Fedora15上实现桌面背景图片渐变

#!/bin/bash
#
# 此脚本根据deepin-wallpaper-xml-generator改编而来。
# 用于生成Fedora15背景图片渐变文件&＃xff0c;也可适用于Ubuntu。
# 该脚本未经严格测试&＃xff0c;一切由它引发的悲剧&＃xff0c;本人概不负责&＃xff0c;请谨慎操作。
# 20110705 by junwuwei&＃64;gmail.com
################################################################################
#名称&＃xff0c;可自定义
WALLPAPER_NAME&＃61;"变形金刚渐变主题";
#图片目录&＃xff0c;可自定义
WALLPAPER_DIR&＃61;"/home/junwuwei/Pictures/backgrounds/变形金刚"
#渐变时间&＃xff0c;渐变过程持续5秒。时间设置太短则看不到渐变效果。可自定义
DURATION_TIME&＃61;"5.0"
#静态图片持续的时间。短一点可以很快看到效果。可自定义
STATIC_DURATION_TIME&＃61;"5.0"
################################################################################
#系统目录&＃xff0c;不建议更改
CONFIG_DIR&＃61;"/usr/share/gnome-background-properties"
#生成图片渐变xml文件&＃xff0c;不建议更改
XML_FILE&＃61;"$WALLPAPER_DIR/$WALLPAPER_NAME-1.xml"
#生成图片渐变xml文件&＃xff0c;不建议更改
XML_FILE_PROPERTIES&＃61;"$CONFIG_DIR/$WALLPAPER_NAME.xml"#### First check if we have write permissions to the share dirctory. ####
touch $CONFIG_DIR/testfile >/dev/null 2>/dev/null
if [[ $? -ne 0 ]]; thenecho "**** 没有权限在 $CONFIG_DIR 目录下创建文件&＃xff01;****"exit 1
elserm $CONFIG_DIR/testfile 2>/dev/null
fi#### Show the script description message. ###
cat <################################################################################
EOF#### Fail if the wallpaper directory does not exist. ####
if [[ ! -d $WALLPAPER_DIR ]]; thenecho "**** 目录 \"$WALLPAPER_DIR\" 不存在&＃xff01;****"exit 1
fi#### Count the number of jpg/jpeg/png images. ####
numfiles&＃61;&＃96;ls -1 $WALLPAPER_DIR/*.jpg WALLPAPER_DIR/*.jpeg WALLPAPER_DIR/*.png 2>/dev/null | wc -l&＃96;#### If there are no image files there then exit. ####
if [[ $numfiles -eq 0 ]]; thenecho "**** 目录 \"$WALLPAPER_DIR\" 下没有任何图片文件&＃xff01; ****"exit 1
fi#### Now we create the XML file containing the images for backgrounds. ####
#### Start by creating the header in the XML file. ####
cat < $XML_FILE_PROPERTIES




$WALLPAPER_NAME
$WALLPAPER_NAME
$XML_FILE
zoom


EOF
#### stretched zoom
cat < $XML_FILE


2011
07
05
12
00
00


EOF#### Add each file to the XML file. ####
#### Doing it this way makes sure files with spaces in their names are ####
#### handled properly. (ls .... | while read fname; do) ####
from_file&＃61;
ls -1 $WALLPAPER_DIR/*.jpg $WALLPAPER_DIR/*.png $WALLPAPER_DIR/*.jpeg 2> /dev/null |
while read image_name; doecho $from_fileif [ -f "$from_file" ]; then echo " Adding: &＃96;basename "$image_name"&＃96;."echo " " >> $XML_FILEecho " $STATIC_DURATION_TIME" >> $XML_FILEecho " $from_file" >> $XML_FILEecho " " >> $XML_FILEecho " " >> $XML_FILEecho " $DURATION_TIME" >> $XML_FILEecho " $from_file" >> $XML_FILEecho " $image_name" >> $XML_FILEecho " " >> $XML_FILEfi from_file&＃61;$image_namedone#### Create the footer for the XML file. ####
echo "" >> $XML_FILE#### Lastly display a message to inform caller to logout and back in. ####
cat <################################################################################You&＃39;re almost done. Log out and back in. Invoke the Desktop BackgroundChange application again, and all your selected wallpapers should beavailable to use for all users.
################################################################################EOF