loader: Move non-error message to debug level
[mesa.git] / src / compiler / shader_enums.h
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #ifndef SHADER_ENUMS_H
27 #define SHADER_ENUMS_H
28
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32
33 /**
34 * Shader stages.
35 *
36 * The order must match how shaders are ordered in the pipeline.
37 * The GLSL linker assumes that if i<j, then the j-th shader is
38 * executed later than the i-th shader.
39 */
40 typedef enum
41 {
42 MESA_SHADER_VERTEX = 0,
43 MESA_SHADER_TESS_CTRL = 1,
44 MESA_SHADER_TESS_EVAL = 2,
45 MESA_SHADER_GEOMETRY = 3,
46 MESA_SHADER_FRAGMENT = 4,
47 MESA_SHADER_COMPUTE = 5,
48 } gl_shader_stage;
49
50 const char *gl_shader_stage_name(gl_shader_stage stage);
51
52 /**
53 * Translate a gl_shader_stage to a short shader stage name for debug
54 * printouts and error messages.
55 */
56 const char *_mesa_shader_stage_to_string(unsigned stage);
57
58 /**
59 * Translate a gl_shader_stage to a shader stage abbreviation (VS, GS, FS)
60 * for debug printouts and error messages.
61 */
62 const char *_mesa_shader_stage_to_abbrev(unsigned stage);
63
64 #define MESA_SHADER_STAGES (MESA_SHADER_COMPUTE + 1)
65
66
67 /**
68 * Indexes for vertex program attributes.
69 * GL_NV_vertex_program aliases generic attributes over the conventional
70 * attributes. In GL_ARB_vertex_program shader the aliasing is optional.
71 * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
72 * generic attributes are distinct/separate).
73 */
74 typedef enum
75 {
76 VERT_ATTRIB_POS = 0,
77 VERT_ATTRIB_WEIGHT = 1,
78 VERT_ATTRIB_NORMAL = 2,
79 VERT_ATTRIB_COLOR0 = 3,
80 VERT_ATTRIB_COLOR1 = 4,
81 VERT_ATTRIB_FOG = 5,
82 VERT_ATTRIB_COLOR_INDEX = 6,
83 VERT_ATTRIB_EDGEFLAG = 7,
84 VERT_ATTRIB_TEX0 = 8,
85 VERT_ATTRIB_TEX1 = 9,
86 VERT_ATTRIB_TEX2 = 10,
87 VERT_ATTRIB_TEX3 = 11,
88 VERT_ATTRIB_TEX4 = 12,
89 VERT_ATTRIB_TEX5 = 13,
90 VERT_ATTRIB_TEX6 = 14,
91 VERT_ATTRIB_TEX7 = 15,
92 VERT_ATTRIB_POINT_SIZE = 16,
93 VERT_ATTRIB_GENERIC0 = 17,
94 VERT_ATTRIB_GENERIC1 = 18,
95 VERT_ATTRIB_GENERIC2 = 19,
96 VERT_ATTRIB_GENERIC3 = 20,
97 VERT_ATTRIB_GENERIC4 = 21,
98 VERT_ATTRIB_GENERIC5 = 22,
99 VERT_ATTRIB_GENERIC6 = 23,
100 VERT_ATTRIB_GENERIC7 = 24,
101 VERT_ATTRIB_GENERIC8 = 25,
102 VERT_ATTRIB_GENERIC9 = 26,
103 VERT_ATTRIB_GENERIC10 = 27,
104 VERT_ATTRIB_GENERIC11 = 28,
105 VERT_ATTRIB_GENERIC12 = 29,
106 VERT_ATTRIB_GENERIC13 = 30,
107 VERT_ATTRIB_GENERIC14 = 31,
108 VERT_ATTRIB_GENERIC15 = 32,
109 VERT_ATTRIB_MAX = 33
110 } gl_vert_attrib;
111
112 const char *gl_vert_attrib_name(gl_vert_attrib attrib);
113
114 /**
115 * Symbolic constats to help iterating over
116 * specific blocks of vertex attributes.
117 *
118 * VERT_ATTRIB_FF
119 * includes all fixed function attributes as well as
120 * the aliased GL_NV_vertex_program shader attributes.
121 * VERT_ATTRIB_TEX
122 * include the classic texture coordinate attributes.
123 * Is a subset of VERT_ATTRIB_FF.
124 * VERT_ATTRIB_GENERIC
125 * include the OpenGL 2.0+ GLSL generic shader attributes.
126 * These alias the generic GL_ARB_vertex_shader attributes.
127 */
128 #define VERT_ATTRIB_FF(i) (VERT_ATTRIB_POS + (i))
129 #define VERT_ATTRIB_FF_MAX VERT_ATTRIB_GENERIC0
130
131 #define VERT_ATTRIB_TEX(i) (VERT_ATTRIB_TEX0 + (i))
132 #define VERT_ATTRIB_TEX_MAX MAX_TEXTURE_COORD_UNITS
133
134 #define VERT_ATTRIB_GENERIC(i) (VERT_ATTRIB_GENERIC0 + (i))
135 #define VERT_ATTRIB_GENERIC_MAX MAX_VERTEX_GENERIC_ATTRIBS
136
137 /**
138 * Bitflags for vertex attributes.
139 * These are used in bitfields in many places.
140 */
141 /*@{*/
142 #define VERT_BIT_POS BITFIELD64_BIT(VERT_ATTRIB_POS)
143 #define VERT_BIT_WEIGHT BITFIELD64_BIT(VERT_ATTRIB_WEIGHT)
144 #define VERT_BIT_NORMAL BITFIELD64_BIT(VERT_ATTRIB_NORMAL)
145 #define VERT_BIT_COLOR0 BITFIELD64_BIT(VERT_ATTRIB_COLOR0)
146 #define VERT_BIT_COLOR1 BITFIELD64_BIT(VERT_ATTRIB_COLOR1)
147 #define VERT_BIT_FOG BITFIELD64_BIT(VERT_ATTRIB_FOG)
148 #define VERT_BIT_COLOR_INDEX BITFIELD64_BIT(VERT_ATTRIB_COLOR_INDEX)
149 #define VERT_BIT_EDGEFLAG BITFIELD64_BIT(VERT_ATTRIB_EDGEFLAG)
150 #define VERT_BIT_TEX0 BITFIELD64_BIT(VERT_ATTRIB_TEX0)
151 #define VERT_BIT_TEX1 BITFIELD64_BIT(VERT_ATTRIB_TEX1)
152 #define VERT_BIT_TEX2 BITFIELD64_BIT(VERT_ATTRIB_TEX2)
153 #define VERT_BIT_TEX3 BITFIELD64_BIT(VERT_ATTRIB_TEX3)
154 #define VERT_BIT_TEX4 BITFIELD64_BIT(VERT_ATTRIB_TEX4)
155 #define VERT_BIT_TEX5 BITFIELD64_BIT(VERT_ATTRIB_TEX5)
156 #define VERT_BIT_TEX6 BITFIELD64_BIT(VERT_ATTRIB_TEX6)
157 #define VERT_BIT_TEX7 BITFIELD64_BIT(VERT_ATTRIB_TEX7)
158 #define VERT_BIT_POINT_SIZE BITFIELD64_BIT(VERT_ATTRIB_POINT_SIZE)
159 #define VERT_BIT_GENERIC0 BITFIELD64_BIT(VERT_ATTRIB_GENERIC0)
160
161 #define VERT_BIT(i) BITFIELD64_BIT(i)
162 #define VERT_BIT_ALL BITFIELD64_RANGE(0, VERT_ATTRIB_MAX)
163
164 #define VERT_BIT_FF(i) VERT_BIT(i)
165 #define VERT_BIT_FF_ALL BITFIELD64_RANGE(0, VERT_ATTRIB_FF_MAX)
166 #define VERT_BIT_TEX(i) VERT_BIT(VERT_ATTRIB_TEX(i))
167 #define VERT_BIT_TEX_ALL \
168 BITFIELD64_RANGE(VERT_ATTRIB_TEX(0), VERT_ATTRIB_TEX_MAX)
169
170 #define VERT_BIT_GENERIC(i) VERT_BIT(VERT_ATTRIB_GENERIC(i))
171 #define VERT_BIT_GENERIC_ALL \
172 BITFIELD64_RANGE(VERT_ATTRIB_GENERIC(0), VERT_ATTRIB_GENERIC_MAX)
173 /*@}*/
174
175 #define MAX_VARYING 32 /**< number of float[4] vectors */
176
177 /**
178 * Indexes for vertex shader outputs, geometry shader inputs/outputs, and
179 * fragment shader inputs.
180 *
181 * Note that some of these values are not available to all pipeline stages.
182 *
183 * When this enum is updated, the following code must be updated too:
184 * - vertResults (in prog_print.c's arb_output_attrib_string())
185 * - fragAttribs (in prog_print.c's arb_input_attrib_string())
186 * - _mesa_varying_slot_in_fs()
187 */
188 typedef enum
189 {
190 VARYING_SLOT_POS,
191 VARYING_SLOT_COL0, /* COL0 and COL1 must be contiguous */
192 VARYING_SLOT_COL1,
193 VARYING_SLOT_FOGC,
194 VARYING_SLOT_TEX0, /* TEX0-TEX7 must be contiguous */
195 VARYING_SLOT_TEX1,
196 VARYING_SLOT_TEX2,
197 VARYING_SLOT_TEX3,
198 VARYING_SLOT_TEX4,
199 VARYING_SLOT_TEX5,
200 VARYING_SLOT_TEX6,
201 VARYING_SLOT_TEX7,
202 VARYING_SLOT_PSIZ, /* Does not appear in FS */
203 VARYING_SLOT_BFC0, /* Does not appear in FS */
204 VARYING_SLOT_BFC1, /* Does not appear in FS */
205 VARYING_SLOT_EDGE, /* Does not appear in FS */
206 VARYING_SLOT_CLIP_VERTEX, /* Does not appear in FS */
207 VARYING_SLOT_CLIP_DIST0,
208 VARYING_SLOT_CLIP_DIST1,
209 VARYING_SLOT_CULL_DIST0,
210 VARYING_SLOT_CULL_DIST1,
211 VARYING_SLOT_PRIMITIVE_ID, /* Does not appear in VS */
212 VARYING_SLOT_LAYER, /* Appears as VS or GS output */
213 VARYING_SLOT_VIEWPORT, /* Appears as VS or GS output */
214 VARYING_SLOT_FACE, /* FS only */
215 VARYING_SLOT_PNTC, /* FS only */
216 VARYING_SLOT_TESS_LEVEL_OUTER, /* Only appears as TCS output. */
217 VARYING_SLOT_TESS_LEVEL_INNER, /* Only appears as TCS output. */
218 VARYING_SLOT_BOUNDING_BOX0, /* Only appears as TCS output. */
219 VARYING_SLOT_BOUNDING_BOX1, /* Only appears as TCS output. */
220 VARYING_SLOT_VAR0, /* First generic varying slot */
221 /* the remaining are simply for the benefit of gl_varying_slot_name()
222 * and not to be construed as an upper bound:
223 */
224 VARYING_SLOT_VAR1,
225 VARYING_SLOT_VAR2,
226 VARYING_SLOT_VAR3,
227 VARYING_SLOT_VAR4,
228 VARYING_SLOT_VAR5,
229 VARYING_SLOT_VAR6,
230 VARYING_SLOT_VAR7,
231 VARYING_SLOT_VAR8,
232 VARYING_SLOT_VAR9,
233 VARYING_SLOT_VAR10,
234 VARYING_SLOT_VAR11,
235 VARYING_SLOT_VAR12,
236 VARYING_SLOT_VAR13,
237 VARYING_SLOT_VAR14,
238 VARYING_SLOT_VAR15,
239 VARYING_SLOT_VAR16,
240 VARYING_SLOT_VAR17,
241 VARYING_SLOT_VAR18,
242 VARYING_SLOT_VAR19,
243 VARYING_SLOT_VAR20,
244 VARYING_SLOT_VAR21,
245 VARYING_SLOT_VAR22,
246 VARYING_SLOT_VAR23,
247 VARYING_SLOT_VAR24,
248 VARYING_SLOT_VAR25,
249 VARYING_SLOT_VAR26,
250 VARYING_SLOT_VAR27,
251 VARYING_SLOT_VAR28,
252 VARYING_SLOT_VAR29,
253 VARYING_SLOT_VAR30,
254 VARYING_SLOT_VAR31,
255 } gl_varying_slot;
256
257
258 #define VARYING_SLOT_MAX (VARYING_SLOT_VAR0 + MAX_VARYING)
259 #define VARYING_SLOT_PATCH0 (VARYING_SLOT_MAX)
260 #define VARYING_SLOT_TESS_MAX (VARYING_SLOT_PATCH0 + MAX_VARYING)
261 #define MAX_VARYINGS_INCL_PATCH (VARYING_SLOT_TESS_MAX - VARYING_SLOT_VAR0)
262
263 const char *gl_varying_slot_name(gl_varying_slot slot);
264
265 /**
266 * Bitflags for varying slots.
267 */
268 /*@{*/
269 #define VARYING_BIT_POS BITFIELD64_BIT(VARYING_SLOT_POS)
270 #define VARYING_BIT_COL0 BITFIELD64_BIT(VARYING_SLOT_COL0)
271 #define VARYING_BIT_COL1 BITFIELD64_BIT(VARYING_SLOT_COL1)
272 #define VARYING_BIT_FOGC BITFIELD64_BIT(VARYING_SLOT_FOGC)
273 #define VARYING_BIT_TEX0 BITFIELD64_BIT(VARYING_SLOT_TEX0)
274 #define VARYING_BIT_TEX1 BITFIELD64_BIT(VARYING_SLOT_TEX1)
275 #define VARYING_BIT_TEX2 BITFIELD64_BIT(VARYING_SLOT_TEX2)
276 #define VARYING_BIT_TEX3 BITFIELD64_BIT(VARYING_SLOT_TEX3)
277 #define VARYING_BIT_TEX4 BITFIELD64_BIT(VARYING_SLOT_TEX4)
278 #define VARYING_BIT_TEX5 BITFIELD64_BIT(VARYING_SLOT_TEX5)
279 #define VARYING_BIT_TEX6 BITFIELD64_BIT(VARYING_SLOT_TEX6)
280 #define VARYING_BIT_TEX7 BITFIELD64_BIT(VARYING_SLOT_TEX7)
281 #define VARYING_BIT_TEX(U) BITFIELD64_BIT(VARYING_SLOT_TEX0 + (U))
282 #define VARYING_BITS_TEX_ANY BITFIELD64_RANGE(VARYING_SLOT_TEX0, \
283 MAX_TEXTURE_COORD_UNITS)
284 #define VARYING_BIT_PSIZ BITFIELD64_BIT(VARYING_SLOT_PSIZ)
285 #define VARYING_BIT_BFC0 BITFIELD64_BIT(VARYING_SLOT_BFC0)
286 #define VARYING_BIT_BFC1 BITFIELD64_BIT(VARYING_SLOT_BFC1)
287 #define VARYING_BIT_EDGE BITFIELD64_BIT(VARYING_SLOT_EDGE)
288 #define VARYING_BIT_CLIP_VERTEX BITFIELD64_BIT(VARYING_SLOT_CLIP_VERTEX)
289 #define VARYING_BIT_CLIP_DIST0 BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST0)
290 #define VARYING_BIT_CLIP_DIST1 BITFIELD64_BIT(VARYING_SLOT_CLIP_DIST1)
291 #define VARYING_BIT_CULL_DIST0 BITFIELD64_BIT(VARYING_SLOT_CULL_DIST0)
292 #define VARYING_BIT_CULL_DIST1 BITFIELD64_BIT(VARYING_SLOT_CULL_DIST1)
293 #define VARYING_BIT_PRIMITIVE_ID BITFIELD64_BIT(VARYING_SLOT_PRIMITIVE_ID)
294 #define VARYING_BIT_LAYER BITFIELD64_BIT(VARYING_SLOT_LAYER)
295 #define VARYING_BIT_VIEWPORT BITFIELD64_BIT(VARYING_SLOT_VIEWPORT)
296 #define VARYING_BIT_FACE BITFIELD64_BIT(VARYING_SLOT_FACE)
297 #define VARYING_BIT_PNTC BITFIELD64_BIT(VARYING_SLOT_PNTC)
298 #define VARYING_BIT_TESS_LEVEL_OUTER BITFIELD64_BIT(VARYING_SLOT_TESS_LEVEL_OUTER)
299 #define VARYING_BIT_TESS_LEVEL_INNER BITFIELD64_BIT(VARYING_SLOT_TESS_LEVEL_INNER)
300 #define VARYING_BIT_BOUNDING_BOX0 BITFIELD64_BIT(VARYING_SLOT_BOUNDING_BOX0)
301 #define VARYING_BIT_BOUNDING_BOX1 BITFIELD64_BIT(VARYING_SLOT_BOUNDING_BOX1)
302 #define VARYING_BIT_VAR(V) BITFIELD64_BIT(VARYING_SLOT_VAR0 + (V))
303 /*@}*/
304
305 /**
306 * Bitflags for system values.
307 */
308 #define SYSTEM_BIT_SAMPLE_ID ((uint64_t)1 << SYSTEM_VALUE_SAMPLE_ID)
309 #define SYSTEM_BIT_SAMPLE_POS ((uint64_t)1 << SYSTEM_VALUE_SAMPLE_POS)
310 #define SYSTEM_BIT_SAMPLE_MASK_IN ((uint64_t)1 << SYSTEM_VALUE_SAMPLE_MASK_IN)
311 #define SYSTEM_BIT_LOCAL_INVOCATION_ID ((uint64_t)1 << SYSTEM_VALUE_LOCAL_INVOCATION_ID)
312
313 /**
314 * If the gl_register_file is PROGRAM_SYSTEM_VALUE, the register index will be
315 * one of these values. If a NIR variable's mode is nir_var_system_value, it
316 * will be one of these values.
317 */
318 typedef enum
319 {
320 /**
321 * \name Vertex shader system values
322 */
323 /*@{*/
324 /**
325 * OpenGL-style vertex ID.
326 *
327 * Section 2.11.7 (Shader Execution), subsection Shader Inputs, of the
328 * OpenGL 3.3 core profile spec says:
329 *
330 * "gl_VertexID holds the integer index i implicitly passed by
331 * DrawArrays or one of the other drawing commands defined in section
332 * 2.8.3."
333 *
334 * Section 2.8.3 (Drawing Commands) of the same spec says:
335 *
336 * "The commands....are equivalent to the commands with the same base
337 * name (without the BaseVertex suffix), except that the ith element
338 * transferred by the corresponding draw call will be taken from
339 * element indices[i] + basevertex of each enabled array."
340 *
341 * Additionally, the overview in the GL_ARB_shader_draw_parameters spec
342 * says:
343 *
344 * "In unextended GL, vertex shaders have inputs named gl_VertexID and
345 * gl_InstanceID, which contain, respectively the index of the vertex
346 * and instance. The value of gl_VertexID is the implicitly passed
347 * index of the vertex being processed, which includes the value of
348 * baseVertex, for those commands that accept it."
349 *
350 * gl_VertexID gets basevertex added in. This differs from DirectX where
351 * SV_VertexID does \b not get basevertex added in.
352 *
353 * \note
354 * If all system values are available, \c SYSTEM_VALUE_VERTEX_ID will be
355 * equal to \c SYSTEM_VALUE_VERTEX_ID_ZERO_BASE plus
356 * \c SYSTEM_VALUE_BASE_VERTEX.
357 *
358 * \sa SYSTEM_VALUE_VERTEX_ID_ZERO_BASE, SYSTEM_VALUE_BASE_VERTEX
359 */
360 SYSTEM_VALUE_VERTEX_ID,
361
362 /**
363 * Instanced ID as supplied to gl_InstanceID
364 *
365 * Values assigned to gl_InstanceID always begin with zero, regardless of
366 * the value of baseinstance.
367 *
368 * Section 11.1.3.9 (Shader Inputs) of the OpenGL 4.4 core profile spec
369 * says:
370 *
371 * "gl_InstanceID holds the integer instance number of the current
372 * primitive in an instanced draw call (see section 10.5)."
373 *
374 * Through a big chain of pseudocode, section 10.5 describes that
375 * baseinstance is not counted by gl_InstanceID. In that section, notice
376 *
377 * "If an enabled vertex attribute array is instanced (it has a
378 * non-zero divisor as specified by VertexAttribDivisor), the element
379 * index that is transferred to the GL, for all vertices, is given by
380 *
381 * floor(instance/divisor) + baseinstance
382 *
383 * If an array corresponding to an attribute required by a vertex
384 * shader is not enabled, then the corresponding element is taken from
385 * the current attribute state (see section 10.2)."
386 *
387 * Note that baseinstance is \b not included in the value of instance.
388 */
389 SYSTEM_VALUE_INSTANCE_ID,
390
391 /**
392 * Vulkan InstanceIndex.
393 *
394 * InstanceIndex = gl_InstanceID + gl_BaseInstance
395 */
396 SYSTEM_VALUE_INSTANCE_INDEX,
397
398 /**
399 * DirectX-style vertex ID.
400 *
401 * Unlike \c SYSTEM_VALUE_VERTEX_ID, this system value does \b not include
402 * the value of basevertex.
403 *
404 * \sa SYSTEM_VALUE_VERTEX_ID, SYSTEM_VALUE_BASE_VERTEX
405 */
406 SYSTEM_VALUE_VERTEX_ID_ZERO_BASE,
407
408 /**
409 * Value of \c basevertex passed to \c glDrawElementsBaseVertex and similar
410 * functions.
411 *
412 * \sa SYSTEM_VALUE_VERTEX_ID, SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
413 */
414 SYSTEM_VALUE_BASE_VERTEX,
415
416 /**
417 * Value of \c baseinstance passed to instanced draw entry points
418 *
419 * \sa SYSTEM_VALUE_INSTANCE_ID
420 */
421 SYSTEM_VALUE_BASE_INSTANCE,
422
423 /**
424 * From _ARB_shader_draw_parameters:
425 *
426 * "Additionally, this extension adds a further built-in variable,
427 * gl_DrawID to the shading language. This variable contains the index
428 * of the draw currently being processed by a Multi* variant of a
429 * drawing command (such as MultiDrawElements or
430 * MultiDrawArraysIndirect)."
431 *
432 * If GL_ARB_multi_draw_indirect is not supported, this is always 0.
433 */
434 SYSTEM_VALUE_DRAW_ID,
435 /*@}*/
436
437 /**
438 * \name Geometry shader system values
439 */
440 /*@{*/
441 SYSTEM_VALUE_INVOCATION_ID, /**< (Also in Tessellation Control shader) */
442 /*@}*/
443
444 /**
445 * \name Fragment shader system values
446 */
447 /*@{*/
448 SYSTEM_VALUE_FRAG_COORD,
449 SYSTEM_VALUE_FRONT_FACE,
450 SYSTEM_VALUE_SAMPLE_ID,
451 SYSTEM_VALUE_SAMPLE_POS,
452 SYSTEM_VALUE_SAMPLE_MASK_IN,
453 SYSTEM_VALUE_HELPER_INVOCATION,
454 /*@}*/
455
456 /**
457 * \name Tessellation Evaluation shader system values
458 */
459 /*@{*/
460 SYSTEM_VALUE_TESS_COORD,
461 SYSTEM_VALUE_VERTICES_IN, /**< Tessellation vertices in input patch */
462 SYSTEM_VALUE_PRIMITIVE_ID,
463 SYSTEM_VALUE_TESS_LEVEL_OUTER, /**< TES input */
464 SYSTEM_VALUE_TESS_LEVEL_INNER, /**< TES input */
465 /*@}*/
466
467 /**
468 * \name Compute shader system values
469 */
470 /*@{*/
471 SYSTEM_VALUE_LOCAL_INVOCATION_ID,
472 SYSTEM_VALUE_LOCAL_INVOCATION_INDEX,
473 SYSTEM_VALUE_GLOBAL_INVOCATION_ID,
474 SYSTEM_VALUE_WORK_GROUP_ID,
475 SYSTEM_VALUE_NUM_WORK_GROUPS,
476 SYSTEM_VALUE_LOCAL_GROUP_SIZE,
477 /*@}*/
478
479 /**
480 * Driver internal vertex-count, used (for example) for drivers to
481 * calculate stride for stream-out outputs. Not externally visible.
482 */
483 SYSTEM_VALUE_VERTEX_CNT,
484
485 SYSTEM_VALUE_MAX /**< Number of values */
486 } gl_system_value;
487
488 const char *gl_system_value_name(gl_system_value sysval);
489
490 /**
491 * The possible interpolation qualifiers that can be applied to a fragment
492 * shader input in GLSL.
493 *
494 * Note: INTERP_MODE_NONE must be 0 so that memsetting the
495 * ir_variable data structure to 0 causes the default behavior.
496 */
497 enum glsl_interp_mode
498 {
499 INTERP_MODE_NONE = 0,
500 INTERP_MODE_SMOOTH,
501 INTERP_MODE_FLAT,
502 INTERP_MODE_NOPERSPECTIVE,
503 INTERP_MODE_COUNT /**< Number of interpolation qualifiers */
504 };
505
506 const char *glsl_interp_mode_name(enum glsl_interp_mode qual);
507
508 /**
509 * Fragment program results
510 */
511 typedef enum
512 {
513 FRAG_RESULT_DEPTH = 0,
514 FRAG_RESULT_STENCIL = 1,
515 /* If a single color should be written to all render targets, this
516 * register is written. No FRAG_RESULT_DATAn will be written.
517 */
518 FRAG_RESULT_COLOR = 2,
519 FRAG_RESULT_SAMPLE_MASK = 3,
520
521 /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
522 * or ARB_fragment_program fragment.color[n]) color results. If
523 * any are written, FRAG_RESULT_COLOR will not be written.
524 * FRAG_RESULT_DATA1 and up are simply for the benefit of
525 * gl_frag_result_name() and not to be construed as an upper bound
526 */
527 FRAG_RESULT_DATA0 = 4,
528 FRAG_RESULT_DATA1,
529 FRAG_RESULT_DATA2,
530 FRAG_RESULT_DATA3,
531 FRAG_RESULT_DATA4,
532 FRAG_RESULT_DATA5,
533 FRAG_RESULT_DATA6,
534 FRAG_RESULT_DATA7,
535 } gl_frag_result;
536
537 const char *gl_frag_result_name(gl_frag_result result);
538
539 #define FRAG_RESULT_MAX (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
540
541 /**
542 * \brief Layout qualifiers for gl_FragDepth.
543 *
544 * Extension AMD_conservative_depth allows gl_FragDepth to be redeclared with
545 * a layout qualifier.
546 *
547 * \see enum ir_depth_layout
548 */
549 enum gl_frag_depth_layout
550 {
551 FRAG_DEPTH_LAYOUT_NONE, /**< No layout is specified. */
552 FRAG_DEPTH_LAYOUT_ANY,
553 FRAG_DEPTH_LAYOUT_GREATER,
554 FRAG_DEPTH_LAYOUT_LESS,
555 FRAG_DEPTH_LAYOUT_UNCHANGED
556 };
557
558 /**
559 * \brief Buffer access qualifiers
560 */
561 enum gl_buffer_access_qualifier
562 {
563 ACCESS_COHERENT = 1,
564 ACCESS_RESTRICT = 2,
565 ACCESS_VOLATILE = 4,
566 };
567
568 /**
569 * \brief Blend support qualifiers
570 */
571 enum gl_advanced_blend_mode
572 {
573 BLEND_NONE = 0x0000,
574
575 BLEND_MULTIPLY = 0x0001,
576 BLEND_SCREEN = 0x0002,
577 BLEND_OVERLAY = 0x0004,
578 BLEND_DARKEN = 0x0008,
579 BLEND_LIGHTEN = 0x0010,
580 BLEND_COLORDODGE = 0x0020,
581 BLEND_COLORBURN = 0x0040,
582 BLEND_HARDLIGHT = 0x0080,
583 BLEND_SOFTLIGHT = 0x0100,
584 BLEND_DIFFERENCE = 0x0200,
585 BLEND_EXCLUSION = 0x0400,
586 BLEND_HSL_HUE = 0x0800,
587 BLEND_HSL_SATURATION = 0x1000,
588 BLEND_HSL_COLOR = 0x2000,
589 BLEND_HSL_LUMINOSITY = 0x4000,
590
591 BLEND_ALL = 0x7fff,
592 };
593
594 enum gl_tess_spacing
595 {
596 TESS_SPACING_UNSPECIFIED,
597 TESS_SPACING_EQUAL,
598 TESS_SPACING_FRACTIONAL_ODD,
599 TESS_SPACING_FRACTIONAL_EVEN,
600 };
601
602 #ifdef __cplusplus
603 } /* extern "C" */
604 #endif
605
606 #endif /* SHADER_ENUMS_H */