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.

2 files changed, 23 insertions, 0 deletions

diff --git a/data/shaders/font-fragment.glsl b/data/shaders/font-fragment.glsl
new file mode 100644
index 0000000..3dd10f1
--- /dev/null
+++ b/data/shaders/font-fragment.glsl
@@ -0,0 +1,8 @@
+#version 120
+
+uniform sampler2D color_texture;
+uniform vec4 color;
+
+void main (void) {
+    gl_FragColor = texture2D(color_texture, gl_TexCoord[0].st) * color;
+}
diff --git a/data/shaders/font-vertex.glsl b/data/shaders/font-vertex.glsl
new file mode 100644
index 0000000..196da12
--- /dev/null
+++ b/data/shaders/font-vertex.glsl
@@ -0,0 +1,15 @@
+#version 120
+
+uniform mat4 projection;
+uniform vec2 position;
+uniform vec2 anchor;
+
+void main(void) {
+    mat4 translation = mat4(1.0, 0.0, 0.0, position.x - anchor.x,
+                            0.0, 1.0, 0.0, position.y - anchor.y,
+                            0.0, 0.0, 1.0, 0.0,
+                            0.0, 0.0, 0.0, 1.0);
+
+    gl_Position = projection * (gl_Vertex * translation);
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+}