3 files changed, 77 insertions, 3 deletions

diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index ba19d1ca2..54a902f56 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -7,6 +7,7 @@
 #include "common/assert.h"
 #include "core/core.h"
 #include "core/core_timing.h"
+#include "video_core/dirty_flags.h"
 #include "video_core/engines/maxwell_3d.h"
 #include "video_core/gpu.h"
 #include "video_core/memory_manager.h"
@@ -208,6 +209,14 @@ void Maxwell3D::ProcessMethodCall(u32 method, u32 argument, u32 nonshadow_argume
         return ProcessCBBind(4);
     case MAXWELL3D_REG_INDEX(draw.vertex_end_gl):
         return DrawArrays();
+    case MAXWELL3D_REG_INDEX(small_index):
+        regs.index_array.count = regs.small_index.count;
+        regs.index_array.first = regs.small_index.first;
+        dirty.flags[VideoCommon::Dirty::IndexBuffer] = true;
+        return DrawArrays();
+    case MAXWELL3D_REG_INDEX(topology_override):
+        use_topology_override = true;
+        return;
     case MAXWELL3D_REG_INDEX(clear_buffers):
         return ProcessClearBuffers();
     case MAXWELL3D_REG_INDEX(query.query_get):
@@ -352,6 +361,35 @@ void Maxwell3D::CallMethodFromMME(u32 method, u32 method_argument) {
     }
 }
 
+void Maxwell3D::ProcessTopologyOverride() {
+    using PrimitiveTopology = Maxwell3D::Regs::PrimitiveTopology;
+    using PrimitiveTopologyOverride = Maxwell3D::Regs::PrimitiveTopologyOverride;
+
+    PrimitiveTopology topology{};
+
+    switch (regs.topology_override) {
+    case PrimitiveTopologyOverride::None:
+        topology = regs.draw.topology;
+        break;
+    case PrimitiveTopologyOverride::Points:
+        topology = PrimitiveTopology::Points;
+        break;
+    case PrimitiveTopologyOverride::Lines:
+        topology = PrimitiveTopology::Lines;
+        break;
+    case PrimitiveTopologyOverride::LineStrip:
+        topology = PrimitiveTopology::LineStrip;
+        break;
+    default:
+        topology = static_cast<PrimitiveTopology>(regs.topology_override);
+        break;
+    }
+
+    if (use_topology_override) {
+        regs.draw.topology.Assign(topology);
+    }
+}
+
 void Maxwell3D::FlushMMEInlineDraw() {
     LOG_TRACE(HW_GPU, "called, topology={}, count={}", regs.draw.topology.Value(),
               regs.vertex_buffer.count);
@@ -362,6 +400,8 @@ void Maxwell3D::FlushMMEInlineDraw() {
     ASSERT_MSG(!regs.draw.instance_next || !regs.draw.instance_cont,
                "Illegal combination of instancing parameters");
 
+    ProcessTopologyOverride();
+
     const bool is_indexed = mme_draw.current_mode == MMEDrawMode::Indexed;
     if (ShouldExecute()) {
         rasterizer->Draw(is_indexed, true);
@@ -521,6 +561,8 @@ void Maxwell3D::DrawArrays() {
     ASSERT_MSG(!regs.draw.instance_next || !regs.draw.instance_cont,
                "Illegal combination of instancing parameters");
 
+    ProcessTopologyOverride();
+
     if (regs.draw.instance_next) {
         // Increment the current instance *before* drawing.
         state.current_instance += 1;
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index 38d9b6660..357a74c70 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -367,6 +367,22 @@ public:
             Patches = 0xe,
         };
 
+        // Constants as from NVC0_3D_UNK1970_D3D
+        // https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/src/gallium/drivers/nouveau/nvc0/nvc0_3d.xml.h#L1598
+        enum class PrimitiveTopologyOverride : u32 {
+            None = 0x0,
+            Points = 0x1,
+            Lines = 0x2,
+            LineStrip = 0x3,
+            Triangles = 0x4,
+            TriangleStrip = 0x5,
+            LinesAdjacency = 0xa,
+            LineStripAdjacency = 0xb,
+            TrianglesAdjacency = 0xc,
+            TriangleStripAdjacency = 0xd,
+            Patches = 0xe,
+        };
+
         enum class IndexFormat : u32 {
             UnsignedByte = 0x0,
             UnsignedShort = 0x1,
@@ -1200,7 +1216,12 @@ public:
                     }
                 } index_array;
 
-                INSERT_PADDING_WORDS_NOINIT(0x7);
+                union {
+                    BitField<0, 16, u32> first;
+                    BitField<16, 16, u32> count;
+                } small_index;
+
+                INSERT_PADDING_WORDS_NOINIT(0x6);
 
                 INSERT_PADDING_WORDS_NOINIT(0x1F);
 
@@ -1244,7 +1265,11 @@ public:
                     BitField<11, 1, u32> depth_clamp_disabled;
                 } view_volume_clip_control;
 
-                INSERT_PADDING_WORDS_NOINIT(0x1F);
+                INSERT_PADDING_WORDS_NOINIT(0xC);
+
+                PrimitiveTopologyOverride topology_override;
+
+                INSERT_PADDING_WORDS_NOINIT(0x12);
 
                 u32 depth_bounds_enable;
 
@@ -1529,6 +1554,9 @@ private:
     /// Handles a write to the VERTEX_END_GL register, triggering a draw.
     void DrawArrays();
 
+    /// Handles use of topology overrides (e.g., to avoid using a topology assigned from a macro)
+    void ProcessTopologyOverride();
+
     // Handles a instance drawcall from MME
     void StepInstance(MMEDrawMode expected_mode, u32 count);
 
@@ -1556,6 +1584,7 @@ private:
     Upload::State upload_state;
 
     bool execute_on{true};
+    bool use_topology_override{false};
 };
 
 #define ASSERT_REG_POSITION(field_name, position)                                                  \
@@ -1672,6 +1701,7 @@ ASSERT_REG_POSITION(draw, 0x585);
 ASSERT_REG_POSITION(primitive_restart, 0x591);
 ASSERT_REG_POSITION(provoking_vertex_last, 0x5A1);
 ASSERT_REG_POSITION(index_array, 0x5F2);
+ASSERT_REG_POSITION(small_index, 0x5F9);
 ASSERT_REG_POSITION(polygon_offset_clamp, 0x61F);
 ASSERT_REG_POSITION(instanced_arrays, 0x620);
 ASSERT_REG_POSITION(vp_point_size, 0x644);
@@ -1681,6 +1711,7 @@ ASSERT_REG_POSITION(cull_face, 0x648);
 ASSERT_REG_POSITION(pixel_center_integer, 0x649);
 ASSERT_REG_POSITION(viewport_transform_enabled, 0x64B);
 ASSERT_REG_POSITION(view_volume_clip_control, 0x64F);
+ASSERT_REG_POSITION(topology_override, 0x65C);
 ASSERT_REG_POSITION(depth_bounds_enable, 0x66F);
 ASSERT_REG_POSITION(logic_op, 0x671);
 ASSERT_REG_POSITION(clear_buffers, 0x674);
diff --git a/src/video_core/renderer_vulkan/vk_texture_cache.cpp b/src/video_core/renderer_vulkan/vk_texture_cache.cpp
index 0f62779de..ca6019a3a 100644
--- a/src/video_core/renderer_vulkan/vk_texture_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_texture_cache.cpp
@@ -1067,7 +1067,8 @@ void TextureCacheRuntime::ConvertImage(Framebuffer* dst, ImageView& dst_view, Im
         }
         break;
     case PixelFormat::A8B8G8R8_UNORM:
-        if (src_view.format == PixelFormat::S8_UINT_D24_UNORM) {
+        if (src_view.format == PixelFormat::S8_UINT_D24_UNORM ||
+            src_view.format == PixelFormat::D24_UNORM_S8_UINT) {
             return blit_image_helper.ConvertD24S8ToABGR8(dst, src_view);
         }
         break;