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
);
41 if (var
->mode
!= ir_var_out
)
42 var
->read_only
= true;
45 /* Once the variable is created an initialized, add it to the symbol table
46 * and add the declaration to the IR stream.
48 instructions
->push_tail(var
);
50 symtab
->add_variable(var
->name
, var
);
56 add_builtin_variable(const builtin_variable
*proto
, exec_list
*instructions
,
57 glsl_symbol_table
*symtab
)
59 /* Create a new variable declaration from the description supplied by
62 const glsl_type
*const type
= symtab
->get_type(proto
->type
);
66 add_variable(proto
->name
, proto
->mode
, type
, instructions
, symtab
);
71 generate_110_uniforms(exec_list
*instructions
,
72 glsl_symbol_table
*symtab
)
75 ; i
< Elements(builtin_110_deprecated_uniforms
)
77 add_builtin_variable(& builtin_110_deprecated_uniforms
[i
],
78 instructions
, symtab
);
81 /* FINISHME: Add support for gl_TextureMatrix[]. The size of this array is
82 * FINISHME: implementation dependent based on the value of
83 * FINISHME: GL_MAX_TEXTURE_COORDS.
86 /* FINISHME: Add support for gl_DepthRangeParameters */
87 /* FINISHME: Add support for gl_ClipPlane[] */
88 /* FINISHME: Add support for gl_PointParameters */
90 /* FINISHME: Add support for gl_MaterialParameters
91 * FINISHME: (glFrontMaterial, glBackMaterial)
94 /* FINISHME: Add support for gl_LightSource[] */
95 /* FINISHME: Add support for gl_LightModel */
96 /* FINISHME: Add support for gl_FrontLightProduct[], gl_BackLightProduct[] */
97 /* FINISHME: Add support for gl_TextureEnvColor[] */
98 /* FINISHME: Add support for gl_ObjectPlane*[], gl_EyePlane*[] */
99 /* FINISHME: Add support for gl_Fog */
103 generate_110_vs_variables(exec_list
*instructions
,
104 glsl_symbol_table
*symtab
)
106 for (unsigned i
= 0; i
< Elements(builtin_core_vs_variables
); i
++) {
107 add_builtin_variable(& builtin_core_vs_variables
[i
],
108 instructions
, symtab
);
112 ; i
< Elements(builtin_110_deprecated_vs_variables
)
114 add_builtin_variable(& builtin_110_deprecated_vs_variables
[i
],
115 instructions
, symtab
);
117 generate_110_uniforms(instructions
, symtab
);
119 /* FINISHME: The size of this array is implementation dependent based on the
120 * FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
121 * FINISHME: at least 2, so hard-code 2 for now.
123 const glsl_type
*const vec4_type
=
124 glsl_type::get_instance(GLSL_TYPE_FLOAT
, 4, 1);
125 const glsl_type
*const vec4_array_type
=
126 glsl_type::get_array_instance(vec4_type
, 2);
128 add_variable("gl_TexCoord", ir_var_out
, vec4_array_type
, instructions
,
134 generate_120_vs_variables(exec_list
*instructions
,
135 glsl_symbol_table
*symtab
)
137 /* GLSL version 1.20 did not add any built-in variables in the vertex
140 generate_110_vs_variables(instructions
, symtab
);
145 generate_130_vs_variables(exec_list
*instructions
,
146 glsl_symbol_table
*symtab
)
148 generate_120_vs_variables(instructions
, symtab
);
150 for (unsigned i
= 0; i
< Elements(builtin_130_vs_variables
); i
++) {
151 add_builtin_variable(& builtin_130_vs_variables
[i
],
152 instructions
, symtab
);
155 /* FINISHME: The size of this array is implementation dependent based on
156 * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
158 const glsl_type
*const clip_distance_array_type
=
159 glsl_type::get_array_instance(glsl_type::float_type
, 8);
160 add_variable("gl_ClipDistance", ir_var_out
, clip_distance_array_type
,
161 instructions
, symtab
);
167 initialize_vs_variables(exec_list
*instructions
,
168 struct _mesa_glsl_parse_state
*state
)
171 switch (state
->language_version
) {
173 generate_110_vs_variables(instructions
, state
->symbols
);
176 generate_120_vs_variables(instructions
, state
->symbols
);
179 generate_130_vs_variables(instructions
, state
->symbols
);
185 generate_110_fs_variables(exec_list
*instructions
,
186 glsl_symbol_table
*symtab
)
188 for (unsigned i
= 0; i
< Elements(builtin_core_fs_variables
); i
++) {
189 add_builtin_variable(& builtin_core_fs_variables
[i
],
190 instructions
, symtab
);
194 ; i
< Elements(builtin_110_deprecated_fs_variables
)
196 add_builtin_variable(& builtin_110_deprecated_fs_variables
[i
],
197 instructions
, symtab
);
199 generate_110_uniforms(instructions
, symtab
);
201 /* FINISHME: The size of this array is implementation dependent based on the
202 * FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
203 * FINISHME: at least 2, so hard-code 2 for now.
205 const glsl_type
*const vec4_type
=
206 glsl_type::get_instance(GLSL_TYPE_FLOAT
, 4, 1);
207 const glsl_type
*const vec4_array_type
=
208 glsl_type::get_array_instance(vec4_type
, 2);
210 add_variable("gl_TexCoord", ir_var_in
, vec4_array_type
, instructions
,
216 generate_ARB_draw_buffers_fs_variables(exec_list
*instructions
,
217 glsl_symbol_table
*symtab
, bool warn
)
219 /* FINISHME: The size of this array is implementation dependent based on the
220 * FINISHME: value of GL_MAX_DRAW_BUFFERS. GL_MAX_DRAW_BUFFERS must be
221 * FINISHME: at least 1, so hard-code 1 for now.
223 const glsl_type
*const vec4_type
=
224 glsl_type::get_instance(GLSL_TYPE_FLOAT
, 4, 1);
225 const glsl_type
*const vec4_array_type
=
226 glsl_type::get_array_instance(vec4_type
, 1);
228 ir_variable
*const fd
=
229 add_variable("gl_FragData", ir_var_out
, vec4_array_type
, instructions
,
233 fd
->warn_extension
= "GL_ARB_draw_buffers";
238 generate_120_fs_variables(exec_list
*instructions
,
239 glsl_symbol_table
*symtab
)
241 generate_110_fs_variables(instructions
, symtab
);
242 generate_ARB_draw_buffers_fs_variables(instructions
, symtab
, false);
246 generate_130_fs_variables(exec_list
*instructions
,
247 glsl_symbol_table
*symtab
)
249 generate_120_fs_variables(instructions
, symtab
);
251 /* FINISHME: The size of this array is implementation dependent based on
252 * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
254 const glsl_type
*const clip_distance_array_type
=
255 glsl_type::get_array_instance(glsl_type::float_type
, 8);
256 add_variable("gl_ClipDistance", ir_var_in
, clip_distance_array_type
,
257 instructions
, symtab
);
261 initialize_fs_variables(exec_list
*instructions
,
262 struct _mesa_glsl_parse_state
*state
)
265 switch (state
->language_version
) {
267 generate_110_fs_variables(instructions
, state
->symbols
);
270 generate_120_fs_variables(instructions
, state
->symbols
);
273 generate_130_fs_variables(instructions
, state
->symbols
);
278 /* Since GL_ARB_draw_buffers is included in GLSL 1.20 and later, we
279 * can basically ignore any extension settings for it.
281 if (state
->language_version
< 120) {
282 if (state
->ARB_draw_buffers_enable
) {
283 generate_ARB_draw_buffers_fs_variables(instructions
, state
->symbols
,
284 state
->ARB_draw_buffers_warn
);
290 _mesa_glsl_initialize_variables(exec_list
*instructions
,
291 struct _mesa_glsl_parse_state
*state
)
293 switch (state
->target
) {
295 initialize_vs_variables(instructions
, state
);
297 case geometry_shader
:
299 case fragment_shader
:
300 initialize_fs_variables(instructions
, state
);