ANAGLYPH_JAPAN(
        R.drawable.mini,
        filter = AnaglyphFilter(greenFactor = 0.7f),
        colorRes = R.color.pack_none
),
ANAGLYPH_TOKYO(
        R.drawable.mini,
        filter = AnaglyphFilter(redFactor = 0.7f),
        colorRes = R.color.pack_none
),
ANAGLYPH_NOGANO(
        R.drawable.mini,
        filter = AnaglyphFilter(blueFactor = 0.7f),
        colorRes = R.color.pack_none
),
ANAGLYPH_KYOTO(
        R.drawable.mini,
        filter = AnaglyphFilter(redFactor = 0.7f, blueFactor = 0.7f),
        colorRes = R.color.pack_none
),
ANAGLYPH_FUJI(
        R.drawable.mini,
        filter = AnaglyphFilter(greenFactor = 0.5f, blueFactor = 0.5f),
        colorRes = R.color.pack_none
)


private const val VERTEX_SHADER = """
    attribute vec4 aPosition;
    attribute vec4 aTextureCoord;
    varying highp vec2 gbCoordinate;
    varying highp vec2 rCoordinate;

    uniform float imageWidthFactor;
    uniform float imageHeightFactor;

    void main() {
        gl_Position = aPosition;
        mediump vec2 offset = vec2( -imageWidthFactor, imageHeightFactor);
        gbCoordinate = aTextureCoord.xy;
        rCoordinate = aTextureCoord.xy + offset;
    }
"""

private val FRAGMENT_SHADER = """
    precision highp float;
    uniform lowp sampler2D sTexture;
    uniform mediump float redFactor;
    uniform mediump float greenFactor;
    uniform mediump float blueFactor;
    varying highp vec2 gbCoordinate;
    varying highp vec2 rCoordinate;

    void main() {
        gl_FragColor = vec4(texture2D(sTexture, rCoordinate).r * redFactor, texture2D(sTexture, gbCoordinate).g * greenFactor, texture2D(sTexture, gbCoordinate).b * blueFactor, 1.0);
    }
"""