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 *vcache;
 144          struct draw_pt_front_end *varray;
 145       } front;
 146
 147       struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
 148       unsigned nr_vertex_buffers;
 149
 150       struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
 151       unsigned nr_vertex_elements;
 152
 153       /* user-space vertex data, buffers */
 154       struct {
 155          /** vertex element/index buffer (ex: glDrawElements) */
 156          const void *elts;
 157          /** bytes per index (0, 1, 2 or 4) */
 158          unsigned eltSize;
 159          int eltBias;
 160          unsigned min_index;
 161          unsigned max_index;
 162
 163          /** vertex arrays */
 164          const void *vbuffer[PIPE_MAX_ATTRIBS];
 165
 166          /** constant buffers (for vertex/geometry shader) */
 167          const void *vs_constants[PIPE_MAX_CONSTANT_BUFFERS];
 168          unsigned vs_constants_size[PIPE_MAX_CONSTANT_BUFFERS];
 169          const void *gs_constants[PIPE_MAX_CONSTANT_BUFFERS];
 170          unsigned gs_constants_size[PIPE_MAX_CONSTANT_BUFFERS];
 171       } user;
 172
 173       boolean test_fse;         /* enable FSE even though its not correct (eg for softpipe) */
 174       boolean no_fse;           /* disable FSE even when it is correct */
 175    } pt;
 176
 177    struct {
 178       boolean bypass_clipping;
 179       boolean bypass_vs;
 180    } driver;
 181
 182    boolean flushing;         /**< debugging/sanity */
 183    boolean suspend_flushing; /**< internally set */
 184    boolean bypass_clipping;  /**< set if either api or driver bypass_clipping true */
 185
 186    boolean force_passthrough; /**< never clip or shade */
 187
 188    boolean dump_vs;
 189
 190    double mrd;  /**< minimum resolvable depth value, for polygon offset */
 191
 192    /** Current rasterizer state given to us by the driver */
 193    const struct pipe_rasterizer_state *rasterizer;
 194    /** Driver CSO handle for the current rasterizer state */
 195    void *rast_handle;
 196
 197    /** Rasterizer CSOs without culling/stipple/etc */
 198    void *rasterizer_no_cull[2][2];
 199
 200    struct pipe_viewport_state viewport;
 201    boolean identity_viewport;
 202
 203    /** Vertex shader state */
 204    struct {
 205       struct draw_vertex_shader *vertex_shader;
 206       uint num_vs_outputs;  /**< convenience, from vertex_shader */
 207       uint position_output;
 208       uint edgeflag_output;
 209
 210       /** TGSI program interpreter runtime state */
 211       struct tgsi_exec_machine *machine;
 212
 213       uint num_samplers;
 214       struct tgsi_sampler **samplers;
 215
 216       /* Here's another one:
 217        */
 218       struct aos_machine *aos_machine;
 219
 220
 221       const void *aligned_constants[PIPE_MAX_CONSTANT_BUFFERS];
 222
 223       const void *aligned_constant_storage[PIPE_MAX_CONSTANT_BUFFERS];
 224       unsigned const_storage_size[PIPE_MAX_CONSTANT_BUFFERS];
 225
 226
 227       struct translate *fetch;
 228       struct translate_cache *fetch_cache;
 229       struct translate *emit;
 230       struct translate_cache *emit_cache;
 231    } vs;
 232
 233    /** Geometry shader state */
 234    struct {
 235       struct draw_geometry_shader *geometry_shader;
 236       uint num_gs_outputs;  /**< convenience, from geometry_shader */
 237       uint position_output;
 238
 239       /** TGSI program interpreter runtime state */
 240       struct tgsi_exec_machine *machine;
 241
 242       uint num_samplers;
 243       struct tgsi_sampler **samplers;
 244    } gs;
 245
 246    /** Stream output (vertex feedback) state */
 247    struct {
 248       struct pipe_stream_output_state state;
 249       void *buffers[PIPE_MAX_SO_BUFFERS];
 250       uint num_buffers;
 251    } so;
 252
 253    /* Clip derived state:
 254     */
 255    float plane[12][4];
 256    unsigned nr_planes;
 257    boolean depth_clamp;
 258
 259    /* If a prim stage introduces new vertex attributes, they'll be stored here
 260     */
 261    struct {
 262       uint semantic_name;
 263       uint semantic_index;
 264       int slot;
 265    } extra_shader_outputs;
 266
 267    unsigned reduced_prim;
 268
 269    unsigned instance_id;
 270
 271 #ifdef HAVE_LLVM
 272    struct draw_llvm *llvm;
 273    LLVMExecutionEngineRef engine;
 274 #endif
 275
 276    struct pipe_sampler_view *sampler_views[PIPE_MAX_VERTEX_SAMPLERS];
 277    unsigned num_sampler_views;
 278    const struct pipe_sampler_state *samplers[PIPE_MAX_VERTEX_SAMPLERS];
 279    unsigned num_samplers;
 280
 281    void *driver_private;
 282 };
 283
 284
 285 struct draw_fetch_info {
 286    boolean linear;
 287    unsigned start;
 288    const unsigned *elts;
 289    unsigned count;
 290 };
 291
 292 struct draw_vertex_info {
 293    struct vertex_header *verts;
 294    unsigned vertex_size;
 295    unsigned stride;
 296    unsigned count;
 297 };
 298
 299 /* these flags are set if the primitive is a segment of a larger one */
 300 #define DRAW_SPLIT_BEFORE 0x1
 301 #define DRAW_SPLIT_AFTER  0x2
 302
 303 struct draw_prim_info {
 304    boolean linear;
 305    unsigned start;
 306
 307    const ushort *elts;
 308    unsigned count;
 309
 310    unsigned prim;
 311    unsigned flags;
 312    unsigned *primitive_lengths;
 313    unsigned primitive_count;
 314 };
 315
 316
 317 /*******************************************************************************
 318  * Draw common initialization code
 319  */
 320 boolean draw_init(struct draw_context *draw);
 321
 322 /*******************************************************************************
 323  * Vertex shader code:
 324  */
 325 boolean draw_vs_init( struct draw_context *draw );
 326 void draw_vs_destroy( struct draw_context *draw );
 327
 328 void draw_vs_set_viewport( struct draw_context *,
 329                            const struct pipe_viewport_state * );
 330
 331 void
 332 draw_vs_set_constants(struct draw_context *,
 333                       unsigned slot,
 334                       const void *constants,
 335                       unsigned size);
 336
 337
 338
 339 /*******************************************************************************
 340  * Geometry shading code:
 341  */
 342 boolean draw_gs_init( struct draw_context *draw );
 343
 344 void
 345 draw_gs_set_constants(struct draw_context *,
 346                       unsigned slot,
 347                       const void *constants,
 348                       unsigned size);
 349
 350 void draw_gs_destroy( struct draw_context *draw );
 351
 352 /*******************************************************************************
 353  * Common shading code:
 354  */
 355 uint draw_current_shader_outputs(const struct draw_context *draw);
 356 uint draw_current_shader_position_output(const struct draw_context *draw);
 357
 358 /*******************************************************************************
 359  * Vertex processing (was passthrough) code:
 360  */
 361 boolean draw_pt_init( struct draw_context *draw );
 362 void draw_pt_destroy( struct draw_context *draw );
 363 void draw_pt_reset_vertex_ids( struct draw_context *draw );
 364
 365
 366 /*******************************************************************************
 367  * Primitive processing (pipeline) code:
 368  */
 369
 370 boolean draw_pipeline_init( struct draw_context *draw );
 371 void draw_pipeline_destroy( struct draw_context *draw );
 372
 373
 374
 375
 376
 377 /* We use the top few bits in the elts[] parameter to convey a little
 378  * API information.  This limits the number of vertices we can address
 379  * to only 4096 -- if that becomes a problem, we can switch to 32-bit
 380  * draw indices.
 381  *
 382  * These flags expected at first vertex of lines & triangles when
 383  * unfilled and/or line stipple modes are operational.
 384  */
 385 #define DRAW_PIPE_MAX_VERTICES  (0x1<<12)
 386 #define DRAW_PIPE_EDGE_FLAG_0   (0x1<<12)
 387 #define DRAW_PIPE_EDGE_FLAG_1   (0x2<<12)
 388 #define DRAW_PIPE_EDGE_FLAG_2   (0x4<<12)
 389 #define DRAW_PIPE_EDGE_FLAG_ALL (0x7<<12)
 390 #define DRAW_PIPE_RESET_STIPPLE (0x8<<12)
 391 #define DRAW_PIPE_FLAG_MASK     (0xf<<12)
 392
 393 void draw_pipeline_run( struct draw_context *draw,
 394                         const struct draw_vertex_info *vert,
 395                         const struct draw_prim_info *prim);
 396
 397 void draw_pipeline_run_linear( struct draw_context *draw,
 398                                const struct draw_vertex_info *vert,
 399                                const struct draw_prim_info *prim);
 400
 401
 402
 403
 404 void draw_pipeline_flush( struct draw_context *draw,
 405                           unsigned flags );
 406
 407
 408
 409 /*******************************************************************************
 410  * Flushing
 411  */
 412
 413 #define DRAW_FLUSH_STATE_CHANGE              0x8
 414 #define DRAW_FLUSH_BACKEND                   0x10
 415
 416
 417 void draw_do_flush( struct draw_context *draw, unsigned flags );
 418
 419
 420
 421 void *
 422 draw_get_rasterizer_no_cull( struct draw_context *draw,
 423                              boolean scissor,
 424                              boolean flatshade );
 425
 426
 427 #endif /* DRAW_PRIVATE_H */