dedicated server nulltexturemanager work

also supress warning for imageassets not loading a texture in nulldevice, and early out of _determineFeatures shadergen methods under the same conditions

Engine/source/T3D/assets/ImageAsset.h

@@ -48,6 +48,8 @@
 
 #include <string>
 #include "assetMacroHelpers.h"
+
+#include "gfx/gfxDevice.h"
 //-----------------------------------------------------------------------------
 class ImageAsset : public AssetBase
 {
@@ -250,7 +252,8 @@ public: \
       }\
       else if (!m##name)\
       {\
-         Con::errorf("%s(%s)::_set%s() - Couldn't load image \"%s\"", macroText(className), getName(), macroText(name), _in);\
+         if (GFX->getAdapterType() != NullDevice)\
+            Con::errorf("%s(%s)::_set%s() - Couldn't load image \"%s\"", macroText(className), getName(), macroText(name), _in);\
          return false;\
       }\
       return true;\
@@ -392,7 +395,8 @@ public: \
       }\
       else if (!m##name[index])\
       {\
-         Con::errorf("%s(%s)::_set%s(%i) - Couldn't load image \"%s\"", macroText(className), getName(), macroText(name), index, _in);\
+         if (GFX->getAdapterType() != NullDevice)\
+            Con::errorf("%s(%s)::_set%s(%i) - Couldn't load image \"%s\"", macroText(className), getName(), macroText(name), index, _in);\
          return false; \
       }\
       return true;\

Engine/source/gfx/Null/gfxNullDevice.cpp

@@ -87,8 +87,16 @@ GFXNullTextureObject::GFXNullTextureObject(GFXDevice * aDevice, GFXTextureProfil
 
 class GFXNullTextureManager : public GFXTextureManager
 {
+public:
+   GFXTextureObject* createTexture(GBitmap* bmp, const String& resourceName, GFXTextureProfile* profile, bool deleteBmp) { return nullptr; } // _createNullTextureObject();}
+   GFXTextureObject* createTexture(DDSFile* dds, GFXTextureProfile* profile, bool deleteDDS) { return nullptr; }
+   GFXTextureObject* createTexture(const Torque::Path& path, GFXTextureProfile* profile) { return nullptr; }
+   GFXTextureObject* createTexture(U32 width, U32 height, void* pixels, GFXFormat format, GFXTextureProfile* profile) { return nullptr; }
+   GFXTextureObject* createTexture(U32 width, U32 height, U32 depth, GFXFormat format, GFXTextureProfile* profile, U32 numMipLevels = 1) { return nullptr; }
+   GFXTextureObject* createTexture(U32 width, U32 height, GFXFormat format, GFXTextureProfile* profile, U32 numMipLevels, S32 antialiasLevel) { return nullptr; }
+   GFXTextureObject* createCompositeTexture(GBitmap* bmp[4], U32 inputKey[4], const String& resourceName, GFXTextureProfile* profile, bool deleteBmp) { return nullptr; }
 protected:
-      virtual GFXTextureObject *_createTextureObject( U32 height, 
+      GFXTextureObject *_createTextureObject( U32 height, 
                                                       U32 width, 
                                                       U32 depth, 
                                                       GFXFormat format, 

Engine/source/materials/processedShaderMaterial.cpp

@@ -295,6 +295,7 @@ void ProcessedShaderMaterial::_determineFeatures(  U32 stageNum,
                                                    MaterialFeatureData &fd, 
                                                    const FeatureSet &features )
 {
+   if (GFX->getAdapterType() == NullDevice) return;
    PROFILE_SCOPE( ProcessedShaderMaterial_DetermineFeatures );
 
    const F32 shaderVersion = GFX->getPixelShaderVersion();

Engine/source/renderInstance/renderDeferredMgr.cpp

@@ -593,6 +593,7 @@ void ProcessedDeferredMaterial::_determineFeatures( U32 stageNum,
                                                    MaterialFeatureData &fd,
                                                    const FeatureSet &features )
 {
+   if (GFX->getAdapterType() == NullDevice) return;
    Parent::_determineFeatures( stageNum, fd, features );
    if (fd.features.hasFeature(MFT_ForwardShading))
       return;