src/gallium/include/pipe/p_context.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 #ifndef PIPE_CONTEXT_H
  29 #define PIPE_CONTEXT_H
  30
  31 #include "p_state.h"
  32
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38
  39 struct pipe_screen;
  40 struct pipe_fence_handle;
  41 struct pipe_state_cache;
  42 struct pipe_query;
  43 struct pipe_winsys;
  44
  45 /**
  46  * Gallium rendering context.  Basically:
  47  *  - state setting functions
  48  *  - VBO drawing functions
  49  *  - surface functions
  50  */
  51 struct pipe_context {
  52    struct pipe_winsys *winsys;
  53    struct pipe_screen *screen;
  54
  55    void *priv;  /**< context private data (for DRI for example) */
  56    void *draw;  /**< private, for draw module (temporary?) */
  57
  58    void (*destroy)( struct pipe_context * );
  59
  60    /**
  61     * VBO drawing
  62     */
  63    /*@{*/
  64    void (*draw_arrays)( struct pipe_context *pipe,
  65                         unsigned mode, unsigned start, unsigned count);
  66
  67    void (*draw_elements)( struct pipe_context *pipe,
  68                           struct pipe_resource *indexBuffer,
  69                           unsigned indexSize,
  70                           int indexBias,
  71                           unsigned mode, unsigned start, unsigned count);
  72
  73    void (*draw_arrays_instanced)(struct pipe_context *pipe,
  74                                  unsigned mode,
  75                                  unsigned start,
  76                                  unsigned count,
  77                                  unsigned startInstance,
  78                                  unsigned instanceCount);
  79
  80    void (*draw_elements_instanced)(struct pipe_context *pipe,
  81                                    struct pipe_resource *indexBuffer,
  82                                    unsigned indexSize,
  83                                    int indexBias,
  84                                    unsigned mode,
  85                                    unsigned start,
  86                                    unsigned count,
  87                                    unsigned startInstance,
  88                                    unsigned instanceCount);
  89
  90    /* XXX: this is (probably) a temporary entrypoint, as the range
  91     * information should be available from the vertex_buffer state.
  92     * Using this to quickly evaluate a specialized path in the draw
  93     * module.
  94     */
  95    void (*draw_range_elements)( struct pipe_context *pipe,
  96                                 struct pipe_resource *indexBuffer,
  97                                 unsigned indexSize,
  98                                 int indexBias,
  99                                 unsigned minIndex,
 100                                 unsigned maxIndex,
 101                                 unsigned mode,
 102                                 unsigned start,
 103                                 unsigned count);
 104    /*@}*/
 105
 106    /**
 107     * Predicate subsequent rendering on occlusion query result
 108     * \param query  the query predicate, or NULL if no predicate
 109     * \param mode  one of PIPE_RENDER_COND_x
 110     */
 111    void (*render_condition)( struct pipe_context *pipe,
 112                              struct pipe_query *query,
 113                              uint mode );
 114
 115    /**
 116     * Query objects
 117     */
 118    /*@{*/
 119    struct pipe_query *(*create_query)( struct pipe_context *pipe,
 120                                        unsigned query_type );
 121
 122    void (*destroy_query)(struct pipe_context *pipe,
 123                          struct pipe_query *q);
 124
 125    void (*begin_query)(struct pipe_context *pipe, struct pipe_query *q);
 126    void (*end_query)(struct pipe_context *pipe, struct pipe_query *q);
 127
 128    /**
 129     * Get results of a query.
 130     * \param wait  if true, this query will block until the result is ready
 131     * \return TRUE if results are ready, FALSE otherwise
 132     */
 133    boolean (*get_query_result)(struct pipe_context *pipe,
 134                                struct pipe_query *q,
 135                                boolean wait,
 136                                uint64_t *result);
 137    /*@}*/
 138
 139    /**
 140     * State functions (create/bind/destroy state objects)
 141     */
 142    /*@{*/
 143    void * (*create_blend_state)(struct pipe_context *,
 144                                 const struct pipe_blend_state *);
 145    void   (*bind_blend_state)(struct pipe_context *, void *);
 146    void   (*delete_blend_state)(struct pipe_context *, void  *);
 147
 148    void * (*create_sampler_state)(struct pipe_context *,
 149                                   const struct pipe_sampler_state *);
 150    void   (*bind_fragment_sampler_states)(struct pipe_context *,
 151                                           unsigned num_samplers,
 152                                           void **samplers);
 153    void   (*bind_vertex_sampler_states)(struct pipe_context *,
 154                                         unsigned num_samplers,
 155                                         void **samplers);
 156    void   (*delete_sampler_state)(struct pipe_context *, void *);
 157
 158    void * (*create_rasterizer_state)(struct pipe_context *,
 159                                      const struct pipe_rasterizer_state *);
 160    void   (*bind_rasterizer_state)(struct pipe_context *, void *);
 161    void   (*delete_rasterizer_state)(struct pipe_context *, void *);
 162
 163    void * (*create_depth_stencil_alpha_state)(struct pipe_context *,
 164                                         const struct pipe_depth_stencil_alpha_state *);
 165    void   (*bind_depth_stencil_alpha_state)(struct pipe_context *, void *);
 166    void   (*delete_depth_stencil_alpha_state)(struct pipe_context *, void *);
 167
 168    void * (*create_fs_state)(struct pipe_context *,
 169                              const struct pipe_shader_state *);
 170    void   (*bind_fs_state)(struct pipe_context *, void *);
 171    void   (*delete_fs_state)(struct pipe_context *, void *);
 172
 173    void * (*create_vs_state)(struct pipe_context *,
 174                              const struct pipe_shader_state *);
 175    void   (*bind_vs_state)(struct pipe_context *, void *);
 176    void   (*delete_vs_state)(struct pipe_context *, void *);
 177
 178    void * (*create_gs_state)(struct pipe_context *,
 179                              const struct pipe_shader_state *);
 180    void   (*bind_gs_state)(struct pipe_context *, void *);
 181    void   (*delete_gs_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_clip_state)( struct pipe_context *,
 202                             const struct pipe_clip_state * );
 203
 204    void (*set_constant_buffer)( struct pipe_context *,
 205                                 uint shader, uint index,
 206                                 struct pipe_resource *buf );
 207
 208    void (*set_framebuffer_state)( struct pipe_context *,
 209                                   const struct pipe_framebuffer_state * );
 210
 211    void (*set_polygon_stipple)( struct pipe_context *,
 212                                 const struct pipe_poly_stipple * );
 213
 214    void (*set_scissor_state)( struct pipe_context *,
 215                               const struct pipe_scissor_state * );
 216
 217    void (*set_viewport_state)( struct pipe_context *,
 218                                const struct pipe_viewport_state * );
 219
 220    void (*set_fragment_sampler_views)(struct pipe_context *,
 221                                       unsigned num_views,
 222                                       struct pipe_sampler_view **);
 223
 224    void (*set_vertex_sampler_views)(struct pipe_context *,
 225                                     unsigned num_views,
 226                                     struct pipe_sampler_view **);
 227
 228    void (*set_vertex_buffers)( struct pipe_context *,
 229                                unsigned num_buffers,
 230                                const struct pipe_vertex_buffer * );
 231
 232    /*@}*/
 233
 234
 235    /**
 236     * Surface functions
 237     *
 238     * The pipe driver is allowed to set these functions to NULL, and in that
 239     * case, they will not be available.
 240     */
 241    /*@{*/
 242
 243    /**
 244     * Copy a block of pixels from one surface to another.
 245     * The surfaces must be of the same format.
 246     */
 247    void (*surface_copy)(struct pipe_context *pipe,
 248                         struct pipe_surface *dest,
 249                         unsigned destx, unsigned desty,
 250                         struct pipe_surface *src,
 251                         unsigned srcx, unsigned srcy,
 252                         unsigned width, unsigned height);
 253
 254    /**
 255     * Fill a region of a surface with a constant value.
 256     */
 257    void (*surface_fill)(struct pipe_context *pipe,
 258                         struct pipe_surface *dst,
 259                         unsigned dstx, unsigned dsty,
 260                         unsigned width, unsigned height,
 261                         unsigned value);
 262    /*@}*/
 263
 264    /**
 265     * Clear the specified set of currently bound buffers to specified values.
 266     * The entire buffers are cleared (no scissor, no colormask, etc).
 267     *
 268     * \param buffers  bitfield of PIPE_CLEAR_* values.
 269     * \param rgba  pointer to an array of one float for each of r, g, b, a.
 270     * \param depth  depth clear value in [0,1].
 271     * \param stencil  stencil clear value
 272     */
 273    void (*clear)(struct pipe_context *pipe,
 274                  unsigned buffers,
 275                  const float *rgba,
 276                  double depth,
 277                  unsigned stencil);
 278
 279    /** Flush rendering
 280     * \param flags  bitmask of PIPE_FLUSH_x tokens)
 281     */
 282    void (*flush)( struct pipe_context *pipe,
 283                   unsigned flags,
 284                   struct pipe_fence_handle **fence );
 285
 286    /**
 287     * Check whether a texture is referenced by an unflushed hw command.
 288     * The state-tracker uses this function to avoid unnecessary flushes.
 289     * It is safe (but wasteful) to always return
 290     * PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
 291     * \param pipe  context whose unflushed hw commands will be checked.
 292     * \param texture  texture to check.
 293     * \param face  cubemap face. Use 0 for non-cubemap texture.
 294     * \param level  mipmap level.
 295     * \return mask of PIPE_REFERENCED_FOR_READ/WRITE or PIPE_UNREFERENCED
 296     */
 297    unsigned int (*is_resource_referenced)(struct pipe_context *pipe,
 298                                           struct pipe_resource *texture,
 299                                           unsigned face, unsigned level);
 300
 301    /**
 302     * Create a view on a texture to be used by a shader stage.
 303     */
 304    struct pipe_sampler_view * (*create_sampler_view)(struct pipe_context *ctx,
 305                                                      struct pipe_resource *texture,
 306                                                      const struct pipe_sampler_view *templat);
 307
 308    void (*sampler_view_destroy)(struct pipe_context *ctx,
 309                                 struct pipe_sampler_view *view);
 310
 311
 312    /**
 313     * Get a transfer object for transferring data to/from a texture.
 314     *
 315     * Transfers are (by default) context-private and allow uploads to be
 316     * interleaved with
 317     */
 318    struct pipe_transfer *(*get_transfer)(struct pipe_context *,
 319                                          struct pipe_resource *resource,
 320                                          struct pipe_subresource,
 321                                          unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 322                                          const struct pipe_box *);
 323
 324    void (*transfer_destroy)(struct pipe_context *,
 325                                 struct pipe_transfer *);
 326
 327    void *(*transfer_map)( struct pipe_context *,
 328                           struct pipe_transfer *transfer );
 329
 330    /* If transfer was created with WRITE|FLUSH_EXPLICIT, only the
 331     * regions specified with this call are guaranteed to be written to
 332     * the resource.
 333     */
 334    void (*transfer_flush_region)( struct pipe_context *,
 335                                   struct pipe_transfer *transfer,
 336                                   const struct pipe_box *);
 337
 338    void (*transfer_unmap)( struct pipe_context *,
 339                            struct pipe_transfer *transfer );
 340
 341
 342    /* One-shot transfer operation with data supplied in a user
 343     * pointer.  XXX: strides??
 344     */
 345    void (*transfer_inline_write)( struct pipe_context *,
 346                                   struct pipe_resource *,
 347                                   struct pipe_subresource,
 348                                   unsigned usage, /* a combination of PIPE_TRANSFER_x */
 349                                   const struct pipe_box *,
 350                                   const void *data,
 351                                   unsigned stride,
 352                                   unsigned slice_stride);
 353
 354 };
 355
 356
 357 #ifdef __cplusplus
 358 }
 359 #endif
 360
 361 #endif /* PIPE_CONTEXT_H */