D3D11: Fixed invalid blend state cache hash value.

src/renderer_d3d.h

@@ -104,6 +104,10 @@ namespace bgfx
 		{
 			invalidate(_key);
 			m_hashMap.insert(stl::make_pair(_key, _value) );
+			BX_CHECK(1 == getRefCount(_value), "Interface ref count %d, hash %" PRIx64 "."
+				, getRefCount(_value)
+				, _key
+				);
 		}
 
 		Ty* find(uint64_t _key)

src/renderer_d3d11.cpp

@@ -2485,31 +2485,7 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 		{
 			_state &= BGFX_D3D11_BLEND_STATE_MASK;
 
-			bx::HashMurmur2A murmur;
-			murmur.begin();
-			murmur.add(_state);
-
-			const uint64_t f0 = BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_FACTOR, BGFX_STATE_BLEND_FACTOR);
-			const uint64_t f1 = BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_INV_FACTOR, BGFX_STATE_BLEND_INV_FACTOR);
-			bool hasFactor = f0 == (_state & f0)
-				|| f1 == (_state & f1)
-				;
-
-			float blendFactor[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
-			if (hasFactor)
-			{
-				blendFactor[0] = ( (_rgba>>24)     )/255.0f;
-				blendFactor[1] = ( (_rgba>>16)&0xff)/255.0f;
-				blendFactor[2] = ( (_rgba>> 8)&0xff)/255.0f;
-				blendFactor[3] = ( (_rgba    )&0xff)/255.0f;
-			}
-			else
-			{
-				murmur.add(_rgba);
-			}
-
-			uint32_t hash = murmur.end();
-
+			const uint64_t hash = _state;
 			ID3D11BlendState* bs = m_blendStateCache.find(hash);
 			if (NULL == bs)
 			{
@@ -2587,6 +2563,22 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 				m_blendStateCache.add(hash, bs);
 			}
 
+			const uint64_t f0 = BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_FACTOR, BGFX_STATE_BLEND_FACTOR);
+			const uint64_t f1 = BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_INV_FACTOR, BGFX_STATE_BLEND_INV_FACTOR);
+			bool hasFactor = false
+				|| f0 == (_state & f0)
+				|| f1 == (_state & f1)
+				;
+
+			float blendFactor[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
+			if (hasFactor)
+			{
+				blendFactor[0] = ( (_rgba>>24)     )/255.0f;
+				blendFactor[1] = ( (_rgba>>16)&0xff)/255.0f;
+				blendFactor[2] = ( (_rgba>> 8)&0xff)/255.0f;
+				blendFactor[3] = ( (_rgba    )&0xff)/255.0f;
+			}
+
 			m_deviceCtx->OMSetBlendState(bs, blendFactor, 0xffffffff);
 		}