Allow the window manager to handle centered, fit and fill backdrops

cde/include/Dt/Wsm.h

@@ -52,10 +52,19 @@ extern "C" {
 #define DtWSM_REASON_CURRENT	4
 
 
+
 /*
  * Types
  */
 
+/* Which style is the workspace background image */
+typedef enum {
+  DtWSM_BACKDROP_IMAGETYPE_TILED  = 0,
+  DtWSM_BACKDROP_IMAGETYPE_CENTER = 1,
+  DtWSM_BACKDROP_IMAGETYPE_FIT    = 2,
+  DtWSM_BACKDROP_IMAGETYPE_FILL   = 3
+} DtWsmBackdropImageType;
+
 /* Workspace property information */
 
 typedef struct _DtWsmWorkspaceInfo {
@@ -67,6 +76,7 @@ typedef struct _DtWsmWorkspaceInfo {
 	char		*pchTitle;
 	Window		*backdropWindows;
 	int		numBackdropWindows;
+	DtWsmBackdropImageType	imageType; /**< Tiled, Center, Fit, Fill */
 } DtWsmWorkspaceInfo;
 
 

cde/include/Dt/WsmP.h

@@ -447,7 +447,7 @@ _DtWmRestart(
 
 /*************************************<->*************************************
  *
- *  int _DtWsmChangeBackdrop (display, root, path, pixmap)
+ *  int _DtWsmChangeBackdrop (display, root, path, pixmap, imageType)
  *
  *
  *  Description:
@@ -461,6 +461,7 @@ _DtWmRestart(
  *  root	- root window of screen
  *  path	- file path to bitmap file
  *  pixmap	- pixmap id of backdrop pixmap
+ *  imageType	- Style of backdrop, tiled, center, fit or fill
  *
  *  Returns:
  *  --------
@@ -472,7 +473,8 @@ _DtWsmChangeBackdrop (
 	Display *display, 
 	Window root, 
 	char *path, 
-	Pixmap pixmap);
+	Pixmap pixmap,
+	DtWsmBackdropImageType imageType);
 
 /*************************************<->*************************************
  *