GPU/TextureCache: Dump textures asynchronously

Saves lagging the emulation.

src/core/gpu_hw_texture_cache.cpp

@@ -2809,7 +2809,7 @@ void GPUTextureCache::DumpTexture(TextureReplacementType type, u32 offset_x, u32
   SmallString filename = name.ToString();
   filename.append(".png");
 
-  const std::string path = Path::Combine(dump_directory, filename);
+  std::string path = Path::Combine(dump_directory, filename);
   if (FileSystem::FileExists(path.c_str()))
     return;
 
@@ -2819,6 +2819,7 @@ void GPUTextureCache::DumpTexture(TextureReplacementType type, u32 offset_x, u32
   GPUTextureCache::DecodeTexture(mode, &g_vram[rect.top * VRAM_WIDTH + rect.left], palette_data, image.GetPixels(),
                                  image.GetPitch(), width, height, GPUTexture::Format::RGBA8);
 
+  System::QueueAsyncTask([path = std::move(path), image = std::move(image), width, height, semitransparent]() mutable {
     // TODO: Vectorize this.
     u32* image_pixels = reinterpret_cast<u32*>(image.GetPixels());
     const u32* image_pixels_end = image_pixels + (width * height);
@@ -2852,6 +2853,7 @@ void GPUTextureCache::DumpTexture(TextureReplacementType type, u32 offset_x, u32
 
     if (!image.SaveToFile(path.c_str()))
       ERROR_LOG("Failed to write texture dump to {}.", Path::GetFileName(path));
+  });
 }
 
 bool GPUTextureCache::IsMatchingReplacementPalette(HashType full_palette_hash, GPUTextureMode mode,