convert scripts to python for portability

.gitignore

@@ -59,4 +59,6 @@ sysinfo.txt
 # Crashlytics generated file
 crashlytics-build.properties
 
+# Python files
+**/__pycache__
 

Scripts/README.md

@@ -1,19 +1,23 @@
 # Scripts
 
-Bash scripts for interacting with files
+Python scripts for interacting with files
 
 ## Installation
 
-All files require bash to be installed (default location of `/bin/bash`). 
+All files require python3 to be installed.
 
-`convert2dds` and `dds2png` require [ImageMagick](https://imagemagick.org/index.php) and [Nvidia Texture Tools](https://github.com/HeliumProject/NvidiaTextureTools) to be installed and available in your `$PATH`.
+`ddscompress`, `ddsdecompress` and `ddsck` require [ImageMagick](https://imagemagick.org/index.php) and [Nvidia Texture Tools](https://github.com/HeliumProject/NvidiaTextureTools) to be installed and available in your `$PATH`.
 
 ## Usage
 
-### convert2dds
+### ddscompress.py
 
-converts any number of files to `.dds` format, automatically choosing dxt1 or dxt5 depending on if the source image has anything in its alpha channel. Designed to be used with a glob, e.g: `convert2dds *.png`
+Converts any number of files to `.dds` format, automatically choosing dxt1 or dxt5 depending on if the source image has anything in its alpha channel. Designed to be used with a glob, e.g: `ddscompress.py *.png`
 
-### dds2png
+### ddsdecompress.py
 
-converts any number of files to `.png` from `.dds`. Designed to be used with a glob, e.g: `dds2png *.dds`
+Converts any number of files to `.png` from `.dds`. Designed to be used with a glob, e.g: `ddsdecompress.py *.dds`
+
+### ddsck.py
+
+Checks any number of dds files for common issues, including formats not supported by KSP, and DXT5 textures that don't use the alpha channel. Designed to be used with a glob, e.g: `ddsck.py *.dds`

Scripts/convert2dds

@@ -1,36 +0,0 @@
-#!/bin/bash
-
-mkdir -p /tmp/dds > /dev/null
-tool="nvcompress"
-
-for file in "$@"
-do
-    echo "$file"
-    dirname=$(dirname "$file")
-    basename=$(basename "$file")
-    extname="${file#${file%.*}}"
-    filename=$(basename "$basename" "$extname")
-
-    convert -flip "$file" "/tmp/dds/$basename"
-    alpha=$(convert "$file" -resize 1x1 -format "%[fx:int(255*a+.5)]" info:-)
-    if [ "$tool" == "crunch" ]
-    then
-        if [ $alpha -lt 255 ]
-        then
-            format="-dxt5"
-        else
-            format="-dxt1"
-        fi
-
-        crunch -quiet -file "/tmp/dds/$basename" -fileformat dds $format && rm $file
-    else
-        if [ $alpha -lt 255 ]
-        then
-            format="-bc3"
-        else
-            format="-bc1"
-        fi
-
-        nvcompress $format "/tmp/dds/$basename" "$dirname/$filename.dds" && rm $file
-    fi
-done

Scripts/dds.py

@@ -0,0 +1,30 @@
+import subprocess
+import re
+
+def alpha(file):
+    result = subprocess.run(["convert", file, "-resize", "1x1", "-format", "%[fx:int(255*a+.5)]", "info:-"], capture_output=True)
+    result.check_returncode()
+    return int(result.stdout)
+
+def flip(file, output):
+    result = subprocess.run(['convert', '-flip', file, output], capture_output=True)
+    result.check_returncode()
+    
+def nvcompress(format, file, output):
+    result = subprocess.run(['nvcompress', format, file, output], capture_output=True)
+    result.check_returncode()
+    print(result)
+    
+def nvdecompress(file, output):
+    result = subprocess.run(['nvdecompress', '-format', 'png', file, output], capture_output=True)
+    result.check_returncode()
+
+def nvinfo(file):
+    result = subprocess.run(['nvddsinfo', file], capture_output=True)
+    result.check_returncode()
+    
+    info = {
+        "format": re.search(r"FourCC: '(.{4})'", str(result.stdout)).group(1)
+    }
+    
+    return info

Scripts/dds2png

@@ -1,14 +0,0 @@
-#!/bin/bash
-
-mkdir -p /tmp/dds > /dev/null
-
-for file in "$@"
-do
-    echo "$file"
-    dirname=$(dirname "$file")
-    basename=$(basename "$file")
-    extname="${file#${file%.*}}"
-    filename=$(basename "$basename" "$extname")
-
-    convert -flip "$file" "$dirname/$filename.png" && rm $file
-done

Scripts/ddsck.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import dds
+
+for argv in sys.argv[1:]:
+    file = os.path.abspath(argv)
+    output = os.path.splitext(file)[0] + ".png"
+
+    info = dds.nvinfo(file)
+    format = info["format"]
+    alpha = dds.alpha(file)
+    
+    if format == "DXT1":
+        pass
+    elif format == "DXT5":
+    	if alpha > 254:
+    		print(f'[{argv}]: Image is DXT5 but has no alpha channel')
+    else:
+    	print(f'[{argv}]: incompatible format')

Scripts/ddscompress.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import tempfile
+import dds
+
+with tempfile.TemporaryDirectory(prefix="dds") as tempDir:
+    for argv in sys.argv[1:]:
+        print(f'[{argv}]: converting to dds')
+        file = os.path.abspath(argv)
+        tmpOutput = os.path.join(tempDir, os.path.basename(file))
+        output = os.path.splitext(file)[0] + ".dds"
+        
+        alpha = dds.alpha(file)
+        dds.flip(file, tmpOutput)
+                    
+        print(alpha)
+        if alpha < 255:
+            format = "-bc3"
+        else:
+            format = "-bc1"
+        print(format)
+        dds.nvcompress(format, tmpOutput, output)
+        os.remove(file)

Scripts/ddsdecompress.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import dds
+
+for argv in sys.argv[1:]:
+    print(f'[{argv}]: converting from dds')
+    file = os.path.abspath(argv)
+    output = os.path.splitext(file)[0] + ".png"
+
+    dds.nvdecompress(file, output)
+    os.remove(file)