From 3c303c0dfda28d149b8b142fd758a19dc354b226 Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Mon, 13 Mar 2006 11:20:58 +0000
Subject: Add proper handling for animations with frame offset tables during
 decoding

svn-id: r21255
---
 engines/lure/hotspots.cpp | 10 +++++++++-
 engines/lure/luredefs.h   |  3 +++
 2 files changed, 12 insertions(+), 1 deletion(-)

(limited to 'engines')

diff --git a/engines/lure/hotspots.cpp b/engines/lure/hotspots.cpp
index 0721df22b7..01da3ab674 100644
--- a/engines/lure/hotspots.cpp
+++ b/engines/lure/hotspots.cpp
@@ -171,7 +171,15 @@ void Hotspot::setAnimation(HotspotAnimData *newRecord) {
 	MemoryBlock &mDest = _frames->data();
 
 	for (uint16 frameCtr = 0; frameCtr < _numFrames; ++frameCtr, ++headerEntry) {
-		
+
+		if ((newRecord->flags & PIXELFLAG_HAS_TABLE) != 0) {
+			// For animations with an offset table, set the source point for each frame
+			uint16 frameOffset = *((uint16 *) (src->data() + ((frameCtr + 1) * sizeof(uint16)))) + 0x40;
+			if (frameOffset + _height * (_width / 2) > dest->size()) 
+				error("Invalid frame offset in animation %x", newRecord->animRecordId);
+			pSrc = dest->data() + frameOffset;
+		}
+
 		// Copy over the frame, applying the colour offset to each nibble
 		for (uint16 yPos = 0; yPos < _height; ++yPos) {
 			pDest = mDest.data() + (yPos * _numFrames + frameCtr) * _width;
diff --git a/engines/lure/luredefs.h b/engines/lure/luredefs.h
index d259502811..242299bea9 100644
--- a/engines/lure/luredefs.h
+++ b/engines/lure/luredefs.h
@@ -202,6 +202,9 @@ enum Action {
 // Misc constants
 #define VOICE_ANIM_ID 0x5810
 
+// Pixel record flags
+#define PIXELFLAG_HAS_TABLE 4
+
 } // End of namespace Lure
 
 #endif
-- 
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