libgender/shader.C

#include <cassert>

#include "shader.h"
#include "shader_vars.h"

#include <sstream>
#include <iomanip>

namespace shader {

  using namespace std;

  refcounted::~refcounted ()
  {
    if (refcnt)
      abort ();
  }

  void refcounted::refcnt_dec () const
  {
    if (!--refcnt)
      delete this; // quite a bit of code...
  }

  const char str_float  [] = "float";
  const char str_vec2   [] = "vec2";
  const char str_vec3   [] = "vec3";
  const char str_vec4   [] = "vec4";
  const char str_mat2   [] = "mat2";
  const char str_mat3   [] = "mat3";
  const char str_mat4   [] = "mat4";

  const char str_sampler_1d             [] = "sampler1D";
  const char str_sampler_1d_shadow      [] = "sampler1DShadow";
  const char str_sampler_2d             [] = "sampler2D";
  const char str_sampler_2d_shadow      [] = "sampler2DShadow";
  const char str_sampler_2d_rect        [] = "sampler2DRect";
  const char str_sampler_2d_rect_shadow [] = "sampler2DRectShadow";
  const char str_sampler_3d             [] = "sampler3D";
  const char str_sampler_3d_rect        [] = "sampler3DRect";
  const char str_sampler_cube           [] = "samplerCube";

  unsigned int var_i::next_id = 0;

  var_i::var_i (const char *typestr)
  : typestr (typestr)
  {
  }

  var_i::~var_i ()
  {
  }

#if 0
  stream_i::stream_i (const char *strtype)
  : var_i (strtype)
  {
    sprintf (name, "V%d", ++next_id);
  }
#endif

  temporary_i::temporary_i (const char *strtype)
  : var_i (strtype)
  {
    sprintf (name, "T%d", ++next_id);
  }

  varying_i::varying_i (const char *strtype)
  : var_i (strtype)
  {
    sprintf (name, "V%d", ++next_id);
  }

  uniform_i::uniform_i (const char *strtype)
  : var_i (strtype)
  {
    sprintf (name, "U%d", ++next_id);
  }

  fragment_string_i::~fragment_string_i ()
  {
    free (str);
  }

  ////////////////////////////////////////////////////////////////////////////

  void var_i::build_decl (ostringstream &b)
  {
    b << typestr << ' ' << name;
  }

  void uniform_i::build_decl (ostringstream &b)
  {
    b << "uniform " << typestr << ' ' << name;
  }

  void varying_i::build_decl (ostringstream &b)
  {
    b << "varying " << typestr << ' ' << name;
  }

  ////////////////////////////////////////////////////////////////////////////

  void gluvar_i::build (shader_builder &b)
  {
    b << name;
  }

  void var_i::build (shader_builder &b)
  {
    b << name;
  }

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

    if (find (b.refs.begin (), b.refs.end (), uniform (*this)) == b.refs.end ())
      b.refs.push_back (*this);
  }

#if 0
  void stream_i::build (shader_builder &b)
  {
    var_i::build (b);

#if 0
    if (find (b.streams.begin (), b.streams.end (), var (*this)) == b.streams.end ())
      b.streams.push_back (*this);
#endif
  }
#endif

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

    if (find (b.temps.begin (), b.temps.end (), var (*this)) == b.temps.end ())
      b.temps.push_back (*this);
  }

  void varying_i::build (shader_builder &b)
  {
    var_i::build (b);

    if (find (b.refs.begin (), b.refs.end (), var (*this)) == b.refs.end ())
      b.refs.push_back (*this);
  }

  void fragment_vector_i::build (shader_builder &b)
  {
    for (vector<fragment>::iterator i = begin (); i != end (); i++)
      (*i)->build (b);
  }

  void fragment_const_string_i::build (shader_builder &b)
  {
    b << str;
  }

  void fragment_string_i::build (shader_builder &b)
  {
    b << str;
  }

#if 0
  void statement_i::build (shader_builder &b)
  {
    b << "  ";
    fragment_vector_i::build (b);
    b << ";\n";
  }
#endif

  ////////////////////////////////////////////////////////////////////////////

  int texture_units::unit_count = 8;
  int texture_units::units[8] = { 7, 6, 5, 4, 3, 2, 1, 0 };

  shader_object_i *cur = 0;

  shader_object_i::shader_object_i (GLenum type)
  : type (type)
  {
    id = glCreateShaderObjectARB (type);
    assert (id);
  }

  shader_object_i::~shader_object_i ()
  {
    glDeleteObjectARB (id);
  }

  void shader_object_i::start ()
  {
    clear ();
    cur = this;
  }

  void shader_object_i::stop ()
  {
    cur = 0;
  }

  string shader_object_i::source ()
  {
    shader_builder b;
    build (b);
    ostringstream os;

    for (vector<var>::iterator i = b.refs.begin (); i != b.refs.end (); i++)
      {
        (*i)->build_decl (os);
        os << ";\n";
      }

#if 0
    // not neccessary right now, as GLSL is rich on predefinitions
    for (vector<var>::iterator i = b.streams.begin (); i != b.streams.end (); i++)
      {
        os << "attribute ";
        (*i)->build_decl (os);
        os << ";\n";
      }
#endif

    os << "\nvoid main (void)\n{\n";

    for (vector<var>::iterator i = b.temps.begin (); i != b.temps.end (); i++)
      {
        os << "  ";
        (*i)->build_decl (os);
        os << ";\n";
      }

    os << "\n";
    os << b.source.str ();
    os << "}\n";

    return os.str ();
  }

  static string linify (const string &s)
  {
    ostringstream o;

    int b = 0, e;
    int l = 1;
    do {
      o << setw (3) << l << ": ";
      e = s.find ('\n', b);
      if (e == string::npos)
        e = s.size ();

      o << s.substr (b, e - b + 1);
      b = e + 1;
      l++;
    } while (b < s.size ());

    return o.str ();
  }

  void shader_object_i::compile ()
  {
    string src = source ();
    const char *sptr = src.data ();
    const int slen = src.size ();

    printf ("%s\n", linify (src).c_str ());
    glShaderSourceARB (id, 1, &sptr, &slen);
    glCompileShaderARB (id);

    GLint compiled;
    glGetObjectParameterivARB (id, GL_OBJECT_COMPILE_STATUS_ARB, &compiled);

    if (!compiled)
      {
        char infolog[8192];
        glGetInfoLogARB (id, 8192, NULL, infolog);
        printf ("%s\n", linify (src).c_str ());
        printf ("%s\n", infolog);
        abort ();
      }
  }

  ////////////////////////////////////////////////////////////////////////////
  
  program_object *program_object::cur = 0;

  GLint uniform_i::location ()
  {
    assert (program_object::cur);

    GLint &rid = program_object::cur->uloc[this];

    if (!rid)
      rid = glGetUniformLocationARB (program_object::cur->id, name);

    return rid;
  }

  program_object::program_object ()
  {
    id = glCreateProgramObjectARB ();
    assert (id);

    glAttachObjectARB (id, vsh->id);
    glAttachObjectARB (id, fsh->id);
  }

  program_object::~program_object ()
  {
    glDeleteProgramsARB (1, &id);
  }

  void program_object::link ()
  {
    glLinkProgramARB (id);
        
    GLint linked;
    glGetObjectParameterivARB (id, GL_OBJECT_LINK_STATUS_ARB, &linked);

    if (!linked)
      {
        char infolog[8192];
        glGetInfoLogARB (id, 8192, NULL, infolog);
        printf ("LINK-INFOLOG<%s>\n", infolog);
        abort ();
      }

    uloc.clear ();
  }

  void program_object::enable ()
  {
    glUseProgramObjectARB (id);
    //TODO: set samplers here
    cur = this;
  }

  void program_object::disable ()
  {
    //TODO: clear samplers here
    glUseProgramObjectARB (0);
    cur = 0;
  }

  void sl_func0::begin () const
  {
    cur->append_string (name_par);
  }

  void sl_func0::comma () const
  {
    cur->append (compile::str_comma);
  }

  void sl_func0::end () const
  {
    cur->append_const (")");
  }

  void sl_float::operator ()() const
  {
    char s[20];
    sprintf (s, "%g", c);
    cur->append_string (s);
  }

  const sl_convert< ::vec2 >::T sl_convert< ::vec2 >::convert (const ::vec2 &v)
  {
    sl_string<60> s;
    sprintf (s.str, "vec2 (%g, %g)", v.x, v.y);
    return s;
  }

  const sl_convert< ::vec3 >::T sl_convert< ::vec3 >::convert (const ::vec3 &v)
  {
    sl_string<80> s;
    sprintf (s.str, "vec3 (%g, %g, %g)", v.x, v.y, v.z);
    return s;
  }

  const sl_convert< ::vec4 >::T sl_convert< ::vec4 >::convert (const ::vec4 &v)
  {
    sl_string<100> s;
    sprintf (s.str, "vec4 (%g, %g, %g, %g)", v.x, v.y, v.z, v.w);
    return s;
  }

  namespace compile {

    const fragment_const_string str_2sp    ("  ");
    const fragment_const_string str_equal  (" = ");
    const fragment_const_string str_comma  (", ");
    const fragment_const_string str_endl   (";\n");
  }

  void debdebdebdebug ()//D
  {
    return;

    using namespace compile;

    vertex_shader vsh;

    vsh->start ();

    temp_4f lightpos;
    temp_4f wpos;

    lightpos = vec4 (0, 10, 0, 1);
    wpos = model_view_matrix * vin.vertex;
    vout.position = vin.vertex * model_view_matrix_inverse;
    vout.tex_coord[0] = vin.tex_coord[0];
    vout.tex_coord[1] = normalize (lightpos - wpos);
    vout.tex_coord[2] = normalize (wpos);
    //vout.tex_coord[3] = normalize (xyz (model_view_matrix_inverse_transpose) * vin.normal);
    //vout.tex_coord[4] = normalize (xyz (projection_matrix_inverse_transpose) - wpos);

    vsh->end ();
    vsh->compile ();

    fragment_shader fsh;

    fsh->start ();

    xyz (fout.frag_color) = noise3 (x (fin.frag_coord) * y (fin.frag_coord));

    temp_1f spec_expon;
    spec_expon = 200;

    fsh->end ();
    fsh->compile ();

    //abort ();
  }

}

Revision:	1.25
Committed:	Mon Nov 1 22:23:38 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.24:	+1 -38 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.12	#include <cassert>
2
3	root	1.1	#include "shader.h"
4			#include "shader_vars.h"
5
6	root	1.17	#include <sstream>
7			#include <iomanip>
8
9	root	1.18	namespace shader {
10	root	1.17
11	root	1.18	using namespace std;
12	root	1.1
13			refcounted::~refcounted ()
14			{
15			if (refcnt)
16			abort ();
17			}
18
19	root	1.6	void refcounted::refcnt_dec () const
20			{
21			if (!--refcnt)
22			delete this; // quite a bit of code...
23			}
24
25	root	1.1	const char str_float [] = "float";
26			const char str_vec2 [] = "vec2";
27			const char str_vec3 [] = "vec3";
28			const char str_vec4 [] = "vec4";
29			const char str_mat2 [] = "mat2";
30			const char str_mat3 [] = "mat3";
31			const char str_mat4 [] = "mat4";
32
33			const char str_sampler_1d [] = "sampler1D";
34			const char str_sampler_1d_shadow [] = "sampler1DShadow";
35			const char str_sampler_2d [] = "sampler2D";
36			const char str_sampler_2d_shadow [] = "sampler2DShadow";
37			const char str_sampler_2d_rect [] = "sampler2DRect";
38			const char str_sampler_2d_rect_shadow [] = "sampler2DRectShadow";
39			const char str_sampler_3d [] = "sampler3D";
40			const char str_sampler_3d_rect [] = "sampler3DRect";
41			const char str_sampler_cube [] = "samplerCube";
42
43			unsigned int var_i::next_id = 0;
44
45			var_i::var_i (const char *typestr)
46			: typestr (typestr)
47			{
48			}
49
50			var_i::~var_i ()
51			{
52			}
53
54	root	1.24	#if 0
55	root	1.4	stream_i::stream_i (const char *strtype)
56			: var_i (strtype)
57			{
58	root	1.19	sprintf (name, "V%d", ++next_id);
59	root	1.4	}
60	root	1.24	#endif
61	root	1.4
62	root	1.1	temporary_i::temporary_i (const char *strtype)
63			: var_i (strtype)
64			{
65	root	1.19	sprintf (name, "T%d", ++next_id);
66	root	1.1	}
67
68	root	1.24	varying_i::varying_i (const char *strtype)
69			: var_i (strtype)
70			{
71			sprintf (name, "V%d", ++next_id);
72			}
73
74	root	1.1	uniform_i::uniform_i (const char *strtype)
75	root	1.19	: var_i (strtype)
76	root	1.1	{
77	root	1.19	sprintf (name, "U%d", ++next_id);
78	root	1.1	}
79
80			fragment_string_i::~fragment_string_i ()
81			{
82			free (str);
83			}
84
85			////////////////////////////////////////////////////////////////////////////
86
87			void var_i::build_decl (ostringstream &b)
88			{
89			b << typestr << ' ' << name;
90			}
91
92			void uniform_i::build_decl (ostringstream &b)
93			{
94			b << "uniform " << typestr << ' ' << name;
95			}
96
97	root	1.24	void varying_i::build_decl (ostringstream &b)
98	root	1.1	{
99	root	1.24	b << "varying " << typestr << ' ' << name;
100	root	1.1	}
101
102			////////////////////////////////////////////////////////////////////////////
103
104	root	1.16	void gluvar_i::build (shader_builder &b)
105	root	1.1	{
106			b << name;
107			}
108
109			void var_i::build (shader_builder &b)
110			{
111			b << name;
112			}
113
114			void uniform_i::build (shader_builder &b)
115			{
116			var_i::build (b);
117
118			if (find (b.refs.begin (), b.refs.end (), uniform (*this)) == b.refs.end ())
119			b.refs.push_back (*this);
120			}
121
122	root	1.24	#if 0
123	root	1.1	void stream_i::build (shader_builder &b)
124			{
125			var_i::build (b);
126
127	root	1.22	#if 0
128	root	1.1	if (find (b.streams.begin (), b.streams.end (), var (*this)) == b.streams.end ())
129			b.streams.push_back (*this);
130	root	1.22	#endif
131	root	1.1	}
132	root	1.24	#endif
133	root	1.1
134			void temporary_i::build (shader_builder &b)
135			{
136			var_i::build (b);
137
138			if (find (b.temps.begin (), b.temps.end (), var (*this)) == b.temps.end ())
139			b.temps.push_back (*this);
140			}
141
142	root	1.24	void varying_i::build (shader_builder &b)
143			{
144			var_i::build (b);
145
146			if (find (b.refs.begin (), b.refs.end (), var (*this)) == b.refs.end ())
147			b.refs.push_back (*this);
148			}
149
150	root	1.1	void fragment_vector_i::build (shader_builder &b)
151			{
152			for (vector<fragment>::iterator i = begin (); i != end (); i++)
153			(*i)->build (b);
154			}
155
156			void fragment_const_string_i::build (shader_builder &b)
157			{
158			b << str;
159			}
160
161			void fragment_string_i::build (shader_builder &b)
162			{
163			b << str;
164			}
165
166			#if 0
167			void statement_i::build (shader_builder &b)
168			{
169			b << " ";
170			fragment_vector_i::build (b);
171			b << ";\n";
172			}
173			#endif
174
175			////////////////////////////////////////////////////////////////////////////
176
177	root	1.20	int texture_units::unit_count = 8;
178	root	1.21	int texture_units::units[8] = { 7, 6, 5, 4, 3, 2, 1, 0 };
179	root	1.20
180	root	1.1	shader_object_i *cur = 0;
181
182			shader_object_i::shader_object_i (GLenum type)
183			: type (type)
184			{
185			id = glCreateShaderObjectARB (type);
186	root	1.12	assert (id);
187	root	1.1	}
188
189			shader_object_i::~shader_object_i ()
190			{
191			glDeleteObjectARB (id);
192			}
193
194			void shader_object_i::start ()
195			{
196			clear ();
197			cur = this;
198			}
199
200			void shader_object_i::stop ()
201			{
202			cur = 0;
203			}
204
205			string shader_object_i::source ()
206			{
207			shader_builder b;
208			build (b);
209			ostringstream os;
210
211	root	1.24	for (vector<var>::iterator i = b.refs.begin (); i != b.refs.end (); i++)
212	root	1.1	{
213			(*i)->build_decl (os);
214			os << ";\n";
215			}
216
217	root	1.22	#if 0
218	root	1.1	// not neccessary right now, as GLSL is rich on predefinitions
219			for (vector<var>::iterator i = b.streams.begin (); i != b.streams.end (); i++)
220			{
221			os << "attribute ";
222			(*i)->build_decl (os);
223			os << ";\n";
224			}
225	root	1.22	#endif
226	root	1.1
227			os << "\nvoid main (void)\n{\n";
228
229			for (vector<var>::iterator i = b.temps.begin (); i != b.temps.end (); i++)
230			{
231			os << " ";
232			(*i)->build_decl (os);
233			os << ";\n";
234			}
235
236			os << "\n";
237			os << b.source.str ();
238			os << "}\n";
239
240			return os.str ();
241			}
242
243	root	1.17	static string linify (const string &s)
244			{
245			ostringstream o;
246
247			int b = 0, e;
248			int l = 1;
249			do {
250			o << setw (3) << l << ": ";
251			e = s.find ('\n', b);
252			if (e == string::npos)
253			e = s.size ();
254
255			o << s.substr (b, e - b + 1);
256			b = e + 1;
257			l++;
258			} while (b < s.size ());
259
260			return o.str ();
261			}
262
263	root	1.1	void shader_object_i::compile ()
264			{
265			string src = source ();
266			const char *sptr = src.data ();
267			const int slen = src.size ();
268
269	root	1.17	printf ("%s\n", linify (src).c_str ());
270	root	1.1	glShaderSourceARB (id, 1, &sptr, &slen);
271			glCompileShaderARB (id);
272
273			GLint compiled;
274			glGetObjectParameterivARB (id, GL_OBJECT_COMPILE_STATUS_ARB, &compiled);
275
276			if (!compiled)
277			{
278			char infolog[8192];
279			glGetInfoLogARB (id, 8192, NULL, infolog);
280	root	1.17	printf ("%s\n", linify (src).c_str ());
281			printf ("%s\n", infolog);
282	root	1.12	abort ();
283			}
284			}
285
286	root	1.19	////////////////////////////////////////////////////////////////////////////
287
288			program_object *program_object::cur = 0;
289
290			GLint uniform_i::location ()
291			{
292			assert (program_object::cur);
293
294			GLint &rid = program_object::cur->uloc[this];
295
296			if (!rid)
297			rid = glGetUniformLocationARB (program_object::cur->id, name);
298
299			return rid;
300			}
301
302	root	1.12	program_object::program_object ()
303			{
304			id = glCreateProgramObjectARB ();
305			assert (id);
306	root	1.15
307			glAttachObjectARB (id, vsh->id);
308			glAttachObjectARB (id, fsh->id);
309	root	1.12	}
310
311			program_object::~program_object ()
312			{
313			glDeleteProgramsARB (1, &id);
314			}
315
316			void program_object::link ()
317			{
318			glLinkProgramARB (id);
319
320			GLint linked;
321			glGetObjectParameterivARB (id, GL_OBJECT_LINK_STATUS_ARB, &linked);
322
323			if (!linked)
324			{
325			char infolog[8192];
326			glGetInfoLogARB (id, 8192, NULL, infolog);
327			printf ("LINK-INFOLOG<%s>\n", infolog);
328	root	1.1	abort ();
329			}
330	root	1.19
331			uloc.clear ();
332	root	1.22	}
333
334			void program_object::enable ()
335			{
336			glUseProgramObjectARB (id);
337			//TODO: set samplers here
338			cur = this;
339			}
340
341			void program_object::disable ()
342			{
343			//TODO: clear samplers here
344			glUseProgramObjectARB (0);
345			cur = 0;
346	root	1.1	}
347
348	root	1.7	void sl_func0::begin () const
349			{
350			cur->append_string (name_par);
351			}
352
353	root	1.8	void sl_func0::comma () const
354			{
355	root	1.23	cur->append (compile::str_comma);
356	root	1.8	}
357
358	root	1.7	void sl_func0::end () const
359			{
360	root	1.25	cur->append_const (")");
361	root	1.7	}
362
363	root	1.6	void sl_float::operator ()() const
364			{
365			char s[20];
366			sprintf (s, "%g", c);
367			cur->append_string (s);
368			}
369
370	root	1.9	const sl_convert< ::vec2 >::T sl_convert< ::vec2 >::convert (const ::vec2 &v)
371	root	1.6	{
372			sl_string<60> s;
373			sprintf (s.str, "vec2 (%g, %g)", v.x, v.y);
374			return s;
375			}
376
377	root	1.9	const sl_convert< ::vec3 >::T sl_convert< ::vec3 >::convert (const ::vec3 &v)
378	root	1.6	{
379			sl_string<80> s;
380			sprintf (s.str, "vec3 (%g, %g, %g)", v.x, v.y, v.z);
381			return s;
382			}
383
384	root	1.9	const sl_convert< ::vec4 >::T sl_convert< ::vec4 >::convert (const ::vec4 &v)
385	root	1.6	{
386			sl_string<100> s;
387			sprintf (s.str, "vec4 (%g, %g, %g, %g)", v.x, v.y, v.z, v.w);
388			return s;
389			}
390
391	root	1.23	namespace compile {
392	root	1.5
393	root	1.23	const fragment_const_string str_2sp (" ");
394			const fragment_const_string str_equal (" = ");
395			const fragment_const_string str_comma (", ");
396			const fragment_const_string str_endl (";\n");
397	root	1.5	}
398
399	root	1.1	void debdebdebdebug ()//D
400			{
401	root	1.20	return;
402
403	root	1.23	using namespace compile;
404
405	root	1.1	vertex_shader vsh;
406
407			vsh->start ();
408
409			temp_4f lightpos;
410	root	1.18	temp_4f wpos;
411	root	1.1
412	root	1.13	lightpos = vec4 (0, 10, 0, 1);
413	root	1.23	wpos = model_view_matrix * vin.vertex;
414			vout.position = vin.vertex * model_view_matrix_inverse;
415	root	1.7	vout.tex_coord[0] = vin.tex_coord[0];
416	root	1.18	vout.tex_coord[1] = normalize (lightpos - wpos);
417			vout.tex_coord[2] = normalize (wpos);
418	root	1.23	//vout.tex_coord[3] = normalize (xyz (model_view_matrix_inverse_transpose) * vin.normal);
419			//vout.tex_coord[4] = normalize (xyz (projection_matrix_inverse_transpose) - wpos);
420	root	1.1
421			vsh->end ();
422	root	1.13	vsh->compile ();
423	root	1.10
424			fragment_shader fsh;
425
426			fsh->start ();
427
428	root	1.11	xyz (fout.frag_color) = noise3 (x (fin.frag_coord) * y (fin.frag_coord));
429
430	root	1.10	temp_1f spec_expon;
431			spec_expon = 200;
432
433			fsh->end ();
434			fsh->compile ();
435
436	root	1.11	//abort ();
437	root	1.1	}
438
439			}
440