fix more silly typos, add default callbacks to ISimpleManagedSurface

Author: devshgraphicsprogramming

include/nbl/video/utilities/ISimpleManagedSurface.h

@@ -147,11 +147,11 @@ class NBL_API2 ISimpleManagedSurface : public core::IReferenceCounted
 					swapchain = nullptr;
 				}
 
-				// here you drop your own resources of the base class
-				virtual void invalidate_impl() = 0;
+				// Here you drop your own resources of the base class
+				virtual void invalidate_impl() {}
 
-				// extra things you might need
-				virtual bool onCreateSwapchain_impl(const uint8_t qFam) = 0;
+				// For creating extra per-image or swapchain resources you might need
+				virtual bool onCreateSwapchain_impl(const uint8_t qFam) {return true;}
 
 				// We start with a `nullptr` swapchain because some implementations might defer its creation
 				core::smart_refctd_ptr<ISwapchain> swapchain = {};

src/nbl/video/IGPUCommandBuffer.cpp

@@ -1273,7 +1273,7 @@ bool IGPUCommandBuffer::blitImage(const IGPUImage* const srcImage, const IGPUIma
         return false;
 
     const auto& dstParams = dstImage->getCreationParameters();
-    if (!dstImage || !this->isCompatibleDevicewise(dstImage) || !dstParams.usage.hasFlags(IGPUImage::EUF_TRANSFER_SRC_BIT) || !physDev->getImageFormatUsages(dstImage->getTiling())[dstParams.format].blitDst)
+    if (!dstImage || !this->isCompatibleDevicewise(dstImage) || !dstParams.usage.hasFlags(IGPUImage::EUF_TRANSFER_DST_BIT) || !physDev->getImageFormatUsages(dstImage->getTiling())[dstParams.format].blitDst)
         return false;
 
     // TODO rest of: https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/vkCmdBlitImage.html#VUID-vkCmdBlitImage-srcImage-00229