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mirror of https://github.com/processone/ejabberd.git synced 2024-12-22 17:28:25 +01:00
xmpp.chapril.org-ejabberd/tools/captcha.sh
2009-09-25 07:02:23 +00:00

53 lines
1.8 KiB
Bash
Executable File

#!/bin/sh
INPUT=$1
WAVE1_AMPLITUDE=$((2 + $RANDOM % 5))
WAVE1_LENGTH=$((50 + $RANDOM % 25))
WAVE2_AMPLITUDE=$((2 + $RANDOM % 5))
WAVE2_LENGTH=$((50 + $RANDOM % 25))
WAVE3_AMPLITUDE=$((2 + $RANDOM % 5))
WAVE3_LENGTH=$((50 + $RANDOM % 25))
W1_LINE_START_Y=$((10 + $RANDOM % 40))
W1_LINE_STOP_Y=$((10 + $RANDOM % 40))
W2_LINE_START_Y=$((10 + $RANDOM % 40))
W2_LINE_STOP_Y=$((10 + $RANDOM % 40))
W3_LINE_START_Y=$((10 + $RANDOM % 40))
W3_LINE_STOP_Y=$((10 + $RANDOM % 40))
B1_LINE_START_Y=$(($RANDOM % 40))
B1_LINE_STOP_Y=$(($RANDOM % 40))
B2_LINE_START_Y=$(($RANDOM % 40))
B2_LINE_STOP_Y=$(($RANDOM % 40))
#B3_LINE_START_Y=$(($RANDOM % 40))
#B3_LINE_STOP_Y=$(($RANDOM % 40))
B1_LINE_START_X=$(($RANDOM % 20))
B1_LINE_STOP_X=$((100 + $RANDOM % 40))
B2_LINE_START_X=$(($RANDOM % 20))
B2_LINE_STOP_X=$((100 + $RANDOM % 40))
#B3_LINE_START_X=$(($RANDOM % 20))
#B3_LINE_STOP_X=$((100 + $RANDOM % 40))
ROLL_X=$(($RANDOM % 40))
convert -size 180x60 xc:none -pointsize 40 \
\( -clone 0 -fill white \
-stroke black -strokewidth 4 -annotate +0+40 "$INPUT" \
-stroke white -strokewidth 2 -annotate +0+40 "$INPUT" \
-roll +$ROLL_X+0 \
-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
-roll -$ROLL_X+0 \) \
\( -clone 0 -stroke black \
-strokewidth 1 -draw \
"line $B1_LINE_START_X,$B1_LINE_START_Y $B1_LINE_STOP_X,$B1_LINE_STOP_Y" \
-strokewidth 1 -draw \
"line $B2_LINE_START_X,$B2_LINE_START_Y $B2_LINE_STOP_X,$B2_LINE_STOP_Y" \
-wave "$WAVE2_AMPLITUDE"x"$WAVE2_LENGTH" \) \
\( -clone 0 -stroke white \
-strokewidth 2 -draw "line 0,$W1_LINE_START_Y 140,$W1_LINE_STOP_Y" \
-strokewidth 2 -draw "line 0,$W2_LINE_START_Y 140,$W2_LINE_STOP_Y" \
-strokewidth 2 -draw "line 0,$W3_LINE_START_Y 140,$W3_LINE_STOP_Y" \
-wave "$WAVE3_AMPLITUDE"x"$WAVE3_LENGTH" \) \
-flatten -crop 140x60 +repage -quality 90 -depth 8 png:-