1 /**********************************************************
2 * Copyright 2008-2012 VMware, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26 #ifndef SVGA_SHADER_H
27 #define SVGA_SHADER_H
28
29 #include "svga3d_reg.h"
30 #include "svga_context.h"
31 #include "svga_streamout.h"
32
33
34 /**
35 * We use a 64-bit mask to keep track of the generic indexes.
36 * This is the maximum semantic index for a TGSI GENERIC[i] register.
37 */
38 #define MAX_GENERIC_VARYING 64
39
40
41 struct svga_context;
42
43
44 struct svga_compile_key
45 {
46 /* vertex shader only */
47 struct {
48 uint64_t fs_generic_inputs;
49 unsigned passthrough:1;
50 unsigned need_prescale:1;
51 unsigned undo_viewport:1;
52 unsigned allow_psiz:1;
53 /** The following are all 32-bit bitmasks (per VS input) */
54 unsigned adjust_attrib_range;
55 unsigned attrib_is_pure_int;
56 unsigned adjust_attrib_w_1;
57 unsigned adjust_attrib_itof;
58 unsigned adjust_attrib_utof;
59 unsigned attrib_is_bgra;
60 unsigned attrib_puint_to_snorm;
61 unsigned attrib_puint_to_uscaled;
62 unsigned attrib_puint_to_sscaled;
63 } vs;
64
65 /* geometry shader only */
66 struct {
67 uint64_t vs_generic_outputs;
68 unsigned need_prescale:1;
69 unsigned writes_psize:1;
70 unsigned wide_point:1;
71 } gs;
72
73 /* fragment shader only */
74 struct {
75 uint64_t vs_generic_outputs;
76 uint64_t gs_generic_outputs;
77 unsigned light_twoside:1;
78 unsigned front_ccw:1;
79 unsigned white_fragments:1;
80 unsigned alpha_to_one:1;
81 unsigned flatshade:1;
82 unsigned pstipple:1;
83 unsigned alpha_func:4; /**< SVGA3D_CMP_x */
84 unsigned write_color0_to_n_cbufs:4;
85 unsigned aa_point:1;
86 int aa_point_coord_index;
87 float alpha_ref;
88 } fs;
89
90 /* any shader type */
91 int8_t generic_remap_table[MAX_GENERIC_VARYING];
92 unsigned num_textures:8;
93 unsigned num_unnormalized_coords:8;
94 unsigned clip_plane_enable:PIPE_MAX_CLIP_PLANES;
95 unsigned sprite_origin_lower_left:1;
96 unsigned sprite_coord_enable;
97 struct {
98 unsigned compare_mode:1;
99 unsigned compare_func:3;
100 unsigned unnormalized:1;
101 unsigned texel_bias:1;
102 unsigned width_height_idx:5; /**< texture unit */
103 unsigned is_array:1;
104 unsigned sprite_texgen:1;
105 unsigned swizzle_r:3;
106 unsigned swizzle_g:3;
107 unsigned swizzle_b:3;
108 unsigned swizzle_a:3;
109 } tex[PIPE_MAX_SAMPLERS];
110 /* Note: svga_compile_keys_equal() depends on the variable-size
111 * tex[] array being at the end of this structure.
112 */
113 };
114
115 /* A key for a variant of token string of a shader */
116 struct svga_token_key {
117 struct {
118 unsigned sprite_coord_enable:24;
119 unsigned sprite_origin_upper_left:1;
120 unsigned point_pos_stream_out:1;
121 unsigned writes_psize:1;
122 unsigned aa_point:1;
123 } gs;
124 };
125
126 /**
127 * A single TGSI shader may be compiled into different variants of
128 * SVGA3D shaders depending on the compile key. Each user shader
129 * will have a linked list of these variants.
130 */
131 struct svga_shader_variant
132 {
133 const struct svga_shader *shader;
134
135 /** Parameters used to generate this variant */
136 struct svga_compile_key key;
137
138 /* Compiled shader tokens:
139 */
140 const unsigned *tokens;
141 unsigned nr_tokens;
142
143 /** Per-context shader identifier used with SVGA_3D_CMD_SHADER_DEFINE,
144 * SVGA_3D_CMD_SET_SHADER and SVGA_3D_CMD_SHADER_DESTROY.
145 */
146 unsigned id;
147
148 /** Start of extra constants (number of float[4] constants) */
149 unsigned extra_const_start;
150
151 /* GB object buffer containing the bytecode */
152 struct svga_winsys_gb_shader *gb_shader;
153
154 boolean uses_flat_interp; /** TRUE if flat interpolation qualifier is
155 * applied to any of the varyings.
156 */
157
158 /** Is the color output just a constant value? (fragment shader only) */
159 boolean constant_color_output;
160
161 /** Bitmask indicating which texture units are doing the shadow
162 * comparison test in the shader rather than the sampler state.
163 */
164 unsigned fs_shadow_compare_units;
165
166 /** For FS-based polygon stipple */
167 unsigned pstipple_sampler_unit;
168
169 /** Next variant */
170 struct svga_shader_variant *next;
171 };
172
173
174 struct svga_shader
175 {
176 const struct tgsi_token *tokens;
177 struct svga_token_key token_key; /* token key for the token string */
178 struct tgsi_shader_info info;
179
180 /* List of shaders with tokens derived from the same token string */
181 struct svga_shader *next;
182 struct svga_shader *parent; /* shader with the original token string */
183
184 struct svga_stream_output *stream_output;
185
186 /** Head of linked list of compiled variants */
187 struct svga_shader_variant *variants;
188
189 unsigned id; /**< for debugging only */
190 };
191
192
193 struct svga_fragment_shader
194 {
195 struct svga_shader base;
196
197 struct draw_fragment_shader *draw_shader;
198
199 /** Mask of which generic varying variables are read by this shader */
200 uint64_t generic_inputs;
201
202 /** Table mapping original TGSI generic indexes to low integers */
203 int8_t generic_remap_table[MAX_GENERIC_VARYING];
204 };
205
206
207 struct svga_vertex_shader
208 {
209 struct svga_shader base;
210
211 struct draw_vertex_shader *draw_shader;
212
213 /** Mask of which generic varying variables are written by this shader */
214 uint64_t generic_outputs;
215
216 /** Generated geometry shader that goes with this vertex shader */
217 struct svga_geometry_shader *gs;
218 };
219
220
221 struct svga_geometry_shader
222 {
223 struct svga_shader base;
224
225 struct draw_geometry_shader *draw_shader;
226
227 /** Table mapping original TGSI generic indexes to low integers */
228 int8_t generic_remap_table[MAX_GENERIC_VARYING];
229 uint64_t generic_outputs;
230
231 unsigned aa_point_coord_index; /* generic index for aa point coord */
232
233 unsigned wide_point:1; /* set if the shader emulates wide point */
234 };
235
236
237 static inline boolean
svga_compile_keys_equal(const struct svga_compile_key * a,const struct svga_compile_key * b)238 svga_compile_keys_equal(const struct svga_compile_key *a,
239 const struct svga_compile_key *b)
240 {
241 unsigned key_size =
242 (const char *) &a->tex[a->num_textures] - (const char *) a;
243
244 return memcmp(a, b, key_size) == 0;
245 }
246
247
248 uint64_t
249 svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
250
251 uint64_t
252 svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
253
254 void
255 svga_remap_generics(uint64_t generics_mask,
256 int8_t remap_table[MAX_GENERIC_VARYING]);
257
258 int
259 svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
260 int generic_index);
261
262 void
263 svga_init_shader_key_common(const struct svga_context *svga,
264 enum pipe_shader_type shader,
265 struct svga_compile_key *key);
266
267 struct svga_shader_variant *
268 svga_search_shader_key(const struct svga_shader *shader,
269 const struct svga_compile_key *key);
270
271 struct svga_shader *
272 svga_search_shader_token_key(struct svga_shader *shader,
273 const struct svga_token_key *key);
274
275 enum pipe_error
276 svga_define_shader(struct svga_context *svga,
277 SVGA3dShaderType type,
278 struct svga_shader_variant *variant);
279
280 enum pipe_error
281 svga_set_shader(struct svga_context *svga,
282 SVGA3dShaderType type,
283 struct svga_shader_variant *variant);
284
285 struct svga_shader_variant *
286 svga_new_shader_variant(struct svga_context *svga);
287
288 enum pipe_error
289 svga_destroy_shader_variant(struct svga_context *svga,
290 SVGA3dShaderType type,
291 struct svga_shader_variant *variant);
292
293 enum pipe_error
294 svga_rebind_shaders(struct svga_context *svga);
295
296 /**
297 * Check if a shader's bytecode exceeds the device limits.
298 */
299 static inline boolean
svga_shader_too_large(const struct svga_context * svga,const struct svga_shader_variant * variant)300 svga_shader_too_large(const struct svga_context *svga,
301 const struct svga_shader_variant *variant)
302 {
303 if (svga_have_gb_objects(svga)) {
304 return FALSE;
305 }
306
307 if (variant->nr_tokens * sizeof(variant->tokens[0])
308 + sizeof(SVGA3dCmdDefineShader) + sizeof(SVGA3dCmdHeader)
309 < SVGA_CB_MAX_COMMAND_SIZE) {
310 return FALSE;
311 }
312
313 return TRUE;
314 }
315
316
317 /**
318 * Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
319 */
320 static inline SVGA3dShaderType
svga_shader_type(enum pipe_shader_type shader)321 svga_shader_type(enum pipe_shader_type shader)
322 {
323 switch (shader) {
324 case PIPE_SHADER_VERTEX:
325 return SVGA3D_SHADERTYPE_VS;
326 case PIPE_SHADER_GEOMETRY:
327 return SVGA3D_SHADERTYPE_GS;
328 case PIPE_SHADER_FRAGMENT:
329 return SVGA3D_SHADERTYPE_PS;
330 default:
331 assert(!"Invalid shader type");
332 return SVGA3D_SHADERTYPE_VS;
333 }
334 }
335
336
337 /** Does the current VS have stream output? */
338 static inline boolean
svga_have_vs_streamout(const struct svga_context * svga)339 svga_have_vs_streamout(const struct svga_context *svga)
340 {
341 return svga->curr.vs != NULL && svga->curr.vs->base.stream_output != NULL;
342 }
343
344
345 /** Does the current GS have stream output? */
346 static inline boolean
svga_have_gs_streamout(const struct svga_context * svga)347 svga_have_gs_streamout(const struct svga_context *svga)
348 {
349 return svga->curr.gs != NULL && svga->curr.gs->base.stream_output != NULL;
350 }
351
352
353 #endif /* SVGA_SHADER_H */
354