src/gallium/include/pipe/p_context.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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
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  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 VMWARE 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 #ifndef PIPE_CONTEXT_H
  29 #define PIPE_CONTEXT_H
  30
  31 #include "p_compiler.h"
  32 #include "p_format.h"
  33 #include "p_video_enums.h"
  34 #include "p_defines.h"
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40
  41 struct pipe_blend_color;
  42 struct pipe_blend_state;
  43 struct pipe_blit_info;
  44 struct pipe_box;
  45 struct pipe_clip_state;
  46 struct pipe_constant_buffer;
  47 struct pipe_depth_stencil_alpha_state;
  48 struct pipe_draw_info;
  49 struct pipe_fence_handle;
  50 struct pipe_framebuffer_state;
  51 struct pipe_index_buffer;
  52 struct pipe_query;
  53 struct pipe_poly_stipple;
  54 struct pipe_rasterizer_state;
  55 struct pipe_resolve_info;
  56 struct pipe_resource;
  57 struct pipe_sampler_state;
  58 struct pipe_sampler_view;
  59 struct pipe_scissor_state;
  60 struct pipe_shader_state;
  61 struct pipe_stencil_ref;
  62 struct pipe_stream_output_target;
  63 struct pipe_surface;
  64 struct pipe_transfer;
  65 struct pipe_vertex_buffer;
  66 struct pipe_vertex_element;
  67 struct pipe_video_buffer;
  68 struct pipe_video_codec;
  69 struct pipe_viewport_state;
  70 struct pipe_compute_state;
  71 union pipe_color_union;
  72 union pipe_query_result;
  73
  74 /**
  75  * Gallium rendering context.  Basically:
  76  *  - state setting functions
  77  *  - VBO drawing functions
  78  *  - surface functions
  79  */
  80 struct pipe_context {
  81    struct pipe_screen *screen;
  82
  83    void *priv;  /**< context private data (for DRI for example) */
  84    void *draw;  /**< private, for draw module (temporary?) */
  85
  86    void (*destroy)( struct pipe_context * );
  87
  88    /**
  89     * VBO drawing
  90     */
  91    /*@{*/
  92    void (*draw_vbo)( struct pipe_context *pipe,
  93                      const struct pipe_draw_info *info );
  94    /*@}*/
  95
  96    /**
  97     * Predicate subsequent rendering on occlusion query result
  98     * \param query  the query predicate, or NULL if no predicate
  99     * \param condition whether to skip on FALSE or TRUE query results
 100     * \param mode  one of PIPE_RENDER_COND_x
 101     */
 102    void (*render_condition)( struct pipe_context *pipe,
 103                              struct pipe_query *query,
 104                              boolean condition,
 105                              uint mode );
 106
 107    /**
 108     * Query objects
 109     */
 110    /*@{*/
 111    struct pipe_query *(*create_query)( struct pipe_context *pipe,
 112                                        unsigned query_type,
 113                                        unsigned index );
 114
 115    void (*destroy_query)(struct pipe_context *pipe,
 116                          struct pipe_query *q);
 117
 118    boolean (*begin_query)(struct pipe_context *pipe, struct pipe_query *q);
 119    void (*end_query)(struct pipe_context *pipe, struct pipe_query *q);
 120
 121    /**
 122     * Get results of a query.
 123     * \param wait  if true, this query will block until the result is ready
 124     * \return TRUE if results are ready, FALSE otherwise
 125     */
 126    boolean (*get_query_result)(struct pipe_context *pipe,
 127                                struct pipe_query *q,
 128                                boolean wait,
 129                                union pipe_query_result *result);
 130    /*@}*/
 131
 132    /**
 133     * State functions (create/bind/destroy state objects)
 134     */
 135    /*@{*/
 136    void * (*create_blend_state)(struct pipe_context *,
 137                                 const struct pipe_blend_state *);
 138    void   (*bind_blend_state)(struct pipe_context *, void *);
 139    void   (*delete_blend_state)(struct pipe_context *, void  *);
 140
 141    void * (*create_sampler_state)(struct pipe_context *,
 142                                   const struct pipe_sampler_state *);
 143    void   (*bind_sampler_states)(struct pipe_context *,
 144                                  unsigned shader, unsigned start_slot,
 145                                  unsigned num_samplers, void **samplers);
 146    void   (*delete_sampler_state)(struct pipe_context *, void *);
 147
 148    void * (*create_rasterizer_state)(struct pipe_context *,
 149                                      const struct pipe_rasterizer_state *);
 150    void   (*bind_rasterizer_state)(struct pipe_context *, void *);
 151    void   (*delete_rasterizer_state)(struct pipe_context *, void *);
 152
 153    void * (*create_depth_stencil_alpha_state)(struct pipe_context *,
 154                                         const struct pipe_depth_stencil_alpha_state *);
 155    void   (*bind_depth_stencil_alpha_state)(struct pipe_context *, void *);
 156    void   (*delete_depth_stencil_alpha_state)(struct pipe_context *, void *);
 157
 158    void * (*create_fs_state)(struct pipe_context *,
 159                              const struct pipe_shader_state *);
 160    void   (*bind_fs_state)(struct pipe_context *, void *);
 161    void   (*delete_fs_state)(struct pipe_context *, void *);
 162
 163    void * (*create_vs_state)(struct pipe_context *,
 164                              const struct pipe_shader_state *);
 165    void   (*bind_vs_state)(struct pipe_context *, void *);
 166    void   (*delete_vs_state)(struct pipe_context *, void *);
 167
 168    void * (*create_gs_state)(struct pipe_context *,
 169                              const struct pipe_shader_state *);
 170    void   (*bind_gs_state)(struct pipe_context *, void *);
 171    void   (*delete_gs_state)(struct pipe_context *, void *);
 172
 173    void * (*create_tcs_state)(struct pipe_context *,
 174                               const struct pipe_shader_state *);
 175    void   (*bind_tcs_state)(struct pipe_context *, void *);
 176    void   (*delete_tcs_state)(struct pipe_context *, void *);
 177
 178    void * (*create_tes_state)(struct pipe_context *,
 179                               const struct pipe_shader_state *);
 180    void   (*bind_tes_state)(struct pipe_context *, void *);
 181    void   (*delete_tes_state)(struct pipe_context *, void *);
 182
 183    void * (*create_vertex_elements_state)(struct pipe_context *,
 184                                           unsigned num_elements,
 185                                           const struct pipe_vertex_element *);
 186    void   (*bind_vertex_elements_state)(struct pipe_context *, void *);
 187    void   (*delete_vertex_elements_state)(struct pipe_context *, void *);
 188
 189    /*@}*/
 190
 191    /**
 192     * Parameter-like state (or properties)
 193     */
 194    /*@{*/
 195    void (*set_blend_color)( struct pipe_context *,
 196                             const struct pipe_blend_color * );
 197
 198    void (*set_stencil_ref)( struct pipe_context *,
 199                             const struct pipe_stencil_ref * );
 200
 201    void (*set_sample_mask)( struct pipe_context *,
 202                             unsigned sample_mask );
 203
 204    void (*set_min_samples)( struct pipe_context *,
 205                             unsigned min_samples );
 206
 207    void (*set_clip_state)( struct pipe_context *,
 208                             const struct pipe_clip_state * );
 209
 210    void (*set_constant_buffer)( struct pipe_context *,
 211                                 uint shader, uint index,
 212                                 struct pipe_constant_buffer *buf );
 213
 214    void (*set_framebuffer_state)( struct pipe_context *,
 215                                   const struct pipe_framebuffer_state * );
 216
 217    void (*set_polygon_stipple)( struct pipe_context *,
 218                                 const struct pipe_poly_stipple * );
 219
 220    void (*set_scissor_states)( struct pipe_context *,
 221                                unsigned start_slot,
 222                                unsigned num_scissors,
 223                                const struct pipe_scissor_state * );
 224
 225    void (*set_viewport_states)( struct pipe_context *,
 226                                 unsigned start_slot,
 227                                 unsigned num_viewports,
 228                                 const struct pipe_viewport_state *);
 229
 230    void (*set_sampler_views)(struct pipe_context *, unsigned shader,
 231                              unsigned start_slot, unsigned num_views,
 232                              struct pipe_sampler_view **);
 233
 234    void (*set_tess_state)(struct pipe_context *,
 235                           const float default_outer_level[4],
 236                           const float default_inner_level[2]);
 237
 238    /**
 239     * Bind an array of shader resources that will be used by the
 240     * graphics pipeline.  Any resources that were previously bound to
 241     * the specified range will be unbound after this call.
 242     *
 243     * \param start      first resource to bind.
 244     * \param count      number of consecutive resources to bind.
 245     * \param resources  array of pointers to the resources to bind, it
 246     *                   should contain at least \a count elements
 247     *                   unless it's NULL, in which case no new
 248     *                   resources will be bound.
 249     */
 250    void (*set_shader_resources)(struct pipe_context *,
 251                                 unsigned start, unsigned count,
 252                                 struct pipe_surface **resources);
 253
 254    void (*set_vertex_buffers)( struct pipe_context *,
 255                                unsigned start_slot,
 256                                unsigned num_buffers,
 257                                const struct pipe_vertex_buffer * );
 258
 259    void (*set_index_buffer)( struct pipe_context *pipe,
 260                              const struct pipe_index_buffer * );
 261
 262    /*@}*/
 263
 264    /**
 265     * Stream output functions.
 266     */
 267    /*@{*/
 268
 269    struct pipe_stream_output_target *(*create_stream_output_target)(
 270                         struct pipe_context *,
 271                         struct pipe_resource *,
 272                         unsigned buffer_offset,
 273                         unsigned buffer_size);
 274
 275    void (*stream_output_target_destroy)(struct pipe_context *,
 276                                         struct pipe_stream_output_target *);
 277
 278    void (*set_stream_output_targets)(struct pipe_context *,
 279                               unsigned num_targets,
 280                               struct pipe_stream_output_target **targets,
 281                               const unsigned *offsets);
 282
 283    /*@}*/
 284
 285
 286    /**
 287     * Resource functions for blit-like functionality
 288     *
 289     * If a driver supports multisampling, blit must implement color resolve.
 290     */
 291    /*@{*/
 292
 293    /**
 294     * Copy a block of pixels from one resource to another.
 295     * The resource must be of the same format.
 296     * Resources with nr_samples > 1 are not allowed.
 297     */
 298    void (*resource_copy_region)(struct pipe_context *pipe,
 299                                 struct pipe_resource *dst,
 300                                 unsigned dst_level,
 301                                 unsigned dstx, unsigned dsty, unsigned dstz,
 302                                 struct pipe_resource *src,
 303                                 unsigned src_level,
 304                                 const struct pipe_box *src_box);
 305
 306    /* Optimal hardware path for blitting pixels.
 307     * Scaling, format conversion, up- and downsampling (resolve) are allowed.
 308     */
 309    void (*blit)(struct pipe_context *pipe,
 310                 const struct pipe_blit_info *info);
 311
 312    /*@}*/
 313
 314    /**
 315     * Clear the specified set of currently bound buffers to specified values.
 316     * The entire buffers are cleared (no scissor, no colormask, etc).
 317     *
 318     * \param buffers  bitfield of PIPE_CLEAR_* values.
 319     * \param color  pointer to a union of fiu array for each of r, g, b, a.
 320     * \param depth  depth clear value in [0,1].
 321     * \param stencil  stencil clear value
 322     */
 323    void (*clear)(struct pipe_context *pipe,
 324                  unsigned buffers,
 325                  const union pipe_color_union *color,
 326                  double depth,
 327                  unsigned stencil);
 328
 329    /**
 330     * Clear a color rendertarget surface.
 331     * \param color  pointer to an union of fiu array for each of r, g, b, a.
 332     */
 333    void (*clear_render_target)(struct pipe_context *pipe,
 334                                struct pipe_surface *dst,
 335                                const union pipe_color_union *color,
 336                                unsigned dstx, unsigned dsty,
 337                                unsigned width, unsigned height);
 338
 339    /**
 340     * Clear a depth-stencil surface.
 341     * \param clear_flags  bitfield of PIPE_CLEAR_DEPTH/STENCIL values.
 342     * \param depth  depth clear value in [0,1].
 343     * \param stencil  stencil clear value
 344     */
 345    void (*clear_depth_stencil)(struct pipe_context *pipe,
 346                                struct pipe_surface *dst,
 347                                unsigned clear_flags,
 348                                double depth,
 349                                unsigned stencil,
 350                                unsigned dstx, unsigned dsty,
 351                                unsigned width, unsigned height);
 352
 353    /**
 354     * Clear a buffer. Runs a memset over the specified region with the element
 355     * value passed in through clear_value of size clear_value_size.
 356     */
 357    void (*clear_buffer)(struct pipe_context *pipe,
 358                         struct pipe_resource *res,
 359                         unsigned offset,
 360                         unsigned size,
 361                         const void *clear_value,
 362                         int clear_value_size);
 363
 364    /** Flush draw commands
 365     *
 366     * \param flags  bitfield of enum pipe_flush_flags values.
 367     */
 368    void (*flush)(struct pipe_context *pipe,
 369                  struct pipe_fence_handle **fence,
 370                  unsigned flags);
 371
 372    /**
 373     * Create a view on a texture to be used by a shader stage.
 374     */
 375    struct pipe_sampler_view * (*create_sampler_view)(struct pipe_context *ctx,
 376                                                      struct pipe_resource *texture,
 377                                                      const struct pipe_sampler_view *templat);
 378
 379    void (*sampler_view_destroy)(struct pipe_context *ctx,
 380                                 struct pipe_sampler_view *view);
 381
 382
 383    /**
 384     * Get a surface which is a "view" into a resource, used by
 385     * render target / depth stencil stages.
 386     */
 387    struct pipe_surface *(*create_surface)(struct pipe_context *ctx,
 388                                           struct pipe_resource *resource,
 389                                           const struct pipe_surface *templat);
 390
 391    void (*surface_destroy)(struct pipe_context *ctx,
 392                            struct pipe_surface *);
 393
 394    /**
 395     * Map a resource.
 396     *
 397     * Transfers are (by default) context-private and allow uploads to be
 398     * interleaved with rendering.
 399     *
 400     * out_transfer will contain the transfer object that must be passed
 401     * to all the other transfer functions. It also contains useful
 402     * information (like texture strides).
 403     */
 404    void *(*transfer_map)(struct pipe_context *,
 405                          struct pipe_resource *resource,
 406                          unsigned level,
 407                          unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 408                          const struct pipe_box *,
 409                          struct pipe_transfer **out_transfer);
 410
 411    /* If transfer was created with WRITE|FLUSH_EXPLICIT, only the
 412     * regions specified with this call are guaranteed to be written to
 413     * the resource.
 414     */
 415    void (*transfer_flush_region)( struct pipe_context *,
 416                                   struct pipe_transfer *transfer,
 417                                   const struct pipe_box *);
 418
 419    void (*transfer_unmap)(struct pipe_context *,
 420                           struct pipe_transfer *transfer);
 421
 422    /* One-shot transfer operation with data supplied in a user
 423     * pointer.  XXX: strides??
 424     */
 425    void (*transfer_inline_write)( struct pipe_context *,
 426                                   struct pipe_resource *,
 427                                   unsigned level,
 428                                   unsigned usage, /* a combination of PIPE_TRANSFER_x */
 429                                   const struct pipe_box *,
 430                                   const void *data,
 431                                   unsigned stride,
 432                                   unsigned layer_stride);
 433
 434    /**
 435     * Flush any pending framebuffer writes and invalidate texture caches.
 436     */
 437    void (*texture_barrier)(struct pipe_context *);
 438
 439    /**
 440     * Flush caches according to flags.
 441     */
 442    void (*memory_barrier)(struct pipe_context *, unsigned flags);
 443
 444    /**
 445     * Creates a video codec for a specific video format/profile
 446     */
 447    struct pipe_video_codec *(*create_video_codec)( struct pipe_context *context,
 448                                                    const struct pipe_video_codec *templat );
 449
 450    /**
 451     * Creates a video buffer as decoding target
 452     */
 453    struct pipe_video_buffer *(*create_video_buffer)( struct pipe_context *context,
 454                                                      const struct pipe_video_buffer *templat );
 455
 456    /**
 457     * Compute kernel execution
 458     */
 459    /*@{*/
 460    /**
 461     * Define the compute program and parameters to be used by
 462     * pipe_context::launch_grid.
 463     */
 464    void *(*create_compute_state)(struct pipe_context *context,
 465                                  const struct pipe_compute_state *);
 466    void (*bind_compute_state)(struct pipe_context *, void *);
 467    void (*delete_compute_state)(struct pipe_context *, void *);
 468
 469    /**
 470     * Bind an array of shader resources that will be used by the
 471     * compute program.  Any resources that were previously bound to
 472     * the specified range will be unbound after this call.
 473     *
 474     * \param start      first resource to bind.
 475     * \param count      number of consecutive resources to bind.
 476     * \param resources  array of pointers to the resources to bind, it
 477     *                   should contain at least \a count elements
 478     *                   unless it's NULL, in which case no new
 479     *                   resources will be bound.
 480     */
 481    void (*set_compute_resources)(struct pipe_context *,
 482                                  unsigned start, unsigned count,
 483                                  struct pipe_surface **resources);
 484
 485    /**
 486     * Bind an array of buffers to be mapped into the address space of
 487     * the GLOBAL resource.  Any buffers that were previously bound
 488     * between [first, first + count - 1] are unbound after this call.
 489     *
 490     * \param first      first buffer to map.
 491     * \param count      number of consecutive buffers to map.
 492     * \param resources  array of pointers to the buffers to map, it
 493     *                   should contain at least \a count elements
 494     *                   unless it's NULL, in which case no new
 495     *                   resources will be bound.
 496     * \param handles    array of pointers to the memory locations that
 497     *                   will be updated with the address each buffer
 498     *                   will be mapped to.  The base memory address of
 499     *                   each of the buffers will be added to the value
 500     *                   pointed to by its corresponding handle to form
 501     *                   the final address argument.  It should contain
 502     *                   at least \a count elements, unless \a
 503     *                   resources is NULL in which case \a handles
 504     *                   should be NULL as well.
 505     *
 506     * Note that the driver isn't required to make any guarantees about
 507     * the contents of the \a handles array being valid anytime except
 508     * during the subsequent calls to pipe_context::launch_grid.  This
 509     * means that the only sensible location handles[i] may point to is
 510     * somewhere within the INPUT buffer itself.  This is so to
 511     * accommodate implementations that lack virtual memory but
 512     * nevertheless migrate buffers on the fly, leading to resource
 513     * base addresses that change on each kernel invocation or are
 514     * unknown to the pipe driver.
 515     */
 516    void (*set_global_binding)(struct pipe_context *context,
 517                               unsigned first, unsigned count,
 518                               struct pipe_resource **resources,
 519                               uint32_t **handles);
 520
 521    /**
 522     * Launch the compute kernel starting from instruction \a pc of the
 523     * currently bound compute program.
 524     *
 525     * \a grid_layout and \a block_layout are arrays of size \a
 526     * PIPE_COMPUTE_CAP_GRID_DIMENSION that determine the layout of the
 527     * grid (in block units) and working block (in thread units) to be
 528     * used, respectively.
 529     *
 530     * \a pc For drivers that use PIPE_SHADER_IR_LLVM as their prefered IR,
 531     * this value will be the index of the kernel in the opencl.kernels
 532     * metadata list.
 533     *
 534     * \a input will be used to initialize the INPUT resource, and it
 535     * should point to a buffer of at least
 536     * pipe_compute_state::req_input_mem bytes.
 537     */
 538    void (*launch_grid)(struct pipe_context *context,
 539                        const uint *block_layout, const uint *grid_layout,
 540                        uint32_t pc, const void *input);
 541    /*@}*/
 542
 543    /**
 544     * Get sample position for an individual sample point.
 545     *
 546     * \param sample_count - total number of samples
 547     * \param sample_index - sample to get the position values for
 548     * \param out_value - return value of 2 floats for x and y position for
 549     *                    requested sample.
 550     */
 551    void (*get_sample_position)(struct pipe_context *context,
 552                                unsigned sample_count,
 553                                unsigned sample_index,
 554                                float *out_value);
 555
 556    /**
 557     * Flush the resource cache, so that the resource can be used
 558     * by an external client. Possible usage:
 559     * - flushing a resource before presenting it on the screen
 560     * - flushing a resource if some other process or device wants to use it
 561     * This shouldn't be used to flush caches if the resource is only managed
 562     * by a single pipe_screen and is not shared with another process.
 563     * (i.e. you shouldn't use it to flush caches explicitly if you want to e.g.
 564     * use the resource for texturing)
 565     */
 566    void (*flush_resource)(struct pipe_context *ctx,
 567                           struct pipe_resource *resource);
 568
 569    /**
 570     * Invalidate the contents of the resource.
 571     *
 572     * This is used to implement EGL's semantic of undefined depth/stencil
 573     * contenst after a swapbuffers.  This allows a tiled renderer (for
 574     * example) to not store the depth buffer.
 575     */
 576    void (*invalidate_resource)(struct pipe_context *ctx,
 577                                struct pipe_resource *resource);
 578
 579    /**
 580     * Return information about unexpected device resets.
 581     */
 582    enum pipe_reset_status (*get_device_reset_status)(struct pipe_context *ctx);
 583 };
 584
 585
 586 #ifdef __cplusplus
 587 }
 588 #endif
 589
 590 #endif /* PIPE_CONTEXT_H */