Add fontconfig lookup

2 files changed, 21 insertions, 4 deletions

diff --git a/Makefile b/Makefile
index 821cb9b..f400d3e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 PREFIX ?= /usr/local
 BINDIR ?= /bin
 
-LDLIBS = -lglfw -lGL $(shell pkg-config --libs freetype2)
-CFLAGS = $(shell pkg-config --cflags freetype2)
+LDLIBS = -lglfw -lGL $(shell pkg-config --libs freetype2 fontconfig)
+CFLAGS = $(shell pkg-config --cflags freetype2 fontconfig)
 
 ifeq ($(DEBUG),1)
 CFLAGS += -Og -g
diff --git a/xnote.c b/xnote.c
index a554f42..c35193c 100644
--- a/xnote.c
+++ b/xnote.c
@@ -1,5 +1,6 @@
 #include <GL/gl.h>
 #include <GLFW/glfw3.h>
+#include <fontconfig/fontconfig.h>
 #include <ft2build.h>
 #include FT_FREETYPE_H
 
@@ -355,11 +356,27 @@ main(void)
 
 	push_event(EVENT_START);
 
+	const char *fontname = getenv("XNOTE_FONT") ?: "Arial";
+	FcConfig *config = FcInitLoadConfigAndFonts();
+	FcPattern *pattern = FcNameParse((const FcChar8 *)fontname);
+	FcConfigSubstitute(config, pattern, FcMatchPattern);
+	FcDefaultSubstitute(pattern);
+	FcResult result;
+	FcPattern *font = FcFontMatch(config, pattern, &result);
+	if (!font) die("Failed to load font: %s", fontname);
+	FcChar8 *filepath = NULL;
+	assert(FcPatternGetString(font, FC_FILE, 0, &filepath) == FcResultMatch);
+	int fontsize = 0;
+	assert(FcPatternGetInteger(font, FC_SIZE, 0, &fontsize) == FcResultMatch);
+
 	FT_Library freetype;
 	FT_Face face;
 	assert(!FT_Init_FreeType(&freetype));
-	assert(!FT_New_Face(freetype, "NotoSansMono-Regular.ttf", 0, &face));
-	assert(!FT_Set_Char_Size(face, 16 * 64, 0, 300, 300));
+	assert(!FT_New_Face(freetype, (const char *)filepath, 0, &face));
+	assert(!FT_Set_Char_Size(face, 0, fontsize * 64, 300, 300));
+
+	FcPatternDestroy(pattern);
+	FcConfigDestroy(config);
 
 	glGenTextures(128, glyphs);
 	for (size_t c = 0; c < 128; c++) {