/
mojoshader_opengl.c
1172 lines (964 loc) · 36.4 KB
1
2
3
4
5
6
7
8
9
/**
* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
10
11
12
13
14
15
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
16
17
18
19
20
#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h> // GL headers need this for WINGDIAPI definition.
#endif
21
#include "mojoshader.h"
22
#define GL_GLEXT_LEGACY 1
23
24
#include "GL/gl.h"
#include "GL/glext.h"
25
26
27
28
// Get basic wankery out of the way here...
typedef unsigned int uint; // this is a printf() helper. don't use for code.
29
30
31
32
33
34
#ifdef _MSC_VER
#define snprintf _snprintf
typedef unsigned __int8 uint8;
typedef unsigned __int32 uint32;
typedef unsigned __int32 int32;
35
36
37
// Warning Level 4 considered harmful. :)
#pragma warning(disable: 4100) // "unreferenced formal parameter"
#pragma warning(disable: 4389) // "signed/unsigned mismatch"
38
39
#else
#include <stdint.h>
40
41
42
typedef uint8_t uint8;
typedef uint32_t uint32;
typedef int32_t int32;
43
44
45
#endif
#define STATICARRAYLEN(x) ( (sizeof ((x))) / (sizeof ((x)[0])) )
46
47
48
49
50
#ifndef SUPPORT_PROFILE_GLSL
#define SUPPORT_PROFILE_GLSL 1
#endif
51
52
53
54
#ifndef SUPPORT_PROFILE_ARB1
#define SUPPORT_PROFILE_ARB1 1
#endif
55
56
57
struct MOJOSHADER_glShader
{
const MOJOSHADER_parseData *parseData;
58
GLuint handle;
59
60
61
uint32 refcount;
};
62
63
typedef struct
{
64
MOJOSHADER_shaderType shader_type;
65
const MOJOSHADER_uniform *uniform;
66
GLuint location;
67
68
} UniformMap;
69
70
71
72
73
74
75
typedef struct
{
MOJOSHADER_shaderType shader_type;
const MOJOSHADER_sampler *sampler;
GLuint location;
} SamplerMap;
76
77
typedef struct
{
78
const MOJOSHADER_attribute *attribute;
79
GLuint location;
80
81
} AttributeMap;
82
83
struct MOJOSHADER_glProgram
{
84
85
MOJOSHADER_glShader *vertex;
MOJOSHADER_glShader *fragment;
86
GLuint handle;
87
88
uint32 constant_count; // !!! FIXME: misnamed.
GLfloat *constants; // !!! FIXME: misnamed.
89
uint32 uniform_count;
90
UniformMap *uniforms;
91
92
uint32 sampler_count;
SamplerMap *samplers;
93
uint32 attribute_count;
94
AttributeMap *attributes;
95
96
97
uint32 refcount;
};
98
99
100
101
#ifndef WINGDIAPI
#define WINGDIAPI
#endif
102
// Entry points in base OpenGL that lack function pointer prototypes...
103
104
typedef WINGDIAPI void (APIENTRYP PFNGLGETINTEGERVPROC) (GLenum pname, GLint *params);
typedef WINGDIAPI const GLubyte * (APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
105
106
107
108
109
110
111
112
113
114
struct MOJOSHADER_glContext
{
// Allocators...
MOJOSHADER_malloc malloc_fn;
MOJOSHADER_free free_fn;
void *malloc_data;
// The constant register files...
// Man, it kills me how much memory this takes...
115
116
117
118
119
120
GLfloat vs_reg_file_f[8192 * 4];
GLint vs_reg_file_i[2047 * 4];
GLint vs_reg_file_b[2047];
GLfloat ps_reg_file_f[8192 * 4];
GLint ps_reg_file_i[2047 * 4];
GLint ps_reg_file_b[2047];
121
GLuint sampler_reg_file[16];
122
123
124
125
126
// GL stuff...
int opengl_major;
int opengl_minor;
MOJOSHADER_glProgram *bound_program;
127
char profile[16];
128
129
130
// Extensions...
int have_base_opengl;
131
132
int have_GL_ARB_vertex_program;
int have_GL_ARB_fragment_program;
133
134
135
136
137
138
139
140
int have_GL_ARB_shader_objects;
int have_GL_ARB_vertex_shader;
int have_GL_ARB_fragment_shader;
int have_GL_ARB_shading_language_100;
int have_GL_NV_half_float;
// Entry points...
PFNGLGETSTRINGPROC glGetString;
141
PFNGLGETINTEGERVPROC glGetIntegerv;
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
PFNGLDELETEOBJECTARBPROC glDeleteObject;
PFNGLATTACHOBJECTARBPROC glAttachObject;
PFNGLCOMPILESHADERARBPROC glCompileShader;
PFNGLCREATEPROGRAMOBJECTARBPROC glCreateProgramObject;
PFNGLCREATESHADEROBJECTARBPROC glCreateShaderObject;
PFNGLDISABLEVERTEXATTRIBARRAYARBPROC glDisableVertexAttribArray;
PFNGLENABLEVERTEXATTRIBARRAYARBPROC glEnableVertexAttribArray;
PFNGLGETATTRIBLOCATIONARBPROC glGetAttribLocation;
PFNGLGETINFOLOGARBPROC glGetInfoLog;
PFNGLGETOBJECTPARAMETERIVARBPROC glGetObjectParameteriv;
PFNGLGETUNIFORMLOCATIONARBPROC glGetUniformLocation;
PFNGLLINKPROGRAMARBPROC glLinkProgram;
PFNGLSHADERSOURCEARBPROC glShaderSource;
PFNGLUNIFORM1IARBPROC glUniform1i;
PFNGLUNIFORM4FVARBPROC glUniform4fv;
PFNGLUNIFORM4IVARBPROC glUniform4iv;
PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObject;
PFNGLVERTEXATTRIBPOINTERARBPROC glVertexAttribPointer;
160
161
162
163
164
165
// interface for profile-specific things.
int (*profileMaxUniforms)(MOJOSHADER_shaderType shader_type);
int (*profileCompileShader)(const MOJOSHADER_parseData *pd);
void (*profileDeleteShader)(const GLuint shader);
void (*profileDeleteProgram)(const GLuint program);
166
167
};
168
169
170
171
172
173
174
175
176
177
// predeclare some profile implementation stuff...
static int impl_GLSL_MaxUniforms(MOJOSHADER_shaderType shader_type);
static int impl_GLSL_CompileShader(const MOJOSHADER_parseData *pd);
static int impl_GLSL_DeleteShader(const GLuint shader);
static int impl_ARB1_MaxUniforms(MOJOSHADER_shaderType shader_type);
static int impl_ARB1_CompileShader(const MOJOSHADER_parseData *pd);
static int impl_ARB1_DeleteShader(const GLuint shader);
178
static MOJOSHADER_glContext *ctx = NULL;
179
180
181
182
183
184
185
186
187
188
// Error state...
static char error_buffer[1024] = { '\0' };
static void set_error(const char *str)
{
snprintf(error_buffer, sizeof (error_buffer), "%s", str);
} // set_error
189
190
191
192
193
194
195
196
197
198
199
200
201
// #define this to force app to supply an allocator, so there's no reference
// to the C runtime's malloc() and free()...
#if MOJOSHADER_FORCE_ALLOCATOR
#define internal_malloc NULL
#define internal_free NULL
#else
static void *internal_malloc(int bytes, void *d) { return malloc(bytes); }
static void internal_free(void *ptr, void *d) { free(ptr); }
#endif
static inline void *Malloc(const size_t len)
{
202
void *retval = ctx->malloc_fn((int) len, ctx->malloc_data);
203
204
205
if (retval == NULL)
set_error("out of memory");
return retval;
206
207
208
209
} // Malloc
static inline void Free(void *ptr)
{
210
if (ptr != NULL)
211
ctx->free_fn(ptr, ctx->malloc_data);
212
213
214
} // Free
215
216
217
218
219
220
const char *MOJOSHADER_glGetError(void)
{
return error_buffer;
} // MOJOSHADER_glGetError
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
static void *loadsym(void *(*lookup)(const char *fn), const char *fn, int *ext)
{
void *retval = NULL;
if (lookup != NULL)
{
retval = lookup(fn);
if (retval == NULL)
{
char arbfn[64];
snprintf(arbfn, sizeof (arbfn), "%sARB", fn);
retval = lookup(arbfn);
} // if
} // if
if (retval == NULL)
*ext = 0;
return retval;
} // loadsym
static void lookup_entry_points(void *(*lookup)(const char *fnname))
{
243
#define DO_LOOKUP(ext, typ, fn) ctx->fn = (typ) loadsym(lookup, #fn, &ctx->have_##ext)
244
DO_LOOKUP(base_opengl, PFNGLGETSTRINGPROC, glGetString);
245
DO_LOOKUP(base_opengl, PFNGLGETINTEGERVPROC, glGetIntegerv);
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
DO_LOOKUP(GL_ARB_shader_objects, PFNGLDELETEOBJECTARBPROC, glDeleteObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLATTACHOBJECTARBPROC, glAttachObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLCOMPILESHADERARBPROC, glCompileShader);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLCREATEPROGRAMOBJECTARBPROC, glCreateProgramObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLCREATESHADEROBJECTARBPROC, glCreateShaderObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLGETINFOLOGARBPROC, glGetInfoLog);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLGETOBJECTPARAMETERIVARBPROC, glGetObjectParameteriv);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLGETUNIFORMLOCATIONARBPROC, glGetUniformLocation);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLLINKPROGRAMARBPROC, glLinkProgram);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLSHADERSOURCEARBPROC, glShaderSource);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM1IARBPROC, glUniform1i);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM4FVARBPROC, glUniform4fv);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM4IVARBPROC, glUniform4iv);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUSEPROGRAMOBJECTARBPROC, glUseProgramObject);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLDISABLEVERTEXATTRIBARRAYARBPROC, glDisableVertexAttribArray);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLENABLEVERTEXATTRIBARRAYARBPROC, glEnableVertexAttribArray);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLGETATTRIBLOCATIONARBPROC, glGetAttribLocation);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLVERTEXATTRIBPOINTERARBPROC, glVertexAttribPointer);
#undef DO_LOOKUP
} // lookup_entry_points
static int verify_extension(const char *ext, int have, const char *extlist,
int major, int minor)
{
if (have == 0)
return 0; // don't bother checking, we're missing an entry point.
274
275
276
else if (!ctx->have_base_opengl)
return 0; // don't bother checking, we're missing basic functionality.
277
// See if it's in the spec for this GL implementation's version.
278
279
if (major >= 0)
{
280
if ( ((ctx->opengl_major << 16) | (ctx->opengl_minor & 0xFFFF)) >=
281
282
283
((major << 16) | (minor & 0xFFFF)) )
return 1;
} // if
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
// Not available in the GL version, check the extension list.
const char *ptr = strstr(extlist, ext);
if (ptr == NULL)
return 0;
const char endchar = ptr[strlen(ext)];
if ((endchar == '\0') || (endchar == ' '))
return 1; // extension is in the list.
return 0; // just not supported, fail.
} // verify_extension
static void parse_opengl_version(const char *verstr)
{
if (verstr == NULL)
301
ctx->opengl_major = ctx->opengl_minor = 0;
302
else
303
sscanf(verstr, "%d.%d", &ctx->opengl_major, &ctx->opengl_minor);
304
305
306
} // parse_opengl_version
307
static void load_extensions(void *(*lookup)(const char *fnname))
308
{
309
310
const char *extlist = NULL;
311
ctx->have_base_opengl = 1;
312
313
ctx->have_GL_ARB_vertex_program = 1;
ctx->have_GL_ARB_fragment_program = 1;
314
315
316
317
318
ctx->have_GL_ARB_shader_objects = 1;
ctx->have_GL_ARB_vertex_shader = 1;
ctx->have_GL_ARB_fragment_shader = 1;
ctx->have_GL_ARB_shading_language_100 = 1;
ctx->have_GL_NV_half_float = 1;
319
320
321
lookup_entry_points(lookup);
322
if (!ctx->have_base_opengl)
323
set_error("missing basic OpenGL entry points");
324
325
326
327
328
else
{
parse_opengl_version((const char *) ctx->glGetString(GL_VERSION));
extlist = (const char *) ctx->glGetString(GL_EXTENSIONS);
} // else
329
330
331
332
333
if (extlist == NULL)
extlist = ""; // just in case.
#define VERIFY_EXT(ext, major, minor) \
334
ctx->have_##ext = verify_extension(#ext, ctx->have_##ext, extlist, major, minor)
335
336
337
VERIFY_EXT(GL_ARB_vertex_program, -1, -1);
VERIFY_EXT(GL_ARB_fragment_program, -1, -1);
338
339
340
341
VERIFY_EXT(GL_ARB_shader_objects, 2, 0);
VERIFY_EXT(GL_ARB_vertex_shader, 2, 0);
VERIFY_EXT(GL_ARB_fragment_shader, 2, 0);
VERIFY_EXT(GL_ARB_shading_language_100, 2, 0);
342
VERIFY_EXT(GL_NV_half_float, -1, -1);
343
344
#undef VERIFY_EXT
345
346
347
348
349
350
351
} // load_extensions
static int valid_profile(const char *profile)
{
if (!ctx->have_base_opengl)
return 0;
352
353
354
#define MUST_HAVE(p, x) \
if (!ctx->have_##x) { set_error(#p " profile needs " #x); return 0; }
355
356
357
358
359
360
if (profile == NULL)
{
set_error("NULL profile");
return 0;
} // if
361
362
363
364
365
366
367
368
369
#if SUPPORT_PROFILE_ARB1
else if (strcmp(profile, MOJOSHADER_PROFILE_ARB1) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_ARB1, GL_ARB_vertex_program);
MUST_HAVE(MOJOSHADER_PROFILE_ARB1, GL_ARB_fragment_program);
} // else if
#endif
370
371
#if SUPPORT_PROFILE_GLSL
else if (strcmp(profile, MOJOSHADER_PROFILE_GLSL) == 0)
372
{
373
374
375
376
377
378
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_shader_objects);
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_vertex_shader);
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_fragment_shader);
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_shading_language_100);
} // else if
#endif
379
380
381
else
{
382
set_error("unknown or unsupported profile");
383
384
385
return 0;
} // else
386
#undef MUST_HAVE
387
388
return 1;
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
} // valid_profile
const char *MOJOSHADER_glBestProfile(void *(*lookup)(const char *fnname))
{
const char *retval = NULL;
MOJOSHADER_glContext _ctx;
MOJOSHADER_glContext *current_ctx = ctx;
ctx = &_ctx;
memset(ctx, '\0', sizeof (MOJOSHADER_glContext));
load_extensions(lookup);
if (ctx->have_base_opengl)
{
static const char *priority[] = {
MOJOSHADER_PROFILE_GLSL,
406
MOJOSHADER_PROFILE_ARB1,
407
408
409
410
411
412
413
414
415
416
417
};
int i;
for (i = 0; i < STATICARRAYLEN(priority); i++)
{
if (valid_profile(priority[i]))
{
retval = priority[i];
break;
} // if
} // for
418
419
420
421
if (retval == NULL)
set_error("no profiles available");
} // if
422
423
424
425
426
427
428
ctx = current_ctx;
return retval;
} // MOJOSHADER_glBestProfile
MOJOSHADER_glContext *MOJOSHADER_glCreateContext(const char *profile,
429
430
431
void *(*lookup)(const char *fnname),
MOJOSHADER_malloc m, MOJOSHADER_free f,
void *d)
432
{
433
MOJOSHADER_glContext *retval = NULL;
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
MOJOSHADER_glContext *current_ctx = ctx;
ctx = NULL;
if (m == NULL) m = internal_malloc;
if (f == NULL) f = internal_free;
ctx = (MOJOSHADER_glContext *) m(sizeof (MOJOSHADER_glContext), d);
if (ctx == NULL)
{
set_error("out of memory");
goto init_fail;
} // if
memset(ctx, '\0', sizeof (MOJOSHADER_glContext));
ctx->malloc_fn = m;
ctx->free_fn = f;
ctx->malloc_data = d;
451
snprintf(ctx->profile, sizeof (ctx->profile), "%s", profile);
452
453
454
load_extensions(lookup);
if (!valid_profile(profile))
455
goto init_fail;
456
457
458
MOJOSHADER_glBindProgram(NULL);
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
// !!! FIXME: generalize this part.
if (profile == NULL) {}
#if SUPPORT_PROFILE_GLSL
else if (strcmp(profile, MOJOSHADER_PROFILE_GLSL) == 0)
{
ctx->profileMaxUniforms = impl_GLSL_MaxUniforms;
ctx->profileCompileShader = impl_GLSL_CompileShader;
ctx->profileDeleteShader = impl_GLSL_DeleteShader;
ctx->profileDeleteProgram = impl_GLSL_DeleteProgram;
} // if
#endif
#if SUPPORT_PROFILE_ARB1
else if (strcmp(profile, MOJOSHADER_PROFILE_ARB1) == 0)
{
ctx->profileMaxUniforms = impl_ARB1_MaxUniforms;
ctx->profileCompileShader = impl_ARB1_CompileShader;
ctx->profileDeleteShader = impl_ARB1_DeleteShader;
ctx->profileDeleteProgram = impl_ARB1_DeleteProgram;
} // if
#endif
assert(ctx->profileMaxUniforms != NULL);
assert(ctx->profileCompileShader != NULL);
assert(ctx->profileDeleteShader != NULL);
assert(ctx->profileDeleteProgram != NULL);
487
retval = ctx;
488
489
ctx = current_ctx;
return retval;
490
491
init_fail:
492
493
494
495
if (ctx != NULL)
f(ctx, d);
ctx = current_ctx;
return NULL;
496
} // MOJOSHADER_glCreateContext
497
498
499
500
501
502
503
504
void MOJOSHADER_glMakeContextCurrent(MOJOSHADER_glContext *_ctx)
{
ctx = _ctx;
} // MOJOSHADER_glMakeContextCurrent
505
static int impl_GLSL_MaxUniforms(MOJOSHADER_shaderType shader_type)
506
507
508
509
510
511
512
513
514
515
516
517
{
GLenum pname = GL_NONE;
GLint val = 0;
if (shader_type == MOJOSHADER_TYPE_VERTEX)
pname = GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB;
else if (shader_type == MOJOSHADER_TYPE_PIXEL)
pname = GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB;
else
return -1;
ctx->glGetIntegerv(pname, &val);
return (int) val;
518
519
520
521
522
523
} // impl_GLSL_MaxUniforms
int MOJOSHADER_glMaxUniforms(MOJOSHADER_shaderType shader_type)
{
return ctx->profileMaxUniforms(shader_type);
524
525
526
} // MOJOSHADER_glMaxUniforms
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
static int impl_GLSL_CompileShader(const MOJOSHADER_parseData *pd, GLuint *s)
{
GLint ok = 0;
GLint shaderlen = (GLint) pd->output_len;
const GLenum shader_type = (pd->shader_type == MOJOSHADER_TYPE_PIXEL) ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER;
GLuint shader = ctx->glCreateShaderObject(shader_type);
ctx->glShaderSource(shader, 1, (const GLchar **) &pd->output, &shaderlen);
ctx->glCompileShader(shader);
ctx->glGetObjectParameteriv(shader, GL_OBJECT_COMPILE_STATUS_ARB, &ok);
if (!ok)
{
GLsizei len = 0;
ctx->glGetInfoLog(shader, sizeof (error_buffer), &len,
(GLchar *) error_buffer);
*s = 0;
return 0;
} // if
*s = shader;
return 1;
} // impl_GLSL_CompileShader
static void impl_GLSL_DeleteShader(const GLuint shader)
{
ctx->glDeleteObject(shader);
} // impl_GLSL_DeleteShader
static void impl_GLSL_DeleteProgram(const GLuint program)
{
ctx->glDeleteObject(program);
} // impl_GLSL_DeleteProgram
564
565
566
567
MOJOSHADER_glShader *MOJOSHADER_glCompileShader(const unsigned char *tokenbuf,
const unsigned int bufsize)
{
MOJOSHADER_glShader *retval = NULL;
568
GLuint shader = 0;
569
570
571
572
const MOJOSHADER_parseData *pd = MOJOSHADER_parse(ctx->profile, tokenbuf,
bufsize, ctx->malloc_fn,
ctx->free_fn,
ctx->malloc_data);
573
if (pd->error != NULL)
574
575
{
set_error(pd->error);
576
goto compile_shader_fail;
577
} // if
578
579
580
retval = (MOJOSHADER_glShader *) Malloc(sizeof (MOJOSHADER_glShader));
if (retval == NULL)
581
582
goto compile_shader_fail;
583
if (!ctx->profileCompileShader(pd, &shader))
584
goto compile_shader_fail;
585
586
587
588
589
retval->parseData = pd;
retval->handle = shader;
retval->refcount = 1;
return retval;
590
591
592
593
594
compile_shader_fail:
MOJOSHADER_freeParseData(pd);
Free(retval);
if (shader != 0)
595
ctx->profileDeleteShader(shader);
596
return NULL;
597
598
599
} // MOJOSHADER_glCompileShader
600
601
602
603
604
605
606
const MOJOSHADER_parseData *MOJOSHADER_glGetShaderParseData(
MOJOSHADER_glShader *shader)
{
return (shader != NULL) ? shader->parseData : NULL;
} // MOJOSHADER_glGetShaderParseData
607
608
609
610
static void shader_unref(MOJOSHADER_glShader *shader)
{
if (shader != NULL)
{
611
const uint32 refcount = shader->refcount;
612
if (refcount > 1)
613
shader->refcount--;
614
615
else
{
616
ctx->profileDeleteShader(shader->handle);
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
MOJOSHADER_freeParseData(shader->parseData);
Free(shader);
} // else
} // if
} // shader_unref
static void program_unref(MOJOSHADER_glProgram *program)
{
if (program != NULL)
{
const uint32 refcount = program->refcount;
if (refcount > 1)
program->refcount--;
else
{
633
ctx->profileDeleteProgram(program->handle);
634
635
shader_unref(program->vertex);
shader_unref(program->fragment);
636
Free(program->constants);
637
638
639
Free(program->samplers);
Free(program->uniforms);
Free(program->attributes);
640
641
642
643
644
645
Free(program);
} // else
} // if
} // program_unref
646
647
648
649
650
static void lookup_uniforms(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader)
{
int i;
const MOJOSHADER_parseData *pd = shader->parseData;
651
const MOJOSHADER_uniform *u = pd->uniforms;
652
const MOJOSHADER_shaderType shader_type = pd->shader_type;
653
654
655
for (i = 0; i < pd->uniform_count; i++)
{
656
const GLint loc = ctx->glGetUniformLocation(program->handle, u[i].name);
657
658
659
if (loc != -1) // maybe the Uniform was optimized out?
{
UniformMap *map = &program->uniforms[program->uniform_count];
660
map->shader_type = shader_type;
661
map->uniform = &u[i];
662
map->location = (GLuint) loc;
663
664
665
666
667
668
program->uniform_count++;
} // if
} // for
} // lookup_uniforms
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
static void lookup_samplers(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader)
{
int i;
const MOJOSHADER_parseData *pd = shader->parseData;
const MOJOSHADER_sampler *s = pd->samplers;
const MOJOSHADER_shaderType shader_type = pd->shader_type;
for (i = 0; i < pd->sampler_count; i++)
{
const GLint loc = ctx->glGetUniformLocation(program->handle, s[i].name);
if (loc != -1) // maybe the Sampler was optimized out?
{
SamplerMap *map = &program->samplers[program->sampler_count];
map->shader_type = shader_type;
map->sampler = &s[i];
map->location = (GLuint) loc;
program->sampler_count++;
} // if
} // for
} // lookup_samplers
692
693
694
695
static void lookup_attributes(MOJOSHADER_glProgram *program)
{
int i;
const MOJOSHADER_parseData *pd = program->vertex->parseData;
696
const MOJOSHADER_attribute *a = pd->attributes;
697
698
699
for (i = 0; i < pd->attribute_count; i++)
{
700
const GLint loc = ctx->glGetAttribLocation(program->handle, a[i].name);
701
702
703
704
if (loc != -1) // maybe the Attribute was optimized out?
{
AttributeMap *map = &program->attributes[program->attribute_count];
map->attribute = &a[i];
705
map->location = (GLuint) loc;
706
707
708
709
710
711
program->attribute_count++;
} // if
} // for
} // lookup_attributes
712
713
714
MOJOSHADER_glProgram *MOJOSHADER_glLinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
715
716
717
if ((vshader == NULL) && (pshader == NULL))
return NULL;
718
MOJOSHADER_glProgram *retval = NULL;
719
const GLuint program = ctx->glCreateProgramObject();
720
int numregs = 0;
721
int consts = 0;
722
723
724
if (vshader != NULL) ctx->glAttachObject(program, vshader->handle);
if (pshader != NULL) ctx->glAttachObject(program, pshader->handle);
725
726
ctx->glLinkProgram(program);
727
728
GLint ok = 0;
729
ctx->glGetObjectParameteriv(program, GL_OBJECT_LINK_STATUS_ARB, &ok);
730
731
732
if (!ok)
{
GLsizei len = 0;
733
ctx->glGetInfoLog(program, sizeof (error_buffer), &len, (GLchar *) error_buffer);
734
735
goto link_program_fail;
} // if
736
737
738
retval = (MOJOSHADER_glProgram *) Malloc(sizeof (MOJOSHADER_glProgram));
if (retval == NULL)
739
740
goto link_program_fail;
memset(retval, '\0', sizeof (MOJOSHADER_glProgram));
741
742
numregs = 0;
743
744
if (vshader != NULL) numregs += vshader->parseData->uniform_count;
if (pshader != NULL) numregs += pshader->parseData->uniform_count;
745
746
747
retval->uniforms = (UniformMap *) Malloc(sizeof (UniformMap) * numregs);
if (retval->uniforms == NULL)
goto link_program_fail;
748
memset(retval->uniforms, '\0', sizeof (UniformMap) * numregs);
749
750
751
752
753
754
755
756
757
numregs = 0;
if (vshader != NULL) numregs += vshader->parseData->sampler_count;
if (pshader != NULL) numregs += pshader->parseData->sampler_count;
retval->samplers = (SamplerMap *) Malloc(sizeof (SamplerMap) * numregs);
if (retval->samplers == NULL)
goto link_program_fail;
memset(retval->samplers, '\0', sizeof (SamplerMap) * numregs);
758
759
760
761
retval->handle = program;
retval->vertex = vshader;
retval->fragment = pshader;
retval->refcount = 1;
762
763
if (vshader != NULL)
764
{
765
766
if (consts < vshader->parseData->constant_count)
consts = vshader->parseData->constant_count;
767
768
769
770
771
772
retval->attributes = (AttributeMap *) Malloc(sizeof (AttributeMap) *
vshader->parseData->attribute_count);
if (retval->attributes == NULL)
goto link_program_fail;
lookup_attributes(retval);
773
lookup_uniforms(retval, vshader);
774
lookup_samplers(retval, vshader);
775
vshader->refcount++;
776
777
} // if
778
if (pshader != NULL)
779
{
780
781
if (consts < pshader->parseData->constant_count)
consts = pshader->parseData->constant_count;
782
783
lookup_uniforms(retval, pshader);
784
lookup_samplers(retval, vshader);
785
pshader->refcount++;
786
} // if
787
788
if (consts > 0)
789
{
790
retval->constants = (GLfloat *) Malloc(sizeof (GLfloat) * consts * 4);
791
792
if (retval->constants == NULL)
goto link_program_fail;
793
retval->constant_count = (uint32) consts;
794
795
} // if
796
return retval;
797
798
799
800
link_program_fail:
if (retval != NULL)
{
801
802
Free(retval->constants);
Free(retval->samplers);
803
804
Free(retval->uniforms);
Free(retval->attributes);
805
806
807
Free(retval);
} // if
808
ctx->profileDeleteProgram(program);
809
return NULL;
810
811
812
813
814
} // MOJOSHADER_glLinkProgram
void MOJOSHADER_glBindProgram(MOJOSHADER_glProgram *program)
{
815
GLuint handle = 0;
816
int i;
817
818
if (program == ctx->bound_program)
819
820
821
return; // nothing to do.
// Disable any client-side arrays the current program could have used.
822
823
// !!! FIXME: don't disable yet...see which ones get reused, and disable
// !!! FIXME: only what we don't need in MOJOSHADER_glProgramReady().
824
if (ctx->bound_program != NULL)
825
{
826
827
const int count = ctx->bound_program->attribute_count;
for (i = 0; i < count; i++)
828
{
829
830
const AttributeMap *map = &ctx->bound_program->attributes[i];
ctx->glDisableVertexAttribArray(map->location);
831
832
833
} // if
} // for
834
835
836
837
838
839
if (program != NULL)
{
handle = program->handle;
program->refcount++;
} // if
840
841
842
ctx->glUseProgramObject(handle);
program_unref(ctx->bound_program);
ctx->bound_program = program;
843
844
845
} // MOJOSHADER_glBindProgram
846
static inline uint minuint(const uint a, const uint b)
847
{
848
849
return ((a < b) ? a : b);
} // minuint
850
851
852
void MOJOSHADER_glSetVertexShaderUniformF(unsigned int idx, const float *data,
853
unsigned int vec4n)
854
{
855
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
856
857
if (idx < maxregs)
{
858
assert(sizeof (GLfloat) == sizeof (float));
859
const uint cpy = (minuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
860
memcpy(ctx->vs_reg_file_f + (idx * 4), data, cpy);
861
} // if
862
863
864
865
} // MOJOSHADER_glSetVertexShaderUniformF
void MOJOSHADER_glSetVertexShaderUniformI(unsigned int idx, const int *data,
866
unsigned int ivec4n)
867
{
868
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_i) / 4;
869
870
if (idx < maxregs)
{
871
assert(sizeof (GLint) == sizeof (int));
872
const uint cpy = (minuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
873
memcpy(ctx->vs_reg_file_i + (idx * 4), data, cpy);
874
} // if
875
876
877
878
879
880
} // MOJOSHADER_glSetVertexShaderUniformI
void MOJOSHADER_glSetVertexShaderUniformB(unsigned int idx, const int *data,
unsigned int bcount)
{
881
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
882
883
if (idx < maxregs)
{
884
GLint *wptr = ctx->vs_reg_file_b + idx;
885
GLint *endptr = wptr + minuint(maxregs - idx, bcount);
886
887
888
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
889
890
891
892
} // MOJOSHADER_glSetVertexShaderUniformB
void MOJOSHADER_glSetPixelShaderUniformF(unsigned int idx, const float *data,
893
unsigned int vec4n)
894
{
895
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
896
897
if (idx < maxregs)
{
898
assert(sizeof (GLfloat) == sizeof (float));
899
const uint cpy = (minuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
900
memcpy(ctx->ps_reg_file_f + (idx * 4), data, cpy);
901
} // if
902
903
904
905
} // MOJOSHADER_glSetPixelShaderUniformF
void MOJOSHADER_glSetPixelShaderUniformI(unsigned int idx, const int *data,
906
unsigned int ivec4n)
907
{
908
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_i) / 4;
909
910
if (idx < maxregs)
{
911
assert(sizeof (GLint) == sizeof (int));
912
const uint cpy = (minuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
913
memcpy(ctx->ps_reg_file_i + (idx * 4), data, cpy);
914
} // if
915
916
917
918
} // MOJOSHADER_glSetPixelShaderUniformI
void MOJOSHADER_glSetPixelShaderUniformB(unsigned int idx, const int *data,
919
unsigned int bcount)
920
{
921
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
922
923
if (idx < maxregs)
{
924
GLint *wptr = ctx->ps_reg_file_b + idx;
925
GLint *endptr = wptr + minuint(maxregs - idx, bcount);
926
927
928
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
929
930
931
} // MOJOSHADER_glSetPixelShaderUniformB
932
933
934
935
936
937
938
939
void MOJOSHADER_glSetSampler(unsigned int idx, unsigned int unit)
{
const uint maxregs = STATICARRAYLEN(ctx->sampler_reg_file);
if (idx < maxregs)
ctx->sampler_reg_file[idx] = (GLuint) unit;
} // MOJOSHADER_glSetSampler
940
941
942
943
static inline GLenum opengl_attr_type(const MOJOSHADER_attributeType type)
{
switch (type)
{
944
case MOJOSHADER_ATTRIBUTE_UNKNOWN: return GL_NONE; // oh well.
945
946
947
case MOJOSHADER_ATTRIBUTE_BYTE: return GL_BYTE;
case MOJOSHADER_ATTRIBUTE_UBYTE: return GL_UNSIGNED_BYTE;
case MOJOSHADER_ATTRIBUTE_SHORT: return GL_SHORT;
948
case MOJOSHADER_ATTRIBUTE_USHORT: return GL_UNSIGNED_SHORT;
949
950
951
952
case MOJOSHADER_ATTRIBUTE_INT: return GL_INT;
case MOJOSHADER_ATTRIBUTE_UINT: return GL_UNSIGNED_INT;
case MOJOSHADER_ATTRIBUTE_FLOAT: return GL_FLOAT;
case MOJOSHADER_ATTRIBUTE_DOUBLE: return GL_DOUBLE;
953
954
case MOJOSHADER_ATTRIBUTE_HALF_FLOAT:
955
if (ctx->have_GL_NV_half_float)
956
957
return GL_HALF_FLOAT_NV;
break;
958
959
960
961
962
963
} // switch
return GL_NONE; // oh well. Raises a GL error later.
} // opengl_attr_type
964
// !!! FIXME: shouldn't (index) be unsigned?
965
966
967
968
969
970
void MOJOSHADER_glSetVertexAttribute(MOJOSHADER_usage usage,
int index, unsigned int size,
MOJOSHADER_attributeType type,
int normalized, unsigned int stride,
const void *ptr)
{
971
if ((ctx->bound_program == NULL) || (ctx->bound_program->vertex == NULL))
972
973
return;
974
975
976
const GLenum gl_type = opengl_attr_type(type);
const GLboolean norm = (normalized) ? GL_TRUE : GL_FALSE;
GLuint gl_index = 0;
977
978
979
980
// We have to map POSITION0 to generic vertex attribute 0; the
// GL_ARB_vertex_shader spec says this is equivalent to using
// glVertexPointer(), but without the limitations of that entry point.
981
982
if ((usage != MOJOSHADER_USAGE_POSITION) || (index != 0))
983
{
984
985
986
987
988
989
int i;
const int count = ctx->bound_program->attribute_count;
for (i = 0; i < count; i++)
{
const AttributeMap *map = &ctx->bound_program->attributes[i];
const MOJOSHADER_attribute *a = map->attribute;
990
991
992
// !!! FIXME: is this array guaranteed to be sorted by usage?
// !!! FIXME: if so, we can break if a->usage > usage.
993
994
995
996
997
998
999
if ((a->usage == usage) && (a->index == index))
{
gl_index = map->location;
break;
} // if
} // for
1000