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/RwTexRead.cpp | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 src/RwTexRead.cpp

(limited to 'src/RwTexRead.cpp')

diff --git a/src/RwTexRead.cpp b/src/RwTexRead.cpp
new file mode 100644
index 00000000..a1a7050a
--- /dev/null
+++ b/src/RwTexRead.cpp
@@ -0,0 +1,126 @@
+#include "common.h"
+#include "patcher.h"
+
+RwTexture*
+RwTextureGtaStreamRead(RwStream *stream)
+{
+	RwUInt32 size, version;
+	RwTexture *tex;
+
+	if(!RwStreamFindChunk(stream, rwID_TEXTURENATIVE, &size, &version))
+		return nil;
+
+	// TODO: unused timing
+
+	if(!RWSRCGLOBAL(stdFunc[rwSTANDARDNATIVETEXTUREREAD](stream, &tex, size)))
+		return nil;
+ 
+	return tex;
+}
+
+RwTexture*
+destroyTexture(RwTexture *texture, void *data)
+{
+	RwTextureDestroy(texture);
+	return texture;
+}
+
+RwTexDictionary*
+RwTexDictionaryGtaStreamRead(RwStream *stream)
+{
+	RwUInt32 size, version;
+	RwInt32 numTextures;
+	RwTexDictionary *texDict;
+	RwTexture *tex;
+
+	if(!RwStreamFindChunk(stream, rwID_STRUCT, &size, &version))
+		return nil;
+	assert(size == 4);
+	if(RwStreamRead(stream, &numTextures, size) != size)
+		return nil;
+
+	texDict = RwTexDictionaryCreate();
+	if(texDict == nil)
+		return nil;
+
+	while(numTextures--){
+		tex = RwTextureGtaStreamRead(stream);
+		if(tex == nil){
+			RwTexDictionaryForAllTextures(texDict, destroyTexture, nil);
+			RwTexDictionaryDestroy(texDict);
+			return nil;
+		}
+		RwTexDictionaryAddTexture(texDict, tex);
+	}
+
+	return texDict;
+}
+
+static int32 numberTextures = -1;
+static int32 streamPosition;
+
+RwTexDictionary*
+RwTexDictionaryGtaStreamRead1(RwStream *stream)
+{
+	RwUInt32 size, version;
+	RwInt32 numTextures;
+	RwTexDictionary *texDict;
+	RwTexture *tex;
+
+	numberTextures = 0;
+	if(!RwStreamFindChunk(stream, rwID_STRUCT, &size, &version))
+		return nil;
+	assert(size == 4);
+	if(RwStreamRead(stream, &numTextures, size) != size)
+		return nil;
+
+	texDict = RwTexDictionaryCreate();
+	if(texDict == nil)
+		return nil;
+
+	numberTextures = numTextures/2;
+
+	while(numTextures > numberTextures){
+		numTextures--;
+
+		tex = RwTextureGtaStreamRead(stream);
+		if(tex == nil){
+			RwTexDictionaryForAllTextures(texDict, destroyTexture, nil);
+			RwTexDictionaryDestroy(texDict);
+			return nil;
+		}
+		RwTexDictionaryAddTexture(texDict, tex);
+	}
+
+	numberTextures = numTextures;
+	streamPosition = stream->Type.memory.position;
+
+	return texDict;
+}
+
+RwTexDictionary*
+RwTexDictionaryGtaStreamRead2(RwStream *stream, RwTexDictionary *texDict)
+{
+	RwTexture *tex;
+
+	RwStreamSkip(stream, streamPosition - stream->Type.memory.position);
+
+	while(numberTextures--){
+		tex = RwTextureGtaStreamRead(stream);
+		if(tex == nil){
+			RwTexDictionaryForAllTextures(texDict, destroyTexture, nil);
+			RwTexDictionaryDestroy(texDict);
+			return nil;
+		}
+		RwTexDictionaryAddTexture(texDict, tex);
+	}
+
+	return texDict;
+}
+
+STARTPATCHES
+	InjectHook(0x592380, RwTextureGtaStreamRead, PATCH_JUMP);
+	InjectHook(0x5924A0, RwTexDictionaryGtaStreamRead, PATCH_JUMP);
+	InjectHook(0x592550, RwTexDictionaryGtaStreamRead1, PATCH_JUMP);
+	InjectHook(0x592650, RwTexDictionaryGtaStreamRead2, PATCH_JUMP);
+ENDPATCHES
-- 
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