From db536da8d3838bc69cd2c18f49d62e9151d425a5 Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn
Date: Mon, 28 Feb 2011 20:32:46 +0100
Subject: SCI: Skip Ports when iterating over Windows in GC

---
 engines/sci/engine/gc.cpp      | 10 +++++-----
 engines/sci/graphics/helpers.h |  6 ++++++
 engines/sci/graphics/ports.cpp | 12 ++++++++----
 engines/sci/graphics/ports.h   |  3 ---
 4 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/engines/sci/engine/gc.cpp b/engines/sci/engine/gc.cpp
index e080ad6e4b..15be17fd32 100644
--- a/engines/sci/engine/gc.cpp
+++ b/engines/sci/engine/gc.cpp
@@ -89,11 +89,11 @@ static void processEngineHunkList(WorklistManager &wm) {
 	PortList windowList = g_sci->_gfxPorts->_windowList;
 
 	for (PortList::const_iterator it = windowList.begin(); it != windowList.end(); ++it) {
-		// FIXME: We also store Port objects in the window list.
-		// We should add a check that we really only pass windows here...
-		Window *wnd = ((Window *)*it);
-		wm.push(wnd->hSaved1);
-		wm.push(wnd->hSaved2);
+		if ((*it)->isWindow()) {
+			Window *wnd = ((Window *)*it);
+			wm.push(wnd->hSaved1);
+			wm.push(wnd->hSaved2);
+		}
 	}
 }
 
diff --git a/engines/sci/graphics/helpers.h b/engines/sci/graphics/helpers.h
index f6cb214a2b..3c6515ae73 100644
--- a/engines/sci/graphics/helpers.h
+++ b/engines/sci/graphics/helpers.h
@@ -45,6 +45,10 @@ typedef int GuiResourceId; // is a resource-number and -1 means no parameter giv
 
 typedef int16 TextAlignment;
 
+#define PORTS_FIRSTWINDOWID 2
+#define PORTS_FIRSTSCRIPTWINDOWID 3
+
+
 struct Port {
 	uint16 id;
 	int16 top, left;
@@ -62,6 +66,8 @@ struct Port {
 		fontHeight(0), fontId(0), greyedOutput(false),
 		penClr(0), backClr(0xFF), penMode(0), counterTillFree(0) {
 	}
+
+	bool isWindow() const { return id >= PORTS_FIRSTWINDOWID && id != 0xFFFF; }
 };
 
 struct Window : public Port, public Common::Serializable {
diff --git a/engines/sci/graphics/ports.cpp b/engines/sci/graphics/ports.cpp
index b19a8627f9..9aa539a29a 100644
--- a/engines/sci/graphics/ports.cpp
+++ b/engines/sci/graphics/ports.cpp
@@ -246,8 +246,10 @@ void GfxPorts::beginUpdate(Window *wnd) {
 	PortList::iterator it = _windowList.reverse_begin();
 	const PortList::iterator end = Common::find(_windowList.begin(), _windowList.end(), wnd);
 	while (it != end) {
-		// FIXME: We also store Port objects in the window list.
-		// We should add a check that we really only pass windows here...
+		// We also store Port objects in the window list, but they
+		// shouldn't be encountered during this iteration.
+		assert((*it)->isWindow());
+
 		updateWindow((Window *)*it);
 		--it;
 	}
@@ -263,8 +265,10 @@ void GfxPorts::endUpdate(Window *wnd) {
 	assert(it != end);
 
 	while (++it != end) {
-		// FIXME: We also store Port objects in the window list.
-		// We should add a check that we really only pass windows here...
+		// We also store Port objects in the window list, but they
+		// shouldn't be encountered during this iteration.
+		assert((*it)->isWindow());
+
 		updateWindow((Window *)*it);
 	}
 
diff --git a/engines/sci/graphics/ports.h b/engines/sci/graphics/ports.h
index b94d54ab10..9faee2be8d 100644
--- a/engines/sci/graphics/ports.h
+++ b/engines/sci/graphics/ports.h
@@ -37,9 +37,6 @@ class GfxPaint16;
 class GfxScreen;
 class GfxText16;
 
-#define PORTS_FIRSTWINDOWID 2
-#define PORTS_FIRSTSCRIPTWINDOWID 3
-
 // window styles
 enum {
 	SCI_WINDOWMGR_STYLE_TRANSPARENT = (1 << 0),
-- 
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