src/gallium/drivers/nvfx/nvfx_draw.c

   1 #include "pipe/p_shader_tokens.h"
   2 #include "util/u_inlines.h"
   3 #include "tgsi/tgsi_ureg.h"
   4
   5 #include "util/u_pack_color.h"
   6
   7 #include "draw/draw_context.h"
   8 #include "draw/draw_vertex.h"
   9 #include "draw/draw_pipe.h"
  10
  11 #include "nvfx_context.h"
  12 #include "nv30_vertprog.h"
  13 #include "nv40_vertprog.h"
  14
  15 /* Simple, but crappy, swtnl path, hopefully we wont need to hit this very
  16  * often at all.  Uses "quadro style" vertex submission + a fixed vertex
  17  * layout to avoid the need to generate a vertex program or vtxfmt.
  18  */
  19
  20 struct nvfx_render_stage {
  21         struct draw_stage stage;
  22         struct nvfx_context *nvfx;
  23         unsigned prim;
  24 };
  25
  26 static INLINE struct nvfx_render_stage *
  27 nvfx_render_stage(struct draw_stage *stage)
  28 {
  29         return (struct nvfx_render_stage *)stage;
  30 }
  31
  32 static INLINE void
  33 nvfx_render_vertex(struct nvfx_context *nvfx, const struct vertex_header *v)
  34 {
  35         struct nvfx_screen *screen = nvfx->screen;
  36         struct nouveau_channel *chan = screen->base.channel;
  37         struct nouveau_grobj *eng3d = screen->eng3d;
  38         unsigned i;
  39
  40         for (i = 0; i < nvfx->swtnl.nr_attribs; i++) {
  41                 unsigned idx = nvfx->swtnl.draw[i];
  42                 unsigned hw = nvfx->swtnl.hw[i];
  43
  44                 switch (nvfx->swtnl.emit[i]) {
  45                 case EMIT_OMIT:
  46                         break;
  47                 case EMIT_1F:
  48                         BEGIN_RING(chan, eng3d, NV34TCL_VTX_ATTR_1F(hw), 1);
  49                         OUT_RING  (chan, fui(v->data[idx][0]));
  50                         break;
  51                 case EMIT_2F:
  52                         BEGIN_RING(chan, eng3d, NV34TCL_VTX_ATTR_2F_X(hw), 2);
  53                         OUT_RING  (chan, fui(v->data[idx][0]));
  54                         OUT_RING  (chan, fui(v->data[idx][1]));
  55                         break;
  56                 case EMIT_3F:
  57                         BEGIN_RING(chan, eng3d, NV34TCL_VTX_ATTR_3F_X(hw), 3);
  58                         OUT_RING  (chan, fui(v->data[idx][0]));
  59                         OUT_RING  (chan, fui(v->data[idx][1]));
  60                         OUT_RING  (chan, fui(v->data[idx][2]));
  61                         break;
  62                 case EMIT_4F:
  63                         BEGIN_RING(chan, eng3d, NV34TCL_VTX_ATTR_4F_X(hw), 4);
  64                         OUT_RING  (chan, fui(v->data[idx][0]));
  65                         OUT_RING  (chan, fui(v->data[idx][1]));
  66                         OUT_RING  (chan, fui(v->data[idx][2]));
  67                         OUT_RING  (chan, fui(v->data[idx][3]));
  68                         break;
  69                 case 0xff:
  70                         BEGIN_RING(chan, eng3d, NV34TCL_VTX_ATTR_4F_X(hw), 4);
  71                         OUT_RING  (chan, fui(v->data[idx][0] / v->data[idx][3]));
  72                         OUT_RING  (chan, fui(v->data[idx][1] / v->data[idx][3]));
  73                         OUT_RING  (chan, fui(v->data[idx][2] / v->data[idx][3]));
  74                         OUT_RING  (chan, fui(1.0f / v->data[idx][3]));
  75                         break;
  76                 case EMIT_4UB:
  77                         BEGIN_RING(chan, eng3d, NV34TCL_VTX_ATTR_4UB(hw), 1);
  78                         OUT_RING  (chan, pack_ub4(float_to_ubyte(v->data[idx][0]),
  79                                             float_to_ubyte(v->data[idx][1]),
  80                                             float_to_ubyte(v->data[idx][2]),
  81                                             float_to_ubyte(v->data[idx][3])));
  82                         break;
  83                 default:
  84                         assert(0);
  85                         break;
  86                 }
  87         }
  88 }
  89
  90 static INLINE void
  91 nvfx_render_prim(struct draw_stage *stage, struct prim_header *prim,
  92                unsigned mode, unsigned count)
  93 {
  94         struct nvfx_render_stage *rs = nvfx_render_stage(stage);
  95         struct nvfx_context *nvfx = rs->nvfx;
  96
  97         struct nvfx_screen *screen = nvfx->screen;
  98         struct nouveau_channel *chan = screen->base.channel;
  99         struct nouveau_grobj *eng3d = screen->eng3d;
 100         unsigned i;
 101
 102         /* Ensure there's room for 4xfloat32 + potentially 3 begin/end */
 103         if (AVAIL_RING(chan) < ((count * 20) + 6)) {
 104                 if (rs->prim != NV34TCL_VERTEX_BEGIN_END_STOP) {
 105                         NOUVEAU_ERR("AIII, missed flush\n");
 106                         assert(0);
 107                 }
 108                 FIRE_RING(chan);
 109                 nvfx_state_emit(nvfx);
 110         }
 111
 112         /* Switch primitive modes if necessary */
 113         if (rs->prim != mode) {
 114                 if (rs->prim != NV34TCL_VERTEX_BEGIN_END_STOP) {
 115                         BEGIN_RING(chan, eng3d, NV34TCL_VERTEX_BEGIN_END, 1);
 116                         OUT_RING  (chan, NV34TCL_VERTEX_BEGIN_END_STOP);
 117                 }
 118
 119                 BEGIN_RING(chan, eng3d, NV34TCL_VERTEX_BEGIN_END, 1);
 120                 OUT_RING  (chan, mode);
 121                 rs->prim = mode;
 122         }
 123
 124         /* Emit vertex data */
 125         for (i = 0; i < count; i++)
 126                 nvfx_render_vertex(nvfx, prim->v[i]);
 127
 128         /* If it's likely we'll need to empty the push buffer soon, finish
 129          * off the primitive now.
 130          */
 131         if (AVAIL_RING(chan) < ((count * 20) + 6)) {
 132                 BEGIN_RING(chan, eng3d, NV34TCL_VERTEX_BEGIN_END, 1);
 133                 OUT_RING  (chan, NV34TCL_VERTEX_BEGIN_END_STOP);
 134                 rs->prim = NV34TCL_VERTEX_BEGIN_END_STOP;
 135         }
 136 }
 137
 138 static void
 139 nvfx_render_point(struct draw_stage *draw, struct prim_header *prim)
 140 {
 141         nvfx_render_prim(draw, prim, NV34TCL_VERTEX_BEGIN_END_POINTS, 1);
 142 }
 143
 144 static void
 145 nvfx_render_line(struct draw_stage *draw, struct prim_header *prim)
 146 {
 147         nvfx_render_prim(draw, prim, NV34TCL_VERTEX_BEGIN_END_LINES, 2);
 148 }
 149
 150 static void
 151 nvfx_render_tri(struct draw_stage *draw, struct prim_header *prim)
 152 {
 153         nvfx_render_prim(draw, prim, NV34TCL_VERTEX_BEGIN_END_TRIANGLES, 3);
 154 }
 155
 156 static void
 157 nvfx_render_flush(struct draw_stage *draw, unsigned flags)
 158 {
 159         struct nvfx_render_stage *rs = nvfx_render_stage(draw);
 160         struct nvfx_context *nvfx = rs->nvfx;
 161         struct nvfx_screen *screen = nvfx->screen;
 162         struct nouveau_channel *chan = screen->base.channel;
 163         struct nouveau_grobj *eng3d = screen->eng3d;
 164
 165         if (rs->prim != NV34TCL_VERTEX_BEGIN_END_STOP) {
 166                 BEGIN_RING(chan, eng3d, NV34TCL_VERTEX_BEGIN_END, 1);
 167                 OUT_RING  (chan, NV34TCL_VERTEX_BEGIN_END_STOP);
 168                 rs->prim = NV34TCL_VERTEX_BEGIN_END_STOP;
 169         }
 170 }
 171
 172 static void
 173 nvfx_render_reset_stipple_counter(struct draw_stage *draw)
 174 {
 175 }
 176
 177 static void
 178 nvfx_render_destroy(struct draw_stage *draw)
 179 {
 180         FREE(draw);
 181 }
 182
 183 static struct nvfx_vertex_program *
 184 nvfx_create_drawvp(struct nvfx_context *nvfx)
 185 {
 186         struct ureg_program *ureg;
 187         uint i;
 188
 189         ureg = ureg_create( TGSI_PROCESSOR_VERTEX );
 190         if (ureg == NULL)
 191                 return NULL;
 192
 193         ureg_MOV(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0), ureg_DECL_vs_input(ureg, 0));
 194         ureg_MOV(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0), ureg_DECL_vs_input(ureg, 3));
 195         ureg_MOV(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 1), ureg_DECL_vs_input(ureg, 4));
 196         ureg_MOV(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_BCOLOR, 0), ureg_DECL_vs_input(ureg, 3));
 197         ureg_MOV(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_BCOLOR, 1), ureg_DECL_vs_input(ureg, 4));
 198         ureg_MOV(ureg,
 199                    ureg_writemask(ureg_DECL_output(ureg, TGSI_SEMANTIC_FOG, 1), TGSI_WRITEMASK_X),
 200                    ureg_DECL_vs_input(ureg, 5));
 201         for (i = 0; i < 8; ++i)
 202                 ureg_MOV(ureg, ureg_DECL_output(ureg, TGSI_SEMANTIC_GENERIC, i), ureg_DECL_vs_input(ureg, 8 + i));
 203
 204         ureg_END( ureg );
 205
 206         return ureg_create_shader_and_destroy( ureg, &nvfx->pipe );
 207 }
 208
 209 struct draw_stage *
 210 nvfx_draw_render_stage(struct nvfx_context *nvfx)
 211 {
 212         struct nvfx_render_stage *render = CALLOC_STRUCT(nvfx_render_stage);
 213
 214         if (!nvfx->swtnl.vertprog)
 215                 nvfx->swtnl.vertprog = nvfx_create_drawvp(nvfx);
 216
 217         render->nvfx = nvfx;
 218         render->stage.draw = nvfx->draw;
 219         render->stage.point = nvfx_render_point;
 220         render->stage.line = nvfx_render_line;
 221         render->stage.tri = nvfx_render_tri;
 222         render->stage.flush = nvfx_render_flush;
 223         render->stage.reset_stipple_counter = nvfx_render_reset_stipple_counter;
 224         render->stage.destroy = nvfx_render_destroy;
 225
 226         return &render->stage;
 227 }
 228
 229 void
 230 nvfx_draw_elements_swtnl(struct pipe_context *pipe,
 231                          struct pipe_buffer *idxbuf, unsigned idxbuf_size,
 232                          unsigned mode, unsigned start, unsigned count)
 233 {
 234         struct nvfx_context *nvfx = nvfx_context(pipe);
 235         struct pipe_screen *pscreen = pipe->screen;
 236         unsigned i;
 237         void *map;
 238
 239         if (!nvfx_state_validate_swtnl(nvfx))
 240                 return;
 241         nvfx->state.dirty &= ~(1ULL << NVFX_STATE_VTXBUF);
 242         nvfx_state_emit(nvfx);
 243
 244         for (i = 0; i < nvfx->vtxbuf_nr; i++) {
 245                 map = pipe_buffer_map(pscreen, nvfx->vtxbuf[i].buffer,
 246                                       PIPE_BUFFER_USAGE_CPU_READ);
 247                 draw_set_mapped_vertex_buffer(nvfx->draw, i, map);
 248         }
 249
 250         if (idxbuf) {
 251                 map = pipe_buffer_map(pscreen, idxbuf,
 252                                       PIPE_BUFFER_USAGE_CPU_READ);
 253                 draw_set_mapped_element_buffer(nvfx->draw, idxbuf_size, map);
 254         } else {
 255                 draw_set_mapped_element_buffer(nvfx->draw, 0, NULL);
 256         }
 257
 258         if (nvfx->constbuf[PIPE_SHADER_VERTEX]) {
 259                 const unsigned nr = nvfx->constbuf_nr[PIPE_SHADER_VERTEX];
 260
 261                 map = pipe_buffer_map(pscreen,
 262                                       nvfx->constbuf[PIPE_SHADER_VERTEX],
 263                                       PIPE_BUFFER_USAGE_CPU_READ);
 264                 draw_set_mapped_constant_buffer(nvfx->draw, PIPE_SHADER_VERTEX, 0,
 265                                                 map, nr);
 266         }
 267
 268         draw_arrays(nvfx->draw, mode, start, count);
 269
 270         for (i = 0; i < nvfx->vtxbuf_nr; i++)
 271                 pipe_buffer_unmap(pscreen, nvfx->vtxbuf[i].buffer);
 272
 273         if (idxbuf)
 274                 pipe_buffer_unmap(pscreen, idxbuf);
 275
 276         if (nvfx->constbuf[PIPE_SHADER_VERTEX])
 277                 pipe_buffer_unmap(pscreen, nvfx->constbuf[PIPE_SHADER_VERTEX]);
 278
 279         draw_flush(nvfx->draw);
 280         pipe->flush(pipe, 0, NULL);
 281 }
 282
 283 static INLINE void
 284 emit_attrib(struct nvfx_context *nvfx, unsigned hw, unsigned emit,
 285             unsigned semantic, unsigned index)
 286 {
 287         unsigned draw_out = draw_find_shader_output(nvfx->draw, semantic, index);
 288         unsigned a = nvfx->swtnl.nr_attribs++;
 289
 290         nvfx->swtnl.hw[a] = hw;
 291         nvfx->swtnl.emit[a] = emit;
 292         nvfx->swtnl.draw[a] = draw_out;
 293 }
 294
 295 static boolean
 296 nvfx_state_vtxfmt_validate(struct nvfx_context *nvfx)
 297 {
 298         struct nvfx_fragment_program *fp = nvfx->fragprog;
 299         unsigned colour = 0, texcoords = 0, fog = 0, i;
 300
 301         /* Determine needed fragprog inputs */
 302         for (i = 0; i < fp->info.num_inputs; i++) {
 303                 switch (fp->info.input_semantic_name[i]) {
 304                 case TGSI_SEMANTIC_POSITION:
 305                         break;
 306                 case TGSI_SEMANTIC_COLOR:
 307                         colour |= (1 << fp->info.input_semantic_index[i]);
 308                         break;
 309                 case TGSI_SEMANTIC_GENERIC:
 310                         texcoords |= (1 << fp->info.input_semantic_index[i]);
 311                         break;
 312                 case TGSI_SEMANTIC_FOG:
 313                         fog = 1;
 314                         break;
 315                 default:
 316                         assert(0);
 317                 }
 318         }
 319
 320         nvfx->swtnl.nr_attribs = 0;
 321
 322         /* Map draw vtxprog output to hw attribute IDs */
 323         for (i = 0; i < 2; i++) {
 324                 if (!(colour & (1 << i)))
 325                         continue;
 326                 emit_attrib(nvfx, 3 + i, EMIT_4F, TGSI_SEMANTIC_COLOR, i);
 327         }
 328
 329         for (i = 0; i < 8; i++) {
 330                 if (!(texcoords & (1 << i)))
 331                         continue;
 332                 emit_attrib(nvfx, 8 + i, EMIT_4F, TGSI_SEMANTIC_GENERIC, i);
 333         }
 334
 335         if (fog) {
 336                 emit_attrib(nvfx, 5, EMIT_1F, TGSI_SEMANTIC_FOG, 0);
 337         }
 338
 339         emit_attrib(nvfx, 0, 0xff, TGSI_SEMANTIC_POSITION, 0);
 340
 341         return FALSE;
 342 }
 343
 344 struct nvfx_state_entry nvfx_state_vtxfmt = {
 345         .validate = nvfx_state_vtxfmt_validate,
 346         .dirty = {
 347                 .pipe = NVFX_NEW_ARRAYS | NVFX_NEW_FRAGPROG,
 348                 .hw = 0
 349         }
 350 };