- read snapshots from zip.

src/resourcefiles/file_zip.cpp

@@ -306,17 +306,12 @@ FZipFile::~FZipFile()
 //
 //==========================================================================
 
-FCompressedBuffer FZipFile::GetRawLump(int lumpnum)
+FCompressedBuffer FZipLump::GetRawData()
 {
-	if ((unsigned)lumpnum >= NumLumps)
-	{
-		return{ 0,0,0,0,0,nullptr };
-	}
-	FZipLump *lmp = &Lumps[lumpnum];
-
-	FCompressedBuffer cbuf = { (unsigned)lmp->LumpSize, (unsigned)lmp->CompressedSize, lmp->Method, lmp->GPFlags, lmp->CRC32, new char[lmp->CompressedSize] };
-	Reader->Seek(lmp->Position, SEEK_SET);
-	Reader->Read(cbuf.mBuffer, lmp->CompressedSize);
+	FCompressedBuffer cbuf = { (unsigned)LumpSize, (unsigned)CompressedSize, Method, GPFlags, CRC32, new char[CompressedSize] };
+	if (Flags & LUMPFZIP_NEEDFILESTART) SetLumpAddress();
+	Owner->Reader->Seek(Position, SEEK_SET);
+	Owner->Reader->Read(cbuf.mBuffer, CompressedSize);
 	return cbuf;
 }
 

src/resourcefiles/file_zip.h

@@ -3,28 +3,6 @@
 
 #include "resourcefile.h"
 
-// This holds a compresed Zip entry with all needed info to decompress it.
-struct FCompressedBuffer
-{
-	unsigned mSize;
-	unsigned mCompressedSize;
-	int mMethod;
-	int mZipFlags;
-	unsigned mCRC32;
-	char *mBuffer;
-	
-	bool Decompress(char *destbuffer);
-	void Clean()
-	{
-		mSize = mCompressedSize = 0;
-		if (mBuffer != nullptr)
-		{
-			delete[] mBuffer;
-			mBuffer = nullptr;
-		}
-	}
-};
-
 enum
 {
 	LUMPFZIP_NEEDFILESTART = 128
@@ -50,6 +28,7 @@ struct FZipLump : public FResourceLump
 private:
 	void SetLumpAddress();
 	virtual int GetFileOffset();
+	FCompressedBuffer GetRawData();
 };
 
 
@@ -68,7 +47,6 @@ public:
 	virtual ~FZipFile();
 	bool Open(bool quiet);
 	virtual FResourceLump *GetLump(int no) { return ((unsigned)no < NumLumps)? &Lumps[no] : NULL; }
-	FCompressedBuffer GetRawLump(int lumpnum);
 };
 
 

src/resourcefiles/resourcefile.cpp

@@ -40,6 +40,7 @@
 #include "doomerrors.h"
 #include "gi.h"
 #include "doomstat.h"
+#include "w_zip.h"
 
 
 //==========================================================================
@@ -191,6 +192,23 @@ void FResourceLump::CheckEmbedded()
 }
 
 
+//==========================================================================
+//
+// this is just for completeness. For non-Zips only an uncompressed lump can
+// be returned.
+//
+//==========================================================================
+
+FCompressedBuffer FResourceLump::GetRawData()
+{
+	FCompressedBuffer cbuf = { (unsigned)LumpSize, (unsigned)LumpSize, METHOD_STORED, 0, 0, new char[LumpSize] };
+	memcpy(cbuf.mBuffer, CacheLump(), LumpSize);
+	cbuf.mCRC32 = crc32(0, (BYTE*)cbuf.mBuffer, LumpSize);
+	ReleaseCache();
+	return cbuf;
+}
+
+
 //==========================================================================
 //
 // Returns the owner's FileReader if it can be used to access this lump

src/resourcefiles/resourcefile.h

@@ -8,6 +8,28 @@
 class FResourceFile;
 class FTexture;
 
+// This holds a compresed Zip entry with all needed info to decompress it.
+struct FCompressedBuffer
+{
+	unsigned mSize;
+	unsigned mCompressedSize;
+	int mMethod;
+	int mZipFlags;
+	unsigned mCRC32;
+	char *mBuffer;
+
+	bool Decompress(char *destbuffer);
+	void Clean()
+	{
+		mSize = mCompressedSize = 0;
+		if (mBuffer != nullptr)
+		{
+			delete[] mBuffer;
+			mBuffer = nullptr;
+		}
+	}
+};
+
 struct FResourceLump
 {
 	friend class FResourceFile;
@@ -46,6 +68,7 @@ struct FResourceLump
 	virtual int GetIndexNum() const { return 0; }
 	void LumpNameSetup(FString iname);
 	void CheckEmbedded();
+	virtual FCompressedBuffer GetRawData();
 
 	void *CacheLump();
 	int ReleaseCache();