift,vc);
+       region.rop = ROP_COPY;
+
+       if (rw && !bottom_only) {
+               region.dx = 0;
+               region.dy = info->var.yoffset;
+               region.height = rw;
+               region.width = info->var.xres_virtual;
+               info->fbops->fb_fillrect(info, &region);
+       }
+
+       if (bh) {
+               region.dx = info->var.xoffset + bs;
+               region.dy = 0;
+                region.height = info->var.yres_virtual;
+                region.width = bh;
+               info->fbops->fb_fillrect(info, &region);
+       }
+}
+
+static void ccw_cursor(struct vc_data *vc, struct fb_info *info,
+                     struct display *p, int mode, int softback_lines,
+                     int fg, int bg)
+{
+       struct fb_cursor cursor;
+       struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
+       unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+       int w = (vc->vc_font.height + 7) >> 3, c;
+       int y = real_y(p, vc->vc_y);
+       int attribute, use_sw = (vc->vc_cursor_type & 0x10);
+       int err = 1, dx, dy;
+       char *src;
+       u32 vyres = GETVYRES(p->scrollmode, info);
+
+       if (!ops->fontbuffer)
+               return;
+
+       cursor.set = 0;
+
+       if (softback_lines) {
+               if (y + softback_lines >= vc->vc_rows) {
+                       mode = CM_ERASE;
+                       ops->cursor_flash = 0;
+                       return;
+               } else
+                       y += softback_lines;
+       }
+
+       c = scr_readw((u16 *) vc->vc_pos);
+       attribute = get_attribute(info, c);
+       src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
+
+       if (ops->cursor_state.image.data != src ||
+           ops->cursor_reset) {
+           ops->cursor_state.image.data = src;
+           cursor.set |= FB_CUR_SETIMAGE;
+       }
+
+       if (attribute) {
+               u8 *dst;
+
+               dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
+               if (!dst)
+                       return;
+               kfree(ops->cursor_data);
+               ops->cursor_data = dst;
+               ccw_update_attr(dst, src, attribute, vc);
+               src = dst;
+       }
+
+       if (ops->cursor_state.image.fg_color != fg ||
+           ops->cursor_state.image.bg_color != bg ||
+           ops->cursor_reset) {
+               ops->cursor_state.image.fg_color = fg;
+               ops->cursor_state.image.bg_color = bg;
+               cursor.set |= FB_CUR_SETCMAP;
+       }
+
+       if (ops->cursor_state.image.height != vc->vc_font.width ||
+           ops->cursor_state.image.width != vc->vc_font.height ||
+           ops->cursor_reset) {
+               ops->cursor_state.image.height = vc->vc_font.width;
+               ops->cursor_state.image.width = vc->vc_font.height;
+               cursor.set |= FB_CUR_SETSIZE;
+       }
+
+       dx = y * vc->vc_font.height;
+       dy = vyres - ((vc->vc_x + 1) * vc->vc_font.width);
+
+       if (ops->cursor_state.image.dx != dx ||
+           ops->cursor_state.image.dy != dy ||
+           ops->cursor_reset) {
+               ops->cursor_state.image.dx = dx;
+               ops->cursor_state.image.dy = dy;
+               cursor.set |= FB_CUR_SETPOS;
+       }
+
+       if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
+           ops->cursor_reset) {
+               ops->cursor_state.hot.x = cursor.hot.y = 0;
+               cursor.set |= FB_CUR_SETHOT;
+       }
+
+       if (cursor.set & FB_CUR_SETSIZE ||
+           vc->vc_cursor_type != p->cursor_shape ||
+           ops->cursor_state.mask == NULL ||
+           ops->cursor_reset) {
+               char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
+               int cur_height, size, i = 0;
+               int width = (vc->vc_font.width + 7)/8;
+
+               if (!mask)
+                       return;
+
+               tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
+
+               if (!tmp) {
+                       kfree(mask);
+                       return;
+               }
+
+               kfree(ops->cursor_state.mask);
+               ops->cursor_state.mask = mask;
+
+               p->cursor_shape = vc->vc_cursor_type;
+               cursor.set |= FB_CUR_SETSHAPE;
+
+               switch (p->cursor_shape & CUR_HWMASK) {
+               case CUR_NONE:
+                       cur_height = 0;
+                       break;
+               case CUR_UNDERLINE:
+                       cur_height = (vc->vc_font.height < 10) ? 1 : 2;
+                       break;
+               case CUR_LOWER_THIRD:
+                       cur_height = vc->vc_font.height/3;
+                       break;
+               case CUR_LOWER_HALF:
+                       cur_height = vc->vc_font.height >> 1;
+                       break;
+               case CUR_TWO_THIRDS:
+                       cur_height = (vc->vc_font.height << 1)/3;
+                       break;
+               case CUR_BLOCK:
+               default:
+                       cur_height = vc->vc_font.height;
+                       break;
+               }
+
+               size = (vc->vc_font.height - cur_height) * width;
+               while (size--)
+                       tmp[i++] = 0;
+               size = cur_height * width;
+               while (size--)
+                       tmp[i++] = 0xff;
+               memset(mask, 0, w * vc->vc_font.width);
+               rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
+               kfree(tmp);
+       }
+
+       switch (mode) {
+       case CM_ERASE:
+               ops->cursor_state.enable = 0;
+               break;
+       case CM_DRAW:
+       case CM_MOVE:
+       default:
+               ops->cursor_state.enable = (use_sw) ? 0 : 1;
+               break;
+       }
+
+       cursor.image.data = src;
+       cursor.image.fg_color = ops->cursor_state.image.fg_color;
+       cursor.image.bg_color = ops->cursor_state.image.bg_color;
+       cursor.image.dx = ops->cursor_state.image.dx;
+       cursor.image.dy = ops->cursor_state.image.dy;
+       cursor.image.height = ops->cursor_state.image.height;
+       cursor.image.width = ops->cursor_state.image.width;
+       cursor.hot.x = ops->cursor_state.hot.x;
+       cursor.hot.y = ops->cursor_state.hot.y;
+       cursor.mask = ops->cursor_state.mask;
+       cursor.enable = ops->cursor_state.enable;
+       cursor.image.depth = 1;
+       cursor.rop = ROP_XOR;
+
+       if (info->fbops->fb_cursor)
+               err = info->fbops->fb_cursor(info, &cursor);
+
+       if (err)
+               soft_cursor(info, &cursor);
+
+       ops->cursor_reset = 0;
+}
+
+int ccw_update_start(struct fb_info *info)
+{
+       struct fbcon_ops *ops = info->fbcon_par;
+       struct display *p = &fb_display[ops->currcon];
+       u32 yoffset;
+       u32 vyres = GETVYRES(p->scrollmode, info);
+       int err;
+
+       yoffset = (vyres - info->var.yres) - ops->var.xoffset;
+       ops->var.xoffset = ops->var.yoffset;
+       ops->var.yoffset = yoffset;
+       err = fb_pan_display(info, &ops->var);
+       ops->var.xoffset = info->var.xoffset;
+       ops->var.yoffset = info->var.yoffset;
+       ops->var.vmode = info->var.vmode;
+       return err;
+}
+
+void fbcon_rotate_ccw(struct fbcon_ops *ops)
+{
+       ops->bmove = ccw_bmove;
+       ops->clear = ccw_clear;
+       ops->putcs = ccw_putcs;
+       ops->clear_margins = ccw_clear_margins;
+       ops->cursor = ccw_cursor;
+       ops->update_start = ccw_update_start;
+}
+EXPORT_SYMBOL(fbcon_rotate_ccw);
+
+MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
+MODULE_DESCRIPTION("Console Rotation (270 degrees) Support");
+MODULE_LICENSE("GPL");
index 3d64ad1..ec0dd8f 100644 (file)
@@ -105,6 +105,9 @@ void fbcon_set_rotate(struct fbcon_ops *ops)
        case FB_ROTATE_UD:
                fbcon_rotate_ud(ops);
                break;
+       case FB_ROTATE_CCW:
+               fbcon_rotate_ccw(ops);
+               break;
        }
 }
 EXPORT_SYMBOL(fbcon_set_rotate);
index f8ddcd6..90c6720 100644 (file)
@@ -101,4 +101,5 @@ static inline void rotate_ccw(const char *in, char *out, u32 width, u32 height)
 
 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