スマホでVR写真表示アプリを作る(Xamarin) - シェーダー

Controls.EquirectangularView.cs

this.VertexShader =
      "#version 300 es                                  \n" +
      "in vec4 position;                                \n" +
      "in vec2 texcoord;                                \n" +
      "out vec2 textureCoordinate;                      \n" +
      "uniform mat4 projection;                         \n" +
      "void main()                                      \n" +
      "{                                                \n" +
      "    gl_Position = projection * position;         \n" +
      "    textureCoordinate = texcoord;                \n" +
      "}                                                \n";

this.FragmentShader =
        "#version 300 es                                  \n" +
        "in highp vec2 textureCoordinate;                 \n" +
        "out lowp vec4 fragColor;                         \n" +
        "uniform lowp sampler2D text;                     \n" +
        "void main()                                      \n" +
        "{                                                \n" +
        "    fragColor = texture(text, textureCoordinate);\n" +
        "}                                                \n";