Fix walking in IHNM. It appeared that BG mask wasn't flipped upside down

when everything else is :).

svn-id: r19136

3 files changed, 4 insertions, 4 deletions

diff --git a/saga/image.cpp b/saga/image.cpp
index ed2320ef10..95b947e598 100644
--- a/saga/image.cpp
+++ b/saga/image.cpp
@@ -47,7 +47,7 @@ static int granulate(int value, int granularity) {
 }
 
 int SagaEngine::decodeBGImage(const byte *image_data, size_t image_size,
-					byte **output_buf, size_t *output_buf_len, int *w, int *h) {
+				  byte **output_buf, size_t *output_buf_len, int *w, int *h, bool flip) {
 	ImageHeader hdr;
 	int modex_height;
 	const byte *RLE_data_ptr;
@@ -90,7 +90,7 @@ int SagaEngine::decodeBGImage(const byte *image_data, size_t image_size,
 	unbankBGImage(out_buf, decode_buf, hdr.width, hdr.height);
 
 	// For some reason bg images in IHNM are upside down
-	if (getGameType() == GType_IHNM) {
+	if (getGameType() == GType_IHNM && !flip) {
 		flipImage(out_buf, hdr.width, hdr.height);
 	}
 
diff --git a/saga/saga.h b/saga/saga.h
index b6a245e410..0ba789bf3c 100644
--- a/saga/saga.h
+++ b/saga/saga.h
@@ -632,7 +632,7 @@ private:
 
 public:
 	int decodeBGImage(const byte *image_data, size_t image_size,
-						byte **output_buf, size_t *output_buf_len, int *w, int *h);
+			  byte **output_buf, size_t *output_buf_len, int *w, int *h, bool flip = false);
 	const byte *getImagePal(const byte *image_data, size_t image_size);
 	void loadStrings(StringsTable &stringsTable, const byte *stringsPointer, size_t stringsLength);
 
diff --git a/saga/scene.cpp b/saga/scene.cpp
index 13bd9d929a..4e77bc02a2 100644
--- a/saga/scene.cpp
+++ b/saga/scene.cpp
@@ -1040,7 +1040,7 @@ void Scene::processSceneResources() {
 			_bgMask.res_len = resourceDataLength;
 			_bgMask.loaded = 1;
 			_vm->decodeBGImage(_bgMask.res_buf, _bgMask.res_len, &_bgMask.buf,
-							&_bgMask.buf_len, &_bgMask.w, &_bgMask.h);
+							   &_bgMask.buf_len, &_bgMask.w, &_bgMask.h, true);
 
 			// At least in ITE the mask needs to be clipped.