Standardized context frame save/restore; not yet used everywhere it should be

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3345 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/uqm/gameopt.c

@@ -1105,15 +1105,9 @@ PickGame (MENU_STATE *pMS)
 	LockMutex (GraphicsLock);
 	OldContext = SetContext (SpaceContext);
 
-	DlgStamp.origin.x = 0;
-	DlgStamp.origin.y = 0;
 	// Save the current state of the screen for later restoration
-	DlgRect.corner.x = SIS_ORG_X;
-	DlgRect.corner.y = SIS_ORG_Y;
-	DlgRect.extent.width = SIS_SCREEN_WIDTH;
-	DlgRect.extent.height = SIS_SCREEN_HEIGHT;
-	DlgStamp.frame = CaptureDrawable (LoadDisplayPixmap (
-			&DlgRect, (FRAME)0));
+	DlgStamp = SaveContextFrame (NULL);
+	GetContextClipRect (&DlgRect);
 
 	pMS->Initialized = FALSE;
 	pMS->InputFunc = DoPickGame;

sc2/src/uqm/planets/report.c

@@ -23,6 +23,7 @@
 #include "../controls.h"
 #include "../gamestr.h"
 #include "../setup.h"
+#include "../util.h"
 #include "../sounds.h"
 #include "../uqmdebug.h"
 #include "options.h"
@@ -238,6 +239,7 @@ DoDiscoveryReport (SOUND ReadOutSounds)
 	CONTEXT OldContext;
 	CONTEXT context;
 	BOOLEAN ownContext;
+	STAMP saveStamp;
 
 #ifdef DEBUG
 	if (disableInteractivity)
@@ -246,6 +248,7 @@ DoDiscoveryReport (SOUND ReadOutSounds)
 
 	context = GetScanContext (&ownContext);
 	OldContext = SetContext (context);
+	saveStamp = SaveContextFrame (NULL);
 	{
 		FONT OldFont;
 		FRAME OldFontEffect;
@@ -265,14 +268,8 @@ DoDiscoveryReport (SOUND ReadOutSounds)
 		SetContextFontEffect (OldFontEffect);
 		SetContextFont (OldFont);
 	}
-#ifdef OLD
-	ClearDrawable ();
-	if (pSolarSysState->MenuState.Initialized >= 3)
-		DrawScannedObjects (FALSE);
-#else /* !OLD */
-	if (pSolarSysState->MenuState.Initialized < 3)
-		ClearDrawable ();
-#endif /* OLD */
+	// Restore previous screen
+	DrawStamp (&saveStamp);
 	SetContext (OldContext);
 	// TODO: Make CONTEXT ref-counted
 	if (ownContext)

sc2/src/uqm/util.c

@@ -111,6 +111,32 @@ SeedRandomNumbers (void)
 	return (cur_time);
 }
 
+STAMP
+SaveContextFrame (RECT *saveRect)
+{
+	STAMP s;
+	RECT r;
+
+	GetContextClipRect (&r);
+	if (saveRect)
+	{	// a portion of the context
+		r.corner.x += saveRect->corner.x;
+		r.corner.y += saveRect->corner.y;
+		r.extent = saveRect->extent;
+
+		s.origin = saveRect->corner;
+	}
+	else
+	{	// the entire context
+		s.origin.x = 0;
+		s.origin.y = 0;
+	}
+
+	s.frame = CaptureDrawable (LoadDisplayPixmap (&r, NULL));
+
+	return s;
+}
+
 BOOLEAN
 PauseGame (void)
 {

sc2/src/uqm/util.h

@@ -25,5 +25,8 @@ extern void DrawStarConBox (RECT *pRect, SIZE BorderWidth,
 		COLOR InteriorColor);
 extern DWORD SeedRandomNumbers (void);
 
+// saveRect can be NULL to save the entire context frame
+extern STAMP SaveContextFrame (RECT *saveRect);
+
 #endif  /* _UTIL_H */