Rewrite font module.

FTGL has been dropped in favor of SDL_ttf.

* 2d/font: Rewrite everything!
* 2d/wrappers/ftgl.scm: Delete it.
* configure.ac: Check for SDL_ttf.
* data/Makefile.am (shaders_DATA): Add font shaders.
* data/shaders/font-fragment.glsl: New shader.
* data/shaders/font-vertex.glsl: New shader.
* examples/font.scm: Rewrite font example.
* examples/fonts/AUTHORS: Delete it.
* examples/fonts/Boxy-Bold.ttf: Delete it.

3 files changed, 42 insertions, 10 deletions

diff --git a/examples/font.scm b/examples/font.scm
index 465600c..2398b36 100644
--- a/examples/font.scm
+++ b/examples/font.scm
@@ -1,22 +1,56 @@
 (use-modules (srfi srfi-9)
              (figl gl)
+             (2d agenda)
+             (2d fps)
              (2d color)
              (2d font)
              (2d game)
+             (2d mouse)
+             (2d signals)
              (2d vector2)
              (2d window))
 
 (load "common.scm")
 
-(define textbox
-  (make-textbox (load-font "fonts/Boxy-Bold.ttf" 48)
-                "The quick brown fox jumped over the lazy dog."
-                (vector2 240 160)
-                white
-                'left
-                200))
+(define font (load-default-font 18))
+(define position (vector2 320 240))
+(define text "The quick brown fox jumped over the lazy dog.")
+(define label (make-label font text position #:anchor 'center))
 
-(add-hook! draw-hook (lambda (dt alpha) (draw-textbox textbox)))
+(define fps-label-position (vector2 0 0))
+(define (make-fps-label)
+  (make-label font (format #f "FPS: ~d" (fps)) fps-label-position))
+(define fps-label (make-fps-label))
+
+(define mouse-label-position (vector2 0 20))
+(define mouse-label
+  (signal-map (lambda (p)
+                (let ((text (format #f "Mouse: (~d, ~d)" (vx p) (vy p))))
+                  (make-label font text mouse-label-position)))
+              mouse-position))
+
+(define gc-label-position (vector2 0 40))
+(define gc-counter (make-root-signal 0))
+(define gc-label
+  (signal-map (lambda (counter)
+                (let ((text (format #f "GCs: ~d" counter)))
+                  (make-label font text gc-label-position)))
+              gc-counter))
+
+(add-hook! after-gc-hook
+           (lambda ()
+             (signal-set! gc-counter (1+ (signal-ref gc-counter)))))
+
+(schedule-interval game-agenda
+                   (lambda ()
+                     (set! fps-label (make-fps-label)))
+                   60)
+
+(add-hook! draw-hook (lambda (dt alpha)
+                       (draw-label label)
+                       (draw-label fps-label)
+                       (draw-label (signal-ref mouse-label))
+                       (draw-label (signal-ref gc-label))))
 
 (with-window (make-window #:title "Fonts")
   (run-game-loop))
diff --git a/examples/fonts/AUTHORS b/examples/fonts/AUTHORS
deleted file mode 100644
index 0f278b8..0000000
--- a/examples/fonts/AUTHORS
+++ /dev/null
@@ -1,2 +0,0 @@
-Clint Bellanger and William Thompson
-http://opengameart.org/content/boxy-bold-truetype-font
\ No newline at end of file
diff --git a/examples/fonts/Boxy-Bold.ttf b/examples/fonts/Boxy-Bold.ttf
deleted file mode 100644
index 8076dc5..0000000
--- a/examples/fonts/Boxy-Bold.ttf
+++ /dev/null