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 struct lp_rast_clearzs {
  92    unsigned clearzs_value;
  93    unsigned clearzs_mask;
  94 };
  95
  96 struct lp_rast_plane {
  97    /* one-pixel sized trivial accept offsets for each plane */
  98    int ei;
  99
 100    /* one-pixel sized trivial reject offsets for each plane */
 101    int eo;
 102
 103    /* edge function values at minx,miny ?? */
 104    int c;
 105
 106    int dcdx;
 107    int dcdy;
 108 };
 109
 110 /**
 111  * Rasterization information for a triangle known to be in this bin,
 112  * plus inputs to run the shader:
 113  * These fields are tile- and bin-independent.
 114  * Objects of this type are put into the lp_setup_context::data buffer.
 115  */
 116 struct lp_rast_triangle {
 117    /* inputs for the shader */
 118    struct lp_rast_shader_inputs inputs;
 119
 120 #ifdef DEBUG
 121    float v[3][2];
 122 #endif
 123
 124    struct lp_rast_plane plane[8]; /* NOTE: may allocate fewer planes */
 125 };
 126
 127
 128
 129 struct lp_rasterizer *
 130 lp_rast_create( unsigned num_threads );
 131
 132 void
 133 lp_rast_destroy( struct lp_rasterizer * );
 134
 135 unsigned
 136 lp_rast_get_num_threads( struct lp_rasterizer * );
 137
 138 void
 139 lp_rast_queue_scene( struct lp_rasterizer *rast,
 140                      struct lp_scene *scene );
 141
 142 void
 143 lp_rast_finish( struct lp_rasterizer *rast );
 144
 145
 146 union lp_rast_cmd_arg {
 147    const struct lp_rast_shader_inputs *shade_tile;
 148    struct {
 149       const struct lp_rast_triangle *tri;
 150       unsigned plane_mask;
 151    } triangle;
 152    const struct lp_rast_state *set_state;
 153    uint8_t clear_color[4];
 154    const struct lp_rast_clearzs *clear_zstencil;
 155    struct lp_fence *fence;
 156    struct llvmpipe_query *query_obj;
 157 };
 158
 159
 160 /* Cast wrappers.  Hopefully these compile to noops!
 161  */
 162 static INLINE union lp_rast_cmd_arg
 163 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 164 {
 165    union lp_rast_cmd_arg arg;
 166    arg.shade_tile = shade_tile;
 167    return arg;
 168 }
 169
 170 static INLINE union lp_rast_cmd_arg
 171 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
 172                       unsigned plane_mask)
 173 {
 174    union lp_rast_cmd_arg arg;
 175    arg.triangle.tri = triangle;
 176    arg.triangle.plane_mask = plane_mask;
 177    return arg;
 178 }
 179
 180 static INLINE union lp_rast_cmd_arg
 181 lp_rast_arg_state( const struct lp_rast_state *state )
 182 {
 183    union lp_rast_cmd_arg arg;
 184    arg.set_state = state;
 185    return arg;
 186 }
 187
 188 static INLINE union lp_rast_cmd_arg
 189 lp_rast_arg_fence( struct lp_fence *fence )
 190 {
 191    union lp_rast_cmd_arg arg;
 192    arg.fence = fence;
 193    return arg;
 194 }
 195
 196
 197 static INLINE union lp_rast_cmd_arg
 198 lp_rast_arg_clearzs( const struct lp_rast_clearzs *clearzs )
 199 {
 200    union lp_rast_cmd_arg arg;
 201    arg.clear_zstencil = clearzs;
 202    return arg;
 203 }
 204
 205 static INLINE union lp_rast_cmd_arg
 206 lp_rast_arg_null( void )
 207 {
 208    union lp_rast_cmd_arg arg;
 209    arg.set_state = NULL;
 210    return arg;
 211 }
 212
 213 static INLINE union lp_rast_cmd_arg
 214 lp_rast_arg_query( struct llvmpipe_query *pq )
 215 {
 216    union lp_rast_cmd_arg arg;
 217    arg.query_obj = pq;
 218    return arg;
 219 }
 220
 221
 222 /**
 223  * Binnable Commands.
 224  * These get put into bins by the setup code and are called when
 225  * the bins are executed.
 226  */
 227
 228 void lp_rast_clear_color( struct lp_rasterizer_task *,
 229                           const union lp_rast_cmd_arg );
 230
 231 void lp_rast_clear_zstencil( struct lp_rasterizer_task *,
 232                              const union lp_rast_cmd_arg );
 233
 234 void lp_rast_triangle_1( struct lp_rasterizer_task *,
 235                          const union lp_rast_cmd_arg );
 236 void lp_rast_triangle_2( struct lp_rasterizer_task *,
 237                          const union lp_rast_cmd_arg );
 238 void lp_rast_triangle_3( struct lp_rasterizer_task *,
 239                          const union lp_rast_cmd_arg );
 240 void lp_rast_triangle_4( struct lp_rasterizer_task *,
 241                          const union lp_rast_cmd_arg );
 242 void lp_rast_triangle_5( struct lp_rasterizer_task *,
 243                          const union lp_rast_cmd_arg );
 244 void lp_rast_triangle_6( struct lp_rasterizer_task *,
 245                          const union lp_rast_cmd_arg );
 246 void lp_rast_triangle_7( struct lp_rasterizer_task *,
 247                          const union lp_rast_cmd_arg );
 248 void lp_rast_triangle_8( struct lp_rasterizer_task *,
 249                          const union lp_rast_cmd_arg );
 250
 251 void lp_rast_shade_tile( struct lp_rasterizer_task *,
 252                          const union lp_rast_cmd_arg );
 253
 254 void lp_rast_shade_tile_opaque( struct lp_rasterizer_task *,
 255                                 const union lp_rast_cmd_arg );
 256
 257 void lp_rast_fence( struct lp_rasterizer_task *,
 258                     const union lp_rast_cmd_arg );
 259
 260 void lp_rast_store_linear_color( struct lp_rasterizer_task *,
 261                           const union lp_rast_cmd_arg );
 262
 263
 264 void lp_rast_begin_query(struct lp_rasterizer_task *,
 265                          const union lp_rast_cmd_arg );
 266
 267 void lp_rast_restart_query(struct lp_rasterizer_task *,
 268                          const union lp_rast_cmd_arg );
 269
 270 void lp_rast_end_query(struct lp_rasterizer_task *,
 271                        const union lp_rast_cmd_arg );
 272
 273 void
 274 lp_rast_triangle_3_16(struct lp_rasterizer_task *task,
 275                       const union lp_rast_cmd_arg arg);
 276
 277
 278 #endif