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_destroy () 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 *domainstr, const char *typestr)
  : domainstr (domainstr), 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 (0, strtype)
  {
    sprintf (name, "T%d", ++next_id);
  }

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

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

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

  void var_i::operator ()() const
  {
    shader_builder::cur->code << name;

    if (shader_builder::cur->first (this))
      {
        if (domainstr)
          shader_builder::cur->global << domainstr << ' ' << typestr << ' ' << name << ";\n";
        else
          shader_builder::cur->local << "  " << typestr << ' ' << name << ";\n";
      }
  }

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

  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);
  }

  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 ();
  }

  ////////////////////////////////////////////////////////////////////////////
  
  GLint uniform_i::location ()
  {
    assert (program_object_i::cur);

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

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

    return rid;
  }

  program_object_i *program_object_i::cur;

  program_object_i::program_object_i ()
  {
    id = glCreateProgramObjectARB ();
    assert (id);
  }

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

  void program_object_i::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_i::enable ()
  {
    if (this != cur)
      {
        glUseProgramObjectARB (id);
        //TODO: set samplers here?
        cur = this;
      }
  }

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

  static map<string, program_object> progcache;

  program_object get_program (const string &vsh, const string &fsh)
  {
    string idx = vsh + "\0" + fsh;

    map<string, program_object>::iterator i = progcache.find (idx);

    if (i != progcache.end ())
      return i->second;

    program_object p;

    if (vsh.size ())
      {
        vertex_shader sh;
        p->attach (sh);
        sh->compile (vsh);
      }

    if (fsh.size ())
      {
        fragment_shader sh;
        p->attach (sh);
        sh->compile (fsh);
      }

    p->link ();

    progcache.insert (pair<string, program_object> (idx, p));

    return p;
  }

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

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

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

  shader_builder *shader_builder::cur = 0;

  bool shader_builder::first (const void *p)
  {
    if (seen.find (p) == seen.end ())
      {
        seen.insert (p);
        return true;
      }

    return false;
  }

  void shader_builder::start ()
  {
    cur = new shader_builder;
    cur->code << scientific;
  }

  string shader_builder::stop ()
  {
    ostringstream os;

    os << cur->global.str ()
       << "\nvoid main (void)\n"
       << "{\n"
       << cur->local.str ()
       << "\n"
       << cur->code.str ()
       << "}\n";

    delete cur;
    cur = 0;

    return os.str ();
  }

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

    printf ("%s\n", linify (source).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 (source).c_str ());
        printf ("%s\n", infolog);
        abort ();
      }
  }

}

Revision:	1.32
Committed:	Wed Jan 25 22:48:02 2006 UTC (18 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.31:	+4 -3 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_destroy () 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 domainstr, const char typestr)
46	: domainstr (domainstr), typestr (typestr)
47	{
48	}
49
50	var_i::~var_i ()
51	{
52	}
53
54	#if 0
55	stream_i::stream_i (const char *strtype)
56	: var_i (strtype)
57	{
58	sprintf (name, "V%d", ++next_id);
59	}
60	#endif
61
62	temporary_i::temporary_i (const char *strtype)
63	: var_i (0, strtype)
64	{
65	sprintf (name, "T%d", ++next_id);
66	}
67
68	varying_i::varying_i (const char *strtype)
69	: var_i ("varying", strtype)
70	{
71	sprintf (name, "V%d", ++next_id);
72	}
73
74	uniform_i::uniform_i (const char *strtype)
75	: var_i ("uniform", strtype)
76	{
77	sprintf (name, "U%d", ++next_id);
78	}
79
80	////////////////////////////////////////////////////////////////////////////
81
82	void var_i::operator ()() const
83	{
84	shader_builder::cur->code << name;
85
86	if (shader_builder::cur->first (this))
87	{
88	if (domainstr)
89	shader_builder::cur->global << domainstr << ' ' << typestr << ' ' << name << ";\n";
90	else
91	shader_builder::cur->local << " " << typestr << ' ' << name << ";\n";
92	}
93	}
94
95	////////////////////////////////////////////////////////////////////////////
96
97	int texture_units::unit_count = 8;
98	int texture_units::units[8] = { 7, 6, 5, 4, 3, 2, 1, 0 };
99
100	shader_object_i *cur = 0;
101
102	shader_object_i::shader_object_i (GLenum type)
103	: type (type)
104	{
105	id = glCreateShaderObjectARB (type);
106	assert (id);
107	}
108
109	shader_object_i::~shader_object_i ()
110	{
111	glDeleteObjectARB (id);
112	}
113
114	static string linify (const string &s)
115	{
116	ostringstream o;
117
118	int b = 0, e;
119	int l = 1;
120	do {
121	o << setw (3) << l << ": ";
122	e = s.find ('\n', b);
123	if (e == string::npos)
124	e = s.size ();
125
126	o << s.substr (b, e - b + 1);
127	b = e + 1;
128	l++;
129	} while (b < s.size ());
130
131	return o.str ();
132	}
133
134	////////////////////////////////////////////////////////////////////////////
135
136	GLint uniform_i::location ()
137	{
138	assert (program_object_i::cur);
139
140	GLint &rid = program_object_i::cur->uloc[this];
141
142	if (!rid)
143	rid = glGetUniformLocationARB (program_object_i::cur->id, name);
144
145	return rid;
146	}
147
148	program_object_i *program_object_i::cur;
149
150	program_object_i::program_object_i ()
151	{
152	id = glCreateProgramObjectARB ();
153	assert (id);
154	}
155
156	program_object_i::~program_object_i ()
157	{
158	glDeleteProgramsARB (1, &id);
159	}
160
161	void program_object_i::link ()
162	{
163	glLinkProgramARB (id);
164
165	GLint linked;
166	glGetObjectParameterivARB (id, GL_OBJECT_LINK_STATUS_ARB, &linked);
167
168	if (!linked)
169	{
170	char infolog[8192];
171	glGetInfoLogARB (id, 8192, NULL, infolog);
172	printf ("LINK-INFOLOG<%s>\n", infolog);
173	abort ();
174	}
175
176	uloc.clear ();
177	}
178
179	void program_object_i::enable ()
180	{
181	if (this != cur)
182	{
183	glUseProgramObjectARB (id);
184	//TODO: set samplers here?
185	cur = this;
186	}
187	}
188
189	void program_object_i::disable ()
190	{
191	//TODO: clear samplers here?
192	glUseProgramObjectARB (0);
193	cur = 0;
194	}
195
196	static map<string, program_object> progcache;
197
198	program_object get_program (const string &vsh, const string &fsh)
199	{
200	string idx = vsh + "\0" + fsh;
201
202	map<string, program_object>::iterator i = progcache.find (idx);
203
204	if (i != progcache.end ())
205	return i->second;
206
207	program_object p;
208
209	if (vsh.size ())
210	{
211	vertex_shader sh;
212	p->attach (sh);
213	sh->compile (vsh);
214	}
215
216	if (fsh.size ())
217	{
218	fragment_shader sh;
219	p->attach (sh);
220	sh->compile (fsh);
221	}
222
223	p->link ();
224
225	progcache.insert (pair<string, program_object> (idx, p));
226
227	return p;
228	}
229
230	const sl_expr< sl_string<60> > sl_convert< ::vec2 >::convert (const ::vec2 &v)
231	{
232	sl_string<60> s;
233	sprintf (s.str, "vec2 (%e, %e)", v.x, v.y);
234	return s;
235	}
236
237	const sl_expr< sl_string<80> > sl_convert< ::vec3 >::convert (const ::vec3 &v)
238	{
239	sl_string<80> s;
240	sprintf (s.str, "vec3 (%e, %e, %e)", v.x, v.y, v.z);
241	return s;
242	}
243
244	const sl_expr< sl_string<100> > sl_convert< ::vec4 >::convert (const ::vec4 &v)
245	{
246	sl_string<100> s;
247	sprintf (s.str, "vec4 (%e, %e, %e, %e)", v.x, v.y, v.z, v.w);
248	return s;
249	}
250
251	shader_builder *shader_builder::cur = 0;
252
253	bool shader_builder::first (const void *p)
254	{
255	if (seen.find (p) == seen.end ())
256	{
257	seen.insert (p);
258	return true;
259	}
260
261	return false;
262	}
263
264	void shader_builder::start ()
265	{
266	cur = new shader_builder;
267	cur->code << scientific;
268	}
269
270	string shader_builder::stop ()
271	{
272	ostringstream os;
273
274	os << cur->global.str ()
275	<< "\nvoid main (void)\n"
276	<< "{\n"
277	<< cur->local.str ()
278	<< "\n"
279	<< cur->code.str ()
280	<< "}\n";
281
282	delete cur;
283	cur = 0;
284
285	return os.str ();
286	}
287
288	void shader_object_i::compile (const string &source)
289	{
290	const char *sptr = source.data ();
291	const int slen = source.size ();
292
293	printf ("%s\n", linify (source).c_str ());
294	glShaderSourceARB (id, 1, &sptr, &slen);
295	glCompileShaderARB (id);
296
297	GLint compiled;
298	glGetObjectParameterivARB (id, GL_OBJECT_COMPILE_STATUS_ARB, &compiled);
299
300	if (!compiled)
301	{
302	char infolog[8192];
303	glGetInfoLogARB (id, 8192, NULL, infolog);
304	printf ("%s\n", linify (source).c_str ());
305	printf ("%s\n", infolog);
306	abort ();
307	}
308	}
309
310	}
311