/
mojoshader_opengl.c
828 lines (679 loc) · 25.4 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
16
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include "mojoshader.h"
17
#define GL_GLEXT_LEGACY 1
18
19
#include "GL/gl.h"
#include "GL/glext.h"
20
21
22
23
// Get basic wankery out of the way here...
typedef unsigned int uint; // this is a printf() helper. don't use for code.
24
25
26
27
28
29
30
31
#ifdef _MSC_VER
#define snprintf _snprintf
typedef unsigned __int8 uint8;
typedef unsigned __int32 uint32;
typedef unsigned __int32 int32;
#else
#include <stdint.h>
32
33
34
typedef uint8_t uint8;
typedef uint32_t uint32;
typedef int32_t int32;
35
36
37
#endif
#define STATICARRAYLEN(x) ( (sizeof ((x))) / (sizeof ((x)[0])) )
38
39
40
41
struct MOJOSHADER_glShader
{
const MOJOSHADER_parseData *parseData;
42
GLhandleARB handle;
43
44
45
uint32 refcount;
};
46
47
typedef struct
{
48
MOJOSHADER_shaderType shader_type;
49
const MOJOSHADER_uniform *uniform;
50
GLuint location;
51
52
} UniformMap;
53
54
typedef struct
{
55
const MOJOSHADER_attribute *attribute;
56
GLuint location;
57
58
} AttributeMap;
59
60
struct MOJOSHADER_glProgram
{
61
62
MOJOSHADER_glShader *vertex;
MOJOSHADER_glShader *fragment;
63
GLhandleARB handle;
64
uint32 uniform_count;
65
UniformMap *uniforms;
66
uint32 attribute_count;
67
AttributeMap *attributes;
68
69
70
uint32 refcount;
};
71
// Entry points in base OpenGL that lack function pointer prototypes...
72
typedef const GLubyte * (APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
73
74
75
76
77
78
79
80
81
82
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...
83
84
85
86
87
88
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];
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
// GL stuff...
int opengl_major;
int opengl_minor;
MOJOSHADER_glProgram *bound_program;
const char *profile;
// Extensions...
int have_base_opengl;
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;
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;
};
static MOJOSHADER_glContext *ctx = NULL;
127
128
129
130
131
132
133
134
135
136
// 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
137
138
139
140
141
142
143
144
145
146
147
148
149
// #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)
{
150
void *retval = ctx->malloc_fn(len, ctx->malloc_data);
151
152
153
if (retval == NULL)
set_error("out of memory");
return retval;
154
155
156
157
} // Malloc
static inline void Free(void *ptr)
{
158
if (ptr != NULL)
159
ctx->free_fn(ptr, ctx->malloc_data);
160
161
162
} // Free
163
164
165
166
167
168
const char *MOJOSHADER_glGetError(void)
{
return error_buffer;
} // MOJOSHADER_glGetError
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
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))
{
191
#define DO_LOOKUP(ext, typ, fn) ctx->fn = (typ) loadsym(lookup, #fn, &ctx->have_##ext)
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
DO_LOOKUP(base_opengl, PFNGLGETSTRINGPROC, glGetString);
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.
// See if it's in the spec for this GL implementation's version.
222
223
if (major >= 0)
{
224
if ( ((ctx->opengl_major << 16) | (ctx->opengl_minor & 0xFFFF)) >=
225
226
227
((major << 16) | (minor & 0xFFFF)) )
return 1;
} // if
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
// 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)
245
ctx->opengl_major = ctx->opengl_minor = 0;
246
else
247
sscanf(verstr, "%d.%d", &ctx->opengl_major, &ctx->opengl_minor);
248
249
250
251
252
} // parse_opengl_version
static int check_extensions(void *(*lookup)(const char *fnname))
{
253
254
255
256
257
258
ctx->have_base_opengl = 1;
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;
259
260
261
lookup_entry_points(lookup);
262
if (!ctx->have_base_opengl) // a func we should definitely have is MIA?
263
264
265
266
267
{
set_error("missing basic OpenGL entry points");
return 0;
} // if
268
parse_opengl_version((const char *) ctx->glGetString(GL_VERSION));
269
270
const char *extlist = (const char *) ctx->glGetString(GL_EXTENSIONS);
271
272
273
274
if (extlist == NULL)
extlist = ""; // just in case.
#define VERIFY_EXT(ext, major, minor) \
275
ctx->have_##ext = verify_extension(#ext, ctx->have_##ext, extlist, major, minor)
276
277
278
279
280
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);
281
VERIFY_EXT(GL_NV_half_float, -1, -1);
282
283
284
285
#undef VERIFY_EXT
#define REQUIRE_GL_EXTENSION(x) \
286
if (!ctx->have_##x) { set_error("profile requires " #x); return 0; }
287
288
if (strcmp(ctx->profile, MOJOSHADER_PROFILE_GLSL) == 0)
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
{
REQUIRE_GL_EXTENSION(GL_ARB_shader_objects);
REQUIRE_GL_EXTENSION(GL_ARB_vertex_shader);
REQUIRE_GL_EXTENSION(GL_ARB_fragment_shader);
REQUIRE_GL_EXTENSION(GL_ARB_shading_language_100);
} // if
else
{
set_error("unknown profile");
return 0;
} // else
#undef REQUIRE_GL_EXTENSION
return 1;
} // check_extensions
308
MOJOSHADER_glContext *MOJOSHADER_glCreateContext(const char *_profile,
309
310
311
void *(*lookup)(const char *fnname),
MOJOSHADER_malloc m, MOJOSHADER_free f,
void *d)
312
{
313
MOJOSHADER_glContext *retval = NULL;
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
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;
331
332
if (strcmp(_profile, MOJOSHADER_PROFILE_GLSL) == 0)
333
ctx->profile = MOJOSHADER_PROFILE_GLSL;
334
else
335
336
{
set_error("unknown profile");
337
goto init_fail;
338
} // else
339
340
341
if (!check_extensions(lookup))
goto init_fail;
342
343
344
MOJOSHADER_glBindProgram(NULL);
345
retval = ctx;
346
347
ctx = current_ctx;
return retval;
348
349
init_fail:
350
351
352
353
if (ctx != NULL)
f(ctx, d);
ctx = current_ctx;
return NULL;
354
} // MOJOSHADER_glCreateContext
355
356
357
358
359
360
361
362
void MOJOSHADER_glMakeContextCurrent(MOJOSHADER_glContext *_ctx)
{
ctx = _ctx;
} // MOJOSHADER_glMakeContextCurrent
363
364
365
366
MOJOSHADER_glShader *MOJOSHADER_glCompileShader(const unsigned char *tokenbuf,
const unsigned int bufsize)
{
MOJOSHADER_glShader *retval = NULL;
367
GLhandleARB shader = 0;
368
369
370
371
const MOJOSHADER_parseData *pd = MOJOSHADER_parse(ctx->profile, tokenbuf,
bufsize, ctx->malloc_fn,
ctx->free_fn,
ctx->malloc_data);
372
373
374
375
GLint ok = 0;
const GLenum shader_type = (pd->shader_type == MOJOSHADER_TYPE_PIXEL) ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER;
GLint shaderlen = (GLint) pd->output_len;
376
if (pd->error != NULL)
377
378
{
set_error(pd->error);
379
goto compile_shader_fail;
380
} // if
381
382
383
retval = (MOJOSHADER_glShader *) Malloc(sizeof (MOJOSHADER_glShader));
if (retval == NULL)
384
385
goto compile_shader_fail;
386
shader = ctx->glCreateShaderObject(shader_type);
387
388
389
390
ctx->glShaderSource(shader, 1, (const GLchar **) &pd->output, &shaderlen);
ctx->glCompileShader(shader);
ctx->glGetObjectParameteriv(shader, GL_OBJECT_COMPILE_STATUS_ARB, &ok);
391
392
393
394
if (!ok)
{
GLsizei len = 0;
395
ctx->glGetInfoLog(shader, sizeof (error_buffer), &len, (GLchar *) error_buffer);
396
goto compile_shader_fail;
397
398
399
400
401
402
} // if
retval->parseData = pd;
retval->handle = shader;
retval->refcount = 1;
return retval;
403
404
405
406
407
compile_shader_fail:
MOJOSHADER_freeParseData(pd);
Free(retval);
if (shader != 0)
408
ctx->glDeleteObject(shader);
409
return NULL;
410
411
412
} // MOJOSHADER_glCompileShader
413
414
415
416
417
418
419
const MOJOSHADER_parseData *MOJOSHADER_glGetShaderParseData(
MOJOSHADER_glShader *shader)
{
return (shader != NULL) ? shader->parseData : NULL;
} // MOJOSHADER_glGetShaderParseData
420
421
422
423
static void shader_unref(MOJOSHADER_glShader *shader)
{
if (shader != NULL)
{
424
const uint32 refcount = shader->refcount;
425
if (refcount > 1)
426
shader->refcount--;
427
428
else
{
429
ctx->glDeleteObject(shader->handle);
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
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
{
446
ctx->glDeleteObject(program->handle);
447
448
shader_unref(program->vertex);
shader_unref(program->fragment);
449
Free(program->attributes);
450
Free(program->uniforms);
451
452
453
454
455
456
Free(program);
} // else
} // if
} // program_unref
457
458
459
460
461
static void lookup_uniforms(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader)
{
int i;
const MOJOSHADER_parseData *pd = shader->parseData;
462
const MOJOSHADER_uniform *u = pd->uniforms;
463
const MOJOSHADER_shaderType shader_type = pd->shader_type;
464
465
466
for (i = 0; i < pd->uniform_count; i++)
{
467
const GLint loc = ctx->glGetUniformLocation(program->handle, u[i].name);
468
469
470
if (loc != -1) // maybe the Uniform was optimized out?
{
UniformMap *map = &program->uniforms[program->uniform_count];
471
map->shader_type = shader_type;
472
map->uniform = &u[i];
473
map->location = (GLuint) loc;
474
475
476
477
478
479
program->uniform_count++;
} // if
} // for
} // lookup_uniforms
480
481
482
483
static void lookup_attributes(MOJOSHADER_glProgram *program)
{
int i;
const MOJOSHADER_parseData *pd = program->vertex->parseData;
484
const MOJOSHADER_attribute *a = pd->attributes;
485
486
487
for (i = 0; i < pd->attribute_count; i++)
{
488
const GLint loc = ctx->glGetAttribLocation(program->handle, a->name);
489
490
491
492
if (loc != -1) // maybe the Attribute was optimized out?
{
AttributeMap *map = &program->attributes[program->attribute_count];
map->attribute = &a[i];
493
map->location = (GLuint) loc;
494
495
496
497
498
499
program->attribute_count++;
} // if
} // for
} // lookup_attributes
500
501
502
MOJOSHADER_glProgram *MOJOSHADER_glLinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
503
504
505
if ((vshader == NULL) && (pshader == NULL))
return NULL;
506
MOJOSHADER_glProgram *retval = NULL;
507
const GLhandleARB program = ctx->glCreateProgramObject();
508
int numregs = 0;
509
510
511
if (vshader != NULL) ctx->glAttachObject(program, vshader->handle);
if (pshader != NULL) ctx->glAttachObject(program, pshader->handle);
512
513
ctx->glLinkProgram(program);
514
515
GLint ok = 0;
516
ctx->glGetObjectParameteriv(program, GL_OBJECT_LINK_STATUS_ARB, &ok);
517
518
519
if (!ok)
{
GLsizei len = 0;
520
ctx->glGetInfoLog(program, sizeof (error_buffer), &len, (GLchar *) error_buffer);
521
522
goto link_program_fail;
} // if
523
524
525
retval = (MOJOSHADER_glProgram *) Malloc(sizeof (MOJOSHADER_glProgram));
if (retval == NULL)
526
527
goto link_program_fail;
memset(retval, '\0', sizeof (MOJOSHADER_glProgram));
528
529
530
if (vshader != NULL) numregs += vshader->parseData->uniform_count;
if (pshader != NULL) numregs += pshader->parseData->uniform_count;
531
532
533
retval->uniforms = (UniformMap *) Malloc(sizeof (UniformMap) * numregs);
if (retval->uniforms == NULL)
goto link_program_fail;
534
memset(retval->uniforms, '\0', sizeof (UniformMap) * numregs);
535
536
537
538
539
retval->handle = program;
retval->vertex = vshader;
retval->fragment = pshader;
retval->refcount = 1;
540
541
if (vshader != NULL)
542
{
543
544
545
546
547
548
retval->attributes = (AttributeMap *) Malloc(sizeof (AttributeMap) *
vshader->parseData->attribute_count);
if (retval->attributes == NULL)
goto link_program_fail;
lookup_attributes(retval);
549
lookup_uniforms(retval, vshader);
550
vshader->refcount++;
551
552
} // if
553
if (pshader != NULL)
554
555
{
lookup_uniforms(retval, pshader);
556
pshader->refcount++;
557
} // if
558
559
return retval;
560
561
562
563
link_program_fail:
if (retval != NULL)
{
564
565
Free(retval->uniforms);
Free(retval->attributes);
566
567
568
Free(retval);
} // if
569
ctx->glDeleteObject(program);
570
return NULL;
571
572
573
574
575
} // MOJOSHADER_glLinkProgram
void MOJOSHADER_glBindProgram(MOJOSHADER_glProgram *program)
{
576
GLhandleARB handle = 0;
577
int i;
578
579
if (program == ctx->bound_program)
580
581
582
return; // nothing to do.
// Disable any client-side arrays the current program could have used.
583
584
// !!! FIXME: don't disable yet...see which ones get reused, and disable
// !!! FIXME: only what we don't need in MOJOSHADER_glProgramReady().
585
if (ctx->bound_program != NULL)
586
{
587
588
const int count = ctx->bound_program->attribute_count;
for (i = 0; i < count; i++)
589
{
590
591
const AttributeMap *map = &ctx->bound_program->attributes[i];
ctx->glDisableVertexAttribArray(map->location);
592
593
594
} // if
} // for
595
596
597
598
599
600
if (program != NULL)
{
handle = program->handle;
program->refcount++;
} // if
601
602
603
ctx->glUseProgramObject(handle);
program_unref(ctx->bound_program);
ctx->bound_program = program;
604
605
606
} // MOJOSHADER_glBindProgram
607
608
609
610
611
612
static inline uint maxuint(const uint a, const uint b)
{
return ((a > b) ? a : b);
} // maxuint
613
void MOJOSHADER_glSetVertexShaderUniformF(unsigned int idx, const float *data,
614
unsigned int vec4n)
615
{
616
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
617
618
if (idx < maxregs)
{
619
assert(sizeof (GLfloat) == sizeof (float));
620
const uint cpy = (maxuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
621
memcpy(ctx->vs_reg_file_f + (idx * 4), data, cpy);
622
} // if
623
624
625
626
} // MOJOSHADER_glSetVertexShaderUniformF
void MOJOSHADER_glSetVertexShaderUniformI(unsigned int idx, const int *data,
627
unsigned int ivec4n)
628
{
629
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_i) / 4;
630
631
if (idx < maxregs)
{
632
assert(sizeof (GLint) == sizeof (int));
633
const uint cpy = (maxuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
634
memcpy(ctx->vs_reg_file_i + (idx * 4), data, cpy);
635
} // if
636
637
638
639
640
641
} // MOJOSHADER_glSetVertexShaderUniformI
void MOJOSHADER_glSetVertexShaderUniformB(unsigned int idx, const int *data,
unsigned int bcount)
{
642
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
643
644
if (idx < maxregs)
{
645
646
GLint *wptr = ctx->vs_reg_file_b + idx;
GLint *endptr = wptr + maxuint(maxregs - idx, bcount);
647
648
649
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
650
651
652
653
} // MOJOSHADER_glSetVertexShaderUniformB
void MOJOSHADER_glSetPixelShaderUniformF(unsigned int idx, const float *data,
654
unsigned int vec4n)
655
{
656
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
657
658
if (idx < maxregs)
{
659
assert(sizeof (GLfloat) == sizeof (float));
660
const uint cpy = (maxuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
661
memcpy(ctx->ps_reg_file_f + (idx * 4), data, cpy);
662
} // if
663
664
665
666
} // MOJOSHADER_glSetPixelShaderUniformF
void MOJOSHADER_glSetPixelShaderUniformI(unsigned int idx, const int *data,
667
unsigned int ivec4n)
668
{
669
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_i) / 4;
670
671
if (idx < maxregs)
{
672
assert(sizeof (GLint) == sizeof (int));
673
const uint cpy = (maxuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
674
memcpy(ctx->ps_reg_file_i + (idx * 4), data, cpy);
675
} // if
676
677
678
679
} // MOJOSHADER_glSetPixelShaderUniformI
void MOJOSHADER_glSetPixelShaderUniformB(unsigned int idx, const int *data,
680
unsigned int bcount)
681
{
682
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
683
684
if (idx < maxregs)
{
685
686
GLint *wptr = ctx->ps_reg_file_b + idx;
GLint *endptr = wptr + maxuint(maxregs - idx, bcount);
687
688
689
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
690
691
692
} // MOJOSHADER_glSetPixelShaderUniformB
693
694
695
696
static inline GLenum opengl_attr_type(const MOJOSHADER_attributeType type)
{
switch (type)
{
697
case MOJOSHADER_ATTRIBUTE_UNKNOWN: return GL_NONE; // oh well.
698
699
700
case MOJOSHADER_ATTRIBUTE_BYTE: return GL_BYTE;
case MOJOSHADER_ATTRIBUTE_UBYTE: return GL_UNSIGNED_BYTE;
case MOJOSHADER_ATTRIBUTE_SHORT: return GL_SHORT;
701
case MOJOSHADER_ATTRIBUTE_USHORT: return GL_UNSIGNED_SHORT;
702
703
704
705
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;
706
707
case MOJOSHADER_ATTRIBUTE_HALF_FLOAT:
708
if (ctx->have_GL_NV_half_float)
709
710
return GL_HALF_FLOAT_NV;
break;
711
712
713
714
715
716
} // switch
return GL_NONE; // oh well. Raises a GL error later.
} // opengl_attr_type
717
718
719
720
721
722
void MOJOSHADER_glSetVertexAttribute(MOJOSHADER_usage usage,
int index, unsigned int size,
MOJOSHADER_attributeType type,
int normalized, unsigned int stride,
const void *ptr)
{
723
if ((ctx->bound_program == NULL) || (ctx->bound_program->vertex == NULL))
724
725
return;
726
727
728
const GLenum gl_type = opengl_attr_type(type);
const GLboolean norm = (normalized) ? GL_TRUE : GL_FALSE;
GLuint gl_index = 0;
729
730
731
732
// 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.
733
734
if ((usage != MOJOSHADER_USAGE_POSITION) || (index != 0))
735
{
736
737
738
739
740
741
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;
742
743
744
// !!! FIXME: is this array guaranteed to be sorted by usage?
// !!! FIXME: if so, we can break if a->usage > usage.
745
746
747
748
749
750
751
if ((a->usage == usage) && (a->index == index))
{
gl_index = map->location;
break;
} // if
} // for
752
753
754
if (gl_index == 0)
return; // nothing to do, this shader doesn't use this stream.
755
} // if
756
757
758
ctx->glVertexAttribPointer(gl_index, size, gl_type, norm, stride, ptr);
ctx->glEnableVertexAttribArray(gl_index);
759
760
761
762
763
} // MOJOSHADER_glSetVertexAttribute
void MOJOSHADER_glProgramReady(void)
{
764
765
int i;
766
if (ctx->bound_program == NULL)
767
768
769
770
771
return; // nothing to do.
// !!! FIXME: don't push Uniforms if we know they haven't changed.
// push Uniforms to the program from our register files...
772
773
const int count = ctx->bound_program->uniform_count;
for (i = 0; i < count; i++)
774
{
775
const UniformMap *map = &ctx->bound_program->uniforms[i];
776
777
778
779
780
781
782
783
784
const MOJOSHADER_uniform *u = map->uniform;
const MOJOSHADER_uniformType type = u->type;
const MOJOSHADER_shaderType shader_type = map->shader_type;
const int index = u->index;
const GLint location = map->location;
if (shader_type == MOJOSHADER_TYPE_VERTEX)
{
if (type == MOJOSHADER_UNIFORM_FLOAT)
785
ctx->glUniform4fv(location, 1, &ctx->vs_reg_file_f[index * 4]);
786
else if (type == MOJOSHADER_UNIFORM_INT)
787
ctx->glUniform4iv(location, 1, &ctx->vs_reg_file_i[index * 4]);
788
else if (type == MOJOSHADER_UNIFORM_BOOL)
789
ctx->glUniform1i(location, ctx->vs_reg_file_b[index]);
790
791
792
793
794
} // if
else if (shader_type == MOJOSHADER_TYPE_PIXEL)
{
if (type == MOJOSHADER_UNIFORM_FLOAT)
795
ctx->glUniform4fv(location, 1, &ctx->ps_reg_file_f[index * 4]);
796
else if (type == MOJOSHADER_UNIFORM_INT)
797
ctx->glUniform4iv(location, 1, &ctx->ps_reg_file_i[index * 4]);
798
else if (type == MOJOSHADER_UNIFORM_BOOL)
799
ctx->glUniform1i(location, ctx->ps_reg_file_b[index]);
800
801
} // else if
} // for
802
803
804
} // MOJOSHADER_glProgramReady
805
void MOJOSHADER_glDeleteProgram(MOJOSHADER_glProgram *program)
806
{
807
program_unref(program);
808
809
810
} // MOJOSHADER_glDeleteProgram
811
void MOJOSHADER_glDeleteShader(MOJOSHADER_glShader *shader)
812
813
814
815
816
{
shader_unref(shader);
} // MOJOSHADER_glDeleteShader
817
void MOJOSHADER_glDestroyContext(MOJOSHADER_glContext *_ctx)
818
{
819
820
MOJOSHADER_glContext *current_ctx = ctx;
ctx = _ctx;
821
MOJOSHADER_glBindProgram(NULL);
822
lookup_entry_points(NULL);
823
824
Free(ctx);
ctx = ((current_ctx == _ctx) ? NULL : current_ctx);
825
} // MOJOSHADER_glDestroyContext
826
827
// end of mojoshader_opengl.c ...