Using fontconfig to fecth font filename

Makefile

 
 ifeq ($(DEBUG), 0)
 	ASFLAGS=-felf64
-	LDFLAGS=-s -melf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2
+	LDFLAGS=-s -melf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -lfontconfig
 	#LDFLAGS=-s -melf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -lSDL2
 else
 	ASFLAGS=-felf64 -g -F dwarf -l $(TARGET).lst
 	#LDFLAGS=-g -melf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -lSDL
-	LDFLAGS=-g -melf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2
+	LDFLAGS=-g -melf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -lfontconfig
 endif
 ifeq ($(SDL), 2)
-	LDFLAGS += -lSDL2
+	LDFLAGS += -lSDL2 -lSDL_ttf
 	ASFLAGS += -DSDL2=1
 else
-	LDFLAGS += -lSDL
+	LDFLAGS += -lSDL -lSDL_ttf
 	ASFLAGS += -DSDL1=1
 endif
 

sdl.asm

 Extern SDL_UnlockSurface
 Extern SDL_UpperBlit
 %define SDL_BlitSurface SDL_UpperBlit
+Extern TTF_OpenFont
+Extern TTF_RenderText_Solid
+Extern TTF_Init
+
 
 %ifdef SDL1
 	%define SDL_QUIT 0x0C
 mov %1, [%2]
 mov %1, [%1 + 32]
 %endmacro
+
+
+;fontconfig
+Extern FcInitLoadConfigAndFonts
+Extern FcPatternCreate
+Extern FcObjectSetBuild
+Extern FcFontList
+Extern FcPatternGetString
+Extern FcPatternPrint
+

yaglitch.asm

 	def_str bigline_error, {"Line with more than 16 tokens !", 0xA}
 	def_str nl_error, {"Character \n is not the last one", 0xA}
 	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
 
 section .bss
 
 
 	visu_surf: resq 1
 
+	text_surf: resq 1
+
+	ttf_font: resq 1
+
+	sdl_color: resd 1
+
+	fc_config: resq 1
+	fc_pattern: resq 1
+	fc_object_set: resq 1
+	fc_font_set: resq 1
+	fc_font_file_ptr: resq 1
+
 section .text
 global _start
 _start:
 	test rax, rax
 	jnz exit_fatal
 
+	; Init SDL
 	mov rdi, 0x0000FFFF
 	call SDL_Init
 
+	; Open Audio -> setting spec to 8bit etc. (see .data)
 	mov rdi, audiospec_wanted
 	mov rsi, audiospec_recv
 	call SDL_OpenAudio
 
+	%ifdef MIX_AUDIO
+		; init callback heap infos
+		mov rax, 0xc ; brk
+		xor rdi, rdi ; get heap start addr
+		mov [cllbck_heapsz], rdi
+		syscall
+		cmp rax, -1
+		je exit_fatal
+		mov [cllbck_heap], rax
+	%endif
+
 	; video init 256*256 window
 	; init visu_scr : *screen
 	%ifdef SDL1
 
 	; 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
+	mov rdi, [fc_config]
+	mov rsi, [fc_pattern]
+	mov rdx, [fc_object_set]
+	call FcFontList
+	mov [fc_font_set], 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
+	mov rsi, FC_FILE
+	xor rdx, rdx
+	mov rcx, fc_font_file_ptr
+	call FcPatternGetString
+dbg:
+	; Init SDL_ttf
+	call TTF_Init
+	cmp rax, 0
+	jl sdl_error
+	; open font
+	mov rdi, [fc_font_file_ptr]
+	mov rsi, 18 ; 18 pts/inch
+	call TTF_OpenFont
+	test rax, rax
+	jz sdl_error
+	mov [ttf_font], rax
 
-	%ifdef MIX_AUDIO
-		; init callback heap infos
-		mov rax, 0xc ; brk
-		xor rdi, rdi ; get heap start addr
-		mov [cllbck_heapsz], rdi
-		syscall
-		cmp rax, -1
-		je exit_fatal
-		mov [cllbck_heap], rax
-	%endif
+	mov dword [sdl_color], 0xFFFFFFFF
+	mov rdi, [ttf_font]
+	mov rsi, glitch_name
+	mov rdx, sdl_color
+	call TTF_RenderText_Solid ; render text in surface
+
+	; blit & flip text surface
+	mov rdi, [ttf_font]
+	call blitflip_visu
 
-	audio_start:
-		;start audio
-		xor rdi, rdi
-		call SDL_PauseAudio
+
+audio_start:
+	;start audio
+	xor rdi, rdi
+	call SDL_PauseAudio
 
 loop_event:
 	xor rdi, rdi