libgender/shader.h

#ifndef SHADER_H
#define SHADER_H

#include <cassert>

#include <map>
#include <sstream>

#include "opengl.h"
#include "util.h"

namespace shader {

  using namespace std;

  const int NAMELEN = 32;

  template<class T>
  struct sl_expr {
    const T t;
    sl_expr (const T &t) : t(t) { }
    void operator ()() const { t (); }
    template<typename expr>
    const sl_expr &operator =(const expr &e) const;
  };

  template<class A, class B>
  struct sl_concat2
  {
    const A a; const B b;
    sl_concat2 (const A &a, const B &b) : a(a), b(b) { }
    void operator ()() const { a (); b (); }
  };

  template<class A, class B, class C>
  struct sl_concat3
  {
    const A a; const B b; const C c;
    sl_concat3 (const A &a, const B &b, const C &c) : a(a), b(b), c(c) { }
    void operator ()() const { a (); b (); c (); }
  };

  template<class A, class B, class C, class D>
  struct sl_concat4
  {
    const A a; const B b; const C c; const D d;
    sl_concat4 (const A &a, const B &b, const C &c, const D &d) : a(a), b(b), c(c), d(d) { }
    void operator ()() const { a (); b (); c (); d(); }
  };

  struct sl_func0
  {
    const char *name_par;
    sl_func0 (const char *name_par) : name_par(name_par) { }
    void begin () const;
    void comma () const;
    void end () const;
    void operator ()() const
    { 
      begin ();
      end ();
    }
  };

  template<class A>
  struct sl_func1 : sl_func0
  {
    const A a;
    sl_func1 (const char *name, const A &a) : sl_func0(name), a(a) { }
    void operator ()() const { begin (); a (); end (); }
  };

  template<class A, class B>
  struct sl_func2 : sl_func0
  {
    const A a; const B b;
    sl_func2 (const char *name, const A &a, const B &b) : sl_func0(name), a(a), b(b) { }
    void operator ()() const { begin (); a (); comma (); b (); end (); }
  };

  template<class A, class B, class C>
  struct sl_func3 : sl_func0
  {
    const A a; const B b; const C c;
    sl_func3 (const char *name, const A &a, const B &b, const C &c) : sl_func0(name), a(a), b(b), c(c) { }
    void operator ()() const { begin (); a (); comma (); b (); comma (); c (); end (); }
  };

  template<class A, class B, class C, class D>
  struct sl_func4 : sl_func0
  {
    const A a; const B b; const C c; const D d;
    sl_func4 (const char *name, const A &a, const B &b, const C &c, const D &d) : sl_func0(name), a(a), b(b), c(c), d(d) { }
    void operator ()() const { begin (); a (); comma (); b (); comma (); c (); comma (); d(); end (); }
  };

  class refcounted
  {
    template<class type> friend class ref;
    mutable int refcnt;
    void refcnt_inc () const { refcnt++; }
    void refcnt_dec () const;
  public:
    refcounted () : refcnt(0) { }
    virtual ~refcounted ();
  };

  template<class type>
  struct ref
  {
    type *p;

    ref ()
    {
      p = new type;
      p->refcnt_inc ();
    }

    ref (type &d)
    {
      d.refcnt_inc ();
      p = &d;
    }

    ref (const ref &r)
    {
      r.p->refcnt_inc ();
      p = r.p;
    }

    template<class type2>
    ref (const ref<type2> &r)
    {
      r.p->refcnt_inc ();
      p = r.p;
    }

    ~ref ()
    {
      p->refcnt_dec ();
    }

    ref &operator =(type &d)
    {
      d.refcnt_inc ();
      p->refcnt_dec ();
      p = &d;
      return *this;
    }

    type *operator ->() const { return p; }

    operator type &() const { return *p; }

    template<class type2>
    bool operator ==(const ref<type2> b) const
    {
      return (void *)p == (void *)b.p;
    }
  };
  
  // ref with auto-construct
  template<class type>
  struct auto_ref0 : ref<type>
  {
    auto_ref0 () : ref<type> (*new type ()) { }
  };

  template<class type, typename arg1>
  struct auto_ref1 : ref<type>
  {
    auto_ref1 (arg1 a) : ref<type> (*new type (a)) { }
  };

  template<class type>
  struct auto_lvalue_ref0 : ref<type>
  {
    auto_lvalue_ref0 () : ref<type> (*new type ()) { }
    template<typename expr>
    const auto_lvalue_ref0 &operator =(const expr &e) const;
  };

  template<class type, typename arg1>
  struct auto_lvalue_ref1 : ref<type>
  {
    auto_lvalue_ref1 (arg1 a) : ref<type> (*new type (a)) { }
    template<class expr>
    const auto_lvalue_ref1 &operator =(const expr &e) const;
  };

  extern const char str_float [];
  extern const char str_vec2  [];
  extern const char str_vec3  [];
  extern const char str_vec4  [];
  extern const char str_mat2  [];
  extern const char str_mat3  [];
  extern const char str_mat4  [];

  extern const char str_sampler_1d             [];
  extern const char str_sampler_1d_shadow      [];
  extern const char str_sampler_2d             [];
  extern const char str_sampler_2d_shadow      [];
  extern const char str_sampler_2d_rect        [];
  extern const char str_sampler_2d_rect_shadow [];
  extern const char str_sampler_3d             [];
  extern const char str_sampler_3d_rect        [];
  extern const char str_sampler_cube           [];

  typedef ref<struct var_i> var;
  typedef ref<struct uniform_i> uniform;

  struct shader_builder
  {
    vector<var> refs; // uniform/varying parameters
    vector<var> temps; // temporary variables

    ostringstream source;

    template<typename type>
    shader_builder &operator <<(const type &t)
    {
      source << t;
      return *this;
    }
  };

  struct fragment_i : refcounted
  {
    virtual void build (shader_builder &b) = 0;
  };

  typedef ref<fragment_i> fragment;

  struct lvalue_i : fragment_i
  {
  };

  // a simple predeclared variable with unspecified type
  struct gluvar_i : lvalue_i
  {
    const char *name;
    void build (shader_builder &b);
    gluvar_i (const char *name) : name (name) { }
  };

  typedef auto_lvalue_ref1<gluvar_i, const char *> gluvar;

  struct var_i : lvalue_i
  {
    static unsigned int next_id;

    char name[NAMELEN];
    const char *typestr;

    void build (shader_builder &b);
    virtual void build_decl (ostringstream &b);

    var_i (const char *typestr);
    ~var_i ();
  };

  struct uniform_i : var_i
  {
    void build (shader_builder &b);
    void build_decl (ostringstream &b);

    GLint location ();

    uniform_i (const char *strtype);
  };

  template<int dimension, typename gltype, const char *strtype>
  struct uniform2_i : uniform_i
  {
    gltype data[dimension];

    uniform2_i () : uniform_i (strtype) { }
  };

  template<int dimension, const char *strtype>
  struct uniform_f_i : uniform2_i<dimension, GLfloat, strtype>
  {
  };

  struct uniform_1f_i : uniform_f_i<1, str_float> {
    void set (GLfloat v)
    {
      data[0] = v;

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniform1fvARB (loc, 1, data);
    }
  };

  struct uniform_2f_i : uniform_f_i<2, str_vec2> {
    void set (GLfloat x, GLfloat y)
    {
      data[0] = x;
      data[1] = y;

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniform2fvARB (loc, 1, data);
    }

    void set (const vec2 &v) { set (v.x, v.y); }
  };

  struct uniform_3f_i : uniform_f_i<3, str_vec3> {
    void set (GLfloat x, GLfloat y, GLfloat z)
    {
      data[0] = x;
      data[1] = y;
      data[2] = z;

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniform3fvARB (loc, 1, data);
    }

    void set (const vec3 &v) { set (v.x, v.y, v.z); }
  };

  struct uniform_4f_i : uniform_f_i<4, str_vec4> {
    void set (GLfloat x, GLfloat y, GLfloat z, GLfloat w)
    {
      data[0] = x;
      data[1] = y;
      data[2] = z;
      data[3] = w;

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniform4fvARB (loc, 1, data);
    }

    void set (const vec4 &v) { set (v.x, v.y, v.z, v.w); }
  };

  struct uniform_matrix_2f_i : uniform_f_i< 4, str_mat2>
  {
    void set (const GLfloat d[4])
    {
      memcpy (data, d, 4 * sizeof (GLfloat));

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniformMatrix2fvARB (loc, 1, 0, data);
    }
  };

  struct uniform_matrix_3f_i : uniform_f_i< 9, str_mat3>
  {
    void set (const GLfloat d[9])
    {
      memcpy (data, d, 9 * sizeof (GLfloat));

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniformMatrix3fvARB (loc, 1, 0, data);
    }
  };

  struct uniform_matrix_4f_i : uniform_f_i<16, str_mat4>
  {
    void set (const gl::matrix &m)
    {
      memcpy (data, m.data, 16 * sizeof (GLfloat));

      GLint loc = location ();
      if (loc >= 0) // workaround for buggy drivers
        glUniformMatrix4fvARB (loc, 1, 0, data);
    }
  };

  template<class var_i>
  struct var_ref : ref<var_i>
  {
    var_ref (const char *glname = 0)
    : ref<var_i> (*new var_i)
    {
      if (glname)
        strcpy ((*this)->name, glname);
    }
  };

  typedef var_ref<uniform_1f_i> uniform_1f;
  typedef var_ref<uniform_2f_i> uniform_2f;
  typedef var_ref<uniform_3f_i> uniform_3f;
  typedef var_ref<uniform_4f_i> uniform_4f;
  typedef var_ref<uniform_matrix_2f_i> uniform_matrix_2f;
  typedef var_ref<uniform_matrix_3f_i> uniform_matrix_3f;
  typedef var_ref<uniform_matrix_4f_i> uniform_matrix_4f;

#if 0
  // to be used for attributes

  struct stream_i : var_i
  {
    void build (shader_builder &b);
    void build_decl (ostringstream &b);
    stream_i (const char *strtype);
  };

  template<int dimension, GLenum gltype, const char *strtype>
  struct varying_i : stream_i
  {
    varying_i () : stream_i (strtype) { }

    void set (GLsizei stride, GLvoid *ptr)
    {
      //cgGLSetParameterPointer (param, dimension, gltype, stride, ptr);
    }
  };

  template<int dimension, const char *strtype>
  struct varying_f_i : varying_i<dimension, GL_FLOAT, strtype>
  {
    void set (const gl::vertex_buffer &vb, GLint offset)
    {
      varying_i<dimension, GL_FLOAT, strtype>::set (gl::format_stride (vb.format), (GLvoid *)(long)offset);
    }
  };

  struct varying_1f_i : varying_f_i<1, str_float>
  {
  };

  struct varying_2f_i : varying_f_i<2, str_vec2>
  {
    void set_t (const gl::vertex_buffer &vb)
    {
      set (vb, gl::format_offset_t (vb.format));
    }
  };

  struct varying_3f_i : varying_f_i<3, str_vec3>
  {
    void set_p (const gl::vertex_buffer &vb)
    {
      set (vb, gl::format_offset_p (vb.format));
    }

    void set_n (const gl::vertex_buffer &vb)
    {
      set (vb, gl::format_offset_n (vb.format));
    }
  };

  struct varying_4f_i : varying_f_i<4, str_vec4>
  {
  };

  typedef var_ref<varying_1f_i> varying_1f;
  typedef var_ref<varying_2f_i> varying_2f;
  typedef var_ref<varying_3f_i> varying_3f;
  typedef var_ref<varying_4f_i> varying_4f;
#endif

  struct varying_i : var_i
  {
    void build_decl (ostringstream &b);
    void build (shader_builder &b);
    varying_i (const char *strtype);
  };

  struct temporary_i : var_i
  {
    void build (shader_builder &b);
    temporary_i (const char *strtype);
  };

  template<const char *strtype, class var_i>
  struct glnvar_ref : ref<var_i>
  {
    glnvar_ref ()
    : ref<var_i> (*new var_i (strtype))
    {
    }

#if 0
    template<typename expr>
    glnvar_ref (const expr &e)
    : ref<temporary_i> (*new temporary_i (strtype))
    {
      (*this) = e;
    }
#endif

    template<typename expr>
    const glnvar_ref &operator =(const expr &e) const;
  };

  typedef glnvar_ref<str_float, temporary_i> temp_1f;
  typedef glnvar_ref<str_vec2,  temporary_i> temp_2f;
  typedef glnvar_ref<str_vec3,  temporary_i> temp_3f;
  typedef glnvar_ref<str_vec4,  temporary_i> temp_4f;
  typedef glnvar_ref<str_mat2,  temporary_i> temp_matrix_2f;
  typedef glnvar_ref<str_mat3,  temporary_i> temp_matrix_3f;
  typedef glnvar_ref<str_mat4,  temporary_i> temp_matrix_4f;

  typedef glnvar_ref<str_float, varying_i> varying_1f;
  typedef glnvar_ref<str_vec2,  varying_i> varying_2f;
  typedef glnvar_ref<str_vec3,  varying_i> varying_3f;
  typedef glnvar_ref<str_vec4,  varying_i> varying_4f;
  typedef glnvar_ref<str_mat2,  varying_i> varying_matrix_2f;
  typedef glnvar_ref<str_mat3,  varying_i> varying_matrix_3f;
  typedef glnvar_ref<str_mat4,  varying_i> varying_matrix_4f;

  struct texture_units
  {
    static int units[8];
    static int unit_count;

    static GLenum get_texture_unit ()
    {
      assert (unit_count);
      return units[--unit_count];
    }

    static void put_texture_unit (GLenum unit)
    {
      assert (unit_count < 8);
      units[unit_count++] = unit;
    }
  };

  template<GLenum gltype, const char *strtype>
  struct sampler_i : uniform_i, texture_units
  {
    int unit;
    GLuint name;

    void enable ()
    {
#if DEBUG
      assert (unit < 0);
#endif
      GLint loc = location ();

      if (loc >= 0)
        {
          unit = get_texture_unit ();
          glActiveTexture (GL_TEXTURE0 + unit);
          glBindTexture (gltype, name);
          glUniform1iARB (loc, unit);
        }
    }

    void disable ()
    {
      if (unit >= 0)
        {
          put_texture_unit (unit);
          unit = -1;
        }
    }

    template<class bufferclass, class vectype>
    void set (const gl::vertex_buffer &vb, const vectype bufferclass::*vp)
    {
      glTexCoordPointer (
        vector_traits<vectype>::dimension (),
        gl::type_traits<typename vector_traits<vectype>::basetype>::glenum (),
        sizeof (bufferclass),
        (GLvoid)(char bufferclass::*)vp
      );
    }

    sampler_i (GLuint texture)
    : uniform_i (strtype)
    , name (texture)
#if DEBUG
    , unit (-1)
#endif
    {
    }
  };

  struct sampler_1d_i : sampler_i<GL_TEXTURE_1D, str_sampler_1d>
  {
    sampler_1d_i (GLuint texture) : sampler_i<GL_TEXTURE_1D, str_sampler_1d> (texture) { }
  };

  struct sampler_1d_shadow_i : sampler_i<GL_TEXTURE_1D, str_sampler_1d_shadow>
  {
    sampler_1d_shadow_i (GLuint texture) : sampler_i<GL_TEXTURE_1D, str_sampler_1d_shadow> (texture) { }
  };

  struct sampler_2d_i : sampler_i<GL_TEXTURE_2D, str_sampler_2d>
  {
    sampler_2d_i (GLuint texture) : sampler_i<GL_TEXTURE_2D, str_sampler_2d> (texture) { }
  };

  struct sampler_2d_shadow_i : sampler_i<GL_TEXTURE_2D, str_sampler_2d_shadow>
  {
    sampler_2d_shadow_i (GLuint texture) : sampler_i<GL_TEXTURE_2D, str_sampler_2d_shadow> (texture) { }
  };

  struct sampler_2d_rect_i : sampler_i<GL_TEXTURE_2D, str_sampler_2d_rect>
  {
    sampler_2d_rect_i (GLuint texture) : sampler_i<GL_TEXTURE_2D, str_sampler_2d_rect> (texture) { }
  };

  struct sampler_2d_rect_shadow_i : sampler_i<GL_TEXTURE_2D, str_sampler_2d_rect_shadow>
  {
    sampler_2d_rect_shadow_i (GLuint texture) : sampler_i<GL_TEXTURE_2D, str_sampler_2d_rect_shadow> (texture) { }
  };

  struct sampler_3d_i : sampler_i<GL_TEXTURE_3D, str_sampler_3d>
  {
    sampler_3d_i (GLuint texture) : sampler_i<GL_TEXTURE_3D, str_sampler_3d> (texture) { }
  };

  struct sampler_3d_rect_i : sampler_i<GL_TEXTURE_3D, str_sampler_3d_rect>
  {
    sampler_3d_rect_i (GLuint texture) : sampler_i<GL_TEXTURE_3D, str_sampler_3d_rect> (texture) { }
  };

  struct sampler_cube_i : sampler_i<GL_TEXTURE_CUBE_MAP, str_sampler_cube>
  {
    sampler_cube_i (GLuint texture) : sampler_i<GL_TEXTURE_CUBE_MAP, str_sampler_cube> (texture) { }
  };

  template<class sampler_i>
  struct sampler_ref : auto_ref1<sampler_i, GLuint>
  {
    sampler_ref (GLuint texture)
    : auto_ref1<sampler_i, GLuint> (texture)
    {
    }
  };

  typedef sampler_ref<sampler_1d_i>             sampler_1d;
  typedef sampler_ref<sampler_1d_shadow_i>      sampler_1d_shadow;
  typedef sampler_ref<sampler_2d_i>             sampler_2d;
  typedef sampler_ref<sampler_2d_shadow_i>      sampler_2d_shadow;
  typedef sampler_ref<sampler_2d_rect_i>        sampler_2d_rect;
  typedef sampler_ref<sampler_2d_rect_shadow_i> sampler_2d_rect_shadow;
  typedef sampler_ref<sampler_3d_i>             sampler_3d;
  typedef sampler_ref<sampler_3d_rect_i>        sampler_3d_rect;
  typedef sampler_ref<sampler_cube_i>           sampler_cube;

  struct fragment_const_string_i : fragment_i
  {
    const char *str;

    void build (shader_builder &b);

    fragment_const_string_i (const char *str) : str(str) { }
  };

  typedef auto_ref1<fragment_const_string_i, const char *> fragment_const_string;

  struct fragment_string_i : fragment_i
  {
    char *str;

    void build (shader_builder &b);

    fragment_string_i (const char *str) : str (strdup (str)) { }
    ~fragment_string_i ();
  };

  struct fragment_vector_i : fragment_i, vector<fragment>
  {
    void build (shader_builder &b);

    template<class fragment_i>
    void append (const ref<fragment_i> &f)
    {
      push_back (f);
    }

    template<class expr>
    void append (const sl_expr<expr> &e)
    {
      e ();
    }

    void append_const (const char *s)
    {
      push_back (*new fragment_const_string_i (s));
    }

    void append_string (const char *s)
    {
      push_back (*new fragment_string_i (s));
    }
  };

  typedef ref<fragment_vector_i> fragment_vector;

  struct shader_object_i : fragment_vector_i
  {
    GLenum type;
    GLuint id; // GLhandleARB, but 2.0 will use uint

    string source ();
    void compile ();
    void start ();
    void stop ();

    shader_object_i (GLenum type);
    ~shader_object_i ();
  };

  extern shader_object_i *cur; // record actions to this shader

  template<GLenum type>
  struct shader_object : ref<shader_object_i>
  {
    shader_object ()
    : ref<shader_object_i> (*new shader_object_i (type))
    {
    }
  };

  typedef shader_object<GL_VERTEX_SHADER_ARB>   vertex_shader;
  typedef shader_object<GL_FRAGMENT_SHADER_ARB> fragment_shader;

  struct program_object
  {
    static struct program_object *cur; // currently bound program

    GLuint id;

    vertex_shader   vsh;
    fragment_shader fsh;

    map<uniform_i *,GLint> uloc; // uniform location

    program_object ();
    ~program_object ();

    void link ();

    void enable ();
    void disable ();
  };

  template<typename T>
  struct sl_append
  {
    T t;

    sl_append (const T &t) : t(t) { }

    void operator ()() const
    {
      cur->push_back (t);
    }
  };

  template<int length>
  struct sl_string
  {
    char str[length];

    void operator ()() const
    {
      cur->push_back (*new fragment_string_i (str));
    }
  };

  struct sl_float
  {
    const GLfloat c;

    sl_float (GLfloat c) : c(c) { }

    void operator ()() const;
  };

  template<class A, class B>
  inline sl_expr< sl_concat2<A, B> >
  concat (const A &a, const B &b)
  {
    typedef sl_concat2<A, B> expr;
    return sl_expr<expr> (expr (a, b));
  }

  template<class A, class B, class C>
  inline sl_expr< sl_concat3<A, B, C> >
  concat (const A &a, const B &b, const C &c)
  {
    typedef sl_concat3<A, B, C> expr;
    return sl_expr<expr> (expr (a, b, c));
  }

  template<class A, class B, class C, class D>
  inline sl_expr< sl_concat4<A, B, C, D> >
  concat (const A &a, const B &b, const C &c, const D &d)
  {
    typedef sl_concat4<A, B, C, D> expr;
    return sl_expr<expr> (expr (a, b, c, d));
  }

  template<typename expr>
  struct sl_convert
  {
    typedef sl_expr<expr> T;
    static inline const T &convert (const T &e)
    {
      return e;
    }
  };

  template<>
  struct sl_convert<GLfloat>
  {
    typedef sl_expr<sl_float> T;
    static inline const T convert (GLfloat f)
    {
      return sl_float (f);
    }
  };

  template<>
  struct sl_convert<GLdouble>
  {
    typedef sl_expr<sl_float> T;
    static inline const T convert (GLdouble d)
    {
      return sl_float (d);
    }
  };

  template<>
  struct sl_convert<GLint>
  {
    typedef sl_expr<sl_float> T;
    static inline const T convert (GLint i)
    {
      return sl_float (i);
    }
  };

  template<>
  struct sl_convert<vec2>
  {  
    typedef sl_expr< sl_string<60> > T;
    static const T convert (const vec2 &v);
  };

  template<>
  struct sl_convert<vec3>
  {  
    typedef sl_expr< sl_string<80> > T;
    static const T convert (const vec3 &v);
  };

  template<>
  struct sl_convert<vec4>
  {  
    typedef sl_expr< sl_string<100> > T;
    static const T convert (const vec4 &v);
  };

  template<>
  template<class V>
  struct sl_convert< var_ref<V> >
  {
    typedef sl_expr< sl_append< var_ref<V> > > T;
    static inline const T convert (const var_ref<V> &v)
    {
      return sl_append< var_ref<V> > (v);
    }
  };

  template<>
  struct sl_convert<gluvar>
  {
    typedef sl_expr< sl_append<gluvar> > T;
    static inline const T convert (const gluvar &v)
    {
      return sl_append<gluvar> (v);
    }
  };

  template<>
  template<const char *strtype, class var_i>
  struct sl_convert< glnvar_ref<strtype, var_i> >
  {
    typedef sl_expr< sl_append< glnvar_ref<strtype, var_i> > > T;
    static inline const T convert (const glnvar_ref<strtype, var_i> &v)
    {
      return sl_expr< sl_append< glnvar_ref<strtype, var_i> > >(
               sl_append< glnvar_ref<strtype, var_i> > (v)
             );
    }
  };

  template<>
  template<class sampler_i>
  struct sl_convert< sampler_ref<sampler_i> >
  {
    typedef sl_expr< sl_append< sampler_ref<sampler_i> > > T;
    static inline const T convert (const sampler_ref<sampler_i> &v)
    {
      return sl_append< sampler_ref<sampler_i> > (v);
    }
  };

  namespace compile {
    extern const fragment_const_string str_2sp;
    extern const fragment_const_string str_equal;
    extern const fragment_const_string str_comma;
    extern const fragment_const_string str_endl;

    template<class fragment, typename expr>
    inline void sl_assign (const fragment &f, const expr &e)
    {
      cur->append (str_2sp);
      cur->append (f);
      cur->append (str_equal);
      sl_convert<expr>::convert (e) ();
      cur->append (str_endl);
    }
  }

  template<class type>
  template<typename expr>
  inline const auto_lvalue_ref0<type> &auto_lvalue_ref0<type>::operator =(const expr &e) const
  {
    compile::sl_assign (*this, e);
    return *this;
  }

  template<class type, typename arg1>
  template<typename expr>
  inline const auto_lvalue_ref1<type,arg1> &auto_lvalue_ref1<type,arg1>::operator =(const expr &e) const
  {
    compile::sl_assign (*this, e);
    return *this;
  }

  template<class T>
  template<typename expr>
  inline const sl_expr<T> &sl_expr<T>::operator =(const expr &e) const
  {
    compile::sl_assign (*this, e);
    return *this;
  }

  template<const char *strtype, class var_i>
  template<typename expr>
  inline const glnvar_ref<strtype, var_i> &glnvar_ref<strtype, var_i>::operator =(const expr &e) const
  {
    compile::sl_assign (*this, e);
    return *this;
  }

  struct sl_append_const_string
  {
    fragment_const_string str;
    sl_append_const_string (const char *s)
    : str (s)
    { }

    void operator ()() const
    {
      cur->push_back (str);
    }
  };

  namespace compile {
    extern const sl_append_const_string str_lpar;
    extern const sl_append_const_string str_rpar;
    extern const sl_append_const_string str_minus;

    using namespace shader;

    template<typename T>
    inline const sl_expr< sl_func1<typename sl_convert<T>::T> >
    operator +(const T &t)
    {
      return sl_func1<typename sl_convert<T>::T> ("+(", sl_convert<T>::convert (t));
    }

    template<typename T>
    inline const sl_expr< sl_func1<typename sl_convert<T>::T> >
    operator -(const T &t)
    {
      return sl_func1<typename sl_convert<T>::T> ("-(", sl_convert<T>::convert (t));
    }

    template<class A, class B, class C>
    struct sl_binop
    {
      const A a; const B b; const C c;
      sl_binop (const A &a, const B &b, const C &c) : a(a), b(b), c(c) { }
      void operator ()() const { str_lpar (); a (); b (); c (); str_rpar (); }
    };

#   define SHADER_BINOP(op, str)                                        \
      extern const sl_append_const_string str_ ## str;                  \
      template<typename A, typename B>                                  \
      inline const sl_expr< sl_binop< typename sl_convert<A>::T,        \
                                      sl_append_const_string,           \
                                      typename sl_convert<B>::T > >     \
      operator op(const A &a, const B &b)                               \
      {                                                                 \
        return sl_binop< typename sl_convert<A>::T, sl_append_const_string, typename sl_convert<B>::T > \
               (sl_convert<A>::convert (a), str_ ## str, sl_convert<B>::convert (b));   \
      }

    SHADER_BINOP (+, plus);
    SHADER_BINOP (-, minus);
    SHADER_BINOP (*, mul);
    SHADER_BINOP (/, div);
    SHADER_BINOP (%, mod);

    SHADER_BINOP (<,  lt);
    SHADER_BINOP (<=, lte);
    SHADER_BINOP (==, eq);
    SHADER_BINOP (!=, ne);
    SHADER_BINOP (>=, gte);
    SHADER_BINOP (>,  gt);

#   undef SHADER_BINOP

    void swizzle_mask (sl_string<7> &s, int mask);

    template<typename T>
    inline const sl_expr< sl_concat3< sl_append_const_string,
                                      typename sl_convert<T>::T,
                                      sl_string<7>
                 > >
    swizzle (const T &t, int a, int b = 0, int c = 0, int d = 0)
    {
      sl_string<7> s;
      swizzle_mask (s, ((d * 5 + c) * 5 + b) * 5 + a);
      return concat (str_lpar, sl_convert<T>::convert (t), s);
    }

#   define SHADER_SWIZZLE_OP(abcd,type) \
      template<typename T>                                              \
      inline const sl_expr< sl_concat3< sl_append_const_string,         \
                                        typename sl_convert<T>::T,      \
                                        sl_string<7>                    \
                   > >                                                  \
      type (const T &t)                                                 \
      {                                                                 \
        return swizzle (t, (abcd / 1000) % 5, (abcd / 100) % 5, (abcd / 10) % 5, (abcd / 1) % 5);       \
      }

    // brute force is lovely, ain't it?
    SHADER_SWIZZLE_OP (1   , x   ) SHADER_SWIZZLE_OP (11  , xx  ) SHADER_SWIZZLE_OP (111 , xxx ) SHADER_SWIZZLE_OP (1111, xxxx)
    SHADER_SWIZZLE_OP (1112, xxxy) SHADER_SWIZZLE_OP (1113, xxxz) SHADER_SWIZZLE_OP (1114, xxxw) SHADER_SWIZZLE_OP (112 , xxy )
    SHADER_SWIZZLE_OP (1121, xxyx) SHADER_SWIZZLE_OP (1122, xxyy) SHADER_SWIZZLE_OP (1123, xxyz) SHADER_SWIZZLE_OP (1124, xxyw)
    SHADER_SWIZZLE_OP (113 , xxz ) SHADER_SWIZZLE_OP (1131, xxzx) SHADER_SWIZZLE_OP (1132, xxzy) SHADER_SWIZZLE_OP (1133, xxzz)
    SHADER_SWIZZLE_OP (1134, xxzw) SHADER_SWIZZLE_OP (114 , xxw ) SHADER_SWIZZLE_OP (1141, xxwx) SHADER_SWIZZLE_OP (1142, xxwy)
    SHADER_SWIZZLE_OP (1143, xxwz) SHADER_SWIZZLE_OP (1144, xxww) SHADER_SWIZZLE_OP (12  , xy  ) SHADER_SWIZZLE_OP (121 , xyx )
    SHADER_SWIZZLE_OP (1211, xyxx) SHADER_SWIZZLE_OP (1212, xyxy) SHADER_SWIZZLE_OP (1213, xyxz) SHADER_SWIZZLE_OP (1214, xyxw)
    SHADER_SWIZZLE_OP (122 , xyy ) SHADER_SWIZZLE_OP (1221, xyyx) SHADER_SWIZZLE_OP (1222, xyyy) SHADER_SWIZZLE_OP (1223, xyyz)
    SHADER_SWIZZLE_OP (1224, xyyw) SHADER_SWIZZLE_OP (123 , xyz ) SHADER_SWIZZLE_OP (1231, xyzx) SHADER_SWIZZLE_OP (1232, xyzy)
    SHADER_SWIZZLE_OP (1233, xyzz) SHADER_SWIZZLE_OP (1234, xyzw) SHADER_SWIZZLE_OP (124 , xyw ) SHADER_SWIZZLE_OP (1241, xywx)
    SHADER_SWIZZLE_OP (1242, xywy) SHADER_SWIZZLE_OP (1243, xywz) SHADER_SWIZZLE_OP (1244, xyww) SHADER_SWIZZLE_OP (13  , xz  )
    SHADER_SWIZZLE_OP (131 , xzx ) SHADER_SWIZZLE_OP (1311, xzxx) SHADER_SWIZZLE_OP (1312, xzxy) SHADER_SWIZZLE_OP (1313, xzxz)
    SHADER_SWIZZLE_OP (1314, xzxw) SHADER_SWIZZLE_OP (132 , xzy ) SHADER_SWIZZLE_OP (1321, xzyx) SHADER_SWIZZLE_OP (1322, xzyy)
    SHADER_SWIZZLE_OP (1323, xzyz) SHADER_SWIZZLE_OP (1324, xzyw) SHADER_SWIZZLE_OP (133 , xzz ) SHADER_SWIZZLE_OP (1331, xzzx)
    SHADER_SWIZZLE_OP (1332, xzzy) SHADER_SWIZZLE_OP (1333, xzzz) SHADER_SWIZZLE_OP (1334, xzzw) SHADER_SWIZZLE_OP (134 , xzw )
    SHADER_SWIZZLE_OP (1341, xzwx) SHADER_SWIZZLE_OP (1342, xzwy) SHADER_SWIZZLE_OP (1343, xzwz) SHADER_SWIZZLE_OP (1344, xzww)
    SHADER_SWIZZLE_OP (14  , xw  ) SHADER_SWIZZLE_OP (141 , xwx ) SHADER_SWIZZLE_OP (1411, xwxx) SHADER_SWIZZLE_OP (1412, xwxy)
    SHADER_SWIZZLE_OP (1413, xwxz) SHADER_SWIZZLE_OP (1414, xwxw) SHADER_SWIZZLE_OP (142 , xwy ) SHADER_SWIZZLE_OP (1421, xwyx)
    SHADER_SWIZZLE_OP (1422, xwyy) SHADER_SWIZZLE_OP (1423, xwyz) SHADER_SWIZZLE_OP (1424, xwyw) SHADER_SWIZZLE_OP (143 , xwz )
    SHADER_SWIZZLE_OP (1431, xwzx) SHADER_SWIZZLE_OP (1432, xwzy) SHADER_SWIZZLE_OP (1433, xwzz) SHADER_SWIZZLE_OP (1434, xwzw)
    SHADER_SWIZZLE_OP (144 , xww ) SHADER_SWIZZLE_OP (1441, xwwx) SHADER_SWIZZLE_OP (1442, xwwy) SHADER_SWIZZLE_OP (1443, xwwz)
    SHADER_SWIZZLE_OP (1444, xwww) SHADER_SWIZZLE_OP (2   , y   ) SHADER_SWIZZLE_OP (21  , yx  ) SHADER_SWIZZLE_OP (211 , yxx )
    SHADER_SWIZZLE_OP (2111, yxxx) SHADER_SWIZZLE_OP (2112, yxxy) SHADER_SWIZZLE_OP (2113, yxxz) SHADER_SWIZZLE_OP (2114, yxxw)
    SHADER_SWIZZLE_OP (212 , yxy ) SHADER_SWIZZLE_OP (2121, yxyx) SHADER_SWIZZLE_OP (2122, yxyy) SHADER_SWIZZLE_OP (2123, yxyz)
    SHADER_SWIZZLE_OP (2124, yxyw) SHADER_SWIZZLE_OP (213 , yxz ) SHADER_SWIZZLE_OP (2131, yxzx) SHADER_SWIZZLE_OP (2132, yxzy)
    SHADER_SWIZZLE_OP (2133, yxzz) SHADER_SWIZZLE_OP (2134, yxzw) SHADER_SWIZZLE_OP (214 , yxw ) SHADER_SWIZZLE_OP (2141, yxwx)
    SHADER_SWIZZLE_OP (2142, yxwy) SHADER_SWIZZLE_OP (2143, yxwz) SHADER_SWIZZLE_OP (2144, yxww) SHADER_SWIZZLE_OP (22  , yy  )
    SHADER_SWIZZLE_OP (221 , yyx ) SHADER_SWIZZLE_OP (2211, yyxx) SHADER_SWIZZLE_OP (2212, yyxy) SHADER_SWIZZLE_OP (2213, yyxz)
    SHADER_SWIZZLE_OP (2214, yyxw) SHADER_SWIZZLE_OP (222 , yyy ) SHADER_SWIZZLE_OP (2221, yyyx) SHADER_SWIZZLE_OP (2222, yyyy)
    SHADER_SWIZZLE_OP (2223, yyyz) SHADER_SWIZZLE_OP (2224, yyyw) SHADER_SWIZZLE_OP (223 , yyz ) SHADER_SWIZZLE_OP (2231, yyzx)
    SHADER_SWIZZLE_OP (2232, yyzy) SHADER_SWIZZLE_OP (2233, yyzz) SHADER_SWIZZLE_OP (2234, yyzw) SHADER_SWIZZLE_OP (224 , yyw )
    SHADER_SWIZZLE_OP (2241, yywx) SHADER_SWIZZLE_OP (2242, yywy) SHADER_SWIZZLE_OP (2243, yywz) SHADER_SWIZZLE_OP (2244, yyww)
    SHADER_SWIZZLE_OP (23  , yz  ) SHADER_SWIZZLE_OP (231 , yzx ) SHADER_SWIZZLE_OP (2311, yzxx) SHADER_SWIZZLE_OP (2312, yzxy)
    SHADER_SWIZZLE_OP (2313, yzxz) SHADER_SWIZZLE_OP (2314, yzxw) SHADER_SWIZZLE_OP (232 , yzy ) SHADER_SWIZZLE_OP (2321, yzyx)
    SHADER_SWIZZLE_OP (2322, yzyy) SHADER_SWIZZLE_OP (2323, yzyz) SHADER_SWIZZLE_OP (2324, yzyw) SHADER_SWIZZLE_OP (233 , yzz )
    SHADER_SWIZZLE_OP (2331, yzzx) SHADER_SWIZZLE_OP (2332, yzzy) SHADER_SWIZZLE_OP (2333, yzzz) SHADER_SWIZZLE_OP (2334, yzzw)
    SHADER_SWIZZLE_OP (234 , yzw ) SHADER_SWIZZLE_OP (2341, yzwx) SHADER_SWIZZLE_OP (2342, yzwy) SHADER_SWIZZLE_OP (2343, yzwz)
    SHADER_SWIZZLE_OP (2344, yzww) SHADER_SWIZZLE_OP (24  , yw  ) SHADER_SWIZZLE_OP (241 , ywx ) SHADER_SWIZZLE_OP (2411, ywxx)
    SHADER_SWIZZLE_OP (2412, ywxy) SHADER_SWIZZLE_OP (2413, ywxz) SHADER_SWIZZLE_OP (2414, ywxw) SHADER_SWIZZLE_OP (242 , ywy )
    SHADER_SWIZZLE_OP (2421, ywyx) SHADER_SWIZZLE_OP (2422, ywyy) SHADER_SWIZZLE_OP (2423, ywyz) SHADER_SWIZZLE_OP (2424, ywyw)
    SHADER_SWIZZLE_OP (243 , ywz ) SHADER_SWIZZLE_OP (2431, ywzx) SHADER_SWIZZLE_OP (2432, ywzy) SHADER_SWIZZLE_OP (2433, ywzz)
    SHADER_SWIZZLE_OP (2434, ywzw) SHADER_SWIZZLE_OP (244 , yww ) SHADER_SWIZZLE_OP (2441, ywwx) SHADER_SWIZZLE_OP (2442, ywwy)
    SHADER_SWIZZLE_OP (2443, ywwz) SHADER_SWIZZLE_OP (2444, ywww) SHADER_SWIZZLE_OP (3   , z   ) SHADER_SWIZZLE_OP (31  , zx  )
    SHADER_SWIZZLE_OP (311 , zxx ) SHADER_SWIZZLE_OP (3111, zxxx) SHADER_SWIZZLE_OP (3112, zxxy) SHADER_SWIZZLE_OP (3113, zxxz)
    SHADER_SWIZZLE_OP (3114, zxxw) SHADER_SWIZZLE_OP (312 , zxy ) SHADER_SWIZZLE_OP (3121, zxyx) SHADER_SWIZZLE_OP (3122, zxyy)
    SHADER_SWIZZLE_OP (3123, zxyz) SHADER_SWIZZLE_OP (3124, zxyw) SHADER_SWIZZLE_OP (313 , zxz ) SHADER_SWIZZLE_OP (3131, zxzx)
    SHADER_SWIZZLE_OP (3132, zxzy) SHADER_SWIZZLE_OP (3133, zxzz) SHADER_SWIZZLE_OP (3134, zxzw) SHADER_SWIZZLE_OP (314 , zxw )
    SHADER_SWIZZLE_OP (3141, zxwx) SHADER_SWIZZLE_OP (3142, zxwy) SHADER_SWIZZLE_OP (3143, zxwz) SHADER_SWIZZLE_OP (3144, zxww)
    SHADER_SWIZZLE_OP (32  , zy  ) SHADER_SWIZZLE_OP (321 , zyx ) SHADER_SWIZZLE_OP (3211, zyxx) SHADER_SWIZZLE_OP (3212, zyxy)
    SHADER_SWIZZLE_OP (3213, zyxz) SHADER_SWIZZLE_OP (3214, zyxw) SHADER_SWIZZLE_OP (322 , zyy ) SHADER_SWIZZLE_OP (3221, zyyx)
    SHADER_SWIZZLE_OP (3222, zyyy) SHADER_SWIZZLE_OP (3223, zyyz) SHADER_SWIZZLE_OP (3224, zyyw) SHADER_SWIZZLE_OP (323 , zyz )
    SHADER_SWIZZLE_OP (3231, zyzx) SHADER_SWIZZLE_OP (3232, zyzy) SHADER_SWIZZLE_OP (3233, zyzz) SHADER_SWIZZLE_OP (3234, zyzw)
    SHADER_SWIZZLE_OP (324 , zyw ) SHADER_SWIZZLE_OP (3241, zywx) SHADER_SWIZZLE_OP (3242, zywy) SHADER_SWIZZLE_OP (3243, zywz)
    SHADER_SWIZZLE_OP (3244, zyww) SHADER_SWIZZLE_OP (33  , zz  ) SHADER_SWIZZLE_OP (331 , zzx ) SHADER_SWIZZLE_OP (3311, zzxx)
    SHADER_SWIZZLE_OP (3312, zzxy) SHADER_SWIZZLE_OP (3313, zzxz) SHADER_SWIZZLE_OP (3314, zzxw) SHADER_SWIZZLE_OP (332 , zzy )
    SHADER_SWIZZLE_OP (3321, zzyx) SHADER_SWIZZLE_OP (3322, zzyy) SHADER_SWIZZLE_OP (3323, zzyz) SHADER_SWIZZLE_OP (3324, zzyw)
    SHADER_SWIZZLE_OP (333 , zzz ) SHADER_SWIZZLE_OP (3331, zzzx) SHADER_SWIZZLE_OP (3332, zzzy) SHADER_SWIZZLE_OP (3333, zzzz)
    SHADER_SWIZZLE_OP (3334, zzzw) SHADER_SWIZZLE_OP (334 , zzw ) SHADER_SWIZZLE_OP (3341, zzwx) SHADER_SWIZZLE_OP (3342, zzwy)
    SHADER_SWIZZLE_OP (3343, zzwz) SHADER_SWIZZLE_OP (3344, zzww) SHADER_SWIZZLE_OP (34  , zw  ) SHADER_SWIZZLE_OP (341 , zwx )
    SHADER_SWIZZLE_OP (3411, zwxx) SHADER_SWIZZLE_OP (3412, zwxy) SHADER_SWIZZLE_OP (3413, zwxz) SHADER_SWIZZLE_OP (3414, zwxw)
    SHADER_SWIZZLE_OP (342 , zwy ) SHADER_SWIZZLE_OP (3421, zwyx) SHADER_SWIZZLE_OP (3422, zwyy) SHADER_SWIZZLE_OP (3423, zwyz)
    SHADER_SWIZZLE_OP (3424, zwyw) SHADER_SWIZZLE_OP (343 , zwz ) SHADER_SWIZZLE_OP (3431, zwzx) SHADER_SWIZZLE_OP (3432, zwzy)
    SHADER_SWIZZLE_OP (3433, zwzz) SHADER_SWIZZLE_OP (3434, zwzw) SHADER_SWIZZLE_OP (344 , zww ) SHADER_SWIZZLE_OP (3441, zwwx)
    SHADER_SWIZZLE_OP (3442, zwwy) SHADER_SWIZZLE_OP (3443, zwwz) SHADER_SWIZZLE_OP (3444, zwww) SHADER_SWIZZLE_OP (4   , w   )
    SHADER_SWIZZLE_OP (41  , wx  ) SHADER_SWIZZLE_OP (411 , wxx ) SHADER_SWIZZLE_OP (4111, wxxx) SHADER_SWIZZLE_OP (4112, wxxy)
    SHADER_SWIZZLE_OP (4113, wxxz) SHADER_SWIZZLE_OP (4114, wxxw) SHADER_SWIZZLE_OP (412 , wxy ) SHADER_SWIZZLE_OP (4121, wxyx)
    SHADER_SWIZZLE_OP (4122, wxyy) SHADER_SWIZZLE_OP (4123, wxyz) SHADER_SWIZZLE_OP (4124, wxyw) SHADER_SWIZZLE_OP (413 , wxz )
    SHADER_SWIZZLE_OP (4131, wxzx) SHADER_SWIZZLE_OP (4132, wxzy) SHADER_SWIZZLE_OP (4133, wxzz) SHADER_SWIZZLE_OP (4134, wxzw)
    SHADER_SWIZZLE_OP (414 , wxw ) SHADER_SWIZZLE_OP (4141, wxwx) SHADER_SWIZZLE_OP (4142, wxwy) SHADER_SWIZZLE_OP (4143, wxwz)
    SHADER_SWIZZLE_OP (4144, wxww) SHADER_SWIZZLE_OP (42  , wy  ) SHADER_SWIZZLE_OP (421 , wyx ) SHADER_SWIZZLE_OP (4211, wyxx)
    SHADER_SWIZZLE_OP (4212, wyxy) SHADER_SWIZZLE_OP (4213, wyxz) SHADER_SWIZZLE_OP (4214, wyxw) SHADER_SWIZZLE_OP (422 , wyy )
    SHADER_SWIZZLE_OP (4221, wyyx) SHADER_SWIZZLE_OP (4222, wyyy) SHADER_SWIZZLE_OP (4223, wyyz) SHADER_SWIZZLE_OP (4224, wyyw)
    SHADER_SWIZZLE_OP (423 , wyz ) SHADER_SWIZZLE_OP (4231, wyzx) SHADER_SWIZZLE_OP (4232, wyzy) SHADER_SWIZZLE_OP (4233, wyzz)
    SHADER_SWIZZLE_OP (4234, wyzw) SHADER_SWIZZLE_OP (424 , wyw ) SHADER_SWIZZLE_OP (4241, wywx) SHADER_SWIZZLE_OP (4242, wywy)
    SHADER_SWIZZLE_OP (4243, wywz) SHADER_SWIZZLE_OP (4244, wyww) SHADER_SWIZZLE_OP (43  , wz  ) SHADER_SWIZZLE_OP (431 , wzx )
    SHADER_SWIZZLE_OP (4311, wzxx) SHADER_SWIZZLE_OP (4312, wzxy) SHADER_SWIZZLE_OP (4313, wzxz) SHADER_SWIZZLE_OP (4314, wzxw)
    SHADER_SWIZZLE_OP (432 , wzy ) SHADER_SWIZZLE_OP (4321, wzyx) SHADER_SWIZZLE_OP (4322, wzyy) SHADER_SWIZZLE_OP (4323, wzyz)
    SHADER_SWIZZLE_OP (4324, wzyw) SHADER_SWIZZLE_OP (433 , wzz ) SHADER_SWIZZLE_OP (4331, wzzx) SHADER_SWIZZLE_OP (4332, wzzy)
    SHADER_SWIZZLE_OP (4333, wzzz) SHADER_SWIZZLE_OP (4334, wzzw) SHADER_SWIZZLE_OP (434 , wzw ) SHADER_SWIZZLE_OP (4341, wzwx)
    SHADER_SWIZZLE_OP (4342, wzwy) SHADER_SWIZZLE_OP (4343, wzwz) SHADER_SWIZZLE_OP (4344, wzww) SHADER_SWIZZLE_OP (44  , ww  )
    SHADER_SWIZZLE_OP (441 , wwx ) SHADER_SWIZZLE_OP (4411, wwxx) SHADER_SWIZZLE_OP (4412, wwxy) SHADER_SWIZZLE_OP (4413, wwxz)
    SHADER_SWIZZLE_OP (4414, wwxw) SHADER_SWIZZLE_OP (442 , wwy ) SHADER_SWIZZLE_OP (4421, wwyx) SHADER_SWIZZLE_OP (4422, wwyy)
    SHADER_SWIZZLE_OP (4423, wwyz) SHADER_SWIZZLE_OP (4424, wwyw) SHADER_SWIZZLE_OP (443 , wwz ) SHADER_SWIZZLE_OP (4431, wwzx)
    SHADER_SWIZZLE_OP (4432, wwzy) SHADER_SWIZZLE_OP (4433, wwzz) SHADER_SWIZZLE_OP (4434, wwzw) SHADER_SWIZZLE_OP (444 , www )
    SHADER_SWIZZLE_OP (4441, wwwx) SHADER_SWIZZLE_OP (4442, wwwy) SHADER_SWIZZLE_OP (4443, wwwz) SHADER_SWIZZLE_OP (4444, wwww)

#   undef SHADER_SWIZZLE_OP

#   define SHADER_FUNC0_(name, glname)                          \
      template<typename A>                                      \
      inline const sl_expr<sl_func0>                            \
      name ()                                                   \
      {                                                         \
        return sl_func0 (#glname " (");                         \
      }

#   define SHADER_FUNC0(name) SHADER_FUNC0_(name,name)

#   define SHADER_FUNC1_(name, glname)                          \
      template<typename A>                                      \
      inline const sl_expr< sl_func1<typename sl_convert<A>::T> >       \
      name (const A &a)                                 \
      {                                                         \
        return sl_func1<typename sl_convert<A>::T> (#glname " (", sl_convert<A>::convert (a));\
      }

#   define SHADER_FUNC1(name) SHADER_FUNC1_(name,name)

#   define SHADER_FUNC2_(name, glname)                          \
      template<typename A, typename B>                          \
      inline const sl_expr< sl_func2<typename sl_convert<A>::T, typename sl_convert<B>::T> >    \
      name (const A &a, const B &b)                             \
      {                                                         \
        return sl_func2<typename sl_convert<A>::T, typename sl_convert<B>::T> (#glname " (", sl_convert<A>::convert (a), sl_convert<B>::convert (b));\
      }

#   define SHADER_FUNC2(name) SHADER_FUNC2_(name,name)

#   define SHADER_FUNC3_(name, glname)                          \
      template<typename A, typename B, typename C>              \
      inline const sl_expr< sl_func3<typename sl_convert<A>::T, typename sl_convert<B>::T, typename sl_convert<C>::T> > \
      name (const A &a, const B &b, const C &c)                 \
      {                                                         \
        return sl_func3<typename sl_convert<A>::T, typename sl_convert<B>::T, typename sl_convert<C>::T> (#glname " (", sl_convert<A>::convert (a), sl_convert<B>::convert (b), sl_convert<C>::convert (c));\
      }

#   define SHADER_FUNC3(name) SHADER_FUNC3_(name,name)

#   define SHADER_FUNC4_(name, glname)                          \
      template<typename A, typename B, typename C, typename D>  \
      inline const sl_expr< sl_func4<typename sl_convert<A>::T, typename sl_convert<B>::T, typename sl_convert<C>::T, typename sl_convert<D>::T > >     \
      name (const A &a, const B &b, const C &c, const D &d)     \
      {                                                         \
        return sl_func4<typename sl_convert<A>::T, typename sl_convert<B>::T, typename sl_convert<C>::T, typename sl_convert<D>::T> (#glname " (", sl_convert<A>::convert (a), sl_convert<B>::convert (b), sl_convert<C>::convert (c), sl_convert<D>::convert (d));\
      }

#   define SHADER_FUNC4(name) SHADER_FUNC4_(name,name)

    SHADER_FUNC1 (abs)
    SHADER_FUNC1 (acos)
    SHADER_FUNC1 (all)
    SHADER_FUNC1 (any)
    SHADER_FUNC1 (asin)
    SHADER_FUNC1 (atan)
    SHADER_FUNC2 (atan)
    SHADER_FUNC1 (ceil)
    SHADER_FUNC3 (clamp)
    SHADER_FUNC1 (cos)
    SHADER_FUNC2 (cross)
    SHADER_FUNC1 (dFdx)
    SHADER_FUNC1 (dFdy)
    SHADER_FUNC1 (degrees)
    SHADER_FUNC2 (distance)
    SHADER_FUNC2 (dot)
    SHADER_FUNC2_(equal, equal)
    SHADER_FUNC1 (exp)
    SHADER_FUNC1 (exp2)
    SHADER_FUNC3 (faceforward)
    SHADER_FUNC1 (floor)
    SHADER_FUNC1 (fract)
    SHADER_FUNC0 (ftransform)
    SHADER_FUNC1 (fwidth)
    SHADER_FUNC2_(greater_than_equal, greaterThanEqual)
    SHADER_FUNC2_(greater_then, greaterThan)
    SHADER_FUNC1 (inversesqrt)
    SHADER_FUNC1 (length)
    SHADER_FUNC2_(less_than, lessThan)
    SHADER_FUNC2_(less_than_equal, lessThanEqual)
    SHADER_FUNC1 (log)
    SHADER_FUNC1 (log2)
    SHADER_FUNC2_(matrix_comp_mult, matrixCompMult)
    SHADER_FUNC2 (max)
    SHADER_FUNC2 (min)
    SHADER_FUNC3 (mix)
    SHADER_FUNC2 (mod)
    SHADER_FUNC1 (noise1)
    SHADER_FUNC1 (noise2)
    SHADER_FUNC1 (noise3)
    SHADER_FUNC1 (noise4)
    SHADER_FUNC1 (normalize)
    SHADER_FUNC1 (gl_not) // TODO
    SHADER_FUNC2_(notequal, notEqual)
    SHADER_FUNC2 (pow)
    SHADER_FUNC1 (radians)
    SHADER_FUNC2 (reflect)
    SHADER_FUNC3 (refract)
    SHADER_FUNC2_(shadow_1d, shadow1D)
    SHADER_FUNC3_(shadow_1d, shadow1D)
    SHADER_FUNC3_(shadow_1d_lod, shadow1DLod)
    SHADER_FUNC2_(shadow_1d_proj, shadow1DProj)
    SHADER_FUNC3_(shadow_1d_proj, shadow1DProj)
    SHADER_FUNC3_(shadow_1d_proj_lod, shadow1DProjLod)
    SHADER_FUNC2_(shadow_2d, shadow2D)
    SHADER_FUNC3_(shadow_2d, shadow2D)
    SHADER_FUNC3_(shadow_2d_lod, shadow2DLod)
    SHADER_FUNC2_(shadow_2d_proj, shadow2DProj)
    SHADER_FUNC3_(shadow_2d_proj, shadow2DProj)
    SHADER_FUNC3_(shadow_2d_proj_lod, shadow2DProjLod)
    SHADER_FUNC1 (sign)
    SHADER_FUNC1 (sin)
    SHADER_FUNC3 (smoothstep)
    SHADER_FUNC1 (sqrt)
    SHADER_FUNC2 (step)
    SHADER_FUNC1 (tan)
    SHADER_FUNC2_(texture_1d, texture1D)
    SHADER_FUNC3_(texture_1d, texture1D)
    SHADER_FUNC3_(texture_1d_lod, texture1DLod)
    SHADER_FUNC2_(texture_1d_proj, texture1DProj)
    SHADER_FUNC3_(texture_1d_proj, texture1DProj)
    SHADER_FUNC3_(texture_1d_proj_lod, texture1DProjLod)
    SHADER_FUNC2_(texture_2d, texture2D)
    SHADER_FUNC3_(texture_2d, texture2D)
    SHADER_FUNC3_(texture_2d_lod, texture2DLod)
    SHADER_FUNC2_(texture_2d_proj, texture2DProj)
    SHADER_FUNC3_(texture_2d_proj, texture2DProj)
    SHADER_FUNC3_(texture_2d_proj_lod, texture2DProjLod)
    SHADER_FUNC2_(texture_3d, texture3D)
    SHADER_FUNC3_(texture_3d, texture3D)
    SHADER_FUNC3_(texture_3d_lod, texture3DLod)
    SHADER_FUNC2_(texture_3d_proj, texture3DProj)
    SHADER_FUNC3_(texture_3d_proj, texture3DProj)
    SHADER_FUNC3_(texture_3d_proj_lod, texture3DProjLod)
    SHADER_FUNC2_(texture_cube, textureCube)
    SHADER_FUNC3_(texture_cube, textureCube)
    SHADER_FUNC3_(texture_cude_lod, textureCubeLod)
    SHADER_FUNC1 (vec2) SHADER_FUNC2 (vec2)
    SHADER_FUNC1 (vec3) SHADER_FUNC2 (vec3) SHADER_FUNC3 (vec3)
    SHADER_FUNC1 (vec4) SHADER_FUNC2 (vec4) SHADER_FUNC3 (vec4) SHADER_FUNC4 (vec4)
    SHADER_FUNC1 (mat2) SHADER_FUNC2 (mat2)
    SHADER_FUNC1 (mat3) SHADER_FUNC2 (mat3) SHADER_FUNC3 (mat3)
    SHADER_FUNC1 (mat4) SHADER_FUNC2 (mat4) SHADER_FUNC3 (mat4) SHADER_FUNC4 (mat4)

#   undef SHADER_FUNC0
#   undef SHADER_FUNC0_
#   undef SHADER_FUNC1
#   undef SHADER_FUNC1_
#   undef SHADER_FUNC2
#   undef SHADER_FUNC2_
#   undef SHADER_FUNC3
#   undef SHADER_FUNC3_
#   undef SHADER_FUNC4
#   undef SHADER_FUNC5_
  }

  void debdebdebdebug ();//D
}

#endif

#include "shader_vars.h"


Revision:	1.23
Committed:	Mon Nov 1 20:11:35 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+41 -23 lines
Log Message:	* empty log message *