/
mojoshader_opengl.c
815 lines (667 loc) · 25 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
17
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <assert.h>
#include "mojoshader.h"
18
#define GL_GLEXT_LEGACY 1
19
20
#include "GL/gl.h"
#include "GL/glext.h"
21
22
23
// Get basic wankery out of the way here...
24
25
#define STATICARRAYLEN(x) ( (sizeof ((x))) / (sizeof ((x)[0])) )
26
27
28
29
30
31
32
33
typedef unsigned int uint; // this is a printf() helper. don't use for code.
typedef uint8_t uint8;
typedef uint32_t uint32;
typedef int32_t int32;
struct MOJOSHADER_glShader
{
const MOJOSHADER_parseData *parseData;
34
GLhandleARB handle;
35
36
37
uint32 refcount;
};
38
39
typedef struct
{
40
MOJOSHADER_shaderType shader_type;
41
const MOJOSHADER_uniform *uniform;
42
GLuint location;
43
44
} UniformMap;
45
46
typedef struct
{
47
const MOJOSHADER_attribute *attribute;
48
GLuint location;
49
50
} AttributeMap;
51
52
struct MOJOSHADER_glProgram
{
53
54
MOJOSHADER_glShader *vertex;
MOJOSHADER_glShader *fragment;
55
GLhandleARB handle;
56
uint32 uniform_count;
57
UniformMap *uniforms;
58
uint32 attribute_count;
59
AttributeMap *attributes;
60
61
62
uint32 refcount;
};
63
// Entry points in base OpenGL that lack function pointer prototypes...
64
65
typedef WINGDIAPI const GLubyte * (APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
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
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...
float vs_reg_file_f[8192 * 4];
int vs_reg_file_i[2047 * 4];
uint8 vs_reg_file_b[2047];
float ps_reg_file_f[8192 * 4];
int ps_reg_file_i[2047 * 4];
uint8 ps_reg_file_b[2047];
// 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;
119
120
121
122
123
124
125
126
127
128
// 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
129
130
131
132
133
134
135
136
137
138
139
140
141
// #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)
{
142
void *retval = ctx->malloc_fn(len, ctx->malloc_data);
143
144
145
if (retval == NULL)
set_error("out of memory");
return retval;
146
147
148
149
} // Malloc
static inline void Free(void *ptr)
{
150
if (ptr != NULL)
151
ctx->free_fn(ptr, ctx->malloc_data);
152
153
154
} // Free
155
156
157
158
159
160
const char *MOJOSHADER_glGetError(void)
{
return error_buffer;
} // MOJOSHADER_glGetError
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
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))
{
183
#define DO_LOOKUP(ext, typ, fn) ctx->fn = (typ) loadsym(lookup, #fn, &ctx->have_##ext)
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
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.
214
215
if (major >= 0)
{
216
if ( ((ctx->opengl_major << 16) | (ctx->opengl_minor & 0xFFFF)) >=
217
218
219
((major << 16) | (minor & 0xFFFF)) )
return 1;
} // if
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
// 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)
237
ctx->opengl_major = ctx->opengl_minor = 0;
238
else
239
sscanf(verstr, "%d.%d", &ctx->opengl_major, &ctx->opengl_minor);
240
241
242
243
244
} // parse_opengl_version
static int check_extensions(void *(*lookup)(const char *fnname))
{
245
246
247
248
249
250
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;
251
252
253
lookup_entry_points(lookup);
254
if (!ctx->have_base_opengl) // a func we should definitely have is MIA?
255
256
257
258
259
{
set_error("missing basic OpenGL entry points");
return 0;
} // if
260
parse_opengl_version((const char *) ctx->glGetString(GL_VERSION));
261
262
const char *extlist = (const char *) ctx->glGetString(GL_EXTENSIONS);
263
264
265
266
if (extlist == NULL)
extlist = ""; // just in case.
#define VERIFY_EXT(ext, major, minor) \
267
ctx->have_##ext = verify_extension(#ext, ctx->have_##ext, extlist, major, minor)
268
269
270
271
272
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);
273
VERIFY_EXT(GL_NV_half_float, -1, -1);
274
275
276
277
#undef VERIFY_EXT
#define REQUIRE_GL_EXTENSION(x) \
278
if (!ctx->have_##x) { set_error("profile requires " #x); return 0; }
279
280
if (strcmp(ctx->profile, MOJOSHADER_PROFILE_GLSL) == 0)
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
{
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
300
MOJOSHADER_glContext *MOJOSHADER_glCreateContext(const char *_profile,
301
302
303
void *(*lookup)(const char *fnname),
MOJOSHADER_malloc m, MOJOSHADER_free f,
void *d)
304
{
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
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
MOJOSHADER_glContext *retval = ctx;
memset(ctx, '\0', sizeof (MOJOSHADER_glContext));
ctx->malloc_fn = m;
ctx->free_fn = f;
ctx->malloc_data = d;
324
325
if (strcmp(_profile, MOJOSHADER_PROFILE_GLSL) == 0)
326
ctx->profile = MOJOSHADER_PROFILE_GLSL;
327
else
328
329
{
set_error("unknown profile");
330
goto init_fail;
331
} // else
332
333
334
if (!check_extensions(lookup))
goto init_fail;
335
336
337
MOJOSHADER_glBindProgram(NULL);
338
339
ctx = current_ctx;
return retval;
340
341
init_fail:
342
343
344
345
if (ctx != NULL)
f(ctx, d);
ctx = current_ctx;
return NULL;
346
} // MOJOSHADER_glCreateContext
347
348
349
350
351
352
353
354
void MOJOSHADER_glMakeContextCurrent(MOJOSHADER_glContext *_ctx)
{
ctx = _ctx;
} // MOJOSHADER_glMakeContextCurrent
355
356
357
358
MOJOSHADER_glShader *MOJOSHADER_glCompileShader(const unsigned char *tokenbuf,
const unsigned int bufsize)
{
MOJOSHADER_glShader *retval = NULL;
359
GLhandleARB shader = 0;
360
361
362
363
const MOJOSHADER_parseData *pd = MOJOSHADER_parse(ctx->profile, tokenbuf,
bufsize, ctx->malloc_fn,
ctx->free_fn,
ctx->malloc_data);
364
if (pd->error != NULL)
365
366
{
set_error(pd->error);
367
goto compile_shader_fail;
368
} // if
369
370
371
retval = (MOJOSHADER_glShader *) Malloc(sizeof (MOJOSHADER_glShader));
if (retval == NULL)
372
373
goto compile_shader_fail;
374
GLint ok = 0;
375
const GLenum shader_type = (pd->shader_type == MOJOSHADER_TYPE_PIXEL) ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER;
376
GLint shaderlen = (GLint) pd->output_len;
377
shader = ctx->glCreateShaderObject(shader_type);
378
379
380
381
ctx->glShaderSource(shader, 1, (const GLchar **) &pd->output, &shaderlen);
ctx->glCompileShader(shader);
ctx->glGetObjectParameteriv(shader, GL_OBJECT_COMPILE_STATUS_ARB, &ok);
382
383
384
385
if (!ok)
{
GLsizei len = 0;
386
ctx->glGetInfoLog(shader, sizeof (error_buffer), &len, (GLchar *) error_buffer);
387
goto compile_shader_fail;
388
389
390
391
392
393
} // if
retval->parseData = pd;
retval->handle = shader;
retval->refcount = 1;
return retval;
394
395
396
397
398
compile_shader_fail:
MOJOSHADER_freeParseData(pd);
Free(retval);
if (shader != 0)
399
ctx->glDeleteObject(shader);
400
return NULL;
401
402
403
} // MOJOSHADER_glCompileShader
404
405
406
407
408
409
410
const MOJOSHADER_parseData *MOJOSHADER_glGetShaderParseData(
MOJOSHADER_glShader *shader)
{
return (shader != NULL) ? shader->parseData : NULL;
} // MOJOSHADER_glGetShaderParseData
411
412
413
414
static void shader_unref(MOJOSHADER_glShader *shader)
{
if (shader != NULL)
{
415
const uint32 refcount = shader->refcount;
416
if (refcount > 1)
417
shader->refcount--;
418
419
else
{
420
ctx->glDeleteObject(shader->handle);
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
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
{
437
ctx->glDeleteObject(program->handle);
438
439
shader_unref(program->vertex);
shader_unref(program->fragment);
440
Free(program->attributes);
441
Free(program->uniforms);
442
443
444
445
446
447
Free(program);
} // else
} // if
} // program_unref
448
449
450
451
452
static void lookup_uniforms(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader)
{
int i;
const MOJOSHADER_parseData *pd = shader->parseData;
453
const MOJOSHADER_uniform *u = pd->uniforms;
454
const MOJOSHADER_shaderType shader_type = pd->shader_type;
455
456
457
for (i = 0; i < pd->uniform_count; i++)
{
458
const GLint loc = ctx->glGetUniformLocation(program->handle, u[i].name);
459
460
461
if (loc != -1) // maybe the Uniform was optimized out?
{
UniformMap *map = &program->uniforms[program->uniform_count];
462
map->shader_type = shader_type;
463
map->uniform = &u[i];
464
map->location = (GLuint) loc;
465
466
467
468
469
470
program->uniform_count++;
} // if
} // for
} // lookup_uniforms
471
472
473
474
static void lookup_attributes(MOJOSHADER_glProgram *program)
{
int i;
const MOJOSHADER_parseData *pd = program->vertex->parseData;
475
const MOJOSHADER_attribute *a = pd->attributes;
476
477
478
for (i = 0; i < pd->attribute_count; i++)
{
479
const GLint loc = ctx->glGetAttribLocation(program->handle, a->name);
480
481
482
483
if (loc != -1) // maybe the Attribute was optimized out?
{
AttributeMap *map = &program->attributes[program->attribute_count];
map->attribute = &a[i];
484
map->location = (GLuint) loc;
485
486
487
488
489
490
program->attribute_count++;
} // if
} // for
} // lookup_attributes
491
492
493
MOJOSHADER_glProgram *MOJOSHADER_glLinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
494
495
496
if ((vshader == NULL) && (pshader == NULL))
return NULL;
497
MOJOSHADER_glProgram *retval = NULL;
498
const GLhandleARB program = ctx->glCreateProgramObject();
499
500
501
if (vshader != NULL) ctx->glAttachObject(program, vshader->handle);
if (pshader != NULL) ctx->glAttachObject(program, pshader->handle);
502
503
ctx->glLinkProgram(program);
504
505
GLint ok = 0;
506
ctx->glGetObjectParameteriv(program, GL_OBJECT_LINK_STATUS_ARB, &ok);
507
508
509
if (!ok)
{
GLsizei len = 0;
510
ctx->glGetInfoLog(program, sizeof (error_buffer), &len, (GLchar *) error_buffer);
511
512
goto link_program_fail;
} // if
513
514
515
retval = (MOJOSHADER_glProgram *) Malloc(sizeof (MOJOSHADER_glProgram));
if (retval == NULL)
516
517
goto link_program_fail;
memset(retval, '\0', sizeof (MOJOSHADER_glProgram));
518
519
520
521
int numregs = 0;
if (vshader != NULL) numregs += vshader->parseData->uniform_count;
if (pshader != NULL) numregs += pshader->parseData->uniform_count;
522
523
524
retval->uniforms = (UniformMap *) Malloc(sizeof (UniformMap) * numregs);
if (retval->uniforms == NULL)
goto link_program_fail;
525
memset(retval->uniforms, '\0', sizeof (UniformMap) * numregs);
526
527
528
529
530
retval->handle = program;
retval->vertex = vshader;
retval->fragment = pshader;
retval->refcount = 1;
531
532
if (vshader != NULL)
533
{
534
535
536
537
538
539
retval->attributes = (AttributeMap *) Malloc(sizeof (AttributeMap) *
vshader->parseData->attribute_count);
if (retval->attributes == NULL)
goto link_program_fail;
lookup_attributes(retval);
540
lookup_uniforms(retval, vshader);
541
vshader->refcount++;
542
543
} // if
544
if (pshader != NULL)
545
546
{
lookup_uniforms(retval, pshader);
547
pshader->refcount++;
548
} // if
549
550
return retval;
551
552
553
554
link_program_fail:
if (retval != NULL)
{
555
556
Free(retval->uniforms);
Free(retval->attributes);
557
558
559
Free(retval);
} // if
560
ctx->glDeleteObject(program);
561
return NULL;
562
563
564
565
566
} // MOJOSHADER_glLinkProgram
void MOJOSHADER_glBindProgram(MOJOSHADER_glProgram *program)
{
567
GLhandleARB handle = 0;
568
int i;
569
570
if (program == ctx->bound_program)
571
572
573
return; // nothing to do.
// Disable any client-side arrays the current program could have used.
574
575
// !!! FIXME: don't disable yet...see which ones get reused, and disable
// !!! FIXME: only what we don't need in MOJOSHADER_glProgramReady().
576
if (ctx->bound_program != NULL)
577
{
578
579
const int count = ctx->bound_program->attribute_count;
for (i = 0; i < count; i++)
580
{
581
582
const AttributeMap *map = &ctx->bound_program->attributes[i];
ctx->glDisableVertexAttribArray(map->location);
583
584
585
} // if
} // for
586
587
588
589
590
591
if (program != NULL)
{
handle = program->handle;
program->refcount++;
} // if
592
593
594
ctx->glUseProgramObject(handle);
program_unref(ctx->bound_program);
ctx->bound_program = program;
595
596
597
} // MOJOSHADER_glBindProgram
598
599
600
601
602
603
static inline uint maxuint(const uint a, const uint b)
{
return ((a > b) ? a : b);
} // maxuint
604
void MOJOSHADER_glSetVertexShaderUniformF(unsigned int idx, const float *data,
605
unsigned int vec4n)
606
{
607
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
608
609
if (idx < maxregs)
{
610
const uint cpy = (maxuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
611
memcpy(ctx->vs_reg_file_f + (idx * 4), data, cpy);
612
} // if
613
614
615
616
} // MOJOSHADER_glSetVertexShaderUniformF
void MOJOSHADER_glSetVertexShaderUniformI(unsigned int idx, const int *data,
617
unsigned int ivec4n)
618
{
619
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_i) / 4;
620
621
if (idx < maxregs)
{
622
const uint cpy = (maxuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
623
memcpy(ctx->vs_reg_file_i + (idx * 4), data, cpy);
624
} // if
625
626
627
628
629
630
} // MOJOSHADER_glSetVertexShaderUniformI
void MOJOSHADER_glSetVertexShaderUniformB(unsigned int idx, const int *data,
unsigned int bcount)
{
631
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
632
633
if (idx < maxregs)
{
634
uint8 *wptr = ctx->vs_reg_file_b + idx;
635
636
637
638
uint8 *endptr = wptr + maxuint(maxregs - idx, bcount);
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
639
640
641
642
} // MOJOSHADER_glSetVertexShaderUniformB
void MOJOSHADER_glSetPixelShaderUniformF(unsigned int idx, const float *data,
643
unsigned int vec4n)
644
{
645
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
646
647
if (idx < maxregs)
{
648
const uint cpy = (maxuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
649
memcpy(ctx->ps_reg_file_f + (idx * 4), data, cpy);
650
} // if
651
652
653
654
} // MOJOSHADER_glSetPixelShaderUniformF
void MOJOSHADER_glSetPixelShaderUniformI(unsigned int idx, const int *data,
655
unsigned int ivec4n)
656
{
657
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_i) / 4;
658
659
if (idx < maxregs)
{
660
const uint cpy = (maxuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
661
memcpy(ctx->ps_reg_file_i + (idx * 4), data, cpy);
662
} // if
663
664
665
666
} // MOJOSHADER_glSetPixelShaderUniformI
void MOJOSHADER_glSetPixelShaderUniformB(unsigned int idx, const int *data,
667
unsigned int bcount)
668
{
669
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
670
671
if (idx < maxregs)
{
672
uint8 *wptr = ctx->ps_reg_file_b + idx;
673
674
675
676
uint8 *endptr = wptr + maxuint(maxregs - idx, bcount);
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
677
678
679
} // MOJOSHADER_glSetPixelShaderUniformB
680
681
682
683
static inline GLenum opengl_attr_type(const MOJOSHADER_attributeType type)
{
switch (type)
{
684
case MOJOSHADER_ATTRIBUTE_UNKNOWN: return GL_NONE; // oh well.
685
686
687
case MOJOSHADER_ATTRIBUTE_BYTE: return GL_BYTE;
case MOJOSHADER_ATTRIBUTE_UBYTE: return GL_UNSIGNED_BYTE;
case MOJOSHADER_ATTRIBUTE_SHORT: return GL_SHORT;
688
case MOJOSHADER_ATTRIBUTE_USHORT: return GL_UNSIGNED_SHORT;
689
690
691
692
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;
693
694
case MOJOSHADER_ATTRIBUTE_HALF_FLOAT:
695
if (ctx->have_GL_NV_half_float)
696
697
return GL_HALF_FLOAT_NV;
break;
698
699
700
701
702
703
} // switch
return GL_NONE; // oh well. Raises a GL error later.
} // opengl_attr_type
704
705
706
707
708
709
void MOJOSHADER_glSetVertexAttribute(MOJOSHADER_usage usage,
int index, unsigned int size,
MOJOSHADER_attributeType type,
int normalized, unsigned int stride,
const void *ptr)
{
710
if ((ctx->bound_program == NULL) || (ctx->bound_program->vertex == NULL))
711
712
return;
713
714
715
const GLenum gl_type = opengl_attr_type(type);
const GLboolean norm = (normalized) ? GL_TRUE : GL_FALSE;
GLuint gl_index = 0;
716
717
718
719
// 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.
720
721
if ((usage != MOJOSHADER_USAGE_POSITION) || (index != 0))
722
{
723
724
725
726
727
728
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;
729
730
731
// !!! FIXME: is this array guaranteed to be sorted by usage?
// !!! FIXME: if so, we can break if a->usage > usage.
732
733
734
735
736
737
738
if ((a->usage == usage) && (a->index == index))
{
gl_index = map->location;
break;
} // if
} // for
739
740
741
if (gl_index == 0)
return; // nothing to do, this shader doesn't use this stream.
742
} // if
743
744
745
ctx->glVertexAttribPointer(gl_index, size, gl_type, norm, stride, ptr);
ctx->glEnableVertexAttribArray(gl_index);
746
747
748
749
750
} // MOJOSHADER_glSetVertexAttribute
void MOJOSHADER_glProgramReady(void)
{
751
752
int i;
753
if (ctx->bound_program == NULL)
754
755
756
757
758
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...
759
760
const int count = ctx->bound_program->uniform_count;
for (i = 0; i < count; i++)
761
{
762
const UniformMap *map = &ctx->bound_program->uniforms[i];
763
764
765
766
767
768
769
770
771
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)
772
ctx->glUniform4fv(location, 1, &ctx->vs_reg_file_f[index * 4]);
773
else if (type == MOJOSHADER_UNIFORM_INT)
774
ctx->glUniform4iv(location, 1, &ctx->vs_reg_file_i[index * 4]);
775
else if (type == MOJOSHADER_UNIFORM_BOOL)
776
ctx->glUniform1i(location, ctx->vs_reg_file_b[index]);
777
778
779
780
781
} // if
else if (shader_type == MOJOSHADER_TYPE_PIXEL)
{
if (type == MOJOSHADER_UNIFORM_FLOAT)
782
ctx->glUniform4fv(location, 1, &ctx->ps_reg_file_f[index * 4]);
783
else if (type == MOJOSHADER_UNIFORM_INT)
784
ctx->glUniform4iv(location, 1, &ctx->ps_reg_file_i[index * 4]);
785
else if (type == MOJOSHADER_UNIFORM_BOOL)
786
ctx->glUniform1i(location, ctx->ps_reg_file_b[index]);
787
788
} // else if
} // for
789
790
791
} // MOJOSHADER_glProgramReady
792
void MOJOSHADER_glDeleteProgram(MOJOSHADER_glProgram *program)
793
{
794
program_unref(program);
795
796
797
} // MOJOSHADER_glDeleteProgram
798
void MOJOSHADER_glDeleteShader(MOJOSHADER_glShader *shader)
799
800
801
802
803
{
shader_unref(shader);
} // MOJOSHADER_glDeleteShader
804
void MOJOSHADER_glDestroyContext(MOJOSHADER_glContext *_ctx)
805
{
806
807
MOJOSHADER_glContext *current_ctx = ctx;
ctx = _ctx;
808
MOJOSHADER_glBindProgram(NULL);
809
lookup_entry_points(NULL);
810
811
Free(ctx);
ctx = ((current_ctx == _ctx) ? NULL : current_ctx);
812
} // MOJOSHADER_glDestroyContext
813
814
// end of mojoshader_opengl.c ...