Subversion Repositories HelenOS-historic

Rev

Rev 1553 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (C) 2006 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <screenbuffer.h>
  30. #include <malloc.h>
  31. #include <unistd.h>
  32.  
  33. /** Store one character to screenbuffer. Its position is determined by scr->position_x and scr->position_y.
  34.  * @param scr   screenbuffer
  35.  * @param c stored character
  36.  */
  37. void screenbuffer_putchar(screenbuffer_t *scr, char c)
  38. {
  39.     keyfield_t *field;
  40.    
  41.     field = get_field_at(scr, scr->position_x, scr->position_y);
  42.  
  43.     field->character = c;
  44.     field->style = scr->style;
  45. }
  46.  
  47. /** Initilize screenbuffer. Allocate space for screen content in accordance to given size.
  48.  * @param scr       initialized screenbuffer
  49.  * @param size_x    width in characters    
  50.  * @param size_y    height in characters
  51.  * @return pointer to screenbuffer (same as scr parameter) or NULL
  52.  */
  53. screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y)
  54. {
  55.     if ((scr->buffer = (keyfield_t *)malloc(sizeof(keyfield_t) * size_x * size_y)) == NULL) {
  56.         return NULL;
  57.     }
  58.    
  59.     scr->size_x = size_x;
  60.     scr->size_y = size_y;
  61.     scr->style.fg_color = DEFAULT_FOREGROUND;
  62.     scr->style.bg_color = DEFAULT_BACKGROUND;
  63.     scr->is_cursor_visible = 1;
  64.    
  65.     screenbuffer_clear(scr);
  66.    
  67.     return scr;
  68. }
  69.  
  70. /** Clear screenbuffer.
  71.  * @param scr screenbuffer
  72.  */
  73. void screenbuffer_clear(screenbuffer_t *scr)
  74. {
  75.     unsigned int i;
  76.    
  77.     for (i = 0; i < (scr->size_x * scr->size_y); i++) {
  78.         scr->buffer[i].character = ' ';
  79.         scr->buffer[i].style = scr->style;
  80.     }
  81.  
  82.     scr->top_line = 0;
  83.     scr->position_y = 0;
  84.     scr->position_x = 0;
  85. }
  86.  
  87. /** Clear one buffer line.
  88.  * @param scr
  89.  * @param line One buffer line (not a screen line!)
  90.  */
  91. void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line)
  92. {
  93.     unsigned int i;
  94.    
  95.     for (i = 0; i < scr->size_x; i++) {
  96.         scr->buffer[i + line*scr->size_x].character = ' ';
  97.         scr->buffer[i + line*scr->size_x].style = scr->style;
  98.     }
  99. }
  100.  
  101. /** Copy content buffer from screenbuffer to given memory.
  102.  * @param scr   source screenbuffer
  103.  * @param dest  destination
  104.  */
  105. void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest)
  106. {
  107.     unsigned int i;
  108.    
  109.     for (i = 0; i < scr->size_x * scr->size_y; i++) {
  110.         dest[i] = scr->buffer[i];
  111.     }
  112. }
  113.  
  114. /** Set new cursor position in screenbuffer.
  115.  * @param scr
  116.  * @param x
  117.  * @param y
  118.  */
  119. void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y)
  120. {
  121.     scr->position_x = x % scr->size_x;
  122.     scr->position_y = y % scr->size_y;
  123. }
  124.  
  125. /** Set new style.
  126.  * @param scr
  127.  * @param fg_color
  128.  * @param bg_color
  129.  */
  130. void screenbuffer_set_style(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color)
  131. {
  132.     scr->style.fg_color = fg_color;
  133.     scr->style.bg_color = bg_color;
  134. }
  135.  
  136.