Index: uspace/lib/c/generic/io/screenbuffer.c
===================================================================
--- uspace/lib/c/generic/io/screenbuffer.c	(revision 369a5f8a1a86047b7259dfe2c89e8b6f05751cbb)
+++ uspace/lib/c/generic/io/screenbuffer.c	(revision 369a5f8a1a86047b7259dfe2c89e8b6f05751cbb)
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2006 Josef Cejka
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup console
+ * @{
+ */
+/** @file
+ */
+
+#include <io/style.h>
+#include <io/screenbuffer.h>
+#include <malloc.h>
+#include <unistd.h>
+
+/** Store one character to screenbuffer.
+ *
+ * Its position is determined by scr->position_x
+ * and scr->position_y.
+ *
+ * @param scr Screenbuffer
+ * @param c   Stored character
+ *
+ */
+void screenbuffer_putchar(screenbuffer_t *scr, wchar_t ch)
+{
+	keyfield_t *field =
+	    get_field_at(scr, scr->position_x, scr->position_y);
+	
+	field->character = ch;
+	field->attrs = scr->attrs;
+}
+
+/** Initilize screenbuffer.
+ *
+ * Allocate space for screen content in accordance to given size.
+ *
+ * @param scr    Initialized screenbuffer
+ * @param size_x Width in characters
+ * @param size_y Height in characters
+ *
+ * @return Pointer to screenbuffer (same as scr parameter) or NULL
+ *
+ */
+screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, ipcarg_t size_x,
+    ipcarg_t size_y)
+{
+	scr->buffer = (keyfield_t *) malloc(sizeof(keyfield_t) * size_x * size_y);
+	if (!scr->buffer)
+		return NULL;
+	
+	scr->size_x = size_x;
+	scr->size_y = size_y;
+	scr->attrs.t = at_style;
+	scr->attrs.a.s.style = STYLE_NORMAL;
+	scr->is_cursor_visible = 1;
+	
+	screenbuffer_clear(scr);
+	
+	return scr;
+}
+
+/** Clear screenbuffer.
+ *
+ * @param scr Screenbuffer
+ *
+ */
+void screenbuffer_clear(screenbuffer_t *scr)
+{
+	size_t i;
+	
+	for (i = 0; i < (scr->size_x * scr->size_y); i++) {
+		scr->buffer[i].character = ' ';
+		scr->buffer[i].attrs = scr->attrs;
+	}
+	
+	scr->top_line = 0;
+	scr->position_x = 0;
+	scr->position_y = 0;
+}
+
+/** Clear one buffer line.
+ *
+ * @param scr
+ * @param line One buffer line (not a screen line!)
+ *
+ */
+void screenbuffer_clear_line(screenbuffer_t *scr, ipcarg_t line)
+{
+	ipcarg_t x;
+	
+	for (x = 0; x < scr->size_x; x++) {
+		scr->buffer[x + line * scr->size_x].character = ' ';
+		scr->buffer[x + line * scr->size_x].attrs = scr->attrs;
+	}
+}
+
+/** Copy content buffer from screenbuffer to given memory.
+ *
+ * @param scr  Source screenbuffer
+ * @param dest Destination
+ *
+ */
+void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest)
+{
+	size_t i;
+	
+	for (i = 0; i < (scr->size_x * scr->size_y); i++)
+		dest[i] = scr->buffer[i];
+}
+
+/** Set new cursor position in screenbuffer.
+ *
+ * @param scr
+ * @param x
+ * @param y
+ *
+ */
+void screenbuffer_goto(screenbuffer_t *scr, ipcarg_t x, ipcarg_t y)
+{
+	scr->position_x = x % scr->size_x;
+	scr->position_y = y % scr->size_y;
+}
+
+/** Set new style.
+ *
+ * @param scr
+ * @param fg_color
+ * @param bg_color
+ *
+ */
+void screenbuffer_set_style(screenbuffer_t *scr, uint8_t style)
+{
+	scr->attrs.t = at_style;
+	scr->attrs.a.s.style = style;
+}
+
+/** Set new color.
+ *
+ * @param scr
+ * @param fg_color
+ * @param bg_color
+ *
+ */
+void screenbuffer_set_color(screenbuffer_t *scr, uint8_t fg_color,
+    uint8_t bg_color, uint8_t flags)
+{
+	scr->attrs.t = at_idx;
+	scr->attrs.a.i.fg_color = fg_color;
+	scr->attrs.a.i.bg_color = bg_color;
+	scr->attrs.a.i.flags = flags;
+}
+
+/** Set new RGB color.
+ *
+ * @param scr
+ * @param fg_color
+ * @param bg_color
+ *
+ */
+void screenbuffer_set_rgb_color(screenbuffer_t *scr, uint32_t fg_color,
+    uint32_t bg_color)
+{
+	scr->attrs.t = at_rgb;
+	scr->attrs.a.r.fg_color = fg_color;
+	scr->attrs.a.r.bg_color = bg_color;
+}
+
+/** @}
+ */
