src/gallium/drivers/llvmpipe/lp_rast.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  16  * of the Software.
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  27
  28 /**
  29  * The rast code is concerned with rasterization of command bins.
  30  * Each screen tile has a bin associated with it.  To render the
  31  * scene we iterate over the tile bins and execute the commands
  32  * in each bin.
  33  * We'll do that with multiple threads...
  34  */
  35
  36
  37 #ifndef LP_RAST_H
  38 #define LP_RAST_H
  39
  40 #include "pipe/p_compiler.h"
  41 #include "lp_jit.h"
  42
  43
  44 struct lp_rasterizer;
  45 struct lp_scene;
  46 struct lp_fence;
  47 struct cmd_bin;
  48
  49 /** For sub-pixel positioning */
  50 #define FIXED_ORDER 4
  51 #define FIXED_ONE (1<<FIXED_ORDER)
  52
  53
  54 struct lp_rasterizer_task;
  55
  56
  57 /**
  58  * Rasterization state.
  59  * Objects of this type are put into the shared data bin and pointed
  60  * to by commands in the per-tile bins.
  61  */
  62 struct lp_rast_state {
  63    /* State for the shader.  This also contains state which feeds into
  64     * the fragment shader, such as blend color and alpha ref value.
  65     */
  66    struct lp_jit_context jit_context;
  67
  68    /* The shader itself.  Probably we also need to pass a pointer to
  69     * the tile color/z/stencil data somehow
  70      */
  71    struct lp_fragment_shader_variant *variant;
  72 };
  73
  74
  75 /**
  76  * Coefficients necessary to run the shader at a given location.
  77  * First coefficient is position.
  78  * These pointers point into the bin data buffer.
  79  */
  80 struct lp_rast_shader_inputs {
  81    float facing;     /** Positive for front-facing, negative for back-facing */
  82
  83    float (*a0)[4];
  84    float (*dadx)[4];
  85    float (*dady)[4];
  86
  87    const struct lp_rast_state *state;
  88 };
  89
  90 struct lp_rast_clearzs {
  91    unsigned clearzs_value;
  92    unsigned clearzs_mask;
  93 };
  94
  95 struct lp_rast_plane {
  96    /* one-pixel sized trivial accept offsets for each plane */
  97    int ei;
  98
  99    /* one-pixel sized trivial reject offsets for each plane */
 100    int eo;
 101
 102    /* edge function values at minx,miny ?? */
 103    int c;
 104
 105    int dcdx;
 106    int dcdy;
 107 };
 108
 109 /**
 110  * Rasterization information for a triangle known to be in this bin,
 111  * plus inputs to run the shader:
 112  * These fields are tile- and bin-independent.
 113  * Objects of this type are put into the lp_setup_context::data buffer.
 114  */
 115 struct lp_rast_triangle {
 116    /* inputs for the shader */
 117    struct lp_rast_shader_inputs inputs;
 118
 119 #ifdef DEBUG
 120    float v[3][2];
 121 #endif
 122
 123    struct lp_rast_plane plane[8]; /* NOTE: may allocate fewer planes */
 124 };
 125
 126
 127
 128 struct lp_rasterizer *
 129 lp_rast_create( unsigned num_threads );
 130
 131 void
 132 lp_rast_destroy( struct lp_rasterizer * );
 133
 134 unsigned
 135 lp_rast_get_num_threads( struct lp_rasterizer * );
 136
 137 void
 138 lp_rast_queue_scene( struct lp_rasterizer *rast,
 139                      struct lp_scene *scene );
 140
 141 void
 142 lp_rast_finish( struct lp_rasterizer *rast );
 143
 144
 145 union lp_rast_cmd_arg {
 146    const struct lp_rast_shader_inputs *shade_tile;
 147    struct {
 148       const struct lp_rast_triangle *tri;
 149       unsigned plane_mask;
 150    } triangle;
 151    const struct lp_rast_state *set_state;
 152    uint8_t clear_color[4];
 153    const struct lp_rast_clearzs *clear_zstencil;
 154    struct lp_fence *fence;
 155    struct llvmpipe_query *query_obj;
 156 };
 157
 158
 159 /* Cast wrappers.  Hopefully these compile to noops!
 160  */
 161 static INLINE union lp_rast_cmd_arg
 162 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 163 {
 164    union lp_rast_cmd_arg arg;
 165    arg.shade_tile = shade_tile;
 166    return arg;
 167 }
 168
 169 static INLINE union lp_rast_cmd_arg
 170 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
 171                       unsigned plane_mask)
 172 {
 173    union lp_rast_cmd_arg arg;
 174    arg.triangle.tri = triangle;
 175    arg.triangle.plane_mask = plane_mask;
 176    return arg;
 177 }
 178
 179 static INLINE union lp_rast_cmd_arg
 180 lp_rast_arg_state( const struct lp_rast_state *state )
 181 {
 182    union lp_rast_cmd_arg arg;
 183    arg.set_state = state;
 184    return arg;
 185 }
 186
 187 static INLINE union lp_rast_cmd_arg
 188 lp_rast_arg_fence( struct lp_fence *fence )
 189 {
 190    union lp_rast_cmd_arg arg;
 191    arg.fence = fence;
 192    return arg;
 193 }
 194
 195
 196 static INLINE union lp_rast_cmd_arg
 197 lp_rast_arg_clearzs( const struct lp_rast_clearzs *clearzs )
 198 {
 199    union lp_rast_cmd_arg arg;
 200    arg.clear_zstencil = clearzs;
 201    return arg;
 202 }
 203
 204 static INLINE union lp_rast_cmd_arg
 205 lp_rast_arg_null( void )
 206 {
 207    union lp_rast_cmd_arg arg;
 208    arg.set_state = NULL;
 209    return arg;
 210 }
 211
 212
 213 /**
 214  * Binnable Commands.
 215  * These get put into bins by the setup code and are called when
 216  * the bins are executed.
 217  */
 218
 219 void lp_rast_clear_color( struct lp_rasterizer_task *,
 220                           const union lp_rast_cmd_arg );
 221
 222 void lp_rast_clear_zstencil( struct lp_rasterizer_task *,
 223                              const union lp_rast_cmd_arg );
 224
 225 void lp_rast_triangle_1( struct lp_rasterizer_task *,
 226                          const union lp_rast_cmd_arg );
 227 void lp_rast_triangle_2( struct lp_rasterizer_task *,
 228                          const union lp_rast_cmd_arg );
 229 void lp_rast_triangle_3( struct lp_rasterizer_task *,
 230                          const union lp_rast_cmd_arg );
 231 void lp_rast_triangle_4( struct lp_rasterizer_task *,
 232                          const union lp_rast_cmd_arg );
 233 void lp_rast_triangle_5( struct lp_rasterizer_task *,
 234                          const union lp_rast_cmd_arg );
 235 void lp_rast_triangle_6( struct lp_rasterizer_task *,
 236                          const union lp_rast_cmd_arg );
 237 void lp_rast_triangle_7( struct lp_rasterizer_task *,
 238                          const union lp_rast_cmd_arg );
 239 void lp_rast_triangle_8( struct lp_rasterizer_task *,
 240                          const union lp_rast_cmd_arg );
 241
 242 void lp_rast_shade_tile( struct lp_rasterizer_task *,
 243                          const union lp_rast_cmd_arg );
 244
 245 void lp_rast_shade_tile_opaque( struct lp_rasterizer_task *,
 246                                 const union lp_rast_cmd_arg );
 247
 248 void lp_rast_fence( struct lp_rasterizer_task *,
 249                     const union lp_rast_cmd_arg );
 250
 251 void lp_rast_store_linear_color( struct lp_rasterizer_task *,
 252                           const union lp_rast_cmd_arg );
 253
 254
 255 void lp_rast_begin_query(struct lp_rasterizer_task *,
 256                          const union lp_rast_cmd_arg );
 257
 258 void lp_rast_end_query(struct lp_rasterizer_task *,
 259                        const union lp_rast_cmd_arg );
 260
 261 void
 262 lp_rast_triangle_3_16(struct lp_rasterizer_task *task,
 263                       const union lp_rast_cmd_arg arg);
 264
 265
 266 #endif