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    /* edge/step info for 3 edges and 4x4 block of pixels */
  88    PIPE_ALIGN_VAR(16) int step[3][16];
  89 };
  90
  91 struct lp_rast_clearzs {
  92    unsigned clearzs_value;
  93    unsigned clearzs_mask;
  94 };
  95
  96
  97 /**
  98  * Rasterization information for a triangle known to be in this bin,
  99  * plus inputs to run the shader:
 100  * These fields are tile- and bin-independent.
 101  * Objects of this type are put into the lp_setup_context::data buffer.
 102  */
 103 struct lp_rast_triangle {
 104 #ifdef DEBUG
 105    float v[3][2];
 106 #endif
 107
 108    /* one-pixel sized trivial accept offsets for each plane */
 109    int ei1;
 110    int ei2;
 111    int ei3;
 112
 113    /* one-pixel sized trivial reject offsets for each plane */
 114    int eo1;
 115    int eo2;
 116    int eo3;
 117
 118    /* y deltas for vertex pairs (in fixed pt) */
 119    int dy12;
 120    int dy23;
 121    int dy31;
 122
 123    /* x deltas for vertex pairs (in fixed pt) */
 124    int dx12;
 125    int dx23;
 126    int dx31;
 127
 128    /* edge function values at minx,miny ?? */
 129    int c1, c2, c3;
 130
 131    /* inputs for the shader */
 132    PIPE_ALIGN_VAR(16) struct lp_rast_shader_inputs inputs;
 133 };
 134
 135
 136
 137 struct lp_rasterizer *
 138 lp_rast_create( unsigned num_threads );
 139
 140 void
 141 lp_rast_destroy( struct lp_rasterizer * );
 142
 143 unsigned
 144 lp_rast_get_num_threads( struct lp_rasterizer * );
 145
 146 void
 147 lp_rast_queue_scene( struct lp_rasterizer *rast,
 148                      struct lp_scene *scene );
 149
 150 void
 151 lp_rast_finish( struct lp_rasterizer *rast );
 152
 153
 154 union lp_rast_cmd_arg {
 155    const struct lp_rast_shader_inputs *shade_tile;
 156    const struct lp_rast_triangle *triangle;
 157    const struct lp_rast_state *set_state;
 158    uint8_t clear_color[4];
 159    const struct lp_rast_clearzs *clear_zstencil;
 160    struct lp_fence *fence;
 161    struct llvmpipe_query *query_obj;
 162 };
 163
 164
 165 /* Cast wrappers.  Hopefully these compile to noops!
 166  */
 167 static INLINE union lp_rast_cmd_arg
 168 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 169 {
 170    union lp_rast_cmd_arg arg;
 171    arg.shade_tile = shade_tile;
 172    return arg;
 173 }
 174
 175 static INLINE union lp_rast_cmd_arg
 176 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle )
 177 {
 178    union lp_rast_cmd_arg arg;
 179    arg.triangle = triangle;
 180    return arg;
 181 }
 182
 183 static INLINE union lp_rast_cmd_arg
 184 lp_rast_arg_state( const struct lp_rast_state *state )
 185 {
 186    union lp_rast_cmd_arg arg;
 187    arg.set_state = state;
 188    return arg;
 189 }
 190
 191 static INLINE union lp_rast_cmd_arg
 192 lp_rast_arg_fence( struct lp_fence *fence )
 193 {
 194    union lp_rast_cmd_arg arg;
 195    arg.fence = fence;
 196    return arg;
 197 }
 198
 199
 200 static INLINE union lp_rast_cmd_arg
 201 lp_rast_arg_clearzs( const struct lp_rast_clearzs *clearzs )
 202 {
 203    union lp_rast_cmd_arg arg;
 204    arg.clear_zstencil = clearzs;
 205    return arg;
 206 }
 207
 208 static INLINE union lp_rast_cmd_arg
 209 lp_rast_arg_null( void )
 210 {
 211    union lp_rast_cmd_arg arg;
 212    arg.set_state = NULL;
 213    return arg;
 214 }
 215
 216
 217 /**
 218  * Binnable Commands.
 219  * These get put into bins by the setup code and are called when
 220  * the bins are executed.
 221  */
 222
 223 void lp_rast_clear_color( struct lp_rasterizer_task *,
 224                           const union lp_rast_cmd_arg );
 225
 226 void lp_rast_clear_zstencil( struct lp_rasterizer_task *,
 227                              const union lp_rast_cmd_arg );
 228
 229 void lp_rast_set_state( struct lp_rasterizer_task *,
 230                         const union lp_rast_cmd_arg );
 231
 232 void lp_rast_triangle( struct lp_rasterizer_task *,
 233                        const union lp_rast_cmd_arg );
 234
 235 void lp_rast_shade_tile( struct lp_rasterizer_task *,
 236                          const union lp_rast_cmd_arg );
 237
 238 void lp_rast_fence( struct lp_rasterizer_task *,
 239                     const union lp_rast_cmd_arg );
 240
 241 void lp_rast_store_color( struct lp_rasterizer_task *,
 242                           const union lp_rast_cmd_arg );
 243
 244
 245 void lp_rast_begin_query(struct lp_rasterizer_task *,
 246                          const union lp_rast_cmd_arg );
 247
 248 void lp_rast_end_query(struct lp_rasterizer_task *,
 249                        const union lp_rast_cmd_arg );
 250
 251
 252 #endif