add GL module; move OpenGL loading from Window to GL

runtime/lib/gl.rb

@@ -0,0 +1,34 @@
+module GL
+  @programs = {}
+
+  class << self
+
+    def load_shaders
+      program_sources = {
+        text: ["text.v.glsl", "text.f.glsl"],
+        basic: ["basic.v.glsl", "basic.f.glsl"],
+        rect: ["rect.v.glsl", "basic.f.glsl"],
+      }
+
+      program_sources.each do |program, (v_src_fname, f_src_fname)|
+        v_src = Runtime.read(:shader, v_src_fname)
+        v_shader = GLShader.new(:vertex, v_src)
+        v_shader or raise "Could not find shader #{v_src_fname}"
+
+        f_src = Runtime.read(:shader, f_src_fname)
+        f_shader = GLShader.new(:fragment, f_src)
+        f_shader or raise "Could not find shader #{f_src_fname}"
+
+        uniforms = (v_src + f_src).lines.map do |line|
+          if line =~ /\buniform\s.*\s(\S+);/
+            $1
+          end
+        end.compact
+
+        @programs[program] = GLProgram.new(v_shader, f_shader,
+                                           uniforms: uniforms)
+      end
+    end
+
+  end
+end

runtime/lib/window.rb

@@ -1,6 +1,7 @@
 require "set"
 
 class Window
+
   include Widget
 
   @windows = Set.new
@@ -16,42 +17,12 @@ class Window
   end
 
   def initialize
-    super
-    @programs = {}
-    load_shaders
     Window.register(self)
+    super
   end
 
   def close
     Window.remove(self)
   end
 
-  private
-
-  def load_shaders
-    program_sources = {
-      text: ["text.v.glsl", "text.f.glsl"],
-      basic: ["basic.v.glsl", "basic.f.glsl"],
-      rect: ["rect.v.glsl", "basic.f.glsl"],
-    }
-
-    program_sources.each do |program, (v_src_fname, f_src_fname)|
-      v_src = Runtime.read(:shader, v_src_fname)
-      v_shader = GLShader.new(:vertex, v_src)
-      v_shader or raise "Could not find shader #{v_src_fname}"
-
-      f_src = Runtime.read(:shader, f_src_fname)
-      f_shader = GLShader.new(:fragment, f_src)
-      f_shader or raise "Could not find shader #{f_src_fname}"
-
-      uniforms = (v_src + f_src).lines.map do |line|
-        if line =~ /\buniform\s.*\s(\S+);/
-          $1
-        end
-      end.compact
-
-      @programs[program] = GLProgram.new(v_shader, f_shader,
-                                         uniforms: uniforms)
-    end
-  end
 end