Merge pull request #3807 from ReinUsesLisp/fix-depth-clamp

maxwell_3d: Fix depth clamping register

src/video_core/engines/maxwell_3d.h

@@ -1179,6 +1179,7 @@ public:
                     BitField<0, 1, u32> depth_range_0_1;
                     BitField<3, 1, u32> depth_clamp_near;
                     BitField<4, 1, u32> depth_clamp_far;
+                    BitField<11, 1, u32> depth_clamp_disabled;
                 } view_volume_clip_control;
 
                 INSERT_UNION_PADDING_WORDS(0x1F);

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -1022,11 +1022,7 @@ void RasterizerOpenGL::SyncDepthClamp() {
     }
     flags[Dirty::DepthClampEnabled] = false;
 
-    const auto& state = gpu.regs.view_volume_clip_control;
-    UNIMPLEMENTED_IF_MSG(state.depth_clamp_far != state.depth_clamp_near,
-                         "Unimplemented depth clamp separation!");
-
-    oglEnable(GL_DEPTH_CLAMP, state.depth_clamp_far || state.depth_clamp_near);
+    oglEnable(GL_DEPTH_CLAMP, gpu.regs.view_volume_clip_control.depth_clamp_disabled == 0);
 }
 
 void RasterizerOpenGL::SyncClipEnabled(u32 clip_mask) {

src/video_core/renderer_vulkan/fixed_pipeline_state.cpp

@@ -81,7 +81,7 @@ void FixedPipelineState::Rasterizer::Fill(const Maxwell& regs) noexcept {
     primitive_restart_enable.Assign(regs.primitive_restart.enabled != 0 ? 1 : 0);
     cull_enable.Assign(regs.cull_test_enabled != 0 ? 1 : 0);
     depth_bias_enable.Assign(enabled_lut[POLYGON_OFFSET_ENABLE_LUT[topology_index]] != 0 ? 1 : 0);
-    depth_clamp_enable.Assign(clip.depth_clamp_near == 1 || clip.depth_clamp_far == 1 ? 1 : 0);
+    depth_clamp_disabled.Assign(regs.view_volume_clip_control.depth_clamp_disabled.Value());
     ndc_minus_one_to_one.Assign(regs.depth_mode == Maxwell::DepthMode::MinusOneToOne ? 1 : 0);
     cull_face.Assign(PackCullFace(regs.cull_face));
     front_face.Assign(packed_front_face);

src/video_core/renderer_vulkan/fixed_pipeline_state.h

@@ -153,7 +153,7 @@ struct FixedPipelineState {
             BitField<4, 1, u32> primitive_restart_enable;
             BitField<5, 1, u32> cull_enable;
             BitField<6, 1, u32> depth_bias_enable;
-            BitField<7, 1, u32> depth_clamp_enable;
+            BitField<7, 1, u32> depth_clamp_disabled;
             BitField<8, 1, u32> ndc_minus_one_to_one;
             BitField<9, 2, u32> cull_face;
             BitField<11, 1, u32> front_face;

src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp

@@ -249,7 +249,7 @@ vk::Pipeline VKGraphicsPipeline::CreatePipeline(const RenderPassParams& renderpa
     rasterization_ci.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
     rasterization_ci.pNext = nullptr;
     rasterization_ci.flags = 0;
-    rasterization_ci.depthClampEnable = rs.depth_clamp_enable;
+    rasterization_ci.depthClampEnable = rs.depth_clamp_disabled == 0 ? VK_TRUE : VK_FALSE;
     rasterization_ci.rasterizerDiscardEnable = VK_FALSE;
     rasterization_ci.polygonMode = VK_POLYGON_MODE_FILL;
     rasterization_ci.cullMode =