src/gallium/auxiliary/draw/draw_private.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * 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
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * Private data structures, etc for the draw module.
  30  */
  31
  32
  33 /**
  34  * Authors:
  35  * Keith Whitwell <keith@tungstengraphics.com>
  36  * Brian Paul
  37  */
  38
  39
  40 #ifndef DRAW_PRIVATE_H
  41 #define DRAW_PRIVATE_H
  42
  43
  44 #include "pipe/p_state.h"
  45 #include "pipe/p_defines.h"
  46
  47 #include "tgsi/tgsi_scan.h"
  48
  49 #ifdef HAVE_LLVM
  50 #include <llvm-c/ExecutionEngine.h>
  51 struct draw_llvm;
  52 #endif
  53
  54
  55 struct pipe_context;
  56 struct draw_vertex_shader;
  57 struct draw_context;
  58 struct draw_stage;
  59 struct vbuf_render;
  60 struct tgsi_exec_machine;
  61 struct tgsi_sampler;
  62
  63
  64 /**
  65  * Basic vertex info.
  66  * Carry some useful information around with the vertices in the prim pipe.
  67  */
  68 struct vertex_header {
  69    unsigned clipmask:12;
  70    unsigned edgeflag:1;
  71    unsigned pad:3;
  72    unsigned vertex_id:16;
  73
  74    float clip[4];
  75
  76    /* This will probably become float (*data)[4] soon:
  77     */
  78    float data[][4];
  79 };
  80
  81 /* NOTE: It should match vertex_id size above */
  82 #define UNDEFINED_VERTEX_ID 0xffff
  83
  84
  85 /* maximum number of shader variants we can cache */
  86 #define DRAW_MAX_SHADER_VARIANTS 1024
  87
  88 /**
  89  * Private context for the drawing module.
  90  */
  91 struct draw_context
  92 {
  93    struct pipe_context *pipe;
  94
  95    /** Drawing/primitive pipeline stages */
  96    struct {
  97       struct draw_stage *first;  /**< one of the following */
  98
  99       struct draw_stage *validate;
 100
 101       /* stages (in logical order) */
 102       struct draw_stage *flatshade;
 103       struct draw_stage *clip;
 104       struct draw_stage *cull;
 105       struct draw_stage *twoside;
 106       struct draw_stage *offset;
 107       struct draw_stage *unfilled;
 108       struct draw_stage *stipple;
 109       struct draw_stage *aapoint;
 110       struct draw_stage *aaline;
 111       struct draw_stage *pstipple;
 112       struct draw_stage *wide_line;
 113       struct draw_stage *wide_point;
 114       struct draw_stage *rasterize;
 115
 116       float wide_point_threshold; /**< convert pnts to tris if larger than this */
 117       float wide_line_threshold;  /**< convert lines to tris if wider than this */
 118       boolean wide_point_sprites; /**< convert points to tris for sprite mode */
 119       boolean line_stipple;       /**< do line stipple? */
 120       boolean point_sprite;       /**< convert points to quads for sprites? */
 121
 122       /* Temporary storage while the pipeline is being run:
 123        */
 124       char *verts;
 125       unsigned vertex_stride;
 126       unsigned vertex_count;
 127    } pipeline;
 128
 129
 130    struct vbuf_render *render;
 131
 132    /* Support prototype passthrough path:
 133     */
 134    struct {
 135       struct {
 136          struct draw_pt_middle_end *fetch_emit;
 137          struct draw_pt_middle_end *fetch_shade_emit;
 138          struct draw_pt_middle_end *general;
 139          struct draw_pt_middle_end *llvm;
 140       } middle;
 141
 142       struct {
 143          struct draw_pt_front_end *vsplit;
 144       } front;
 145
 146       struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
 147       unsigned nr_vertex_buffers;
 148
 149       /*
 150        * This is the largest legal index value for the current set of
 151        * bound vertex buffers.  Regardless of any other consideration,
 152        * all vertex lookups need to be clamped to 0..max_index to
 153        * prevent out-of-bound access.
 154        */
 155       unsigned max_index;
 156
 157       struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
 158       unsigned nr_vertex_elements;
 159
 160       struct pipe_index_buffer index_buffer;
 161
 162       /* user-space vertex data, buffers */
 163       struct {
 164          /** vertex element/index buffer (ex: glDrawElements) */
 165          const void *elts;
 166          /** bytes per index (0, 1, 2 or 4) */
 167          unsigned eltSize;
 168          int eltBias;
 169          unsigned min_index;
 170          unsigned max_index;
 171
 172          /** vertex arrays */
 173          const void *vbuffer[PIPE_MAX_ATTRIBS];
 174
 175          /** constant buffers (for vertex/geometry shader) */
 176          const void *vs_constants[PIPE_MAX_CONSTANT_BUFFERS];
 177          unsigned vs_constants_size[PIPE_MAX_CONSTANT_BUFFERS];
 178          const void *gs_constants[PIPE_MAX_CONSTANT_BUFFERS];
 179          unsigned gs_constants_size[PIPE_MAX_CONSTANT_BUFFERS];
 180
 181          /* pointer to planes */
 182          float (*planes)[12][4];
 183       } user;
 184
 185       boolean test_fse;         /* enable FSE even though its not correct (eg for softpipe) */
 186       boolean no_fse;           /* disable FSE even when it is correct */
 187    } pt;
 188
 189    struct {
 190       boolean bypass_clip_xy;
 191       boolean bypass_clip_z;
 192    } driver;
 193
 194    boolean flushing;         /**< debugging/sanity */
 195    boolean suspend_flushing; /**< internally set */
 196
 197    /* Flags set if API requires clipping in these planes and the
 198     * driver doesn't indicate that it can do it for us.
 199     */
 200    boolean clip_xy;
 201    boolean clip_z;
 202    boolean clip_user;
 203
 204    boolean force_passthrough; /**< never clip or shade */
 205
 206    boolean dump_vs;
 207
 208    double mrd;  /**< minimum resolvable depth value, for polygon offset */
 209
 210    /** Current rasterizer state given to us by the driver */
 211    const struct pipe_rasterizer_state *rasterizer;
 212    /** Driver CSO handle for the current rasterizer state */
 213    void *rast_handle;
 214
 215    /** Rasterizer CSOs without culling/stipple/etc */
 216    void *rasterizer_no_cull[2][2];
 217
 218    struct pipe_viewport_state viewport;
 219    boolean identity_viewport;
 220
 221    /** Vertex shader state */
 222    struct {
 223       struct draw_vertex_shader *vertex_shader;
 224       uint num_vs_outputs;  /**< convenience, from vertex_shader */
 225       uint position_output;
 226       uint edgeflag_output;
 227
 228       /** TGSI program interpreter runtime state */
 229       struct tgsi_exec_machine *machine;
 230
 231       uint num_samplers;
 232       struct tgsi_sampler **samplers;
 233
 234       /* Here's another one:
 235        */
 236       struct aos_machine *aos_machine;
 237
 238
 239       const void *aligned_constants[PIPE_MAX_CONSTANT_BUFFERS];
 240
 241       const void *aligned_constant_storage[PIPE_MAX_CONSTANT_BUFFERS];
 242       unsigned const_storage_size[PIPE_MAX_CONSTANT_BUFFERS];
 243
 244
 245       struct translate *fetch;
 246       struct translate_cache *fetch_cache;
 247       struct translate *emit;
 248       struct translate_cache *emit_cache;
 249    } vs;
 250
 251    /** Geometry shader state */
 252    struct {
 253       struct draw_geometry_shader *geometry_shader;
 254       uint num_gs_outputs;  /**< convenience, from geometry_shader */
 255       uint position_output;
 256
 257       /** TGSI program interpreter runtime state */
 258       struct tgsi_exec_machine *machine;
 259
 260       uint num_samplers;
 261       struct tgsi_sampler **samplers;
 262    } gs;
 263
 264    /** Fragment shader state */
 265    struct {
 266       struct draw_fragment_shader *fragment_shader;
 267    } fs;
 268
 269    /** Stream output (vertex feedback) state */
 270    struct {
 271       struct pipe_stream_output_state state;
 272       void *buffers[PIPE_MAX_SO_BUFFERS];
 273       uint num_buffers;
 274    } so;
 275
 276    /* Clip derived state:
 277     */
 278    float plane[12][4];
 279    unsigned nr_planes;
 280    boolean depth_clamp;
 281
 282    /* If a prim stage introduces new vertex attributes, they'll be stored here
 283     */
 284    struct {
 285       uint num;
 286       uint semantic_name[10];
 287       uint semantic_index[10];
 288       uint slot[10];
 289    } extra_shader_outputs;
 290
 291    unsigned reduced_prim;
 292
 293    unsigned instance_id;
 294
 295 #ifdef HAVE_LLVM
 296    struct draw_llvm *llvm;
 297    struct gallivm_state *own_gallivm;
 298 #endif
 299
 300    struct pipe_sampler_view *sampler_views[PIPE_MAX_VERTEX_SAMPLERS];
 301    unsigned num_sampler_views;
 302    const struct pipe_sampler_state *samplers[PIPE_MAX_VERTEX_SAMPLERS];
 303    unsigned num_samplers;
 304
 305    void *driver_private;
 306 };
 307
 308
 309 struct draw_fetch_info {
 310    boolean linear;
 311    unsigned start;
 312    const unsigned *elts;
 313    unsigned count;
 314 };
 315
 316 struct draw_vertex_info {
 317    struct vertex_header *verts;
 318    unsigned vertex_size;
 319    unsigned stride;
 320    unsigned count;
 321 };
 322
 323 /* these flags are set if the primitive is a segment of a larger one */
 324 #define DRAW_SPLIT_BEFORE 0x1
 325 #define DRAW_SPLIT_AFTER  0x2
 326
 327 struct draw_prim_info {
 328    boolean linear;
 329    unsigned start;
 330
 331    const ushort *elts;
 332    unsigned count;
 333
 334    unsigned prim;
 335    unsigned flags;
 336    unsigned *primitive_lengths;
 337    unsigned primitive_count;
 338 };
 339
 340
 341 /*******************************************************************************
 342  * Draw common initialization code
 343  */
 344 boolean draw_init(struct draw_context *draw);
 345
 346 /*******************************************************************************
 347  * Vertex shader code:
 348  */
 349 boolean draw_vs_init( struct draw_context *draw );
 350 void draw_vs_destroy( struct draw_context *draw );
 351
 352 void draw_vs_set_viewport( struct draw_context *,
 353                            const struct pipe_viewport_state * );
 354
 355 void
 356 draw_vs_set_constants(struct draw_context *,
 357                       unsigned slot,
 358                       const void *constants,
 359                       unsigned size);
 360
 361
 362
 363 /*******************************************************************************
 364  * Geometry shading code:
 365  */
 366 boolean draw_gs_init( struct draw_context *draw );
 367
 368 void
 369 draw_gs_set_constants(struct draw_context *,
 370                       unsigned slot,
 371                       const void *constants,
 372                       unsigned size);
 373
 374 void draw_gs_destroy( struct draw_context *draw );
 375
 376 /*******************************************************************************
 377  * Common shading code:
 378  */
 379 uint draw_current_shader_outputs(const struct draw_context *draw);
 380 uint draw_current_shader_position_output(const struct draw_context *draw);
 381
 382 int draw_alloc_extra_vertex_attrib(struct draw_context *draw,
 383                                    uint semantic_name, uint semantic_index);
 384 void draw_remove_extra_vertex_attribs(struct draw_context *draw);
 385
 386
 387 /*******************************************************************************
 388  * Vertex processing (was passthrough) code:
 389  */
 390 boolean draw_pt_init( struct draw_context *draw );
 391 void draw_pt_destroy( struct draw_context *draw );
 392 void draw_pt_reset_vertex_ids( struct draw_context *draw );
 393
 394
 395 /*******************************************************************************
 396  * Primitive processing (pipeline) code:
 397  */
 398
 399 boolean draw_pipeline_init( struct draw_context *draw );
 400 void draw_pipeline_destroy( struct draw_context *draw );
 401
 402
 403
 404
 405
 406 /*
 407  * These flags are used by the pipeline when unfilled and/or line stipple modes
 408  * are operational.
 409  */
 410 #define DRAW_PIPE_EDGE_FLAG_0   0x1
 411 #define DRAW_PIPE_EDGE_FLAG_1   0x2
 412 #define DRAW_PIPE_EDGE_FLAG_2   0x4
 413 #define DRAW_PIPE_EDGE_FLAG_ALL 0x7
 414 #define DRAW_PIPE_RESET_STIPPLE 0x8
 415
 416 void draw_pipeline_run( struct draw_context *draw,
 417                         const struct draw_vertex_info *vert,
 418                         const struct draw_prim_info *prim);
 419
 420 void draw_pipeline_run_linear( struct draw_context *draw,
 421                                const struct draw_vertex_info *vert,
 422                                const struct draw_prim_info *prim);
 423
 424
 425
 426
 427 void draw_pipeline_flush( struct draw_context *draw,
 428                           unsigned flags );
 429
 430
 431
 432 /*******************************************************************************
 433  * Flushing
 434  */
 435
 436 #define DRAW_FLUSH_STATE_CHANGE              0x8
 437 #define DRAW_FLUSH_BACKEND                   0x10
 438
 439
 440 void draw_do_flush( struct draw_context *draw, unsigned flags );
 441
 442
 443
 444 void *
 445 draw_get_rasterizer_no_cull( struct draw_context *draw,
 446                              boolean scissor,
 447                              boolean flatshade );
 448
 449
 450 #endif /* DRAW_PRIVATE_H */