Check some samples to ensure device is defined - avoid crash on exit

Author: SRSaunders

samples/api/texture_loading/texture_loading.cpp

@@ -1,4 +1,4 @@
-/* Copyright (c) 2019-2025, Sascha Willems
+/* Copyright (c) 2019-2026, Sascha Willems
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -408,10 +408,13 @@ void TextureLoading::load_texture()
 // Free all Vulkan resources used by a texture object
 void TextureLoading::destroy_texture(Texture texture)
 {
-	vkDestroyImageView(get_device().get_handle(), texture.view, nullptr);
-	vkDestroyImage(get_device().get_handle(), texture.image, nullptr);
-	vkDestroySampler(get_device().get_handle(), texture.sampler, nullptr);
-	vkFreeMemory(get_device().get_handle(), texture.device_memory, nullptr);
+	if (has_device())
+	{
+		vkDestroyImageView(get_device().get_handle(), texture.view, nullptr);
+		vkDestroyImage(get_device().get_handle(), texture.image, nullptr);
+		vkDestroySampler(get_device().get_handle(), texture.sampler, nullptr);
+		vkFreeMemory(get_device().get_handle(), texture.device_memory, nullptr);
+	}
 }
 
 void TextureLoading::build_command_buffers()

samples/api/texture_mipmap_generation/texture_mipmap_generation.cpp

@@ -1,4 +1,4 @@
-/* Copyright (c) 2019-2025, Sascha Willems
+/* Copyright (c) 2019-2026, Sascha Willems
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -285,9 +285,12 @@ void TextureMipMapGeneration::load_texture_generate_mipmaps(std::string file_nam
 // Free all Vulkan resources used by a texture object
 void TextureMipMapGeneration::destroy_texture(Texture texture)
 {
-	vkDestroyImageView(get_device().get_handle(), texture.view, nullptr);
-	vkDestroyImage(get_device().get_handle(), texture.image, nullptr);
-	vkFreeMemory(get_device().get_handle(), texture.device_memory, nullptr);
+	if (has_device())
+	{
+		vkDestroyImageView(get_device().get_handle(), texture.view, nullptr);
+		vkDestroyImage(get_device().get_handle(), texture.image, nullptr);
+		vkFreeMemory(get_device().get_handle(), texture.device_memory, nullptr);
+	}
 }
 
 void TextureMipMapGeneration::load_assets()

samples/performance/hpp_pipeline_cache/hpp_pipeline_cache.cpp

@@ -40,7 +40,10 @@ HPPPipelineCache::~HPPPipelineCache()
 		get_device().get_handle().destroyPipelineCache(pipeline_cache);
 	}
 
-	vkb::fs::write_temp(get_device().get_resource_cache().serialize(), "hpp_cache.data");
+	if (has_device())
+	{
+		vkb::fs::write_temp(get_device().get_resource_cache().serialize(), "hpp_cache.data");
+	}
 }
 
 bool HPPPipelineCache::prepare(const vkb::ApplicationOptions &options)

samples/performance/pipeline_cache/pipeline_cache.cpp

@@ -70,7 +70,10 @@ PipelineCache::~PipelineCache()
 		vkDestroyPipelineCache(get_device().get_handle(), pipeline_cache, nullptr);
 	}
 
-	vkb::fs::write_temp(get_device().get_resource_cache().serialize(), "cache.data");
+	if (has_device())
+	{
+		vkb::fs::write_temp(get_device().get_resource_cache().serialize(), "cache.data");
+	}
 }
 
 bool PipelineCache::prepare(const vkb::ApplicationOptions &options)