[revert] TIC entry + Kill Switch for TFC on TFB

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -1066,13 +1066,38 @@ void RasterizerVulkan::UpdateDynamicStates() {
 }
 
 void RasterizerVulkan::HandleTransformFeedback() {
-    // Temporary kill-switch: disable transform feedback counters to stop the leak/crash path.
-    // TODO: Re-enable behind a safe guard once the underlying leak is resolved.
-    static std::once_flag warn_disabled;
-    std::call_once(warn_disabled, [] {
-        LOG_WARNING(Render_Vulkan, "Transform feedback counters temporarily disabled");
-    });
-    query_cache.CounterEnable(VideoCommon::QueryType::StreamingByteCount, false);
+    static std::once_flag warn_unsupported;
+
+    const auto& regs = maxwell3d->regs;
+    if (!device.IsExtTransformFeedbackSupported()) {
+        std::call_once(warn_unsupported, [&] {
+            LOG_ERROR(Render_Vulkan, "Transform feedbacks used but not supported");
+        });
+        query_cache.CounterEnable(VideoCommon::QueryType::StreamingByteCount, false);
+        return;
+    }
+    // Only enable the streamer when TFB is actually active and a buffer is bound; otherwise keep it off
+    const bool tfb_enabled = regs.transform_feedback_enabled != 0;
+    const bool has_active_tfb_buffer = [&regs] {
+        for (size_t i = 0; i < Maxwell::Regs::NumTransformFeedbackBuffers; i++) {
+            if (regs.transform_feedback.buffers[i].enable != 0) {
+                return true;
+            }
+        }
+        return false;
+    }();
+
+    if (!tfb_enabled || !has_active_tfb_buffer) {
+        query_cache.CounterEnable(VideoCommon::QueryType::StreamingByteCount, false);
+        return;
+    }
+
+    if (tfb_enabled) {
+        UNIMPLEMENTED_IF(regs.IsShaderConfigEnabled(Maxwell::ShaderType::TessellationInit) ||
+                         regs.IsShaderConfigEnabled(Maxwell::ShaderType::Tessellation));
+    }
+
+    query_cache.CounterEnable(VideoCommon::QueryType::StreamingByteCount, true);
 }
 
 void RasterizerVulkan::UpdateViewportsState(Tegra::Engines::Maxwell3D::Regs& regs) {

src/video_core/shader_environment.cpp

@@ -380,16 +380,8 @@ std::optional<u64> GenericEnvironment::TryFindSize() {
 Tegra::Texture::TICEntry GenericEnvironment::ReadTextureInfo(GPUVAddr tic_addr, u32 tic_limit,
                                                              bool via_header_index, u32 raw) {
     const auto handle{Tegra::Texture::TexturePair(raw, via_header_index)};
-    u32 tic_index = handle.first;
-    if (tic_index > tic_limit) {
-        static std::once_flag warn_oob_tic;
-        std::call_once(warn_oob_tic, [tic_index, tic_limit, via_header_index] {
-            LOG_WARNING(Shader, "TIC handle {} exceeds limit {} (via_header_index={}) — clamping",
-                        tic_index, tic_limit, via_header_index);
-        });
-        tic_index = tic_limit > 0 ? tic_limit : 0;
-    }
-    const GPUVAddr descriptor_addr{tic_addr + tic_index * sizeof(Tegra::Texture::TICEntry)};
+    ASSERT(handle.first <= tic_limit);
+    const GPUVAddr descriptor_addr{tic_addr + handle.first * sizeof(Tegra::Texture::TICEntry)};
     Tegra::Texture::TICEntry entry;
     gpu_memory->ReadBlock(descriptor_addr, &entry, sizeof(entry));
     return entry;