add missing shaders

shaders/celestial.frag

@@ -0,0 +1,25 @@
+in vec2 f_coord;
+
+#texture (tex1, 0, sRGB_A)
+uniform sampler2D tex1;
+
+#include <common>
+#include <tonemapping.glsl>
+
+layout(location = 0) out vec4 out_color;
+#if MOTIONBLUR_ENABLED
+layout(location = 1) out vec4 out_motion;
+#endif
+
+void main()
+{
+	vec4 tex_color = texture(tex1, f_coord);
+#if POSTFX_ENABLED
+	out_color = tex_color * param[0];
+#else
+    out_color = tonemap(tex_color * param[0]);
+#endif
+#if MOTIONBLUR_ENABLED
+	out_motion = vec4(0.0f);
+#endif
+}

shaders/celestial.vert

@@ -0,0 +1,28 @@
+const vec2 vert[4] = vec2[]
+(
+  vec2(-1.0,  1.0),
+  vec2(-1.0, -1.0),
+  vec2( 1.0,  1.0),
+  vec2( 1.0, -1.0)
+);
+
+out vec2 f_coord;
+
+#include <common>
+
+void main()
+{
+	gl_Position = projection * (vec4(param[1].xyz, 1.0) + vec4(vert[gl_VertexID] * param[1].w, 0.0, 0.0));
+
+	vec2 coord = param[2].xy;
+	float size = param[2].z;
+
+	if (gl_VertexID == 0)
+		f_coord = vec2(coord.x, coord.y);
+	if (gl_VertexID == 1)
+		f_coord = vec2(coord.x, coord.y - size);
+	if (gl_VertexID == 2)
+		f_coord = vec2(coord.x + size, coord.y);
+	if (gl_VertexID == 3)
+		f_coord = vec2(coord.x + size, coord.y - size);
+}