| 0,0 → 1,118 |
|---|
| /* |
| * 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. |
| */ |
| |
| #include <screenbuffer.h> |
| #include <malloc.h> |
| #include <unistd.h> |
| |
| /** Get field from buffer that corresponds to character at position x,y at screen |
| * |
| */ |
| |
| int screenbuffer_putchar(screenbuffer_t *scr, char c) |
| { |
| keyfield_t *field; |
| |
| field = get_field_at(scr, scr->position_x, scr->position_y); |
| |
| field->character = c; |
| field->style = scr->style; |
| |
| scr->position_x++; |
| if (scr->position_x == scr->size_x) { |
| scr->position_x = 0; |
| scr->position_y++; |
| if (scr->position_y == scr->size_y) { |
| /* scroll */ |
| scr->position_y--; |
| screenbuffer_clear_line(scr, scr->top_line++); |
| } |
| } |
| |
| return 1; |
| } |
| |
| screenbuffer_t *screenbuffer_init(screenbuffer_t *scr, int size_x, int size_y) |
| { |
| if ((scr->buffer = (keyfield_t *)malloc(sizeof(keyfield_t) * size_x * size_y)) == NULL) { |
| return NULL; |
| } |
| |
| scr->size_x = size_x; |
| scr->size_y = size_y; |
| scr->position_y = 0; |
| scr->position_x = 0; |
| scr->style.fg_color = DEFAULT_FOREGROUND_COLOR; |
| scr->style.bg_color = DEFAULT_BACKGROUND_COLOR; |
| scr->top_line = 0; |
| return scr; |
| } |
| |
| void screenbuffer_clear(screenbuffer_t *scr) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < scr->size_x * scr->size_y; i++) { |
| scr->buffer[i].character = ' '; |
| scr->buffer[i].style = scr->style; |
| } |
| |
| scr->top_line = 0; |
| scr->position_y = 0; |
| scr->position_x = 0; |
| } |
| |
| /** Clear one buffer line |
| * @param scr |
| * @param line One buffer line (not a screen line!) |
| */ |
| void screenbuffer_clear_line(screenbuffer_t *scr, unsigned int line) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < scr->size_x; i++) { |
| scr->buffer[i + line*scr->size_x].character = ' '; |
| scr->buffer[i + line*scr->size_x].style = scr->style; |
| } |
| } |
| |
| void screenbuffer_copy_buffer(screenbuffer_t *scr, keyfield_t *dest) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < scr->size_x * scr->size_y; i++) { |
| dest[i] = scr->buffer[i]; |
| } |
| } |
| |
| void screenbuffer_goto(screenbuffer_t *scr, unsigned int x, unsigned int y) |
| { |
| scr->position_x = x % scr->size_x; |
| scr->position_y = (y + scr->top_line) % scr->size_y; |
| } |
| |