#!/bin/bash # # compose_table [options] [output_file] # # Generate images showing the results of compose methods with various # test images. If no output filename "show:" the result in background. # # Options: # -a so all composition testing tables (both duff and math methods) # -b include gradient testing of duff-poster blending # -m output mathematical and shading compose methods # -mb include alpha blending tests of mathematical methods # # -t compose using my personal test build environment # -s Apply without the 'sync' flag to turn off over blending # #### # # Anthony Thyssen !3 July 2009 # PROGNAME=`type $0 | awk '{print $3}'` # search for executable on path PROGDIR=`dirname $PROGNAME` # extract directory of program PROGNAME=`basename $PROGNAME` # base name of program Usage() { # output the script comments as docs echo >&2 "$PROGNAME:" "$@" sed >&2 -n '/^###/q; /^#/!q; s/^#//; s/^ //; 3s/^/Usage: /; 2,$ p' \ "$PROGDIR/$PROGNAME" exit 10; } # # Generalized Otion handling. # while [ $# -gt 0 ]; do case "$1" in --help|--doc*) Usage ;; -b) DUFF_BLEND=true ;; # testing duff-porter gradient blending -m) MATH=true ;; # ouput math operator blending -mb) MATH_BLEND=true ;; # testing math operator blending -a) MATH_BLEND=true DUFF_BLEND=true ;; # all modes -t) IM=im ;; # test using the just test build version of IM -s) SYNC='-channel RGBA' ;; # turn off SVG over blending for math composes --) shift; break ;; # end of user options -*) Usage "Unknown option \"$1\"" ;; *) break ;; # end of user options esac shift # next option done [ "$MATH_BLEND" ] && MATH=true [ "$DUFF_BLEND" ] && DUFF=true [ "$MATH" -a "$DUFF_BLEND" ] && MATH_BLEND=true # if no mode specified show just the standard 'duff-porter' table. [ -z "$MATH" ] && DUFF=true ops_duff='Src Dst Clear Xor Over In Out Atop Dst_Over Dst_In Dst_Out Dst_Atop ' ops_math='Plus Minus ModulusAdd ModulusSubtract Screen Multiply Difference Exclusion Lighten Darken -none- Divide LinearDodge LinearBurn ColorBurn ColorDodge Overlay SoftLight PegtopLight -none- HardLight PinLight LinearLight VividLight ' # Bumpmap page_bg_color=LightSteelBlue # Make temporary directory for intermediate images umask 77 tmpdir=`mktemp -d "${TMPDIR:-/tmp}/$PROGNAME-XXXXXXXXXX"` || { echo >&2 "$PROGNAME: Unable to create temporary directory"; exit 10;} trap 'cd; rm -rf "$tmpdir"' 0 # remove when finished (on end or exit) trap 'exit 2' 1 2 3 15 pwd=`pwd` # save current directory (for results) cd $tmpdir # Change to the temporary working directory # Get the error image #magick http://www.im.awm.jp/Usage/images/image_error.gif \ # compose_error.png magick $HOME/im/images/image_error.gif compose_error.png # Special Images magick -label ' ' -size 1x1 xc:$page_bg_color compose_none.png magick -background $page_bg_color -size 0x24 -gravity center \ -label ' ' label:OP compose_method.png # --------------------------------------------------------- # # Do the magick montage given the images P, Q, and M (source, destination, mask) # do_montage() { [ -f $P -a -f $Q ] || { echo >&2 "$0: Images $P $Q failed to build" exit 10 } rm -f compose_op_*.png # precaution magick -label 'Overlay (Src)' $P \ -bordercolor blue -compose Copy -border 1 \ compose_op_P.png magick -label 'Backgnd (Dst)' $Q \ -bordercolor blue -compose Copy -border 1 \ compose_op_Q.png list="" list="$list compose_op_P.png" list="$list compose_method.png" list="$list compose_op_Q.png" list="$list compose_none.png" for op in $methods do if [ X$op = X-none- ]; then list="$list compose_none.png" else $IM magick -label $op $Q $P \ -gravity center $SYNC \ -compose $op -composite -compose Over \ -bordercolor $page_bg_color -border 0 \ -bordercolor blue -border 1 \ compose_op_$op.png if [ ! -f compose_op_$op.png ]; then magick -label $op compose_error.png \ compose_op_$op.png fi list="$list compose_op_$op.png" fi done eval "magick montage -background $page_bg_color $list \ -tile 4x -geometry +4+4 \"$1\"" # roll the top row to recenter it. if [ -z "$M" ]; then magick mogrify -region 0x90+0+0 -roll +35+0 "$1" fi rm -f compose_op_*.png } # ---------------------------------------------------------------------------- # # Duff Porter compose methods # if [ "$DUFF" ]; then methods="$ops_duff" # Test blending operators using triangles P=compose_P.png Q=compose_Q.png magick -size 50x50 xc:none -fill gold -draw 'polyline 0,0 0,49 49,0' $P magick -size 64x64 xc:none -fill blue -draw 'polyline 0,0 63,63 63,0' $Q do_magick montage montage_triangle.png rm -f $P $Q montages="${montages:+$montages,}triangle" # Test blending operators using gradients if [ "$DUFF_BLEND" ]; then P=gradient_none_v.png Q=gradient_none_h.png magick -size 64x5 xc:black xc:none -size 64x54 gradient:black-none +swap \ -append -fill gold -colorize 100 -write $P \ -transverse -fill blue -colorize 100 $Q do_magick montage montage_gradient.png rm -f $P $Q montages="${montages:+$montages,}gradient" P=blend_black_v.png Q=blend_black_h.png magick -size 64x5 xc:black xc:none -size 64x54 gradient:black-none +swap \ -append -write $P -transverse $Q do_magick montage montage_blending.png rm -f $P $Q montages="${montages:+$montages,}blending" fi # if DUFF_BLEND fi # if DUFF # ------------------------------------ # # Math Composite Methods # if [ "$MATH" ]; then methods="$ops_math" # gradient test P=gradient_grey_v.png Q=gradient_grey_h.png magick -size 64x64 gradient: -write $P -transverse $Q do_magick montage montage_math.png montages="${montages:+$montages,}math" if [ "$MATH_BLEND" ]; then # # testing of the 'blend mode' of mathematical operators # P=gradient_rect_v.png Q=gradient_rect_h.png magick -size 64x64 xc:none -draw 'rectangle 20,0 43,63' \ gradient: -compose In -composite -write $P -transverse $Q do_magick montage montage_grad_rect.png montages="${montages:+$montages,}grad_rect" # Alternative.. #magick -size 64x64 gradient: \ # -background black -alpha shape gradient_trans_v.png P=gradient_trans_v.png Q=gradient_trans_h.png magick -size 64x64 gradient:black-none -write $P -transverse $Q do_magick montage montage_grad_trans.png montages="${montages:+$montages,}grad_trans" fi # if MATH_BLEND rm -f gradient_* fi # if MATH # ------------------------------------ # # Finish up into final chart # cd $pwd # do back to the original directory magick null: $tmpdir/montage_null.png tile=x1 [ "$MATH" -a "$DUFF" ] && tile=3x eval "magick $tmpdir/montage_{$montages,null}.png"' +delete \ -frame 3x3+0+2 miff:- | magick montage - -tile $tile -mode Concatenate miff:- | magick - -frame 3x3+2+0 "${1:-show:}"'