Add a preliminary script to slice up a panorama print into separate

panels.

pano-split.sh

@@ -0,0 +1,111 @@
+#!/bin/bash
+###########
+
+# Splits a panorama image into overlapping panels of the correct size.
+#
+# Note that this is _very_ preliminary, doing the fading/overlapping in a
+# very naive linear manner.
+
+infile="$1"
+
+# D90
+dpi=300
+cols=1852
+drows=2428
+overlap=600
+## 6x20 3-pane
+inrows=6084
+## 6x14 2-pane
+#inrows=4256
+
+#DS620
+#dpi=300
+#cols=1844
+#drows=2436
+#overlap=600
+## 6x20 3-page
+#inrows=6108
+## 6x14 2-page
+#inrows=4272
+
+#DS820
+#dpi=300
+#overlap=600
+#cols=2448
+## 8x18 2-pane
+#drows=3036
+#inrows=5472
+## 8x26 3-pane
+#drows=3036
+#inrows=7908
+## 8x22 2-pane
+#drows=3636
+#inrows=6672
+## 8x32 3-pane
+#drows=3636
+#inrows=9708
+
+# For 600dpi, double everything!
+if [ ${dpi} == 600 ] ; then
+    overlap=`expr ${overlap} * 2`
+    cols=`expr ${cols} * 2`
+    drows=`expr ${drows} * 2`
+    inrows=`expr ${inrows} * 2`
+fi
+
+# Calculate page count XXX is this sane?
+pages=`expr ${drows} - ${overlap}`
+pages=`expr ${inrows} / ${pages}`
+
+# Create gradients
+fadeinname=fade_in_${cols}.pgm
+fadeoutname=fade_out_${cols}.pgm
+
+gm convert -size ${cols}x${overlap} gradient:white-black ${fadeinname}
+gm convert -size ${cols}x${overlap} gradient:black-white ${fadeoutname}
+
+# Generate panels
+src_offset=0
+panels=''
+for panel in `seq 1 ${pages}` ; do
+    echo "generating $panel / $pages"
+
+    panelname=panel_${panel}.ppm
+    panels="${panels} ${panelname}"
+
+    # Generate panel
+    gm convert ${infile} -crop ${cols}x${drows}+0+${src_offset} ${panelname}
+
+    # Increment offset
+    src_offset=`expr ${src_offset} + ${drows}`;
+    src_offset=`expr ${src_offset} - ${overlap}`;
+
+    # First page fades out only
+    if [ ${panel} == 1 ] ; then
+	gm composite -compose screen -gravity south ${fadeoutname} ${panelname} ${panelname}
+    fi
+
+    # Middle pages fade in and out
+    if [ ${panel} -gt 1 ] ; then
+	  if [ ${panel} -lt ${pages} ] ; then
+	      gm composite -compose screen -gravity south ${fadeoutname} ${panelname} ${panelname}
+	  fi
+    fi
+    if [ ${panel} -gt 1 ] ; then
+	  if [ ${panel} -lt ${pages} ] ; then
+    	      gm composite -compose screen -gravity north ${fadeinname} ${panelname} ${panelname}
+	  fi
+    fi
+
+    # Last page fades in only
+    if [ ${panel} == ${pages} ] ; then
+	gm composite -compose screen -gravity north ${fadeinname} ${panelname} ${panelname}
+    fi
+
+done
+
+# Clean up templates
+rm ${fadeinname} ${fadeoutname}
+
+## Create PDF
+gm convert -density ${dpi}x${dpi} ${panels} out.pdf