started implementing color tinting on lighting

1 files changed, 98 insertions, 0 deletions

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+# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#.rst:
+# FindSDL2_image
+# -------------
+#
+# Locate SDL2_image library
+#
+# This module defines:
+#
+# ::
+#
+# SDL2_IMAGE_LIBRARIES, the name of the library to link against
+# SDL2_IMAGE_INCLUDE_DIRS, where to find the headers
+# SDL2_IMAGE_FOUND, if false, do not try to link against
+# SDL2_IMAGE_VERSION_STRING - human-readable string containing the
+# version of SDL_image
+#
+#
+#
+# For backward compatibility the following variables are also set:
+#
+# ::
+#
+# SDL2IMAGE_LIBRARY (same value as SDL_IMAGE_LIBRARIES)
+# SDL2IMAGE_INCLUDE_DIR (same value as SDL_IMAGE_INCLUDE_DIRS)
+# SDL2IMAGE_FOUND (same value as SDL_IMAGE_FOUND)
+#
+#
+#
+# $SDL2DIR is an environment variable that would correspond to the
+# ./configure --prefix=$SDL2DIR used in building SDL.
+#
+# Created by Eric Wing. This was influenced by the FindSDL.cmake
+# module, but with modifications to recognize OS X frameworks and
+# additional Unix paths (FreeBSD, etc).
+
+if(NOT SDL2_IMAGE_INCLUDE_DIR AND SDL2IMAGE_INCLUDE_DIR)
+  set(SDL2_IMAGE_INCLUDE_DIR ${SDL2IMAGE_INCLUDE_DIR} CACHE PATH "directory cache entry initialized from old variable name")
+endif()
+find_path(SDL2_IMAGE_INCLUDE_DIR SDL_image.h
+  HINTS
+    ENV SDL2IMAGEDIR
+    ENV SDL2DIR
+    ${SDL2_DIR}
+  PATH_SUFFIXES SDL2
+                # path suffixes to search inside ENV{SDL2DIR}
+                include/SDL2 include
+)
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+  set(VC_LIB_PATH_SUFFIX lib/x64)
+else()
+  set(VC_LIB_PATH_SUFFIX lib/x86)
+endif()
+
+if(NOT SDL2_IMAGE_LIBRARY AND SDL2IMAGE_LIBRARY)
+  set(SDL2_IMAGE_LIBRARY ${SDL2IMAGE_LIBRARY} CACHE FILEPATH "file cache entry initialized from old variable name")
+endif()
+find_library(SDL2_IMAGE_LIBRARY
+  NAMES SDL2_image
+  HINTS
+    ENV SDL2IMAGEDIR
+    ENV SDL2DIR
+    ${SDL2_DIR}
+  PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
+)
+
+if(SDL2_IMAGE_INCLUDE_DIR AND EXISTS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h")
+  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_MAJOR "${SDL_IMAGE_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_MINOR "${SDL_IMAGE_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_PATCH "${SDL_IMAGE_VERSION_PATCH_LINE}")
+  set(SDL2_IMAGE_VERSION_STRING ${SDL2_IMAGE_VERSION_MAJOR}.${SDL2_IMAGE_VERSION_MINOR}.${SDL2_IMAGE_VERSION_PATCH})
+  unset(SDL2_IMAGE_VERSION_MAJOR_LINE)
+  unset(SDL2_IMAGE_VERSION_MINOR_LINE)
+  unset(SDL2_IMAGE_VERSION_PATCH_LINE)
+  unset(SDL2_IMAGE_VERSION_MAJOR)
+  unset(SDL2_IMAGE_VERSION_MINOR)
+  unset(SDL2_IMAGE_VERSION_PATCH)
+endif()
+
+set(SDL2_IMAGE_LIBRARIES ${SDL2_IMAGE_LIBRARY})
+set(SDL2_IMAGE_INCLUDE_DIRS ${SDL2_IMAGE_INCLUDE_DIR})
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_image
+                                  REQUIRED_VARS SDL2_IMAGE_LIBRARIES SDL2_IMAGE_INCLUDE_DIRS
+                                  VERSION_VAR SDL2_IMAGE_VERSION_STRING)
+
+# for backward compatibility
+set(SDL2IMAGE_LIBRARY ${SDL2_IMAGE_LIBRARIES})
+set(SDL2IMAGE_INCLUDE_DIR ${SDL2_IMAGE_INCLUDE_DIRS})
+set(SDL2IMAGE_FOUND ${SDL2_IMAGE_FOUND})
+
+mark_as_advanced(SDL2_IMAGE_LIBRARY SDL2_IMAGE_INCLUDE_DIR)
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