Adding software rendering plugin. This is aimed at accurate emulation, not fast. Its more like a debugging tool than actually useful.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4407 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoSoftware/Src/XFMemLoader.cpp

@@ -0,0 +1,73 @@
+// Copyright (C) 2003-2009 Dolphin Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official SVN repository and contact information can be found at
+// http://code.google.com/p/dolphin-emu/
+
+#include "../../../Core/VideoCommon/Src/VideoCommon.h"
+
+#include "XFMemLoader.h"
+#include "CPMemLoader.h"
+#include "Clipper.h"
+
+
+XFRegisters xfregs;
+
+void InitXFMemory()
+{
+    memset(&xfregs, 0, sizeof(xfregs));
+}
+
+void XFWritten(u32 transferSize, u32 baseAddress)
+{
+    u32 topAddress = baseAddress + transferSize;
+
+    if (baseAddress <= 0x1026 && topAddress >= 0x1020)
+        Clipper::SetViewOffset();
+}
+
+void LoadXFReg(u32 transferSize, u32 baseAddress, u32 *pData)
+{
+    u32 size = transferSize;
+
+    // do not allow writes past registers
+    if (baseAddress + transferSize > 0x1058)
+    {
+        INFO_LOG(VIDEO, "xf load exceeds address space: %x %d bytes\n", baseAddress, transferSize);
+
+        if (baseAddress >= 0x1058)
+            size = 0;
+        else
+            size = 0x1058 - baseAddress;
+    }
+
+    if (size > 0) {
+        memcpy_gc( &((u32*)&xfregs)[baseAddress], pData, size * 4);
+        XFWritten(transferSize, baseAddress);
+    }
+
+}
+
+void LoadIndexedXF(u32 val, int array)
+{
+    int index = val >> 16;
+    int address = val & 0xFFF; //check mask
+    int size = ((val >> 12) & 0xF) + 1;
+    //load stuff from array to address in xf mem
+
+    u32* xfmem = (u32*)&xfregs;
+
+    for (int i = 0; i < size; i++)
+        xfmem[address + i] = Memory_Read_U32(arraybases[array] + arraystrides[array]*index + i*4);
+}