From 1dbe5bfccfb3d10b31ea9b5ac567165c650b3f98 Mon Sep 17 00:00:00 2001
From: Jussi Pitkanen
Date: Sun, 19 Jun 2011 17:46:23 +0300
Subject: AGI: Implement loader for V1 "object" file

---
 engines/agi/agi.h         |  9 +++++++--
 engines/agi/loader_v1.cpp | 10 ++++++++--
 engines/agi/objects.cpp   | 36 +++++++++++++++++++++++++-----------
 3 files changed, 40 insertions(+), 15 deletions(-)

diff --git a/engines/agi/agi.h b/engines/agi/agi.h
index 48a9aa5fbd..1c89718a6e 100644
--- a/engines/agi/agi.h
+++ b/engines/agi/agi.h
@@ -969,16 +969,21 @@ public:
 	void checkQuickLoad();
 
 	// Objects
+public:
 	int showObjects();
-	int decodeObjects(uint8 *mem, uint32 flen);
 	int loadObjects(const char *fname);
-	int allocObjects(int);
+	int loadObjects(Common::File &fp);
 	void unloadObjects();
 	const char *objectName(unsigned int);
 	int objectGetLocation(unsigned int);
 	void objectSetLocation(unsigned int, int);
+private:
+	int decodeObjects(uint8 *mem, uint32 flen);
+	int readObjects(Common::File &fp, int flen);
+	int allocObjects(int);
 
 	// Logic
+public:
 	int decodeLogic(int);
 	void unloadLogic(int);
 	int runLogic(int);
diff --git a/engines/agi/loader_v1.cpp b/engines/agi/loader_v1.cpp
index 02a20c9bc8..8da74cefed 100644
--- a/engines/agi/loader_v1.cpp
+++ b/engines/agi/loader_v1.cpp
@@ -45,6 +45,7 @@
 #define BC_SNDDIR_SEC	SECTOR_OFFSET(99) + 5
 #define BC_SNDDIR_MAX	29
 #define BC_WORDS		SECTOR_OFFSET(0x26D) + 5
+#define BC_OBJECTS		SECTOR_OFFSET(0x1E6) + 3
 
 namespace Agi {
 
@@ -308,9 +309,14 @@ int AgiLoader_v1::unloadResource(int t, int n) {
 	return errOK;
 }
 
-// TODO: Find the disk image equivalent.
 int AgiLoader_v1::loadObjects(const char *fname) {
-	return _vm->loadObjects(fname);
+	if (_vm->getGameID() == GID_BC) {
+		Common::File f;
+		f.open(_filenameDisk0);
+		f.seek(BC_OBJECTS, SEEK_SET);
+		return _vm->loadObjects(f);
+	}
+	return errOK;
 }
 
 int AgiLoader_v1::loadWords(const char *fname) {
diff --git a/engines/agi/objects.cpp b/engines/agi/objects.cpp
index e04c9742f3..efc8645287 100644
--- a/engines/agi/objects.cpp
+++ b/engines/agi/objects.cpp
@@ -34,7 +34,7 @@ int AgiEngine::allocObjects(int n) {
 }
 
 int AgiEngine::decodeObjects(uint8 *mem, uint32 flen) {
-	unsigned int i, so, padsize;
+	unsigned int i, so, padsize, spos;
 
 	padsize = _game.gameFlags & ID_AMIGA ? 4 : 3;
 
@@ -64,11 +64,12 @@ int AgiEngine::decodeObjects(uint8 *mem, uint32 flen) {
 		return errNotEnoughMemory;
 
 	// build the object list
-	for (i = 0, so = padsize; i < _game.numObjects; i++, so += padsize) {
+	spos = getVersion() >= 0x2000 ? padsize : 0;
+	for (i = 0, so = spos; i < _game.numObjects; i++, so += padsize) {
 		int offset;
 
 		(_objects + i)->location = *(mem + so + 2);
-		offset = READ_LE_UINT16(mem + so) + padsize;
+		offset = READ_LE_UINT16(mem + so) + spos;
 
 		if ((uint) offset < flen) {
 			(_objects + i)->name = (char *)strdup((const char *)mem + offset);
@@ -84,20 +85,33 @@ int AgiEngine::decodeObjects(uint8 *mem, uint32 flen) {
 
 int AgiEngine::loadObjects(const char *fname) {
 	Common::File fp;
-	uint32 flen;
-	uint8 *mem;
-
-	_objects = NULL;
-	_game.numObjects = 0;
 
 	debugC(5, kDebugLevelResources, "(Loading objects '%s')", fname);
 
 	if (!fp.open(fname))
 		return errBadFileOpen;
 
-	fp.seek(0, SEEK_END);
-	flen = fp.pos();
-	fp.seek(0, SEEK_SET);
+	return readObjects(fp, fp.size());
+}
+
+/**
+ * Loads an object file that is in the common VOL resource format. Expects
+ * the file pointer to point to the last field in header, ie. file length.
+ * This is used at least by the V1 booter games.
+ */
+int AgiEngine::loadObjects(Common::File &fp) {
+	int flen = fp.readUint16LE();
+	return readObjects(fp, flen);
+}
+
+/**
+ * Read and decode objects, and store them in the internal structure.
+ *
+ * @param  fp    File pointer
+ * @param  flen  File length
+ */
+int AgiEngine::readObjects(Common::File &fp, int flen) {
+	uint8 *mem;
 
 	if ((mem = (uint8 *)calloc(1, flen + 32)) == NULL) {
 		fp.close();
-- 
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