vk: Prevent WAW hazard when the window size exceeds the output draw box

rpcs3/Emu/RSX/VK/VKPresent.cpp

@@ -612,6 +612,19 @@ void VKGSRender::flip(const rsx::display_flip_info_t& info)
 		vk::change_image_layout(*m_current_command_buffer, target_image, present_layout, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, subresource_range);
 		vkCmdClearColorImage(*m_current_command_buffer, target_image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &clear_black, 1, &subresource_range);
 
+		// Prevent WAW on transfer writes
+		vk::insert_image_memory_barrier(
+			*m_current_command_buffer,
+			target_image,
+			target_layout,
+			target_layout,
+			VK_PIPELINE_STAGE_TRANSFER_BIT,
+			VK_PIPELINE_STAGE_TRANSFER_BIT,
+			VK_ACCESS_TRANSFER_WRITE_BIT,
+			VK_ACCESS_TRANSFER_WRITE_BIT,
+			subresource_range
+		);
+
 		target_layout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
 	}