• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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