[TEST] Loggins for depth floats vs missing/ unsupported DepthBiasControl

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -1255,6 +1255,20 @@ void RasterizerVulkan::UpdateDepthBias(Tegra::Engines::Maxwell3D::Regs& regs) {
         }
     }
 
+    const bool is_float_depth =
+        regs.zeta.format == Tegra::DepthFormat::Z32_FLOAT ||
+        regs.zeta.format == Tegra::DepthFormat::Z32_FLOAT_X24S8_UINT ||
+        regs.zeta.format == Tegra::DepthFormat::Z32_FLOAT_X16V8X8_UINT ||
+        regs.zeta.format == Tegra::DepthFormat::Z32_FLOAT_X16V8S8_UINT;
+    if (is_float_depth && units != 0.0f && !device.IsExtDepthBiasControlSupported()) {
+        static bool logged_float_bias_warning = false;
+        if (!logged_float_bias_warning) {
+            logged_float_bias_warning = true;
+            LOG_WARNING(Render_Vulkan,
+                        "Depth bias on a float depth target without VK_EXT_depth_bias_control");
+        }
+    }
+
     scheduler.Record([constant = units, clamp = regs.depth_bias_clamp,
                       factor = regs.slope_scale_depth_bias, this](vk::CommandBuffer cmdbuf) {
         if (device.IsExtDepthBiasControlSupported()) {