From fc2584672c096ae63469cce9ede9abaa4a95ece7 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Sun, 16 Feb 2014 10:44:24 -0500
Subject: 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.
---
 data/Makefile.am                |  4 +++-
 data/shaders/font-fragment.glsl |  8 ++++++++
 data/shaders/font-vertex.glsl   | 15 +++++++++++++++
 3 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 data/shaders/font-fragment.glsl
 create mode 100644 data/shaders/font-vertex.glsl

(limited to 'data')

diff --git a/data/Makefile.am b/data/Makefile.am
index b6d0d74..8fc3a3e 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -4,4 +4,6 @@ fonts_DATA = fonts/DejaVuSans.ttf
 shadersdir = $(pkgdatadir)/shaders
 shaders_DATA = 					\
   shaders/sprite-vertex.glsl			\
-  shaders/sprite-fragment.glsl
+  shaders/sprite-fragment.glsl			\
+  shaders/font-vertex.glsl			\
+  shaders/font-fragment.glsl
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;
+}
-- 
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