brought back functionality from previous builds but now cross-platform

engine/rendering.cpp

@@ -0,0 +1,43 @@
+#include "rendering.h"
+
+CUtlVector<RenderingStep_t> g_StepPrepass;
+CUtlVector<RenderingStep_t> g_StepMeshRendering;
+CUtlVector<RenderingStep_t> g_StepShading;
+CUtlVector<RenderingStep_t> g_StepPostProcessing;
+CUtlVector<RenderingStep_t> g_StepUI;
+
+CRenderingStep::CRenderingStep()
+{
+
+}
+
+CRenderingStep::CRenderingStep(const char *szStepName, CreateRenderStepFn pfn)
+{
+
+}
+	
+CPrepassRenderingStep::CPrepassRenderingStep(const char *szStepName, CreateRenderStepFn pfn)
+{
+	g_StepPrepass.AppendTail({pfn(), szStepName});
+}
+
+CMeshRenderingStep::CMeshRenderingStep(const char *szStepName, CreateRenderStepFn pfn)
+{
+	g_StepMeshRendering.AppendTail({pfn(), szStepName});
+}
+
+CShadingRenderingStep::CShadingRenderingStep(const char *szStepName, CreateRenderStepFn pfn)
+{
+	g_StepShading.AppendTail({pfn(), szStepName});
+}
+
+CPostProcessingRenderingStep::CPostProcessingRenderingStep(const char *szStepName, CreateRenderStepFn pfn)
+{
+	g_StepPostProcessing.AppendTail({pfn(), szStepName});
+}
+
+CUIRenderingStep::CUIRenderingStep(const char *szStepName, CreateRenderStepFn pfn)
+{
+	g_StepUI.AppendTail({pfn(), szStepName});
+}
+