Enum: Framebuffer Objects (Version15) [done!]

           // Old: void GL.Ext.GetFramebufferAttachmentParameter(All target, All attachment, All pname, out params);
            // New: void GL.Ext.GetFramebufferAttachmentParameter(FramebufferTarget target, FboAttachment attachment, FboPName pname, out params);

            // Old: All GL.Ext.CheckFramebufferStat(All target);
            // New: FBOErrorCode GL.Ext.CheckFramebufferStat(FramebufferTarget target);

            // note: these are 3 functions
            // Old: void GL.Ext.FramebufferTexture(1/2/3)D(All target, All attachment, All textarget, int texture, int level);
            // New: void GL.Ext.FramebufferTexture(1/2/3)D(FramebufferTarget target, FboAttachment attachment, TextureTarget textarget, int texture, int level);
            // using TextureTarget is a little errorprone, but avoids creating a new enum.

            // Old: void GL.Ext.FramebufferRenderbuffer(All target, All attachment, All renderbuffertarget, int renderbuffer);
            // New: void GL.Ext.FramebufferRenderbuffer(FramebufferTarget target, FboAttachment attachment, RenderbufferTarget renderbuffertarget, int renderbuffer);

            // Old: void GL.Ext.GetRenderbufferParameter(All target, All pname, out int params);
            // New: void GL.Ext.GetRenderbufferParameter(RenderbufferTarget target, RenderbufferPName pname, out int params);

            // Old: void GL.Ext.RenderbufferStorage(All target, All internalformat, int width, int height);
            // New: void GL.Ext.RenderbufferStorage(RenderbufferTarget target, RenderbufferStorage internalformat, int width, int height);

            // Old: void GL.Ext.BindFramebuffer(All target, int framebuffer);
            // New: void GL.Ext.BindFramebuffer(FramebufferTarget target, int framebuffer);

            // Old: void GL.Ext.BindRenderbuffer(All target, int renderbuffer);
            // New: void GL.Ext.BindRenderbuffer(RenderbufferTarget target, int renderbuffer);

            // Old: GL.Ext.GenerateMipmap(All target);
            // New: GL.Ext.GenerateMipmap(GenerateMipmapTarget target);

       // token values are same as in TextureTarget, but only these 4 are accepted by the func.
        public enum GenerateMipmapTarget : int
        {
            TEXTURE_1D,
            TEXTURE_2D,
            TEXTURE_CUBE_MAP,
            TEXTURE_3D,
        }
       
        public enum FramebufferTarget : int
        {
            FRAMEBUFFER_EXT = 0x8D40,
        }

        public enum RenderbufferTarget : int
        {
            RENDERBUFFER_EXT = 0x8D41,
        }

        public enum RenderbufferStorage : int
        {
            STENCIL_INDEX_EXT = 0x8D45, // from fbo-ext.h
            STENCIL_INDEX1_EXT = 0x8D46,
            STENCIL_INDEX4_EXT = 0x8D47,
            STENCIL_INDEX8_EXT = 0x8D48,
            STENCIL_INDEX16_EXT = 0x8D49,
        }

        public enum FBOErrorCode : int
        {
            FRAMEBUFFER_COMPLETE_EXT = 0x8CD5,
            FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT = 0x8CD6,
            FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT = 0x8CD7,
            FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT = 0x8CD8, // from fbo-ext.h
            FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT = 0x8CD9,
            FRAMEBUFFER_INCOMPLETE_FORMATS_EXT = 0x8CDA,
            FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT = 0x8CDB,
            FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT = 0x8CDC,
            FRAMEBUFFER_UNSUPPORTED_EXT = 0x8CDD,
            FRAMEBUFFER_STATUS_ERROR_EXT = 0x8CDE, // from fbo-ext.h
        }

        public enum FboAttachment : int
        {
            COLOR_ATTACHMENT0_EXT = 0x8CE0,
            COLOR_ATTACHMENT1_EXT = 0x8CE1,
            COLOR_ATTACHMENT2_EXT = 0x8CE2,
            COLOR_ATTACHMENT3_EXT = 0x8CE3,
            COLOR_ATTACHMENT4_EXT = 0x8CE4,
            COLOR_ATTACHMENT5_EXT = 0x8CE5,
            COLOR_ATTACHMENT6_EXT = 0x8CE6,
            COLOR_ATTACHMENT7_EXT = 0x8CE7,
            COLOR_ATTACHMENT8_EXT = 0x8CE8,
            COLOR_ATTACHMENT9_EXT = 0x8CE9,
            COLOR_ATTACHMENT10_EXT = 0x8CEA,
            COLOR_ATTACHMENT11_EXT = 0x8CEB,
            COLOR_ATTACHMENT12_EXT = 0x8CEC,
            COLOR_ATTACHMENT13_EXT = 0x8CED,
            COLOR_ATTACHMENT14_EXT = 0x8CEE,
            COLOR_ATTACHMENT15_EXT = 0x8CEF,
            DEPTH_ATTACHMENT_EXT = 0x8D00,
            STENCIL_ATTACHMENT_EXT = 0x8D20,
        }

        public enum FboPName : int
        {
            FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT = 0x8CD0,
            FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT = 0x8CD1,
            FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT = 0x8CD2,
            FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT = 0x8CD3,
            FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT = 0x8CD4,
        }

        public enum RenderbufferPName : int
        {
            RENDERBUFFER_WIDTH_EXT = 0x8D42,
            RENDERBUFFER_HEIGHT_EXT = 0x8D43,
            RENDERBUFFER_INTERNAL_FORMAT_EXT = 0x8D44,
            RENDERBUFFER_RED_SIZE_EXT = 0x8D50,
            RENDERBUFFER_GREEN_SIZE_EXT = 0x8D51,
            RENDERBUFFER_BLUE_SIZE_EXT = 0x8D52,
            RENDERBUFFER_ALPHA_SIZE_EXT = 0x8D53,
            RENDERBUFFER_DEPTH_SIZE_EXT = 0x8D54,
            RENDERBUFFER_STENCIL_SIZE_EXT = 0x8D55,
        }

// add to Enum: GetPName
           
FRAMEBUFFER_BINDING_EXT             0x8CA6
RENDERBUFFER_BINDING_EXT            0x8CA7
MAX_COLOR_ATTACHMENTS_EXT           0x8CDF
MAX_RENDERBUFFER_SIZE_EXT           0x84E8
         
// add to Enum: ErrorCode
             
INVALID_FRAMEBUFFER_OPERATION_EXT   0x0506