adding resample to the toolbox

command-line/tools/README.md

@@ -34,6 +34,18 @@ Usage:
 
 Link: <http://osp.kitchen/tools/pdfutils/>
 
+## OSP-tools: `resample.sh`
+
+Dependencies:
+
+- `gs` (Ghostscript)
+
+This will change the resolution of a PDF.
+
+Usage:
+
+    ./resample input.pdf 150
+
 ## Custom VR tools: `make-images-bw.sh`
 
 Dependencies:

command-line/tools/resample.sh

@@ -0,0 +1,18 @@
+#! /bin/bash
+
+pdffile=$1;
+dpi=$2
+
+gs \
+  -o "${pdffile%.pdf}-resampled.pdf" \
+  -sDEVICE=pdfwrite \
+  -dDownsampleColorImages=true \
+  -dDownsampleGrayImages=true \
+  -dDownsampleMonoImages=true \
+  -dColorImageResolution=$dpi \
+  -dGrayImageResolution=$dpi \
+  -dMonoImageResolution=$dpi \
+  -dColorImageDownsampleThreshold=1.0 \
+  -dGrayImageDownsampleThreshold=1.0 \
+  -dMonoImageDownsampleThreshold=1.0 \
+   "${pdffile}"