Transition MSAA images to general layout without uploading data

src/video_core/renderer_opengl/gl_texture_cache.h

@@ -118,6 +118,8 @@ public:
 
     void InsertUploadMemoryBarrier();
 
+    void TransitionImageLayout(Image& image) {}
+
     FormatProperties FormatInfo(VideoCommon::ImageType type, GLenum internal_format) const;
 
     bool HasNativeBgr() const noexcept {

src/video_core/renderer_vulkan/vk_texture_cache.cpp

@@ -2013,4 +2013,32 @@ void TextureCacheRuntime::AccelerateImageUpload(
     ASSERT(false);
 }
 
+void TextureCacheRuntime::TransitionImageLayout(Image& image) {
+    if (!image.ExchangeInitialization()) {
+        VkImageMemoryBarrier barrier{
+            .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
+            .pNext = nullptr,
+            .srcAccessMask = VK_ACCESS_NONE,
+            .dstAccessMask = VK_ACCESS_MEMORY_READ_BIT | VK_ACCESS_MEMORY_WRITE_BIT,
+            .oldLayout = VK_IMAGE_LAYOUT_UNDEFINED,
+            .newLayout = VK_IMAGE_LAYOUT_GENERAL,
+            .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
+            .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
+            .image = image.Handle(),
+            .subresourceRange{
+                .aspectMask = image.AspectMask(),
+                .baseMipLevel = 0,
+                .levelCount = VK_REMAINING_MIP_LEVELS,
+                .baseArrayLayer = 0,
+                .layerCount = VK_REMAINING_ARRAY_LAYERS,
+            },
+        };
+        scheduler.RequestOutsideRenderPassOperationContext();
+        scheduler.Record([barrier = barrier](vk::CommandBuffer cmdbuf) {
+            cmdbuf.PipelineBarrier(VK_PIPELINE_STAGE_ALL_COMMANDS_BIT,
+                                   VK_PIPELINE_STAGE_ALL_COMMANDS_BIT, 0, barrier);
+        });
+    }
+}
+
 } // namespace Vulkan

src/video_core/renderer_vulkan/vk_texture_cache.h

@@ -92,6 +92,8 @@ public:
 
     void InsertUploadMemoryBarrier() {}
 
+    void TransitionImageLayout(Image& image);
+
     bool HasBrokenTextureViewFormats() const noexcept {
         // No known Vulkan driver has broken image views
         return false;

src/video_core/texture_cache/texture_cache.h

@@ -1016,6 +1016,7 @@ void TextureCache<P>::RefreshContents(Image& image, ImageId image_id) {
 
     if (image.info.num_samples > 1 && !runtime.CanUploadMSAA()) {
         LOG_WARNING(HW_GPU, "MSAA image uploads are not implemented");
+        runtime.TransitionImageLayout(image);
         return;
     }
     if (True(image.flags & ImageFlagBits::AsynchronousDecode)) {