Extract trait functions on vk::Format into the additional header vulkan_format_traits.hpp.

tests/FormatTraits/CMakeLists.txt

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+# Copyright(c) 2018, NVIDIA CORPORATION. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cmake_minimum_required(VERSION 3.2)
+
+if (NOT TESTS_BUILD_ONLY_DYNAMIC)
+	project(FormatTraits)
+
+	set(HEADERS
+	)
+
+	set(SOURCES
+	  FormatTraits.cpp
+	)
+
+	source_group(headers FILES ${HEADERS})
+	source_group(sources FILES ${SOURCES})
+
+	add_executable(FormatTraits
+	  ${HEADERS}
+	  ${SOURCES}
+	)
+
+	set_target_properties(FormatTraits PROPERTIES FOLDER "Tests")
+	target_link_libraries(FormatTraits "${Vulkan_LIBRARIES}")
+endif()

tests/FormatTraits/FormatTraits.cpp

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+// Copyright(c) 2018, NVIDIA CORPORATION. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// VulkanHpp Samples : FormatTraits
+//                     Compile test on using format traits functions
+
+#include <vulkan/vulkan_format_traits.hpp>
+
+int main( int /*argc*/, char ** /*argv*/ )
+{
+  static_assert( vk::blockSize( vk::Format::eR4G4UnormPack8 ) == 1, "Wrong blocksize !" );
+
+  vk::Format format = vk::Format::eR4G4UnormPack8;
+  if ( vk::texelsPerBlock( format ) == 1 )
+  {
+    format = vk::Format::eR4G4B4A4UnormPack16;
+  }
+
+  assert( vk::blockExtent( vk::Format::eBc1RgbUnormBlock )[2] == 1 );
+
+  format = vk::Format::eBc1RgbUnormBlock;
+  if ( std::string( vk::compressionScheme( format ) ) == "BC" )
+  {
+    format = vk::Format::eR4G4UnormPack8;
+  }
+
+  static_assert( vk::isCompressed( vk::Format::eBc1RgbSrgbBlock ), "IsCompressed ?" );
+
+  assert( vk::packed( format ) == 8 );
+
+  if ( vk::componentsAreCompressed( format ) )
+  {
+    format = vk::Format::eBc1RgbUnormBlock;
+  }
+
+  constexpr vk::Format constFormat = vk::Format::eR4G4UnormPack8;
+  static_assert( vk::componentBits( constFormat, 1 ) == 4, "Wrong component bits !" );
+  assert( vk::componentCount( constFormat ) == 2 );
+
+  if ( strcmp( vk::componentName( constFormat, 0 ), "R" ) == 0 )
+  {
+    format = constFormat;
+  }
+
+  assert( std::string( vk::componentNumericFormat( constFormat, 1 ) ) == "UNORM" );
+
+  static_assert( vk::componentPlaneIndex( constFormat, 8 ) == 0, "Hoo" );
+
+  if ( vk::planeCount( format ) != 1 )
+  {
+    format = constFormat;
+  }
+
+  assert( vk::planeCompatibleFormat( vk::Format::eG8B8R83Plane420Unorm, 2 ) == vk::Format::eR8Unorm );
+
+  if ( vk::planeHeightDivisor( format, 0 ) == vk::planeWidthDivisor( format, 0 ) )
+  {
+    format = vk::Format::eG8B8R83Plane420Unorm;
+  }
+
+  return 0;
+}