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.
24 #include "glsl_parser_extras.h"
25 #include "glsl_symbol_table.h"
27 #include "builtin_variables.h"
30 #define Elements(x) (sizeof(x)/sizeof(*(x)))
34 add_variable(const char *name
, enum ir_variable_mode mode
,
35 const glsl_type
*type
, exec_list
*instructions
,
36 glsl_symbol_table
*symtab
)
38 ir_variable
*var
= new ir_variable(type
, name
);
43 var
->shader_in
= true;
44 var
->read_only
= true;
47 var
->shader_in
= true;
48 var
->shader_out
= true;
50 var
->shader_out
= true;
53 var
->shader_in
= true;
54 var
->read_only
= true;
61 /* Once the variable is created an initialized, add it to the symbol table
62 * and add the declaration to the IR stream.
64 instructions
->push_tail(var
);
66 symtab
->add_variable(var
->name
, var
);
72 add_builtin_variable(const builtin_variable
*proto
, exec_list
*instructions
,
73 glsl_symbol_table
*symtab
)
75 /* Create a new variable declaration from the description supplied by
78 const glsl_type
*const type
= symtab
->get_type(proto
->type
);
82 add_variable(proto
->name
, proto
->mode
, type
, instructions
, symtab
);
87 generate_110_uniforms(exec_list
*instructions
,
88 glsl_symbol_table
*symtab
)
91 ; i
< Elements(builtin_110_deprecated_uniforms
)
93 add_builtin_variable(& builtin_110_deprecated_uniforms
[i
],
94 instructions
, symtab
);
97 /* FINISHME: Add support for gl_TextureMatrix[]. The size of this array is
98 * FINISHME: implementation dependent based on the value of
99 * FINISHME: GL_MAX_TEXTURE_COORDS.
102 /* FINISHME: Add support for gl_DepthRangeParameters */
103 /* FINISHME: Add support for gl_ClipPlane[] */
104 /* FINISHME: Add support for gl_PointParameters */
106 /* FINISHME: Add support for gl_MaterialParameters
107 * FINISHME: (glFrontMaterial, glBackMaterial)
110 /* FINISHME: Add support for gl_LightSource[] */
111 /* FINISHME: Add support for gl_LightModel */
112 /* FINISHME: Add support for gl_FrontLightProduct[], gl_BackLightProduct[] */
113 /* FINISHME: Add support for gl_TextureEnvColor[] */
114 /* FINISHME: Add support for gl_ObjectPlane*[], gl_EyePlane*[] */
115 /* FINISHME: Add support for gl_Fog */
119 generate_110_vs_variables(exec_list
*instructions
,
120 glsl_symbol_table
*symtab
)
122 for (unsigned i
= 0; i
< Elements(builtin_core_vs_variables
); i
++) {
123 add_builtin_variable(& builtin_core_vs_variables
[i
],
124 instructions
, symtab
);
128 ; i
< Elements(builtin_110_deprecated_vs_variables
)
130 add_builtin_variable(& builtin_110_deprecated_vs_variables
[i
],
131 instructions
, symtab
);
133 generate_110_uniforms(instructions
, symtab
);
135 /* FINISHME: The size of this array is implementation dependent based on the
136 * FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
137 * FINISHME: at least 2, so hard-code 2 for now.
139 const glsl_type
*const vec4_type
=
140 glsl_type::get_instance(GLSL_TYPE_FLOAT
, 4, 1);
141 const glsl_type
*const vec4_array_type
=
142 glsl_type::get_array_instance(vec4_type
, 2);
144 add_variable("gl_TexCoord", ir_var_out
, vec4_array_type
, instructions
,
150 generate_120_vs_variables(exec_list
*instructions
,
151 glsl_symbol_table
*symtab
)
153 /* GLSL version 1.20 did not add any built-in variables in the vertex
156 generate_110_vs_variables(instructions
, symtab
);
161 generate_130_vs_variables(exec_list
*instructions
,
162 glsl_symbol_table
*symtab
)
164 generate_120_vs_variables(instructions
, symtab
);
166 for (unsigned i
= 0; i
< Elements(builtin_130_vs_variables
); i
++) {
167 add_builtin_variable(& builtin_130_vs_variables
[i
],
168 instructions
, symtab
);
171 /* FINISHME: The size of this array is implementation dependent based on
172 * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
174 const glsl_type
*const clip_distance_array_type
=
175 glsl_type::get_array_instance(glsl_type::float_type
, 8);
176 add_variable("gl_ClipDistance", ir_var_out
, clip_distance_array_type
,
177 instructions
, symtab
);
183 initialize_vs_variables(exec_list
*instructions
,
184 struct _mesa_glsl_parse_state
*state
)
187 switch (state
->language_version
) {
189 generate_110_vs_variables(instructions
, state
->symbols
);
192 generate_120_vs_variables(instructions
, state
->symbols
);
195 generate_130_vs_variables(instructions
, state
->symbols
);
201 generate_110_fs_variables(exec_list
*instructions
,
202 glsl_symbol_table
*symtab
)
204 for (unsigned i
= 0; i
< Elements(builtin_core_fs_variables
); i
++) {
205 add_builtin_variable(& builtin_core_fs_variables
[i
],
206 instructions
, symtab
);
210 ; i
< Elements(builtin_110_deprecated_fs_variables
)
212 add_builtin_variable(& builtin_110_deprecated_fs_variables
[i
],
213 instructions
, symtab
);
215 generate_110_uniforms(instructions
, symtab
);
217 /* FINISHME: The size of this array is implementation dependent based on the
218 * FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
219 * FINISHME: at least 2, so hard-code 2 for now.
221 const glsl_type
*const vec4_type
=
222 glsl_type::get_instance(GLSL_TYPE_FLOAT
, 4, 1);
223 const glsl_type
*const vec4_array_type
=
224 glsl_type::get_array_instance(vec4_type
, 2);
226 add_variable("gl_TexCoord", ir_var_in
, vec4_array_type
, instructions
,
232 generate_ARB_draw_buffers_fs_variables(exec_list
*instructions
,
233 glsl_symbol_table
*symtab
, bool warn
)
235 /* FINISHME: The size of this array is implementation dependent based on the
236 * FINISHME: value of GL_MAX_DRAW_BUFFERS. GL_MAX_DRAW_BUFFERS must be
237 * FINISHME: at least 1, so hard-code 1 for now.
239 const glsl_type
*const vec4_type
=
240 glsl_type::get_instance(GLSL_TYPE_FLOAT
, 4, 1);
241 const glsl_type
*const vec4_array_type
=
242 glsl_type::get_array_instance(vec4_type
, 1);
244 ir_variable
*const fd
=
245 add_variable("gl_FragData", ir_var_out
, vec4_array_type
, instructions
,
249 fd
->warn_extension
= "GL_ARB_draw_buffers";
254 generate_120_fs_variables(exec_list
*instructions
,
255 glsl_symbol_table
*symtab
)
257 generate_110_fs_variables(instructions
, symtab
);
258 generate_ARB_draw_buffers_fs_variables(instructions
, symtab
, false);
262 generate_130_fs_variables(exec_list
*instructions
,
263 glsl_symbol_table
*symtab
)
265 generate_120_fs_variables(instructions
, symtab
);
267 /* FINISHME: The size of this array is implementation dependent based on
268 * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
270 const glsl_type
*const clip_distance_array_type
=
271 glsl_type::get_array_instance(glsl_type::float_type
, 8);
272 add_variable("gl_ClipDistance", ir_var_in
, clip_distance_array_type
,
273 instructions
, symtab
);
277 initialize_fs_variables(exec_list
*instructions
,
278 struct _mesa_glsl_parse_state
*state
)
281 switch (state
->language_version
) {
283 generate_110_fs_variables(instructions
, state
->symbols
);
286 generate_120_fs_variables(instructions
, state
->symbols
);
289 generate_130_fs_variables(instructions
, state
->symbols
);
294 /* Since GL_ARB_draw_buffers is included in GLSL 1.20 and later, we
295 * can basically ignore any extension settings for it.
297 if (state
->language_version
< 120) {
298 if (state
->ARB_draw_buffers_enable
) {
299 generate_ARB_draw_buffers_fs_variables(instructions
, state
->symbols
,
300 state
->ARB_draw_buffers_warn
);
306 _mesa_glsl_initialize_variables(exec_list
*instructions
,
307 struct _mesa_glsl_parse_state
*state
)
309 switch (state
->target
) {
311 initialize_vs_variables(instructions
, state
);
313 case geometry_shader
:
315 case fragment_shader
:
316 initialize_fs_variables(instructions
, state
);