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 (return false on fallbacks (temporary??))
  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_buffer *indexBuffer,
  69                           unsigned indexSize,
  70                           unsigned mode, unsigned start, unsigned count);
  71
  72    void (*draw_arrays_instanced)(struct pipe_context *pipe,
  73                                  unsigned mode,
  74                                  unsigned start,
  75                                  unsigned count,
  76                                  unsigned startInstance,
  77                                  unsigned instanceCount);
  78
  79    void (*draw_elements_instanced)(struct pipe_context *pipe,
  80                                    struct pipe_buffer *indexBuffer,
  81                                    unsigned indexSize,
  82                                    unsigned mode,
  83                                    unsigned start,
  84                                    unsigned count,
  85                                    unsigned startInstance,
  86                                    unsigned instanceCount);
  87
  88    /* XXX: this is (probably) a temporary entrypoint, as the range
  89     * information should be available from the vertex_buffer state.
  90     * Using this to quickly evaluate a specialized path in the draw
  91     * module.
  92     */
  93    void (*draw_range_elements)( struct pipe_context *pipe,
  94                                 struct pipe_buffer *indexBuffer,
  95                                 unsigned indexSize,
  96                                 unsigned minIndex,
  97                                 unsigned maxIndex,
  98                                 unsigned mode,
  99                                 unsigned start,
 100                                 unsigned count);
 101    /*@}*/
 102
 103    /**
 104     * Predicate subsequent rendering on occlusion query result
 105     * \param query  the query predicate, or NULL if no predicate
 106     * \param mode  one of PIPE_RENDER_COND_x
 107     */
 108    void (*render_condition)( struct pipe_context *pipe,
 109                              struct pipe_query *query,
 110                              uint mode );
 111
 112    /**
 113     * Query objects
 114     */
 115    /*@{*/
 116    struct pipe_query *(*create_query)( struct pipe_context *pipe,
 117                                        unsigned query_type );
 118
 119    void (*destroy_query)(struct pipe_context *pipe,
 120                          struct pipe_query *q);
 121
 122    void (*begin_query)(struct pipe_context *pipe, struct pipe_query *q);
 123    void (*end_query)(struct pipe_context *pipe, struct pipe_query *q);
 124
 125    /**
 126     * Get results of a query.
 127     * \param wait  if true, this query will block until the result is ready
 128     * \return TRUE if results are ready, FALSE otherwise
 129     */
 130    boolean (*get_query_result)(struct pipe_context *pipe,
 131                                struct pipe_query *q,
 132                                boolean wait,
 133                                uint64_t *result);
 134    /*@}*/
 135
 136    /**
 137     * State functions (create/bind/destroy state objects)
 138     */
 139    /*@{*/
 140    void * (*create_blend_state)(struct pipe_context *,
 141                                 const struct pipe_blend_state *);
 142    void   (*bind_blend_state)(struct pipe_context *, void *);
 143    void   (*delete_blend_state)(struct pipe_context *, void  *);
 144
 145    void * (*create_sampler_state)(struct pipe_context *,
 146                                   const struct pipe_sampler_state *);
 147    void   (*bind_fragment_sampler_states)(struct pipe_context *,
 148                                           unsigned num_samplers,
 149                                           void **samplers);
 150    void   (*bind_vertex_sampler_states)(struct pipe_context *,
 151                                         unsigned num_samplers,
 152                                         void **samplers);
 153    void   (*delete_sampler_state)(struct pipe_context *, void *);
 154
 155    void * (*create_rasterizer_state)(struct pipe_context *,
 156                                      const struct pipe_rasterizer_state *);
 157    void   (*bind_rasterizer_state)(struct pipe_context *, void *);
 158    void   (*delete_rasterizer_state)(struct pipe_context *, void *);
 159
 160    void * (*create_depth_stencil_alpha_state)(struct pipe_context *,
 161                                         const struct pipe_depth_stencil_alpha_state *);
 162    void   (*bind_depth_stencil_alpha_state)(struct pipe_context *, void *);
 163    void   (*delete_depth_stencil_alpha_state)(struct pipe_context *, void *);
 164
 165    void * (*create_fs_state)(struct pipe_context *,
 166                              const struct pipe_shader_state *);
 167    void   (*bind_fs_state)(struct pipe_context *, void *);
 168    void   (*delete_fs_state)(struct pipe_context *, void *);
 169
 170    void * (*create_vs_state)(struct pipe_context *,
 171                              const struct pipe_shader_state *);
 172    void   (*bind_vs_state)(struct pipe_context *, void *);
 173    void   (*delete_vs_state)(struct pipe_context *, void *);
 174
 175    void * (*create_gs_state)(struct pipe_context *,
 176                              const struct pipe_shader_state *);
 177    void   (*bind_gs_state)(struct pipe_context *, void *);
 178    void   (*delete_gs_state)(struct pipe_context *, void *);
 179
 180    void * (*create_vertex_elements_state)(struct pipe_context *,
 181                                           unsigned num_elements,
 182                                           const struct pipe_vertex_element *);
 183    void   (*bind_vertex_elements_state)(struct pipe_context *, void *);
 184    void   (*delete_vertex_elements_state)(struct pipe_context *, void *);
 185
 186    /*@}*/
 187
 188    /**
 189     * Parameter-like state (or properties)
 190     */
 191    /*@{*/
 192    void (*set_blend_color)( struct pipe_context *,
 193                             const struct pipe_blend_color * );
 194
 195    void (*set_stencil_ref)( struct pipe_context *,
 196                             const struct pipe_stencil_ref * );
 197
 198    void (*set_clip_state)( struct pipe_context *,
 199                             const struct pipe_clip_state * );
 200
 201    void (*set_constant_buffer)( struct pipe_context *,
 202                                 uint shader, uint index,
 203                                 struct pipe_buffer *buf );
 204
 205    void (*set_framebuffer_state)( struct pipe_context *,
 206                                   const struct pipe_framebuffer_state * );
 207
 208    void (*set_polygon_stipple)( struct pipe_context *,
 209                                 const struct pipe_poly_stipple * );
 210
 211    void (*set_scissor_state)( struct pipe_context *,
 212                               const struct pipe_scissor_state * );
 213
 214    void (*set_viewport_state)( struct pipe_context *,
 215                                const struct pipe_viewport_state * );
 216
 217    void (*set_fragment_sampler_views)(struct pipe_context *,
 218                                       unsigned num_views,
 219                                       struct pipe_sampler_view **);
 220
 221    void (*set_vertex_sampler_views)(struct pipe_context *,
 222                                     unsigned num_views,
 223                                     struct pipe_sampler_view **);
 224
 225    void (*set_vertex_buffers)( struct pipe_context *,
 226                                unsigned num_buffers,
 227                                const struct pipe_vertex_buffer * );
 228
 229    /*@}*/
 230
 231
 232    /**
 233     * Surface functions
 234     *
 235     * The pipe driver is allowed to set these functions to NULL, and in that
 236     * case, they will not be available.
 237     */
 238    /*@{*/
 239
 240    /**
 241     * Copy a block of pixels from one surface to another.
 242     * The surfaces must be of the same format.
 243     */
 244    void (*surface_copy)(struct pipe_context *pipe,
 245                         struct pipe_surface *dest,
 246                         unsigned destx, unsigned desty,
 247                         struct pipe_surface *src,
 248                         unsigned srcx, unsigned srcy,
 249                         unsigned width, unsigned height);
 250
 251    /**
 252     * Fill a region of a surface with a constant value.
 253     */
 254    void (*surface_fill)(struct pipe_context *pipe,
 255                         struct pipe_surface *dst,
 256                         unsigned dstx, unsigned dsty,
 257                         unsigned width, unsigned height,
 258                         unsigned value);
 259    /*@}*/
 260
 261    /**
 262     * Clear the specified set of currently bound buffers to specified values.
 263     * The entire buffers are cleared (no scissor, no colormask, etc).
 264     *
 265     * \param buffers  bitfield of PIPE_CLEAR_* values.
 266     * \param rgba  pointer to an array of one float for each of r, g, b, a.
 267     * \param depth  depth clear value in [0,1].
 268     * \param stencil  stencil clear value
 269     */
 270    void (*clear)(struct pipe_context *pipe,
 271                  unsigned buffers,
 272                  const float *rgba,
 273                  double depth,
 274                  unsigned stencil);
 275
 276    /** Flush rendering
 277     * \param flags  bitmask of PIPE_FLUSH_x tokens)
 278     */
 279    void (*flush)( struct pipe_context *pipe,
 280                   unsigned flags,
 281                   struct pipe_fence_handle **fence );
 282
 283    /**
 284     * Check whether a texture is referenced by an unflushed hw command.
 285     * The state-tracker uses this function to avoid unnecessary flushes.
 286     * It is safe (but wasteful) to always return
 287     * PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
 288     * \param pipe  context whose unflushed hw commands will be checked.
 289     * \param texture  texture to check.
 290     * \param face  cubemap face. Use 0 for non-cubemap texture.
 291     * \param level  mipmap level.
 292     * \return mask of PIPE_REFERENCED_FOR_READ/WRITE or PIPE_UNREFERENCED
 293     */
 294    unsigned int (*is_texture_referenced)(struct pipe_context *pipe,
 295                                          struct pipe_texture *texture,
 296                                          unsigned face, unsigned level);
 297
 298    /**
 299     * Check whether a buffer is referenced by an unflushed hw command.
 300     * The state-tracker uses this function to avoid unnecessary flushes.
 301     * It is safe (but wasteful) to always return
 302     * PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
 303     * \param pipe  context whose unflushed hw commands will be checked.
 304     * \param buf  buffer to check.
 305     * \return mask of PIPE_REFERENCED_FOR_READ/WRITE or PIPE_UNREFERENCED
 306     */
 307    unsigned int (*is_buffer_referenced)(struct pipe_context *pipe,
 308                                         struct pipe_buffer *buf);
 309
 310    /**
 311     * Create a view on a texture to be used by a shader stage.
 312     */
 313    struct pipe_sampler_view * (*create_sampler_view)(struct pipe_context *ctx,
 314                                                      struct pipe_texture *texture,
 315                                                      const struct pipe_sampler_view *templat);
 316
 317    void (*sampler_view_destroy)(struct pipe_context *ctx,
 318                                 struct pipe_sampler_view *view);
 319 };
 320
 321
 322 #ifdef __cplusplus
 323 }
 324 #endif
 325
 326 #endif /* PIPE_CONTEXT_H */