Test picking empty draws in mesh view

util/test/demos/d3d11/d3d11_mesh_zoo.cpp

@@ -183,6 +183,10 @@ float4 main(v2f IN) : SV_Target0
 
       ctx->Draw(1, 0);
 
+      ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
+      setMarker("Empty");
+      ctx->DrawInstanced(0, 0, 0, 0);
+
       Present();
     }
 

util/test/demos/d3d12/d3d12_mesh_zoo.cpp

@@ -197,6 +197,12 @@ float4 main(v2f IN) : SV_Target0
 
       cmd->DrawInstanced(1, 1, 0, 0);
 
+      cmd->SetPipelineState(pso);
+
+      setMarker(cmd, "Empty");
+
+      cmd->DrawInstanced(1, 0, 0, 0);
+
       FinishUsingBackbuffer(cmd, D3D12_RESOURCE_STATE_RENDER_TARGET);
 
       cmd->Close();

util/test/demos/gl/gl_mesh_zoo.cpp

@@ -331,6 +331,10 @@ void main()
       glBlitFramebuffer(0, 0, screenWidth, screenHeight, 0, 0, screenWidth, screenHeight,
                         GL_COLOR_BUFFER_BIT, GL_LINEAR);
 
+      setMarker("Empty");
+
+      glDrawArrays(GL_TRIANGLES, 0, 0);
+
       Present();
     }
 

util/test/demos/vk/vk_mesh_zoo.cpp

@@ -302,6 +302,10 @@ void main()
 
       vkCmdDraw(cmd, 1, 1, 0, 0);
 
+      vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, pipe);
+      setMarker(cmd, "Empty");
+      vkCmdDraw(cmd, 0, 0, 0, 0);
+
       vkCmdEndRenderPass(cmd);
 
       FinishUsingBackbuffer(cmd, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_GENERAL);

util/test/rdtest/shared/Mesh_Zoo.py

@@ -384,3 +384,16 @@ class Mesh_Zoo():
         self.check_vertex(105, 65, (rd.ReplayOutput.NoResult, rd.ReplayOutput.NoResult))
         self.check_vertex(115, 135, (rd.ReplayOutput.NoResult, rd.ReplayOutput.NoResult))
 
+        self.controller.SetFrameEvent(self.find_action("Empty").next.eventId, False)
+
+        self.cfg.position = self.controller.GetPostVSData(0, 0, self.cfg.type)
+        self.cfg.position.nearPlane = 1.0
+        self.cfg.position.farPlane = 100.0
+
+        self.cache_output()
+
+        self.check_vertex(105, 65, (rd.ReplayOutput.NoResult, rd.ReplayOutput.NoResult))
+        self.check_vertex(115, 135, (rd.ReplayOutput.NoResult, rd.ReplayOutput.NoResult))
+
+        rdtest.log.success("Picking in empty draw is as expected")
+