vk: disable small tex optimization on macOS. Fix libMoltenVK embedding

small textures linear optimization leads to texture corruption with
moltenvk.
Copy libMoltenVk to correct runtime output dir.

CMakeLists.txt

@@ -1309,9 +1309,11 @@ if(NOT LIBRETRO)
 				${MULTITOUCH_SUPPORT_LIBRARY}
 				${OPENGL_LIBRARY}
 				${IOSURFACE_LIBRARY})
+
+			set(output_dir $<$<CONFIG:Release>:${CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE}>$<$<CONFIG:RelWithDebInfo>:${CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELWITHDEBINFO}>$<$<CONFIG:MinSizeRel>:${CMAKE_RUNTIME_OUTPUT_DIRECTORY_MINSIZEREL}>$<$<CONFIG:Debug>:${CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG}>)
 			add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
             	COMMAND ${CMAKE_COMMAND} -E copy "$ENV{VULKAN_SDK}/lib/libMoltenVK.dylib"
-                	${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/Flycast.app/Contents/Frameworks/libvulkan.dylib)
+            		${CMAKE_CURRENT_BINARY_DIR}/$<$<STREQUAL:$<GENEX_EVAL:${output_dir}>,>:$<CONFIG>>${output_dir}/Flycast.app/Contents/Frameworks/libvulkan.dylib)
 		endif()
 	elseif(UNIX OR NINTENDO_SWITCH)
 	    if(NOT BUILD_TESTING)

core/rend/vulkan/texture.cpp

@@ -202,11 +202,14 @@ void Texture::Init(u32 width, u32 height, vk::Format format, u32 dataSize, bool
 			== vk::FormatFeatureFlagBits::eSampledImage
 			? vk::ImageTiling::eOptimal
 			: vk::ImageTiling::eLinear;
+#ifndef __APPLE__
+	// Texture corruption with moltenvk. Perf improvement on other platforms
 	if (height <= 32
 			&& dataSize / height <= 64
 			&& !mipmapped
 			&& (formatProperties.linearTilingFeatures & vk::FormatFeatureFlagBits::eSampledImage) == vk::FormatFeatureFlagBits::eSampledImage)
 		imageTiling = vk::ImageTiling::eLinear;
+#endif
 	needsStaging = imageTiling != vk::ImageTiling::eLinear;
 	vk::ImageLayout initialLayout;
 	vk::ImageUsageFlags usageFlags = vk::ImageUsageFlagBits::eSampled;