From 37a55b03716139bdc88b0cd444e8b0eabab6669d Mon Sep 17 00:00:00 2001
From: Greg Darke <greg@tsukasa.net.au>
Date: Fri, 13 Mar 2009 20:31:47 +1100
Subject: [PATCH] Merged in the wallpaper setting code for Windows (Tested on
 Windows XP, without PIL).

---
 wallchanger.py | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/wallchanger.py b/wallchanger.py
index a9c8945..7386293 100755
--- a/wallchanger.py
+++ b/wallchanger.py
@@ -21,6 +21,10 @@ def set_image(filename):
 def init(*args, **kwargs):
 	"""Desktop Changer factory"""
 
+	if sys.platform == "win32":
+		changers.append(WIN32Changer(*args, **kwargs))
+		return
+
 	logging.debug("Testing for OSX (NonX11)")
 	if commands.getstatusoutput("ps ax -o command -c|grep -q WindowServer")[0] == 0:
 		changers.append(OSXChanger(*args, **kwargs))
@@ -178,6 +182,61 @@ class OSXChanger(BaseChanger):
 		logging.debug(cmd)
 		return not commands.getstatusoutput(cmd)[0]
 
+class WIN32Changer(BaseChanger):
+	name = "Windows"
+	_ConvertedWallpaperLocation = os.path.join(os.environ.get('APPDATA', os.path.expanduser('~')), 'wallchanger')
+
+	def __init__(self, *args, **kwargs):
+		BaseChanger.__init__(self, *args, **kwargs)
+		if not self.convert:
+			logging.warn('Running on windows, but convert is not set')
+
+	def remove_old_image_cache(self):
+		"""Cleans up any old temp images"""
+		if not os.path.isdir(self._ConvertedWallpaperLocation):
+			os.mkdir(self._ConvertedWallpaperLocation)
+		for fullpath, filenames, dirnames in os.walk(self._ConvertedWallpaperLocation, topdown=False):
+			for filename in filenames:
+				os.unlink(os.path.join(fullpath, filename))
+			for dirname in dirnames:
+				os.unlink(os.path.join(fullpath, dirname))
+
+	def convert_image_format(self, file):
+		"""Convert the image to a bmp, and store it in a local place"""
+		self.remove_old_image_cache()
+		output_name = os.path.join(self._ConvertedWallpaperLocation, '%s.bmp' % time.time())
+		import PIL, PIL.Image
+		img = PIL.Image.open(file)
+		if img.mode == 'RGBA':
+			img = img.convert('RGB')
+		img.save(output_name, 'BMP')
+
+		return output_name, True
+
+	def set_image(self, filename):
+		import ctypes
+		user32 = ctypes.windll.user32
+
+		# Taken from the Platform SDK
+		SPI_SETDESKWALLPAPER = 20
+		SPIF_SENDWININICHANGE = 2
+
+		if self.convert:
+			filename, ret = self.convert_image_format(filename)
+			if not ret:
+				logging.debug("Convert failed")
+				return False
+
+		# Parameters for SystemParametersInfoA are:
+		# (UINT uiAction, UINT uiParam, PVOID pvParam, UINT fWinIni)
+		user32.SystemParametersInfoA(
+			SPI_SETDESKWALLPAPER,
+			0,
+			filename,
+			SPIF_SENDWININICHANGE,
+		)
+		return True
+
 class GnomeChanger(BaseChanger):
 	name = "Gnome"
 	def set_image(self, file):
-- 
2.39.2