LIBS: added libjpeg dependency (not turbojpeg)

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.24)
 # if(CMAKE_GENERATOR STREQUAL "Xcode")
 # 	set(CMAKE_OSX_ARCHITECTURES "$(ARCHS_STANDARD)" CACHE STRING "")
 # endif()

contrib/libs/CMakeLists.txt

@@ -32,7 +32,7 @@ if (NOT USE_LIBS_FORCE_LOCAL)
 		message(STATUS "Pkg-config not found")
 	endif()
 	if (NOT SDL2_FOUND)
-		find_package(SDL2)
+		find_package(SDL2 GLOBAL)
 	endif()
 endif()
 if (SDL2_FOUND OR EMSCRIPTEN)
@@ -58,3 +58,13 @@ target_precompile_headers(sdl2 INTERFACE ${SDL_PCH})
 
 add_subdirectory(simplecpp)
 add_subdirectory(yocto)
+
+if (NOT USE_LIBS_FORCE_LOCAL)
+	find_package(JPEG GLOBAL)
+endif()
+if (NOT JPEG_FOUND)
+	add_subdirectory(jpeg)
+	add_library(JPEG::JPEG ALIAS jpeg)
+	set(JPEG_FOUND 1)
+endif()
+set(USE_LIBJPEG ${JPEG_FOUND} CACHE BOOL "Use libjpeg for jpeg saving" FORCE)

contrib/libs/jpeg/CMakeLists.txt

@@ -0,0 +1,54 @@
+set(SRCS
+	jaricom.c
+	jcapimin.c
+	jcapistd.c
+	jcarith.c
+	jccoefct.c
+	jccolor.c
+	jcdctmgr.c
+	jchuff.c
+	jcinit.c
+	jcmainct.c
+	jcmarker.c
+	jcmaster.c
+	jcomapi.c
+	jcparam.c
+	jcprepct.c
+	jcsample.c
+	jctrans.c
+	jdapimin.c
+	jdapistd.c
+	jdarith.c
+	jdatadst.c
+	jdatasrc.c
+	jdcoefct.c
+	jdcolor.c
+	jddctmgr.c
+	jdhuff.c
+	jdinput.c
+	jdmainct.c
+	jdmarker.c
+	jdmaster.c
+	jdmerge.c
+	jdpostct.c
+	jdsample.c
+	jdtrans.c
+	jerror.c
+	jfdctflt.c
+	jfdctfst.c
+	jfdctint.c
+	jidctflt.c
+	jidctfst.c
+	jidctint.c
+	jmemmgr.c
+	jmemnobs.c
+	jquant1.c
+	jquant2.c
+	jutils.c
+)
+set(LIB jpeg)
+engine_add_library(
+	LIB ${LIB}
+	SRCS ${SRCS}
+)
+target_include_directories(${LIB} PUBLIC .)