src/gallium/drivers/llvmpipe/lp_rast.h

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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    boolean opaque:1;   /** Is opaque */
  83
  84    float (*a0)[4];
  85    float (*dadx)[4];
  86    float (*dady)[4];
  87
  88    const struct lp_rast_state *state;
  89 };
  90
  91
  92 struct lp_rast_plane {
  93    /* one-pixel sized trivial accept offsets for each plane */
  94    int ei;
  95
  96    /* one-pixel sized trivial reject offsets for each plane */
  97    int eo;
  98
  99    /* edge function values at minx,miny ?? */
 100    int c;
 101
 102    int dcdx;
 103    int dcdy;
 104 };
 105
 106 /**
 107  * Rasterization information for a triangle known to be in this bin,
 108  * plus inputs to run the shader:
 109  * These fields are tile- and bin-independent.
 110  * Objects of this type are put into the lp_setup_context::data buffer.
 111  */
 112 struct lp_rast_triangle {
 113    /* inputs for the shader */
 114    struct lp_rast_shader_inputs inputs;
 115
 116 #ifdef DEBUG
 117    float v[3][2];
 118 #endif
 119
 120    struct lp_rast_plane plane[8]; /* NOTE: may allocate fewer planes */
 121 };
 122
 123
 124
 125 struct lp_rasterizer *
 126 lp_rast_create( unsigned num_threads );
 127
 128 void
 129 lp_rast_destroy( struct lp_rasterizer * );
 130
 131 unsigned
 132 lp_rast_get_num_threads( struct lp_rasterizer * );
 133
 134 void
 135 lp_rast_queue_scene( struct lp_rasterizer *rast,
 136                      struct lp_scene *scene );
 137
 138 void
 139 lp_rast_finish( struct lp_rasterizer *rast );
 140
 141
 142 union lp_rast_cmd_arg {
 143    const struct lp_rast_shader_inputs *shade_tile;
 144    struct {
 145       const struct lp_rast_triangle *tri;
 146       unsigned plane_mask;
 147    } triangle;
 148    const struct lp_rast_state *set_state;
 149    uint8_t clear_color[4];
 150    struct {
 151       unsigned value;
 152       unsigned mask;
 153    } 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( unsigned value, unsigned mask )
 198 {
 199    union lp_rast_cmd_arg arg;
 200    arg.clear_zstencil.value = value;
 201    arg.clear_zstencil.mask = mask;
 202    return arg;
 203 }
 204
 205
 206 static INLINE union lp_rast_cmd_arg
 207 lp_rast_arg_null( void )
 208 {
 209    union lp_rast_cmd_arg arg;
 210    arg.set_state = NULL;
 211    return arg;
 212 }
 213
 214 static INLINE union lp_rast_cmd_arg
 215 lp_rast_arg_query( struct llvmpipe_query *pq )
 216 {
 217    union lp_rast_cmd_arg arg;
 218    arg.query_obj = pq;
 219    return arg;
 220 }
 221
 222
 223 /**
 224  * Binnable Commands.
 225  * These get put into bins by the setup code and are called when
 226  * the bins are executed.
 227  */
 228
 229 void lp_rast_clear_color( struct lp_rasterizer_task *,
 230                           const union lp_rast_cmd_arg );
 231
 232 void lp_rast_clear_zstencil( struct lp_rasterizer_task *,
 233                              const union lp_rast_cmd_arg );
 234
 235 void lp_rast_triangle_1( struct lp_rasterizer_task *,
 236                          const union lp_rast_cmd_arg );
 237 void lp_rast_triangle_2( struct lp_rasterizer_task *,
 238                          const union lp_rast_cmd_arg );
 239 void lp_rast_triangle_3( struct lp_rasterizer_task *,
 240                          const union lp_rast_cmd_arg );
 241 void lp_rast_triangle_4( struct lp_rasterizer_task *,
 242                          const union lp_rast_cmd_arg );
 243 void lp_rast_triangle_5( struct lp_rasterizer_task *,
 244                          const union lp_rast_cmd_arg );
 245 void lp_rast_triangle_6( struct lp_rasterizer_task *,
 246                          const union lp_rast_cmd_arg );
 247 void lp_rast_triangle_7( struct lp_rasterizer_task *,
 248                          const union lp_rast_cmd_arg );
 249 void lp_rast_triangle_8( struct lp_rasterizer_task *,
 250                          const union lp_rast_cmd_arg );
 251
 252 void lp_rast_shade_tile( struct lp_rasterizer_task *,
 253                          const union lp_rast_cmd_arg );
 254
 255 void lp_rast_shade_tile_opaque( struct lp_rasterizer_task *,
 256                                 const union lp_rast_cmd_arg );
 257
 258 void lp_rast_fence( struct lp_rasterizer_task *,
 259                     const union lp_rast_cmd_arg );
 260
 261 void lp_rast_store_linear_color( struct lp_rasterizer_task *,
 262                           const union lp_rast_cmd_arg );
 263
 264
 265 void lp_rast_begin_query(struct lp_rasterizer_task *,
 266                          const union lp_rast_cmd_arg );
 267
 268 void lp_rast_restart_query(struct lp_rasterizer_task *,
 269                          const union lp_rast_cmd_arg );
 270
 271 void lp_rast_end_query(struct lp_rasterizer_task *,
 272                        const union lp_rast_cmd_arg );
 273
 274 void
 275 lp_rast_triangle_3_16(struct lp_rasterizer_task *task,
 276                       const union lp_rast_cmd_arg arg);
 277
 278
 279 #endif