Some fixes for the Gob3 demos

svn-id: r26435

3 files changed, 11 insertions, 7 deletions

diff --git a/engines/gob/driver_vga.cpp b/engines/gob/driver_vga.cpp
index 759136180e..4923387ef8 100644
--- a/engines/gob/driver_vga.cpp
+++ b/engines/gob/driver_vga.cpp
@@ -105,8 +105,8 @@ void VGAVideoDriver::drawSprite(SurfaceDesc *source, SurfaceDesc *dest,
 	    (y >= dest->getHeight()) || (y < 0))
 		return;
 
-	int16 width = (right - left) + 1;
-	int16 height = (bottom - top) + 1;
+	int16 width = MIN((right - left) + 1, (int) dest->getWidth());
+	int16 height = MIN((bottom - top) + 1, (int) dest->getHeight());
 
 	byte *srcPos = source->getVidMem() + (top * source->getWidth()) + left;
 	byte *destPos = dest->getVidMem() + (y * dest->getWidth()) + x;
diff --git a/engines/gob/inter_v1.cpp b/engines/gob/inter_v1.cpp
index d213b601e4..052aef0e25 100644
--- a/engines/gob/inter_v1.cpp
+++ b/engines/gob/inter_v1.cpp
@@ -1775,7 +1775,7 @@ bool Inter_v1::o1_return(OpFuncParams &params) {
 		_break = true;
 
 	_vm->_global->_inter_execPtr = 0;
-	return false;
+	return true;
 }
 
 bool Inter_v1::o1_renewTimeInVars(OpFuncParams &params) {
diff --git a/engines/gob/inter_v2.cpp b/engines/gob/inter_v2.cpp
index 819ba6df11..222ce8ee2b 100644
--- a/engines/gob/inter_v2.cpp
+++ b/engines/gob/inter_v2.cpp
@@ -1409,10 +1409,14 @@ void Inter_v2::o2_scroll() {
 	int16 curX;
 	int16 curY;
 
-	startX = _vm->_parse->parseValExpr();
-	startY = _vm->_parse->parseValExpr();
-	endX = _vm->_parse->parseValExpr();
-	endY = _vm->_parse->parseValExpr();
+	startX = CLIP((int) _vm->_parse->parseValExpr(), 0,
+			_vm->_video->_surfWidth - 320);
+	startY = CLIP((int) _vm->_parse->parseValExpr(), 0,
+			_vm->_video->_surfHeight - 200);
+	endX = CLIP((int) _vm->_parse->parseValExpr(), 0,
+			_vm->_video->_surfWidth - 320);
+	endY = CLIP((int) _vm->_parse->parseValExpr(), 0,
+			_vm->_video->_surfHeight - 200);
 	stepX = _vm->_parse->parseValExpr();
 	stepY = _vm->_parse->parseValExpr();