Bug Summary

File:root/firefox-clang/third_party/rust/glslopt/glsl-optimizer/src/compiler/glsl/builtin_variables.cpp
Warning:line 629, column 3
Null pointer passed to 1st parameter expecting 'nonnull'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name builtin_variables.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/root/firefox-clang/third_party/rust/glslopt -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/root/firefox-clang/third_party/rust/glslopt -resource-dir /usr/lib/llvm-21/lib/clang/21 -include /root/firefox-clang/config/gcc_hidden.h -include /root/firefox-clang/obj-x86_64-pc-linux-gnu/mozilla-config.h -I glsl-optimizer/include -I glsl-optimizer/src/mesa -I glsl-optimizer/src/mapi -I glsl-optimizer/src/compiler -I glsl-optimizer/src/compiler/glsl -I glsl-optimizer/src/gallium/auxiliary -I glsl-optimizer/src/gallium/include -I glsl-optimizer/src -I glsl-optimizer/src/util -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/stl_wrappers -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D _GLIBCXX_ASSERTIONS -D DEBUG=1 -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -D MOZILLA_CONFIG_H -D __STDC_FORMAT_MACROS -D _GNU_SOURCE -D HAVE_ENDIAN_H -D HAVE_PTHREAD -D HAVE_TIMESPEC_GET -D MOZ_INCLUDE_MOZALLOC_H -D mozilla_throw_gcc_h -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=pessimizing-move -Wno-error=large-by-value-copy=128 -Wno-error=implicit-int-float-conversion -Wno-error=thread-safety-analysis -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -fdeprecated-macro -ferror-limit 19 -fstrict-flex-arrays=1 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fno-rtti -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fno-sized-deallocation -fno-aligned-allocation -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2025-06-27-100320-3286336-1 -x c++ glsl-optimizer/src/compiler/glsl/builtin_variables.cpp
1/*
2 * Copyright © 2010 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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.
22 */
23
24
25/**
26 * Building this file with MinGW g++ 7.3 or 7.4 with:
27 * scons platform=windows toolchain=crossmingw machine=x86 build=profile
28 * triggers an internal compiler error.
29 * Overriding the optimization level to -O1 works around the issue.
30 * MinGW 5.3.1 does not seem to have the bug, neither does 8.3. So for now
31 * we're simply testing for version 7.x here.
32 */
33#if defined(__MINGW32__) && __GNUC__4 == 7
34#warning "disabling optimizations for this file to work around compiler bug in MinGW gcc 7.x"
35#pragma GCC optimize("O1")
36#endif
37
38
39#include "ir.h"
40#include "ir_builder.h"
41#include "linker.h"
42#include "glsl_parser_extras.h"
43#include "glsl_symbol_table.h"
44#include "main/mtypes.h"
45#include "main/uniforms.h"
46#include "program/prog_statevars.h"
47#include "program/prog_instruction.h"
48#include "builtin_functions.h"
49
50using namespace ir_builder;
51
52static const struct gl_builtin_uniform_element gl_NumSamples_elements[] = {
53 {NULL__null, {STATE_NUM_SAMPLES, 0, 0}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))}
54};
55
56static const struct gl_builtin_uniform_element gl_DepthRange_elements[] = {
57 {"near", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
58 {"far", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_YYYY(((1)<<0) | ((1)<<3) | ((1)<<6) | ((1)<<
9))},
59 {"diff", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_ZZZZ(((2)<<0) | ((2)<<3) | ((2)<<6) | ((2)<<
9))},
60};
61
62static const struct gl_builtin_uniform_element gl_ClipPlane_elements[] = {
63 {NULL__null, {STATE_CLIPPLANE, 0, 0}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))}
64};
65
66static const struct gl_builtin_uniform_element gl_Point_elements[] = {
67 {"size", {STATE_POINT_SIZE}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
68 {"sizeMin", {STATE_POINT_SIZE}, SWIZZLE_YYYY(((1)<<0) | ((1)<<3) | ((1)<<6) | ((1)<<
9))},
69 {"sizeMax", {STATE_POINT_SIZE}, SWIZZLE_ZZZZ(((2)<<0) | ((2)<<3) | ((2)<<6) | ((2)<<
9))},
70 {"fadeThresholdSize", {STATE_POINT_SIZE}, SWIZZLE_WWWW(((3)<<0) | ((3)<<3) | ((3)<<6) | ((3)<<
9))},
71 {"distanceConstantAttenuation", {STATE_POINT_ATTENUATION}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
72 {"distanceLinearAttenuation", {STATE_POINT_ATTENUATION}, SWIZZLE_YYYY(((1)<<0) | ((1)<<3) | ((1)<<6) | ((1)<<
9))},
73 {"distanceQuadraticAttenuation", {STATE_POINT_ATTENUATION}, SWIZZLE_ZZZZ(((2)<<0) | ((2)<<3) | ((2)<<6) | ((2)<<
9))},
74};
75
76static const struct gl_builtin_uniform_element gl_FrontMaterial_elements[] = {
77 {"emission", {STATE_MATERIAL, 0, STATE_EMISSION}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
78 {"ambient", {STATE_MATERIAL, 0, STATE_AMBIENT}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
79 {"diffuse", {STATE_MATERIAL, 0, STATE_DIFFUSE}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
80 {"specular", {STATE_MATERIAL, 0, STATE_SPECULAR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
81 {"shininess", {STATE_MATERIAL, 0, STATE_SHININESS}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
82};
83
84static const struct gl_builtin_uniform_element gl_BackMaterial_elements[] = {
85 {"emission", {STATE_MATERIAL, 1, STATE_EMISSION}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
86 {"ambient", {STATE_MATERIAL, 1, STATE_AMBIENT}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
87 {"diffuse", {STATE_MATERIAL, 1, STATE_DIFFUSE}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
88 {"specular", {STATE_MATERIAL, 1, STATE_SPECULAR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
89 {"shininess", {STATE_MATERIAL, 1, STATE_SHININESS}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
90};
91
92static const struct gl_builtin_uniform_element gl_LightSource_elements[] = {
93 {"ambient", {STATE_LIGHT, 0, STATE_AMBIENT}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
94 {"diffuse", {STATE_LIGHT, 0, STATE_DIFFUSE}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
95 {"specular", {STATE_LIGHT, 0, STATE_SPECULAR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
96 {"position", {STATE_LIGHT, 0, STATE_POSITION}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
97 {"halfVector", {STATE_LIGHT, 0, STATE_HALF_VECTOR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
98 {"spotDirection", {STATE_LIGHT, 0, STATE_SPOT_DIRECTION},
99 MAKE_SWIZZLE4(SWIZZLE_X,(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9))
100 SWIZZLE_Y,(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9))
101 SWIZZLE_Z,(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9))
102 SWIZZLE_Z)(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9))},
103 {"spotExponent", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_WWWW(((3)<<0) | ((3)<<3) | ((3)<<6) | ((3)<<
9))},
104 {"spotCutoff", {STATE_LIGHT, 0, STATE_SPOT_CUTOFF}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
105 {"spotCosCutoff", {STATE_LIGHT, 0, STATE_SPOT_DIRECTION}, SWIZZLE_WWWW(((3)<<0) | ((3)<<3) | ((3)<<6) | ((3)<<
9))},
106 {"constantAttenuation", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
107 {"linearAttenuation", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_YYYY(((1)<<0) | ((1)<<3) | ((1)<<6) | ((1)<<
9))},
108 {"quadraticAttenuation", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_ZZZZ(((2)<<0) | ((2)<<3) | ((2)<<6) | ((2)<<
9))},
109};
110
111static const struct gl_builtin_uniform_element gl_LightModel_elements[] = {
112 {"ambient", {STATE_LIGHTMODEL_AMBIENT, 0}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
113};
114
115static const struct gl_builtin_uniform_element gl_FrontLightModelProduct_elements[] = {
116 {"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR, 0}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
117};
118
119static const struct gl_builtin_uniform_element gl_BackLightModelProduct_elements[] = {
120 {"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR, 1}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
121};
122
123static const struct gl_builtin_uniform_element gl_FrontLightProduct_elements[] = {
124 {"ambient", {STATE_LIGHTPROD, 0, 0, STATE_AMBIENT}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
125 {"diffuse", {STATE_LIGHTPROD, 0, 0, STATE_DIFFUSE}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
126 {"specular", {STATE_LIGHTPROD, 0, 0, STATE_SPECULAR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
127};
128
129static const struct gl_builtin_uniform_element gl_BackLightProduct_elements[] = {
130 {"ambient", {STATE_LIGHTPROD, 0, 1, STATE_AMBIENT}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
131 {"diffuse", {STATE_LIGHTPROD, 0, 1, STATE_DIFFUSE}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
132 {"specular", {STATE_LIGHTPROD, 0, 1, STATE_SPECULAR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
133};
134
135static const struct gl_builtin_uniform_element gl_TextureEnvColor_elements[] = {
136 {NULL__null, {STATE_TEXENV_COLOR, 0}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
137};
138
139static const struct gl_builtin_uniform_element gl_EyePlaneS_elements[] = {
140 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_S}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
141};
142
143static const struct gl_builtin_uniform_element gl_EyePlaneT_elements[] = {
144 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_T}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
145};
146
147static const struct gl_builtin_uniform_element gl_EyePlaneR_elements[] = {
148 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_R}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
149};
150
151static const struct gl_builtin_uniform_element gl_EyePlaneQ_elements[] = {
152 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_Q}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
153};
154
155static const struct gl_builtin_uniform_element gl_ObjectPlaneS_elements[] = {
156 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_S}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
157};
158
159static const struct gl_builtin_uniform_element gl_ObjectPlaneT_elements[] = {
160 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_T}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
161};
162
163static const struct gl_builtin_uniform_element gl_ObjectPlaneR_elements[] = {
164 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_R}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
165};
166
167static const struct gl_builtin_uniform_element gl_ObjectPlaneQ_elements[] = {
168 {NULL__null, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_Q}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
169};
170
171static const struct gl_builtin_uniform_element gl_Fog_elements[] = {
172 {"color", {STATE_FOG_COLOR}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
173 {"density", {STATE_FOG_PARAMS}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
174 {"start", {STATE_FOG_PARAMS}, SWIZZLE_YYYY(((1)<<0) | ((1)<<3) | ((1)<<6) | ((1)<<
9))},
175 {"end", {STATE_FOG_PARAMS}, SWIZZLE_ZZZZ(((2)<<0) | ((2)<<3) | ((2)<<6) | ((2)<<
9))},
176 {"scale", {STATE_FOG_PARAMS}, SWIZZLE_WWWW(((3)<<0) | ((3)<<3) | ((3)<<6) | ((3)<<
9))},
177};
178
179static const struct gl_builtin_uniform_element gl_NormalScale_elements[] = {
180 {NULL__null, {STATE_NORMAL_SCALE}, SWIZZLE_XXXX(((0)<<0) | ((0)<<3) | ((0)<<6) | ((0)<<
9))},
181};
182
183static const struct gl_builtin_uniform_element gl_FogParamsOptimizedMESA_elements[] = {
184 {NULL__null, {STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
185};
186
187static const struct gl_builtin_uniform_element gl_CurrentAttribVertMESA_elements[] = {
188 {NULL__null, {STATE_INTERNAL, STATE_CURRENT_ATTRIB, 0}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
189};
190
191static const struct gl_builtin_uniform_element gl_CurrentAttribFragMESA_elements[] = {
192 {NULL__null, {STATE_INTERNAL, STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED, 0}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9))},
193};
194
195#define MATRIX(name, statevar, modifier) \
196 static const struct gl_builtin_uniform_element name ## _elements[] = { \
197 { NULL__null, { statevar, 0, 0, 0, modifier}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9)) }, \
198 { NULL__null, { statevar, 0, 1, 1, modifier}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9)) }, \
199 { NULL__null, { statevar, 0, 2, 2, modifier}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9)) }, \
200 { NULL__null, { statevar, 0, 3, 3, modifier}, SWIZZLE_XYZW(((0)<<0) | ((1)<<3) | ((2)<<6) | ((3)<<
9)) }, \
201 }
202
203MATRIX(gl_ModelViewMatrix,
204 STATE_MODELVIEW_MATRIX, STATE_MATRIX_TRANSPOSE);
205MATRIX(gl_ModelViewMatrixInverse,
206 STATE_MODELVIEW_MATRIX, STATE_MATRIX_INVTRANS);
207MATRIX(gl_ModelViewMatrixTranspose,
208 STATE_MODELVIEW_MATRIX, 0);
209MATRIX(gl_ModelViewMatrixInverseTranspose,
210 STATE_MODELVIEW_MATRIX, STATE_MATRIX_INVERSE);
211
212MATRIX(gl_ProjectionMatrix,
213 STATE_PROJECTION_MATRIX, STATE_MATRIX_TRANSPOSE);
214MATRIX(gl_ProjectionMatrixInverse,
215 STATE_PROJECTION_MATRIX, STATE_MATRIX_INVTRANS);
216MATRIX(gl_ProjectionMatrixTranspose,
217 STATE_PROJECTION_MATRIX, 0);
218MATRIX(gl_ProjectionMatrixInverseTranspose,
219 STATE_PROJECTION_MATRIX, STATE_MATRIX_INVERSE);
220
221MATRIX(gl_ModelViewProjectionMatrix,
222 STATE_MVP_MATRIX, STATE_MATRIX_TRANSPOSE);
223MATRIX(gl_ModelViewProjectionMatrixInverse,
224 STATE_MVP_MATRIX, STATE_MATRIX_INVTRANS);
225MATRIX(gl_ModelViewProjectionMatrixTranspose,
226 STATE_MVP_MATRIX, 0);
227MATRIX(gl_ModelViewProjectionMatrixInverseTranspose,
228 STATE_MVP_MATRIX, STATE_MATRIX_INVERSE);
229
230MATRIX(gl_TextureMatrix,
231 STATE_TEXTURE_MATRIX, STATE_MATRIX_TRANSPOSE);
232MATRIX(gl_TextureMatrixInverse,
233 STATE_TEXTURE_MATRIX, STATE_MATRIX_INVTRANS);
234MATRIX(gl_TextureMatrixTranspose,
235 STATE_TEXTURE_MATRIX, 0);
236MATRIX(gl_TextureMatrixInverseTranspose,
237 STATE_TEXTURE_MATRIX, STATE_MATRIX_INVERSE);
238
239static const struct gl_builtin_uniform_element gl_NormalMatrix_elements[] = {
240 { NULL__null, { STATE_MODELVIEW_MATRIX, 0, 0, 0, STATE_MATRIX_INVERSE},
241 MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z)(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9)) },
242 { NULL__null, { STATE_MODELVIEW_MATRIX, 0, 1, 1, STATE_MATRIX_INVERSE},
243 MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z)(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9)) },
244 { NULL__null, { STATE_MODELVIEW_MATRIX, 0, 2, 2, STATE_MATRIX_INVERSE},
245 MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z)(((0)<<0) | ((1)<<3) | ((2)<<6) | ((2)<<
9)) },
246};
247
248#undef MATRIX
249
250#define STATEVAR(name){"name", name_elements, (sizeof(name_elements) / sizeof((name_elements
)[0]))} {#name, name ## _elements, ARRAY_SIZE(name ## _elements)(sizeof(name ## _elements) / sizeof((name ## _elements)[0]))}
251
252static const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
253 STATEVAR(gl_NumSamples){"gl_NumSamples", gl_NumSamples_elements, (sizeof(gl_NumSamples_elements
) / sizeof((gl_NumSamples_elements)[0]))},
254 STATEVAR(gl_DepthRange){"gl_DepthRange", gl_DepthRange_elements, (sizeof(gl_DepthRange_elements
) / sizeof((gl_DepthRange_elements)[0]))},
255 STATEVAR(gl_ClipPlane){"gl_ClipPlane", gl_ClipPlane_elements, (sizeof(gl_ClipPlane_elements
) / sizeof((gl_ClipPlane_elements)[0]))},
256 STATEVAR(gl_Point){"gl_Point", gl_Point_elements, (sizeof(gl_Point_elements) / sizeof
((gl_Point_elements)[0]))},
257 STATEVAR(gl_FrontMaterial){"gl_FrontMaterial", gl_FrontMaterial_elements, (sizeof(gl_FrontMaterial_elements
) / sizeof((gl_FrontMaterial_elements)[0]))},
258 STATEVAR(gl_BackMaterial){"gl_BackMaterial", gl_BackMaterial_elements, (sizeof(gl_BackMaterial_elements
) / sizeof((gl_BackMaterial_elements)[0]))},
259 STATEVAR(gl_LightSource){"gl_LightSource", gl_LightSource_elements, (sizeof(gl_LightSource_elements
) / sizeof((gl_LightSource_elements)[0]))},
260 STATEVAR(gl_LightModel){"gl_LightModel", gl_LightModel_elements, (sizeof(gl_LightModel_elements
) / sizeof((gl_LightModel_elements)[0]))},
261 STATEVAR(gl_FrontLightModelProduct){"gl_FrontLightModelProduct", gl_FrontLightModelProduct_elements
, (sizeof(gl_FrontLightModelProduct_elements) / sizeof((gl_FrontLightModelProduct_elements
)[0]))},
262 STATEVAR(gl_BackLightModelProduct){"gl_BackLightModelProduct", gl_BackLightModelProduct_elements
, (sizeof(gl_BackLightModelProduct_elements) / sizeof((gl_BackLightModelProduct_elements
)[0]))},
263 STATEVAR(gl_FrontLightProduct){"gl_FrontLightProduct", gl_FrontLightProduct_elements, (sizeof
(gl_FrontLightProduct_elements) / sizeof((gl_FrontLightProduct_elements
)[0]))},
264 STATEVAR(gl_BackLightProduct){"gl_BackLightProduct", gl_BackLightProduct_elements, (sizeof
(gl_BackLightProduct_elements) / sizeof((gl_BackLightProduct_elements
)[0]))},
265 STATEVAR(gl_TextureEnvColor){"gl_TextureEnvColor", gl_TextureEnvColor_elements, (sizeof(gl_TextureEnvColor_elements
) / sizeof((gl_TextureEnvColor_elements)[0]))},
266 STATEVAR(gl_EyePlaneS){"gl_EyePlaneS", gl_EyePlaneS_elements, (sizeof(gl_EyePlaneS_elements
) / sizeof((gl_EyePlaneS_elements)[0]))},
267 STATEVAR(gl_EyePlaneT){"gl_EyePlaneT", gl_EyePlaneT_elements, (sizeof(gl_EyePlaneT_elements
) / sizeof((gl_EyePlaneT_elements)[0]))},
268 STATEVAR(gl_EyePlaneR){"gl_EyePlaneR", gl_EyePlaneR_elements, (sizeof(gl_EyePlaneR_elements
) / sizeof((gl_EyePlaneR_elements)[0]))},
269 STATEVAR(gl_EyePlaneQ){"gl_EyePlaneQ", gl_EyePlaneQ_elements, (sizeof(gl_EyePlaneQ_elements
) / sizeof((gl_EyePlaneQ_elements)[0]))},
270 STATEVAR(gl_ObjectPlaneS){"gl_ObjectPlaneS", gl_ObjectPlaneS_elements, (sizeof(gl_ObjectPlaneS_elements
) / sizeof((gl_ObjectPlaneS_elements)[0]))},
271 STATEVAR(gl_ObjectPlaneT){"gl_ObjectPlaneT", gl_ObjectPlaneT_elements, (sizeof(gl_ObjectPlaneT_elements
) / sizeof((gl_ObjectPlaneT_elements)[0]))},
272 STATEVAR(gl_ObjectPlaneR){"gl_ObjectPlaneR", gl_ObjectPlaneR_elements, (sizeof(gl_ObjectPlaneR_elements
) / sizeof((gl_ObjectPlaneR_elements)[0]))},
273 STATEVAR(gl_ObjectPlaneQ){"gl_ObjectPlaneQ", gl_ObjectPlaneQ_elements, (sizeof(gl_ObjectPlaneQ_elements
) / sizeof((gl_ObjectPlaneQ_elements)[0]))},
274 STATEVAR(gl_Fog){"gl_Fog", gl_Fog_elements, (sizeof(gl_Fog_elements) / sizeof
((gl_Fog_elements)[0]))},
275
276 STATEVAR(gl_ModelViewMatrix){"gl_ModelViewMatrix", gl_ModelViewMatrix_elements, (sizeof(gl_ModelViewMatrix_elements
) / sizeof((gl_ModelViewMatrix_elements)[0]))},
277 STATEVAR(gl_ModelViewMatrixInverse){"gl_ModelViewMatrixInverse", gl_ModelViewMatrixInverse_elements
, (sizeof(gl_ModelViewMatrixInverse_elements) / sizeof((gl_ModelViewMatrixInverse_elements
)[0]))},
278 STATEVAR(gl_ModelViewMatrixTranspose){"gl_ModelViewMatrixTranspose", gl_ModelViewMatrixTranspose_elements
, (sizeof(gl_ModelViewMatrixTranspose_elements) / sizeof((gl_ModelViewMatrixTranspose_elements
)[0]))},
279 STATEVAR(gl_ModelViewMatrixInverseTranspose){"gl_ModelViewMatrixInverseTranspose", gl_ModelViewMatrixInverseTranspose_elements
, (sizeof(gl_ModelViewMatrixInverseTranspose_elements) / sizeof
((gl_ModelViewMatrixInverseTranspose_elements)[0]))},
280
281 STATEVAR(gl_ProjectionMatrix){"gl_ProjectionMatrix", gl_ProjectionMatrix_elements, (sizeof
(gl_ProjectionMatrix_elements) / sizeof((gl_ProjectionMatrix_elements
)[0]))},
282 STATEVAR(gl_ProjectionMatrixInverse){"gl_ProjectionMatrixInverse", gl_ProjectionMatrixInverse_elements
, (sizeof(gl_ProjectionMatrixInverse_elements) / sizeof((gl_ProjectionMatrixInverse_elements
)[0]))},
283 STATEVAR(gl_ProjectionMatrixTranspose){"gl_ProjectionMatrixTranspose", gl_ProjectionMatrixTranspose_elements
, (sizeof(gl_ProjectionMatrixTranspose_elements) / sizeof((gl_ProjectionMatrixTranspose_elements
)[0]))},
284 STATEVAR(gl_ProjectionMatrixInverseTranspose){"gl_ProjectionMatrixInverseTranspose", gl_ProjectionMatrixInverseTranspose_elements
, (sizeof(gl_ProjectionMatrixInverseTranspose_elements) / sizeof
((gl_ProjectionMatrixInverseTranspose_elements)[0]))},
285
286 STATEVAR(gl_ModelViewProjectionMatrix){"gl_ModelViewProjectionMatrix", gl_ModelViewProjectionMatrix_elements
, (sizeof(gl_ModelViewProjectionMatrix_elements) / sizeof((gl_ModelViewProjectionMatrix_elements
)[0]))},
287 STATEVAR(gl_ModelViewProjectionMatrixInverse){"gl_ModelViewProjectionMatrixInverse", gl_ModelViewProjectionMatrixInverse_elements
, (sizeof(gl_ModelViewProjectionMatrixInverse_elements) / sizeof
((gl_ModelViewProjectionMatrixInverse_elements)[0]))},
288 STATEVAR(gl_ModelViewProjectionMatrixTranspose){"gl_ModelViewProjectionMatrixTranspose", gl_ModelViewProjectionMatrixTranspose_elements
, (sizeof(gl_ModelViewProjectionMatrixTranspose_elements) / sizeof
((gl_ModelViewProjectionMatrixTranspose_elements)[0]))},
289 STATEVAR(gl_ModelViewProjectionMatrixInverseTranspose){"gl_ModelViewProjectionMatrixInverseTranspose", gl_ModelViewProjectionMatrixInverseTranspose_elements
, (sizeof(gl_ModelViewProjectionMatrixInverseTranspose_elements
) / sizeof((gl_ModelViewProjectionMatrixInverseTranspose_elements
)[0]))},
290
291 STATEVAR(gl_TextureMatrix){"gl_TextureMatrix", gl_TextureMatrix_elements, (sizeof(gl_TextureMatrix_elements
) / sizeof((gl_TextureMatrix_elements)[0]))},
292 STATEVAR(gl_TextureMatrixInverse){"gl_TextureMatrixInverse", gl_TextureMatrixInverse_elements,
(sizeof(gl_TextureMatrixInverse_elements) / sizeof((gl_TextureMatrixInverse_elements
)[0]))},
293 STATEVAR(gl_TextureMatrixTranspose){"gl_TextureMatrixTranspose", gl_TextureMatrixTranspose_elements
, (sizeof(gl_TextureMatrixTranspose_elements) / sizeof((gl_TextureMatrixTranspose_elements
)[0]))},
294 STATEVAR(gl_TextureMatrixInverseTranspose){"gl_TextureMatrixInverseTranspose", gl_TextureMatrixInverseTranspose_elements
, (sizeof(gl_TextureMatrixInverseTranspose_elements) / sizeof
((gl_TextureMatrixInverseTranspose_elements)[0]))},
295
296 STATEVAR(gl_NormalMatrix){"gl_NormalMatrix", gl_NormalMatrix_elements, (sizeof(gl_NormalMatrix_elements
) / sizeof((gl_NormalMatrix_elements)[0]))},
297 STATEVAR(gl_NormalScale){"gl_NormalScale", gl_NormalScale_elements, (sizeof(gl_NormalScale_elements
) / sizeof((gl_NormalScale_elements)[0]))},
298
299 STATEVAR(gl_FogParamsOptimizedMESA){"gl_FogParamsOptimizedMESA", gl_FogParamsOptimizedMESA_elements
, (sizeof(gl_FogParamsOptimizedMESA_elements) / sizeof((gl_FogParamsOptimizedMESA_elements
)[0]))},
300 STATEVAR(gl_CurrentAttribVertMESA){"gl_CurrentAttribVertMESA", gl_CurrentAttribVertMESA_elements
, (sizeof(gl_CurrentAttribVertMESA_elements) / sizeof((gl_CurrentAttribVertMESA_elements
)[0]))},
301 STATEVAR(gl_CurrentAttribFragMESA){"gl_CurrentAttribFragMESA", gl_CurrentAttribFragMESA_elements
, (sizeof(gl_CurrentAttribFragMESA_elements) / sizeof((gl_CurrentAttribFragMESA_elements
)[0]))},
302
303 {NULL__null, NULL__null, 0}
304};
305
306
307namespace {
308
309/**
310 * Data structure that accumulates fields for the gl_PerVertex interface
311 * block.
312 */
313class per_vertex_accumulator
314{
315public:
316 per_vertex_accumulator();
317 void add_field(int slot, const glsl_type *type, int precision,
318 const char *name);
319 const glsl_type *construct_interface_instance() const;
320
321private:
322 glsl_struct_field fields[11];
323 unsigned num_fields;
324};
325
326
327per_vertex_accumulator::per_vertex_accumulator()
328 : fields(),
329 num_fields(0)
330{
331}
332
333
334void
335per_vertex_accumulator::add_field(int slot, const glsl_type *type,
336 int precision, const char *name)
337{
338 assert(this->num_fields < ARRAY_SIZE(this->fields))(static_cast <bool> (this->num_fields < (sizeof(this
->fields) / sizeof((this->fields)[0]))) ? void (0) : __assert_fail
("this->num_fields < ARRAY_SIZE(this->fields)", __builtin_FILE
(), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__));
339 this->fields[this->num_fields].type = type;
340 this->fields[this->num_fields].name = name;
341 this->fields[this->num_fields].matrix_layout = GLSL_MATRIX_LAYOUT_INHERITED;
342 this->fields[this->num_fields].location = slot;
343 this->fields[this->num_fields].offset = -1;
344 this->fields[this->num_fields].interpolation = INTERP_MODE_NONE;
345 this->fields[this->num_fields].centroid = 0;
346 this->fields[this->num_fields].sample = 0;
347 this->fields[this->num_fields].patch = 0;
348 this->fields[this->num_fields].precision = precision;
349 this->fields[this->num_fields].memory_read_only = 0;
350 this->fields[this->num_fields].memory_write_only = 0;
351 this->fields[this->num_fields].memory_coherent = 0;
352 this->fields[this->num_fields].memory_volatile = 0;
353 this->fields[this->num_fields].memory_restrict = 0;
354 this->fields[this->num_fields].image_format = PIPE_FORMAT_NONE;
355 this->fields[this->num_fields].explicit_xfb_buffer = 0;
356 this->fields[this->num_fields].xfb_buffer = -1;
357 this->fields[this->num_fields].xfb_stride = -1;
358 this->num_fields++;
359}
360
361
362const glsl_type *
363per_vertex_accumulator::construct_interface_instance() const
364{
365 return glsl_type::get_interface_instance(this->fields, this->num_fields,
366 GLSL_INTERFACE_PACKING_STD140,
367 false,
368 "gl_PerVertex");
369}
370
371
372class builtin_variable_generator
373{
374public:
375 builtin_variable_generator(exec_list *instructions,
376 struct _mesa_glsl_parse_state *state);
377 void generate_constants();
378 void generate_uniforms();
379 void generate_special_vars();
380 void generate_vs_special_vars();
381 void generate_tcs_special_vars();
382 void generate_tes_special_vars();
383 void generate_gs_special_vars();
384 void generate_fs_special_vars();
385 void generate_cs_special_vars();
386 void generate_varyings();
387
388private:
389 const glsl_type *array(const glsl_type *base, unsigned elements)
390 {
391 return glsl_type::get_array_instance(base, elements);
392 }
393
394 const glsl_type *type(const char *name)
395 {
396 return symtab->get_type(name);
397 }
398
399 ir_variable *add_input(int slot, const glsl_type *type, int precision,
400 const char *name)
401 {
402 return add_variable(name, type, precision, ir_var_shader_in, slot);
403 }
404
405 ir_variable *add_input(int slot, const glsl_type *type, const char *name)
406 {
407 return add_input(slot, type, GLSL_PRECISION_NONE, name);
408 }
409
410 ir_variable *add_output(int slot, const glsl_type *type, int precision,
411 const char *name)
412 {
413 return add_variable(name, type, precision, ir_var_shader_out, slot);
414 }
415
416 ir_variable *add_output(int slot, const glsl_type *type, const char *name)
417 {
418 return add_output(slot, type, GLSL_PRECISION_NONE, name);
419 }
420
421 ir_variable *add_index_output(int slot, int index, const glsl_type *type,
422 int precision, const char *name)
423 {
424 return add_index_variable(name, type, precision, ir_var_shader_out, slot,
425 index);
426 }
427
428 ir_variable *add_system_value(int slot, const glsl_type *type, int precision,
429 const char *name)
430 {
431 return add_variable(name, type, precision, ir_var_system_value, slot);
432 }
433 ir_variable *add_system_value(int slot, const glsl_type *type,
434 const char *name)
435 {
436 return add_system_value(slot, type, GLSL_PRECISION_NONE, name);
437 }
438
439 ir_variable *add_variable(const char *name, const glsl_type *type,
440 int precision, enum ir_variable_mode mode,
441 int slot);
442 ir_variable *add_index_variable(const char *name, const glsl_type *type,
443 int precision, enum ir_variable_mode mode,
444 int slot, int index);
445 ir_variable *add_uniform(const glsl_type *type, int precision,
446 const char *name);
447 ir_variable *add_uniform(const glsl_type *type, const char *name)
448 {
449 return add_uniform(type, GLSL_PRECISION_NONE, name);
450 }
451 ir_variable *add_const(const char *name, int precision, int value);
452 ir_variable *add_const(const char *name, int value)
453 {
454 return add_const(name, GLSL_PRECISION_MEDIUM, value);
455 }
456 ir_variable *add_const_ivec3(const char *name, int x, int y, int z);
457 void add_varying(int slot, const glsl_type *type, int precision,
458 const char *name);
459 void add_varying(int slot, const glsl_type *type, const char *name)
460 {
461 add_varying(slot, type, GLSL_PRECISION_NONE, name);
462 }
463
464 exec_list * const instructions;
465 struct _mesa_glsl_parse_state * const state;
466 glsl_symbol_table * const symtab;
467
468 /**
469 * True if compatibility-profile-only variables should be included. (In
470 * desktop GL, these are always included when the GLSL version is 1.30 and
471 * or below).
472 */
473 const bool compatibility;
474
475 const glsl_type * const bool_t;
476 const glsl_type * const int_t;
477 const glsl_type * const uint_t;
478 const glsl_type * const uint64_t;
479 const glsl_type * const float_t;
480 const glsl_type * const vec2_t;
481 const glsl_type * const vec3_t;
482 const glsl_type * const vec4_t;
483 const glsl_type * const uvec3_t;
484 const glsl_type * const mat3_t;
485 const glsl_type * const mat4_t;
486
487 per_vertex_accumulator per_vertex_in;
488 per_vertex_accumulator per_vertex_out;
489};
490
491
492builtin_variable_generator::builtin_variable_generator(
493 exec_list *instructions, struct _mesa_glsl_parse_state *state)
494 : instructions(instructions), state(state), symtab(state->symbols),
495 compatibility(state->compat_shader || state->ARB_compatibility_enable),
496 bool_t(glsl_type::bool_type), int_t(glsl_type::int_type),
497 uint_t(glsl_type::uint_type),
498 uint64_t(glsl_type::uint64_t_type),
499 float_t(glsl_type::float_type), vec2_t(glsl_type::vec2_type),
500 vec3_t(glsl_type::vec3_type), vec4_t(glsl_type::vec4_type),
501 uvec3_t(glsl_type::uvec3_type),
502 mat3_t(glsl_type::mat3_type), mat4_t(glsl_type::mat4_type)
503{
504}
505
506ir_variable *
507builtin_variable_generator::add_index_variable(const char *name,
508 const glsl_type *type,
509 int precision,
510 enum ir_variable_mode mode,
511 int slot, int index)
512{
513 ir_variable *var = new(symtab) ir_variable(type, name, mode);
514 var->data.how_declared = ir_var_declared_implicitly;
515
516 switch (var->data.mode) {
517 case ir_var_auto:
518 case ir_var_shader_in:
519 case ir_var_uniform:
520 case ir_var_system_value:
521 var->data.read_only = true;
522 break;
523 case ir_var_shader_out:
524 case ir_var_shader_storage:
525 break;
526 default:
527 /* The only variables that are added using this function should be
528 * uniforms, shader storage, shader inputs, and shader outputs, constants
529 * (which use ir_var_auto), and system values.
530 */
531 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
));
532 break;
533 }
534
535 var->data.location = slot;
536 var->data.explicit_location = (slot >= 0);
537 var->data.explicit_index = 1;
538 var->data.index = index;
539
540 if (state->es_shader)
541 var->data.precision = precision;
542
543 /* Once the variable is created an initialized, add it to the symbol table
544 * and add the declaration to the IR stream.
545 */
546 instructions->push_tail(var);
547
548 symtab->add_variable(var);
549 return var;
550}
551
552ir_variable *
553builtin_variable_generator::add_variable(const char *name,
554 const glsl_type *type,
555 int precision,
556 enum ir_variable_mode mode, int slot)
557{
558 ir_variable *var = new(symtab) ir_variable(type, name, mode);
559 var->data.how_declared = ir_var_declared_implicitly;
560
561 switch (var->data.mode) {
562 case ir_var_auto:
563 case ir_var_shader_in:
564 case ir_var_uniform:
565 case ir_var_system_value:
566 var->data.read_only = true;
567 break;
568 case ir_var_shader_out:
569 case ir_var_shader_storage:
570 break;
571 default:
572 /* The only variables that are added using this function should be
573 * uniforms, shader storage, shader inputs, and shader outputs, constants
574 * (which use ir_var_auto), and system values.
575 */
576 assert(0)(static_cast <bool> (0) ? void (0) : __assert_fail ("0"
, __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__
));
577 break;
578 }
579
580 var->data.location = slot;
581 var->data.explicit_location = (slot >= 0);
582 var->data.explicit_index = 0;
583
584 if (state->es_shader)
585 var->data.precision = precision;
586
587 /* Once the variable is created an initialized, add it to the symbol table
588 * and add the declaration to the IR stream.
589 */
590 instructions->push_tail(var);
591
592 symtab->add_variable(var);
593 return var;
594}
595
596extern "C" const struct gl_builtin_uniform_desc *
597_mesa_glsl_get_builtin_uniform_desc(const char *name)
598{
599 for (unsigned i = 0; _mesa_builtin_uniform_desc[i].name != NULL__null; i++) {
600 if (strcmp(_mesa_builtin_uniform_desc[i].name, name) == 0) {
601 return &_mesa_builtin_uniform_desc[i];
602 }
603 }
604 return NULL__null;
605}
606
607ir_variable *
608builtin_variable_generator::add_uniform(const glsl_type *type,
609 int precision,
610 const char *name)
611{
612 ir_variable *const uni =
613 add_variable(name, type, precision, ir_var_uniform, -1);
614
615 const struct gl_builtin_uniform_desc* const statevar =
616 _mesa_glsl_get_builtin_uniform_desc(name);
617 assert(statevar != NULL)(static_cast <bool> (statevar != __null) ? void (0) : __assert_fail
("statevar != NULL", __builtin_FILE (), __builtin_LINE (), __extension__
__PRETTY_FUNCTION__));
618
619 const unsigned array_count = type->is_array() ? type->length : 1;
4
←
'?' condition is false
→
620
621 ir_state_slot *slots =
622 uni->allocate_state_slots(array_count * statevar->num_elements);
623
624 for (unsigned a = 0; a < array_count; a++) {
5
←
Loop condition is true. Entering loop body
→
625 for (unsigned j = 0; j < statevar->num_elements; j++) {
6
←
Assuming 'j' is < field 'num_elements'
→
7
←
Loop condition is true. Entering loop body
→
626 const struct gl_builtin_uniform_element *element =
627 &statevar->elements[j];
628
629 memcpy(slots->tokens, element->tokens, sizeof(element->tokens));
8
←
Null pointer passed to 1st parameter expecting 'nonnull'
630 if (type->is_array()) {
631 if (strcmp(name, "gl_CurrentAttribVertMESA") == 0 ||
632 strcmp(name, "gl_CurrentAttribFragMESA") == 0) {
633 slots->tokens[2] = a;
634 } else {
635 slots->tokens[1] = a;
636 }
637 }
638
639 slots->swizzle = element->swizzle;
640 slots++;
641 }
642 }
643
644 return uni;
645}
646
647
648ir_variable *
649builtin_variable_generator::add_const(const char *name, int precision,
650 int value)
651{
652 ir_variable *const var = add_variable(name, glsl_type::int_type,
653 precision, ir_var_auto, -1);
654 var->constant_value = new(var) ir_constant(value);
655 var->constant_initializer = new(var) ir_constant(value);
656 var->data.has_initializer = true;
657 return var;
658}
659
660
661ir_variable *
662builtin_variable_generator::add_const_ivec3(const char *name, int x, int y,
663 int z)
664{
665 ir_variable *const var = add_variable(name, glsl_type::ivec3_type,
666 GLSL_PRECISION_HIGH,
667 ir_var_auto, -1);
668 ir_constant_data data;
669 memset(&data, 0, sizeof(data));
670 data.i[0] = x;
671 data.i[1] = y;
672 data.i[2] = z;
673 var->constant_value = new(var) ir_constant(glsl_type::ivec3_type, &data);
674 var->constant_initializer =
675 new(var) ir_constant(glsl_type::ivec3_type, &data);
676 var->data.has_initializer = true;
677 return var;
678}
679
680
681void
682builtin_variable_generator::generate_constants()
683{
684 add_const("gl_MaxVertexAttribs", state->Const.MaxVertexAttribs);
685 add_const("gl_MaxVertexTextureImageUnits",
686 state->Const.MaxVertexTextureImageUnits);
687 add_const("gl_MaxCombinedTextureImageUnits",
688 state->Const.MaxCombinedTextureImageUnits);
689 add_const("gl_MaxTextureImageUnits", state->Const.MaxTextureImageUnits);
690 add_const("gl_MaxDrawBuffers", state->Const.MaxDrawBuffers);
691
692 /* Max uniforms/varyings: GLSL ES counts these in units of vectors; desktop
693 * GL counts them in units of "components" or "floats" and also in units
694 * of vectors since GL 4.1
695 */
696 if (!state->es_shader) {
697 add_const("gl_MaxFragmentUniformComponents",
698 state->Const.MaxFragmentUniformComponents);
699 add_const("gl_MaxVertexUniformComponents",
700 state->Const.MaxVertexUniformComponents);
701 }
702
703 if (state->is_version(410, 100)) {
704 add_const("gl_MaxVertexUniformVectors",
705 state->Const.MaxVertexUniformComponents / 4);
706 add_const("gl_MaxFragmentUniformVectors",
707 state->Const.MaxFragmentUniformComponents / 4);
708
709 /* In GLSL ES 3.00, gl_MaxVaryingVectors was split out to separate
710 * vertex and fragment shader constants.
711 */
712 if (state->is_version(0, 300)) {
713 add_const("gl_MaxVertexOutputVectors",
714 state->ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents / 4);
715 add_const("gl_MaxFragmentInputVectors",
716 state->ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents / 4);
717 } else {
718 add_const("gl_MaxVaryingVectors",
719 state->ctx->Const.MaxVarying);
720 }
721
722 /* EXT_blend_func_extended brings a built in constant
723 * for determining number of dual source draw buffers
724 */
725 if (state->EXT_blend_func_extended_enable) {
726 add_const("gl_MaxDualSourceDrawBuffersEXT",
727 state->Const.MaxDualSourceDrawBuffers);
728 }
729 } else {
730 /* Note: gl_MaxVaryingFloats was deprecated in GLSL 1.30+, but not
731 * removed
732 */
733 add_const("gl_MaxVaryingFloats", state->ctx->Const.MaxVarying * 4);
734 }
735
736 /* Texel offsets were introduced in ARB_shading_language_420pack (which
737 * requires desktop GLSL version 130), and adopted into desktop GLSL
738 * version 4.20 and GLSL ES version 3.00.
739 */
740 if ((state->is_version(130, 0) &&
741 state->ARB_shading_language_420pack_enable) ||
742 state->is_version(420, 300)) {
743 add_const("gl_MinProgramTexelOffset",
744 state->Const.MinProgramTexelOffset);
745 add_const("gl_MaxProgramTexelOffset",
746 state->Const.MaxProgramTexelOffset);
747 }
748
749 if (state->has_clip_distance()) {
750 add_const("gl_MaxClipDistances", state->Const.MaxClipPlanes);
751 }
752 if (state->is_version(130, 0)) {
753 add_const("gl_MaxVaryingComponents", state->ctx->Const.MaxVarying * 4);
754 }
755 if (state->has_cull_distance()) {
756 add_const("gl_MaxCullDistances", state->Const.MaxClipPlanes);
757 add_const("gl_MaxCombinedClipAndCullDistances",
758 state->Const.MaxClipPlanes);
759 }
760
761 if (state->has_geometry_shader()) {
762 add_const("gl_MaxVertexOutputComponents",
763 state->Const.MaxVertexOutputComponents);
764 add_const("gl_MaxGeometryInputComponents",
765 state->Const.MaxGeometryInputComponents);
766 add_const("gl_MaxGeometryOutputComponents",
767 state->Const.MaxGeometryOutputComponents);
768 add_const("gl_MaxFragmentInputComponents",
769 state->Const.MaxFragmentInputComponents);
770 add_const("gl_MaxGeometryTextureImageUnits",
771 state->Const.MaxGeometryTextureImageUnits);
772 add_const("gl_MaxGeometryOutputVertices",
773 state->Const.MaxGeometryOutputVertices);
774 add_const("gl_MaxGeometryTotalOutputComponents",
775 state->Const.MaxGeometryTotalOutputComponents);
776 add_const("gl_MaxGeometryUniformComponents",
777 state->Const.MaxGeometryUniformComponents);
778
779 /* Note: the GLSL 1.50-4.40 specs require
780 * gl_MaxGeometryVaryingComponents to be present, and to be at least 64.
781 * But they do not define what it means (and there does not appear to be
782 * any corresponding constant in the GL specs). However,
783 * ARB_geometry_shader4 defines MAX_GEOMETRY_VARYING_COMPONENTS_ARB to
784 * be the maximum number of components available for use as geometry
785 * outputs. So we assume this is a synonym for
786 * gl_MaxGeometryOutputComponents.
787 */
788 add_const("gl_MaxGeometryVaryingComponents",
789 state->Const.MaxGeometryOutputComponents);
790 }
791
792 if (compatibility) {
793 /* Note: gl_MaxLights stopped being listed as an explicit constant in
794 * GLSL 1.30, however it continues to be referred to (as a minimum size
795 * for compatibility-mode uniforms) all the way up through GLSL 4.30, so
796 * this seems like it was probably an oversight.
797 */
798 add_const("gl_MaxLights", state->Const.MaxLights);
799
800 add_const("gl_MaxClipPlanes", state->Const.MaxClipPlanes);
801
802 /* Note: gl_MaxTextureUnits wasn't made compatibility-only until GLSL
803 * 1.50, however this seems like it was probably an oversight.
804 */
805 add_const("gl_MaxTextureUnits", state->Const.MaxTextureUnits);
806
807 /* Note: gl_MaxTextureCoords was left out of GLSL 1.40, but it was
808 * re-introduced in GLSL 1.50, so this seems like it was probably an
809 * oversight.
810 */
811 add_const("gl_MaxTextureCoords", state->Const.MaxTextureCoords);
812 }
813
814 if (state->has_atomic_counters()) {
815 add_const("gl_MaxVertexAtomicCounters",
816 state->Const.MaxVertexAtomicCounters);
817 add_const("gl_MaxFragmentAtomicCounters",
818 state->Const.MaxFragmentAtomicCounters);
819 add_const("gl_MaxCombinedAtomicCounters",
820 state->Const.MaxCombinedAtomicCounters);
821 add_const("gl_MaxAtomicCounterBindings",
822 state->Const.MaxAtomicBufferBindings);
823
824 if (state->has_geometry_shader()) {
825 add_const("gl_MaxGeometryAtomicCounters",
826 state->Const.MaxGeometryAtomicCounters);
827 }
828 if (state->is_version(110, 320)) {
829 add_const("gl_MaxTessControlAtomicCounters",
830 state->Const.MaxTessControlAtomicCounters);
831 add_const("gl_MaxTessEvaluationAtomicCounters",
832 state->Const.MaxTessEvaluationAtomicCounters);
833 }
834 }
835
836 if (state->is_version(420, 310)) {
837 add_const("gl_MaxVertexAtomicCounterBuffers",
838 state->Const.MaxVertexAtomicCounterBuffers);
839 add_const("gl_MaxFragmentAtomicCounterBuffers",
840 state->Const.MaxFragmentAtomicCounterBuffers);
841 add_const("gl_MaxCombinedAtomicCounterBuffers",
842 state->Const.MaxCombinedAtomicCounterBuffers);
843 add_const("gl_MaxAtomicCounterBufferSize",
844 state->Const.MaxAtomicCounterBufferSize);
845
846 if (state->has_geometry_shader()) {
847 add_const("gl_MaxGeometryAtomicCounterBuffers",
848 state->Const.MaxGeometryAtomicCounterBuffers);
849 }
850 if (state->is_version(110, 320)) {
851 add_const("gl_MaxTessControlAtomicCounterBuffers",
852 state->Const.MaxTessControlAtomicCounterBuffers);
853 add_const("gl_MaxTessEvaluationAtomicCounterBuffers",
854 state->Const.MaxTessEvaluationAtomicCounterBuffers);
855 }
856 }
857
858 if (state->is_version(430, 310) || state->ARB_compute_shader_enable) {
859 add_const("gl_MaxComputeAtomicCounterBuffers",
860 state->Const.MaxComputeAtomicCounterBuffers);
861 add_const("gl_MaxComputeAtomicCounters",
862 state->Const.MaxComputeAtomicCounters);
863 add_const("gl_MaxComputeImageUniforms",
864 state->Const.MaxComputeImageUniforms);
865 add_const("gl_MaxComputeTextureImageUnits",
866 state->Const.MaxComputeTextureImageUnits);
867 add_const("gl_MaxComputeUniformComponents",
868 state->Const.MaxComputeUniformComponents);
869
870 add_const_ivec3("gl_MaxComputeWorkGroupCount",
871 state->Const.MaxComputeWorkGroupCount[0],
872 state->Const.MaxComputeWorkGroupCount[1],
873 state->Const.MaxComputeWorkGroupCount[2]);
874 add_const_ivec3("gl_MaxComputeWorkGroupSize",
875 state->Const.MaxComputeWorkGroupSize[0],
876 state->Const.MaxComputeWorkGroupSize[1],
877 state->Const.MaxComputeWorkGroupSize[2]);
878
879 /* From the GLSL 4.40 spec, section 7.1 (Built-In Language Variables):
880 *
881 * The built-in constant gl_WorkGroupSize is a compute-shader
882 * constant containing the local work-group size of the shader. The
883 * size of the work group in the X, Y, and Z dimensions is stored in
884 * the x, y, and z components. The constants values in
885 * gl_WorkGroupSize will match those specified in the required
886 * local_size_x, local_size_y, and local_size_z layout qualifiers
887 * for the current shader. This is a constant so that it can be
888 * used to size arrays of memory that can be shared within the local
889 * work group. It is a compile-time error to use gl_WorkGroupSize
890 * in a shader that does not declare a fixed local group size, or
891 * before that shader has declared a fixed local group size, using
892 * local_size_x, local_size_y, and local_size_z.
893 *
894 * To prevent the shader from trying to refer to gl_WorkGroupSize before
895 * the layout declaration, we don't define it here. Intead we define it
896 * in ast_cs_input_layout::hir().
897 */
898 }
899
900 if (state->has_enhanced_layouts()) {
901 add_const("gl_MaxTransformFeedbackBuffers",
902 state->Const.MaxTransformFeedbackBuffers);
903 add_const("gl_MaxTransformFeedbackInterleavedComponents",
904 state->Const.MaxTransformFeedbackInterleavedComponents);
905 }
906
907 if (state->has_shader_image_load_store()) {
908 add_const("gl_MaxImageUnits",
909 state->Const.MaxImageUnits);
910 add_const("gl_MaxVertexImageUniforms",
911 state->Const.MaxVertexImageUniforms);
912 add_const("gl_MaxFragmentImageUniforms",
913 state->Const.MaxFragmentImageUniforms);
914 add_const("gl_MaxCombinedImageUniforms",
915 state->Const.MaxCombinedImageUniforms);
916
917 if (state->has_geometry_shader()) {
918 add_const("gl_MaxGeometryImageUniforms",
919 state->Const.MaxGeometryImageUniforms);
920 }
921
922 if (!state->es_shader) {
923 add_const("gl_MaxCombinedImageUnitsAndFragmentOutputs",
924 state->Const.MaxCombinedShaderOutputResources);
925 add_const("gl_MaxImageSamples",
926 state->Const.MaxImageSamples);
927 }
928
929 if (state->has_tessellation_shader()) {
930 add_const("gl_MaxTessControlImageUniforms",
931 state->Const.MaxTessControlImageUniforms);
932 add_const("gl_MaxTessEvaluationImageUniforms",
933 state->Const.MaxTessEvaluationImageUniforms);
934 }
935 }
936
937 if (state->is_version(440, 310) ||
938 state->ARB_ES3_1_compatibility_enable) {
939 add_const("gl_MaxCombinedShaderOutputResources",
940 state->Const.MaxCombinedShaderOutputResources);
941 }
942
943 if (state->is_version(410, 0) ||
944 state->ARB_viewport_array_enable ||
945 state->OES_viewport_array_enable) {
946 add_const("gl_MaxViewports", GLSL_PRECISION_HIGH,
947 state->Const.MaxViewports);
948 }
949
950 if (state->has_tessellation_shader()) {
951 add_const("gl_MaxPatchVertices", state->Const.MaxPatchVertices);
952 add_const("gl_MaxTessGenLevel", state->Const.MaxTessGenLevel);
953 add_const("gl_MaxTessControlInputComponents", state->Const.MaxTessControlInputComponents);
954 add_const("gl_MaxTessControlOutputComponents", state->Const.MaxTessControlOutputComponents);
955 add_const("gl_MaxTessControlTextureImageUnits", state->Const.MaxTessControlTextureImageUnits);
956 add_const("gl_MaxTessEvaluationInputComponents", state->Const.MaxTessEvaluationInputComponents);
957 add_const("gl_MaxTessEvaluationOutputComponents", state->Const.MaxTessEvaluationOutputComponents);
958 add_const("gl_MaxTessEvaluationTextureImageUnits", state->Const.MaxTessEvaluationTextureImageUnits);
959 add_const("gl_MaxTessPatchComponents", state->Const.MaxTessPatchComponents);
960 add_const("gl_MaxTessControlTotalOutputComponents", state->Const.MaxTessControlTotalOutputComponents);
961 add_const("gl_MaxTessControlUniformComponents", state->Const.MaxTessControlUniformComponents);
962 add_const("gl_MaxTessEvaluationUniformComponents", state->Const.MaxTessEvaluationUniformComponents);
963 }
964
965 if (state->is_version(450, 320) ||
966 state->OES_sample_variables_enable ||
967 state->ARB_ES3_1_compatibility_enable)
968 add_const("gl_MaxSamples", state->Const.MaxSamples);
969}
970
971
972/**
973 * Generate uniform variables (which exist in all types of shaders).
974 */
975void
976builtin_variable_generator::generate_uniforms()
977{
978 if (state->is_version(400, 320) ||
979 state->ARB_sample_shading_enable ||
2
←
Assuming field 'ARB_sample_shading_enable' is true
→
980 state->OES_sample_variables_enable)
981 add_uniform(int_t, GLSL_PRECISION_LOW, "gl_NumSamples");
3
←
Calling 'builtin_variable_generator::add_uniform'
→
982 add_uniform(type("gl_DepthRangeParameters"), "gl_DepthRange");
983 add_uniform(array(vec4_t, VERT_ATTRIB_MAX), "gl_CurrentAttribVertMESA");
984 add_uniform(array(vec4_t, VARYING_SLOT_MAX(VARYING_SLOT_VAR0 + 32)), "gl_CurrentAttribFragMESA");
985
986 if (compatibility) {
987 add_uniform(mat4_t, "gl_ModelViewMatrix");
988 add_uniform(mat4_t, "gl_ProjectionMatrix");
989 add_uniform(mat4_t, "gl_ModelViewProjectionMatrix");
990 add_uniform(mat3_t, "gl_NormalMatrix");
991 add_uniform(mat4_t, "gl_ModelViewMatrixInverse");
992 add_uniform(mat4_t, "gl_ProjectionMatrixInverse");
993 add_uniform(mat4_t, "gl_ModelViewProjectionMatrixInverse");
994 add_uniform(mat4_t, "gl_ModelViewMatrixTranspose");
995 add_uniform(mat4_t, "gl_ProjectionMatrixTranspose");
996 add_uniform(mat4_t, "gl_ModelViewProjectionMatrixTranspose");
997 add_uniform(mat4_t, "gl_ModelViewMatrixInverseTranspose");
998 add_uniform(mat4_t, "gl_ProjectionMatrixInverseTranspose");
999 add_uniform(mat4_t, "gl_ModelViewProjectionMatrixInverseTranspose");
1000 add_uniform(float_t, "gl_NormalScale");
1001 add_uniform(type("gl_LightModelParameters"), "gl_LightModel");
1002 add_uniform(vec4_t, "gl_FogParamsOptimizedMESA");
1003
1004 const glsl_type *const mat4_array_type =
1005 array(mat4_t, state->Const.MaxTextureCoords);
1006 add_uniform(mat4_array_type, "gl_TextureMatrix");
1007 add_uniform(mat4_array_type, "gl_TextureMatrixInverse");
1008 add_uniform(mat4_array_type, "gl_TextureMatrixTranspose");
1009 add_uniform(mat4_array_type, "gl_TextureMatrixInverseTranspose");
1010
1011 add_uniform(array(vec4_t, state->Const.MaxClipPlanes), "gl_ClipPlane");
1012 add_uniform(type("gl_PointParameters"), "gl_Point");
1013
1014 const glsl_type *const material_parameters_type =
1015 type("gl_MaterialParameters");
1016 add_uniform(material_parameters_type, "gl_FrontMaterial");
1017 add_uniform(material_parameters_type, "gl_BackMaterial");
1018
1019 add_uniform(array(type("gl_LightSourceParameters"),
1020 state->Const.MaxLights),
1021 "gl_LightSource");
1022
1023 const glsl_type *const light_model_products_type =
1024 type("gl_LightModelProducts");
1025 add_uniform(light_model_products_type, "gl_FrontLightModelProduct");
1026 add_uniform(light_model_products_type, "gl_BackLightModelProduct");
1027
1028 const glsl_type *const light_products_type =
1029 array(type("gl_LightProducts"), state->Const.MaxLights);
1030 add_uniform(light_products_type, "gl_FrontLightProduct");
1031 add_uniform(light_products_type, "gl_BackLightProduct");
1032
1033 add_uniform(array(vec4_t, state->Const.MaxTextureUnits),
1034 "gl_TextureEnvColor");
1035
1036 const glsl_type *const texcoords_vec4 =
1037 array(vec4_t, state->Const.MaxTextureCoords);
1038 add_uniform(texcoords_vec4, "gl_EyePlaneS");
1039 add_uniform(texcoords_vec4, "gl_EyePlaneT");
1040 add_uniform(texcoords_vec4, "gl_EyePlaneR");
1041 add_uniform(texcoords_vec4, "gl_EyePlaneQ");
1042 add_uniform(texcoords_vec4, "gl_ObjectPlaneS");
1043 add_uniform(texcoords_vec4, "gl_ObjectPlaneT");
1044 add_uniform(texcoords_vec4, "gl_ObjectPlaneR");
1045 add_uniform(texcoords_vec4, "gl_ObjectPlaneQ");
1046
1047 add_uniform(type("gl_FogParameters"), "gl_Fog");
1048 }
1049}
1050
1051
1052/**
1053 * Generate special variables which exist in all shaders.
1054 */
1055void
1056builtin_variable_generator::generate_special_vars()
1057{
1058 if (state->ARB_shader_ballot_enable) {
1059 add_system_value(SYSTEM_VALUE_SUBGROUP_SIZE, uint_t, "gl_SubGroupSizeARB");
1060 add_system_value(SYSTEM_VALUE_SUBGROUP_INVOCATION, uint_t, "gl_SubGroupInvocationARB");
1061 add_system_value(SYSTEM_VALUE_SUBGROUP_EQ_MASK, uint64_t, "gl_SubGroupEqMaskARB");
1062 add_system_value(SYSTEM_VALUE_SUBGROUP_GE_MASK, uint64_t, "gl_SubGroupGeMaskARB");
1063 add_system_value(SYSTEM_VALUE_SUBGROUP_GT_MASK, uint64_t, "gl_SubGroupGtMaskARB");
1064 add_system_value(SYSTEM_VALUE_SUBGROUP_LE_MASK, uint64_t, "gl_SubGroupLeMaskARB");
1065 add_system_value(SYSTEM_VALUE_SUBGROUP_LT_MASK, uint64_t, "gl_SubGroupLtMaskARB");
1066 }
1067}
1068
1069
1070/**
1071 * Generate variables which only exist in vertex shaders.
1072 */
1073void
1074builtin_variable_generator::generate_vs_special_vars()
1075{
1076 ir_variable *var;
1077
1078 if (state->is_version(130, 300) || state->EXT_gpu_shader4_enable) {
1079 add_system_value(SYSTEM_VALUE_VERTEX_ID, int_t, GLSL_PRECISION_HIGH,
1080 "gl_VertexID");
1081 }
1082 if (state->is_version(460, 0)) {
1083 add_system_value(SYSTEM_VALUE_BASE_VERTEX, int_t, "gl_BaseVertex");
1084 add_system_value(SYSTEM_VALUE_BASE_INSTANCE, int_t, "gl_BaseInstance");
1085 add_system_value(SYSTEM_VALUE_DRAW_ID, int_t, "gl_DrawID");
1086 }
1087 if (state->EXT_draw_instanced_enable && state->is_version(0, 100))
1088 add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, GLSL_PRECISION_HIGH,
1089 "gl_InstanceIDEXT");
1090
1091 if (state->ARB_draw_instanced_enable)
1092 add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, "gl_InstanceIDARB");
1093
1094 if (state->ARB_draw_instanced_enable || state->is_version(140, 300) ||
1095 state->EXT_gpu_shader4_enable) {
1096 add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, GLSL_PRECISION_HIGH,
1097 "gl_InstanceID");
1098 }
1099 if (state->ARB_shader_draw_parameters_enable) {
1100 add_system_value(SYSTEM_VALUE_BASE_VERTEX, int_t, "gl_BaseVertexARB");
1101 add_system_value(SYSTEM_VALUE_BASE_INSTANCE, int_t, "gl_BaseInstanceARB");
1102 add_system_value(SYSTEM_VALUE_DRAW_ID, int_t, "gl_DrawIDARB");
1103 }
1104 if (state->AMD_vertex_shader_layer_enable ||
1105 state->ARB_shader_viewport_layer_array_enable ||
1106 state->NV_viewport_array2_enable) {
1107 var = add_output(VARYING_SLOT_LAYER, int_t, "gl_Layer");
1108 var->data.interpolation = INTERP_MODE_FLAT;
1109 }
1110 if (state->AMD_vertex_shader_viewport_index_enable ||
1111 state->ARB_shader_viewport_layer_array_enable ||
1112 state->NV_viewport_array2_enable) {
1113 var = add_output(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex");
1114 var->data.interpolation = INTERP_MODE_FLAT;
1115 }
1116 if (state->NV_viewport_array2_enable) {
1117 /* From the NV_viewport_array2 specification:
1118 *
1119 * "The variable gl_ViewportMask[] is available as an output variable
1120 * in the VTG languages. The array has ceil(v/32) elements where v is
1121 * the maximum number of viewports supported by the implementation."
1122 *
1123 * Since no drivers expose more than 16 viewports, we can simply set the
1124 * array size to 1 rather than computing it and dealing with varying
1125 * slot complication.
1126 */
1127 var = add_output(VARYING_SLOT_VIEWPORT_MASK, array(int_t, 1),
1128 "gl_ViewportMask");
1129 var->data.interpolation = INTERP_MODE_FLAT;
1130 }
1131 if (compatibility) {
1132 add_input(VERT_ATTRIB_POS, vec4_t, "gl_Vertex");
1133 add_input(VERT_ATTRIB_NORMAL, vec3_t, "gl_Normal");
1134 add_input(VERT_ATTRIB_COLOR0, vec4_t, "gl_Color");
1135 add_input(VERT_ATTRIB_COLOR1, vec4_t, "gl_SecondaryColor");
1136 add_input(VERT_ATTRIB_TEX0, vec4_t, "gl_MultiTexCoord0");
1137 add_input(VERT_ATTRIB_TEX1, vec4_t, "gl_MultiTexCoord1");
1138 add_input(VERT_ATTRIB_TEX2, vec4_t, "gl_MultiTexCoord2");
1139 add_input(VERT_ATTRIB_TEX3, vec4_t, "gl_MultiTexCoord3");
1140 add_input(VERT_ATTRIB_TEX4, vec4_t, "gl_MultiTexCoord4");
1141 add_input(VERT_ATTRIB_TEX5, vec4_t, "gl_MultiTexCoord5");
1142 add_input(VERT_ATTRIB_TEX6, vec4_t, "gl_MultiTexCoord6");
1143 add_input(VERT_ATTRIB_TEX7, vec4_t, "gl_MultiTexCoord7");
1144 add_input(VERT_ATTRIB_FOG, float_t, "gl_FogCoord");
1145 }
1146}
1147
1148
1149/**
1150 * Generate variables which only exist in tessellation control shaders.
1151 */
1152void
1153builtin_variable_generator::generate_tcs_special_vars()
1154{
1155 add_system_value(SYSTEM_VALUE_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
1156 "gl_PrimitiveID");
1157 add_system_value(SYSTEM_VALUE_INVOCATION_ID, int_t, GLSL_PRECISION_HIGH,
1158 "gl_InvocationID");
1159 add_system_value(SYSTEM_VALUE_VERTICES_IN, int_t, GLSL_PRECISION_HIGH,
1160 "gl_PatchVerticesIn");
1161
1162 add_output(VARYING_SLOT_TESS_LEVEL_OUTER, array(float_t, 4),
1163 GLSL_PRECISION_HIGH, "gl_TessLevelOuter")->data.patch = 1;
1164 add_output(VARYING_SLOT_TESS_LEVEL_INNER, array(float_t, 2),
1165 GLSL_PRECISION_HIGH, "gl_TessLevelInner")->data.patch = 1;
1166 /* XXX What to do if multiple are flipped on? */
1167 int bbox_slot = state->ctx->Const.NoPrimitiveBoundingBoxOutput ? -1 :
1168 VARYING_SLOT_BOUNDING_BOX0;
1169 if (state->EXT_primitive_bounding_box_enable)
1170 add_output(bbox_slot, array(vec4_t, 2), "gl_BoundingBoxEXT")
1171 ->data.patch = 1;
1172 if (state->OES_primitive_bounding_box_enable) {
1173 add_output(bbox_slot, array(vec4_t, 2), GLSL_PRECISION_HIGH,
1174 "gl_BoundingBoxOES")->data.patch = 1;
1175 }
1176 if (state->is_version(0, 320) || state->ARB_ES3_2_compatibility_enable) {
1177 add_output(bbox_slot, array(vec4_t, 2), GLSL_PRECISION_HIGH,
1178 "gl_BoundingBox")->data.patch = 1;
1179 }
1180
1181 /* NOTE: These are completely pointless. Writing these will never go
1182 * anywhere. But the specs demands it. So we add them with a slot of -1,
1183 * which makes the data go nowhere.
1184 */
1185 if (state->NV_viewport_array2_enable) {
1186 add_output(-1, int_t, "gl_Layer");
1187 add_output(-1, int_t, "gl_ViewportIndex");
1188 add_output(-1, array(int_t, 1), "gl_ViewportMask");
1189 }
1190
1191}
1192
1193
1194/**
1195 * Generate variables which only exist in tessellation evaluation shaders.
1196 */
1197void
1198builtin_variable_generator::generate_tes_special_vars()
1199{
1200 ir_variable *var;
1201
1202 add_system_value(SYSTEM_VALUE_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
1203 "gl_PrimitiveID");
1204 add_system_value(SYSTEM_VALUE_VERTICES_IN, int_t, GLSL_PRECISION_HIGH,
1205 "gl_PatchVerticesIn");
1206 add_system_value(SYSTEM_VALUE_TESS_COORD, vec3_t, GLSL_PRECISION_HIGH,
1207 "gl_TessCoord");
1208 if (this->state->ctx->Const.GLSLTessLevelsAsInputs) {
1209 add_input(VARYING_SLOT_TESS_LEVEL_OUTER, array(float_t, 4),
1210 GLSL_PRECISION_HIGH, "gl_TessLevelOuter")->data.patch = 1;
1211 add_input(VARYING_SLOT_TESS_LEVEL_INNER, array(float_t, 2),
1212 GLSL_PRECISION_HIGH, "gl_TessLevelInner")->data.patch = 1;
1213 } else {
1214 add_system_value(SYSTEM_VALUE_TESS_LEVEL_OUTER, array(float_t, 4),
1215 GLSL_PRECISION_HIGH, "gl_TessLevelOuter");
1216 add_system_value(SYSTEM_VALUE_TESS_LEVEL_INNER, array(float_t, 2),
1217 GLSL_PRECISION_HIGH, "gl_TessLevelInner");
1218 }
1219 if (state->ARB_shader_viewport_layer_array_enable ||
1220 state->NV_viewport_array2_enable) {
1221 var = add_output(VARYING_SLOT_LAYER, int_t, "gl_Layer");
1222 var->data.interpolation = INTERP_MODE_FLAT;
1223 var = add_output(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex");
1224 var->data.interpolation = INTERP_MODE_FLAT;
1225 }
1226 if (state->NV_viewport_array2_enable) {
1227 var = add_output(VARYING_SLOT_VIEWPORT_MASK, array(int_t, 1),
1228 "gl_ViewportMask");
1229 var->data.interpolation = INTERP_MODE_FLAT;
1230 }
1231}
1232
1233
1234/**
1235 * Generate variables which only exist in geometry shaders.
1236 */
1237void
1238builtin_variable_generator::generate_gs_special_vars()
1239{
1240 ir_variable *var;
1241
1242 var = add_output(VARYING_SLOT_LAYER, int_t, GLSL_PRECISION_HIGH, "gl_Layer");
1243 var->data.interpolation = INTERP_MODE_FLAT;
1244 if (state->is_version(410, 0) || state->ARB_viewport_array_enable ||
1245 state->OES_viewport_array_enable) {
1246 var = add_output(VARYING_SLOT_VIEWPORT, int_t, GLSL_PRECISION_HIGH,
1247 "gl_ViewportIndex");
1248 var->data.interpolation = INTERP_MODE_FLAT;
1249 }
1250 if (state->NV_viewport_array2_enable) {
1251 var = add_output(VARYING_SLOT_VIEWPORT_MASK, array(int_t, 1),
1252 "gl_ViewportMask");
1253 var->data.interpolation = INTERP_MODE_FLAT;
1254 }
1255 if (state->is_version(400, 320) || state->ARB_gpu_shader5_enable ||
1256 state->OES_geometry_shader_enable || state->EXT_geometry_shader_enable) {
1257 add_system_value(SYSTEM_VALUE_INVOCATION_ID, int_t, GLSL_PRECISION_HIGH,
1258 "gl_InvocationID");
1259 }
1260
1261 /* Although gl_PrimitiveID appears in tessellation control and tessellation
1262 * evaluation shaders, it has a different function there than it has in
1263 * geometry shaders, so we treat it (and its counterpart gl_PrimitiveIDIn)
1264 * as special geometry shader variables.
1265 *
1266 * Note that although the general convention of suffixing geometry shader
1267 * input varyings with "In" was not adopted into GLSL 1.50, it is used in
1268 * the specific case of gl_PrimitiveIDIn. So we don't need to treat
1269 * gl_PrimitiveIDIn as an {ARB,EXT}_geometry_shader4-only variable.
1270 */
1271 var = add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
1272 "gl_PrimitiveIDIn");
1273 var->data.interpolation = INTERP_MODE_FLAT;
1274 var = add_output(VARYING_SLOT_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
1275 "gl_PrimitiveID");
1276 var->data.interpolation = INTERP_MODE_FLAT;
1277}
1278
1279
1280/**
1281 * Generate variables which only exist in fragment shaders.
1282 */
1283void
1284builtin_variable_generator::generate_fs_special_vars()
1285{
1286 ir_variable *var;
1287
1288 int frag_coord_precision = (state->is_version(0, 300) ?
1289 GLSL_PRECISION_HIGH :
1290 GLSL_PRECISION_MEDIUM);
1291
1292 if (this->state->ctx->Const.GLSLFragCoordIsSysVal) {
1293 add_system_value(SYSTEM_VALUE_FRAG_COORD, vec4_t, frag_coord_precision,
1294 "gl_FragCoord");
1295 } else {
1296 add_input(VARYING_SLOT_POS, vec4_t, frag_coord_precision, "gl_FragCoord");
1297 }
1298
1299 if (this->state->ctx->Const.GLSLFrontFacingIsSysVal) {
1300 var = add_system_value(SYSTEM_VALUE_FRONT_FACE, bool_t, "gl_FrontFacing");
1301 var->data.interpolation = INTERP_MODE_FLAT;
1302 } else {
1303 var = add_input(VARYING_SLOT_FACE, bool_t, "gl_FrontFacing");
1304 var->data.interpolation = INTERP_MODE_FLAT;
1305 }
1306
1307 if (state->is_version(120, 100)) {
1308 if (this->state->ctx->Const.GLSLPointCoordIsSysVal)
1309 add_system_value(SYSTEM_VALUE_POINT_COORD, vec2_t,
1310 GLSL_PRECISION_MEDIUM, "gl_PointCoord");
1311 else
1312 add_input(VARYING_SLOT_PNTC, vec2_t, GLSL_PRECISION_MEDIUM,
1313 "gl_PointCoord");
1314 }
1315
1316 if (state->has_geometry_shader() || state->EXT_gpu_shader4_enable) {
1317 var = add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
1318 "gl_PrimitiveID");
1319 var->data.interpolation = INTERP_MODE_FLAT;
1320 }
1321
1322 /* gl_FragColor and gl_FragData were deprecated starting in desktop GLSL
1323 * 1.30, and were relegated to the compatibility profile in GLSL 4.20.
1324 * They were removed from GLSL ES 3.00.
1325 */
1326 if (compatibility || !state->is_version(420, 300)) {
1327 add_output(FRAG_RESULT_COLOR, vec4_t, GLSL_PRECISION_MEDIUM,
1328 "gl_FragColor");
1329 add_output(FRAG_RESULT_DATA0,
1330 array(vec4_t, state->Const.MaxDrawBuffers),
1331 GLSL_PRECISION_MEDIUM,
1332 "gl_FragData");
1333 }
1334
1335 if (state->has_framebuffer_fetch() && !state->is_version(130, 300)) {
1336 ir_variable *const var =
1337 add_output(FRAG_RESULT_DATA0,
1338 array(vec4_t, state->Const.MaxDrawBuffers),
1339 "gl_LastFragData");
1340 var->data.precision = GLSL_PRECISION_MEDIUM;
1341 var->data.read_only = 1;
1342 var->data.fb_fetch_output = 1;
1343 var->data.memory_coherent = 1;
1344 }
1345
1346 if (state->es_shader && state->language_version == 100 && state->EXT_blend_func_extended_enable) {
1347 add_index_output(FRAG_RESULT_COLOR, 1, vec4_t,
1348 GLSL_PRECISION_MEDIUM, "gl_SecondaryFragColorEXT");
1349 add_index_output(FRAG_RESULT_DATA0, 1,
1350 array(vec4_t, state->Const.MaxDualSourceDrawBuffers),
1351 GLSL_PRECISION_MEDIUM, "gl_SecondaryFragDataEXT");
1352 }
1353
1354 /* gl_FragDepth has always been in desktop GLSL, but did not appear in GLSL
1355 * ES 1.00.
1356 */
1357 if (state->is_version(110, 300)) {
1358 add_output(FRAG_RESULT_DEPTH, float_t, GLSL_PRECISION_HIGH,
1359 "gl_FragDepth");
1360 }
1361
1362 if (state->EXT_frag_depth_enable)
1363 add_output(FRAG_RESULT_DEPTH, float_t, "gl_FragDepthEXT");
1364
1365 if (state->ARB_shader_stencil_export_enable) {
1366 ir_variable *const var =
1367 add_output(FRAG_RESULT_STENCIL, int_t, "gl_FragStencilRefARB");
1368 if (state->ARB_shader_stencil_export_warn)
1369 var->enable_extension_warning("GL_ARB_shader_stencil_export");
1370 }
1371
1372 if (state->AMD_shader_stencil_export_enable) {
1373 ir_variable *const var =
1374 add_output(FRAG_RESULT_STENCIL, int_t, "gl_FragStencilRefAMD");
1375 if (state->AMD_shader_stencil_export_warn)
1376 var->enable_extension_warning("GL_AMD_shader_stencil_export");
1377 }
1378
1379 if (state->is_version(400, 320) ||
1380 state->ARB_sample_shading_enable ||
1381 state->OES_sample_variables_enable) {
1382 add_system_value(SYSTEM_VALUE_SAMPLE_ID, int_t, GLSL_PRECISION_LOW,
1383 "gl_SampleID");
1384 add_system_value(SYSTEM_VALUE_SAMPLE_POS, vec2_t, GLSL_PRECISION_MEDIUM,
1385 "gl_SamplePosition");
1386 /* From the ARB_sample_shading specification:
1387 * "The number of elements in the array is ceil(<s>/32), where
1388 * <s> is the maximum number of color samples supported by the
1389 * implementation."
1390 * Since no drivers expose more than 32x MSAA, we can simply set
1391 * the array size to 1 rather than computing it.
1392 */
1393 add_output(FRAG_RESULT_SAMPLE_MASK, array(int_t, 1),
1394 GLSL_PRECISION_HIGH, "gl_SampleMask");
1395 }
1396
1397 if (state->is_version(400, 320) ||
1398 state->ARB_gpu_shader5_enable ||
1399 state->OES_sample_variables_enable) {
1400 add_system_value(SYSTEM_VALUE_SAMPLE_MASK_IN, array(int_t, 1),
1401 GLSL_PRECISION_HIGH, "gl_SampleMaskIn");
1402 }
1403
1404 if (state->is_version(430, 320) ||
1405 state->ARB_fragment_layer_viewport_enable ||
1406 state->OES_geometry_shader_enable ||
1407 state->EXT_geometry_shader_enable) {
1408 var = add_input(VARYING_SLOT_LAYER, int_t, GLSL_PRECISION_HIGH,
1409 "gl_Layer");
1410 var->data.interpolation = INTERP_MODE_FLAT;
1411 }
1412
1413 if (state->is_version(430, 0) ||
1414 state->ARB_fragment_layer_viewport_enable ||
1415 state->OES_viewport_array_enable) {
1416 var = add_input(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex");
1417 var->data.interpolation = INTERP_MODE_FLAT;
1418 }
1419
1420 if (state->is_version(450, 310) || state->ARB_ES3_1_compatibility_enable)
1421 add_system_value(SYSTEM_VALUE_HELPER_INVOCATION, bool_t, "gl_HelperInvocation");
1422}
1423
1424
1425/**
1426 * Generate variables which only exist in compute shaders.
1427 */
1428void
1429builtin_variable_generator::generate_cs_special_vars()
1430{
1431 add_system_value(SYSTEM_VALUE_LOCAL_INVOCATION_ID, uvec3_t,
1432 "gl_LocalInvocationID");
1433 add_system_value(SYSTEM_VALUE_WORK_GROUP_ID, uvec3_t, "gl_WorkGroupID");
1434 add_system_value(SYSTEM_VALUE_NUM_WORK_GROUPS, uvec3_t, "gl_NumWorkGroups");
1435
1436 if (state->ARB_compute_variable_group_size_enable) {
1437 add_system_value(SYSTEM_VALUE_LOCAL_GROUP_SIZE,
1438 uvec3_t, "gl_LocalGroupSizeARB");
1439 }
1440
1441 add_system_value(SYSTEM_VALUE_GLOBAL_INVOCATION_ID,
1442 uvec3_t, "gl_GlobalInvocationID");
1443 add_system_value(SYSTEM_VALUE_LOCAL_INVOCATION_INDEX,
1444 uint_t, "gl_LocalInvocationIndex");
1445}
1446
1447
1448/**
1449 * Add a single "varying" variable. The variable's type and direction (input
1450 * or output) are adjusted as appropriate for the type of shader being
1451 * compiled.
1452 */
1453void
1454builtin_variable_generator::add_varying(int slot, const glsl_type *type,
1455 int precision, const char *name)
1456{
1457 switch (state->stage) {
1458 case MESA_SHADER_TESS_CTRL:
1459 case MESA_SHADER_TESS_EVAL:
1460 case MESA_SHADER_GEOMETRY:
1461 this->per_vertex_in.add_field(slot, type, precision, name);
1462 /* FALLTHROUGH */
1463 case MESA_SHADER_VERTEX:
1464 this->per_vertex_out.add_field(slot, type, precision, name);
1465 break;
1466 case MESA_SHADER_FRAGMENT:
1467 add_input(slot, type, precision, name);
1468 break;
1469 case MESA_SHADER_COMPUTE:
1470 /* Compute shaders don't have varyings. */
1471 break;
1472 default:
1473 break;
1474 }
1475}
1476
1477
1478/**
1479 * Generate variables that are used to communicate data from one shader stage
1480 * to the next ("varyings").
1481 */
1482void
1483builtin_variable_generator::generate_varyings()
1484{
1485 struct gl_shader_compiler_options *options =
1486 &state->ctx->Const.ShaderCompilerOptions[state->stage];
1487
1488 /* gl_Position and gl_PointSize are not visible from fragment shaders. */
1489 if (state->stage != MESA_SHADER_FRAGMENT) {
1490 add_varying(VARYING_SLOT_POS, vec4_t, GLSL_PRECISION_HIGH, "gl_Position");
1491 if (!state->es_shader ||
1492 state->stage == MESA_SHADER_VERTEX ||
1493 (state->stage == MESA_SHADER_GEOMETRY &&
1494 (state->OES_geometry_point_size_enable ||
1495 state->EXT_geometry_point_size_enable)) ||
1496 ((state->stage == MESA_SHADER_TESS_CTRL ||
1497 state->stage == MESA_SHADER_TESS_EVAL) &&
1498 (state->OES_tessellation_point_size_enable ||
1499 state->EXT_tessellation_point_size_enable))) {
1500 add_varying(VARYING_SLOT_PSIZ,
1501 float_t,
1502 state->is_version(0, 300) ?
1503 GLSL_PRECISION_HIGH :
1504 GLSL_PRECISION_MEDIUM,
1505 "gl_PointSize");
1506 }
1507 }
1508
1509 if (state->has_clip_distance()) {
1510 add_varying(VARYING_SLOT_CLIP_DIST0, array(float_t, 0),
1511 GLSL_PRECISION_HIGH, "gl_ClipDistance");
1512 }
1513 if (state->has_cull_distance()) {
1514 add_varying(VARYING_SLOT_CULL_DIST0, array(float_t, 0),
1515 GLSL_PRECISION_HIGH, "gl_CullDistance");
1516 }
1517
1518 if (compatibility) {
1519 add_varying(VARYING_SLOT_TEX0, array(vec4_t, 0), "gl_TexCoord");
1520 add_varying(VARYING_SLOT_FOGC, float_t, "gl_FogFragCoord");
1521 if (state->stage == MESA_SHADER_FRAGMENT) {
1522 add_varying(VARYING_SLOT_COL0, vec4_t, "gl_Color");
1523 add_varying(VARYING_SLOT_COL1, vec4_t, "gl_SecondaryColor");
1524 } else {
1525 add_varying(VARYING_SLOT_CLIP_VERTEX, vec4_t, "gl_ClipVertex");
1526 add_varying(VARYING_SLOT_COL0, vec4_t, "gl_FrontColor");
1527 add_varying(VARYING_SLOT_BFC0, vec4_t, "gl_BackColor");
1528 add_varying(VARYING_SLOT_COL1, vec4_t, "gl_FrontSecondaryColor");
1529 add_varying(VARYING_SLOT_BFC1, vec4_t, "gl_BackSecondaryColor");
1530 }
1531 }
1532
1533 /* Section 7.1 (Built-In Language Variables) of the GLSL 4.00 spec
1534 * says:
1535 *
1536 * "In the tessellation control language, built-in variables are
1537 * intrinsically declared as:
1538 *
1539 * in gl_PerVertex {
1540 * vec4 gl_Position;
1541 * float gl_PointSize;
1542 * float gl_ClipDistance[];
1543 * } gl_in[gl_MaxPatchVertices];"
1544 */
1545 if (state->stage == MESA_SHADER_TESS_CTRL ||
1546 state->stage == MESA_SHADER_TESS_EVAL) {
1547 const glsl_type *per_vertex_in_type =
1548 this->per_vertex_in.construct_interface_instance();
1549 add_variable("gl_in", array(per_vertex_in_type, state->Const.MaxPatchVertices),
1550 GLSL_PRECISION_NONE, ir_var_shader_in, -1);
1551 }
1552 if (state->stage == MESA_SHADER_GEOMETRY) {
1553 const glsl_type *per_vertex_in_type =
1554 this->per_vertex_in.construct_interface_instance();
1555 add_variable("gl_in", array(per_vertex_in_type, 0),
1556 GLSL_PRECISION_NONE, ir_var_shader_in, -1);
1557 }
1558 if (state->stage == MESA_SHADER_TESS_CTRL) {
1559 const glsl_type *per_vertex_out_type =
1560 this->per_vertex_out.construct_interface_instance();
1561 add_variable("gl_out", array(per_vertex_out_type, 0),
1562 GLSL_PRECISION_NONE, ir_var_shader_out, -1);
1563 }
1564 if (state->stage == MESA_SHADER_VERTEX ||
1565 state->stage == MESA_SHADER_TESS_EVAL ||
1566 state->stage == MESA_SHADER_GEOMETRY) {
1567 const glsl_type *per_vertex_out_type =
1568 this->per_vertex_out.construct_interface_instance();
1569 const glsl_struct_field *fields = per_vertex_out_type->fields.structure;
1570 for (unsigned i = 0; i < per_vertex_out_type->length; i++) {
1571 ir_variable *var =
1572 add_variable(fields[i].name, fields[i].type, fields[i].precision,
1573 ir_var_shader_out, fields[i].location);
1574 var->data.interpolation = fields[i].interpolation;
1575 var->data.centroid = fields[i].centroid;
1576 var->data.sample = fields[i].sample;
1577 var->data.patch = fields[i].patch;
1578 var->init_interface_type(per_vertex_out_type);
1579
1580 var->data.invariant = fields[i].location == VARYING_SLOT_POS &&
1581 options->PositionAlwaysInvariant;
1582 }
1583 }
1584}
1585
1586
1587}; /* Anonymous namespace */
1588
1589
1590void
1591_mesa_glsl_initialize_variables(exec_list *instructions,
1592 struct _mesa_glsl_parse_state *state)
1593{
1594 builtin_variable_generator gen(instructions, state);
1595
1596 gen.generate_constants();
1597 gen.generate_uniforms();
1
Calling 'builtin_variable_generator::generate_uniforms'
→
1598 gen.generate_special_vars();
1599
1600 gen.generate_varyings();
1601
1602 switch (state->stage) {
1603 case MESA_SHADER_VERTEX:
1604 gen.generate_vs_special_vars();
1605 break;
1606 case MESA_SHADER_TESS_CTRL:
1607 gen.generate_tcs_special_vars();
1608 break;
1609 case MESA_SHADER_TESS_EVAL:
1610 gen.generate_tes_special_vars();
1611 break;
1612 case MESA_SHADER_GEOMETRY:
1613 gen.generate_gs_special_vars();
1614 break;
1615 case MESA_SHADER_FRAGMENT:
1616 gen.generate_fs_special_vars();
1617 break;
1618 case MESA_SHADER_COMPUTE:
1619 gen.generate_cs_special_vars();
1620 break;
1621 default:
1622 break;
1623 }
1624}