1 files changed, 34 insertions, 0 deletions
diff --git a/src/renderergl2/glsl/down4x_fp.glsl b/src/renderergl2/glsl/down4x_fp.glsl
new file mode 100644
index 0000000..0f88fb2
--- /dev/null
+++ b/src/renderergl2/glsl/down4x_fp.glsl
@@ -0,0 +1,34 @@
+uniform sampler2D u_TextureMap;
+
+uniform vec2      u_InvTexRes;
+varying vec2      var_TexCoords;
+
+void main()
+{
+	vec4 color;
+	vec2 tc;
+	
+	tc = var_TexCoords + u_InvTexRes * vec2(-1.5, -1.5);  color  = texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2(-0.5, -1.5);  color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 0.5, -1.5);  color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 1.5, -1.5);  color += texture2D(u_TextureMap, tc);
+
+	tc = var_TexCoords + u_InvTexRes * vec2(-1.5, -0.5); color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2(-0.5, -0.5); color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 0.5, -0.5); color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 1.5, -0.5); color += texture2D(u_TextureMap, tc);
+
+	tc = var_TexCoords + u_InvTexRes * vec2(-1.5,  0.5); color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2(-0.5,  0.5); color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 0.5,  0.5); color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 1.5,  0.5); color += texture2D(u_TextureMap, tc);
+
+	tc = var_TexCoords + u_InvTexRes * vec2(-1.5,  1.5);  color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2(-0.5,  1.5);  color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 0.5,  1.5);  color += texture2D(u_TextureMap, tc);
+	tc = var_TexCoords + u_InvTexRes * vec2( 1.5,  1.5);  color += texture2D(u_TextureMap, tc);
+	
+	color *= 0.0625;
+	
+	gl_FragColor = color;
+}