Metal: drop uneeded Discard and Staging buffer stubs

Author: paroj

RenderSystems/Metal/include/OgreMetalDiscardBufferManager.h

@@ -46,15 +46,13 @@ namespace Ogre
     private:
         id<MTLBuffer>       mBuffer;
         MetalDevice         *mDevice;
-        MetalDiscardBuffer  *mDiscardBuffer;
-        StagingBuffer       *mStagingBuffer;
         uint32              mLastFrameUsed;
         uint32              mLastFrameGpuWrote;
 
         StagingBuffer* createStagingBuffer( size_t sizeBytes, bool forUpload );
     public:
         MetalHardwareBufferCommon(size_t sizeBytes, Usage usage, bool useShadowBuffer, uint16 alignment,
-                                  MetalDiscardBufferManager* discardBufferManager, MetalDevice* device);
+                                  MetalDevice* device);
         virtual ~MetalHardwareBufferCommon();
 
         void _notifyDeviceStalled(void);
@@ -68,7 +66,6 @@ namespace Ogre
             The MTLBuffer in question.
         */
         id<MTLBuffer> getBufferName( size_t &outOffset );
-        id<MTLBuffer> getBufferNameForGpuWrite(void);
 
         void* lockImpl(size_t offset, size_t length, LockOptions options) override;
         void unlockImpl() override;

RenderSystems/Metal/include/OgreMetalHardwareBufferCommon.h

@@ -37,8 +37,7 @@ namespace Ogre {
     class _OgreMetalExport MetalHardwareBufferManager : public HardwareBufferManager
     {
     protected:
-        MetalDiscardBufferManager *mDiscardBufferManager;
-
+        MetalDevice *mDevice;
         OGRE_MUTEX(mIndexBuffersMutex);
         IndexBufferList mIndexBuffers;
     public:
@@ -47,8 +46,6 @@ namespace Ogre {
 
         void _notifyDeviceStalled(void);
 
-        MetalDiscardBufferManager* _getDiscardBufferManager(void)   { return mDiscardBufferManager; }
-
         /// Creates a vertex buffer
         virtual HardwareVertexBufferSharedPtr createVertexBuffer( size_t vertexSize, size_t numVerts,
                                                                   HardwareBuffer::Usage usage,

RenderSystems/Metal/include/OgreMetalHardwareBufferManager.h

@@ -131,7 +131,6 @@ namespace Ogre
         /// Flag indicating if shader object successfully compiled
         bool mCompiled;
         /// Preprocessor options
-        String mEntryPoint;
         String mTargetBufferName;
 
         std::vector<GpuConstantDefinition> mConstantDefsSorted;

RenderSystems/Metal/include/OgreMetalProgram.h

@@ -53,7 +53,6 @@ namespace Ogre
         GpuProgram* create(ResourceManager* creator,
             const String& name, ResourceHandle handle,
             const String& group, bool isManual, ManualResourceLoader* loader);
-        void destroy(GpuProgram* prog);
     };
 }