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  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 <console/style.h>
  37. #include <malloc.h>
  38. #include <unistd.h>
  39.  
  40. /** Store one character to screenbuffer. Its position is determined by
  41.  * scr->position_x and scr->position_y.
  42.  *
  43.  * @param scr   screenbuffer
  44.  * @param c stored character
  45.  */
  46. void screenbuffer_putchar(screenbuffer_t *scr, char c)
  47. {
  48.     keyfield_t *field;
  49.    
  50.     field = get_field_at(scr, scr->position_x, scr->position_y);
  51.  
  52.     field->character = c;
  53.     field->attrs = scr->attrs;
  54. }
  55.  
  56. /** Initilize screenbuffer. Allocate space for screen content in accordance to given size.
  57.  * @param scr       initialized screenbuffer
  58.  * @param size_x    width in characters    
  59.  * @param size_y    height in characters
  60.  * @return pointer to screenbuffer (same as scr parameter) or NULL
  61.  */
  62. screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y)
  63. {
  64.     scr->buffer = (keyfield_t *) malloc(sizeof(keyfield_t) * size_x * size_y);
  65.     if (!scr->buffer) {
  66.         return NULL;
  67.     }
  68.    
  69.     scr->size_x = size_x;
  70.     scr->size_y = size_y;
  71.     scr->attrs.t = at_style;
  72.     scr->attrs.a.s.style = STYLE_NORMAL;
  73.     scr->is_cursor_visible = 1;
  74.    
  75.     screenbuffer_clear(scr);
  76.    
  77.     return scr;
  78. }
  79.  
  80. /** Clear screenbuffer.
  81.  * @param scr screenbuffer
  82.  */
  83. void screenbuffer_clear(screenbuffer_t *scr)
  84. {
  85.     unsigned int i;
  86.    
  87.     for (i = 0; i < (scr->size_x * scr->size_y); i++) {
  88.         scr->buffer[i].character = ' ';
  89.         scr->buffer[i].attrs = scr->attrs;
  90.     }
  91.  
  92.     scr->top_line = 0;
  93.     scr->position_y = 0;
  94.     scr->position_x = 0;
  95. }
  96.  
  97. /** Clear one buffer line.
  98.  * @param scr
  99.  * @param line One buffer line (not a screen line!)
  100.  */
  101. void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line)
  102. {
  103.     unsigned int i;
  104.    
  105.     for (i = 0; i < scr->size_x; i++) {
  106.         scr->buffer[i + line * scr->size_x].character = ' ';
  107.         scr->buffer[i + line * scr->size_x].attrs = scr->attrs;
  108.     }
  109. }
  110.  
  111. /** Copy content buffer from screenbuffer to given memory.
  112.  * @param scr   source screenbuffer
  113.  * @param dest  destination
  114.  */
  115. void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest)
  116. {
  117.     unsigned int i;
  118.    
  119.     for (i = 0; i < scr->size_x * scr->size_y; i++) {
  120.         dest[i] = scr->buffer[i];
  121.     }
  122. }
  123.  
  124. /** Set new cursor position in screenbuffer.
  125.  * @param scr
  126.  * @param x
  127.  * @param y
  128.  */
  129. void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y)
  130. {
  131.     scr->position_x = x % scr->size_x;
  132.     scr->position_y = y % scr->size_y;
  133. }
  134.  
  135. /** Set new style.
  136.  * @param scr
  137.  * @param fg_color
  138.  * @param bg_color
  139.  */
  140. void screenbuffer_set_style(screenbuffer_t *scr, int style)
  141. {
  142.     scr->attrs.t = at_style;
  143.     scr->attrs.a.s.style = style;
  144. }
  145.  
  146. /** Set new color.
  147.  * @param scr
  148.  * @param fg_color
  149.  * @param bg_color
  150.  */
  151. void screenbuffer_set_color(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color, unsigned int flags)
  152. {
  153.     scr->attrs.t = at_idx;
  154.     scr->attrs.a.i.fg_color = fg_color;
  155.     scr->attrs.a.i.bg_color = bg_color;
  156.     scr->attrs.a.i.flags = flags;
  157. }
  158.  
  159. /** Set new RGB color.
  160.  * @param scr
  161.  * @param fg_color
  162.  * @param bg_color
  163.  */
  164. void screenbuffer_set_rgb_color(screenbuffer_t *scr, unsigned int fg_color, unsigned int bg_color)
  165. {
  166.     scr->attrs.t = at_rgb;
  167.     scr->attrs.a.r.fg_color = fg_color;
  168.     scr->attrs.a.r.bg_color = bg_color;
  169. }
  170.  
  171.  
  172. /** @}
  173.  */
  174.