More work on loading screen

Multithreaded SceneGraphNode initialization

shaders/loadingscreen.frag

@@ -24,10 +24,11 @@
 
 #version __CONTEXT__
 
+in vec2 st;
 out vec4 FragColor;
 
-uniform vec4 color;
+uniform sampler2D logoTexture;
 
 void main() {
-    FragColor = color;
+    FragColor = texture(logoTexture, st);
 }

shaders/loadingscreen.vert

@@ -25,9 +25,11 @@
 #version __CONTEXT__
 
 in vec2 in_position;
+in vec2 in_st;
 
-uniform mat4 ortho;
+out vec2 st;
 
 void main() {
-    gl_Position = ortho * vec4(in_position, 0.0, 1.0);
+    gl_Position = vec4(in_position, 0.0, 1.0);
+    st = in_st;
 }