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; |
} |
|