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    boolean (*get_query_result)(struct pipe_context *pipe,
 126                                struct pipe_query *q,
 127                                boolean wait,
 128                                uint64_t *result);
 129    /*@}*/
 130
 131    /**
 132     * State functions (create/bind/destroy state objects)
 133     */
 134    /*@{*/
 135    void * (*create_blend_state)(struct pipe_context *,
 136                                 const struct pipe_blend_state *);
 137    void   (*bind_blend_state)(struct pipe_context *, void *);
 138    void   (*delete_blend_state)(struct pipe_context *, void  *);
 139
 140    void * (*create_sampler_state)(struct pipe_context *,
 141                                   const struct pipe_sampler_state *);
 142    void   (*bind_fragment_sampler_states)(struct pipe_context *,
 143                                           unsigned num_samplers,
 144                                           void **samplers);
 145    void   (*bind_vertex_sampler_states)(struct pipe_context *,
 146                                         unsigned num_samplers,
 147                                         void **samplers);
 148    void   (*delete_sampler_state)(struct pipe_context *, void *);
 149
 150    void * (*create_rasterizer_state)(struct pipe_context *,
 151                                      const struct pipe_rasterizer_state *);
 152    void   (*bind_rasterizer_state)(struct pipe_context *, void *);
 153    void   (*delete_rasterizer_state)(struct pipe_context *, void *);
 154
 155    void * (*create_depth_stencil_alpha_state)(struct pipe_context *,
 156                                         const struct pipe_depth_stencil_alpha_state *);
 157    void   (*bind_depth_stencil_alpha_state)(struct pipe_context *, void *);
 158    void   (*delete_depth_stencil_alpha_state)(struct pipe_context *, void *);
 159
 160    void * (*create_fs_state)(struct pipe_context *,
 161                              const struct pipe_shader_state *);
 162    void   (*bind_fs_state)(struct pipe_context *, void *);
 163    void   (*delete_fs_state)(struct pipe_context *, void *);
 164
 165    void * (*create_vs_state)(struct pipe_context *,
 166                              const struct pipe_shader_state *);
 167    void   (*bind_vs_state)(struct pipe_context *, void *);
 168    void   (*delete_vs_state)(struct pipe_context *, void *);
 169
 170    void * (*create_gs_state)(struct pipe_context *,
 171                              const struct pipe_shader_state *);
 172    void   (*bind_gs_state)(struct pipe_context *, void *);
 173    void   (*delete_gs_state)(struct pipe_context *, void *);
 174
 175    /*@}*/
 176
 177    /**
 178     * Parameter-like state (or properties)
 179     */
 180    /*@{*/
 181    void (*set_blend_color)( struct pipe_context *,
 182                             const struct pipe_blend_color * );
 183
 184    void (*set_clip_state)( struct pipe_context *,
 185                            const struct pipe_clip_state * );
 186
 187    void (*set_constant_buffer)( struct pipe_context *,
 188                                 uint shader, uint index,
 189                                 struct pipe_buffer *buf );
 190
 191    void (*set_framebuffer_state)( struct pipe_context *,
 192                                   const struct pipe_framebuffer_state * );
 193
 194    void (*set_polygon_stipple)( struct pipe_context *,
 195                                 const struct pipe_poly_stipple * );
 196
 197    void (*set_scissor_state)( struct pipe_context *,
 198                               const struct pipe_scissor_state * );
 199
 200    void (*set_viewport_state)( struct pipe_context *,
 201                                const struct pipe_viewport_state * );
 202
 203    void (*set_fragment_sampler_textures)(struct pipe_context *,
 204                                          unsigned num_textures,
 205                                          struct pipe_texture **);
 206
 207    void (*set_vertex_sampler_textures)(struct pipe_context *,
 208                                        unsigned num_textures,
 209                                        struct pipe_texture **);
 210
 211    void (*set_vertex_buffers)( struct pipe_context *,
 212                                unsigned num_buffers,
 213                                const struct pipe_vertex_buffer * );
 214
 215    void (*set_vertex_elements)( struct pipe_context *,
 216                                 unsigned num_elements,
 217                                 const struct pipe_vertex_element * );
 218    /*@}*/
 219
 220
 221    /**
 222     * Surface functions
 223     *
 224     * The pipe driver is allowed to set these functions to NULL, and in that
 225     * case, they will not be available.
 226     */
 227    /*@{*/
 228
 229    /**
 230     * Copy a block of pixels from one surface to another.
 231     * The surfaces must be of the same format.
 232     */
 233    void (*surface_copy)(struct pipe_context *pipe,
 234                         struct pipe_surface *dest,
 235                         unsigned destx, unsigned desty,
 236                         struct pipe_surface *src,
 237                         unsigned srcx, unsigned srcy,
 238                         unsigned width, unsigned height);
 239
 240    /**
 241     * Fill a region of a surface with a constant value.
 242     */
 243    void (*surface_fill)(struct pipe_context *pipe,
 244                         struct pipe_surface *dst,
 245                         unsigned dstx, unsigned dsty,
 246                         unsigned width, unsigned height,
 247                         unsigned value);
 248    /*@}*/
 249
 250    /**
 251     * Clear the specified set of currently bound buffers to specified values.
 252     * The entire buffers are cleared (no scissor, no colormask, etc).
 253     *
 254     * \param buffers  bitfield of PIPE_CLEAR_* values.
 255     * \param rgba  pointer to an array of one float for each of r, g, b, a.
 256     * \param depth  depth clear value in [0,1].
 257     * \param stencil  stencil clear value
 258     */
 259    void (*clear)(struct pipe_context *pipe,
 260                  unsigned buffers,
 261                  const float *rgba,
 262                  double depth,
 263                  unsigned stencil);
 264
 265    /** Flush rendering
 266     * \param flags  bitmask of PIPE_FLUSH_x tokens)
 267     */
 268    void (*flush)( struct pipe_context *pipe,
 269                   unsigned flags,
 270                   struct pipe_fence_handle **fence );
 271
 272    /**
 273     * Check whether a texture is referenced by an unflushed hw command.
 274     * The state-tracker uses this function to avoid unnecessary flushes.
 275     * It is safe (but wasteful) to always return
 276     * PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
 277     * \param pipe  context whose unflushed hw commands will be checked.
 278     * \param texture  texture to check.
 279     * \param face  cubemap face. Use 0 for non-cubemap texture.
 280     * \param level  mipmap level.
 281     * \return mask of PIPE_REFERENCED_FOR_READ/WRITE or PIPE_UNREFERENCED
 282     */
 283    unsigned int (*is_texture_referenced)(struct pipe_context *pipe,
 284                                          struct pipe_texture *texture,
 285                                          unsigned face, unsigned level);
 286
 287    /**
 288     * Check whether a buffer is referenced by an unflushed hw command.
 289     * The state-tracker uses this function to avoid unnecessary flushes.
 290     * It is safe (but wasteful) to always return
 291     * PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
 292     * \param pipe  context whose unflushed hw commands will be checked.
 293     * \param buf  buffer to check.
 294     * \return mask of PIPE_REFERENCED_FOR_READ/WRITE or PIPE_UNREFERENCED
 295     */
 296    unsigned int (*is_buffer_referenced)(struct pipe_context *pipe,
 297                                         struct pipe_buffer *buf);
 298 };
 299
 300
 301 #ifdef __cplusplus
 302 }
 303 #endif
 304
 305 #endif /* PIPE_CONTEXT_H */