/
mojoshader_opengl.c
2179 lines (1821 loc) · 71.3 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
// !!! FIXME: preshaders shouldn't be handled in here at all. This should
// !!! FIXME: be in the Effects API, once that's actually written.
13
14
15
16
17
18
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
19
// !!! FIXME: most of these _MSC_VER should probably be _WINDOWS?
20
21
22
23
24
#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h> // GL headers need this for WINGDIAPI definition.
#endif
25
26
27
28
29
30
31
32
#if (defined(__APPLE__) && defined(__MACH__))
#define PLATFORM_MACOSX 1
#endif
#if PLATFORM_MACOSX
#include <Carbon/Carbon.h>
#endif
33
34
35
#define __MOJOSHADER_INTERNAL__ 1
#include "mojoshader_internal.h"
36
#define GL_GLEXT_LEGACY 1
37
38
#include "GL/gl.h"
#include "GL/glext.h"
39
40
41
42
43
44
45
46
47
#ifndef GL_HALF_FLOAT
#define GL_HALF_FLOAT 0x140B
#endif
#ifndef GL_HALF_FLOAT_OES
#define GL_HALF_FLOAT_OES 0x8D61
#endif
48
49
50
51
// this happens to be the same value for ARB1 and GLSL.
#ifndef GL_PROGRAM_POINT_SIZE
#define GL_PROGRAM_POINT_SIZE 0x8642
#endif
52
53
54
55
struct MOJOSHADER_glShader
{
const MOJOSHADER_parseData *parseData;
56
GLuint handle;
57
58
59
uint32 refcount;
};
60
61
typedef struct
{
62
MOJOSHADER_shaderType shader_type;
63
const MOJOSHADER_uniform *uniform;
64
GLint location;
65
66
} UniformMap;
67
68
typedef struct
{
69
const MOJOSHADER_attribute *attribute;
70
GLint location;
71
72
} AttributeMap;
73
74
struct MOJOSHADER_glProgram
{
75
76
MOJOSHADER_glShader *vertex;
MOJOSHADER_glShader *fragment;
77
GLuint handle;
78
uint32 generation;
79
uint32 uniform_count;
80
UniformMap *uniforms;
81
uint32 attribute_count;
82
AttributeMap *attributes;
83
84
85
86
87
88
89
90
91
92
93
94
size_t vs_uniforms_float4_count;
GLfloat *vs_uniforms_float4;
size_t vs_uniforms_int4_count;
GLint *vs_uniforms_int4;
size_t vs_uniforms_bool_count;
GLint *vs_uniforms_bool;
size_t ps_uniforms_float4_count;
GLfloat *ps_uniforms_float4;
size_t ps_uniforms_int4_count;
GLint *ps_uniforms_int4;
size_t ps_uniforms_bool_count;
GLint *ps_uniforms_bool;
95
96
97
98
99
100
size_t vs_preshader_reg_count;
GLfloat *vs_preshader_regs;
size_t ps_preshader_reg_count;
GLfloat *ps_preshader_regs;
101
uint32 refcount;
102
103
104
int uses_pointsize;
105
// GLSL uses these...location of uniform arrays.
106
107
108
109
110
111
GLint vs_float4_loc;
GLint vs_int4_loc;
GLint vs_bool_loc;
GLint ps_float4_loc;
GLint ps_int4_loc;
GLint ps_bool_loc;
112
113
};
114
115
116
117
#ifndef WINGDIAPI
#define WINGDIAPI
#endif
118
// Entry points in base OpenGL that lack function pointer prototypes...
119
120
typedef WINGDIAPI void (APIENTRYP PFNGLGETINTEGERVPROC) (GLenum pname, GLint *params);
typedef WINGDIAPI const GLubyte * (APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
121
typedef WINGDIAPI GLenum (APIENTRYP PFNGLGETERRORPROC) (void);
122
123
typedef WINGDIAPI void (APIENTRYP PFNGLENABLEPROC) (GLenum cap);
typedef WINGDIAPI void (APIENTRYP PFNGLDISABLEPROC) (GLenum cap);
124
125
126
127
128
129
// Max entries for each register file type...
#define MAX_REG_FILE_F 8192
#define MAX_REG_FILE_I 2047
#define MAX_REG_FILE_B 2047
130
131
132
133
134
135
136
137
struct MOJOSHADER_glContext
{
// Allocators...
MOJOSHADER_malloc malloc_fn;
MOJOSHADER_free free_fn;
void *malloc_data;
// The constant register files...
138
139
// !!! FIXME: Man, it kills me how much memory this takes...
// !!! FIXME: ... make this dynamically allocated on demand.
140
141
142
143
144
145
GLfloat vs_reg_file_f[MAX_REG_FILE_F * 4];
GLint vs_reg_file_i[MAX_REG_FILE_I * 4];
uint8 vs_reg_file_b[MAX_REG_FILE_B];
GLfloat ps_reg_file_f[MAX_REG_FILE_F * 4];
GLint ps_reg_file_i[MAX_REG_FILE_I * 4];
uint8 ps_reg_file_b[MAX_REG_FILE_B];
146
GLuint sampler_reg_file[16];
147
148
149
150
// This increments every time we change the register files.
uint32 generation;
151
// This tells us which vertex attribute arrays we have enabled.
152
GLint max_attrs;
153
154
155
uint8 want_attr[32];
uint8 have_attr[32];
156
157
158
// rarely used, so we don't touch when we don't have to.
int pointsize_enabled;
159
160
161
162
// GL stuff...
int opengl_major;
int opengl_minor;
MOJOSHADER_glProgram *bound_program;
163
char profile[16];
164
165
// Extensions...
166
167
168
169
170
171
172
173
174
175
176
177
178
179
int have_base_opengl;
int have_GL_ARB_vertex_program;
int have_GL_ARB_fragment_program;
int have_GL_NV_vertex_program2_option;
int have_GL_NV_fragment_program2;
int have_GL_NV_vertex_program3;
int have_GL_NV_gpu_program4;
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;
int have_GL_ARB_half_float_vertex;
int have_GL_OES_vertex_half_float;
180
181
182
// Entry points...
PFNGLGETSTRINGPROC glGetString;
183
PFNGLGETERRORPROC glGetError;
184
PFNGLGETINTEGERVPROC glGetIntegerv;
185
186
PFNGLENABLEPROC glEnable;
PFNGLDISABLEPROC glDisable;
187
188
189
190
191
192
193
194
195
196
197
198
199
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;
200
201
PFNGLUNIFORM1IARBPROC glUniform1i;
PFNGLUNIFORM1IVARBPROC glUniform1iv;
202
203
204
205
PFNGLUNIFORM4FVARBPROC glUniform4fv;
PFNGLUNIFORM4IVARBPROC glUniform4iv;
PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObject;
PFNGLVERTEXATTRIBPOINTERARBPROC glVertexAttribPointer;
206
207
PFNGLGETPROGRAMIVARBPROC glGetProgramivARB;
PFNGLGETPROGRAMSTRINGARBPROC glGetProgramStringARB;
208
PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB;
209
PFNGLPROGRAMLOCALPARAMETERI4IVNVPROC glProgramLocalParameterI4ivNV;
210
211
212
213
PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB;
PFNGLGENPROGRAMSARBPROC glGenProgramsARB;
PFNGLBINDPROGRAMARBPROC glBindProgramARB;
PFNGLPROGRAMSTRINGARBPROC glProgramStringARB;
214
215
216
// interface for profile-specific things.
int (*profileMaxUniforms)(MOJOSHADER_shaderType shader_type);
217
int (*profileCompileShader)(const MOJOSHADER_parseData *pd, GLuint *s);
218
219
void (*profileDeleteShader)(const GLuint shader);
void (*profileDeleteProgram)(const GLuint program);
220
GLint (*profileGetAttribLocation)(MOJOSHADER_glProgram *program, int idx);
221
GLint (*profileGetUniformLocation)(MOJOSHADER_glProgram *program, MOJOSHADER_glShader *shader, int idx);
222
GLint (*profileGetSamplerLocation)(MOJOSHADER_glProgram *, MOJOSHADER_glShader *, int);
223
GLuint (*profileLinkProgram)(MOJOSHADER_glShader *, MOJOSHADER_glShader *);
224
void (*profileFinalInitProgram)(MOJOSHADER_glProgram *program);
225
void (*profileUseProgramObject)(MOJOSHADER_glProgram *program);
226
227
228
void (*profilePushConstantArray)(MOJOSHADER_glProgram *, const MOJOSHADER_uniform *, const GLfloat *);
void (*profilePushUniforms)(void);
void (*profilePushSampler)(GLint loc, GLuint sampler);
229
230
int (*profileMustPushConstantArrays)(void);
int (*profileMustPushSamplers)(void);
231
232
};
233
234
static MOJOSHADER_glContext *ctx = NULL;
235
236
237
238
239
240
241
242
243
// 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
244
245
246
247
248
249
250
251
#if PLATFORM_MACOSX
static inline int macosx_version_atleast(int x, int y, int z)
{
static int checked = 0;
static int combined = 0;
if (!checked)
{
252
SInt32 ver, major, minor, patch;
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
int convert = 0;
if (Gestalt(gestaltSystemVersion, &ver) != noErr)
ver = 0x1000; // oh well.
else if (ver < 0x1030)
convert = 1; // split (ver) into (major),(minor),(patch).
else
{
// presumably this won't fail. But if it does, we'll just use the
// original version value. This might cut the value--10.12.11 will
// come out to 10.9.9, for example--but it's better than nothing.
if (Gestalt(gestaltSystemVersionMajor, &major) != noErr)
convert = 1;
else if (Gestalt(gestaltSystemVersionMinor, &minor) != noErr)
convert = 1;
else if (Gestalt(gestaltSystemVersionBugFix, &patch) != noErr)
convert = 1;
} // else
if (convert)
{
major = ((ver & 0xFF00) >> 8);
major = (((major / 16) * 10) + (major % 16));
minor = ((ver & 0xF0) >> 4);
patch = (ver & 0xF);
278
} // if
279
280
281
282
283
combined = (major << 16) | (minor << 8) | patch;
checked = 1;
} // if
284
return (combined >= ((x << 16) | (y << 8) | z));
285
286
287
} // macosx_version_atleast
#endif
288
289
290
static inline void *Malloc(const size_t len)
{
291
void *retval = ctx->malloc_fn((int) len, ctx->malloc_data);
292
293
294
if (retval == NULL)
set_error("out of memory");
return retval;
295
296
297
298
} // Malloc
static inline void Free(void *ptr)
{
299
if (ptr != NULL)
300
ctx->free_fn(ptr, ctx->malloc_data);
301
302
303
} // Free
304
305
306
307
308
309
310
311
312
static inline void toggle_gl_state(GLenum state, int val)
{
if (val)
ctx->glEnable(state);
else
ctx->glDisable(state);
} // toggle_gl_state
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
// profile-specific implementations...
#if SUPPORT_PROFILE_GLSL
static inline GLenum glsl_shader_type(const MOJOSHADER_shaderType t)
{
if (t == MOJOSHADER_TYPE_VERTEX)
return GL_VERTEX_SHADER;
else if (t == MOJOSHADER_TYPE_PIXEL)
return GL_FRAGMENT_SHADER;
// !!! FIXME: geometry shaders?
return GL_NONE;
} // glsl_shader_type
328
329
static int impl_GLSL_MustPushConstantArrays(void) { return 1; }
static int impl_GLSL_MustPushSamplers(void) { return 1; }
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
static int impl_GLSL_MaxUniforms(MOJOSHADER_shaderType shader_type)
{
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;
} // impl_GLSL_MaxUniforms
static int impl_GLSL_CompileShader(const MOJOSHADER_parseData *pd, GLuint *s)
{
GLint ok = 0;
GLint shaderlen = (GLint) pd->output_len;
const GLenum shader_type = glsl_shader_type(pd->shader_type);
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
static GLint impl_GLSL_GetUniformLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
387
return 0; // no-op, we push this as one big-ass array now.
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
} // impl_GLSL_GetUniformLocation
static GLint impl_GLSL_GetSamplerLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
return ctx->glGetUniformLocation(program->handle,
shader->parseData->samplers[idx].name);
} // impl_GLSL_GetSamplerLocation
static GLint impl_GLSL_GetAttribLocation(MOJOSHADER_glProgram *program, int idx)
{
const MOJOSHADER_parseData *pd = program->vertex->parseData;
const MOJOSHADER_attribute *a = pd->attributes;
return ctx->glGetAttribLocation(program->handle, a[idx].name);
} // impl_GLSL_GetAttribLocation
static GLuint impl_GLSL_LinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
const GLuint program = ctx->glCreateProgramObject();
if (vshader != NULL) ctx->glAttachObject(program, vshader->handle);
if (pshader != NULL) ctx->glAttachObject(program, pshader->handle);
ctx->glLinkProgram(program);
GLint ok = 0;
ctx->glGetObjectParameteriv(program, GL_OBJECT_LINK_STATUS_ARB, &ok);
if (!ok)
{
GLsizei len = 0;
ctx->glGetInfoLog(program, sizeof (error_buffer), &len, (GLchar *) error_buffer);
ctx->glDeleteObject(program);
return 0;
} // if
return program;
} // impl_GLSL_LinkProgram
431
static void impl_GLSL_FinalInitProgram(MOJOSHADER_glProgram *program)
432
433
434
435
436
437
438
439
440
441
442
443
444
{
program->vs_float4_loc =
ctx->glGetUniformLocation(program->handle, "vs_uniforms_vec4");
program->vs_int4_loc =
ctx->glGetUniformLocation(program->handle, "vs_uniforms_ivec4");
program->vs_bool_loc =
ctx->glGetUniformLocation(program->handle, "vs_uniforms_bool");
program->ps_float4_loc =
ctx->glGetUniformLocation(program->handle, "ps_uniforms_vec4");
program->ps_int4_loc =
ctx->glGetUniformLocation(program->handle, "ps_uniforms_ivec4");
program->ps_bool_loc =
ctx->glGetUniformLocation(program->handle, "ps_uniforms_bool");
445
} // impl_GLSL_FinalInitProgram
446
447
448
449
450
451
452
453
static void impl_GLSL_UseProgramObject(MOJOSHADER_glProgram *program)
{
ctx->glUseProgramObject((program != NULL) ? program->handle : 0);
} // impl_GLSL_UseProgramObject
454
455
456
static void impl_GLSL_PushConstantArray(MOJOSHADER_glProgram *program,
const MOJOSHADER_uniform *u,
const GLfloat *f)
457
{
458
const GLint loc = ctx->glGetUniformLocation(program->handle, u->name);
459
if (loc >= 0) // not optimized out?
460
461
ctx->glUniform4fv(loc, u->array_count, f);
} // impl_GLSL_PushConstantArray
462
463
464
static void impl_GLSL_PushUniforms(void)
465
{
466
const MOJOSHADER_glProgram *program = ctx->bound_program;
467
468
469
assert(program->uniform_count > 0); // don't call with nothing to do!
470
471
472
473
474
475
if (program->vs_float4_loc != -1)
{
ctx->glUniform4fv(program->vs_float4_loc,
program->vs_uniforms_float4_count,
program->vs_uniforms_float4);
} // if
476
477
478
479
480
481
482
if (program->vs_int4_loc != -1)
{
ctx->glUniform4iv(program->vs_int4_loc,
program->vs_uniforms_int4_count,
program->vs_uniforms_int4);
} // if
483
484
485
486
487
488
489
if (program->vs_bool_loc != -1)
{
ctx->glUniform1iv(program->vs_bool_loc,
program->vs_uniforms_bool_count,
program->vs_uniforms_bool);
} // if
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
if (program->ps_float4_loc != -1)
{
ctx->glUniform4fv(program->ps_float4_loc,
program->ps_uniforms_float4_count,
program->ps_uniforms_float4);
} // if
if (program->ps_int4_loc != -1)
{
ctx->glUniform4iv(program->ps_int4_loc,
program->ps_uniforms_int4_count,
program->ps_uniforms_int4);
} // if
if (program->ps_bool_loc != -1)
{
ctx->glUniform1iv(program->ps_bool_loc,
program->ps_uniforms_bool_count,
program->ps_uniforms_bool);
} // if
} // impl_GLSL_PushUniforms
static void impl_GLSL_PushSampler(GLint loc, GLuint sampler)
515
516
{
ctx->glUniform1i(loc, sampler);
517
} // impl_GLSL_PushSampler
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
#endif // SUPPORT_PROFILE_GLSL
#if SUPPORT_PROFILE_ARB1
static inline GLenum arb1_shader_type(const MOJOSHADER_shaderType t)
{
if (t == MOJOSHADER_TYPE_VERTEX)
return GL_VERTEX_PROGRAM_ARB;
else if (t == MOJOSHADER_TYPE_PIXEL)
return GL_FRAGMENT_PROGRAM_ARB;
// !!! FIXME: geometry shaders?
return GL_NONE;
} // arb1_shader_type
534
535
static int impl_ARB1_MustPushConstantArrays(void) { return 0; }
static int impl_ARB1_MustPushSamplers(void) { return 0; }
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
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
static int impl_ARB1_MaxUniforms(MOJOSHADER_shaderType shader_type)
{
GLint retval = 0;
const GLenum program_type = arb1_shader_type(shader_type);
if (program_type == GL_NONE)
return -1;
ctx->glGetProgramivARB(program_type, GL_MAX_PROGRAM_PARAMETERS_ARB, &retval);
return (int) retval; // !!! FIXME: times four?
} // impl_ARB1_MaxUniforms
static int impl_ARB1_CompileShader(const MOJOSHADER_parseData *pd, GLuint *s)
{
GLint shaderlen = (GLint) pd->output_len;
const GLenum shader_type = arb1_shader_type(pd->shader_type);
GLuint shader = 0;
ctx->glGenProgramsARB(1, &shader);
ctx->glGetError(); // flush any existing error state.
ctx->glBindProgramARB(shader_type, shader);
ctx->glProgramStringARB(shader_type, GL_PROGRAM_FORMAT_ASCII_ARB,
shaderlen, pd->output);
if (ctx->glGetError() == GL_INVALID_OPERATION)
{
GLint pos = 0;
ctx->glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &pos);
const GLubyte *errstr = ctx->glGetString(GL_PROGRAM_ERROR_STRING_ARB);
snprintf(error_buffer, sizeof (error_buffer),
"ARB1 compile error at position %d: %s",
(int) pos, (const char *) errstr);
ctx->glBindProgramARB(shader_type, 0);
ctx->glDeleteProgramsARB(1, &shader);
*s = 0;
return 0;
} // if
*s = shader;
return 1;
} // impl_ARB1_CompileShader
static void impl_ARB1_DeleteShader(const GLuint _shader)
{
GLuint shader = _shader; // const removal.
ctx->glDeleteProgramsARB(1, &shader);
} // impl_ARB1_DeleteShader
static void impl_ARB1_DeleteProgram(const GLuint program)
{
// no-op. ARB1 doesn't have real linked programs.
} // impl_GLSL_DeleteProgram
static GLint impl_ARB1_GetUniformLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
595
return 0; // no-op, we push this as one big-ass array now.
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
} // impl_ARB1_GetUniformLocation
static GLint impl_ARB1_GetSamplerLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
return shader->parseData->samplers[idx].index;
} // impl_ARB1_GetSamplerLocation
static GLint impl_ARB1_GetAttribLocation(MOJOSHADER_glProgram *program, int idx)
{
return idx; // map to vertex arrays in the same order as the parseData.
} // impl_ARB1_GetAttribLocation
static GLuint impl_ARB1_LinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
// there is no formal linking in ARB1...just return a unique value.
static GLuint retval = 1;
return retval++;
} // impl_ARB1_LinkProgram
620
static void impl_ARB1_FinalInitProgram(MOJOSHADER_glProgram *program)
621
622
{
// no-op.
623
} // impl_ARB1_FinalInitProgram
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
static void impl_ARB1_UseProgramObject(MOJOSHADER_glProgram *program)
{
GLuint vhandle = 0;
GLuint phandle = 0;
if (program != NULL)
{
if (program->vertex != NULL)
vhandle = program->vertex->handle;
if (program->fragment != NULL)
phandle = program->fragment->handle;
} // if
toggle_gl_state(GL_VERTEX_PROGRAM_ARB, vhandle != 0);
toggle_gl_state(GL_FRAGMENT_PROGRAM_ARB, phandle != 0);
ctx->glBindProgramARB(GL_VERTEX_PROGRAM_ARB, vhandle);
ctx->glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, phandle);
} // impl_ARB1_UseProgramObject
646
647
648
static void impl_ARB1_PushConstantArray(MOJOSHADER_glProgram *program,
const MOJOSHADER_uniform *u,
const GLfloat *f)
649
{
650
651
// no-op. Constant arrays are defined in source code for arb1.
} // impl_ARB1_PushConstantArray
652
653
654
static void impl_ARB1_PushUniforms(void)
655
{
656
657
658
// vertex shader uniforms come first in program->uniforms array.
MOJOSHADER_shaderType shader_type = MOJOSHADER_TYPE_VERTEX;
GLenum arb_shader_type = arb1_shader_type(shader_type);
659
const MOJOSHADER_glProgram *program = ctx->bound_program;
660
661
662
663
664
const uint32 count = program->uniform_count;
const GLfloat *srcf = program->vs_uniforms_float4;
const GLint *srci = program->vs_uniforms_int4;
const GLint *srcb = program->vs_uniforms_bool;
GLint loc = 0;
665
uint32 i;
666
667
668
assert(count > 0); // shouldn't call this with nothing to do!
669
670
for (i = 0; i < count; i++)
{
671
UniformMap *map = &program->uniforms[i];
672
const MOJOSHADER_shaderType uniform_shader_type = map->shader_type;
673
674
675
const MOJOSHADER_uniform *u = map->uniform;
const MOJOSHADER_uniformType type = u->type;
const int size = u->array_count ? u->array_count : 1;
676
677
assert(!u->constant);
678
679
// Did we switch from vertex to pixel (to geometry, etc)?
680
if (shader_type != uniform_shader_type)
681
{
682
683
// we start with vertex, move to pixel, then to geometry, etc.
// The array should always be sorted as such.
684
if (uniform_shader_type == MOJOSHADER_TYPE_PIXEL)
685
{
686
assert(shader_type == MOJOSHADER_TYPE_VERTEX);
687
688
689
690
691
692
693
srcf = program->ps_uniforms_float4;
srci = program->ps_uniforms_int4;
srcb = program->ps_uniforms_bool;
loc = 0;
} // if
else
{
694
// These should be ordered vertex, then pixel, then geometry.
695
696
assert(0 && "Unexpected shader type");
} // else
697
698
699
shader_type = uniform_shader_type;
arb_shader_type = arb1_shader_type(uniform_shader_type);
700
} // if
701
702
703
704
if (type == MOJOSHADER_UNIFORM_FLOAT)
{
int i;
705
706
for (i = 0; i < size; i++, srcf += 4, loc++)
ctx->glProgramLocalParameter4fvARB(arb_shader_type, loc, srcf);
707
708
709
710
} // if
else if (type == MOJOSHADER_UNIFORM_INT)
{
int i;
711
if (ctx->have_GL_NV_gpu_program4)
712
713
{
// GL_NV_gpu_program4 has integer uniform loading support.
714
715
for (i = 0; i < size; i++, srci += 4, loc++)
ctx->glProgramLocalParameterI4ivNV(arb_shader_type, loc, srci);
716
717
718
} // if
else
{
719
for (i = 0; i < size; i++, srci += 4, loc++)
720
{
721
722
723
724
725
const GLfloat fv[4] = {
(GLfloat) srci[0], (GLfloat) srci[1],
(GLfloat) srci[2], (GLfloat) srci[3]
};
ctx->glProgramLocalParameter4fvARB(arb_shader_type, loc, fv);
726
727
728
729
730
731
} // for
} // else
} // else if
else if (type == MOJOSHADER_UNIFORM_BOOL)
{
int i;
732
if (ctx->have_GL_NV_gpu_program4)
733
734
{
// GL_NV_gpu_program4 has integer uniform loading support.
735
for (i = 0; i < size; i++, srcb++, loc++)
736
{
737
const GLint ib = (GLint) ((*srcb) ? 1 : 0);
738
const GLint iv[4] = { ib, ib, ib, ib };
739
ctx->glProgramLocalParameterI4ivNV(arb_shader_type, loc, iv);
740
741
742
743
} // for
} // if
else
{
744
for (i = 0; i < size; i++, srcb++, loc++)
745
{
746
const GLfloat fb = (GLfloat) ((*srcb) ? 1.0f : 0.0f);
747
const GLfloat fv[4] = { fb, fb, fb, fb };
748
ctx->glProgramLocalParameter4fvARB(arb_shader_type, loc, fv);
749
750
751
752
753
} // for
} // else
} // else if
} // for
} // impl_ARB1_PushUniforms
754
755
static void impl_ARB1_PushSampler(GLint loc, GLuint sampler)
756
757
758
{
// no-op in this profile...arb1 uses the texture units as-is.
assert(loc == (GLint) sampler);
759
} // impl_ARB1_PushSampler
760
761
762
763
764
765
766
767
768
769
#endif // SUPPORT_PROFILE_ARB1
const char *MOJOSHADER_glGetError(void)
{
return error_buffer;
} // MOJOSHADER_glGetError
770
771
static void *loadsym(MOJOSHADER_glGetProcAddress lookup, void *d,
const char *fn, int *ext)
772
773
774
775
{
void *retval = NULL;
if (lookup != NULL)
{
776
retval = lookup(fn, d);
777
778
779
780
if (retval == NULL)
{
char arbfn[64];
snprintf(arbfn, sizeof (arbfn), "%sARB", fn);
781
retval = lookup(arbfn, d);
782
783
784
785
786
787
788
789
790
} // if
} // if
if (retval == NULL)
*ext = 0;
return retval;
} // loadsym
791
static void lookup_entry_points(MOJOSHADER_glGetProcAddress lookup, void *d)
792
{
793
#define DO_LOOKUP(ext, typ, fn) { \
794
ctx->fn = (typ) loadsym(lookup, d, #fn, &ctx->have_##ext); \
795
796
}
797
DO_LOOKUP(base_opengl, PFNGLGETSTRINGPROC, glGetString);
798
DO_LOOKUP(base_opengl, PFNGLGETERRORPROC, glGetError);
799
DO_LOOKUP(base_opengl, PFNGLGETINTEGERVPROC, glGetIntegerv);
800
801
DO_LOOKUP(base_opengl, PFNGLENABLEPROC, glEnable);
DO_LOOKUP(base_opengl, PFNGLDISABLEPROC, glDisable);
802
803
804
805
806
807
808
809
810
811
812
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);
813
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM1IVARBPROC, glUniform1iv);
814
815
816
817
818
819
820
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);
821
822
823
DO_LOOKUP(GL_ARB_vertex_program, PFNGLVERTEXATTRIBPOINTERARBPROC, glVertexAttribPointer);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLGETPROGRAMIVARBPROC, glGetProgramivARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLGETPROGRAMSTRINGARBPROC, glGetProgramStringARB);
824
DO_LOOKUP(GL_ARB_vertex_program, PFNGLPROGRAMLOCALPARAMETER4FVARBPROC, glProgramLocalParameter4fvARB);
825
826
827
828
DO_LOOKUP(GL_ARB_vertex_program, PFNGLDELETEPROGRAMSARBPROC, glDeleteProgramsARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLGENPROGRAMSARBPROC, glGenProgramsARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLBINDPROGRAMARBPROC, glBindProgramARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLPROGRAMSTRINGARBPROC, glProgramStringARB);
829
DO_LOOKUP(GL_NV_gpu_program4, PFNGLPROGRAMLOCALPARAMETERI4IVNVPROC, glProgramLocalParameterI4ivNV);
830
831
832
833
834
835
836
837
838
839
840
#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.
841
842
843
else if (!ctx->have_base_opengl)
return 0; // don't bother checking, we're missing basic functionality.
844
// See if it's in the spec for this GL implementation's version.
845
846
if (major >= 0)
{
847
if ( ((ctx->opengl_major << 16) | (ctx->opengl_minor & 0xFFFF)) >=
848
849
850
((major << 16) | (minor & 0xFFFF)) )
return 1;
} // if
851
852
853
854
855
856
857
858
859
860
861
862
863
864
// 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
865
static void parse_opengl_version_str(const char *verstr, int *maj, int *min)
866
867
{
if (verstr == NULL)
868
*maj = *min = 0;
869
else
870
871
872
873
874
875
876
sscanf(verstr, "%d.%d", maj, min);
} // parse_opengl_version_str
static inline void parse_opengl_version(const char *verstr)
{
parse_opengl_version_str(verstr, &ctx->opengl_major, &ctx->opengl_minor);
877
878
879
} // parse_opengl_version
880
#if SUPPORT_PROFILE_GLSL
881
882
883
884
885
886
887
888
889
890
891
892
static int glsl_version_atleast(int maj, int min)
{
int glslmin = 0;
int glslmaj = 0;
ctx->glGetError(); // flush any existing error state.
const GLenum enumval = GL_SHADING_LANGUAGE_VERSION_ARB;
const char *str = (const char *) ctx->glGetString(enumval);
if (ctx->glGetError() == GL_INVALID_ENUM)
return 0; // this is a basic, 1.0-compliant implementation.
parse_opengl_version_str(str, &glslmaj, &glslmin);
return ( (glslmaj > maj) || ((glslmaj == maj) && (glslmin >= min)) );
} // glsl_version_atleast
893
#endif
894
895
896
static void load_extensions(MOJOSHADER_glGetProcAddress lookup, void *d)
897
{
898
899
const char *extlist = NULL;
900
ctx->have_base_opengl = 1;
901
902
ctx->have_GL_ARB_vertex_program = 1;
ctx->have_GL_ARB_fragment_program = 1;
903
904
ctx->have_GL_NV_vertex_program2_option = 1;
ctx->have_GL_NV_fragment_program2 = 1;
905
ctx->have_GL_NV_vertex_program3 = 1;
906
ctx->have_GL_NV_gpu_program4 = 1;
907
908
909
910
911
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;
912
913
ctx->have_GL_ARB_half_float_vertex = 1;
ctx->have_GL_OES_vertex_half_float = 1;
914
915
lookup_entry_points(lookup, d);
916
917
if (!ctx->have_base_opengl)
918
set_error("missing basic OpenGL entry points");
919
920
921
922
923
else
{
parse_opengl_version((const char *) ctx->glGetString(GL_VERSION));
extlist = (const char *) ctx->glGetString(GL_EXTENSIONS);
} // else
924
925
926
927
928
if (extlist == NULL)
extlist = ""; // just in case.
#define VERIFY_EXT(ext, major, minor) \
929
ctx->have_##ext = verify_extension(#ext, ctx->have_##ext, extlist, major, minor)
930
931
932
VERIFY_EXT(GL_ARB_vertex_program, -1, -1);
VERIFY_EXT(GL_ARB_fragment_program, -1, -1);
933
934
935
936
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);
937
938
VERIFY_EXT(GL_NV_vertex_program2_option, -1, -1);
VERIFY_EXT(GL_NV_fragment_program2, -1, -1);
939
VERIFY_EXT(GL_NV_vertex_program3, -1, -1);
940
VERIFY_EXT(GL_NV_half_float, -1, -1);
941
942
VERIFY_EXT(GL_ARB_half_float_vertex, 3, 0);
VERIFY_EXT(GL_OES_vertex_half_float, -1, -1);
943
944
#undef VERIFY_EXT
945
946
947
948
949
} // load_extensions
static int valid_profile(const char *profile)
{
950
#if SUPPORT_PROFILE_GLSL
951
952
953
954
955
// If running on Mac OS X <= 10.4, don't ever pick GLSL, even if
// the system claims it is available.
#if PLATFORM_MACOSX
const int allow_glsl = macosx_version_atleast(10, 5, 0);
#else
956
const int allow_glsl = 1;
957
#endif
958
#endif
959
960
961
if (!ctx->have_base_opengl)
return 0;
962
963
964
#define MUST_HAVE(p, x) \
if (!ctx->have_##x) { set_error(#p " profile needs " #x); return 0; }
965
966
967
968
969
970
if (profile == NULL)
{
set_error("NULL profile");
return 0;
} // if
971
972
973
974
975
976
977
#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
978
#endif
979
980
#if SUPPORT_PROFILE_ARB1_NV
981
982
983
984
985
986
987
else if (strcmp(profile, MOJOSHADER_PROFILE_NV2) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_ARB_vertex_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_ARB_fragment_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_NV_vertex_program2_option);
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_NV_fragment_program2);
} // else if
988
989
990
991
992
993
994
995
else if (strcmp(profile, MOJOSHADER_PROFILE_NV3) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_ARB_vertex_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_ARB_fragment_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_NV_vertex_program3);
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_NV_fragment_program2);
} // else if
996
997
998
999
1000
else if (strcmp(profile, MOJOSHADER_PROFILE_NV4) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_NV4, GL_NV_gpu_program4);
} // else if