[dxvk] Dirty multisample state if sample mask export changes.

This affects Alpha-to-Coverage.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/dxvk/dxvk_context.cpp b/src/dxvk/dxvk_context.cpp
index 31e15e28..9c9ca14a 100644
--- a/src/dxvk/dxvk_context.cpp
+++ b/src/dxvk/dxvk_context.cpp
@@ -4961,6 +4961,7 @@ namespace dxvk {
 
     DxvkGraphicsPipelineFlags oldFlags = m_state.gp.flags;
     DxvkGraphicsPipelineFlags newFlags = newPipeline->flags();
+    DxvkGraphicsPipelineFlags diffFlags = oldFlags ^ newFlags;
 
     DxvkGraphicsPipelineFlags hazardMask(
       DxvkGraphicsPipelineFlag::HasTransformFeedback,
@@ -4968,7 +4969,7 @@ namespace dxvk {
 
     m_state.gp.flags = newFlags;
 
-    if (((oldFlags ^ newFlags) & hazardMask) != 0) {
+    if ((diffFlags & hazardMask) != 0) {
       // Force-update vertex/index buffers for hazard checks
       m_flags.set(DxvkContextFlag::GpDirtyIndexBuffer,
                   DxvkContextFlag::GpDirtyVertexBuffers,
@@ -4981,6 +4982,9 @@ namespace dxvk {
         this->spillRenderPass(true);
     }
 
+    if (diffFlags.test(DxvkGraphicsPipelineFlag::HasSampleMaskExport))
+      m_flags.set(DxvkContextFlag::GpDirtyMultisampleState);
+
     m_descriptorState.dirtyStages(VK_SHADER_STAGE_ALL_GRAPHICS);
 
     if (newPipeline->getBindings()->layout().getPushConstantRange().size)