From b88f1b716ba5a4452671d6045ce0662660a4acc6 Mon Sep 17 00:00:00 2001
From: Piotr Dziwinski <piotrdz@gmail.com>
Date: Sat, 11 May 2013 21:43:16 +0200
Subject: [PATCH] Scripts for non-power-of 2 textures

---
 tools/convert-npow2.sh | 15 +++++++++++++++
 tools/find-npow2.sh    | 20 ++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100755 tools/convert-npow2.sh
 create mode 100755 tools/find-npow2.sh

diff --git a/tools/convert-npow2.sh b/tools/convert-npow2.sh
new file mode 100755
index 00000000..130c0306
--- /dev/null
+++ b/tools/convert-npow2.sh
@@ -0,0 +1,15 @@
+function nearest_pow2 {
+    python -c "import math; print(2 ** int(math.ceil(math.log($1) / math.log(2.0))))"
+}
+
+mkdir -p new
+
+for file in $@ do
+  size=$(identify $file | cut -d' ' -f 3)
+  w=$(echo $size | cut -d'x' -f 1)
+  h=$(echo $size | cut -d'x' -f 2)
+  n_w=$(nearest_pow2 $w)
+  n_h=$(nearest_pow2 $h)
+  echo "$file: ${w}x${h} -> ${n_w}x${n_h}"
+  convert $file -resize ${n_w}x${n_h}\! new/$file
+done
diff --git a/tools/find-npow2.sh b/tools/find-npow2.sh
new file mode 100755
index 00000000..08c2cd63
--- /dev/null
+++ b/tools/find-npow2.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+function check_npow2 {
+    ans=`python -c "import math; l = math.log($1) / math.log(2.0); print(2**int(l) != $1)"`
+    if [ "$ans" == "True" ]; then
+        echo "1"
+    else
+        echo "0"
+    fi
+}
+
+for file in textures/*; do
+    x_res=`identify $file | sed -E -n 's/.* ([0-9]+)x[0-9]+\+[0-9]+\+[0-9]+ .*/\1/p'`
+    y_res=`identify $file | sed -E -n 's/.* [0-9]+x([0-9]+)\+[0-9]+\+[0-9]+ .*/\1/p'`
+    npow_x=`check_npow2 $x_res`
+    npow_y=`check_npow2 $y_res`
+    if [ "$npow_x" == "1" -o "$npow_y" == "1" ]; then
+        echo "`basename $file`: non-pow2 dimensions: ${x_res}x${y_res}"
+    fi
+done