workbench/libs/mesa/src/gallium/auxiliary/cso_cache/cso_cache.h

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   3  * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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  16  * of the Software.
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  27
  28  /**
  29   * @file
  30   * Constant State Object (CSO) cache.
  31   *
  32   * The basic idea is that the states are created via the
  33   * create_state/bind_state/delete_state semantics. The driver is expected to
  34   * perform as much of the Gallium state translation to whatever its internal
  35   * representation is during the create call. Gallium then has a caching
  36   * mechanism where it stores the created states. When the pipeline needs an
  37   * actual state change, a bind call is issued. In the bind call the driver
  38   * gets its already translated representation.
  39   *
  40   * Those semantics mean that the driver doesn't do the repeated translations
  41   * of states on every frame, but only once, when a new state is actually
  42   * created.
  43   *
  44   * Even on hardware that doesn't do any kind of state cache, it makes the
  45   * driver look a lot neater, plus it avoids all the redundant state
  46   * translations on every frame.
  47   *
  48   * Currently our constant state objects are:
  49   * - alpha test
  50   * - blend
  51   * - depth stencil
  52   * - fragment shader
  53   * - rasterizer (old setup)
  54   * - sampler
  55   * - vertex shader
  56   * - vertex elements
  57   *
  58   * Things that are not constant state objects include:
  59   * - blend_color
  60   * - clip_state
  61   * - clear_color_state
  62   * - constant_buffer
  63   * - feedback_state
  64   * - framebuffer_state
  65   * - polygon_stipple
  66   * - scissor_state
  67   * - texture_state
  68   * - viewport_state
  69   *
  70   * @author Zack Rusin <zack@tungstengraphics.com>
  71   */
  72
  73 #ifndef CSO_CACHE_H
  74 #define CSO_CACHE_H
  75
  76 #include "pipe/p_context.h"
  77 #include "pipe/p_state.h"
  78
  79 /* cso_hash.h is necessary for cso_hash_iter, as MSVC requires structures
  80  * returned by value to be fully defined */
  81 #include "cso_hash.h"
  82
  83
  84 #ifdef  __cplusplus
  85 extern "C" {
  86 #endif
  87
  88 enum cso_cache_type {
  89    CSO_RASTERIZER,
  90    CSO_BLEND,
  91    CSO_DEPTH_STENCIL_ALPHA,
  92    CSO_FRAGMENT_SHADER,
  93    CSO_VERTEX_SHADER,
  94    CSO_SAMPLER,
  95    CSO_VELEMENTS,
  96    CSO_CACHE_MAX,
  97 };
  98
  99 typedef void (*cso_state_callback)(void *ctx, void *obj);
 100
 101 typedef void (*cso_sanitize_callback)(struct cso_hash *hash,
 102                                       enum cso_cache_type type,
 103                                       int max_size,
 104                                       void *user_data);
 105
 106 struct cso_cache;
 107
 108 struct cso_blend {
 109    struct pipe_blend_state state;
 110    void *data;
 111    cso_state_callback delete_state;
 112    struct pipe_context *context;
 113 };
 114
 115 struct cso_depth_stencil_alpha {
 116    struct pipe_depth_stencil_alpha_state state;
 117    void *data;
 118    cso_state_callback delete_state;
 119    struct pipe_context *context;
 120 };
 121
 122 struct cso_rasterizer {
 123    struct pipe_rasterizer_state state;
 124    void *data;
 125    cso_state_callback delete_state;
 126    struct pipe_context *context;
 127 };
 128
 129 struct cso_fragment_shader {
 130    struct pipe_shader_state state;
 131    void *data;
 132    cso_state_callback delete_state;
 133    struct pipe_context *context;
 134 };
 135
 136 struct cso_vertex_shader {
 137    struct pipe_shader_state state;
 138    void *data;
 139    cso_state_callback delete_state;
 140    struct pipe_context *context;
 141 };
 142
 143 struct cso_sampler {
 144    struct pipe_sampler_state state;
 145    void *data;
 146    cso_state_callback delete_state;
 147    struct pipe_context *context;
 148 };
 149
 150 struct cso_velems_state {
 151    unsigned count;
 152    struct pipe_vertex_element velems[PIPE_MAX_ATTRIBS];
 153 };
 154
 155 struct cso_velements {
 156    struct cso_velems_state state;
 157    void *data;
 158    cso_state_callback delete_state;
 159    struct pipe_context *context;
 160 };
 161
 162 unsigned cso_construct_key(void *item, int item_size);
 163
 164 struct cso_cache *cso_cache_create(void);
 165 void cso_cache_delete(struct cso_cache *sc);
 166
 167 void cso_cache_set_sanitize_callback(struct cso_cache *sc,
 168                                      cso_sanitize_callback cb,
 169                                      void *user_data);
 170
 171 struct cso_hash_iter cso_insert_state(struct cso_cache *sc,
 172                                       unsigned hash_key, enum cso_cache_type type,
 173                                       void *state);
 174 struct cso_hash_iter cso_find_state(struct cso_cache *sc,
 175                                     unsigned hash_key, enum cso_cache_type type);
 176 struct cso_hash_iter cso_find_state_template(struct cso_cache *sc,
 177                                              unsigned hash_key, enum cso_cache_type type,
 178                                              void *templ, unsigned size);
 179 void cso_for_each_state(struct cso_cache *sc, enum cso_cache_type type,
 180                         cso_state_callback func, void *user_data);
 181 void * cso_take_state(struct cso_cache *sc, unsigned hash_key,
 182                       enum cso_cache_type type);
 183
 184 void cso_set_maximum_cache_size(struct cso_cache *sc, int number);
 185 int cso_maximum_cache_size(const struct cso_cache *sc);
 186
 187 #ifdef  __cplusplus
 188 }
 189 #endif
 190
 191 #endif