Add support for Geometry Shaders on Vulkan

#136

Source/Engine/Renderer/DepthOfFieldPass.cpp

@@ -39,6 +39,7 @@ bool DepthOfFieldPass::Init()
     _platformSupportsBokeh = _platformSupportsDoF && limits.HasGeometryShaders && limits.HasDrawIndirect && limits.HasAppendConsumeBuffers;
 
     _platformSupportsBokeh &= GPUDevice::Instance->GetRendererType() != RendererType::DirectX12; // TODO: fix bokeh crash on d3d12 (driver issue probably - started to happen recently)
+    _platformSupportsBokeh &= GPUDevice::Instance->GetRendererType() != RendererType::Vulkan; // TODO: add bokeh on Vulkan (draw indirect with UA output from PS)
 
     // Create pipeline states
     if (_platformSupportsDoF)

Source/Shaders/ColorGrading.shader

@@ -259,6 +259,9 @@ META_VS_IN_ELEMENT(TEXCOORD, 0, R32G32_FLOAT, 0, ALIGN, PER_VERTEX, 0, true)
 Quad_VS2GS VS_WriteToSlice(float2 position : POSITION0, float2 texCoord : TEXCOORD0, uint layerIndex : SV_InstanceID)
 {
 	Quad_VS2GS output;
+#if VULKAN
+	position.y = position.y * -1.0f;
+#endif
 	output.Vertex.Position = float4(position, 0, 1);
 	output.Vertex.TexCoord = texCoord;
 	output.LayerIndex = layerIndex;