Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 1 | /********************************************************** |
| 2 | * Copyright 2014 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 | #include "util/u_inlines.h" |
| 27 | #include "util/u_memory.h" |
| 28 | #include "util/u_bitmask.h" |
| 29 | #include "util/u_simple_shaders.h" |
| 30 | #include "tgsi/tgsi_ureg.h" |
| 31 | #include "tgsi/tgsi_point_sprite.h" |
| 32 | #include "tgsi/tgsi_dump.h" |
| 33 | |
| 34 | #include "svga_context.h" |
| 35 | #include "svga_shader.h" |
| 36 | #include "svga_tgsi.h" |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * Bind a new GS. This updates the derived current gs state, not the |
| 41 | * user-specified GS state. |
| 42 | */ |
| 43 | static void |
| 44 | bind_gs_state(struct svga_context *svga, |
| 45 | struct svga_geometry_shader *gs) |
| 46 | { |
| 47 | svga->curr.gs = gs; |
| 48 | svga->dirty |= SVGA_NEW_GS; |
| 49 | } |
| 50 | |
| 51 | |
| 52 | /** |
| 53 | * emulate_point_sprite searches the shader variants list to see it there is |
| 54 | * a shader variant with a token string that matches the emulation |
| 55 | * requirement. It there isn't, then it will use a tgsi utility |
| 56 | * tgsi_add_point_sprite to transform the original token string to support |
| 57 | * point sprite. A new geometry shader state will be created with the |
| 58 | * transformed token string and added to the shader variants list of the |
| 59 | * original geometry shader. The new geometry shader state will then be |
| 60 | * bound as the current geometry shader. |
| 61 | */ |
| 62 | static struct svga_shader * |
| 63 | emulate_point_sprite(struct svga_context *svga, |
| 64 | struct svga_shader *shader, |
| 65 | const struct tgsi_token *tokens) |
| 66 | { |
| 67 | struct svga_token_key key; |
| 68 | struct tgsi_token *new_tokens; |
| 69 | const struct tgsi_token *orig_tokens; |
| 70 | struct svga_geometry_shader *orig_gs = (struct svga_geometry_shader *)shader; |
| 71 | struct svga_geometry_shader *gs = NULL; |
| 72 | struct pipe_shader_state templ; |
| 73 | struct svga_stream_output *streamout = NULL; |
| 74 | int pos_out_index = -1; |
| 75 | int aa_point_coord_index = -1; |
| 76 | |
| 77 | assert(tokens != NULL); |
| 78 | |
| 79 | orig_tokens = tokens; |
| 80 | |
| 81 | /* Create a token key */ |
| 82 | memset(&key, 0, sizeof key); |
| 83 | key.gs.writes_psize = 1; |
| 84 | key.gs.sprite_coord_enable = svga->curr.rast->templ.sprite_coord_enable; |
| 85 | |
| 86 | key.gs.sprite_origin_upper_left = |
| 87 | !(svga->curr.rast->templ.sprite_coord_mode == PIPE_SPRITE_COORD_LOWER_LEFT); |
| 88 | |
| 89 | key.gs.aa_point = svga->curr.rast->templ.point_smooth; |
| 90 | |
Edward O'Callaghan | 13eb5f5 | 2015-12-04 22:08:22 +1100 | [diff] [blame] | 91 | if (orig_gs) { |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 92 | |
| 93 | /* Check if the original geometry shader has stream output and |
| 94 | * if position is one of the outputs. |
| 95 | */ |
| 96 | streamout = orig_gs->base.stream_output; |
Edward O'Callaghan | 13eb5f5 | 2015-12-04 22:08:22 +1100 | [diff] [blame] | 97 | if (streamout) { |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 98 | pos_out_index = streamout->pos_out_index; |
| 99 | key.gs.point_pos_stream_out = pos_out_index != -1; |
| 100 | } |
| 101 | |
| 102 | /* Search the shader lists to see if there is a variant that matches |
| 103 | * this token key. |
| 104 | */ |
| 105 | gs = (struct svga_geometry_shader *) |
| 106 | svga_search_shader_token_key(&orig_gs->base, &key); |
| 107 | } |
| 108 | |
| 109 | /* If there isn't, then call the tgsi utility tgsi_add_point_sprite |
| 110 | * to transform the original tokens to support point sprite. |
| 111 | * Flip the sprite origin as SVGA3D device only supports an |
| 112 | * upper-left origin. |
| 113 | */ |
| 114 | if (!gs) { |
| 115 | new_tokens = tgsi_add_point_sprite(orig_tokens, |
| 116 | key.gs.sprite_coord_enable, |
| 117 | key.gs.sprite_origin_upper_left, |
| 118 | key.gs.point_pos_stream_out, |
| 119 | key.gs.aa_point ? |
| 120 | &aa_point_coord_index : NULL); |
| 121 | |
Edward O'Callaghan | 13eb5f5 | 2015-12-04 22:08:22 +1100 | [diff] [blame] | 122 | if (!new_tokens) { |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 123 | /* if no new tokens are generated for whatever reason, just return */ |
| 124 | return NULL; |
| 125 | } |
| 126 | |
| 127 | if (0) { |
| 128 | debug_printf("Before tgsi_add_point_sprite ---------------\n"); |
| 129 | tgsi_dump(orig_tokens, 0); |
| 130 | debug_printf("After tgsi_add_point_sprite --------------\n"); |
| 131 | tgsi_dump(new_tokens, 0); |
| 132 | } |
| 133 | |
| 134 | templ.tokens = new_tokens; |
| 135 | templ.stream_output.num_outputs = 0; |
| 136 | |
Edward O'Callaghan | 13eb5f5 | 2015-12-04 22:08:22 +1100 | [diff] [blame] | 137 | if (streamout) { |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 138 | templ.stream_output = streamout->info; |
| 139 | /* The tgsi_add_point_sprite utility adds an extra output |
| 140 | * for the original point position for stream output purpose. |
| 141 | * We need to replace the position output register index in the |
| 142 | * stream output declaration with the new register index. |
| 143 | */ |
| 144 | if (pos_out_index != -1) { |
| 145 | assert(orig_gs != NULL); |
| 146 | templ.stream_output.output[pos_out_index].register_index = |
| 147 | orig_gs->base.info.num_outputs; |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /* Create a new geometry shader state with the new tokens */ |
| 152 | gs = svga->pipe.create_gs_state(&svga->pipe, &templ); |
| 153 | |
| 154 | /* Don't need the token string anymore. There is a local copy |
| 155 | * in the shader state. |
| 156 | */ |
| 157 | FREE(new_tokens); |
| 158 | |
| 159 | if (!gs) { |
| 160 | return NULL; |
| 161 | } |
| 162 | |
| 163 | gs->wide_point = TRUE; |
| 164 | gs->aa_point_coord_index = aa_point_coord_index; |
| 165 | gs->base.token_key = key; |
| 166 | gs->base.parent = &orig_gs->base; |
| 167 | gs->base.next = NULL; |
| 168 | |
| 169 | /* Add the new geometry shader to the head of the shader list |
| 170 | * pointed to by the original geometry shader. |
| 171 | */ |
Edward O'Callaghan | 13eb5f5 | 2015-12-04 22:08:22 +1100 | [diff] [blame] | 172 | if (orig_gs) { |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 173 | gs->base.next = orig_gs->base.next; |
| 174 | orig_gs->base.next = &gs->base; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /* Bind the new geometry shader state */ |
| 179 | bind_gs_state(svga, gs); |
| 180 | |
| 181 | return &gs->base; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Generate a geometry shader that emits a wide point by drawing a quad. |
| 186 | * This function first creates a passthrough geometry shader and then |
| 187 | * calls emulate_point_sprite() to transform the geometry shader to |
| 188 | * support point sprite. |
| 189 | */ |
| 190 | static struct svga_shader * |
| 191 | add_point_sprite_shader(struct svga_context *svga) |
| 192 | { |
| 193 | struct svga_vertex_shader *vs = svga->curr.vs; |
| 194 | struct svga_geometry_shader *orig_gs = vs->gs; |
| 195 | struct svga_geometry_shader *new_gs; |
| 196 | const struct tgsi_token *tokens; |
| 197 | |
| 198 | if (orig_gs == NULL) { |
| 199 | |
| 200 | /* If this is the first time adding a geometry shader to this |
| 201 | * vertex shader to support point sprite, then create |
| 202 | * a passthrough geometry shader first. |
| 203 | */ |
| 204 | orig_gs = (struct svga_geometry_shader *) |
| 205 | util_make_geometry_passthrough_shader( |
| 206 | &svga->pipe, vs->base.info.num_outputs, |
| 207 | vs->base.info.output_semantic_name, |
| 208 | vs->base.info.output_semantic_index); |
| 209 | |
Edward O'Callaghan | 13eb5f5 | 2015-12-04 22:08:22 +1100 | [diff] [blame] | 210 | if (!orig_gs) |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 211 | return NULL; |
| 212 | } |
| 213 | else { |
| 214 | if (orig_gs->base.parent) |
| 215 | orig_gs = (struct svga_geometry_shader *)orig_gs->base.parent; |
| 216 | } |
| 217 | tokens = orig_gs->base.tokens; |
| 218 | |
| 219 | /* Call emulate_point_sprite to find or create a transformed |
| 220 | * geometry shader for supporting point sprite. |
| 221 | */ |
| 222 | new_gs = (struct svga_geometry_shader *) |
| 223 | emulate_point_sprite(svga, &orig_gs->base, tokens); |
| 224 | |
| 225 | /* If this is the first time creating a geometry shader to |
| 226 | * support vertex point size, then add the new geometry shader |
| 227 | * to the vertex shader. |
| 228 | */ |
| 229 | if (vs->gs == NULL) { |
| 230 | vs->gs = new_gs; |
| 231 | } |
| 232 | |
| 233 | return &new_gs->base; |
| 234 | } |
| 235 | |
| 236 | /* update_tgsi_transform provides a hook to transform a shader if needed. |
| 237 | */ |
| 238 | static enum pipe_error |
| 239 | update_tgsi_transform(struct svga_context *svga, unsigned dirty) |
| 240 | { |
| 241 | struct svga_geometry_shader *gs = svga->curr.user_gs; /* current gs */ |
| 242 | struct svga_vertex_shader *vs = svga->curr.vs; /* currently bound vs */ |
| 243 | struct svga_shader *orig_gs; /* original gs */ |
| 244 | struct svga_shader *new_gs; /* new gs */ |
| 245 | |
| 246 | if (!svga_have_vgpu10(svga)) |
| 247 | return PIPE_OK; |
| 248 | |
| 249 | if (svga->curr.reduced_prim == PIPE_PRIM_POINTS) { |
| 250 | /* If the current prim type is POINTS and the current geometry shader |
| 251 | * emits wide points, transform the shader to emulate wide points using |
Charmaine Lee | fed72ff | 2017-03-15 15:18:14 -0700 | [diff] [blame] | 252 | * quads. NOTE: we don't do emulation of wide points in GS when |
| 253 | * transform feedback is enabled. |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 254 | */ |
Charmaine Lee | fed72ff | 2017-03-15 15:18:14 -0700 | [diff] [blame] | 255 | if (gs != NULL && !gs->base.stream_output && |
| 256 | (gs->base.info.writes_psize || gs->wide_point)) { |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 257 | orig_gs = gs->base.parent ? gs->base.parent : &gs->base; |
| 258 | new_gs = emulate_point_sprite(svga, orig_gs, orig_gs->tokens); |
| 259 | } |
| 260 | |
| 261 | /* If there is not an active geometry shader and the current vertex |
| 262 | * shader emits wide point then create a new geometry shader to emulate |
| 263 | * wide point. |
| 264 | */ |
Charmaine Lee | fed72ff | 2017-03-15 15:18:14 -0700 | [diff] [blame] | 265 | else if (gs == NULL && !vs->base.stream_output && |
Brian Paul | 8ddf98d | 2015-08-07 16:04:03 -0600 | [diff] [blame] | 266 | (svga->curr.rast->pointsize > 1.0 || |
| 267 | vs->base.info.writes_psize)) { |
| 268 | new_gs = add_point_sprite_shader(svga); |
| 269 | } |
| 270 | else { |
| 271 | /* use the user's GS */ |
| 272 | bind_gs_state(svga, svga->curr.user_gs); |
| 273 | } |
| 274 | } |
| 275 | else if (svga->curr.gs != svga->curr.user_gs) { |
| 276 | /* If current primitive type is not POINTS, then make sure |
| 277 | * we don't bind to any of the generated geometry shader |
| 278 | */ |
| 279 | bind_gs_state(svga, svga->curr.user_gs); |
| 280 | } |
| 281 | (void) new_gs; /* silence the unused var warning */ |
| 282 | |
| 283 | return PIPE_OK; |
| 284 | } |
| 285 | |
| 286 | struct svga_tracked_state svga_need_tgsi_transform = |
| 287 | { |
| 288 | "transform shader for optimization", |
| 289 | (SVGA_NEW_VS | |
| 290 | SVGA_NEW_FS | |
| 291 | SVGA_NEW_GS | |
| 292 | SVGA_NEW_REDUCED_PRIMITIVE | |
| 293 | SVGA_NEW_RAST), |
| 294 | update_tgsi_transform |
| 295 | }; |