ZVISION: Create method to clear the working window area of the screen to a single color

2 files changed, 17 insertions, 0 deletions

diff --git a/engines/zvision/render_manager.cpp b/engines/zvision/render_manager.cpp
index 4e67cbbd7b..6c006d9320 100644
--- a/engines/zvision/render_manager.cpp
+++ b/engines/zvision/render_manager.cpp
@@ -79,6 +79,16 @@ void RenderManager::update(uint deltaTimeInMillis) {
 	}
 }
 
+void RenderManager::clearWorkingWindowToColor(uint16 color) {
+	uint32 workingWindowSize = _workingWidth * _workingHeight;
+
+	for (uint32 i = 0; i < workingWindowSize; i++) {
+		_workingWindowBuffer[i] = color;
+	}
+
+	_system->copyRectToScreen(_workingWindowBuffer, _workingWidth * sizeof(uint16), _workingWindow.left, _workingWindow.top, _workingWidth, _workingHeight);
+}
+
 void RenderManager::renderSubRectToScreen(Graphics::Surface &surface, int16 destinationX, int16 destinationY, bool wrap, bool isTransposed) {	
 	int16 subRectX = 0;
 	int16 subRectY = 0;
diff --git a/engines/zvision/render_manager.h b/engines/zvision/render_manager.h
index 5b517031ae..d82e40fa4c 100644
--- a/engines/zvision/render_manager.h
+++ b/engines/zvision/render_manager.h
@@ -103,6 +103,13 @@ public:
 	void update(uint deltaTimeInMillis);
 
 	/**
+	 * Fills the entire workingWindow with the specified color
+	 *
+	 * @param color    The color to fill the working window with. (In RGB 555)
+	 */
+	void clearWorkingWindowToColor(uint16 color);
+
+	/**
 	 * Blits the image or a portion of the image to the backbuffer. Actual screen updates won't happen until the end of the frame.
 	 * The image will be clipped to fit inside the working window. Coords are in working window space, not screen space!
 	 *