Fetching some "default" font filename

With empty pattern, default config etc...

sdl.asm

 Extern FcFontList
 Extern FcPatternGetString
 Extern FcPatternPrint
+Extern FcPatternAdd
+Extern FcFontMatch
 
+%define FcTypeInteger 1
+%define FC_MONO 100

yaglitch.asm

 	def_str badop_error, {"Bad OP", 0xA}
 
 	window_title: db "Yaglitch", 0x0
-	font_name: db "Sans.ttf", 0x0
 	FC_FILE: db "file", 0x0
-	FC_FAMILY: db "family", 0x0
-	FC_LANG: db "lang", 0x0
+	;FC_SPACING: db "spacing", 0x0
+	;FC_LANG: db "lang", 0x0
 
 section .bss
 
 	fc_object_set: resq 1
 	fc_font_set: resq 1
 	fc_font_file_ptr: resq 1
+	fc_result: resd 1
 
 section .text
 global _start
 
 	; RAZ surface & blit
 	;call clear_screen ;useless
+
+
 	; init fontconfig
 	call FcInitLoadConfigAndFonts
 	mov [fc_config], rax
 	call FcPatternCreate
 	mov [fc_pattern], rax
 
-	mov rdi, FC_FILE
-	;mov rsi, FC_FAMILY
-	;mov rdx, FC_LANG
-	xor rcx, rcx
-	xor r8, r8
-	call FcObjectSetBuild
-
-	mov [fc_object_set], rax
+	;; fecthing EN monospace ??
+	;mov rdi, [fc_pattern]
+	;mov rsi, FC_SPACING
+	;mov rdx, FcTypeInteger ; type
+	;mov rcx, FC_MONO ; value
+	;mov rcx, 1
+	;call FcPatternAdd
+	;; not calling configsubstitute because no idea of the good "kind"
+	;; argument value... FcMatchfont ? FcMatchPattern ? FcMatchScan ? -_-
+
+	; fetching the "default" font if no pattern nor configsubstitute ??
 	mov rdi, [fc_config]
 	mov rsi, [fc_pattern]
-	mov rdx, [fc_object_set]
-	call FcFontList
-	mov [fc_font_set], rax
+	mov rdx, fc_result
+	call FcFontMatch
+	mov rdi, rax
+
 
-	mov rdi, [rax+8]
-	mov rdi, [rdi] ; 1st font in set
-	;mov rdi, [rdi+8] ; 2nd font in set
 	push rdi ; debug
 	call FcPatternPrint
-	pop rdi
+	pop rdi ; end debug
 	mov rsi, FC_FILE
 	xor rdx, rdx
 	mov rcx, fc_font_file_ptr
 	xor rdi, rdi
 	mov [event], rdi
 	mov rdi, event
-	call SDL_WaitEvent
+	call SDL_WaitEvent ; TODO : use poll to avoid IPC pipe blocking will waiting...
 	cmp rax, 0
 	je sdl_error ; error fetching event...
 	xor rdi, rdi