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