CMake/Modules/FindSDL_gfx.cmake

# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindSDL_gfx
-----------

.. versionadded:: 3.25

Locate SDL_gfx library

This module defines:

::

  SDL::SDL_gfx, the name of the target to use with target_*() commands
  SDL_GFX_LIBRARIES, the name of the library to link against
  SDL_GFX_INCLUDE_DIRS, where to find the headers
  SDL_GFX_FOUND, if false, do not try to link against
  SDL_GFX_VERSION_STRING - human-readable string containing the
                             version of SDL_gfx

``$SDLDIR`` is an environment variable that would correspond to the
``./configure --prefix=$SDLDIR`` used in building SDL.
#]=======================================================================]

cmake_policy(PUSH)
cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>

find_path(SDL_GFX_INCLUDE_DIRS
  NAMES
    SDL_framerate.h
    SDL_gfxBlitFunc.h
    SDL_gfxPrimitives.h
    SDL_gfxPrimitives_font.h
    SDL_imageFilter.h
    SDL_rotozoom.h
  HINTS
    ENV SDLGFXDIR
    ENV SDLDIR
  PATH_SUFFIXES SDL
                # path suffixes to search inside ENV{SDLDIR}
                include/SDL include/SDL12 include/SDL11 include
)

if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  set(VC_LIB_PATH_SUFFIX lib/x64)
else()
  set(VC_LIB_PATH_SUFFIX lib/x86)
endif()

find_library(SDL_GFX_LIBRARIES
  NAMES SDL_gfx
  HINTS
    ENV SDLGFXDIR
    ENV SDLDIR
  PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
)

if(SDL_GFX_INCLUDE_DIRS AND EXISTS "${SDL_GFX_INCLUDE_DIRS}/SDL_gfxPrimitives.h")
  file(STRINGS "${SDL_GFX_INCLUDE_DIRS}/SDL_gfxPrimitives.h" SDL_GFX_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_GFXPRIMITIVES_MAJOR[ \t]+[0-9]+$")
  file(STRINGS "${SDL_GFX_INCLUDE_DIRS}/SDL_gfxPrimitives.h" SDL_GFX_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_GFXPRIMITIVES_MINOR[ \t]+[0-9]+$")
  file(STRINGS "${SDL_GFX_INCLUDE_DIRS}/SDL_gfxPrimitives.h" SDL_GFX_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_GFXPRIMITIVES_MICRO[ \t]+[0-9]+$")
  string(REGEX REPLACE "^#define[ \t]+SDL_GFXPRIMITIVES_MAJOR[ \t]+([0-9]+)$" "\\1" SDL_GFX_VERSION_MAJOR "${SDL_GFX_VERSION_MAJOR_LINE}")
  string(REGEX REPLACE "^#define[ \t]+SDL_GFXPRIMITIVES_MINOR[ \t]+([0-9]+)$" "\\1" SDL_GFX_VERSION_MINOR "${SDL_GFX_VERSION_MINOR_LINE}")
  string(REGEX REPLACE "^#define[ \t]+SDL_GFXPRIMITIVES_MICRO[ \t]+([0-9]+)$" "\\1" SDL_GFX_VERSION_PATCH "${SDL_GFX_VERSION_PATCH_LINE}")
  set(SDL_GFX_VERSION_STRING ${SDL_GFX_VERSION_MAJOR}.${SDL_GFX_VERSION_MINOR}.${SDL_GFX_VERSION_PATCH})
  unset(SDL_GFX_VERSION_MAJOR_LINE)
  unset(SDL_GFX_VERSION_MINOR_LINE)
  unset(SDL_GFX_VERSION_PATCH_LINE)
  unset(SDL_GFX_VERSION_MAJOR)
  unset(SDL_GFX_VERSION_MINOR)
  unset(SDL_GFX_VERSION_PATCH)
endif()

include(FindPackageHandleStandardArgs)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL_gfx
                                  REQUIRED_VARS SDL_GFX_LIBRARIES SDL_GFX_INCLUDE_DIRS
                                  VERSION_VAR SDL_GFX_VERSION_STRING)

if(SDL_gfx_FOUND)
  if(NOT TARGET SDL::SDL_gfx)
    add_library(SDL::SDL_gfx INTERFACE IMPORTED)
    set_target_properties(SDL::SDL_gfx PROPERTIES
      INTERFACE_INCLUDE_DIRECTORIES "${SDL_GFX_INCLUDE_DIRS}"
      INTERFACE_LINK_LIBRARIES "${SDL_GFX_LIBRARIES}")
  endif()
endif()

cmake_policy(POP)