libgender/material.h

#ifndef MATERIAL_H
#define MATERIAL_H

#include <vector>
#include <string>
#include <sstream>

#include "opengl.h"

#include "util.h"

namespace shader {

  using namespace std;

  const int NAMELEN = 16;

  class refcounted
  {
    template<class type> friend class ref;
    mutable int refcnt;
    void refcnt_inc () const { refcnt++; }
    void refcnt_dec () const { if (!--refcnt) delete this; };
  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 ->() { return p; }
    const type *operator ->() const { return p; }

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

    template<class type2>
    bool operator ==(const ref<type2> b) const
    {
      return (void *)p == (void *)b.p;
    }
  };

  extern const char str_float    [];
  extern const char str_float2   [];
  extern const char str_float3   [];
  extern const char str_float4   [];
  extern const char str_float4x4 [];

  extern const char str_sampler1d   [];
  extern const char str_sampler2d   [];
  extern const char str_sampler3d   [];
  extern const char str_samplerCUBE [];
  extern const char str_samplerRECT [];

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

  struct shader_builder
  {
    struct shader_program *prog;
    vector<uniform> refs; // uniform parameters
    vector<var> temps; // temporary variables
    vector<var> streams; // varying inputs & outputs

    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 var_i : fragment_i
  {
    static int next_name;

    CGparameter param;
    int name;
    const char *typestr;

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

    var_i (CGtype cgtype, const char *typestr);
    ~var_i ();
  };

  struct uniform_i : var_i
  {
    bool dirty;

    virtual void update () = 0;

    void build (shader_builder &b);
    void build_decl (ostringstream &b);
    uniform_i (CGtype cgtype, const char *strtype) : var_i (cgtype, strtype), dirty (true) { }
  };

  template<int dimension, typename gltype, CGtype cgtype, const char *strtype, void (*upd)(CGparameter, const gltype *)>
  struct uniform2_i : uniform_i
  {
    gltype data[dimension];

    void update ()
    {
      if (dirty)
        {
          upd (param, data);
          dirty = false;
        }
    }

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

  template<int dimension, const char *strtype, void (*update)(CGparameter, const GLfloat *)>
  struct uniform_f_i : uniform2_i<dimension, GLfloat, CG_FLOAT, strtype, update>
  {
  };

  struct uniform_1f_i : uniform_f_i<1, str_float, cgGLSetParameter1fv> {
    void operator =(GLfloat v)
    {
      data[0] = v;
      dirty = true;
    }
  };

  struct uniform_2f_i : uniform_f_i<2, str_float2, cgGLSetParameter2fv> { };

  struct uniform_3f_i : uniform_f_i<3, str_float3, cgGLSetParameter3fv> {
    void operator =(const vec3 &v)
    {
      data[0] = v.x;
      data[1] = v.y;
      data[2] = v.z;
      dirty = true;
    }
  };

  struct uniform_4f_i : uniform_f_i<4, str_float4, cgGLSetParameter4fv> {
    void operator =(const gl::matrix &m)
    {
      memcpy (data, m.data, 16 * sizeof (GLfloat));
      dirty = true;
    }
  };

  struct uniform_matrix_f_i : uniform_f_i<16, str_float4x4, cgGLSetMatrixParameterfc> { };

  typedef ref<uniform_1f_i> uniform_1f;
  typedef ref<uniform_2f_i> uniform_2f;
  typedef ref<uniform_3f_i> uniform_3f;
  typedef ref<uniform_4f_i> uniform_4f;
  typedef ref<uniform_matrix_f_i> uniform_matrix_f;

  struct stream_i : var_i
  {
    char binding[16];

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

  template<int dimension, GLenum gltype, CGtype cgtype, const char *strtype>
  struct varying_i : stream_i
  {
    varying_i (const char *binding)
    : stream_i (cgtype, strtype)
    {
      strcpy (this->binding, binding);
    }

    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, CG_FLOAT, strtype>
  {
    varying_f_i (const char *binding) : varying_i<dimension, GL_FLOAT, CG_FLOAT, strtype> (binding) { }

    void set (const gl::vertex_buffer_object &vb, GLint offset)
    {
      varying_i<dimension, GL_FLOAT, CG_FLOAT, strtype>::set (gl::format_stride (vb.format), (GLvoid *)(long)offset);
    }
  };

  struct varying_1f_i : varying_f_i<1, str_float>
  {
    varying_1f_i (const char *binding) : varying_f_i<1, str_float> (binding) { }
  };

  struct varying_2f_i : varying_f_i<2, str_float2>
  {
    varying_2f_i (const char *binding) : varying_f_i<2, str_float2> (binding) { }

    void set_t (const gl::vertex_buffer_object &vb)
    {
      set (vb, gl::format_offset_t (vb.format));
    }
  };

  struct varying_3f_i : varying_f_i<3, str_float3>
  {
    varying_3f_i (const char *binding) : varying_f_i<3, str_float3> (binding) { }

    void set_p (const gl::vertex_buffer_object &vb)
    {
      set (vb, gl::format_offset_p (vb.format));
    }

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

  struct varying_4f_i : varying_f_i<4, str_float4>
  {
    varying_4f_i (const char *binding) : varying_f_i<4, str_float4> (binding) { }
  };

  template<class class_i>
  struct ref_varying : ref<class_i>
  {
    ref_varying (const char *binding)
    : ref<class_i> (*new class_i (binding))
    {
    }
  };

  typedef ref_varying<varying_1f_i> varying_1f;
  typedef ref_varying<varying_2f_i> varying_2f;
  typedef ref_varying<varying_3f_i> varying_3f;
  typedef ref_varying<varying_4f_i> varying_4f;

  extern struct vin
  {
    static varying_3f position_3f;
    static varying_4f position_4f;
    static varying_3f normal_3f;
    static varying_4f normal_4f;
    static varying_3f color0_3f;
    static varying_4f color0_4f;
    static varying_3f color1_3f;
    static varying_4f color1_4f;
    static varying_1f psize_1f;
    static varying_1f attr6_1f, attr7_1f;
    static varying_2f attr6_2f, attr7_2f;
    static varying_3f attr6_3f, attr7_3f;
    static varying_4f attr6_4f, attr7_4f;
    static varying_1f texcoord_1f[8];
    static varying_2f texcoord_2f[8];
    static varying_3f texcoord_3f[8];
    static varying_4f texcoord_4f[8];

    bool is (const var &r);
  } vin;

  extern struct fin
  {
    static varying_4f position_4f;
    static varying_4f color0_4f;
    static varying_4f color1_4f;
    static varying_4f texcoord_4f[8];

    bool is (const var &r);
  } fin;

  extern struct fin &vout;

  extern struct fout
  {
    static varying_4f color0_4f;
    static varying_3f color0_3f;
    static varying_4f color1_4f;
    static varying_3f color1_3f;
    static varying_1f depth_1f;

    bool is (const var &r);
  } fout;

  // predefined globals
  extern uniform_matrix_f mvp, mv, proj;

  struct temporary_i : var_i
  {
    void build (shader_builder &b);

    temporary_i (CGtype cgtype, const char *strtype) : var_i (cgtype, strtype) { };
  };

  template<CGtype cgtype, const char *strtype>
  struct temp_ref : ref<temporary_i>
  {
    temp_ref ()
    : ref<temporary_i> (*new temporary_i (cgtype, strtype))
    {
    }
  };

  typedef temp_ref<CG_FLOAT, str_float   > temp_1f;
  typedef temp_ref<CG_FLOAT, str_float2  > temp_2f;
  typedef temp_ref<CG_FLOAT, str_float3  > temp_3f;
  typedef temp_ref<CG_FLOAT, str_float4  > temp_4f;
  typedef temp_ref<CG_FLOAT, str_float4x4> temp_matrix_f;

  template<CGtype cgtype, const char *strtype>
  struct sampler_i : uniform_i
  {
    GLuint texture;

    void update ()
    {
      if (dirty)
        {
          cgGLSetTextureParameter (param, texture);
          dirty = false;
        }
    }

    void begin ()
    {
      cgGLEnableTextureParameter (texture);
    }

    sampler_i (GLuint texturename) : uniform_i (cgtype, strtype), texture (texturename) { }
  };

  struct sampler1d_i : sampler_i<CG_SAMPLER1D, str_sampler1d>
  {
    sampler1d_i (GLuint texturename) : sampler_i<CG_SAMPLER1D, str_sampler1d> (texturename) { }
  };

  struct sampler2d_i : sampler_i<CG_SAMPLER2D, str_sampler2d>
  {
    sampler2d_i (GLuint texturename) : sampler_i<CG_SAMPLER2D, str_sampler2d> (texturename) { }
  };

  struct sampler3d_i : sampler_i<CG_SAMPLER3D, str_sampler3d>
  {
    sampler3d_i (GLuint texturename) : sampler_i<CG_SAMPLER3D, str_sampler3d> (texturename) { }
  };

  struct samplerCUBE_i : sampler_i<CG_SAMPLERCUBE, str_samplerCUBE>
  {
    samplerCUBE_i (GLuint texturename) : sampler_i<CG_SAMPLERCUBE, str_samplerCUBE> (texturename) { }
  };

  struct samplerRECT_i : sampler_i<CG_SAMPLERRECT, str_samplerRECT>
  {
    samplerRECT_i (GLuint texturename) : sampler_i<CG_SAMPLERRECT, str_samplerRECT> (texturename) { }
  };

  template<class sampler_i>
  struct sampler_ref : ref<sampler_i>
  {
    sampler_ref (GLuint texturename)
    : ref<sampler_i> (*new sampler_i (texturename))
    {
    }
  };

  typedef sampler_ref<sampler1d_i>   sampler1d;
  typedef sampler_ref<sampler2d_i>   sampler2d;
  typedef sampler_ref<sampler3d_i>   sampler3d;
  typedef sampler_ref<samplerCUBE_i> samplerCUBE;
  typedef sampler_ref<samplerRECT_i> samplerRECT;

  struct fragment_const_string_i : fragment_i
  {
    const char *str;

    void build (shader_builder &b);

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

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

    template<class fragment_i>
    fragment_vector_i &operator <<(ref<fragment_i> &f)
    {
      push_back (f);
      return *this;
    }

    template<class fragment_i>
    fragment_vector_i &operator <<(fragment_i &f)
    {
      push_back (f);
      return *this;
    }

    fragment_vector_i &operator <<(const char *s)
    {
      push_back (*new fragment_const_string_i (s));
      return *this;
    }
  };

  typedef ref<fragment_vector_i> fragment_vector;

  struct shader_program : fragment_vector_i
  {
    bool is_vertex;
    void print ();

    shader_program (bool is_vertex) : is_vertex(is_vertex) { }
  };

  struct vertex_program : shader_program
  {
    vertex_program () : shader_program (true) { }
  };

  struct fragment_program : shader_program
  {
    fragment_program () : shader_program (false) { }
  };

  void debdebdebdebug ();//D
}

struct texture_execption
{ 
  texture_execption (string s) : msg(s) { }
  string msg; 
};

inline int power_of_two (int input)
{
  int value = 1;

  while (value < input)
    {
      value <<= 1;
    }
  return value;
}

struct material
{
  virtual void begin () = 0;
  virtual void end () = 0;
  virtual ~material ();
};

struct simple_material : material
{
  colour diffuse, specular, emission;
  GLfloat shininess;

  void begin ();
  void end ();

  simple_material () 
  : diffuse(1, 0, 1, 1)
  , specular(1, 0, 1, 1)
  , emission(1, 0, 1, 1)
  , shininess(1.)
  {
  }
};

struct texture
{
  SDL_Surface *image;
  GLuint texture_pxls;
  GLfloat texcoord[4];

  GLuint load_texture (SDL_Surface *surface, GLfloat *texcoord);

  texture(const char *f)
  {
    image = IMG_Load (f);

    if (!image) 
      throw (texture_execption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));

    texture_pxls = load_texture (image, (GLfloat*)&texcoord);
    if (texture_pxls == 0) 
      throw (texture_execption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
  }
};

extern CGcontext cgc;

struct xshader 
{
   CGprogram vsh, fsh;
   CGparameter lightpos;
   // mv, mvp
   CGprofile vsh_profile, fsh_profile;
   CGparameter g_Texture; // the texture parameter

   void check_cg_error (void)
   {
     CGerror err = cgGetError ();

     if (err != CG_NO_ERROR)
       {
         printf("CG error: %s\n", cgGetErrorString (err));
         exit(1);
       }
   }
   xshader (const char *vshp, const char *fshp)
   {
     vsh_profile = CG_PROFILE_ARBVP1;
     //if (cgGLIsProfileSupported (CG_PROFILE_VP30)) vsh_profile = CG_PROFILE_VP30;
     //if (cgGLIsProfileSupported (CG_PROFILE_VP40)) vsh_profile = CG_PROFILE_VP40;
     fsh_profile = CG_PROFILE_ARBFP1;
     //if (cgGLIsProfileSupported (CG_PROFILE_FP30)) fsh_profile = CG_PROFILE_FP30;
     //if (cgGLIsProfileSupported (CG_PROFILE_FP40)) fsh_profile = CG_PROFILE_FP40;

     vsh = cgCreateProgramFromFile (cgc, CG_SOURCE, vshp, vsh_profile, 0, 0);
     check_cg_error ();
     cgGLLoadProgram (vsh);
     check_cg_error ();

     fsh = cgCreateProgramFromFile (cgc, CG_SOURCE, fshp, fsh_profile, 0, 0);
     check_cg_error ();
     cgGLLoadProgram (fsh);
     check_cg_error ();

     cgGLBindProgram (vsh);
     cgGLBindProgram (fsh);

    // mv = cgGetNamedParameter (vsh, "WorldProj");
    // mvp = cgGetNamedParameter (vsh, "WorldViewProj");
     //lightpos = cgGetNamedParameter (vsh, "LightPos");
     //cgGLSetParameter4f (lightpos, 10, 10, 0, 1); //camera.p.x, camera.p.y, camera.p.z, 1);

     check_cg_error ();
   }
};

struct osama_material : material, texture, xshader {
  osama_material () 
  : xshader ("vsh.cg", "fsh.cg"), texture ("textures/osama.jpg") 
  {
     g_Texture = cgGetNamedParameter(fsh, "Texture"); // the texture cg-warper ;)
     cgGLSetTextureParameter(g_Texture, texture_pxls); // Bind the texture number 999 to g_Texture
  }

  void begin ();
  void end ();

};

void init_shaders ();
#endif


Revision:	1.8
Committed:	Thu Oct 21 22:28:42 2004 UTC (21 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+77 -29 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef MATERIAL_H
2			#define MATERIAL_H
3
4	root	1.5	#include <vector>
5			#include <string>
6			#include <sstream>
7
8			#include "opengl.h"
9
10	root	1.1	#include "util.h"
11
12	root	1.5	namespace shader {
13
14			using namespace std;
15
16			const int NAMELEN = 16;
17
18			class refcounted
19			{
20	root	1.6	template<class type> friend class ref;
21			mutable int refcnt;
22			void refcnt_inc () const { refcnt++; }
23			void refcnt_dec () const { if (!--refcnt) delete this; };
24	root	1.5	public:
25			refcounted () : refcnt(0) { }
26			virtual ~refcounted ();
27			};
28
29	root	1.6	template<class type>
30			struct ref
31	root	1.5	{
32	root	1.6	type *p;
33	root	1.5
34	root	1.8	ref ()
35			{
36			p = new type;
37			p->refcnt_inc ();
38			}
39
40	root	1.6	ref (type &d)
41	root	1.5	{
42			d.refcnt_inc ();
43	root	1.6	p = &d;
44			}
45
46			ref (const ref &r)
47			{
48			r.p->refcnt_inc ();
49			p = r.p;
50	root	1.5	}
51
52	root	1.6	template<class type2>
53			ref (const ref<type2> &r)
54	root	1.5	{
55	root	1.6	r.p->refcnt_inc ();
56	root	1.5	p = r.p;
57			}
58
59	root	1.6	~ref ()
60	root	1.5	{
61			p->refcnt_dec ();
62			}
63
64	root	1.6	ref &operator =(type &d)
65	root	1.5	{
66	root	1.6	d.refcnt_inc ();
67			p->refcnt_dec ();
68			p = &d;
69			return *this;
70	root	1.5	}
71
72	root	1.6	type *operator ->() { return p; }
73			const type *operator ->() const { return p; }
74	root	1.5
75	root	1.6	operator type &() { return *p; }
76			operator const type &() const { return *p; }
77	root	1.5
78	root	1.6	template<class type2>
79			bool operator ==(const ref<type2> b) const
80	root	1.5	{
81	root	1.6	return (void )p == (void )b.p;
82	root	1.5	}
83			};
84
85	root	1.6	extern const char str_float [];
86			extern const char str_float2 [];
87			extern const char str_float3 [];
88			extern const char str_float4 [];
89			extern const char str_float4x4 [];
90
91	root	1.8	extern const char str_sampler1d [];
92			extern const char str_sampler2d [];
93			extern const char str_sampler3d [];
94			extern const char str_samplerCUBE [];
95			extern const char str_samplerRECT [];
96
97	root	1.5	typedef ref<struct var_i> var;
98	root	1.6	typedef ref<struct uniform_i> uniform;
99	root	1.5
100			struct shader_builder
101			{
102			struct shader_program *prog;
103	root	1.6	vector<uniform> refs; // uniform parameters
104			vector<var> temps; // temporary variables
105			vector<var> streams; // varying inputs & outputs
106	root	1.5
107	root	1.6	ostringstream source;
108	root	1.5
109			template<typename type>
110			shader_builder &operator <<(const type &t)
111			{
112	root	1.6	source << t;
113	root	1.5	return *this;
114			}
115			};
116
117	root	1.6	struct fragment_i : refcounted
118	root	1.5	{
119			virtual void build (shader_builder &b) = 0;
120			};
121
122	root	1.6	typedef ref<fragment_i> fragment;
123
124			struct var_i : fragment_i
125	root	1.5	{
126			static int next_name;
127
128			CGparameter param;
129			int name;
130	root	1.6	const char *typestr;
131	root	1.5
132			void build (shader_builder &b);
133	root	1.7	virtual void build_decl (ostringstream &b);
134	root	1.5
135	root	1.6	var_i (CGtype cgtype, const char *typestr);
136	root	1.5	~var_i ();
137			};
138
139	root	1.6	struct uniform_i : var_i
140	root	1.5	{
141	root	1.6	bool dirty;
142	root	1.5
143			virtual void update () = 0;
144
145	root	1.6	void build (shader_builder &b);
146			void build_decl (ostringstream &b);
147			uniform_i (CGtype cgtype, const char *strtype) : var_i (cgtype, strtype), dirty (true) { }
148	root	1.5	};
149
150	root	1.6	template<int dimension, typename gltype, CGtype cgtype, const char strtype, void (upd)(CGparameter, const gltype *)>
151			struct uniform2_i : uniform_i
152	root	1.5	{
153			gltype data[dimension];
154
155			void update ()
156			{
157			if (dirty)
158			{
159	root	1.6	upd (param, data);
160	root	1.5	dirty = false;
161			}
162			}
163
164	root	1.6	uniform2_i () : uniform_i (cgtype, strtype) { }
165	root	1.5	};
166
167	root	1.6	template<int dimension, const char strtype, void (update)(CGparameter, const GLfloat *)>
168			struct uniform_f_i : uniform2_i<dimension, GLfloat, CG_FLOAT, strtype, update>
169	root	1.5	{
170			};
171
172	root	1.6	struct uniform_1f_i : uniform_f_i<1, str_float, cgGLSetParameter1fv> {
173	root	1.5	void operator =(GLfloat v)
174			{
175			data[0] = v;
176			dirty = true;
177			}
178			};
179
180	root	1.6	struct uniform_2f_i : uniform_f_i<2, str_float2, cgGLSetParameter2fv> { };
181	root	1.5
182	root	1.6	struct uniform_3f_i : uniform_f_i<3, str_float3, cgGLSetParameter3fv> {
183	root	1.5	void operator =(const vec3 &v)
184			{
185			data[0] = v.x;
186			data[1] = v.y;
187			data[2] = v.z;
188			dirty = true;
189			}
190			};
191
192	root	1.6	struct uniform_4f_i : uniform_f_i<4, str_float4, cgGLSetParameter4fv> {
193	root	1.5	void operator =(const gl::matrix &m)
194			{
195			memcpy (data, m.data, 16 * sizeof (GLfloat));
196			dirty = true;
197			}
198			};
199
200	root	1.6	struct uniform_matrix_f_i : uniform_f_i<16, str_float4x4, cgGLSetMatrixParameterfc> { };
201	root	1.5
202			typedef ref<uniform_1f_i> uniform_1f;
203			typedef ref<uniform_2f_i> uniform_2f;
204			typedef ref<uniform_3f_i> uniform_3f;
205			typedef ref<uniform_4f_i> uniform_4f;
206			typedef ref<uniform_matrix_f_i> uniform_matrix_f;
207
208	root	1.6	struct stream_i : var_i
209	root	1.5	{
210			char binding[16];
211
212	root	1.6	void build (shader_builder &b);
213			void build_decl (ostringstream &b);
214			stream_i (CGtype type, const char *strtype) : var_i (type, strtype) { }
215			};
216
217			template<int dimension, GLenum gltype, CGtype cgtype, const char *strtype>
218			struct varying_i : stream_i
219			{
220			varying_i (const char *binding)
221			: stream_i (cgtype, strtype)
222			{
223			strcpy (this->binding, binding);
224			}
225	root	1.5
226			void set (GLsizei stride, GLvoid *ptr)
227			{
228			cgGLSetParameterPointer (param, dimension, gltype, stride, ptr);
229			}
230			};
231
232	root	1.6	template<int dimension, const char *strtype>
233			struct varying_f_i : varying_i<dimension, GL_FLOAT, CG_FLOAT, strtype>
234	root	1.5	{
235	root	1.6	varying_f_i (const char *binding) : varying_i<dimension, GL_FLOAT, CG_FLOAT, strtype> (binding) { }
236	root	1.5
237			void set (const gl::vertex_buffer_object &vb, GLint offset)
238			{
239	root	1.6	varying_i<dimension, GL_FLOAT, CG_FLOAT, strtype>::set (gl::format_stride (vb.format), (GLvoid *)(long)offset);
240	root	1.5	}
241			};
242
243	root	1.6	struct varying_1f_i : varying_f_i<1, str_float>
244	root	1.5	{
245	root	1.6	varying_1f_i (const char *binding) : varying_f_i<1, str_float> (binding) { }
246	root	1.5	};
247
248	root	1.6	struct varying_2f_i : varying_f_i<2, str_float2>
249	root	1.5	{
250	root	1.6	varying_2f_i (const char *binding) : varying_f_i<2, str_float2> (binding) { }
251	root	1.5
252			void set_t (const gl::vertex_buffer_object &vb)
253			{
254			set (vb, gl::format_offset_t (vb.format));
255			}
256			};
257
258	root	1.6	struct varying_3f_i : varying_f_i<3, str_float3>
259	root	1.5	{
260	root	1.6	varying_3f_i (const char *binding) : varying_f_i<3, str_float3> (binding) { }
261	root	1.5
262			void set_p (const gl::vertex_buffer_object &vb)
263			{
264			set (vb, gl::format_offset_p (vb.format));
265			}
266
267			void set_n (const gl::vertex_buffer_object &vb)
268			{
269			set (vb, gl::format_offset_n (vb.format));
270			}
271			};
272
273	root	1.6	struct varying_4f_i : varying_f_i<4, str_float4>
274			{
275			varying_4f_i (const char *binding) : varying_f_i<4, str_float4> (binding) { }
276			};
277
278			template<class class_i>
279			struct ref_varying : ref<class_i>
280			{
281			ref_varying (const char *binding)
282			: ref<class_i> (*new class_i (binding))
283			{
284			}
285			};
286
287			typedef ref_varying<varying_1f_i> varying_1f;
288			typedef ref_varying<varying_2f_i> varying_2f;
289			typedef ref_varying<varying_3f_i> varying_3f;
290			typedef ref_varying<varying_4f_i> varying_4f;
291
292			extern struct vin
293			{
294			static varying_3f position_3f;
295			static varying_4f position_4f;
296			static varying_3f normal_3f;
297			static varying_4f normal_4f;
298			static varying_3f color0_3f;
299			static varying_4f color0_4f;
300			static varying_3f color1_3f;
301			static varying_4f color1_4f;
302			static varying_1f psize_1f;
303			static varying_1f attr6_1f, attr7_1f;
304			static varying_2f attr6_2f, attr7_2f;
305			static varying_3f attr6_3f, attr7_3f;
306			static varying_4f attr6_4f, attr7_4f;
307	root	1.8	static varying_1f texcoord_1f[8];
308			static varying_2f texcoord_2f[8];
309			static varying_3f texcoord_3f[8];
310			static varying_4f texcoord_4f[8];
311	root	1.6
312			bool is (const var &r);
313			} vin;
314
315			extern struct fin
316			{
317			static varying_4f position_4f;
318			static varying_4f color0_4f;
319			static varying_4f color1_4f;
320	root	1.8	static varying_4f texcoord_4f[8];
321	root	1.6
322			bool is (const var &r);
323			} fin;
324
325			extern struct fin &vout;
326
327			extern struct fout
328			{
329			static varying_4f color0_4f;
330			static varying_3f color0_3f;
331			static varying_4f color1_4f;
332			static varying_3f color1_3f;
333			static varying_1f depth_1f;
334
335			bool is (const var &r);
336			} fout;
337
338			// predefined globals
339	root	1.8	extern uniform_matrix_f mvp, mv, proj;
340	root	1.6
341			struct temporary_i : var_i
342			{
343			void build (shader_builder &b);
344
345			temporary_i (CGtype cgtype, const char *strtype) : var_i (cgtype, strtype) { };
346			};
347
348			template<CGtype cgtype, const char *strtype>
349			struct temp_ref : ref<temporary_i>
350	root	1.5	{
351	root	1.6	temp_ref ()
352	root	1.7	: ref<temporary_i> (*new temporary_i (cgtype, strtype))
353	root	1.6	{
354			}
355	root	1.5	};
356
357	root	1.6	typedef temp_ref<CG_FLOAT, str_float > temp_1f;
358			typedef temp_ref<CG_FLOAT, str_float2 > temp_2f;
359			typedef temp_ref<CG_FLOAT, str_float3 > temp_3f;
360			typedef temp_ref<CG_FLOAT, str_float4 > temp_4f;
361			typedef temp_ref<CG_FLOAT, str_float4x4> temp_matrix_f;
362	root	1.5
363	root	1.8	template<CGtype cgtype, const char *strtype>
364			struct sampler_i : uniform_i
365			{
366			GLuint texture;
367
368			void update ()
369			{
370			if (dirty)
371			{
372			cgGLSetTextureParameter (param, texture);
373			dirty = false;
374			}
375			}
376
377			void begin ()
378			{
379			cgGLEnableTextureParameter (texture);
380			}
381
382			sampler_i (GLuint texturename) : uniform_i (cgtype, strtype), texture (texturename) { }
383			};
384
385			struct sampler1d_i : sampler_i<CG_SAMPLER1D, str_sampler1d>
386			{
387			sampler1d_i (GLuint texturename) : sampler_i<CG_SAMPLER1D, str_sampler1d> (texturename) { }
388			};
389
390			struct sampler2d_i : sampler_i<CG_SAMPLER2D, str_sampler2d>
391			{
392			sampler2d_i (GLuint texturename) : sampler_i<CG_SAMPLER2D, str_sampler2d> (texturename) { }
393			};
394
395			struct sampler3d_i : sampler_i<CG_SAMPLER3D, str_sampler3d>
396			{
397			sampler3d_i (GLuint texturename) : sampler_i<CG_SAMPLER3D, str_sampler3d> (texturename) { }
398			};
399
400			struct samplerCUBE_i : sampler_i<CG_SAMPLERCUBE, str_samplerCUBE>
401	root	1.5	{
402	root	1.8	samplerCUBE_i (GLuint texturename) : sampler_i<CG_SAMPLERCUBE, str_samplerCUBE> (texturename) { }
403	root	1.5	};
404	root	1.8
405			struct samplerRECT_i : sampler_i<CG_SAMPLERRECT, str_samplerRECT>
406			{
407			samplerRECT_i (GLuint texturename) : sampler_i<CG_SAMPLERRECT, str_samplerRECT> (texturename) { }
408			};
409
410			template<class sampler_i>
411			struct sampler_ref : ref<sampler_i>
412			{
413			sampler_ref (GLuint texturename)
414			: ref<sampler_i> (*new sampler_i (texturename))
415			{
416			}
417			};
418
419			typedef sampler_ref<sampler1d_i> sampler1d;
420			typedef sampler_ref<sampler2d_i> sampler2d;
421			typedef sampler_ref<sampler3d_i> sampler3d;
422			typedef sampler_ref<samplerCUBE_i> samplerCUBE;
423			typedef sampler_ref<samplerRECT_i> samplerRECT;
424	root	1.5
425	root	1.6	struct fragment_const_string_i : fragment_i
426			{
427			const char *str;
428
429			void build (shader_builder &b);
430
431			fragment_const_string_i (const char *str) : str(str) { }
432			};
433
434			struct fragment_vector_i : fragment_i, vector<fragment>
435			{
436			void build (shader_builder &b);
437
438			template<class fragment_i>
439			fragment_vector_i &operator <<(ref<fragment_i> &f)
440			{
441			push_back (f);
442			return *this;
443			}
444
445			template<class fragment_i>
446			fragment_vector_i &operator <<(fragment_i &f)
447			{
448			push_back (f);
449			return *this;
450			}
451
452			fragment_vector_i &operator <<(const char *s)
453			{
454			push_back (*new fragment_const_string_i (s));
455			return *this;
456			}
457			};
458
459			typedef ref<fragment_vector_i> fragment_vector;
460
461			struct shader_program : fragment_vector_i
462	root	1.5	{
463	root	1.6	bool is_vertex;
464			void print ();
465
466			shader_program (bool is_vertex) : is_vertex(is_vertex) { }
467			};
468
469			struct vertex_program : shader_program
470			{
471			vertex_program () : shader_program (true) { }
472	root	1.5	};
473	root	1.6
474			struct fragment_program : shader_program
475			{
476			fragment_program () : shader_program (false) { }
477			};
478
479			void debdebdebdebug ();//D
480	root	1.5	}
481	root	1.3
482			struct texture_execption
483			{
484			texture_execption (string s) : msg(s) { }
485			string msg;
486			};
487
488			inline int power_of_two (int input)
489			{
490			int value = 1;
491
492			while (value < input)
493			{
494			value <<= 1;
495			}
496			return value;
497			}
498
499	root	1.1	struct material
500			{
501	root	1.2	virtual void begin () = 0;
502			virtual void end () = 0;
503	root	1.1	virtual ~material ();
504			};
505
506			struct simple_material : material
507			{
508			colour diffuse, specular, emission;
509			GLfloat shininess;
510
511	root	1.2	void begin ();
512			void end ();
513	root	1.1
514			simple_material ()
515			: diffuse(1, 0, 1, 1)
516			, specular(1, 0, 1, 1)
517			, emission(1, 0, 1, 1)
518			, shininess(1.)
519			{
520			}
521			};
522
523	root	1.3	struct texture
524			{
525			SDL_Surface *image;
526			GLuint texture_pxls;
527			GLfloat texcoord[4];
528
529			GLuint load_texture (SDL_Surface surface, GLfloat texcoord);
530
531			texture(const char *f)
532			{
533			image = IMG_Load (f);
534
535			if (!image)
536			throw (texture_execption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ()));
537
538			texture_pxls = load_texture (image, (GLfloat*)&texcoord);
539			if (texture_pxls == 0)
540			throw (texture_execption ("Couldn't make GL Texture, failed to create new RGB SWSurface"));
541			}
542			};
543
544			extern CGcontext cgc;
545
546	root	1.6	struct xshader
547	root	1.3	{
548			CGprogram vsh, fsh;
549			CGparameter lightpos;
550			// mv, mvp
551			CGprofile vsh_profile, fsh_profile;
552	root	1.4	CGparameter g_Texture; // the texture parameter
553	root	1.3
554			void check_cg_error (void)
555			{
556			CGerror err = cgGetError ();
557
558			if (err != CG_NO_ERROR)
559			{
560			printf("CG error: %s\n", cgGetErrorString (err));
561			exit(1);
562			}
563			}
564	root	1.6	xshader (const char vshp, const char fshp)
565	root	1.3	{
566			vsh_profile = CG_PROFILE_ARBVP1;
567			//if (cgGLIsProfileSupported (CG_PROFILE_VP30)) vsh_profile = CG_PROFILE_VP30;
568			//if (cgGLIsProfileSupported (CG_PROFILE_VP40)) vsh_profile = CG_PROFILE_VP40;
569			fsh_profile = CG_PROFILE_ARBFP1;
570			//if (cgGLIsProfileSupported (CG_PROFILE_FP30)) fsh_profile = CG_PROFILE_FP30;
571			//if (cgGLIsProfileSupported (CG_PROFILE_FP40)) fsh_profile = CG_PROFILE_FP40;
572
573			vsh = cgCreateProgramFromFile (cgc, CG_SOURCE, vshp, vsh_profile, 0, 0);
574			check_cg_error ();
575			cgGLLoadProgram (vsh);
576			check_cg_error ();
577
578			fsh = cgCreateProgramFromFile (cgc, CG_SOURCE, fshp, fsh_profile, 0, 0);
579			check_cg_error ();
580			cgGLLoadProgram (fsh);
581			check_cg_error ();
582
583	root	1.4	cgGLBindProgram (vsh);
584			cgGLBindProgram (fsh);
585	root	1.3
586			// mv = cgGetNamedParameter (vsh, "WorldProj");
587			// mvp = cgGetNamedParameter (vsh, "WorldViewProj");
588	root	1.4	//lightpos = cgGetNamedParameter (vsh, "LightPos");
589			//cgGLSetParameter4f (lightpos, 10, 10, 0, 1); //camera.p.x, camera.p.y, camera.p.z, 1);
590
591			check_cg_error ();
592	root	1.3	}
593			};
594
595	root	1.6	struct osama_material : material, texture, xshader {
596	root	1.3	osama_material ()
597	root	1.6	: xshader ("vsh.cg", "fsh.cg"), texture ("textures/osama.jpg")
598	root	1.3	{
599			g_Texture = cgGetNamedParameter(fsh, "Texture"); // the texture cg-warper ;)
600	root	1.4	cgGLSetTextureParameter(g_Texture, texture_pxls); // Bind the texture number 999 to g_Texture
601	root	1.3	}
602
603			void begin ();
604			void end ();
605
606			};
607
608			void init_shaders ();
609	root	1.1	#endif
610
611