[Perf] (Magma): texture level uploads stop waiting for the GPU to drain; queue order and the upload barrier already order them (rd12 monolith 70.4 -> 83.4, openra 367 -> 745 fps).

MobileGL/MG_Backend/DirectVulkan/Renderer/VkTextureManager.cpp

@@ -1464,7 +1464,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
         // Submit older renderer work before adding the new bytes to the batch,
         // otherwise Draw(old T), TexSubImage(T), Draw(new T) can upload before
         // the first draw. A clean texture never reaches this submission boundary.
-        if (pVulkanRenderer && !pVulkanRenderer->FlushWirePendingCommandsForTextureUpdate()) {
+        if (pVulkanRenderer && !pVulkanRenderer->FlushWirePendingCommandsForTextureUpload()) {
             MGL_WIRE_DECLINE_AT(UploadFlushFailed,
                                 "texture {slot=%u, gen=%u}: earlier renderer work could not be submitted before "
                                 "its upload batch",

MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.h

@@ -155,6 +155,16 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             if (HasPendingRecordedWork() && !FlushPendingCommands()) return false;
             return WaitForSubmitsUpTo(m_submitCounter, UINT64_MAX);
         }
+        // The level-upload arm's half of the above, WITHOUT the CPU wait. Its bytes go through a
+        // staging buffer into an upload batch that is submitted on this same queue after this
+        // flush, and the batch's first barrier takes its source scope from the image's tracked
+        // layout (ALL_COMMANDS for GENERAL, the sampled-read stages for a read-only layout), so
+        // queue submission order already puts every earlier draw's access to the old texels
+        // ahead of the copy. The preserve arm keeps the wait: it retires the old image.
+        // (rd12 Magma: the wait was ~1.8 ms/frame of fence stall, one per lightmap update.)
+        Bool FlushWirePendingCommandsForTextureUpload() {
+            return !HasPendingRecordedWork() || FlushPendingCommands();
+        }
         // P7 wave 2 package B3: the submission that will carry whatever is recorded NEXT.
         // RetireWireObjects (WireDraw.inc) already tags future objects with exactly this, and
         // for the same reason: a draw being set up now is not in any submission yet, so the