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 ()
  {
  }

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

  temporary_i::temporary_i (const char *strtype)
  : var_i (strtype)
  {
    sprintf (name, "T%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 stream_i::build_decl (ostringstream &b)
  {
    b << 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);
  }

  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
  }

  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 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<uniform>::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
  {
   compile::str_rpar ();
  }

  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");

    const sl_append_const_string str_plus  (" + "); 
    const sl_append_const_string str_minus (" - "); 
    const sl_append_const_string str_mul   (" * "); 
    const sl_append_const_string str_div   (" / "); 
    const sl_append_const_string str_mod   (" % "); 

    const sl_append_const_string str_lt    (" < ");
    const sl_append_const_string str_lte   (" <= ");
    const sl_append_const_string str_eq    (" == ");
    const sl_append_const_string str_ne    (" != ");
    const sl_append_const_string str_gte   (" >= ");
    const sl_append_const_string str_gt    (" > ");

    const sl_append_const_string str_lpar  ("(");
    const sl_append_const_string str_rpar  (")");

    void swizzle_mask (sl_string<7> &s, int mask)
    {
      static const char channel[4] = { 'x', 'y', 'z', 'w' };

      char *str = s.str;

      *str++ = ')';
      *str++ = '.';

      while (mask)
        {
          int c = mask % 5;
          mask /= 5;

          if (c)
            *str++ = channel[c - 1];
        }

      *str++ = 0;
    }
  }

  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:	1.23
Committed:	Sat Oct 30 00:17:28 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+49 -38 lines
Log Message:	* empty log message *
#	Content
1	#include <cassert>
2
3	#include "shader.h"
4	#include "shader_vars.h"
5
6	#include <sstream>
7	#include <iomanip>
8
9	namespace shader {
10
11	using namespace std;
12
13	refcounted::~refcounted ()
14	{
15	if (refcnt)
16	abort ();
17	}
18
19	void refcounted::refcnt_dec () const
20	{
21	if (!--refcnt)
22	delete this; // quite a bit of code...
23	}
24
25	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	stream_i::stream_i (const char *strtype)
55	: var_i (strtype)
56	{
57	sprintf (name, "V%d", ++next_id);
58	}
59
60	temporary_i::temporary_i (const char *strtype)
61	: var_i (strtype)
62	{
63	sprintf (name, "T%d", ++next_id);
64	}
65
66	uniform_i::uniform_i (const char *strtype)
67	: var_i (strtype)
68	{
69	sprintf (name, "U%d", ++next_id);
70	}
71
72	fragment_string_i::~fragment_string_i ()
73	{
74	free (str);
75	}
76
77	////////////////////////////////////////////////////////////////////////////
78
79	void var_i::build_decl (ostringstream &b)
80	{
81	b << typestr << ' ' << name;
82	}
83
84	void uniform_i::build_decl (ostringstream &b)
85	{
86	b << "uniform " << typestr << ' ' << name;
87	}
88
89	void stream_i::build_decl (ostringstream &b)
90	{
91	b << typestr << ' ' << name;
92	}
93
94	////////////////////////////////////////////////////////////////////////////
95
96	void gluvar_i::build (shader_builder &b)
97	{
98	b << name;
99	}
100
101	void var_i::build (shader_builder &b)
102	{
103	b << name;
104	}
105
106	void uniform_i::build (shader_builder &b)
107	{
108	var_i::build (b);
109
110	if (find (b.refs.begin (), b.refs.end (), uniform (*this)) == b.refs.end ())
111	b.refs.push_back (*this);
112	}
113
114	void stream_i::build (shader_builder &b)
115	{
116	var_i::build (b);
117
118	#if 0
119	if (find (b.streams.begin (), b.streams.end (), var (*this)) == b.streams.end ())
120	b.streams.push_back (*this);
121	#endif
122	}
123
124	void temporary_i::build (shader_builder &b)
125	{
126	var_i::build (b);
127
128	if (find (b.temps.begin (), b.temps.end (), var (*this)) == b.temps.end ())
129	b.temps.push_back (*this);
130	}
131
132	void fragment_vector_i::build (shader_builder &b)
133	{
134	for (vector<fragment>::iterator i = begin (); i != end (); i++)
135	(*i)->build (b);
136	}
137
138	void fragment_const_string_i::build (shader_builder &b)
139	{
140	b << str;
141	}
142
143	void fragment_string_i::build (shader_builder &b)
144	{
145	b << str;
146	}
147
148	#if 0
149	void statement_i::build (shader_builder &b)
150	{
151	b << " ";
152	fragment_vector_i::build (b);
153	b << ";\n";
154	}
155	#endif
156
157	////////////////////////////////////////////////////////////////////////////
158
159	int texture_units::unit_count = 8;
160	int texture_units::units[8] = { 7, 6, 5, 4, 3, 2, 1, 0 };
161
162	shader_object_i *cur = 0;
163
164	shader_object_i::shader_object_i (GLenum type)
165	: type (type)
166	{
167	id = glCreateShaderObjectARB (type);
168	assert (id);
169	}
170
171	shader_object_i::~shader_object_i ()
172	{
173	glDeleteObjectARB (id);
174	}
175
176	void shader_object_i::start ()
177	{
178	clear ();
179	cur = this;
180	}
181
182	void shader_object_i::stop ()
183	{
184	cur = 0;
185	}
186
187	string shader_object_i::source ()
188	{
189	shader_builder b;
190	build (b);
191	ostringstream os;
192
193	for (vector<uniform>::iterator i = b.refs.begin (); i != b.refs.end (); i++)
194	{
195	(*i)->build_decl (os);
196	os << ";\n";
197	}
198
199	#if 0
200	// not neccessary right now, as GLSL is rich on predefinitions
201	for (vector<var>::iterator i = b.streams.begin (); i != b.streams.end (); i++)
202	{
203	os << "attribute ";
204	(*i)->build_decl (os);
205	os << ";\n";
206	}
207	#endif
208
209	os << "\nvoid main (void)\n{\n";
210
211	for (vector<var>::iterator i = b.temps.begin (); i != b.temps.end (); i++)
212	{
213	os << " ";
214	(*i)->build_decl (os);
215	os << ";\n";
216	}
217
218	os << "\n";
219	os << b.source.str ();
220	os << "}\n";
221
222	return os.str ();
223	}
224
225	static string linify (const string &s)
226	{
227	ostringstream o;
228
229	int b = 0, e;
230	int l = 1;
231	do {
232	o << setw (3) << l << ": ";
233	e = s.find ('\n', b);
234	if (e == string::npos)
235	e = s.size ();
236
237	o << s.substr (b, e - b + 1);
238	b = e + 1;
239	l++;
240	} while (b < s.size ());
241
242	return o.str ();
243	}
244
245	void shader_object_i::compile ()
246	{
247	string src = source ();
248	const char *sptr = src.data ();
249	const int slen = src.size ();
250
251	printf ("%s\n", linify (src).c_str ());
252	glShaderSourceARB (id, 1, &sptr, &slen);
253	glCompileShaderARB (id);
254
255	GLint compiled;
256	glGetObjectParameterivARB (id, GL_OBJECT_COMPILE_STATUS_ARB, &compiled);
257
258	if (!compiled)
259	{
260	char infolog[8192];
261	glGetInfoLogARB (id, 8192, NULL, infolog);
262	printf ("%s\n", linify (src).c_str ());
263	printf ("%s\n", infolog);
264	abort ();
265	}
266	}
267
268	////////////////////////////////////////////////////////////////////////////
269
270	program_object *program_object::cur = 0;
271
272	GLint uniform_i::location ()
273	{
274	assert (program_object::cur);
275
276	GLint &rid = program_object::cur->uloc[this];
277
278	if (!rid)
279	rid = glGetUniformLocationARB (program_object::cur->id, name);
280
281	return rid;
282	}
283
284	program_object::program_object ()
285	{
286	id = glCreateProgramObjectARB ();
287	assert (id);
288
289	glAttachObjectARB (id, vsh->id);
290	glAttachObjectARB (id, fsh->id);
291	}
292
293	program_object::~program_object ()
294	{
295	glDeleteProgramsARB (1, &id);
296	}
297
298	void program_object::link ()
299	{
300	glLinkProgramARB (id);
301
302	GLint linked;
303	glGetObjectParameterivARB (id, GL_OBJECT_LINK_STATUS_ARB, &linked);
304
305	if (!linked)
306	{
307	char infolog[8192];
308	glGetInfoLogARB (id, 8192, NULL, infolog);
309	printf ("LINK-INFOLOG<%s>\n", infolog);
310	abort ();
311	}
312
313	uloc.clear ();
314	}
315
316	void program_object::enable ()
317	{
318	glUseProgramObjectARB (id);
319	//TODO: set samplers here
320	cur = this;
321	}
322
323	void program_object::disable ()
324	{
325	//TODO: clear samplers here
326	glUseProgramObjectARB (0);
327	cur = 0;
328	}
329
330	void sl_func0::begin () const
331	{
332	cur->append_string (name_par);
333	}
334
335	void sl_func0::comma () const
336	{
337	cur->append (compile::str_comma);
338	}
339
340	void sl_func0::end () const
341	{
342	compile::str_rpar ();
343	}
344
345	void sl_float::operator ()() const
346	{
347	char s[20];
348	sprintf (s, "%g", c);
349	cur->append_string (s);
350	}
351
352	const sl_convert< ::vec2 >::T sl_convert< ::vec2 >::convert (const ::vec2 &v)
353	{
354	sl_string<60> s;
355	sprintf (s.str, "vec2 (%g, %g)", v.x, v.y);
356	return s;
357	}
358
359	const sl_convert< ::vec3 >::T sl_convert< ::vec3 >::convert (const ::vec3 &v)
360	{
361	sl_string<80> s;
362	sprintf (s.str, "vec3 (%g, %g, %g)", v.x, v.y, v.z);
363	return s;
364	}
365
366	const sl_convert< ::vec4 >::T sl_convert< ::vec4 >::convert (const ::vec4 &v)
367	{
368	sl_string<100> s;
369	sprintf (s.str, "vec4 (%g, %g, %g, %g)", v.x, v.y, v.z, v.w);
370	return s;
371	}
372
373	namespace compile {
374
375	const fragment_const_string str_2sp (" ");
376	const fragment_const_string str_equal (" = ");
377	const fragment_const_string str_comma (", ");
378	const fragment_const_string str_endl (";\n");
379
380	const sl_append_const_string str_plus (" + ");
381	const sl_append_const_string str_minus (" - ");
382	const sl_append_const_string str_mul (" * ");
383	const sl_append_const_string str_div (" / ");
384	const sl_append_const_string str_mod (" % ");
385
386	const sl_append_const_string str_lt (" < ");
387	const sl_append_const_string str_lte (" <= ");
388	const sl_append_const_string str_eq (" == ");
389	const sl_append_const_string str_ne (" != ");
390	const sl_append_const_string str_gte (" >= ");
391	const sl_append_const_string str_gt (" > ");
392
393	const sl_append_const_string str_lpar ("(");
394	const sl_append_const_string str_rpar (")");
395
396	void swizzle_mask (sl_string<7> &s, int mask)
397	{
398	static const char channel[4] = { 'x', 'y', 'z', 'w' };
399
400	char *str = s.str;
401
402	*str++ = ')';
403	*str++ = '.';
404
405	while (mask)
406	{
407	int c = mask % 5;
408	mask /= 5;
409
410	if (c)
411	*str++ = channel[c - 1];
412	}
413
414	*str++ = 0;
415	}
416	}
417
418	void debdebdebdebug ()//D
419	{
420	return;
421
422	using namespace compile;
423
424	vertex_shader vsh;
425
426	vsh->start ();
427
428	temp_4f lightpos;
429	temp_4f wpos;
430
431	lightpos = vec4 (0, 10, 0, 1);
432	wpos = model_view_matrix * vin.vertex;
433	vout.position = vin.vertex * model_view_matrix_inverse;
434	vout.tex_coord[0] = vin.tex_coord[0];
435	vout.tex_coord[1] = normalize (lightpos - wpos);
436	vout.tex_coord[2] = normalize (wpos);
437	//vout.tex_coord[3] = normalize (xyz (model_view_matrix_inverse_transpose) * vin.normal);
438	//vout.tex_coord[4] = normalize (xyz (projection_matrix_inverse_transpose) - wpos);
439
440	vsh->end ();
441	vsh->compile ();
442
443	fragment_shader fsh;
444
445	fsh->start ();
446
447	xyz (fout.frag_color) = noise3 (x (fin.frag_coord) * y (fin.frag_coord));
448
449	temp_1f spec_expon;
450	spec_expon = 200;
451
452	fsh->end ();
453	fsh->compile ();
454
455	//abort ();
456	}
457
458	}
459