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1 /*
2  * Mesa 3-D graphics library
3  * Version:  7.5
4  *
5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
6  * Copyright (C) 2008  VMware, Inc.  All Rights Reserved.
7  *
8  * Permission is hereby granted, free of charge, to any person obtaining a
9  * copy of this software and associated documentation files (the "Software"),
10  * to deal in the Software without restriction, including without limitation
11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12  * and/or sell copies of the Software, and to permit persons to whom the
13  * Software is furnished to do so, subject to the following conditions:
14  *
15  * The above copyright notice and this permission notice shall be included
16  * in all copies or substantial portions of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  */
25 
26 /**
27  * \file config.h
28  * Tunable configuration parameters.
29  */
30 
31 #ifndef MESA_CONFIG_H_INCLUDED
32 #define MESA_CONFIG_H_INCLUDED
33 
34 
35 /**
36  * \name OpenGL implementation limits
37  */
38 /*@{*/
39 
40 /** Maximum modelview matrix stack depth */
41 #define MAX_MODELVIEW_STACK_DEPTH 32
42 
43 /** Maximum projection matrix stack depth */
44 #define MAX_PROJECTION_STACK_DEPTH 32
45 
46 /** Maximum texture matrix stack depth */
47 #define MAX_TEXTURE_STACK_DEPTH 10
48 
49 /** Maximum color matrix stack depth */
50 #define MAX_COLOR_STACK_DEPTH 4
51 
52 /** Maximum attribute stack depth */
53 #define MAX_ATTRIB_STACK_DEPTH 16
54 
55 /** Maximum client attribute stack depth */
56 #define MAX_CLIENT_ATTRIB_STACK_DEPTH 16
57 
58 /** Maximum recursion depth of display list calls */
59 #define MAX_LIST_NESTING 64
60 
61 /** Maximum number of lights */
62 #define MAX_LIGHTS 8
63 
64 /** Maximum user-defined clipping planes */
65 #define MAX_CLIP_PLANES 6
66 
67 /** Maximum pixel map lookup table size */
68 #define MAX_PIXEL_MAP_TABLE 256
69 
70 /** Maximum number of auxillary color buffers */
71 #define MAX_AUX_BUFFERS 1
72 
73 /** Maximum order (degree) of curves */
74 #ifdef AMIGA
75 #   define MAX_EVAL_ORDER 12
76 #else
77 #   define MAX_EVAL_ORDER 30
78 #endif
79 
80 /** Maximum Name stack depth */
81 #define MAX_NAME_STACK_DEPTH 64
82 
83 /** Minimum point size */
84 #define MIN_POINT_SIZE 1.0
85 /** Maximum point size */
86 #define MAX_POINT_SIZE 60.0
87 /** Point size granularity */
88 #define POINT_SIZE_GRANULARITY 0.1
89 
90 /** Minimum line width */
91 #define MIN_LINE_WIDTH 1.0
92 /** Maximum line width */
93 #define MAX_LINE_WIDTH 10.0
94 /** Line width granularity */
95 #define LINE_WIDTH_GRANULARITY 0.1
96 
97 /** Max texture palette / color table size */
98 #define MAX_COLOR_TABLE_SIZE 256
99 
100 /** Max memory to allow for a single texture image (in megabytes) */
101 #define MAX_TEXTURE_MBYTES 1024
102 
103 /** Number of 1D/2D texture mipmap levels */
104 #define MAX_TEXTURE_LEVELS 15
105 
106 /** Number of 3D texture mipmap levels */
107 #define MAX_3D_TEXTURE_LEVELS 15
108 
109 /** Number of cube texture mipmap levels - GL_ARB_texture_cube_map */
110 #define MAX_CUBE_TEXTURE_LEVELS 15
111 
112 /** Maximum rectangular texture size - GL_NV_texture_rectangle */
113 #define MAX_TEXTURE_RECT_SIZE 16384
114 
115 /** Maximum number of layers in a 1D or 2D array texture - GL_MESA_texture_array */
116 #define MAX_ARRAY_TEXTURE_LAYERS 64
117 
118 /**
119  * Max number of texture coordinate units.  This mainly just applies to
120  * the fixed-function vertex code.  This will be difficult to raise above
121  * eight because of various vertex attribute bitvectors.
122  */
123 #define MAX_TEXTURE_COORD_UNITS 8
124 
125 /**
126  * Max number of texture image units.  Also determines number of texture
127  * samplers in shaders.
128  */
129 #define MAX_TEXTURE_IMAGE_UNITS 16
130 
131 /**
132  * Larger of MAX_TEXTURE_COORD_UNITS and MAX_TEXTURE_IMAGE_UNITS.
133  * This value is only used for dimensioning arrays.
134  * Either MAX_TEXTURE_COORD_UNITS or MAX_TEXTURE_IMAGE_UNITS (or the
135  * corresponding ctx->Const.MaxTextureCoord/ImageUnits fields) should be
136  * used almost everywhere else.
137  */
138 #define MAX_TEXTURE_UNITS ((MAX_TEXTURE_COORD_UNITS > MAX_TEXTURE_IMAGE_UNITS) ? MAX_TEXTURE_COORD_UNITS : MAX_TEXTURE_IMAGE_UNITS)
139 
140 
141 /**
142  * Maximum viewport/image width. Must accomodate all texture sizes too.
143  */
144 
145 #ifndef MAX_WIDTH
146 #   define MAX_WIDTH 16384
147 #endif
148 /** Maximum viewport/image height */
149 #ifndef MAX_HEIGHT
150 #   define MAX_HEIGHT 16384
151 #endif
152 
153 /* XXX: hack to prevent stack overflow on windows until all temporary arrays
154  * [MAX_WIDTH] are allocated from the heap */
155 #ifdef WIN32
156 #undef MAX_TEXTURE_LEVELS
157 #undef MAX_3D_TEXTURE_LEVELS
158 #undef MAX_CUBE_TEXTURE_LEVELS
159 #undef MAX_TEXTURE_RECT_SIZE
160 #undef MAX_WIDTH
161 #undef MAX_HEIGHT
162 #define MAX_TEXTURE_LEVELS 13
163 #define MAX_3D_TEXTURE_LEVELS 9
164 #define MAX_CUBE_TEXTURE_LEVELS 13
165 #define MAX_TEXTURE_RECT_SIZE 4096
166 #define MAX_WIDTH 4096
167 #define MAX_HEIGHT 4096
168 #endif
169 
170 /** Maxmimum size for CVA.  May be overridden by the drivers.  */
171 #define MAX_ARRAY_LOCK_SIZE 3000
172 
173 /** Subpixel precision for antialiasing, window coordinate snapping */
174 #define SUB_PIXEL_BITS 4
175 
176 /** Size of histogram tables */
177 #define HISTOGRAM_TABLE_SIZE 256
178 
179 /** Max convolution filter width */
180 #define MAX_CONVOLUTION_WIDTH 9
181 /** Max convolution filter height */
182 #define MAX_CONVOLUTION_HEIGHT 9
183 
184 /** For GL_ARB_texture_compression */
185 #define MAX_COMPRESSED_TEXTURE_FORMATS 25
186 
187 /** For GL_EXT_texture_filter_anisotropic */
188 #define MAX_TEXTURE_MAX_ANISOTROPY 16.0
189 
190 /** For GL_EXT_texture_lod_bias (typically MAX_TEXTURE_LEVELS - 1) */
191 #define MAX_TEXTURE_LOD_BIAS 14.0
192 
193 /** For any program target/extension */
194 /*@{*/
195 #define MAX_PROGRAM_INSTRUCTIONS       (16 * 1024)
196 
197 /**
198  * Per-program constants (power of two)
199  *
200  * \c MAX_PROGRAM_LOCAL_PARAMS and \c MAX_UNIFORMS are just the assembly shader
201  * and GLSL shader names for the same thing.  They should \b always have the
202  * same value.  Each refers to the number of vec4 values supplied as
203  * per-program parameters.
204  */
205 /*@{*/
206 #define MAX_PROGRAM_LOCAL_PARAMS       1024
207 #define MAX_UNIFORMS                   1024
208 /*@}*/
209 
210 /**
211  * Per-context constants (power of two)
212  *
213  * \note
214  * This value should always be less than or equal to \c MAX_PROGRAM_LOCAL_PARAMS
215  * and \c MAX_VERTEX_PROGRAM_PARAMS.  Otherwise some applications will make
216  * incorrect assumptions.
217  */
218 #define MAX_PROGRAM_ENV_PARAMS         256
219 
220 #define MAX_PROGRAM_MATRICES           8
221 #define MAX_PROGRAM_MATRIX_STACK_DEPTH 4
222 #define MAX_PROGRAM_CALL_DEPTH         8
223 #define MAX_PROGRAM_TEMPS              256
224 #define MAX_PROGRAM_ADDRESS_REGS       2
225 #define MAX_VARYING                    16    /**< number of float[4] vectors */
226 #define MAX_SAMPLERS                   MAX_TEXTURE_IMAGE_UNITS
227 #define MAX_PROGRAM_INPUTS             32
228 #define MAX_PROGRAM_OUTPUTS            64
229 /*@}*/
230 
231 /** For GL_ARB_vertex_program */
232 /*@{*/
233 #define MAX_VERTEX_PROGRAM_ADDRESS_REGS 1
234 #define MAX_VERTEX_PROGRAM_PARAMS       MAX_UNIFORMS
235 /*@}*/
236 
237 /** For GL_ARB_fragment_program */
238 /*@{*/
239 #define MAX_FRAGMENT_PROGRAM_ADDRESS_REGS 0
240 /*@}*/
241 
242 /** For GL_NV_vertex_program */
243 /*@{*/
244 #define MAX_NV_VERTEX_PROGRAM_INSTRUCTIONS 128
245 #define MAX_NV_VERTEX_PROGRAM_TEMPS         12
246 #define MAX_NV_VERTEX_PROGRAM_PARAMS        96
247 #define MAX_NV_VERTEX_PROGRAM_INPUTS        16
248 #define MAX_NV_VERTEX_PROGRAM_OUTPUTS       15
249 /*@}*/
250 
251 /** For GL_NV_fragment_program */
252 /*@{*/
253 #define MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS 1024 /* 72 for GL_ARB_f_p */
254 #define MAX_NV_FRAGMENT_PROGRAM_TEMPS         96
255 #define MAX_NV_FRAGMENT_PROGRAM_PARAMS        64
256 #define MAX_NV_FRAGMENT_PROGRAM_INPUTS        12
257 #define MAX_NV_FRAGMENT_PROGRAM_OUTPUTS        3
258 #define MAX_NV_FRAGMENT_PROGRAM_WRITE_ONLYS    2
259 /*@}*/
260 
261 
262 /** For GL_ARB_vertex_shader */
263 /*@{*/
264 #define MAX_VERTEX_GENERIC_ATTRIBS 16
265 #define MAX_VERTEX_TEXTURE_IMAGE_UNITS MAX_TEXTURE_IMAGE_UNITS
266 #define MAX_COMBINED_TEXTURE_IMAGE_UNITS (MAX_VERTEX_TEXTURE_IMAGE_UNITS + \
267 					  MAX_TEXTURE_IMAGE_UNITS)
268 /*@}*/
269 
270 
271 /** For GL_ARB_draw_buffers */
272 /*@{*/
273 #define MAX_DRAW_BUFFERS 8
274 /*@}*/
275 
276 
277 /** For GL_EXT_framebuffer_object */
278 /*@{*/
279 #define MAX_COLOR_ATTACHMENTS 8
280 /*@}*/
281 
282 /** For GL_ATI_envmap_bump - support bump mapping on first 8 units */
283 #define SUPPORTED_ATI_BUMP_UNITS 0xff
284 
285 /** For GL_EXT_transform_feedback */
286 #define MAX_FEEDBACK_ATTRIBS 32
287 
288 /** For GL_ARB_geometry_shader4 */
289 /*@{*/
290 #define MAX_GEOMETRY_TEXTURE_IMAGE_UNITS             8
291 #define MAX_GEOMETRY_VARYING_COMPONENTS              32
292 #define MAX_VERTEX_VARYING_COMPONENTS                32
293 #define MAX_GEOMETRY_UNIFORM_COMPONENTS              512
294 #define MAX_GEOMETRY_OUTPUT_VERTICES                 256
295 #define MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS         1024
296 /*@}*/
297 
298 
299 /**
300  * \name Mesa-specific parameters
301  */
302 /*@{*/
303 
304 
305 /**
306  * If non-zero use GLdouble for walking triangle edges, for better accuracy.
307  */
308 #define TRIANGLE_WALK_DOUBLE 0
309 
310 
311 /**
312  * Bits per depth buffer value (max is 32).
313  */
314 #ifndef DEFAULT_SOFTWARE_DEPTH_BITS
315 #define DEFAULT_SOFTWARE_DEPTH_BITS 16
316 #endif
317 /** Depth buffer data type */
318 #if DEFAULT_SOFTWARE_DEPTH_BITS <= 16
319 #define DEFAULT_SOFTWARE_DEPTH_TYPE GLushort
320 #else
321 #define DEFAULT_SOFTWARE_DEPTH_TYPE GLuint
322 #endif
323 
324 
325 /**
326  * Bits per stencil value: 8
327  */
328 #define STENCIL_BITS 8
329 
330 
331 /**
332  * Bits per color channel:  8, 16 or 32
333  */
334 #ifndef CHAN_BITS
335 #define CHAN_BITS 8
336 #endif
337 
338 
339 /*
340  * Color channel component order
341  *
342  * \note Changes will almost certainly cause problems at this time.
343  */
344 #define RCOMP 0
345 #define GCOMP 1
346 #define BCOMP 2
347 #define ACOMP 3
348 
349 
350 /**
351  * Maximum number of temporary vertices required for clipping.
352  *
353  * Used in array_cache and tnl modules.
354  */
355 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
356 
357 
358 #endif /* MESA_CONFIG_H_INCLUDED */
359