chore: update build script

- change project layout for better understanding.
- update build script for more close to standard cmake way.

CMake/FindSTB.cmake

@@ -0,0 +1,52 @@
+# - Find STB library
+# Find the STB headers
+#
+# This module defines the following variables:
+#   STB_FOUND        - True if STB was found
+#   STB_INCLUDE_DIRS - Location of the STB headers
+#
+# This module defines the following imported targets:
+#   STB::STB - Header-only interface library for STB
+
+# STB_ROOT must be specified by the user
+if (NOT DEFINED STB_ROOT)
+    set(STB_FOUND FALSE)
+else ()
+    # Look for STB_image.h in the specified STB_ROOT directory
+    find_path(STB_INCLUDE_DIR
+        NAMES STB_image.h
+        HINTS ${STB_ROOT}
+        NO_DEFAULT_PATH
+    )
+
+    # Check find status
+    if(STB_INCLUDE_DIR)
+        set(STB_FOUND TRUE)
+        set(STB_INCLUDE_DIRS ${STB_INCLUDE_DIR})
+    else()
+        set(STB_FOUND FALSE)
+    endif()
+
+    # Hide intermediate variables
+    mark_as_advanced(STB_INCLUDE_DIR)
+endif ()
+
+# Check find result
+if (STB_FOUND)
+    # Add library
+    message(STATUS "Found STB library")
+    # Add library
+    add_library(STB INTERFACE IMPORTED)
+    # Add alias to it
+    add_library(STB::STB ALIAS STB)
+    # Setup header files
+    set_target_properties(STB PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES
+        "${STB_INCLUDE_DIRS}"
+    )
+else ()
+    # If it is required, show infomations.
+    if (std_FIND_REQUIRED)
+        message(FATAL_ERROR "Fail to find STB library.")
+    endif ()
+endif ()

CMake/VTVersion.hpp.in

@@ -1,6 +0,0 @@
-#pragma once
-
-#define LIBCMO_VER_MAJOR @PROJECT_VERSION_MAJOR@
-#define LIBCMO_VER_MINOR @PROJECT_VERSION_MINOR@
-#define LIBCMO_VER_PATCH @PROJECT_VERSION_PATCH@
-#define LIBCMO_VER_STR "@PROJECT_VERSION_MAJOR@.@PROJECT_VERSION_MINOR@.@PROJECT_VERSION_PATCH@"

CMake/custom_import_iconv.cmake

@@ -1,9 +0,0 @@
-if (WIN32)
-    # In Windows, we should not import Iconv.
-    # Send a notice to programmer.
-    message("Windows environment detected, skip finding Iconv!")
-else ()
-    # In non-Windows, we simply import Iconv from CMake preset.
-    # It will produce Iconv::Iconv target for including and linking.
-    find_package(Iconv REQUIRED)
-endif ()

CMake/custom_import_stb.cmake

@@ -1,14 +0,0 @@
-# Check stb path variable
-if (NOT DEFINED STB_IMAGE_PATH)
-    message(FATAL_ERROR "You must set STB_IMAGE_PATH variable to the root directory of std-image repository.")
-endif()
-
-# Add library
-add_library(stb-image INTERFACE IMPORTED)
-# Add alias for it
-add_library(stb::stb-image ALIAS stb-image)
-# Setup header files
-set_target_properties(stb-image PROPERTIES
-INTERFACE_INCLUDE_DIRECTORIES
-    "${STB_IMAGE_PATH}"
-)

CMake/custom_import_yycc.cmake

@@ -1,15 +0,0 @@
-
-# Check YYCC path environment variable
-if (NOT DEFINED YYCC_PATH)
-    message(FATAL_ERROR "You must set YYCC_PATH variable to one of YYCC CMake distribution installation path.")
-endif()
-
-# Find YYCC library
-# It will produce YYCC::YYCCommonplace target for including and linking.
-# 
-# Please note we MUST set CMake variable YYCCommonplace_ROOT to make sure CMake can found YYCC in out given path.
-# The cache status of YYCCommonplace_ROOT is doesn't matter.
-# CMake will throw error if we use HINTS feature in find_package to find YYCC.
-set(YYCCommonplace_ROOT ${YYCC_PATH} CACHE PATH
-"The path to YYCC CMake distribution installation path.")
-find_package(YYCCommonplace REQUIRED)

CMake/custom_import_zlib.cmake

@@ -1,34 +0,0 @@
-if (WIN32)
-    # In Windows, we use custom way to import ZLib.
-    # Before using this CMake file in Windows, you should do following steps first.
-    # 1. Get ZLib repository: https://github.com/madler/zlib
-    # 2. Navigate to `contrib/vstudio` and choose a proper Visual Studio project according to your environment.
-    # 3. Open project file and build. Then you will get the built binary.
-    # 4. The directory binary located is the argument you should passed to ZLIB_BINARY_PATH, for example: `contrib/vstudio/vc14/x64/ZlibDllRelease`
-
-    # Check ZLib path variable
-    if (NOT DEFINED ZLIB_HEADER_PATH)
-        message(FATAL_ERROR "You must set ZLIB_HEADER_PATH to the root directory of ZLib repository.")
-    endif()
-    if (NOT DEFINED ZLIB_BINARY_PATH)
-        message(FATAL_ERROR "You must set ZLIB_BINARY_PATH to the directory where include binary built by contributed Visual Studio project.")
-    endif()
-    # Add imported library
-    add_library(ZLIB INTERFACE IMPORTED)
-    # Add alias for it to let it has the same behavior with CMake imported ZLib.
-    add_library(ZLIB::ZLIB ALIAS ZLIB)
-    # Setup header files
-    set_target_properties(ZLIB PROPERTIES
-    INTERFACE_INCLUDE_DIRECTORIES
-        "${ZLIB_HEADER_PATH}"
-    )
-    # Setup lib files
-    set_target_properties(ZLIB PROPERTIES
-    INTERFACE_LINK_LIBRARIES
-        "${ZLIB_BINARY_PATH}/zlibwapi.lib"
-    )
-else ()
-    # In non-Windows, we simply import ZLib from CMake preset.
-    # It will produce ZLIB::ZLIB target for including and linking.
-    find_package(ZLIB REQUIRED)
-endif ()