GOB: Add PreGob animation utility functions

2 files changed, 27 insertions, 0 deletions

diff --git a/engines/gob/pregob/pregob.cpp b/engines/gob/pregob/pregob.cpp
index 1c3fb8221c..b9c36d7cf8 100644
--- a/engines/gob/pregob/pregob.cpp
+++ b/engines/gob/pregob/pregob.cpp
@@ -29,6 +29,7 @@
 #include "gob/palanim.h"
 #include "gob/draw.h"
 #include "gob/video.h"
+#include "gob/aniobject.h"
 
 #include "gob/pregob/pregob.h"
 
@@ -181,4 +182,24 @@ bool PreGob::hasInput() {
 	return checkInput(mouseX, mouseY, mouseButtons) || (mouseButtons != kMouseButtonsNone);
 }
 
+void PreGob::clearAnim(ANIObject &ani) {
+	int16 left, top, right, bottom;
+
+	if (ani.clear(*_vm->_draw->_backSurface, left, top, right, bottom))
+		_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, left, top, right, bottom);
+}
+
+void PreGob::drawAnim(ANIObject &ani) {
+	int16 left, top, right, bottom;
+
+	if (ani.draw(*_vm->_draw->_backSurface, left, top, right, bottom))
+		_vm->_draw->dirtiedRect(_vm->_draw->_backSurface, left, top, right, bottom);
+	ani.advance();
+}
+
+void PreGob::redrawAnim(ANIObject &ani) {
+	clearAnim(ani);
+	drawAnim(ani);
+}
+
 } // End of namespace Gob
diff --git a/engines/gob/pregob/pregob.h b/engines/gob/pregob/pregob.h
index 4cf4a39fdb..9efdbe8df6 100644
--- a/engines/gob/pregob/pregob.h
+++ b/engines/gob/pregob/pregob.h
@@ -30,6 +30,8 @@ namespace Gob {
 class GobEngine;
 class Surface;
 
+class ANIObject;
+
 class PreGob {
 public:
 	PreGob(GobEngine *vm);
@@ -71,6 +73,10 @@ protected:
 	int16 waitInput();
 	bool  hasInput();
 
+	void clearAnim(ANIObject &ani);
+	void drawAnim(ANIObject &ani);
+	void redrawAnim(ANIObject &ani);
+
 
 	GobEngine *_vm;