consolidate dx8 includes

panda/src/dxgsg8/dxGraphicsStateGuardian8.cxx

@@ -60,8 +60,8 @@
 #include "dxIndexBufferContext8.h"
 #include "pStatTimer.h"
 #include "pStatCollector.h"
+#include "dxgsg8base.h"
 
-#include <d3dx8.h>
 #include <mmsystem.h>
 
 TypeHandle DXGraphicsStateGuardian8::_type_handle;

panda/src/dxgsg8/dxIndexBufferContext8.cxx

@@ -21,7 +21,7 @@
 #include "config_dxgsg8.h"
 #include "graphicsStateGuardian.h"
 #include "pStatTimer.h"
-#include <d3dx8.h>
+#include "dxgsg8base.h"
 
 TypeHandle DXIndexBufferContext8::_type_handle;
 

panda/src/dxgsg8/dxTextureContext8.cxx

@@ -20,7 +20,8 @@
 #include "config_dxgsg8.h"
 #include "dxGraphicsStateGuardian8.h"
 #include "pStatTimer.h"
-#include <d3dx8tex.h>
+#include "dxgsg8base.h"
+
 #include <assert.h>
 #include <time.h>
 

panda/src/dxgsg8/dxVertexBufferContext8.cxx

@@ -23,7 +23,7 @@
 #include "pStatTimer.h"
 #include "internalName.h"
 #include "config_dxgsg8.h"
-#include <d3dx8.h>
+#include "dxgsg8base.h"
 
 TypeHandle DXVertexBufferContext8::_type_handle;
 

panda/src/dxgsg8/dxgsg8base.h

@@ -29,26 +29,14 @@
 #define STRICT
 #endif
 
+#define DIRECT3D_VERSION 0x0800
 #include <windows.h>
-
-#define D3D_OVERLOADS   //  get D3DVECTOR '+' operator, etc from d3dtypes.h
 #include <d3d8.h>
 #include <d3dx8.h>
 #include <dxerr8.h>
+#include <d3dx8tex.h>
 #undef WIN32_LEAN_AND_MEAN
 
-#if D3D_SDK_VERSION != 220
-#error you have DX 8.0 headers, not DX 8.1, you need to install DX 8.1 SDK!
-#endif
-
-#if DIRECT3D_VERSION != 0x0800
-#error DX8.1 headers not available, you need to install newer MS Platform SDK!
-#endif
-
-#ifndef D3DCAPS3_ALPHA_FULLSCREEN_FLIP_OR_DISCARD
-#error you have pre-release DX8.1 headers, you need to install final DX 8.1 SDK!
-#endif
-
 #ifndef D3DERRORSTRING
 #ifdef NDEBUG
 #define D3DERRORSTRING(HRESULT) " at (" << __FILE__ << ":" << __LINE__ << "), hr=" <<  DXGetErrorString8(HRESULT) << endl  // leave out descriptions to shrink release build