From b4afb591a7465220ca40811924645932f568f319 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Thu, 13 Jun 2019 11:57:43 +0200
Subject: implemented GTA stream read functions

---
 src/RwClumpRead.cpp | 230 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 230 insertions(+)
 create mode 100644 src/RwClumpRead.cpp

(limited to 'src/RwClumpRead.cpp')

diff --git a/src/RwClumpRead.cpp b/src/RwClumpRead.cpp
new file mode 100644
index 00000000..c9f027e7
--- /dev/null
+++ b/src/RwClumpRead.cpp
@@ -0,0 +1,230 @@
+#include "common.h"
+#include "patcher.h"
+
+struct rpGeometryList
+{
+	RpGeometry **geometries;
+	int32 numGeoms;
+};
+
+struct rpAtomicBinary
+{
+	RwInt32 frameIndex;
+	RwInt32 geomIndex;
+	RwInt32 flags;
+	RwInt32 unused;
+};
+
+static int32 numberGeometrys;
+static int32 streamPosition;
+static rpGeometryList gGeomList;
+static rwFrameList gFrameList;
+static RpClumpChunkInfo gClumpInfo;
+
+rpGeometryList*
+GeometryListStreamRead1(RwStream *stream, rpGeometryList *geomlist)
+{
+	int i;
+	RwUInt32 size, version;
+	RwInt32 numGeoms;
+
+	numberGeometrys = 0;
+	if(!RwStreamFindChunk(stream, rwID_STRUCT, &size, &version))
+		return nil;
+	assert(size == 4);
+	if(RwStreamRead(stream, &numGeoms, 4) != 4)
+		return nil;
+
+	numberGeometrys = numGeoms/2;
+	geomlist->numGeoms = numGeoms;
+	if(geomlist->numGeoms > 0){
+		geomlist->geometries = (RpGeometry**)RwMalloc(geomlist->numGeoms * sizeof(RpGeometry*));
+		if(geomlist->geometries == nil)
+			return nil;
+		memset(geomlist->geometries, 0, geomlist->numGeoms * sizeof(RpGeometry*));
+	}else
+		geomlist->geometries = nil;
+
+	for(i = 0; i < numberGeometrys; i++){
+		if(!RwStreamFindChunk(stream, rwID_GEOMETRY, nil, &version))
+			return nil;
+		geomlist->geometries[i] = RpGeometryStreamRead(stream);
+		if(geomlist->geometries[i] == nil)
+			return nil;
+	}
+
+	return geomlist;
+}
+
+rpGeometryList*
+GeometryListStreamRead2(RwStream *stream, rpGeometryList *geomlist)
+{
+	int i;
+	RwUInt32 version;
+
+	for(i = numberGeometrys; i < geomlist->numGeoms; i++){
+		if(!RwStreamFindChunk(stream, rwID_GEOMETRY, nil, &version))
+			return nil;
+		geomlist->geometries[i] = RpGeometryStreamRead(stream);
+		if(geomlist->geometries[i] == nil)
+			return nil;
+	}
+
+	return geomlist;
+}
+
+void
+GeometryListDeinitialize(rpGeometryList *geomlist)
+{
+	int i;
+
+	for(i = 0; i < geomlist->numGeoms; i++)
+		if(geomlist->geometries[i])
+			RpGeometryDestroy(geomlist->geometries[i]);
+
+	if(geomlist->numGeoms){
+		RwFree(geomlist->geometries);
+		geomlist->numGeoms = 0;
+	}
+}
+
+RpAtomic*
+ClumpAtomicStreamRead(RwStream *stream, rwFrameList *frmList, rpGeometryList *geomList)
+{
+	RwUInt32 size, version;
+	rpAtomicBinary a;
+	RpAtomic *atomic;
+
+	numberGeometrys = 0;
+	if(!RwStreamFindChunk(stream, rwID_STRUCT, &size, &version))
+		return nil;
+	assert(size <= sizeof(rpAtomicBinary));
+	if(RwStreamRead(stream, &a, size) != size)
+		return nil;
+
+	atomic = RpAtomicCreate();
+	if(atomic == nil)
+		return nil;
+
+	RpAtomicSetFlags(atomic, a.flags);
+
+	if(frmList->numFrames){
+		assert(a.frameIndex < frmList->numFrames);
+		RpAtomicSetFrame(atomic, frmList->frames[a.frameIndex]);
+	}
+
+	if(geomList->numGeoms){
+		assert(a.geomIndex < geomList->numGeoms);
+		RpAtomicSetGeometry(atomic, geomList->geometries[a.geomIndex], 0);
+	}else{
+		RpGeometry *geom;
+		if(!RwStreamFindChunk(stream, rwID_GEOMETRY, nil, &version)){
+			RpAtomicDestroy(atomic);
+			return nil;
+		}
+		geom = RpGeometryStreamRead(stream);
+		if(geom == nil){
+			RpAtomicDestroy(atomic);
+			return nil;
+		}
+		RpAtomicSetGeometry(atomic, geom, 0);
+		RpGeometryDestroy(geom);
+	}
+
+	return atomic;
+}
+
+bool
+RpClumpGtaStreamRead1(RwStream *stream)
+{
+	RwUInt32 size, version;
+
+	if(!RwStreamFindChunk(stream, rwID_STRUCT, &size, &version))
+		return false;
+	if(version >= 0x33000){
+		assert(size == 12);
+		if(RwStreamRead(stream, &gClumpInfo, 12) != 12)
+			return false;
+	}else{
+		assert(size == 4);
+		if(RwStreamRead(stream, &gClumpInfo, 4) != 4)
+			return false;
+	}
+
+	if(!RwStreamFindChunk(stream, rwID_FRAMELIST, nil, &version))
+		return false;
+	if(_rwFrameListStreamRead(stream, &gFrameList) == nil)
+		return false;
+
+	if(!RwStreamFindChunk(stream, rwID_GEOMETRYLIST, nil, &version)){
+		rwFrameListDeinitialize(&gFrameList);
+		return false;
+	}
+	if(GeometryListStreamRead1(stream, &gGeomList) == nil){
+		rwFrameListDeinitialize(&gFrameList);
+		return false;
+	}
+	streamPosition = stream->Type.memory.position;
+	return true;
+}
+
+RpClump*
+RpClumpGtaStreamRead2(RwStream *stream)
+{
+	int i;
+	RwUInt32 version;
+	RpAtomic *atomic;
+	RpClump *clump;
+
+	clump = RpClumpCreate();
+	if(clump == nil)
+		return nil;
+
+	RwStreamSkip(stream, streamPosition - stream->Type.memory.position);
+
+	if(GeometryListStreamRead2(stream, &gGeomList) == nil){
+		GeometryListDeinitialize(&gGeomList);
+		rwFrameListDeinitialize(&gFrameList);
+		RpClumpDestroy(clump);
+		return nil;
+	}
+
+	RpClumpSetFrame(clump, gFrameList.frames[0]);
+
+	for(i = 0; i < gClumpInfo.numAtomics; i++){
+		if(!RwStreamFindChunk(stream, rwID_ATOMIC, nil, &version)){
+			GeometryListDeinitialize(&gGeomList);
+			rwFrameListDeinitialize(&gFrameList);
+			RpClumpDestroy(clump);
+			return nil;
+		}
+
+		atomic = ClumpAtomicStreamRead(stream, &gFrameList, &gGeomList);
+		if(atomic == nil){
+			GeometryListDeinitialize(&gGeomList);
+			rwFrameListDeinitialize(&gFrameList);
+			RpClumpDestroy(clump);
+			return nil;
+		}
+
+		RpClumpAddAtomic(clump, atomic);
+	}
+
+	GeometryListDeinitialize(&gGeomList);
+	rwFrameListDeinitialize(&gFrameList);
+	return clump;
+}
+
+void
+RpClumpGtaCancelStream(void)
+{
+	GeometryListDeinitialize(&gGeomList);
+	rwFrameListDeinitialize(&gFrameList);
+	gFrameList.numFrames = 0;
+}
+
+STARTPATCHES
+	InjectHook(0x526060, RpClumpGtaStreamRead1, PATCH_JUMP);
+	InjectHook(0x526180, RpClumpGtaStreamRead2, PATCH_JUMP);
+	InjectHook(0x5262D0, RpClumpGtaCancelStream, PATCH_JUMP);
+ENDPATCHES
-- 
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