Text rendering

1 files changed, 32 insertions, 1 deletions

diff --git a/src/tsar.c b/src/tsar.c
index 7277d28..869d73c 100644
--- a/src/tsar.c
+++ b/src/tsar.c
@@ -14,6 +14,9 @@ Display* display;
 Window win;
 GC gc;
 
+XftFont* font;
+XftColor fg_color;
+
 static int height = 17;
 static int width = 1000;
 static float width_ratio = 1;
@@ -67,14 +70,40 @@ void init_x(void) {
   gc = XCreateGC(display, win, 0, NULL);
   XSetForeground(display, gc, 0xFFFFFF);
 
+  const char font_name[] = "CommitMono:style=Regular:antialias=true";
+  font = XftFontOpenName(display, DefaultScreen(display), font_name);
+
+  XftColorAllocName(
+    display,
+    DefaultVisual(display, DefaultScreen(display)),
+    DefaultColormap(display, DefaultScreen(display)),
+    "#FFFFFF",
+    &fg_color
+  );
+
   XFlush(display);
 }
 
 void deinit_x(void) {
+  XftFontClose(display, font);
   XUnmapWindow(display, win);
   XDestroyWindow(display, win);
 }
 
+void draw_text(const char* text, int x, int y) {
+  XftDraw* xft_draw = XftDrawCreate(
+    display,
+    win,
+    DefaultVisual(display, DefaultScreen(display)),
+    DefaultColormap(display, DefaultScreen(display))
+  );
+
+  int dy = y + (height - font->height) / 2 + font->ascent;
+  XftDrawString8(xft_draw, &fg_color, font, x, dy, (const FcChar8*)text, strlen(text));
+
+  XftDrawDestroy(xft_draw);
+}
+
 int main(void) {
   init_pipe();
   init_x();
@@ -83,7 +112,9 @@ int main(void) {
     XEvent ev;
     XNextEvent(display, &ev);
 
-    XDrawLine(display, win, gc, 0, 0, width, height);
+    XClearWindow(display, win);
+
+    draw_text("Hello, world!", 0, 0);
 
     XFlush(display);
     await_change();