Stock

shaders/bg.frag

@@ -0,0 +1,14 @@
+# version 330 core
+
+layout (location = 0) out vec4 color;
+
+in DATA {
+    vec2 tc;
+} fs_in;
+
+uniform sampler2D tex;
+
+void main()
+{
+    color = texture(tex, fs_in.tc);
+}

shaders/bg.vert

@@ -0,0 +1,16 @@
+# version 330 core
+
+layout (location = 0) in vec4 position;
+layout (location = 2) in vec2 tc;
+
+uniform mat4 pr_matrix;
+
+out DATA {
+    vec2 tc;
+} vs_out;
+
+void main()
+{
+    gl_Position = pr_matrix * position;
+    vs_out.tc = tc;
+}