add transform function customization, remove hints #237

Job	Run time
Create test plan	6s
level1 / Haiku	1m 58s
level2 / Windows (MSVC, clang-cl x64)	6m 4s
level2 / iOS (CMake & xcode)	1m 56s
level2 / Android (CMake)	3m 57s
level2 / Sony PlayStation Vita (GLES w/ PVR_PSP2)	3m 14s
level2 / Windows (MSVC, clang-cl x86)	4m 39s
level2 / Sony PlayStation Vita (GLES w/ pib)	3m 2s
level2 / Sony PlayStation Portable	3m 41s
level2 / Windows (MSVC, x64)	4m 42s
level2 / Windows (MSVC, ARM)	3m 18s
level2 / MacOS (GNU prefix)	2m 57s
level2 / Windows (msys2, clang64)	6m 2s
level2 / Ubuntu 20.04 (Intel Compiler)	4m 27s
level2 / Windows (MSVC, ARM64)	4m 20s
level2 / Nintendo 3DS	1m 55s
level2 / tvOS (CMake & xcode)	1m 49s
level2 / Windows (MSVC, x86)	6m 5s
level2 / Windows (msys2, mingw32)	9m 9s
level2 / Steam Linux Runtime (Sniper)	1m 40s
level2 / Emscripten	9m 12s
level2 / NetBSD	2m 9s
level2 / Android (CMake, lean)	6m 39s
level2 / LoongArch64	3m 5s
level2 / Ubuntu 22.04	1m 38s
level2 / Android (Gradle)	2m 23s
level2 / GDK (MSVC, x64)	3m 4s
level2 / Android (Android.mk)	2m 11s
level2 / PowerPC	1m 44s
level2 / MacOS (Framework) (x64)	6m 55s
level2 / Sony PlayStation 2	4m 51s
level2 / MacOS (Framework) (arm64)	2m 24s
level2 / PowerPC64	1m 46s
level2 / Windows (msys2, ucrt64)	8m 54s
level2 / Ubuntu 20.04 (Intel oneAPI)	4m 56s
level2 / Windows (msys2, mingw64)	8m 29s
level2 / Windows (msys2, clang32)	7m 47s
level2 / FreeBSD	2m 11s
level2 / Ubuntu 20.04	2m 44s
level2 / RISC OS	1m 23s
	2h 39m 26s

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