okay maybe not

app/shaders/default.frag

@@ -0,0 +1,21 @@
+#version 150
+
+#ifdef GL_ES
+precision highp int;
+precision highp float;
+#endif
+
+// Input texture
+uniform sampler2D ove_maintex;
+
+// Input texture coordinate
+in vec2 ove_texcoord;
+
+// Output color
+out vec4 fragColor;
+
+void main() {
+    vec2 using_texcoord = ove_texcoord;
+    vec4 color = texture(ove_maintex, ove_texcoord);
+    fragColor = color;
+}