2 * Copyright © 2010 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
25 #include "glsl_parser_extras.h"
26 #include "glsl_symbol_table.h"
27 #include "main/core.h"
28 #include "main/uniforms.h"
29 #include "program/prog_statevars.h"
30 #include "program/prog_instruction.h"
32 static const struct gl_builtin_uniform_element gl_NumSamples_elements
[] = {
33 {NULL
, {STATE_NUM_SAMPLES
, 0, 0}, SWIZZLE_XXXX
}
36 static const struct gl_builtin_uniform_element gl_DepthRange_elements
[] = {
37 {"near", {STATE_DEPTH_RANGE
, 0, 0}, SWIZZLE_XXXX
},
38 {"far", {STATE_DEPTH_RANGE
, 0, 0}, SWIZZLE_YYYY
},
39 {"diff", {STATE_DEPTH_RANGE
, 0, 0}, SWIZZLE_ZZZZ
},
42 static const struct gl_builtin_uniform_element gl_ClipPlane_elements
[] = {
43 {NULL
, {STATE_CLIPPLANE
, 0, 0}, SWIZZLE_XYZW
}
46 static const struct gl_builtin_uniform_element gl_Point_elements
[] = {
47 {"size", {STATE_POINT_SIZE
}, SWIZZLE_XXXX
},
48 {"sizeMin", {STATE_POINT_SIZE
}, SWIZZLE_YYYY
},
49 {"sizeMax", {STATE_POINT_SIZE
}, SWIZZLE_ZZZZ
},
50 {"fadeThresholdSize", {STATE_POINT_SIZE
}, SWIZZLE_WWWW
},
51 {"distanceConstantAttenuation", {STATE_POINT_ATTENUATION
}, SWIZZLE_XXXX
},
52 {"distanceLinearAttenuation", {STATE_POINT_ATTENUATION
}, SWIZZLE_YYYY
},
53 {"distanceQuadraticAttenuation", {STATE_POINT_ATTENUATION
}, SWIZZLE_ZZZZ
},
56 static const struct gl_builtin_uniform_element gl_FrontMaterial_elements
[] = {
57 {"emission", {STATE_MATERIAL
, 0, STATE_EMISSION
}, SWIZZLE_XYZW
},
58 {"ambient", {STATE_MATERIAL
, 0, STATE_AMBIENT
}, SWIZZLE_XYZW
},
59 {"diffuse", {STATE_MATERIAL
, 0, STATE_DIFFUSE
}, SWIZZLE_XYZW
},
60 {"specular", {STATE_MATERIAL
, 0, STATE_SPECULAR
}, SWIZZLE_XYZW
},
61 {"shininess", {STATE_MATERIAL
, 0, STATE_SHININESS
}, SWIZZLE_XXXX
},
64 static const struct gl_builtin_uniform_element gl_BackMaterial_elements
[] = {
65 {"emission", {STATE_MATERIAL
, 1, STATE_EMISSION
}, SWIZZLE_XYZW
},
66 {"ambient", {STATE_MATERIAL
, 1, STATE_AMBIENT
}, SWIZZLE_XYZW
},
67 {"diffuse", {STATE_MATERIAL
, 1, STATE_DIFFUSE
}, SWIZZLE_XYZW
},
68 {"specular", {STATE_MATERIAL
, 1, STATE_SPECULAR
}, SWIZZLE_XYZW
},
69 {"shininess", {STATE_MATERIAL
, 1, STATE_SHININESS
}, SWIZZLE_XXXX
},
72 static const struct gl_builtin_uniform_element gl_LightSource_elements
[] = {
73 {"ambient", {STATE_LIGHT
, 0, STATE_AMBIENT
}, SWIZZLE_XYZW
},
74 {"diffuse", {STATE_LIGHT
, 0, STATE_DIFFUSE
}, SWIZZLE_XYZW
},
75 {"specular", {STATE_LIGHT
, 0, STATE_SPECULAR
}, SWIZZLE_XYZW
},
76 {"position", {STATE_LIGHT
, 0, STATE_POSITION
}, SWIZZLE_XYZW
},
77 {"halfVector", {STATE_LIGHT
, 0, STATE_HALF_VECTOR
}, SWIZZLE_XYZW
},
78 {"spotDirection", {STATE_LIGHT
, 0, STATE_SPOT_DIRECTION
},
79 MAKE_SWIZZLE4(SWIZZLE_X
,
83 {"spotCosCutoff", {STATE_LIGHT
, 0, STATE_SPOT_DIRECTION
}, SWIZZLE_WWWW
},
84 {"spotCutoff", {STATE_LIGHT
, 0, STATE_SPOT_CUTOFF
}, SWIZZLE_XXXX
},
85 {"spotExponent", {STATE_LIGHT
, 0, STATE_ATTENUATION
}, SWIZZLE_WWWW
},
86 {"constantAttenuation", {STATE_LIGHT
, 0, STATE_ATTENUATION
}, SWIZZLE_XXXX
},
87 {"linearAttenuation", {STATE_LIGHT
, 0, STATE_ATTENUATION
}, SWIZZLE_YYYY
},
88 {"quadraticAttenuation", {STATE_LIGHT
, 0, STATE_ATTENUATION
}, SWIZZLE_ZZZZ
},
91 static const struct gl_builtin_uniform_element gl_LightModel_elements
[] = {
92 {"ambient", {STATE_LIGHTMODEL_AMBIENT
, 0}, SWIZZLE_XYZW
},
95 static const struct gl_builtin_uniform_element gl_FrontLightModelProduct_elements
[] = {
96 {"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR
, 0}, SWIZZLE_XYZW
},
99 static const struct gl_builtin_uniform_element gl_BackLightModelProduct_elements
[] = {
100 {"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR
, 1}, SWIZZLE_XYZW
},
103 static const struct gl_builtin_uniform_element gl_FrontLightProduct_elements
[] = {
104 {"ambient", {STATE_LIGHTPROD
, 0, 0, STATE_AMBIENT
}, SWIZZLE_XYZW
},
105 {"diffuse", {STATE_LIGHTPROD
, 0, 0, STATE_DIFFUSE
}, SWIZZLE_XYZW
},
106 {"specular", {STATE_LIGHTPROD
, 0, 0, STATE_SPECULAR
}, SWIZZLE_XYZW
},
109 static const struct gl_builtin_uniform_element gl_BackLightProduct_elements
[] = {
110 {"ambient", {STATE_LIGHTPROD
, 0, 1, STATE_AMBIENT
}, SWIZZLE_XYZW
},
111 {"diffuse", {STATE_LIGHTPROD
, 0, 1, STATE_DIFFUSE
}, SWIZZLE_XYZW
},
112 {"specular", {STATE_LIGHTPROD
, 0, 1, STATE_SPECULAR
}, SWIZZLE_XYZW
},
115 static const struct gl_builtin_uniform_element gl_TextureEnvColor_elements
[] = {
116 {NULL
, {STATE_TEXENV_COLOR
, 0}, SWIZZLE_XYZW
},
119 static const struct gl_builtin_uniform_element gl_EyePlaneS_elements
[] = {
120 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_EYE_S
}, SWIZZLE_XYZW
},
123 static const struct gl_builtin_uniform_element gl_EyePlaneT_elements
[] = {
124 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_EYE_T
}, SWIZZLE_XYZW
},
127 static const struct gl_builtin_uniform_element gl_EyePlaneR_elements
[] = {
128 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_EYE_R
}, SWIZZLE_XYZW
},
131 static const struct gl_builtin_uniform_element gl_EyePlaneQ_elements
[] = {
132 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_EYE_Q
}, SWIZZLE_XYZW
},
135 static const struct gl_builtin_uniform_element gl_ObjectPlaneS_elements
[] = {
136 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_OBJECT_S
}, SWIZZLE_XYZW
},
139 static const struct gl_builtin_uniform_element gl_ObjectPlaneT_elements
[] = {
140 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_OBJECT_T
}, SWIZZLE_XYZW
},
143 static const struct gl_builtin_uniform_element gl_ObjectPlaneR_elements
[] = {
144 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_OBJECT_R
}, SWIZZLE_XYZW
},
147 static const struct gl_builtin_uniform_element gl_ObjectPlaneQ_elements
[] = {
148 {NULL
, {STATE_TEXGEN
, 0, STATE_TEXGEN_OBJECT_Q
}, SWIZZLE_XYZW
},
151 static const struct gl_builtin_uniform_element gl_Fog_elements
[] = {
152 {"color", {STATE_FOG_COLOR
}, SWIZZLE_XYZW
},
153 {"density", {STATE_FOG_PARAMS
}, SWIZZLE_XXXX
},
154 {"start", {STATE_FOG_PARAMS
}, SWIZZLE_YYYY
},
155 {"end", {STATE_FOG_PARAMS
}, SWIZZLE_ZZZZ
},
156 {"scale", {STATE_FOG_PARAMS
}, SWIZZLE_WWWW
},
159 static const struct gl_builtin_uniform_element gl_NormalScale_elements
[] = {
160 {NULL
, {STATE_NORMAL_SCALE
}, SWIZZLE_XXXX
},
163 static const struct gl_builtin_uniform_element gl_FogParamsOptimizedMESA_elements
[] = {
164 {NULL
, {STATE_INTERNAL
, STATE_FOG_PARAMS_OPTIMIZED
}, SWIZZLE_XYZW
},
167 static const struct gl_builtin_uniform_element gl_CurrentAttribVertMESA_elements
[] = {
168 {NULL
, {STATE_INTERNAL
, STATE_CURRENT_ATTRIB
, 0}, SWIZZLE_XYZW
},
171 static const struct gl_builtin_uniform_element gl_CurrentAttribFragMESA_elements
[] = {
172 {NULL
, {STATE_INTERNAL
, STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED
, 0}, SWIZZLE_XYZW
},
175 #define MATRIX(name, statevar, modifier) \
176 static const struct gl_builtin_uniform_element name ## _elements[] = { \
177 { NULL, { statevar, 0, 0, 0, modifier}, SWIZZLE_XYZW }, \
178 { NULL, { statevar, 0, 1, 1, modifier}, SWIZZLE_XYZW }, \
179 { NULL, { statevar, 0, 2, 2, modifier}, SWIZZLE_XYZW }, \
180 { NULL, { statevar, 0, 3, 3, modifier}, SWIZZLE_XYZW }, \
183 MATRIX(gl_ModelViewMatrix
,
184 STATE_MODELVIEW_MATRIX
, STATE_MATRIX_TRANSPOSE
);
185 MATRIX(gl_ModelViewMatrixInverse
,
186 STATE_MODELVIEW_MATRIX
, STATE_MATRIX_INVTRANS
);
187 MATRIX(gl_ModelViewMatrixTranspose
,
188 STATE_MODELVIEW_MATRIX
, 0);
189 MATRIX(gl_ModelViewMatrixInverseTranspose
,
190 STATE_MODELVIEW_MATRIX
, STATE_MATRIX_INVERSE
);
192 MATRIX(gl_ProjectionMatrix
,
193 STATE_PROJECTION_MATRIX
, STATE_MATRIX_TRANSPOSE
);
194 MATRIX(gl_ProjectionMatrixInverse
,
195 STATE_PROJECTION_MATRIX
, STATE_MATRIX_INVTRANS
);
196 MATRIX(gl_ProjectionMatrixTranspose
,
197 STATE_PROJECTION_MATRIX
, 0);
198 MATRIX(gl_ProjectionMatrixInverseTranspose
,
199 STATE_PROJECTION_MATRIX
, STATE_MATRIX_INVERSE
);
201 MATRIX(gl_ModelViewProjectionMatrix
,
202 STATE_MVP_MATRIX
, STATE_MATRIX_TRANSPOSE
);
203 MATRIX(gl_ModelViewProjectionMatrixInverse
,
204 STATE_MVP_MATRIX
, STATE_MATRIX_INVTRANS
);
205 MATRIX(gl_ModelViewProjectionMatrixTranspose
,
206 STATE_MVP_MATRIX
, 0);
207 MATRIX(gl_ModelViewProjectionMatrixInverseTranspose
,
208 STATE_MVP_MATRIX
, STATE_MATRIX_INVERSE
);
210 MATRIX(gl_TextureMatrix
,
211 STATE_TEXTURE_MATRIX
, STATE_MATRIX_TRANSPOSE
);
212 MATRIX(gl_TextureMatrixInverse
,
213 STATE_TEXTURE_MATRIX
, STATE_MATRIX_INVTRANS
);
214 MATRIX(gl_TextureMatrixTranspose
,
215 STATE_TEXTURE_MATRIX
, 0);
216 MATRIX(gl_TextureMatrixInverseTranspose
,
217 STATE_TEXTURE_MATRIX
, STATE_MATRIX_INVERSE
);
219 static const struct gl_builtin_uniform_element gl_NormalMatrix_elements
[] = {
220 { NULL
, { STATE_MODELVIEW_MATRIX
, 0, 0, 0, STATE_MATRIX_INVERSE
},
221 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_Z
) },
222 { NULL
, { STATE_MODELVIEW_MATRIX
, 0, 1, 1, STATE_MATRIX_INVERSE
},
223 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_Z
) },
224 { NULL
, { STATE_MODELVIEW_MATRIX
, 0, 2, 2, STATE_MATRIX_INVERSE
},
225 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_Y
, SWIZZLE_Z
, SWIZZLE_Z
) },
230 #define STATEVAR(name) {#name, name ## _elements, ARRAY_SIZE(name ## _elements)}
232 static const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc
[] = {
233 STATEVAR(gl_NumSamples
),
234 STATEVAR(gl_DepthRange
),
235 STATEVAR(gl_ClipPlane
),
237 STATEVAR(gl_FrontMaterial
),
238 STATEVAR(gl_BackMaterial
),
239 STATEVAR(gl_LightSource
),
240 STATEVAR(gl_LightModel
),
241 STATEVAR(gl_FrontLightModelProduct
),
242 STATEVAR(gl_BackLightModelProduct
),
243 STATEVAR(gl_FrontLightProduct
),
244 STATEVAR(gl_BackLightProduct
),
245 STATEVAR(gl_TextureEnvColor
),
246 STATEVAR(gl_EyePlaneS
),
247 STATEVAR(gl_EyePlaneT
),
248 STATEVAR(gl_EyePlaneR
),
249 STATEVAR(gl_EyePlaneQ
),
250 STATEVAR(gl_ObjectPlaneS
),
251 STATEVAR(gl_ObjectPlaneT
),
252 STATEVAR(gl_ObjectPlaneR
),
253 STATEVAR(gl_ObjectPlaneQ
),
256 STATEVAR(gl_ModelViewMatrix
),
257 STATEVAR(gl_ModelViewMatrixInverse
),
258 STATEVAR(gl_ModelViewMatrixTranspose
),
259 STATEVAR(gl_ModelViewMatrixInverseTranspose
),
261 STATEVAR(gl_ProjectionMatrix
),
262 STATEVAR(gl_ProjectionMatrixInverse
),
263 STATEVAR(gl_ProjectionMatrixTranspose
),
264 STATEVAR(gl_ProjectionMatrixInverseTranspose
),
266 STATEVAR(gl_ModelViewProjectionMatrix
),
267 STATEVAR(gl_ModelViewProjectionMatrixInverse
),
268 STATEVAR(gl_ModelViewProjectionMatrixTranspose
),
269 STATEVAR(gl_ModelViewProjectionMatrixInverseTranspose
),
271 STATEVAR(gl_TextureMatrix
),
272 STATEVAR(gl_TextureMatrixInverse
),
273 STATEVAR(gl_TextureMatrixTranspose
),
274 STATEVAR(gl_TextureMatrixInverseTranspose
),
276 STATEVAR(gl_NormalMatrix
),
277 STATEVAR(gl_NormalScale
),
279 STATEVAR(gl_FogParamsOptimizedMESA
),
280 STATEVAR(gl_CurrentAttribVertMESA
),
281 STATEVAR(gl_CurrentAttribFragMESA
),
290 * Data structure that accumulates fields for the gl_PerVertex interface
293 class per_vertex_accumulator
296 per_vertex_accumulator();
297 void add_field(int slot
, const glsl_type
*type
, const char *name
);
298 const glsl_type
*construct_interface_instance() const;
301 glsl_struct_field fields
[10];
306 per_vertex_accumulator::per_vertex_accumulator()
314 per_vertex_accumulator::add_field(int slot
, const glsl_type
*type
,
317 assert(this->num_fields
< ARRAY_SIZE(this->fields
));
318 this->fields
[this->num_fields
].type
= type
;
319 this->fields
[this->num_fields
].name
= name
;
320 this->fields
[this->num_fields
].matrix_layout
= GLSL_MATRIX_LAYOUT_INHERITED
;
321 this->fields
[this->num_fields
].location
= slot
;
322 this->fields
[this->num_fields
].interpolation
= INTERP_QUALIFIER_NONE
;
323 this->fields
[this->num_fields
].centroid
= 0;
324 this->fields
[this->num_fields
].sample
= 0;
330 per_vertex_accumulator::construct_interface_instance() const
332 return glsl_type::get_interface_instance(this->fields
, this->num_fields
,
333 GLSL_INTERFACE_PACKING_STD140
,
338 class builtin_variable_generator
341 builtin_variable_generator(exec_list
*instructions
,
342 struct _mesa_glsl_parse_state
*state
);
343 void generate_constants();
344 void generate_uniforms();
345 void generate_vs_special_vars();
346 void generate_tcs_special_vars();
347 void generate_tes_special_vars();
348 void generate_gs_special_vars();
349 void generate_fs_special_vars();
350 void generate_cs_special_vars();
351 void generate_varyings();
354 const glsl_type
*array(const glsl_type
*base
, unsigned elements
)
356 return glsl_type::get_array_instance(base
, elements
);
359 const glsl_type
*type(const char *name
)
361 return symtab
->get_type(name
);
364 ir_variable
*add_input(int slot
, const glsl_type
*type
, const char *name
)
366 return add_variable(name
, type
, ir_var_shader_in
, slot
);
369 ir_variable
*add_output(int slot
, const glsl_type
*type
, const char *name
)
371 return add_variable(name
, type
, ir_var_shader_out
, slot
);
374 ir_variable
*add_system_value(int slot
, const glsl_type
*type
,
377 return add_variable(name
, type
, ir_var_system_value
, slot
);
380 ir_variable
*add_variable(const char *name
, const glsl_type
*type
,
381 enum ir_variable_mode mode
, int slot
);
382 ir_variable
*add_uniform(const glsl_type
*type
, const char *name
);
383 ir_variable
*add_const(const char *name
, int value
);
384 ir_variable
*add_const_ivec3(const char *name
, int x
, int y
, int z
);
385 void add_varying(int slot
, const glsl_type
*type
, const char *name
,
386 const char *name_as_gs_input
);
388 exec_list
* const instructions
;
389 struct _mesa_glsl_parse_state
* const state
;
390 glsl_symbol_table
* const symtab
;
393 * True if compatibility-profile-only variables should be included. (In
394 * desktop GL, these are always included when the GLSL version is 1.30 and
397 const bool compatibility
;
399 const glsl_type
* const bool_t
;
400 const glsl_type
* const int_t
;
401 const glsl_type
* const float_t
;
402 const glsl_type
* const vec2_t
;
403 const glsl_type
* const vec3_t
;
404 const glsl_type
* const vec4_t
;
405 const glsl_type
* const mat3_t
;
406 const glsl_type
* const mat4_t
;
408 per_vertex_accumulator per_vertex_in
;
409 per_vertex_accumulator per_vertex_out
;
413 builtin_variable_generator::builtin_variable_generator(
414 exec_list
*instructions
, struct _mesa_glsl_parse_state
*state
)
415 : instructions(instructions
), state(state
), symtab(state
->symbols
),
416 compatibility(!state
->is_version(140, 100)),
417 bool_t(glsl_type::bool_type
), int_t(glsl_type::int_type
),
418 float_t(glsl_type::float_type
), vec2_t(glsl_type::vec2_type
),
419 vec3_t(glsl_type::vec3_type
), vec4_t(glsl_type::vec4_type
),
420 mat3_t(glsl_type::mat3_type
), mat4_t(glsl_type::mat4_type
)
426 builtin_variable_generator::add_variable(const char *name
,
427 const glsl_type
*type
,
428 enum ir_variable_mode mode
, int slot
)
430 ir_variable
*var
= new(symtab
) ir_variable(type
, name
, mode
);
431 var
->data
.how_declared
= ir_var_declared_implicitly
;
433 switch (var
->data
.mode
) {
435 case ir_var_shader_in
:
437 case ir_var_system_value
:
438 var
->data
.read_only
= true;
440 case ir_var_shader_out
:
441 case ir_var_shader_storage
:
444 /* The only variables that are added using this function should be
445 * uniforms, shader storage, shader inputs, and shader outputs, constants
446 * (which use ir_var_auto), and system values.
452 var
->data
.location
= slot
;
453 var
->data
.explicit_location
= (slot
>= 0);
454 var
->data
.explicit_index
= 0;
456 /* Once the variable is created an initialized, add it to the symbol table
457 * and add the declaration to the IR stream.
459 instructions
->push_tail(var
);
461 symtab
->add_variable(var
);
467 builtin_variable_generator::add_uniform(const glsl_type
*type
,
470 ir_variable
*const uni
= add_variable(name
, type
, ir_var_uniform
, -1);
473 for (i
= 0; _mesa_builtin_uniform_desc
[i
].name
!= NULL
; i
++) {
474 if (strcmp(_mesa_builtin_uniform_desc
[i
].name
, name
) == 0) {
479 assert(_mesa_builtin_uniform_desc
[i
].name
!= NULL
);
480 const struct gl_builtin_uniform_desc
* const statevar
=
481 &_mesa_builtin_uniform_desc
[i
];
483 const unsigned array_count
= type
->is_array() ? type
->length
: 1;
485 ir_state_slot
*slots
=
486 uni
->allocate_state_slots(array_count
* statevar
->num_elements
);
488 for (unsigned a
= 0; a
< array_count
; a
++) {
489 for (unsigned j
= 0; j
< statevar
->num_elements
; j
++) {
490 const struct gl_builtin_uniform_element
*element
=
491 &statevar
->elements
[j
];
493 memcpy(slots
->tokens
, element
->tokens
, sizeof(element
->tokens
));
494 if (type
->is_array()) {
495 if (strcmp(name
, "gl_CurrentAttribVertMESA") == 0 ||
496 strcmp(name
, "gl_CurrentAttribFragMESA") == 0) {
497 slots
->tokens
[2] = a
;
499 slots
->tokens
[1] = a
;
503 slots
->swizzle
= element
->swizzle
;
513 builtin_variable_generator::add_const(const char *name
, int value
)
515 ir_variable
*const var
= add_variable(name
, glsl_type::int_type
,
517 var
->constant_value
= new(var
) ir_constant(value
);
518 var
->constant_initializer
= new(var
) ir_constant(value
);
519 var
->data
.has_initializer
= true;
525 builtin_variable_generator::add_const_ivec3(const char *name
, int x
, int y
,
528 ir_variable
*const var
= add_variable(name
, glsl_type::ivec3_type
,
530 ir_constant_data data
;
531 memset(&data
, 0, sizeof(data
));
535 var
->constant_value
= new(var
) ir_constant(glsl_type::ivec3_type
, &data
);
536 var
->constant_initializer
=
537 new(var
) ir_constant(glsl_type::ivec3_type
, &data
);
538 var
->data
.has_initializer
= true;
544 builtin_variable_generator::generate_constants()
546 add_const("gl_MaxVertexAttribs", state
->Const
.MaxVertexAttribs
);
547 add_const("gl_MaxVertexTextureImageUnits",
548 state
->Const
.MaxVertexTextureImageUnits
);
549 add_const("gl_MaxCombinedTextureImageUnits",
550 state
->Const
.MaxCombinedTextureImageUnits
);
551 add_const("gl_MaxTextureImageUnits", state
->Const
.MaxTextureImageUnits
);
552 add_const("gl_MaxDrawBuffers", state
->Const
.MaxDrawBuffers
);
554 /* Max uniforms/varyings: GLSL ES counts these in units of vectors; desktop
555 * GL counts them in units of "components" or "floats".
557 if (state
->es_shader
) {
558 add_const("gl_MaxVertexUniformVectors",
559 state
->Const
.MaxVertexUniformComponents
/ 4);
560 add_const("gl_MaxFragmentUniformVectors",
561 state
->Const
.MaxFragmentUniformComponents
/ 4);
563 /* In GLSL ES 3.00, gl_MaxVaryingVectors was split out to separate
564 * vertex and fragment shader constants.
566 if (state
->is_version(0, 300)) {
567 add_const("gl_MaxVertexOutputVectors",
568 state
->ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
/ 4);
569 add_const("gl_MaxFragmentInputVectors",
570 state
->ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
/ 4);
572 add_const("gl_MaxVaryingVectors",
573 state
->ctx
->Const
.MaxVarying
);
576 add_const("gl_MaxVertexUniformComponents",
577 state
->Const
.MaxVertexUniformComponents
);
579 /* Note: gl_MaxVaryingFloats was deprecated in GLSL 1.30+, but not
582 add_const("gl_MaxVaryingFloats", state
->ctx
->Const
.MaxVarying
* 4);
584 add_const("gl_MaxFragmentUniformComponents",
585 state
->Const
.MaxFragmentUniformComponents
);
588 /* Texel offsets were introduced in ARB_shading_language_420pack (which
589 * requires desktop GLSL version 130), and adopted into desktop GLSL
590 * version 4.20 and GLSL ES version 3.00.
592 if ((state
->is_version(130, 0) &&
593 state
->ARB_shading_language_420pack_enable
) ||
594 state
->is_version(420, 300)) {
595 add_const("gl_MinProgramTexelOffset",
596 state
->Const
.MinProgramTexelOffset
);
597 add_const("gl_MaxProgramTexelOffset",
598 state
->Const
.MaxProgramTexelOffset
);
601 if (state
->is_version(130, 0)) {
602 add_const("gl_MaxClipDistances", state
->Const
.MaxClipPlanes
);
603 add_const("gl_MaxVaryingComponents", state
->ctx
->Const
.MaxVarying
* 4);
606 if (state
->is_version(150, 0)) {
607 add_const("gl_MaxVertexOutputComponents",
608 state
->Const
.MaxVertexOutputComponents
);
609 add_const("gl_MaxGeometryInputComponents",
610 state
->Const
.MaxGeometryInputComponents
);
611 add_const("gl_MaxGeometryOutputComponents",
612 state
->Const
.MaxGeometryOutputComponents
);
613 add_const("gl_MaxFragmentInputComponents",
614 state
->Const
.MaxFragmentInputComponents
);
615 add_const("gl_MaxGeometryTextureImageUnits",
616 state
->Const
.MaxGeometryTextureImageUnits
);
617 add_const("gl_MaxGeometryOutputVertices",
618 state
->Const
.MaxGeometryOutputVertices
);
619 add_const("gl_MaxGeometryTotalOutputComponents",
620 state
->Const
.MaxGeometryTotalOutputComponents
);
621 add_const("gl_MaxGeometryUniformComponents",
622 state
->Const
.MaxGeometryUniformComponents
);
624 /* Note: the GLSL 1.50-4.40 specs require
625 * gl_MaxGeometryVaryingComponents to be present, and to be at least 64.
626 * But they do not define what it means (and there does not appear to be
627 * any corresponding constant in the GL specs). However,
628 * ARB_geometry_shader4 defines MAX_GEOMETRY_VARYING_COMPONENTS_ARB to
629 * be the maximum number of components available for use as geometry
630 * outputs. So we assume this is a synonym for
631 * gl_MaxGeometryOutputComponents.
633 add_const("gl_MaxGeometryVaryingComponents",
634 state
->Const
.MaxGeometryOutputComponents
);
638 /* Note: gl_MaxLights stopped being listed as an explicit constant in
639 * GLSL 1.30, however it continues to be referred to (as a minimum size
640 * for compatibility-mode uniforms) all the way up through GLSL 4.30, so
641 * this seems like it was probably an oversight.
643 add_const("gl_MaxLights", state
->Const
.MaxLights
);
645 add_const("gl_MaxClipPlanes", state
->Const
.MaxClipPlanes
);
647 /* Note: gl_MaxTextureUnits wasn't made compatibility-only until GLSL
648 * 1.50, however this seems like it was probably an oversight.
650 add_const("gl_MaxTextureUnits", state
->Const
.MaxTextureUnits
);
652 /* Note: gl_MaxTextureCoords was left out of GLSL 1.40, but it was
653 * re-introduced in GLSL 1.50, so this seems like it was probably an
656 add_const("gl_MaxTextureCoords", state
->Const
.MaxTextureCoords
);
659 if (state
->has_atomic_counters()) {
660 add_const("gl_MaxVertexAtomicCounters",
661 state
->Const
.MaxVertexAtomicCounters
);
662 add_const("gl_MaxFragmentAtomicCounters",
663 state
->Const
.MaxFragmentAtomicCounters
);
664 add_const("gl_MaxCombinedAtomicCounters",
665 state
->Const
.MaxCombinedAtomicCounters
);
666 add_const("gl_MaxAtomicCounterBindings",
667 state
->Const
.MaxAtomicBufferBindings
);
669 /* When Mesa adds support for GL_OES_geometry_shader and
670 * GL_OES_tessellation_shader, this will need to change.
672 if (!state
->es_shader
) {
673 add_const("gl_MaxGeometryAtomicCounters",
674 state
->Const
.MaxGeometryAtomicCounters
);
676 if (state
->is_version(400, 0) ||
677 state
->ARB_tessellation_shader_enable
) {
678 add_const("gl_MaxTessControlAtomicCounters",
679 state
->Const
.MaxTessControlAtomicCounters
);
680 add_const("gl_MaxTessEvaluationAtomicCounters",
681 state
->Const
.MaxTessEvaluationAtomicCounters
);
686 if (state
->is_version(420, 310)) {
687 add_const("gl_MaxVertexAtomicCounterBuffers",
688 state
->Const
.MaxVertexAtomicCounterBuffers
);
689 add_const("gl_MaxFragmentAtomicCounterBuffers",
690 state
->Const
.MaxFragmentAtomicCounterBuffers
);
691 add_const("gl_MaxCombinedAtomicCounterBuffers",
692 state
->Const
.MaxCombinedAtomicCounterBuffers
);
693 add_const("gl_MaxAtomicCounterBufferSize",
694 state
->Const
.MaxAtomicCounterBufferSize
);
696 /* When Mesa adds support for GL_OES_geometry_shader and
697 * GL_OES_tessellation_shader, this will need to change.
699 if (!state
->es_shader
) {
700 add_const("gl_MaxGeometryAtomicCounterBuffers",
701 state
->Const
.MaxGeometryAtomicCounterBuffers
);
702 add_const("gl_MaxTessControlAtomicCounterBuffers",
703 state
->Const
.MaxTessControlAtomicCounterBuffers
);
704 add_const("gl_MaxTessEvaluationAtomicCounterBuffers",
705 state
->Const
.MaxTessEvaluationAtomicCounterBuffers
);
709 if (state
->is_version(430, 0) || state
->ARB_compute_shader_enable
) {
710 add_const("gl_MaxComputeAtomicCounterBuffers", MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS
);
711 add_const("gl_MaxComputeAtomicCounters", MAX_COMPUTE_ATOMIC_COUNTERS
);
712 add_const("gl_MaxComputeImageUniforms", MAX_COMPUTE_IMAGE_UNIFORMS
);
713 add_const("gl_MaxComputeTextureImageUnits", MAX_COMPUTE_TEXTURE_IMAGE_UNITS
);
714 add_const("gl_MaxComputeUniformComponents", MAX_COMPUTE_UNIFORM_COMPONENTS
);
716 add_const_ivec3("gl_MaxComputeWorkGroupCount",
717 state
->Const
.MaxComputeWorkGroupCount
[0],
718 state
->Const
.MaxComputeWorkGroupCount
[1],
719 state
->Const
.MaxComputeWorkGroupCount
[2]);
720 add_const_ivec3("gl_MaxComputeWorkGroupSize",
721 state
->Const
.MaxComputeWorkGroupSize
[0],
722 state
->Const
.MaxComputeWorkGroupSize
[1],
723 state
->Const
.MaxComputeWorkGroupSize
[2]);
725 /* From the GLSL 4.40 spec, section 7.1 (Built-In Language Variables):
727 * The built-in constant gl_WorkGroupSize is a compute-shader
728 * constant containing the local work-group size of the shader. The
729 * size of the work group in the X, Y, and Z dimensions is stored in
730 * the x, y, and z components. The constants values in
731 * gl_WorkGroupSize will match those specified in the required
732 * local_size_x, local_size_y, and local_size_z layout qualifiers
733 * for the current shader. This is a constant so that it can be
734 * used to size arrays of memory that can be shared within the local
735 * work group. It is a compile-time error to use gl_WorkGroupSize
736 * in a shader that does not declare a fixed local group size, or
737 * before that shader has declared a fixed local group size, using
738 * local_size_x, local_size_y, and local_size_z.
740 * To prevent the shader from trying to refer to gl_WorkGroupSize before
741 * the layout declaration, we don't define it here. Intead we define it
742 * in ast_cs_input_layout::hir().
746 if (state
->is_version(420, 0) ||
747 state
->ARB_shader_image_load_store_enable
) {
748 add_const("gl_MaxImageUnits",
749 state
->Const
.MaxImageUnits
);
750 add_const("gl_MaxCombinedImageUnitsAndFragmentOutputs",
751 state
->Const
.MaxCombinedImageUnitsAndFragmentOutputs
);
752 add_const("gl_MaxImageSamples",
753 state
->Const
.MaxImageSamples
);
754 add_const("gl_MaxVertexImageUniforms",
755 state
->Const
.MaxVertexImageUniforms
);
756 add_const("gl_MaxTessControlImageUniforms", 0);
757 add_const("gl_MaxTessEvaluationImageUniforms", 0);
758 add_const("gl_MaxGeometryImageUniforms",
759 state
->Const
.MaxGeometryImageUniforms
);
760 add_const("gl_MaxFragmentImageUniforms",
761 state
->Const
.MaxFragmentImageUniforms
);
762 add_const("gl_MaxCombinedImageUniforms",
763 state
->Const
.MaxCombinedImageUniforms
);
765 if (state
->is_version(400, 0) ||
766 state
->ARB_tessellation_shader_enable
) {
767 add_const("gl_MaxTessControlImageUniforms",
768 state
->Const
.MaxTessControlImageUniforms
);
769 add_const("gl_MaxTessEvaluationImageUniforms",
770 state
->Const
.MaxTessEvaluationImageUniforms
);
774 if (state
->is_version(410, 0) ||
775 state
->ARB_viewport_array_enable
)
776 add_const("gl_MaxViewports", state
->Const
.MaxViewports
);
778 if (state
->is_version(400, 0) ||
779 state
->ARB_tessellation_shader_enable
) {
780 add_const("gl_MaxPatchVertices", state
->Const
.MaxPatchVertices
);
781 add_const("gl_MaxTessGenLevel", state
->Const
.MaxTessGenLevel
);
782 add_const("gl_MaxTessControlInputComponents", state
->Const
.MaxTessControlInputComponents
);
783 add_const("gl_MaxTessControlOutputComponents", state
->Const
.MaxTessControlOutputComponents
);
784 add_const("gl_MaxTessControlTextureImageUnits", state
->Const
.MaxTessControlTextureImageUnits
);
785 add_const("gl_MaxTessEvaluationInputComponents", state
->Const
.MaxTessEvaluationInputComponents
);
786 add_const("gl_MaxTessEvaluationOutputComponents", state
->Const
.MaxTessEvaluationOutputComponents
);
787 add_const("gl_MaxTessEvaluationTextureImageUnits", state
->Const
.MaxTessEvaluationTextureImageUnits
);
788 add_const("gl_MaxTessPatchComponents", state
->Const
.MaxTessPatchComponents
);
789 add_const("gl_MaxTessControlTotalOutputComponents", state
->Const
.MaxTessControlTotalOutputComponents
);
790 add_const("gl_MaxTessControlUniformComponents", state
->Const
.MaxTessControlUniformComponents
);
791 add_const("gl_MaxTessEvaluationUniformComponents", state
->Const
.MaxTessEvaluationUniformComponents
);
797 * Generate uniform variables (which exist in all types of shaders).
800 builtin_variable_generator::generate_uniforms()
802 if (state
->is_version(400, 0) || state
->ARB_sample_shading_enable
)
803 add_uniform(int_t
, "gl_NumSamples");
804 add_uniform(type("gl_DepthRangeParameters"), "gl_DepthRange");
805 add_uniform(array(vec4_t
, VERT_ATTRIB_MAX
), "gl_CurrentAttribVertMESA");
806 add_uniform(array(vec4_t
, VARYING_SLOT_MAX
), "gl_CurrentAttribFragMESA");
809 add_uniform(mat4_t
, "gl_ModelViewMatrix");
810 add_uniform(mat4_t
, "gl_ProjectionMatrix");
811 add_uniform(mat4_t
, "gl_ModelViewProjectionMatrix");
812 add_uniform(mat3_t
, "gl_NormalMatrix");
813 add_uniform(mat4_t
, "gl_ModelViewMatrixInverse");
814 add_uniform(mat4_t
, "gl_ProjectionMatrixInverse");
815 add_uniform(mat4_t
, "gl_ModelViewProjectionMatrixInverse");
816 add_uniform(mat4_t
, "gl_ModelViewMatrixTranspose");
817 add_uniform(mat4_t
, "gl_ProjectionMatrixTranspose");
818 add_uniform(mat4_t
, "gl_ModelViewProjectionMatrixTranspose");
819 add_uniform(mat4_t
, "gl_ModelViewMatrixInverseTranspose");
820 add_uniform(mat4_t
, "gl_ProjectionMatrixInverseTranspose");
821 add_uniform(mat4_t
, "gl_ModelViewProjectionMatrixInverseTranspose");
822 add_uniform(float_t
, "gl_NormalScale");
823 add_uniform(type("gl_LightModelParameters"), "gl_LightModel");
824 add_uniform(vec4_t
, "gl_FogParamsOptimizedMESA");
826 const glsl_type
*const mat4_array_type
=
827 array(mat4_t
, state
->Const
.MaxTextureCoords
);
828 add_uniform(mat4_array_type
, "gl_TextureMatrix");
829 add_uniform(mat4_array_type
, "gl_TextureMatrixInverse");
830 add_uniform(mat4_array_type
, "gl_TextureMatrixTranspose");
831 add_uniform(mat4_array_type
, "gl_TextureMatrixInverseTranspose");
833 add_uniform(array(vec4_t
, state
->Const
.MaxClipPlanes
), "gl_ClipPlane");
834 add_uniform(type("gl_PointParameters"), "gl_Point");
836 const glsl_type
*const material_parameters_type
=
837 type("gl_MaterialParameters");
838 add_uniform(material_parameters_type
, "gl_FrontMaterial");
839 add_uniform(material_parameters_type
, "gl_BackMaterial");
841 add_uniform(array(type("gl_LightSourceParameters"),
842 state
->Const
.MaxLights
),
845 const glsl_type
*const light_model_products_type
=
846 type("gl_LightModelProducts");
847 add_uniform(light_model_products_type
, "gl_FrontLightModelProduct");
848 add_uniform(light_model_products_type
, "gl_BackLightModelProduct");
850 const glsl_type
*const light_products_type
=
851 array(type("gl_LightProducts"), state
->Const
.MaxLights
);
852 add_uniform(light_products_type
, "gl_FrontLightProduct");
853 add_uniform(light_products_type
, "gl_BackLightProduct");
855 add_uniform(array(vec4_t
, state
->Const
.MaxTextureUnits
),
856 "gl_TextureEnvColor");
858 const glsl_type
*const texcoords_vec4
=
859 array(vec4_t
, state
->Const
.MaxTextureCoords
);
860 add_uniform(texcoords_vec4
, "gl_EyePlaneS");
861 add_uniform(texcoords_vec4
, "gl_EyePlaneT");
862 add_uniform(texcoords_vec4
, "gl_EyePlaneR");
863 add_uniform(texcoords_vec4
, "gl_EyePlaneQ");
864 add_uniform(texcoords_vec4
, "gl_ObjectPlaneS");
865 add_uniform(texcoords_vec4
, "gl_ObjectPlaneT");
866 add_uniform(texcoords_vec4
, "gl_ObjectPlaneR");
867 add_uniform(texcoords_vec4
, "gl_ObjectPlaneQ");
869 add_uniform(type("gl_FogParameters"), "gl_Fog");
875 * Generate variables which only exist in vertex shaders.
878 builtin_variable_generator::generate_vs_special_vars()
880 if (state
->is_version(130, 300))
881 add_system_value(SYSTEM_VALUE_VERTEX_ID
, int_t
, "gl_VertexID");
882 if (state
->ARB_draw_instanced_enable
)
883 add_system_value(SYSTEM_VALUE_INSTANCE_ID
, int_t
, "gl_InstanceIDARB");
884 if (state
->ARB_draw_instanced_enable
|| state
->is_version(140, 300))
885 add_system_value(SYSTEM_VALUE_INSTANCE_ID
, int_t
, "gl_InstanceID");
886 if (state
->AMD_vertex_shader_layer_enable
)
887 add_output(VARYING_SLOT_LAYER
, int_t
, "gl_Layer");
888 if (state
->AMD_vertex_shader_viewport_index_enable
)
889 add_output(VARYING_SLOT_VIEWPORT
, int_t
, "gl_ViewportIndex");
891 add_input(VERT_ATTRIB_POS
, vec4_t
, "gl_Vertex");
892 add_input(VERT_ATTRIB_NORMAL
, vec3_t
, "gl_Normal");
893 add_input(VERT_ATTRIB_COLOR0
, vec4_t
, "gl_Color");
894 add_input(VERT_ATTRIB_COLOR1
, vec4_t
, "gl_SecondaryColor");
895 add_input(VERT_ATTRIB_TEX0
, vec4_t
, "gl_MultiTexCoord0");
896 add_input(VERT_ATTRIB_TEX1
, vec4_t
, "gl_MultiTexCoord1");
897 add_input(VERT_ATTRIB_TEX2
, vec4_t
, "gl_MultiTexCoord2");
898 add_input(VERT_ATTRIB_TEX3
, vec4_t
, "gl_MultiTexCoord3");
899 add_input(VERT_ATTRIB_TEX4
, vec4_t
, "gl_MultiTexCoord4");
900 add_input(VERT_ATTRIB_TEX5
, vec4_t
, "gl_MultiTexCoord5");
901 add_input(VERT_ATTRIB_TEX6
, vec4_t
, "gl_MultiTexCoord6");
902 add_input(VERT_ATTRIB_TEX7
, vec4_t
, "gl_MultiTexCoord7");
903 add_input(VERT_ATTRIB_FOG
, float_t
, "gl_FogCoord");
909 * Generate variables which only exist in tessellation control shaders.
912 builtin_variable_generator::generate_tcs_special_vars()
914 add_system_value(SYSTEM_VALUE_PRIMITIVE_ID
, int_t
, "gl_PrimitiveID");
915 add_system_value(SYSTEM_VALUE_VERTICES_IN
, int_t
, "gl_PatchVerticesIn");
916 add_system_value(SYSTEM_VALUE_INVOCATION_ID
, int_t
, "gl_InvocationID");
918 add_output(VARYING_SLOT_TESS_LEVEL_OUTER
, array(float_t
, 4),
919 "gl_TessLevelOuter")->data
.patch
= 1;
920 add_output(VARYING_SLOT_TESS_LEVEL_INNER
, array(float_t
, 2),
921 "gl_TessLevelInner")->data
.patch
= 1;
926 * Generate variables which only exist in tessellation evaluation shaders.
929 builtin_variable_generator::generate_tes_special_vars()
931 add_system_value(SYSTEM_VALUE_PRIMITIVE_ID
, int_t
, "gl_PrimitiveID");
932 add_system_value(SYSTEM_VALUE_VERTICES_IN
, int_t
, "gl_PatchVerticesIn");
933 add_system_value(SYSTEM_VALUE_TESS_COORD
, vec3_t
, "gl_TessCoord");
934 add_system_value(SYSTEM_VALUE_TESS_LEVEL_OUTER
, array(float_t
, 4),
935 "gl_TessLevelOuter");
936 add_system_value(SYSTEM_VALUE_TESS_LEVEL_INNER
, array(float_t
, 2),
937 "gl_TessLevelInner");
942 * Generate variables which only exist in geometry shaders.
945 builtin_variable_generator::generate_gs_special_vars()
947 add_output(VARYING_SLOT_LAYER
, int_t
, "gl_Layer");
948 if (state
->is_version(410, 0) || state
->ARB_viewport_array_enable
)
949 add_output(VARYING_SLOT_VIEWPORT
, int_t
, "gl_ViewportIndex");
950 if (state
->is_version(400, 0) || state
->ARB_gpu_shader5_enable
)
951 add_system_value(SYSTEM_VALUE_INVOCATION_ID
, int_t
, "gl_InvocationID");
953 /* Although gl_PrimitiveID appears in tessellation control and tessellation
954 * evaluation shaders, it has a different function there than it has in
955 * geometry shaders, so we treat it (and its counterpart gl_PrimitiveIDIn)
956 * as special geometry shader variables.
958 * Note that although the general convention of suffixing geometry shader
959 * input varyings with "In" was not adopted into GLSL 1.50, it is used in
960 * the specific case of gl_PrimitiveIDIn. So we don't need to treat
961 * gl_PrimitiveIDIn as an {ARB,EXT}_geometry_shader4-only variable.
964 var
= add_input(VARYING_SLOT_PRIMITIVE_ID
, int_t
, "gl_PrimitiveIDIn");
965 var
->data
.interpolation
= INTERP_QUALIFIER_FLAT
;
966 var
= add_output(VARYING_SLOT_PRIMITIVE_ID
, int_t
, "gl_PrimitiveID");
967 var
->data
.interpolation
= INTERP_QUALIFIER_FLAT
;
972 * Generate variables which only exist in fragment shaders.
975 builtin_variable_generator::generate_fs_special_vars()
977 add_input(VARYING_SLOT_POS
, vec4_t
, "gl_FragCoord");
978 add_input(VARYING_SLOT_FACE
, bool_t
, "gl_FrontFacing");
979 if (state
->is_version(120, 100))
980 add_input(VARYING_SLOT_PNTC
, vec2_t
, "gl_PointCoord");
982 if (state
->is_version(150, 0)) {
984 add_input(VARYING_SLOT_PRIMITIVE_ID
, int_t
, "gl_PrimitiveID");
985 var
->data
.interpolation
= INTERP_QUALIFIER_FLAT
;
988 /* gl_FragColor and gl_FragData were deprecated starting in desktop GLSL
989 * 1.30, and were relegated to the compatibility profile in GLSL 4.20.
990 * They were removed from GLSL ES 3.00.
992 if (compatibility
|| !state
->is_version(420, 300)) {
993 add_output(FRAG_RESULT_COLOR
, vec4_t
, "gl_FragColor");
994 add_output(FRAG_RESULT_DATA0
,
995 array(vec4_t
, state
->Const
.MaxDrawBuffers
), "gl_FragData");
998 /* gl_FragDepth has always been in desktop GLSL, but did not appear in GLSL
1001 if (state
->is_version(110, 300))
1002 add_output(FRAG_RESULT_DEPTH
, float_t
, "gl_FragDepth");
1004 if (state
->ARB_shader_stencil_export_enable
) {
1005 ir_variable
*const var
=
1006 add_output(FRAG_RESULT_STENCIL
, int_t
, "gl_FragStencilRefARB");
1007 if (state
->ARB_shader_stencil_export_warn
)
1008 var
->enable_extension_warning("GL_ARB_shader_stencil_export");
1011 if (state
->AMD_shader_stencil_export_enable
) {
1012 ir_variable
*const var
=
1013 add_output(FRAG_RESULT_STENCIL
, int_t
, "gl_FragStencilRefAMD");
1014 if (state
->AMD_shader_stencil_export_warn
)
1015 var
->enable_extension_warning("GL_AMD_shader_stencil_export");
1018 if (state
->is_version(400, 0) || state
->ARB_sample_shading_enable
) {
1019 add_system_value(SYSTEM_VALUE_SAMPLE_ID
, int_t
, "gl_SampleID");
1020 add_system_value(SYSTEM_VALUE_SAMPLE_POS
, vec2_t
, "gl_SamplePosition");
1021 /* From the ARB_sample_shading specification:
1022 * "The number of elements in the array is ceil(<s>/32), where
1023 * <s> is the maximum number of color samples supported by the
1025 * Since no drivers expose more than 32x MSAA, we can simply set
1026 * the array size to 1 rather than computing it.
1028 add_output(FRAG_RESULT_SAMPLE_MASK
, array(int_t
, 1), "gl_SampleMask");
1031 if (state
->is_version(400, 0) || state
->ARB_gpu_shader5_enable
) {
1032 add_system_value(SYSTEM_VALUE_SAMPLE_MASK_IN
, array(int_t
, 1), "gl_SampleMaskIn");
1035 if (state
->is_version(430, 0) || state
->ARB_fragment_layer_viewport_enable
) {
1036 add_input(VARYING_SLOT_LAYER
, int_t
, "gl_Layer");
1037 add_input(VARYING_SLOT_VIEWPORT
, int_t
, "gl_ViewportIndex");
1043 * Generate variables which only exist in compute shaders.
1046 builtin_variable_generator::generate_cs_special_vars()
1048 /* TODO: finish this. */
1053 * Add a single "varying" variable. The variable's type and direction (input
1054 * or output) are adjusted as appropriate for the type of shader being
1055 * compiled. For geometry shaders using {ARB,EXT}_geometry_shader4,
1056 * name_as_gs_input is used for the input (to avoid ambiguity).
1059 builtin_variable_generator::add_varying(int slot
, const glsl_type
*type
,
1061 const char *name_as_gs_input
)
1063 switch (state
->stage
) {
1064 case MESA_SHADER_TESS_CTRL
:
1065 case MESA_SHADER_TESS_EVAL
:
1066 case MESA_SHADER_GEOMETRY
:
1067 this->per_vertex_in
.add_field(slot
, type
, name
);
1069 case MESA_SHADER_VERTEX
:
1070 this->per_vertex_out
.add_field(slot
, type
, name
);
1072 case MESA_SHADER_FRAGMENT
:
1073 add_input(slot
, type
, name
);
1075 case MESA_SHADER_COMPUTE
:
1076 /* Compute shaders don't have varyings. */
1083 * Generate variables that are used to communicate data from one shader stage
1084 * to the next ("varyings").
1087 builtin_variable_generator::generate_varyings()
1089 #define ADD_VARYING(loc, type, name) \
1090 add_varying(loc, type, name, name "In")
1092 /* gl_Position and gl_PointSize are not visible from fragment shaders. */
1093 if (state
->stage
!= MESA_SHADER_FRAGMENT
) {
1094 ADD_VARYING(VARYING_SLOT_POS
, vec4_t
, "gl_Position");
1095 ADD_VARYING(VARYING_SLOT_PSIZ
, float_t
, "gl_PointSize");
1098 if (state
->is_version(130, 0)) {
1099 ADD_VARYING(VARYING_SLOT_CLIP_DIST0
, array(float_t
, 0),
1103 if (compatibility
) {
1104 ADD_VARYING(VARYING_SLOT_TEX0
, array(vec4_t
, 0), "gl_TexCoord");
1105 ADD_VARYING(VARYING_SLOT_FOGC
, float_t
, "gl_FogFragCoord");
1106 if (state
->stage
== MESA_SHADER_FRAGMENT
) {
1107 ADD_VARYING(VARYING_SLOT_COL0
, vec4_t
, "gl_Color");
1108 ADD_VARYING(VARYING_SLOT_COL1
, vec4_t
, "gl_SecondaryColor");
1110 ADD_VARYING(VARYING_SLOT_CLIP_VERTEX
, vec4_t
, "gl_ClipVertex");
1111 ADD_VARYING(VARYING_SLOT_COL0
, vec4_t
, "gl_FrontColor");
1112 ADD_VARYING(VARYING_SLOT_BFC0
, vec4_t
, "gl_BackColor");
1113 ADD_VARYING(VARYING_SLOT_COL1
, vec4_t
, "gl_FrontSecondaryColor");
1114 ADD_VARYING(VARYING_SLOT_BFC1
, vec4_t
, "gl_BackSecondaryColor");
1118 /* Section 7.1 (Built-In Language Variables) of the GLSL 4.00 spec
1121 * "In the tessellation control language, built-in variables are
1122 * intrinsically declared as:
1126 * float gl_PointSize;
1127 * float gl_ClipDistance[];
1128 * } gl_in[gl_MaxPatchVertices];"
1130 if (state
->stage
== MESA_SHADER_TESS_CTRL
||
1131 state
->stage
== MESA_SHADER_TESS_EVAL
) {
1132 const glsl_type
*per_vertex_in_type
=
1133 this->per_vertex_in
.construct_interface_instance();
1134 add_variable("gl_in", array(per_vertex_in_type
, state
->Const
.MaxPatchVertices
),
1135 ir_var_shader_in
, -1);
1137 if (state
->stage
== MESA_SHADER_GEOMETRY
) {
1138 const glsl_type
*per_vertex_in_type
=
1139 this->per_vertex_in
.construct_interface_instance();
1140 add_variable("gl_in", array(per_vertex_in_type
, 0),
1141 ir_var_shader_in
, -1);
1143 if (state
->stage
== MESA_SHADER_TESS_CTRL
) {
1144 const glsl_type
*per_vertex_out_type
=
1145 this->per_vertex_out
.construct_interface_instance();
1146 add_variable("gl_out", array(per_vertex_out_type
, 0),
1147 ir_var_shader_out
, -1);
1149 if (state
->stage
== MESA_SHADER_VERTEX
||
1150 state
->stage
== MESA_SHADER_TESS_EVAL
||
1151 state
->stage
== MESA_SHADER_GEOMETRY
) {
1152 const glsl_type
*per_vertex_out_type
=
1153 this->per_vertex_out
.construct_interface_instance();
1154 const glsl_struct_field
*fields
= per_vertex_out_type
->fields
.structure
;
1155 for (unsigned i
= 0; i
< per_vertex_out_type
->length
; i
++) {
1157 add_variable(fields
[i
].name
, fields
[i
].type
, ir_var_shader_out
,
1158 fields
[i
].location
);
1159 var
->data
.interpolation
= fields
[i
].interpolation
;
1160 var
->data
.centroid
= fields
[i
].centroid
;
1161 var
->data
.sample
= fields
[i
].sample
;
1162 var
->init_interface_type(per_vertex_out_type
);
1168 }; /* Anonymous namespace */
1172 _mesa_glsl_initialize_variables(exec_list
*instructions
,
1173 struct _mesa_glsl_parse_state
*state
)
1175 builtin_variable_generator
gen(instructions
, state
);
1177 gen
.generate_constants();
1178 gen
.generate_uniforms();
1180 gen
.generate_varyings();
1182 switch (state
->stage
) {
1183 case MESA_SHADER_VERTEX
:
1184 gen
.generate_vs_special_vars();
1186 case MESA_SHADER_TESS_CTRL
:
1187 gen
.generate_tcs_special_vars();
1189 case MESA_SHADER_TESS_EVAL
:
1190 gen
.generate_tes_special_vars();
1192 case MESA_SHADER_GEOMETRY
:
1193 gen
.generate_gs_special_vars();
1195 case MESA_SHADER_FRAGMENT
:
1196 gen
.generate_fs_special_vars();
1198 case MESA_SHADER_COMPUTE
:
1199 gen
.generate_cs_special_vars();