From d6f69e14dc555cd410fa69d88ffbe9953cb33f16 Mon Sep 17 00:00:00 2001
From: CamilleLaVey <camillelavey99@gmail.com>
Date: Sat, 26 Sep 2026 14:59:01 -0400
Subject: [PATCH] experiment with depth ranges

---
 src/video_core/renderer_vulkan/vk_rasterizer.cpp | 10 +++++++++-
 src/video_core/renderer_vulkan/vk_rasterizer.h   |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.cpp b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
index 37b8774f18..ec30f2fa84 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.cpp
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
@@ -1299,10 +1299,18 @@ void RasterizerVulkan::UpdateScissorsState(Tegra::Engines::Maxwell3D::Regs& regs
 }
 
 void RasterizerVulkan::UpdateDepthBias(Tegra::Engines::Maxwell3D::Regs& regs) {
-    if (!state_tracker.TouchDepthBias()) {
+    const bool zeta_changed =
+        std::exchange(depth_bias_zeta_format, regs.zeta.format) != regs.zeta.format;
+    const bool bias_changed = state_tracker.TouchDepthBias();
+    if (!bias_changed && !zeta_changed) {
         return;
     }
     float units = regs.depth_bias / 2.0f;
+    const bool is_float = regs.zeta.format == Tegra::DepthFormat::Z32_FLOAT ||
+                          regs.zeta.format == Tegra::DepthFormat::Z32_FLOAT_X24S8_UINT;
+    if (is_float && !device.IsExtDepthBiasControlSupported()) {
+        units *= 256.0f;
+    }
     const bool is_d24 = regs.zeta.format == Tegra::DepthFormat::Z24_UNORM_S8_UINT ||
                         regs.zeta.format == Tegra::DepthFormat::X8Z24_UNORM ||
                         regs.zeta.format == Tegra::DepthFormat::S8Z24_UNORM ||
diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.h b/src/video_core/renderer_vulkan/vk_rasterizer.h
index 2c45c6c081..e1f14cdbf3 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.h
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.h
@@ -225,6 +225,7 @@ private:
     boost::container::static_vector<VkSampler, MAX_TEXTURES> sampler_handles;
 
     u32 draw_counter = 0;
+    Tegra::DepthFormat depth_bias_zeta_format{};
 };
 
 } // namespace Vulkan