1 files changed, 142 insertions, 0 deletions
diff --git a/engines/kyra/screen.cpp b/engines/kyra/screen.cpp
index 0fe23552b7..5077720133 100644
--- a/engines/kyra/screen.cpp
+++ b/engines/kyra/screen.cpp
@@ -339,6 +339,148 @@ void Screen::clearCurPage() {
 	clearOverlayPage(_curPage);
 }
 
+void Screen::copyWsaRect(int x, int y, int w, int h, int dimState, int plotFunc, const uint8 *src,
+						int unk1, const uint8 *unkPtr1, const uint8 *unkPtr2) {
+	uint8 *dstPtr = getPagePtr(_curPage);
+	uint8 *origDst = dstPtr;
+
+	const ScreenDim *dim = getScreenDim(dimState);
+	int dimX1 = dim->sx << 3;
+	int dimX2 = dim->w << 3;
+	dimX2 += dimX1;
+
+	int dimY1 = dim->sy;
+	int dimY2 = dim->h;
+	dimY2 += dimY1;
+
+	int temp = y - dimY1;
+	if (temp < 0) {
+		if ((temp += h) <= 0)
+			return;
+		else {
+			SWAP(temp, h);
+			y += temp - h;
+			src += (temp - h) * w;
+		}
+	}
+
+	temp = dimY2 - y;
+	if (temp <= 0)
+		return;
+
+	if (temp < h)
+		h = temp;
+
+	int srcOffset = 0;
+	temp = x - dimX1;
+	if (temp < 0) {
+		temp = -temp;
+		srcOffset = temp;
+		x += temp;
+		w -= temp;
+	}
+
+	int srcAdd = 0;
+
+	temp = dimX2 - x;
+	if (temp <= 0)
+		return;
+
+	if (temp < w) {
+		SWAP(w, temp);
+		temp -= w;
+		srcAdd = temp;
+	}
+
+	dstPtr += y * SCREEN_W + x;
+	uint8 *dst = dstPtr;
+
+	if (_curPage == 0 || _curPage == 1)
+		addDirtyRect(x, y, w, h);
+
+	clearOverlayRect(_curPage, x, y, w, h);
+
+	temp = h;
+	int curY = y;
+	while (h--) {
+		src += srcOffset;
+		++curY;
+		int cW = w;
+
+		switch (plotFunc) {
+		case 0:
+			memcpy(dst, src, cW);
+			dst += cW; src += cW;
+			break;
+
+		case 1:
+			while (cW--) {
+				uint8 d = *src++;
+				uint8 t = unkPtr1[d];
+				if (t != 0xFF)
+					d = unkPtr2[*dst + (t << 8)];
+				*dst++ = d;
+			}
+			break;
+
+		case 4:
+			while (cW--) {
+				uint8 d = *src++;
+				if (d)
+					*dst = d;
+				++dst;
+			}
+			break;
+
+		case 5:
+			while (cW--) {
+				uint8 d = *src++;
+				if (d) {
+					uint8 t = unkPtr1[d];
+					if (t != 0xFF)
+						d = unkPtr2[*dst + (t << 8)];
+					*dst = d;
+				}
+				++dst;
+			}
+			break;
+
+		case 8:
+		case 9:
+			while (cW--) {
+				uint8 d = *src++;
+				uint8 t = _shapePages[0][dst - origDst] & 7;
+				if (unk1 < t && (curY > _maskMinY && curY < _maskMaxY))
+					d = _shapePages[1][dst - origDst];
+				*dst++ = d;
+			}
+			break;
+
+		case 12:
+		case 13:
+			while (cW--) {
+				uint8 d = *src++;
+				if (d) {
+					uint8 t = _shapePages[0][dst - origDst] & 7;
+					if (unk1 < t && (curY > _maskMinY && curY < _maskMaxY))
+						d = _shapePages[1][dst - origDst];
+					*dst++ = d;
+				} else {
+					d = _shapePages[1][dst - origDst];
+					*dst++ = d;
+				}
+			}
+			break;
+
+		default:
+			break;
+		}
+
+		dst = (dstPtr += SCREEN_W);
+		src += srcAdd;
+	}
+}
+
 uint8 Screen::getPagePixel(int pageNum, int x, int y) {
 	assert(pageNum < SCREEN_PAGE_NUM);
 	assert(x >= 0 && x < SCREEN_W && y >= 0 && y < SCREEN_H);