Subversion Repositories HelenOS

Rev

Rev 2071 | 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. /** @addtogroup console
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <screenbuffer.h>
  36. #include <malloc.h>
  37. #include <unistd.h>
  38.  
  39. /** Store one character to screenbuffer. Its position is determined by
  40.  * scr->position_x and scr->position_y.
  41.  *
  42.  * @param scr   screenbuffer
  43.  * @param c stored character
  44.  */
  45. void screenbuffer_putchar(screenbuffer_t *scr, char c)
  46. {
  47.     keyfield_t *field;
  48.    
  49.     field = get_field_at(scr, scr->position_x, scr->position_y);
  50.  
  51.     field->character = c;
  52.     field->style = scr->style;
  53. }
  54.  
  55. /** Initilize screenbuffer. Allocate space for screen content in accordance to given size.
  56.  * @param scr       initialized screenbuffer
  57.  * @param size_x    width in characters    
  58.  * @param size_y    height in characters
  59.  * @return pointer to screenbuffer (same as scr parameter) or NULL
  60.  */
  61. screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y)
  62. {
  63.     scr->buffer = (keyfield_t *) malloc(sizeof(keyfield_t) * size_x * size_y);
  64.     if (!scr->buffer) {
  65.         return NULL;
  66.     }
  67.    
  68.     scr->size_x = size_x;
  69.     scr->size_y = size_y;
  70.     scr->style.fg_color = DEFAULT_FOREGROUND;
  71.     scr->style.bg_color = DEFAULT_BACKGROUND;
  72.     scr->is_cursor_visible = 1;
  73.    
  74.     screenbuffer_clear(scr);
  75.    
  76.     return scr;
  77. }
  78.  
  79. /** Clear screenbuffer.
  80.  * @param scr screenbuffer
  81.  */
  82. void screenbuffer_clear(screenbuffer_t *scr)
  83. {
  84.     unsigned int i;
  85.    
  86.     for (i = 0; i < (scr->size_x * scr->size_y); i++) {
  87.         scr->buffer[i].character = ' ';
  88.         scr->buffer[i].style = scr->style;
  89.     }
  90.  
  91.     scr->top_line = 0;
  92.     scr->position_y = 0;
  93.     scr->position_x = 0;
  94. }
  95.  
  96. /** Clear one buffer line.
  97.  * @param scr
  98.  * @param line One buffer line (not a screen line!)
  99.  */
  100. void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line)
  101. {
  102.     unsigned int i;
  103.    
  104.     for (i = 0; i < scr->size_x; i++) {
  105.         scr->buffer[i + line * scr->size_x].character = ' ';
  106.         scr->buffer[i + line * scr->size_x].style = scr->style;
  107.     }
  108. }
  109.  
  110. /** Copy content buffer from screenbuffer to given memory.
  111.  * @param scr   source screenbuffer
  112.  * @param dest  destination
  113.  */
  114. void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest)
  115. {
  116.     unsigned int i;
  117.    
  118.     for (i = 0; i < scr->size_x * scr->size_y; i++) {
  119.         dest[i] = scr->buffer[i];
  120.     }
  121. }
  122.  
  123. /** Set new cursor position in screenbuffer.
  124.  * @param scr
  125.  * @param x
  126.  * @param y
  127.  */
  128. void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y)
  129. {
  130.     scr->position_x = x % scr->size_x;
  131.     scr->position_y = y % scr->size_y;
  132. }
  133.  
  134. /** Set new style.
  135.  * @param scr
  136.  * @param fg_color
  137.  * @param bg_color
  138.  */
  139. void screenbuffer_set_style(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color)
  140. {
  141.     scr->style.fg_color = fg_color;
  142.     scr->style.bg_color = bg_color;
  143. }
  144.  
  145.  
  146. /** @}
  147.  */
  148.