source: npl/kernel/linux_src/4200_fbcondecor.patch

Documentation/fb/00-INDEX

@@ -23 +23 @@
         - info on the driver for EP93xx LCD controller.
 fbcon.txt
         - intro to and usage guide for the framebuffer console (fbcon).
+fbcondecor.txt
+        - info on the Framebuffer Console Decoration
 framebuffer.txt
         - introduction to frame buffer devices.
 gxfb.txt

new file Documentation/fb/fbcondecor.txt

@@ +1 @@
+What is it?
+-----------
+
+The framebuffer decorations are a kernel feature which allows displaying a
+background picture on selected consoles.
+
+What do I need to get it to work?
+---------------------------------
+
+To get fbcondecor up-and-running you will have to:
+ 1) get a copy of splashutils [1] or a similar program
+ 2) get some fbcondecor themes
+ 3) build the kernel helper program
+ 4) build your kernel with the FB_CON_DECOR option enabled.
+
+To get fbcondecor operational right after fbcon initialization is finished, you
+will have to include a theme and the kernel helper into your initramfs image.
+Please refer to splashutils documentation for instructions on how to do that.
+
+[1] The splashutils package can be downloaded from:
+    http://github.com/alanhaggai/fbsplash
+
+The userspace helper
+--------------------
+
+The userspace fbcondecor helper (by default: /sbin/fbcondecor_helper) is called by the
+kernel whenever an important event occurs and the kernel needs some kind of
+job to be carried out. Important events include console switches and video
+mode switches (the kernel requests background images and configuration
+parameters for the current console). The fbcondecor helper must be accessible at
+all times. If it's not, fbcondecor will be switched off automatically.
+
+It's possible to set path to the fbcondecor helper by writing it to
+/proc/sys/kernel/fbcondecor.
+
+*****************************************************************************
+
+The information below is mostly technical stuff. There's probably no need to
+read it unless you plan to develop a userspace helper.
+
+The fbcondecor protocol
+-----------------------
+
+The fbcondecor protocol defines a communication interface between the kernel and
+the userspace fbcondecor helper.
+
+The kernel side is responsible for:
+
+ * rendering console text, using an image as a background (instead of a
+   standard solid color fbcon uses),
+ * accepting commands from the user via ioctls on the fbcondecor device,
+ * calling the userspace helper to set things up as soon as the fb subsystem
+   is initialized.
+
+The userspace helper is responsible for everything else, including parsing
+configuration files, decompressing the image files whenever the kernel needs
+it, and communicating with the kernel if necessary.
+
+The fbcondecor protocol specifies how communication is done in both ways:
+kernel->userspace and userspace->helper.
+
+Kernel -> Userspace
+-------------------
+
+The kernel communicates with the userspace helper by calling it and specifying
+the task to be done in a series of arguments.
+
+The arguments follow the pattern:
+<fbcondecor protocol version> <command> <parameters>
+
+All commands defined in fbcondecor protocol v2 have the following parameters:
+ virtual console
+ framebuffer number
+ theme
+
+Fbcondecor protocol v1 specified an additional 'fbcondecor mode' after the
+framebuffer number. Fbcondecor protocol v1 is deprecated and should not be used.
+
+Fbcondecor protocol v2 specifies the following commands:
+
+getpic
+------
+ The kernel issues this command to request image data. It's up to the
+ userspace  helper to find a background image appropriate for the specified
+ theme and the current resolution. The userspace helper should respond by
+ issuing the FBIOCONDECOR_SETPIC ioctl.
+
+init
+----
+ The kernel issues this command after the fbcondecor device is created and
+ the fbcondecor interface is initialized. Upon receiving 'init', the userspace
+ helper should parse the kernel command line (/proc/cmdline) or otherwise
+ decide whether fbcondecor is to be activated.
+
+ To activate fbcondecor on the first console the helper should issue the
+ FBIOCONDECOR_SETCFG, FBIOCONDECOR_SETPIC and FBIOCONDECOR_SETSTATE commands,
+ in the above-mentioned order.
+
+ When the userspace helper is called in an early phase of the boot process
+ (right after the initialization of fbcon), no filesystems will be mounted.
+ The helper program should mount sysfs and then create the appropriate
+ framebuffer, fbcondecor and tty0 devices (if they don't already exist) to get
+ current display settings and to be able to communicate with the kernel side.
+ It should probably also mount the procfs to be able to parse the kernel
+ command line parameters.
+
+ Note that the console sem is not held when the kernel calls fbcondecor_helper
+ with the 'init' command. The fbcondecor helper should perform all ioctls with
+ origin set to FBCON_DECOR_IO_ORIG_USER.
+
+modechange
+----------
+ The kernel issues this command on a mode change. The helper's response should
+ be similar to the response to the 'init' command. Note that this time the
+ console sem is held and all ioctls must be performed with origin set to
+ FBCON_DECOR_IO_ORIG_KERNEL.
+
+
+Userspace -> Kernel
+-------------------
+
+Userspace programs can communicate with fbcondecor via ioctls on the
+fbcondecor device. These ioctls are to be used by both the userspace helper
+(called only by the kernel) and userspace configuration tools (run by the users).
+
+The fbcondecor helper should set the origin field to FBCON_DECOR_IO_ORIG_KERNEL
+when doing the appropriate ioctls. All userspace configuration tools should
+use FBCON_DECOR_IO_ORIG_USER. Failure to set the appropriate value in the origin
+field when performing ioctls from the kernel helper will most likely result
+in a console deadlock.
+
+FBCON_DECOR_IO_ORIG_KERNEL instructs fbcondecor not to try to acquire the console
+semaphore. Not surprisingly, FBCON_DECOR_IO_ORIG_USER instructs it to acquire
+the console sem.
+
+The framebuffer console decoration provides the following ioctls (all defined in
+linux/fb.h):
+
+FBIOCONDECOR_SETPIC
+description: loads a background picture for a virtual console
+argument: struct fbcon_decor_iowrapper*; data: struct fb_image*
+notes:
+If called for consoles other than the current foreground one, the picture data
+will be ignored.
+
+If the current virtual console is running in a 8-bpp mode, the cmap substruct
+of fb_image has to be filled appropriately: start should be set to 16 (first
+16 colors are reserved for fbcon), len to a value <= 240 and red, green and
+blue should point to valid cmap data. The transp field is ingored. The fields
+dx, dy, bg_color, fg_color in fb_image are ignored as well.
+
+FBIOCONDECOR_SETCFG
+description: sets the fbcondecor config for a virtual console
+argument: struct fbcon_decor_iowrapper*; data: struct vc_decor*
+notes: The structure has to be filled with valid data.
+
+FBIOCONDECOR_GETCFG
+description: gets the fbcondecor config for a virtual console
+argument: struct fbcon_decor_iowrapper*; data: struct vc_decor*
+
+FBIOCONDECOR_SETSTATE
+description: sets the fbcondecor state for a virtual console
+argument: struct fbcon_decor_iowrapper*; data: unsigned int*
+          values: 0 = disabled, 1 = enabled.
+
+FBIOCONDECOR_GETSTATE
+description: gets the fbcondecor state for a virtual console
+argument: struct fbcon_decor_iowrapper*; data: unsigned int*
+          values: as in FBIOCONDECOR_SETSTATE
+
+Info on used structures:
+
+Definition of struct vc_decor can be found in linux/console_decor.h. It's
+heavily commented. Note that the 'theme' field should point to a string
+no longer than FBCON_DECOR_THEME_LEN. When FBIOCONDECOR_GETCFG call is
+performed, the theme field should point to a char buffer of length
+FBCON_DECOR_THEME_LEN.
+
+Definition of struct fbcon_decor_iowrapper can be found in linux/fb.h.
+The fields in this struct have the following meaning:
+
+vc:
+Virtual console number.
+
+origin:
+Specifies if the ioctl is performed as a response to a kernel request. The
+fbcondecor helper should set this field to FBCON_DECOR_IO_ORIG_KERNEL, userspace
+programs should set it to FBCON_DECOR_IO_ORIG_USER. This field is necessary to
+avoid console semaphore deadlocks.
+
+data:
+Pointer to a data structure appropriate for the performed ioctl. Type of
+the data struct is specified in the ioctls description.
+
+*****************************************************************************
+
+Credit
+------
+
+Original 'bootsplash' project & implementation by:
+  Volker Poplawski <volker@poplawski.de>, Stefan Reinauer <stepan@suse.de>,
+  Steffen Winterfeldt <snwint@suse.de>, Michael Schroeder <mls@suse.de>,
+  Ken Wimer <wimer@suse.de>.
+
+Fbcondecor, fbcondecor protocol design, current implementation & docs by:
+  Michal Januszewski <michalj+fbcondecor@gmail.com>
+

drivers/Makefile

@@ -23 +23 @@
 
 obj-$(CONFIG_PARISC)            += parisc/
 obj-$(CONFIG_RAPIDIO)           += rapidio/
+# tty/ comes before char/ so that the VT console is the boot-time
+# default.
+obj-y                           += tty/
+obj-y                           += char/
 obj-y                           += video/
 obj-y                           += idle/
 
@@ -53 +57 @@
 # reset controllers early, since gpu drivers might rely on them to initialize
 obj-$(CONFIG_RESET_CONTROLLER)  += reset/
 
-# tty/ comes before char/ so that the VT console is the boot-time
-# default.
-obj-y                           += tty/
-obj-y                           += char/
-
 # iommu/ comes before gpu as gpu are using iommu controllers
 obj-$(CONFIG_IOMMU_SUPPORT)     += iommu/
 

drivers/video/console/Kconfig

@@ -151 +151 @@
          such that other users of the framebuffer will remain normally
          oriented.
 
+config FB_CON_DECOR
+        bool "Support for the Framebuffer Console Decorations"
+        depends on FRAMEBUFFER_CONSOLE=y && !FB_TILEBLITTING
+        default n
+        ---help---
+          This option enables support for framebuffer console decorations which
+          makes it possible to display images in the background of the system
+          consoles.  Note that userspace utilities are necessary in order to take
+          advantage of these features. Refer to Documentation/fb/fbcondecor.txt
+          for more information.
+
+          If unsure, say N.
+
 config STI_CONSOLE
         bool "STI text console"
         depends on PARISC

drivers/video/console/Makefile

@@ -9 +9 @@
 obj-$(CONFIG_VGA_CONSOLE)         += vgacon.o
 obj-$(CONFIG_MDA_CONSOLE)         += mdacon.o
 
+obj-$(CONFIG_FB_CON_DECOR)        += fbcondecor.o cfbcondecor.o
 obj-$(CONFIG_FB_STI)              += sticore.o

new file drivers/video/console/cfbcondecor.c

@@ +1 @@
+/*
+ *  linux/drivers/video/cfbcon_decor.c -- Framebuffer decor render functions
+ *
+ *  Copyright (C) 2004 Michal Januszewski <michalj+fbcondecor@gmail.com>
+ *
+ *  Code based upon "Bootdecor" (C) 2001-2003
+ *       Volker Poplawski <volker@poplawski.de>,
+ *       Stefan Reinauer <stepan@suse.de>,
+ *       Steffen Winterfeldt <snwint@suse.de>,
+ *       Michael Schroeder <mls@suse.de>,
+ *       Ken Wimer <wimer@suse.de>.
+ *
+ *  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/module.h>
+#include <linux/types.h>
+#include <linux/fb.h>
+#include <linux/selection.h>
+#include <linux/slab.h>
+#include <linux/vt_kern.h>
+#include <asm/irq.h>
+
+#include "../fbdev/core/fbcon.h"
+#include "fbcondecor.h"
+
+#define parse_pixel(shift, bpp, type)                                           \
+        do {                                                                    \
+                if (d & (0x80 >> (shift)))                                      \
+                        dd2[(shift)] = fgx;                                     \
+                else                                                            \
+                        dd2[(shift)] = transparent ? *(type *)decor_src : bgx;  \
+                decor_src += (bpp);                                             \
+        } while (0)                                                             \
+
+extern int get_color(struct vc_data *vc, struct fb_info *info,
+                     u16 c, int is_fg);
+
+void fbcon_decor_fix_pseudo_pal(struct fb_info *info, struct vc_data *vc)
+{
+        int i, j, k;
+        int minlen = min(min(info->var.red.length, info->var.green.length),
+                             info->var.blue.length);
+        u32 col;
+
+        for (j = i = 0; i < 16; i++) {
+                k = color_table[i];
+
+                col = ((vc->vc_palette[j++]  >> (8-minlen))
+                        << info->var.red.offset);
+                col |= ((vc->vc_palette[j++] >> (8-minlen))
+                        << info->var.green.offset);
+                col |= ((vc->vc_palette[j++] >> (8-minlen))
+                        << info->var.blue.offset);
+                        ((u32 *)info->pseudo_palette)[k] = col;
+        }
+}
+
+void fbcon_decor_renderc(struct fb_info *info, int ypos, int xpos, int height,
+                      int width, u8 *src, u32 fgx, u32 bgx, u8 transparent)
+{
+        unsigned int x, y;
+        u32 dd;
+        int bytespp = ((info->var.bits_per_pixel + 7) >> 3);
+        unsigned int d = ypos * info->fix.line_length + xpos * bytespp;
+        unsigned int ds = (ypos * info->var.xres + xpos) * bytespp;
+        u16 dd2[4];
+
+        u8 *decor_src = (u8 *)(info->bgdecor.data + ds);
+        u8 *dst = (u8 *)(info->screen_base + d);
+
+        if ((ypos + height) > info->var.yres || (xpos + width) > info->var.xres)
+                return;
+
+        for (y = 0; y < height; y++) {
+                switch (info->var.bits_per_pixel) {
+
+                case 32:
+                        for (x = 0; x < width; x++) {
+
+                                if ((x & 7) == 0)
+                                        d = *src++;
+                                if (d & 0x80)
+                                        dd = fgx;
+                                else
+                                        dd = transparent ?
+                                             *(u32 *)decor_src : bgx;
+
+                                d <<= 1;
+                                decor_src += 4;
+                                fb_writel(dd, dst);
+                                dst += 4;
+                        }
+                        break;
+                case 24:
+                        for (x = 0; x < width; x++) {
+
+                                if ((x & 7) == 0)
+                                        d = *src++;
+                                if (d & 0x80)
+                                        dd = fgx;
+                                else
+                                        dd = transparent ?
+                                             (*(u32 *)decor_src & 0xffffff) : bgx;
+
+                                d <<= 1;
+                                decor_src += 3;
+#ifdef __LITTLE_ENDIAN
+                                fb_writew(dd & 0xffff, dst);
+                                dst += 2;
+                                fb_writeb((dd >> 16), dst);
+#else
+                                fb_writew(dd >> 8, dst);
+                                dst += 2;
+                                fb_writeb(dd & 0xff, dst);
+#endif
+                                dst++;
+                        }
+                        break;
+                case 16:
+                        for (x = 0; x < width; x += 2) {
+                                if ((x & 7) == 0)
+                                        d = *src++;
+
+                                parse_pixel(0, 2, u16);
+                                parse_pixel(1, 2, u16);
+#ifdef __LITTLE_ENDIAN
+                                dd = dd2[0] | (dd2[1] << 16);
+#else
+                                dd = dd2[1] | (dd2[0] << 16);
+#endif
+                                d <<= 2;
+                                fb_writel(dd, dst);
+                                dst += 4;
+                        }
+                        break;
+
+                case 8:
+                        for (x = 0; x < width; x += 4) {
+                                if ((x & 7) == 0)
+                                        d = *src++;
+
+                                parse_pixel(0, 1, u8);
+                                parse_pixel(1, 1, u8);
+                                parse_pixel(2, 1, u8);
+                                parse_pixel(3, 1, u8);
+
+#ifdef __LITTLE_ENDIAN
+                                dd = dd2[0] | (dd2[1] << 8) | (dd2[2] << 16) | (dd2[3] << 24);
+#else
+                                dd = dd2[3] | (dd2[2] << 8) | (dd2[1] << 16) | (dd2[0] << 24);
+#endif
+                                d <<= 4;
+                                fb_writel(dd, dst);
+                                dst += 4;
+                        }
+                }
+
+                dst += info->fix.line_length - width * bytespp;
+                decor_src += (info->var.xres - width) * bytespp;
+        }
+}
+
+#define cc2cx(a)                                                \
+        ((info->fix.visual == FB_VISUAL_TRUECOLOR ||            \
+                info->fix.visual == FB_VISUAL_DIRECTCOLOR) ?    \
+                        ((u32 *)info->pseudo_palette)[a] : a)
+
+void fbcon_decor_putcs(struct vc_data *vc, struct fb_info *info,
+                   const unsigned short *s, int count, int yy, int xx)
+{
+        unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+        struct fbcon_ops *ops = info->fbcon_par;
+        int fg_color, bg_color, transparent;
+        u8 *src;
+        u32 bgx, fgx;
+        u16 c = scr_readw(s);
+
+        fg_color = get_color(vc, info, c, 1);
+        bg_color = get_color(vc, info, c, 0);
+
+        /* Don't paint the background image if console is blanked */
+        transparent = ops->blank_state ? 0 :
+                (vc->vc_decor.bg_color == bg_color);
+
+        xx = xx * vc->vc_font.width + vc->vc_decor.tx;
+        yy = yy * vc->vc_font.height + vc->vc_decor.ty;
+
+        fgx = cc2cx(fg_color);
+        bgx = cc2cx(bg_color);
+
+        while (count--) {
+                c = scr_readw(s++);
+                src = vc->vc_font.data + (c & charmask) * vc->vc_font.height *
+                      ((vc->vc_font.width + 7) >> 3);
+
+                fbcon_decor_renderc(info, yy, xx, vc->vc_font.height,
+                               vc->vc_font.width, src, fgx, bgx, transparent);
+                xx += vc->vc_font.width;
+        }
+}
+
+void fbcon_decor_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+        int i;
+        unsigned int dsize, s_pitch;
+        struct fbcon_ops *ops = info->fbcon_par;
+        struct vc_data *vc;
+        u8 *src;
+
+        /* we really don't need any cursors while the console is blanked */
+        if (info->state != FBINFO_STATE_RUNNING || ops->blank_state)
+                return;
+
+        vc = vc_cons[ops->currcon].d;
+
+        src = kmalloc(64 + sizeof(struct fb_image), GFP_ATOMIC);
+        if (!src)
+                return;
+
+        s_pitch = (cursor->image.width + 7) >> 3;
+        dsize = s_pitch * cursor->image.height;
+        if (cursor->enable) {
+                switch (cursor->rop) {
+                case ROP_XOR:
+                        for (i = 0; i < dsize; i++)
+                                src[i] = cursor->image.data[i] ^ cursor->mask[i];
+                        break;
+                case ROP_COPY:
+                default:
+                        for (i = 0; i < dsize; i++)
+                                src[i] = cursor->image.data[i] & cursor->mask[i];
+                        break;
+                }
+        } else
+                memcpy(src, cursor->image.data, dsize);
+
+        fbcon_decor_renderc(info,
+                        cursor->image.dy + vc->vc_decor.ty,
+                        cursor->image.dx + vc->vc_decor.tx,
+                        cursor->image.height,
+                        cursor->image.width,
+                        (u8 *)src,
+                        cc2cx(cursor->image.fg_color),
+                        cc2cx(cursor->image.bg_color),
+                        cursor->image.bg_color == vc->vc_decor.bg_color);
+
+        kfree(src);
+}
+
+static void decorset(u8 *dst, int height, int width, int dstbytes,
+                                u32 bgx, int bpp)
+{
+        int i;
+
+        if (bpp == 8)
+                bgx |= bgx << 8;
+        if (bpp == 16 || bpp == 8)
+                bgx |= bgx << 16;
+
+        while (height-- > 0) {
+                u8 *p = dst;
+
+                switch (bpp) {
+
+                case 32:
+                        for (i = 0; i < width; i++) {
+                                fb_writel(bgx, p); p += 4;
+                        }
+                        break;
+                case 24:
+                        for (i = 0; i < width; i++) {
+#ifdef __LITTLE_ENDIAN
+                                fb_writew((bgx & 0xffff), (u16 *)p); p += 2;
+                                fb_writeb((bgx >> 16), p++);
+#else
+                                fb_writew((bgx >> 8), (u16 *)p); p += 2;
+                                fb_writeb((bgx & 0xff), p++);
+#endif
+                        }
+                        break;
+                case 16:
+                        for (i = 0; i < width/4; i++) {
+                                fb_writel(bgx, p); p += 4;
+                                fb_writel(bgx, p); p += 4;
+                        }
+                        if (width & 2) {
+                                fb_writel(bgx, p); p += 4;
+                        }
+                        if (width & 1)
+                                fb_writew(bgx, (u16 *)p);
+                        break;
+                case 8:
+                        for (i = 0; i < width/4; i++) {
+                                fb_writel(bgx, p); p += 4;
+                        }
+
+                        if (width & 2) {
+                                fb_writew(bgx, p); p += 2;
+                        }
+                        if (width & 1)
+                                fb_writeb(bgx, (u8 *)p);
+                        break;
+
+                }
+                dst += dstbytes;
+        }
+}
+
+void fbcon_decor_copy(u8 *dst, u8 *src, int height, int width, int linebytes,
+                   int srclinebytes, int bpp)
+{
+        int i;
+
+        while (height-- > 0) {
+                u32 *p = (u32 *)dst;
+                u32 *q = (u32 *)src;
+
+                switch (bpp) {
+
+                case 32:
+                        for (i = 0; i < width; i++)
+                                fb_writel(*q++, p++);
+                        break;
+                case 24:
+                        for (i = 0; i < (width * 3 / 4); i++)
+                                fb_writel(*q++, p++);
+                        if ((width * 3) % 4) {
+                                if (width & 2) {
+                                        fb_writeb(*(u8 *)q, (u8 *)p);
+                                } else if (width & 1) {
+                                        fb_writew(*(u16 *)q, (u16 *)p);
+                                        fb_writeb(*(u8 *)((u16 *)q + 1),
+                                                        (u8 *)((u16 *)p + 2));
+                                }
+                        }
+                        break;
+                case 16:
+                        for (i = 0; i < width/4; i++) {
+                                fb_writel(*q++, p++);
+                                fb_writel(*q++, p++);
+                        }
+                        if (width & 2)
+                                fb_writel(*q++, p++);
+                        if (width & 1)
+                                fb_writew(*(u16 *)q, (u16 *)p);
+                        break;
+                case 8:
+                        for (i = 0; i < width/4; i++)
+                                fb_writel(*q++, p++);
+
+                        if (width & 2) {
+                                fb_writew(*(u16 *)q, (u16 *)p);
+                                q = (u32 *) ((u16 *)q + 1);
+                                p = (u32 *) ((u16 *)p + 1);
+                        }
+                        if (width & 1)
+                                fb_writeb(*(u8 *)q, (u8 *)p);
+                        break;
+                }
+
+                dst += linebytes;
+                src += srclinebytes;
+        }
+}
+
+static void decorfill(struct fb_info *info, int sy, int sx, int height,
+                       int width)
+{
+        int bytespp = ((info->var.bits_per_pixel + 7) >> 3);
+        int d  = sy * info->fix.line_length + sx * bytespp;
+        int ds = (sy * info->var.xres + sx) * bytespp;
+
+        fbcon_decor_copy((u8 *)(info->screen_base + d), (u8 *)(info->bgdecor.data + ds),
+                    height, width, info->fix.line_length, info->var.xres * bytespp,
+                    info->var.bits_per_pixel);
+}
+
+void fbcon_decor_clear(struct vc_data *vc, struct fb_info *info, int sy, int sx,
+                    int height, int width)
+{
+        int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
+        struct fbcon_ops *ops = info->fbcon_par;
+        u8 *dst;
+        int transparent, bg_color = attr_bgcol_ec(bgshift, vc, info);
+
+        transparent = (vc->vc_decor.bg_color == bg_color);
+        sy = sy * vc->vc_font.height + vc->vc_decor.ty;
+        sx = sx * vc->vc_font.width + vc->vc_decor.tx;
+        height *= vc->vc_font.height;
+        width *= vc->vc_font.width;
+
+        /* Don't paint the background image if console is blanked */
+        if (transparent && !ops->blank_state) {
+                decorfill(info, sy, sx, height, width);
+        } else {
+                dst = (u8 *)(info->screen_base + sy * info->fix.line_length +
+                             sx * ((info->var.bits_per_pixel + 7) >> 3));
+                decorset(dst, height, width, info->fix.line_length, cc2cx(bg_color),
+                          info->var.bits_per_pixel);
+        }
+}
+
+void fbcon_decor_clear_margins(struct vc_data *vc, struct fb_info *info,
+                            int bottom_only)
+{
+        unsigned int tw = vc->vc_cols*vc->vc_font.width;
+        unsigned int th = vc->vc_rows*vc->vc_font.height;
+
+        if (!bottom_only) {
+                /* top margin */
+                decorfill(info, 0, 0, vc->vc_decor.ty, info->var.xres);
+                /* left margin */
+                decorfill(info, vc->vc_decor.ty, 0, th, vc->vc_decor.tx);
+                /* right margin */
+                decorfill(info, vc->vc_decor.ty, vc->vc_decor.tx + tw, th,
+                           info->var.xres - vc->vc_decor.tx - tw);
+        }
+        decorfill(info, vc->vc_decor.ty + th, 0,
+                   info->var.yres - vc->vc_decor.ty - th, info->var.xres);
+}
+
+void fbcon_decor_bmove_redraw(struct vc_data *vc, struct fb_info *info, int y,
+                           int sx, int dx, int width)
+{
+        u16 *d = (u16 *) (vc->vc_origin + vc->vc_size_row * y + dx * 2);
+        u16 *s = d + (dx - sx);
+        u16 *start = d;
+        u16 *ls = d;
+        u16 *le = d + width;
+        u16 c;
+        int x = dx;
+        u16 attr = 1;
+
+        do {
+                c = scr_readw(d);
+                if (attr != (c & 0xff00)) {
+                        attr = c & 0xff00;
+                        if (d > start) {
+                                fbcon_decor_putcs(vc, info, start, d - start, y, x);
+                                x += d - start;
+                                start = d;
+                        }
+                }
+                if (s >= ls && s < le && c == scr_readw(s)) {
+                        if (d > start) {
+                                fbcon_decor_putcs(vc, info, start, d - start, y, x);
+                                x += d - start + 1;
+                                start = d + 1;
+                        } else {
+                                x++;
+                                start++;
+                        }
+                }
+                s++;
+                d++;
+        } while (d < le);
+        if (d > start)
+                fbcon_decor_putcs(vc, info, start, d - start, y, x);
+}
+
+void fbcon_decor_blank(struct vc_data *vc, struct fb_info *info, int blank)
+{
+        if (blank) {
+                decorset((u8 *)info->screen_base, info->var.yres, info->var.xres,
+                          info->fix.line_length, 0, info->var.bits_per_pixel);
+        } else {
+                update_screen(vc);
+                fbcon_decor_clear_margins(vc, info, 0);
+        }
+}
+

new file drivers/video/console/fbcondecor.c

@@ +1 @@
+/*
+ *  linux/drivers/video/console/fbcondecor.c -- Framebuffer console decorations
+ *
+ *  Copyright (C) 2004-2009 Michal Januszewski <michalj+fbcondecor@gmail.com>
+ *
+ *  Code based upon "Bootsplash" (C) 2001-2003
+ *       Volker Poplawski <volker@poplawski.de>,
+ *       Stefan Reinauer <stepan@suse.de>,
+ *       Steffen Winterfeldt <snwint@suse.de>,
+ *       Michael Schroeder <mls@suse.de>,
+ *       Ken Wimer <wimer@suse.de>.
+ *
+ *  Compat ioctl support by Thorsten Klein <TK@Thorsten-Klein.de>.
+ *
+ *  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/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/fb.h>
+#include <linux/vt_kern.h>
+#include <linux/vmalloc.h>
+#include <linux/unistd.h>
+#include <linux/syscalls.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/workqueue.h>
+#include <linux/kmod.h>
+#include <linux/miscdevice.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/compat.h>
+#include <linux/console.h>
+#include <linux/binfmts.h>
+#include <linux/uaccess.h>
+#include <asm/irq.h>
+
+#include "../fbdev/core/fbcon.h"
+#include "fbcondecor.h"
+
+extern signed char con2fb_map[];
+static int fbcon_decor_enable(struct vc_data *vc);
+
+static int initialized;
+
+char fbcon_decor_path[KMOD_PATH_LEN] = "/sbin/fbcondecor_helper";
+EXPORT_SYMBOL(fbcon_decor_path);
+
+int fbcon_decor_call_helper(char *cmd, unsigned short vc)
+{
+        char *envp[] = {
+                "HOME=/",
+                "PATH=/sbin:/bin",
+                NULL
+        };
+
+        char tfb[5];
+        char tcons[5];
+        unsigned char fb = (int) con2fb_map[vc];
+
+        char *argv[] = {
+                fbcon_decor_path,
+                "2",
+                cmd,
+                tcons,
+                tfb,
+                vc_cons[vc].d->vc_decor.theme,
+                NULL
+        };
+
+        snprintf(tfb, 5, "%d", fb);
+        snprintf(tcons, 5, "%d", vc);
+
+        return call_usermodehelper(fbcon_decor_path, argv, envp, UMH_WAIT_EXEC);
+}
+
+/* Disables fbcondecor on a virtual console; called with console sem held. */
+int fbcon_decor_disable(struct vc_data *vc, unsigned char redraw)
+{
+        struct fb_info *info;
+
+        if (!vc->vc_decor.state)
+                return -EINVAL;
+
+        info = registered_fb[(int) con2fb_map[vc->vc_num]];
+
+        if (info == NULL)
+                return -EINVAL;
+
+        vc->vc_decor.state = 0;
+        vc_resize(vc, info->var.xres / vc->vc_font.width,
+                  info->var.yres / vc->vc_font.height);
+
+        if (fg_console == vc->vc_num && redraw) {
+                redraw_screen(vc, 0);
+                update_region(vc, vc->vc_origin +
+                              vc->vc_size_row * vc->vc_top,
+                              vc->vc_size_row * (vc->vc_bottom - vc->vc_top) / 2);
+        }
+
+        printk(KERN_INFO "fbcondecor: switched decor state to 'off' on console %d\n",
+                         vc->vc_num);
+
+        return 0;
+}
+
+/* Enables fbcondecor on a virtual console; called with console sem held. */
+static int fbcon_decor_enable(struct vc_data *vc)
+{
+        struct fb_info *info;
+
+        info = registered_fb[(int) con2fb_map[vc->vc_num]];
+
+        if (vc->vc_decor.twidth == 0 || vc->vc_decor.theight == 0 ||
+            info == NULL || vc->vc_decor.state || (!info->bgdecor.data &&
+            vc->vc_num == fg_console))
+                return -EINVAL;
+
+        vc->vc_decor.state = 1;
+        vc_resize(vc, vc->vc_decor.twidth / vc->vc_font.width,
+                  vc->vc_decor.theight / vc->vc_font.height);
+
+        if (fg_console == vc->vc_num) {
+                redraw_screen(vc, 0);
+                update_region(vc, vc->vc_origin +
+                              vc->vc_size_row * vc->vc_top,
+                              vc->vc_size_row * (vc->vc_bottom - vc->vc_top) / 2);
+                fbcon_decor_clear_margins(vc, info, 0);
+        }
+
+        printk(KERN_INFO "fbcondecor: switched decor state to 'on' on console %d\n",
+                         vc->vc_num);
+
+        return 0;
+}
+
+static inline int fbcon_decor_ioctl_dosetstate(struct vc_data *vc, unsigned int state, unsigned char origin)
+{
+        int ret;
+
+        console_lock();
+        if (!state)
+                ret = fbcon_decor_disable(vc, 1);
+        else
+                ret = fbcon_decor_enable(vc);
+        console_unlock();
+
+        return ret;
+}
+
+static inline void fbcon_decor_ioctl_dogetstate(struct vc_data *vc, unsigned int *state)
+{
+        *state = vc->vc_decor.state;
+}
+
+static int fbcon_decor_ioctl_dosetcfg(struct vc_data *vc, struct vc_decor *cfg, unsigned char origin)
+{
+        struct fb_info *info;
+        int len;
+        char *tmp;
+
+        info = registered_fb[(int) con2fb_map[vc->vc_num]];
+
+        if (info == NULL || !cfg->twidth || !cfg->theight ||
+            cfg->tx + cfg->twidth  > info->var.xres ||
+            cfg->ty + cfg->theight > info->var.yres)
+                return -EINVAL;
+
+        len = strnlen_user(cfg->theme, MAX_ARG_STRLEN);
+        if (!len || len > FBCON_DECOR_THEME_LEN)
+                return -EINVAL;
+        tmp = kmalloc(len, GFP_KERNEL);
+        if (!tmp)
+                return -ENOMEM;
+        if (copy_from_user(tmp, (void __user *)cfg->theme, len))
+                return -EFAULT;
+        cfg->theme = tmp;
+        cfg->state = 0;
+
+        console_lock();
+        if (vc->vc_decor.state)
+                fbcon_decor_disable(vc, 1);
+        kfree(vc->vc_decor.theme);
+        vc->vc_decor = *cfg;
+        console_unlock();
+
+        printk(KERN_INFO "fbcondecor: console %d using theme '%s'\n",
+                         vc->vc_num, vc->vc_decor.theme);
+        return 0;
+}
+
+static int fbcon_decor_ioctl_dogetcfg(struct vc_data *vc,
+                                        struct vc_decor *decor)
+{
+        char __user *tmp;
+
+        tmp = decor->theme;
+        *decor = vc->vc_decor;
+        decor->theme = tmp;
+
+        if (vc->vc_decor.theme) {
+                if (copy_to_user(tmp, vc->vc_decor.theme,
+                                        strlen(vc->vc_decor.theme) + 1))
+                        return -EFAULT;
+        } else
+                if (put_user(0, tmp))
+                        return -EFAULT;
+
+        return 0;
+}
+
+static int fbcon_decor_ioctl_dosetpic(struct vc_data *vc, struct fb_image *img,
+                                                unsigned char origin)
+{
+        struct fb_info *info;
+        int len;
+        u8 *tmp;
+
+        if (vc->vc_num != fg_console)
+                return -EINVAL;
+
+        info = registered_fb[(int) con2fb_map[vc->vc_num]];
+
+        if (info == NULL)
+                return -EINVAL;
+
+        if (img->width != info->var.xres || img->height != info->var.yres) {
+                printk(KERN_ERR "fbcondecor: picture dimensions mismatch\n");
+                printk(KERN_ERR "%dx%d vs %dx%d\n", img->width, img->height,
+                                info->var.xres, info->var.yres);
+                return -EINVAL;
+        }
+
+        if (img->depth != info->var.bits_per_pixel) {
+                printk(KERN_ERR "fbcondecor: picture depth mismatch\n");
+                return -EINVAL;
+        }
+
+        if (img->depth == 8) {
+                if (!img->cmap.len || !img->cmap.red || !img->cmap.green ||
+                    !img->cmap.blue)
+                        return -EINVAL;
+
+                tmp = vmalloc(img->cmap.len * 3 * 2);
+                if (!tmp)
+                        return -ENOMEM;
+
+                if (copy_from_user(tmp,
+                                (void __user *)img->cmap.red,
+                                                (img->cmap.len << 1)) ||
+                        copy_from_user(tmp + (img->cmap.len << 1),
+                                (void __user *)img->cmap.green,
+                                                (img->cmap.len << 1)) ||
+                        copy_from_user(tmp + (img->cmap.len << 2),
+                                (void __user *)img->cmap.blue,
+                                                (img->cmap.len << 1))) {
+                        vfree(tmp);
+                        return -EFAULT;
+                }
+
+                img->cmap.transp = NULL;
+                img->cmap.red = (u16 *)tmp;
+                img->cmap.green = img->cmap.red + img->cmap.len;
+                img->cmap.blue = img->cmap.green + img->cmap.len;
+        } else {
+                img->cmap.red = NULL;
+        }
+
+        len = ((img->depth + 7) >> 3) * img->width * img->height;
+
+        /*
+         * Allocate an additional byte so that we never go outside of the
+         * buffer boundaries in the rendering functions in a 24 bpp mode.
+         */
+        tmp = vmalloc(len + 1);
+
+        if (!tmp)
+                goto out;
+
+        if (copy_from_user(tmp, (void __user *)img->data, len))
+                goto out;
+
+        img->data = tmp;
+
+        console_lock();
+
+        if (info->bgdecor.data)
+                vfree((u8 *)info->bgdecor.data);
+        if (info->bgdecor.cmap.red)
+                vfree(info->bgdecor.cmap.red);
+
+        info->bgdecor = *img;
+
+        if (fbcon_decor_active_vc(vc) && fg_console == vc->vc_num) {
+                redraw_screen(vc, 0);
+                update_region(vc, vc->vc_origin +
+                              vc->vc_size_row * vc->vc_top,
+                              vc->vc_size_row * (vc->vc_bottom - vc->vc_top) / 2);
+                fbcon_decor_clear_margins(vc, info, 0);
+        }
+
+        console_unlock();
+
+        return 0;
+
+out:
+        if (img->cmap.red)
+                vfree(img->cmap.red);
+
+        if (tmp)
+                vfree(tmp);
+        return -ENOMEM;
+}
+
+static long fbcon_decor_ioctl(struct file *filp, u_int cmd, u_long arg)
+{
+        struct fbcon_decor_iowrapper __user *wrapper = (void __user *) arg;
+        struct vc_data *vc = NULL;
+        unsigned short vc_num = 0;
+        unsigned char origin = 0;
+        void __user *data = NULL;
+
+        if (!access_ok(VERIFY_READ, wrapper,
+                        sizeof(struct fbcon_decor_iowrapper)))
+                return -EFAULT;
+
+        __get_user(vc_num, &wrapper->vc);
+        __get_user(origin, &wrapper->origin);
+        __get_user(data, &wrapper->data);
+
+        if (!vc_cons_allocated(vc_num))
+                return -EINVAL;
+
+        vc = vc_cons[vc_num].d;
+
+        switch (cmd) {
+        case FBIOCONDECOR_SETPIC:
+        {
+                struct fb_image img;
+
+                if (copy_from_user(&img, (struct fb_image __user *)data, sizeof(struct fb_image)))
+                        return -EFAULT;
+
+                return fbcon_decor_ioctl_dosetpic(vc, &img, origin);
+        }
+        case FBIOCONDECOR_SETCFG:
+        {
+                struct vc_decor cfg;
+
+                if (copy_from_user(&cfg, (struct vc_decor __user *)data, sizeof(struct vc_decor)))
+                        return -EFAULT;
+
+                return fbcon_decor_ioctl_dosetcfg(vc, &cfg, origin);
+        }
+        case FBIOCONDECOR_GETCFG:
+        {
+                int rval;
+                struct vc_decor cfg;
+
+                if (copy_from_user(&cfg, (struct vc_decor __user *)data, sizeof(struct vc_decor)))
+                        return -EFAULT;
+
+                rval = fbcon_decor_ioctl_dogetcfg(vc, &cfg);
+
+                if (copy_to_user(data, &cfg, sizeof(struct vc_decor)))
+                        return -EFAULT;
+                return rval;
+        }
+        case FBIOCONDECOR_SETSTATE:
+        {
+                unsigned int state = 0;
+
+                if (get_user(state, (unsigned int __user *)data))
+                        return -EFAULT;
+                return fbcon_decor_ioctl_dosetstate(vc, state, origin);
+        }
+        case FBIOCONDECOR_GETSTATE:
+        {
+                unsigned int state = 0;
+
+                fbcon_decor_ioctl_dogetstate(vc, &state);
+                return put_user(state, (unsigned int __user *)data);
+        }
+
+        default:
+                return -ENOIOCTLCMD;
+        }
+}
+
+#ifdef CONFIG_COMPAT
+
+static long fbcon_decor_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+        struct fbcon_decor_iowrapper32 __user *wrapper = (void __user *)arg;
+        struct vc_data *vc = NULL;
+        unsigned short vc_num = 0;
+        unsigned char origin = 0;
+        compat_uptr_t data_compat = 0;
+        void __user *data = NULL;
+
+        if (!access_ok(VERIFY_READ, wrapper,
+                        sizeof(struct fbcon_decor_iowrapper32)))
+                return -EFAULT;
+
+        __get_user(vc_num, &wrapper->vc);
+        __get_user(origin, &wrapper->origin);
+        __get_user(data_compat, &wrapper->data);
+        data = compat_ptr(data_compat);
+
+        if (!vc_cons_allocated(vc_num))
+                return -EINVAL;
+
+        vc = vc_cons[vc_num].d;
+
+        switch (cmd) {
+        case FBIOCONDECOR_SETPIC32:
+        {
+                struct fb_image32 img_compat;
+                struct fb_image img;
+
+                if (copy_from_user(&img_compat, (struct fb_image32 __user *)data, sizeof(struct fb_image32)))
+                        return -EFAULT;
+
+                fb_image_from_compat(img, img_compat);
+
+                return fbcon_decor_ioctl_dosetpic(vc, &img, origin);
+        }
+
+        case FBIOCONDECOR_SETCFG32:
+        {
+                struct vc_decor32 cfg_compat;
+                struct vc_decor cfg;
+
+                if (copy_from_user(&cfg_compat, (struct vc_decor32 __user *)data, sizeof(struct vc_decor32)))
+                        return -EFAULT;
+
+                vc_decor_from_compat(cfg, cfg_compat);
+
+                return fbcon_decor_ioctl_dosetcfg(vc, &cfg, origin);
+        }
+
+        case FBIOCONDECOR_GETCFG32:
+        {
+                int rval;
+                struct vc_decor32 cfg_compat;
+                struct vc_decor cfg;
+
+                if (copy_from_user(&cfg_compat, (struct vc_decor32 __user *)data, sizeof(struct vc_decor32)))
+                        return -EFAULT;
+                cfg.theme = compat_ptr(cfg_compat.theme);
+
+                rval = fbcon_decor_ioctl_dogetcfg(vc, &cfg);
+
+                vc_decor_to_compat(cfg_compat, cfg);
+
+                if (copy_to_user((struct vc_decor32 __user *)data, &cfg_compat, sizeof(struct vc_decor32)))
+                        return -EFAULT;
+                return rval;
+        }
+
+        case FBIOCONDECOR_SETSTATE32:
+        {
+                compat_uint_t state_compat = 0;
+                unsigned int state = 0;
+
+                if (get_user(state_compat, (compat_uint_t __user *)data))
+                        return -EFAULT;
+
+                state = (unsigned int)state_compat;
+
+                return fbcon_decor_ioctl_dosetstate(vc, state, origin);
+        }
+
+        case FBIOCONDECOR_GETSTATE32:
+        {
+                compat_uint_t state_compat = 0;
+                unsigned int state = 0;
+
+                fbcon_decor_ioctl_dogetstate(vc, &state);
+                state_compat = (compat_uint_t)state;
+
+                return put_user(state_compat, (compat_uint_t __user *)data);
+        }
+
+        default:
+                return -ENOIOCTLCMD;
+        }
+}
+#else
+  #define fbcon_decor_compat_ioctl NULL
+#endif
+
+static struct file_operations fbcon_decor_ops = {
+        .owner = THIS_MODULE,
+        .unlocked_ioctl = fbcon_decor_ioctl,
+        .compat_ioctl = fbcon_decor_compat_ioctl
+};
+
+static struct miscdevice fbcon_decor_dev = {
+        .minor = MISC_DYNAMIC_MINOR,
+        .name = "fbcondecor",
+        .fops = &fbcon_decor_ops
+};
+
+void fbcon_decor_reset(void)
+{
+        int i;
+
+        for (i = 0; i < num_registered_fb; i++) {
+                registered_fb[i]->bgdecor.data = NULL;
+                registered_fb[i]->bgdecor.cmap.red = NULL;
+        }
+
+        for (i = 0; i < MAX_NR_CONSOLES && vc_cons[i].d; i++) {
+                vc_cons[i].d->vc_decor.state = vc_cons[i].d->vc_decor.twidth =
+                                                vc_cons[i].d->vc_decor.theight = 0;
+                vc_cons[i].d->vc_decor.theme = NULL;
+        }
+}
+
+int fbcon_decor_init(void)
+{
+        int i;
+
+        fbcon_decor_reset();
+
+        if (initialized)
+                return 0;
+
+        i = misc_register(&fbcon_decor_dev);
+        if (i) {
+                printk(KERN_ERR "fbcondecor: failed to register device\n");
+                return i;
+        }
+
+        fbcon_decor_call_helper("init", 0);
+        initialized = 1;
+        return 0;
+}
+
+int fbcon_decor_exit(void)
+{
+        fbcon_decor_reset();
+        return 0;
+}

new file drivers/video/console/fbcondecor.h

@@ +1 @@
+/*
+ *  linux/drivers/video/console/fbcondecor.h -- Framebuffer Console Decoration headers
+ *
+ *  Copyright (C) 2004 Michal Januszewski <michalj+fbcondecor@gmail.com>
+ *
+ */
+
+#ifndef __FBCON_DECOR_H
+#define __FBCON_DECOR_H
+
+#ifndef _LINUX_FB_H
+#include <linux/fb.h>
+#endif
+
+/* This is needed for vc_cons in fbcmap.c */
+#include <linux/vt_kern.h>
+
+struct fb_cursor;
+struct fb_info;
+struct vc_data;
+
+#ifdef CONFIG_FB_CON_DECOR
+/* fbcondecor.c */
+int fbcon_decor_init(void);
+int fbcon_decor_exit(void);
+int fbcon_decor_call_helper(char *cmd, unsigned short cons);
+int fbcon_decor_disable(struct vc_data *vc, unsigned char redraw);
+
+/* cfbcondecor.c */
+void fbcon_decor_putcs(struct vc_data *vc, struct fb_info *info, const unsigned short *s, int count, int yy, int xx);
+void fbcon_decor_cursor(struct fb_info *info, struct fb_cursor *cursor);
+void fbcon_decor_clear(struct vc_data *vc, struct fb_info *info, int sy, int sx, int height, int width);
+void fbcon_decor_clear_margins(struct vc_data *vc, struct fb_info *info, int bottom_only);
+void fbcon_decor_blank(struct vc_data *vc, struct fb_info *info, int blank);
+void fbcon_decor_bmove_redraw(struct vc_data *vc, struct fb_info *info, int y, int sx, int dx, int width);
+void fbcon_decor_copy(u8 *dst, u8 *src, int height, int width, int linebytes, int srclinesbytes, int bpp);
+void fbcon_decor_fix_pseudo_pal(struct fb_info *info, struct vc_data *vc);
+
+/* vt.c */
+void acquire_console_sem(void);
+void release_console_sem(void);
+void do_unblank_screen(int entering_gfx);
+
+/* struct vc_data *y */
+#define fbcon_decor_active_vc(y) (y->vc_decor.state && y->vc_decor.theme)
+
+/* struct fb_info *x, struct vc_data *y */
+#define fbcon_decor_active_nores(x, y) (x->bgdecor.data && fbcon_decor_active_vc(y))
+
+/* struct fb_info *x, struct vc_data *y */
+#define fbcon_decor_active(x, y) (fbcon_decor_active_nores(x, y) &&     \
+                                x->bgdecor.width == x->var.xres &&      \
+                                x->bgdecor.height == x->var.yres &&     \
+                                x->bgdecor.depth == x->var.bits_per_pixel)
+
+#else /* CONFIG_FB_CON_DECOR */
+
+static inline void fbcon_decor_putcs(struct vc_data *vc, struct fb_info *info, const unsigned short *s, int count, int yy, int xx) {}
+static inline void fbcon_decor_putc(struct vc_data *vc, struct fb_info *info, int c, int ypos, int xpos) {}
+static inline void fbcon_decor_cursor(struct fb_info *info, struct fb_cursor *cursor) {}
+static inline void fbcon_decor_clear(struct vc_data *vc, struct fb_info *info, int sy, int sx, int height, int width) {}
+static inline void fbcon_decor_clear_margins(struct vc_data *vc, struct fb_info *info, int bottom_only) {}
+static inline void fbcon_decor_blank(struct vc_data *vc, struct fb_info *info, int blank) {}
+static inline void fbcon_decor_bmove_redraw(struct vc_data *vc, struct fb_info *info, int y, int sx, int dx, int width) {}
+static inline void fbcon_decor_fix_pseudo_pal(struct fb_info *info, struct vc_data *vc) {}
+static inline int fbcon_decor_call_helper(char *cmd, unsigned short cons) { return 0; }
+static inline int fbcon_decor_init(void) { return 0; }
+static inline int fbcon_decor_exit(void) { return 0; }
+static inline int fbcon_decor_disable(struct vc_data *vc, unsigned char redraw) { return 0; }
+
+#define fbcon_decor_active_vc(y) (0)
+#define fbcon_decor_active_nores(x, y) (0)
+#define fbcon_decor_active(x, y) (0)
+
+#endif /* CONFIG_FB_CON_DECOR */
+
+#endif /* __FBCON_DECOR_H */

drivers/video/fbdev/Kconfig

@@ -1226 +1226 @@
         select FB_CFB_FILLRECT
         select FB_CFB_COPYAREA
         select FB_CFB_IMAGEBLIT
-        select FB_TILEBLITTING
         select FB_MACMODES if PPC_PMAC
         ---help---
           Say Y here if you have a Matrox Millennium, Matrox Millennium II,

drivers/video/fbdev/core/bitblit.c

@@ -18 +18 @@
 #include <linux/console.h>
 #include <asm/types.h>
 #include "fbcon.h"
+#include "../../console/fbcondecor.h"
 
 /*
  * Accelerated handlers.
@@ -55 +56 @@
         area.height = height * vc->vc_font.height;
         area.width = width * vc->vc_font.width;
 
+        if (fbcon_decor_active(info, vc)) {
+                area.sx += vc->vc_decor.tx;
+                area.sy += vc->vc_decor.ty;
+                area.dx += vc->vc_decor.tx;
+                area.dy += vc->vc_decor.ty;
+        }
+
         info->fbops->fb_copyarea(info, &area);
 }
 
@@ -379 +387 @@
         cursor.image.depth = 1;
         cursor.rop = ROP_XOR;
 
-        if (info->fbops->fb_cursor)
-                err = info->fbops->fb_cursor(info, &cursor);
+        if (fbcon_decor_active(info, vc)) {
+                fbcon_decor_cursor(info, &cursor);
+        } else {
+                if (info->fbops->fb_cursor)
+                        err = info->fbops->fb_cursor(info, &cursor);
 
-        if (err)
-                soft_cursor(info, &cursor);
+                if (err)
+                        soft_cursor(info, &cursor);
+        }
 
         ops->cursor_reset = 0;
 }

drivers/video/fbdev/core/fbcmap.c

@@ -17 +17 @@
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 
+#include "../../console/fbcondecor.h"
+
 static u16 red2[] __read_mostly = {
     0x0000, 0xaaaa
 };
@@ -256 +258 @@
                                 break;
                 }
         }
-        if (rc == 0)
+        if (rc == 0) {
                 fb_copy_cmap(cmap, &info->cmap);
-
+                if (fbcon_decor_active(info, vc_cons[fg_console].d) &&
+                    info->fix.visual == FB_VISUAL_DIRECTCOLOR)
+                        fbcon_decor_fix_pseudo_pal(info, vc_cons[fg_console].d);
+        }
         return rc;
 }
 

drivers/video/fbdev/core/fbcon.c

@@ -80 +80 @@
 #include <asm/irq.h>
 
 #include "fbcon.h"
+#include "../../console/fbcondecor.h"
 
 #ifdef FBCONDEBUG
 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
@@ -95 +96 @@
 
 static struct display fb_display[MAX_NR_CONSOLES];
 
-static signed char con2fb_map[MAX_NR_CONSOLES];
+signed char con2fb_map[MAX_NR_CONSOLES];
 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 
 static int logo_lines;
@@ -282 +283 @@
                 !vt_force_oops_output(vc);
 }
 
-static int get_color(struct vc_data *vc, struct fb_info *info,
+int get_color(struct vc_data *vc, struct fb_info *info,
               u16 c, int is_fg)
 {
         int depth = fb_get_color_depth(&info->var, &info->fix);
@@ -551 +552 @@
                 info_idx = -1;
         } else {
                 fbcon_has_console_bind = 1;
+#ifdef CONFIG_FB_CON_DECOR
+                fbcon_decor_init();
+#endif
         }
 
         return err;
@@ -1013 +1017 @@
         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
         cols /= vc->vc_font.width;
         rows /= vc->vc_font.height;
+
+        if (fbcon_decor_active(info, vc)) {
+                cols = vc->vc_decor.twidth / vc->vc_font.width;
+                rows = vc->vc_decor.theight / vc->vc_font.height;
+        }
+
         vc_resize(vc, cols, rows);
 
         DPRINTK("mode:   %s\n", info->fix.id);
@@ -1042 +1052 @@
         cap = info->flags;
 
         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
-            (info->fix.type == FB_TYPE_TEXT))
+            (info->fix.type == FB_TYPE_TEXT) || fbcon_decor_active(info, vc))
                 logo = 0;
 
         if (var_to_display(p, &info->var, info))
@@ -1275 +1285 @@
                 fbcon_clear_margins(vc, 0);
         }
 
+        if (fbcon_decor_active(info, vc)) {
+                fbcon_decor_clear(vc, info, sy, sx, height, width);
+                return;
+        }
+
         /* Split blits that cross physical y_wrap boundary */
 
         y_break = p->vrows - p->yscroll;
@@ -1294 +1309 @@
         struct display *p = &fb_display[vc->vc_num];
         struct fbcon_ops *ops = info->fbcon_par;
 
-        if (!fbcon_is_inactive(vc, info))
-                ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
-                           get_color(vc, info, scr_readw(s), 1),
-                           get_color(vc, info, scr_readw(s), 0));
+        if (!fbcon_is_inactive(vc, info)) {
+
+                if (fbcon_decor_active(info, vc))
+                        fbcon_decor_putcs(vc, info, s, count, ypos, xpos);
+                else
+                        ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
+                                   get_color(vc, info, scr_readw(s), 1),
+                                   get_color(vc, info, scr_readw(s), 0));
+        }
 }
 
 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
@@ -1313 +1333 @@
         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
         struct fbcon_ops *ops = info->fbcon_par;
 
-        if (!fbcon_is_inactive(vc, info))
-                ops->clear_margins(vc, info, margin_color, bottom_only);
+        if (!fbcon_is_inactive(vc, info)) {
+                if (fbcon_decor_active(info, vc))
+                        fbcon_decor_clear_margins(vc, info, bottom_only);
+                else
+                        ops->clear_margins(vc, info, margin_color, bottom_only);
+        }
 }
 
 static void fbcon_cursor(struct vc_data *vc, int mode)
@@ -1835 +1859 @@
                         count = vc->vc_rows;
                 if (softback_top)
                         fbcon_softback_note(vc, t, count);
-                if (logo_shown >= 0)
+                if (logo_shown >= 0 || fbcon_decor_active(info, vc))
                         goto redraw_up;
                 switch (p->scrollmode) {
                 case SCROLL_MOVE:
@@ -1928 +1952 @@
                         count = vc->vc_rows;
                 if (logo_shown >= 0)
                         goto redraw_down;
+                if (fbcon_decor_active(info, vc))
+                        goto redraw_down;
                 switch (p->scrollmode) {
                 case SCROLL_MOVE:
                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
@@ -2076 +2102 @@
                 }
                 return;
         }
+
+        if (fbcon_decor_active(info, vc) && sy == dy && height == 1) {
+                /* must use slower redraw bmove to keep background pic intact */
+                fbcon_decor_bmove_redraw(vc, info, sy, sx, dx, width);
+                return;
+        }
+
         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
                    height, width);
 }
@@ -2146 +2179 @@
         var.yres = virt_h * virt_fh;
         x_diff = info->var.xres - var.xres;
         y_diff = info->var.yres - var.yres;
-        if (x_diff < 0 || x_diff > virt_fw ||
-            y_diff < 0 || y_diff > virt_fh) {
+        if ((x_diff < 0 || x_diff > virt_fw ||
+                y_diff < 0 || y_diff > virt_fh) && !vc->vc_decor.state) {
                 const struct fb_videomode *mode;
 
                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
@@ -2183 +2216 @@
 
         info = registered_fb[con2fb_map[vc->vc_num]];
         ops = info->fbcon_par;
+        prev_console = ops->currcon;
+        if (prev_console != -1)
+                old_info = registered_fb[con2fb_map[prev_console]];
+
+#ifdef CONFIG_FB_CON_DECOR
+        if (!fbcon_decor_active_vc(vc) && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+                struct vc_data *vc_curr = vc_cons[prev_console].d;
+
+                if (vc_curr && fbcon_decor_active_vc(vc_curr)) {
+                        // Clear the screen to avoid displaying funky colors
+                        // during palette updates.
+                        memset((u8 *)info->screen_base + info->fix.line_length * info->var.yoffset,
+                               0, info->var.yres * info->fix.line_length);
+                }
+        }
+#endif
 
         if (softback_top) {
                 if (softback_lines)
@@ -2201 +2250 @@
                 logo_shown = FBCON_LOGO_CANSHOW;
         }
 
-        prev_console = ops->currcon;
-        if (prev_console != -1)
-                old_info = registered_fb[con2fb_map[prev_console]];
         /*
          * FIXME: If we have multiple fbdev's loaded, we need to
          * update all info->currcon.  Perhaps, we can place this
@@ -2247 +2293 @@
                         fbcon_del_cursor_timer(old_info);
         }
 
+        if (fbcon_decor_active_vc(vc)) {
+                struct vc_data *vc_curr = vc_cons[prev_console].d;
+
+                if (!vc_curr->vc_decor.theme ||
+                        strcmp(vc->vc_decor.theme, vc_curr->vc_decor.theme) ||
+                        (fbcon_decor_active_nores(info, vc_curr) &&
+                         !fbcon_decor_active(info, vc_curr))) {
+                        fbcon_decor_disable(vc, 0);
+                        fbcon_decor_call_helper("modechange", vc->vc_num);
+                }
+        }
+
         if (fbcon_is_inactive(vc, info) ||
             ops->blank_state != FB_BLANK_UNBLANK)
                 fbcon_del_cursor_timer(info);
@@ -2355 +2413 @@
                 }
         }
 
-        if (!fbcon_is_inactive(vc, info)) {
+        if (!fbcon_is_inactive(vc, info)) {
                 if (ops->blank_state != blank) {
                         ops->blank_state = blank;
                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
                         ops->cursor_flash = (!blank);
 
-                        if (!(info->flags & FBINFO_MISC_USEREVENT))
-                                if (fb_blank(info, blank))
-                                        fbcon_generic_blank(vc, info, blank);
+                        if (!(info->flags & FBINFO_MISC_USEREVENT)) {
+                                if (fb_blank(info, blank)) {
+                                        if (fbcon_decor_active(info, vc))
+                                                fbcon_decor_blank(vc, info, blank);
+                                        else
+                                                fbcon_generic_blank(vc, info, blank);
+                                }
+                        }
                 }
 
                 if (!blank)
@@ -2546 +2609 @@
                 set_vc_hi_font(vc, true);
 
         if (resize) {
+                /* reset wrap/pan */
                 int cols, rows;
 
                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+
+                if (fbcon_decor_active(info, vc)) {
+                        info->var.xoffset = info->var.yoffset = p->yscroll = 0;
+                        cols = vc->vc_decor.twidth;
+                        rows = vc->vc_decor.theight;
+                }
                 cols /= w;
                 rows /= h;
+
                 vc_resize(vc, cols, rows);
+
                 if (con_is_visible(vc) && softback_buf)
                         fbcon_update_softback(vc);
         } else if (con_is_visible(vc)
@@ -2681 +2753 @@
         int i, j, k, depth;
         u8 val;
 
-        if (fbcon_is_inactive(vc, info))
+        if (fbcon_is_inactive(vc, info)
+#ifdef CONFIG_FB_CON_DECOR
+                        || vc->vc_num != fg_console
+#endif
+                )
                 return;
 
         if (!con_is_visible(vc))
@@ -2707 +2783 @@
         } else
                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
 
-        fb_set_cmap(&palette_cmap, info);
+        if (fbcon_decor_active(info, vc_cons[fg_console].d) &&
+            info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+
+                u16 *red, *green, *blue;
+                int minlen = min(min(info->var.red.length, info->var.green.length),
+                                     info->var.blue.length);
+
+                struct fb_cmap cmap = {
+                        .start = 0,
+                        .len = (1 << minlen),
+                        .red = NULL,
+                        .green = NULL,
+                        .blue = NULL,
+                        .transp = NULL
+                };
+
+                red = kmalloc(256 * sizeof(u16) * 3, GFP_KERNEL);
+
+                if (!red)
+                        goto out;
+
+                green = red + 256;
+                blue = green + 256;
+                cmap.red = red;
+                cmap.green = green;
+                cmap.blue = blue;
+
+                for (i = 0; i < cmap.len; i++)
+                        red[i] = green[i] = blue[i] = (0xffff * i)/(cmap.len-1);
+
+                fb_set_cmap(&cmap, info);
+                fbcon_decor_fix_pseudo_pal(info, vc_cons[fg_console].d);
+                kfree(red);
+
+                return;
+
+        } else if (fbcon_decor_active(info, vc_cons[fg_console].d) &&
+                   info->var.bits_per_pixel == 8 && info->bgdecor.cmap.red != NULL)
+                fb_set_cmap(&info->bgdecor.cmap, info);
+
+out:    fb_set_cmap(&palette_cmap, info);
 }
 
 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
@@ -2932 +3048 @@
                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
                 cols /= vc->vc_font.width;
                 rows /= vc->vc_font.height;
-                vc_resize(vc, cols, rows);
+
+                if (!fbcon_decor_active_nores(info, vc)) {
+                        vc_resize(vc, cols, rows);
+                } else {
+                        fbcon_decor_disable(vc, 0);
+                        fbcon_decor_call_helper("modechange", vc->vc_num);
+                }
+
                 updatescrollmode(p, info, vc);
                 scrollback_max = 0;
                 scrollback_current = 0;
@@ -2977 +3100 @@
                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
                 cols /= vc->vc_font.width;
                 rows /= vc->vc_font.height;
-                vc_resize(vc, cols, rows);
+                if (!fbcon_decor_active_nores(info, vc))
+                        vc_resize(vc, cols, rows);
         }
 
         if (fg != -1)
@@ -3618 +3742 @@
                 }
         }
 
+        fbcon_decor_exit();
         fbcon_has_exited = 1;
 }
 

drivers/video/fbdev/core/fbmem.c

@@ -1253 +1253 @@
         u16                     reserved[3];
 };
 
-struct fb_cmap32 {
-        u32                     start;
-        u32                     len;
-        compat_caddr_t  red;
-        compat_caddr_t  green;
-        compat_caddr_t  blue;
-        compat_caddr_t  transp;
-};
-
 static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
                           unsigned long arg)
 {

new file include/linux/console_decor.h

@@ +1 @@
+#ifndef _LINUX_CONSOLE_DECOR_H_
+#define _LINUX_CONSOLE_DECOR_H_ 1
+
+/* A structure used by the framebuffer console decorations (drivers/video/console/fbcondecor.c) */
+struct vc_decor {
+        __u8 bg_color;                          /* The color that is to be treated as transparent */
+        __u8 state;                             /* Current decor state: 0 = off, 1 = on */
+        __u16 tx, ty;                           /* Top left corner coordinates of the text field */
+        __u16 twidth, theight;                  /* Width and height of the text field */
+        char *theme;
+};
+
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+
+struct vc_decor32 {
+        __u8 bg_color;                          /* The color that is to be treated as transparent */
+        __u8 state;                             /* Current decor state: 0 = off, 1 = on */
+        __u16 tx, ty;                           /* Top left corner coordinates of the text field */
+        __u16 twidth, theight;                  /* Width and height of the text field */
+        compat_uptr_t theme;
+};
+
+#define vc_decor_from_compat(to, from) \
+        (to).bg_color = (from).bg_color; \
+        (to).state    = (from).state; \
+        (to).tx       = (from).tx; \
+        (to).ty       = (from).ty; \
+        (to).twidth   = (from).twidth; \
+        (to).theight  = (from).theight; \
+        (to).theme    = compat_ptr((from).theme)
+
+#define vc_decor_to_compat(to, from) \
+        (to).bg_color = (from).bg_color; \
+        (to).state    = (from).state; \
+        (to).tx       = (from).tx; \
+        (to).ty       = (from).ty; \
+        (to).twidth   = (from).twidth; \
+        (to).theight  = (from).theight; \
+        (to).theme    = ptr_to_compat((from).theme)
+
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+
+#endif

include/linux/console_struct.h

@@ -21 +21 @@
 struct uni_pagedir;
 
 #define NPAR 16
+#include <linux/console_decor.h>
 
 /*
  * Example: vc_data of a console that was scrolled 3 lines down.
@@ -141 +142 @@
         struct uni_pagedir *vc_uni_pagedir;
         struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */
         bool vc_panic_force_write; /* when oops/panic this VC can accept forced output/blanking */
+
+        struct vc_decor vc_decor;
         /* additional information is in vt_kern.h */
 };
 

include/linux/fb.h

@@ -239 +239 @@
 };
 #endif
 
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+struct fb_image32 {
+        __u32 dx;                       /* Where to place image */
+        __u32 dy;
+        __u32 width;                    /* Size of image */
+        __u32 height;
+        __u32 fg_color;                 /* Only used when a mono bitmap */
+        __u32 bg_color;
+        __u8  depth;                    /* Depth of the image */
+        const compat_uptr_t data;       /* Pointer to image data */
+        struct fb_cmap32 cmap;          /* color map info */
+};
+
+#define fb_image_from_compat(to, from) \
+        (to).dx       = (from).dx; \
+        (to).dy       = (from).dy; \
+        (to).width    = (from).width; \
+        (to).height   = (from).height; \
+        (to).fg_color = (from).fg_color; \
+        (to).bg_color = (from).bg_color; \
+        (to).depth    = (from).depth; \
+        (to).data     = compat_ptr((from).data); \
+        fb_cmap_from_compat((to).cmap, (from).cmap)
+
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+
 /*
  * Frame buffer operations
  *
@@ -509 +537 @@
 #define FBINFO_STATE_SUSPENDED  1
         u32 state;                      /* Hardware state i.e suspend */
         void *fbcon_par;                /* fbcon use-only private area */
+
+        struct fb_image bgdecor;
+
         /* From here on everything is device dependent */
         void *par;
         /* we need the PCI or similar aperture base/size not

include/uapi/linux/fb.h

@@ -9 +9 @@
 
 #define FB_MAX                  32      /* sufficient for now */
 
+struct fbcon_decor_iowrapper {
+        unsigned short vc;              /* Virtual console */
+        unsigned char origin;           /* Point of origin of the request */
+        void *data;
+};
+
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+struct fbcon_decor_iowrapper32 {
+        unsigned short vc;              /* Virtual console */
+        unsigned char origin;           /* Point of origin of the request */
+        compat_uptr_t data;
+};
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+
 /* ioctls
    0x46 is 'F'                                                          */
 #define FBIOGET_VSCREENINFO     0x4600
@@ -36 +53 @@
 #define FBIOGET_DISPINFO        0x4618
 #define FBIO_WAITFORVSYNC       _IOW('F', 0x20, __u32)
 
+#define FBIOCONDECOR_SETCFG     _IOWR('F', 0x19, struct fbcon_decor_iowrapper)
+#define FBIOCONDECOR_GETCFG     _IOR('F', 0x1A, struct fbcon_decor_iowrapper)
+#define FBIOCONDECOR_SETSTATE   _IOWR('F', 0x1B, struct fbcon_decor_iowrapper)
+#define FBIOCONDECOR_GETSTATE   _IOR('F', 0x1C, struct fbcon_decor_iowrapper)
+#define FBIOCONDECOR_SETPIC     _IOWR('F', 0x1D, struct fbcon_decor_iowrapper)
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+#define FBIOCONDECOR_SETCFG32   _IOWR('F', 0x19, struct fbcon_decor_iowrapper32)
+#define FBIOCONDECOR_GETCFG32   _IOR('F', 0x1A, struct fbcon_decor_iowrapper32)
+#define FBIOCONDECOR_SETSTATE32 _IOWR('F', 0x1B, struct fbcon_decor_iowrapper32)
+#define FBIOCONDECOR_GETSTATE32 _IOR('F', 0x1C, struct fbcon_decor_iowrapper32)
+#define FBIOCONDECOR_SETPIC32   _IOWR('F', 0x1D, struct fbcon_decor_iowrapper32)
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+
+#define FBCON_DECOR_THEME_LEN           128     /* Maximum length of a theme name */
+#define FBCON_DECOR_IO_ORIG_KERNEL      0       /* Kernel ioctl origin */
+#define FBCON_DECOR_IO_ORIG_USER        1       /* User ioctl origin */
+
 #define FB_TYPE_PACKED_PIXELS           0       /* Packed Pixels        */
 #define FB_TYPE_PLANES                  1       /* Non interleaved planes */
 #define FB_TYPE_INTERLEAVED_PLANES      2       /* Interleaved planes   */
@@ -278 +314 @@
         __u32 reserved[4];              /* Reserved for future compatibility */
 };
 
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+struct fb_cmap32 {
+        __u32 start;
+        __u32 len;                      /* Number of entries */
+        compat_uptr_t red;              /* Red values   */
+        compat_uptr_t green;
+        compat_uptr_t blue;
+        compat_uptr_t transp;           /* transparency, can be NULL */
+};
+
+#define fb_cmap_from_compat(to, from) \
+        (to).start  = (from).start; \
+        (to).len    = (from).len; \
+        (to).red    = compat_ptr((from).red); \
+        (to).green  = compat_ptr((from).green); \
+        (to).blue   = compat_ptr((from).blue); \
+        (to).transp = compat_ptr((from).transp)
+
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+
+
 struct fb_cmap {
         __u32 start;                    /* First entry  */
         __u32 len;                      /* Number of entries */

kernel/sysctl.c

@@ -150 +150 @@
 static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
 #endif
 
+#ifdef CONFIG_FB_CON_DECOR
+extern char fbcon_decor_path[];
+#endif
+
 #ifdef CONFIG_INOTIFY_USER
 #include <linux/inotify.h>
 #endif
@@ -283 +287 @@
                 .mode           = 0555,
                 .child          = dev_table,
         },
+#ifdef CONFIG_FB_CON_DECOR
+        {
+                .procname       = "fbcondecor",
+                .data           = &fbcon_decor_path,
+                .maxlen         = KMOD_PATH_LEN,
+                .mode           = 0644,
+                .proc_handler   = &proc_dostring,
+        },
+#endif
         { }
 };