[dxvk] Add methods to check which dynamic states a pipeline uses

src/dxvk/dxvk_graphics.h

@@ -27,7 +27,7 @@ namespace dxvk {
 
   using DxvkGraphicsPipelineFlags = Flags<DxvkGraphicsPipelineFlag>;
 
-  
+
   /**
    * \brief Graphics pipeline state info
    * 
@@ -46,6 +46,28 @@ namespace dxvk {
     
     bool operator == (const DxvkGraphicsPipelineStateInfo& other) const;
     bool operator != (const DxvkGraphicsPipelineStateInfo& other) const;
+
+    bool useDynamicStencilRef() const {
+      return dsEnableStencilTest;
+    }
+
+    bool useDynamicDepthBias() const {
+      return rsDepthBiasEnable;
+    }
+
+    bool useDynamicBlendConstants() const {
+      bool result = false;
+      
+      for (uint32_t i = 0; i < MaxNumRenderTargets && !result; i++) {
+        result |= omBlendAttachments[i].blendEnable
+         && (util::isBlendConstantBlendFactor(omBlendAttachments[i].srcColorBlendFactor)
+          || util::isBlendConstantBlendFactor(omBlendAttachments[i].dstColorBlendFactor)
+          || util::isBlendConstantBlendFactor(omBlendAttachments[i].srcAlphaBlendFactor)
+          || util::isBlendConstantBlendFactor(omBlendAttachments[i].dstAlphaBlendFactor));
+      }
+
+      return result;
+    }
     
     DxvkBindingMask                     bsBindingMask;
     

src/dxvk/dxvk_util.cpp

@@ -150,6 +150,14 @@ namespace dxvk::util {
   }
 
 
+  bool isBlendConstantBlendFactor(VkBlendFactor factor) {
+    return factor == VK_BLEND_FACTOR_CONSTANT_COLOR
+        || factor == VK_BLEND_FACTOR_CONSTANT_ALPHA
+        || factor == VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR
+        || factor == VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA;
+  }
+
+
   bool isDualSourceBlendFactor(VkBlendFactor factor) {
     return factor == VK_BLEND_FACTOR_SRC1_COLOR
         || factor == VK_BLEND_FACTOR_SRC1_ALPHA

src/dxvk/dxvk_util.h

@@ -212,6 +212,9 @@ namespace dxvk::util {
           VkComponentSwizzle          component,
           uint32_t                    identity);
   
+  bool isBlendConstantBlendFactor(
+          VkBlendFactor               factor);
+  
   bool isDualSourceBlendFactor(
           VkBlendFactor               factor);