Fix stability on exit or when doing heavy resources streaming stress tests

Source/Engine/Graphics/Materials/MaterialShader.cpp

@@ -64,7 +64,7 @@ MaterialShader::MaterialShader(const StringView& name)
 
 MaterialShader::~MaterialShader()
 {
-    ASSERT(!_isLoaded);
+    ASSERT(!_isLoaded && _shader);
     SAFE_DELETE_GPU_RESOURCE(_shader);
 }
 

Source/Engine/GraphicsDevice/DirectX/DX11/GPUContextDX11.cpp

@@ -118,7 +118,7 @@ void GPUContextDX11::FrameBegin()
     _context->VSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
     _context->DSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
     _context->PSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
-    _context->CSSetSamplers(0, ARRAY_COUNT(samplers), samplers); // TODO: maybe we don't want to bind those static sampler always?
+    _context->CSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
 }
 
 #if GPU_ALLOW_PROFILE_EVENTS
@@ -637,7 +637,20 @@ void GPUContextDX11::ClearState()
 
     FlushState();
 
-    //_context->ClearState();
+    _context->ClearState();
+    ID3D11SamplerState* samplers[] =
+    {
+        _device->_samplerLinearClamp,
+        _device->_samplerPointClamp,
+        _device->_samplerLinearWrap,
+        _device->_samplerPointWrap,
+        _device->_samplerShadow,
+        _device->_samplerShadowPCF
+    };
+    _context->VSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
+    _context->DSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
+    _context->PSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
+    _context->CSSetSamplers(0, ARRAY_COUNT(samplers), samplers);
 }
 
 void GPUContextDX11::FlushState()

Source/Engine/Render2D/Font.cpp

@@ -440,5 +440,5 @@ void Font::FlushFaceSize() const
 
 String Font::ToString() const
 {
-    return String::Format(TEXT("Font {0} {1}"), _asset->GetFamilyName(), _size);
+    return String::Format(TEXT("Font {0} {1}"), _asset ? _asset->GetFamilyName() : String::Empty, _size);
 }