108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Daniel Stenberg <daniel@haxx.se>
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#include <time.h>
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#include "screenhack.h"
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/*
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* Specific implementations for X11, using the generic LCD API and data.
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*/
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#include "lcd-x11.h"
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extern unsigned char display[LCD_WIDTH][LCD_HEIGHT/8];
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extern void screen_resized(int width, int height);
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extern Display *dpy;
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unsigned char display_copy[LCD_WIDTH][LCD_HEIGHT/8];
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void lcd_update (void)
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{
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int x, y;
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int p=0;
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int bit;
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XPoint points[LCD_WIDTH * LCD_HEIGHT];
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int cp=0;
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XPoint clearpoints[LCD_WIDTH * LCD_HEIGHT];
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#if 0
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screen_resized(LCD_WIDTH, LCD_HEIGHT);
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for(y=0; y<LCD_HEIGHT; y+=8) {
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for(x=0; x<LCD_WIDTH; x++) {
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if(display[x][y/8]) {
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/* one or more bits/pixels are set */
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for(bit=0; bit<8; bit++) {
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if(display[x][y/8]&(1<<bit)) {
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points[p].x = x + MARGIN_X;
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points[p].y = y+bit + MARGIN_Y;
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p++; /* increase the point counter */
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}
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}
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}
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}
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}
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#else
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for(y=0; y<LCD_HEIGHT; y+=8) {
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for(x=0; x<LCD_WIDTH; x++) {
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if(display[x][y/8] || display_copy[x][y/8]) {
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/* one or more bits/pixels are changed */
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unsigned char diff =
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display[x][y/8] ^ display_copy[x][y/8];
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for(bit=0; bit<8; bit++) {
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if(display[x][y/8]&(1<<bit)) {
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/* set a dot */
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points[p].x = x + MARGIN_X;
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points[p].y = y+bit + MARGIN_Y;
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p++; /* increase the point counter */
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}
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else if(diff &(1<<bit)) {
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/* clear a dot */
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clearpoints[cp].x = x + MARGIN_X;
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clearpoints[cp].y = y+bit + MARGIN_Y;
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cp++; /* increase the point counter */
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}
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}
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}
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}
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}
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/* copy a huge block */
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memcpy(display_copy, display, sizeof(display));
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#endif
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drawdots(0, &clearpoints[0], cp);
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drawdots(1, &points[0], p);
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Logf("lcd_update: Draws %d pixels, clears %d pixels", p, cp);
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XSync(dpy,False);
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}
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