Added Dirty Rect handling functionality

svn-id: r43406

1 files changed, 11 insertions, 0 deletions

diff --git a/engines/cruise/mainDraw.cpp b/engines/cruise/mainDraw.cpp
index 047f00ee90..61e8f8d85c 100644
--- a/engines/cruise/mainDraw.cpp
+++ b/engines/cruise/mainDraw.cpp
@@ -1121,6 +1121,8 @@ void mainDrawPolygons(int fileIndex, cellStruct *plWork, int X, int scale, int Y
 	if (spriteY1 == spriteY2)
 		return;
 
+	gfxModuleData_addDirtyRect(Common::Rect(spriteX2, spriteY2, spriteX1, spriteY1));
+
 	var_8 = 0;
 
 	memset(polygonMask, 0xFF, (320*200) / 8);
@@ -1177,6 +1179,8 @@ void drawMessage(const gfxEntryStruct *pGfxPtr, int globalX, int globalY, int wi
 			globalY = 198 - pGfxPtr->height;
 		}
 
+		gfxModuleData_addDirtyRect(Common::Rect(globalX, globalY, globalX + width, globalY + height));
+
 		initialOuput = ouputPtr + (globalY * 320) + globalX;
 
 		for (yp = 0; yp < height; yp++) {
@@ -1206,6 +1210,9 @@ void drawSprite(int width, int height, cellStruct *currentObjPtr, const uint8 *d
 	int x = 0;
 	int y = 0;
 
+	// Flag the given area as having been changed
+	gfxModuleData_addDirtyRect(Common::Rect(xs, ys, xs + width - 1, ys + height - 1));
+
 	cellStruct* plWork = currentObjPtr;
 	int workBufferSize = height * (width / 8);
 
@@ -1406,6 +1413,10 @@ void mainDraw(int16 param) {
 
 	if (bgPtr) {
 		gfxModuleData_gfxCopyScreen(bgPtr, gfxModuleData.pPage10);
+		if (backgroundChanged[masterScreen]) {
+			backgroundChanged[masterScreen] = false;
+			gfxModuleData_addDirtyRect(Common::Rect(0, 0, 320, 200));
+		}
 	}
 
 	autoCellHead.next = NULL;