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    unsigned disable:1;  /** Partially binned, disable this command */
  83    unsigned opaque:1;   /** Is opaque */
  84
  85    float (*a0)[4];
  86    float (*dadx)[4];
  87    float (*dady)[4];
  88
  89    const struct lp_rast_state *state;
  90 };
  91
  92 /* Note: the order of these values is important as they are loaded by
  93  * sse code in rasterization:
  94  */
  95 struct lp_rast_plane {
  96    /* edge function values at minx,miny ?? */
  97    int c;
  98
  99    int dcdx;
 100    int dcdy;
 101
 102    /* one-pixel sized trivial reject offsets for each plane */
 103    int eo;
 104
 105    /* one-pixel sized trivial accept offsets for each plane */
 106    int ei;
 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    struct {
 154       uint32_t value;
 155       uint32_t mask;
 156    } clear_zstencil;
 157    struct lp_fence *fence;
 158    struct llvmpipe_query *query_obj;
 159 };
 160
 161
 162 /* Cast wrappers.  Hopefully these compile to noops!
 163  */
 164 static INLINE union lp_rast_cmd_arg
 165 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 166 {
 167    union lp_rast_cmd_arg arg;
 168    arg.shade_tile = shade_tile;
 169    return arg;
 170 }
 171
 172 static INLINE union lp_rast_cmd_arg
 173 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
 174                       unsigned plane_mask)
 175 {
 176    union lp_rast_cmd_arg arg;
 177    arg.triangle.tri = triangle;
 178    arg.triangle.plane_mask = plane_mask;
 179    return arg;
 180 }
 181
 182 static INLINE union lp_rast_cmd_arg
 183 lp_rast_arg_state( const struct lp_rast_state *state )
 184 {
 185    union lp_rast_cmd_arg arg;
 186    arg.set_state = state;
 187    return arg;
 188 }
 189
 190 static INLINE union lp_rast_cmd_arg
 191 lp_rast_arg_fence( struct lp_fence *fence )
 192 {
 193    union lp_rast_cmd_arg arg;
 194    arg.fence = fence;
 195    return arg;
 196 }
 197
 198
 199 static INLINE union lp_rast_cmd_arg
 200 lp_rast_arg_clearzs( unsigned value, unsigned mask )
 201 {
 202    union lp_rast_cmd_arg arg;
 203    arg.clear_zstencil.value = value;
 204    arg.clear_zstencil.mask = mask;
 205    return arg;
 206 }
 207
 208
 209 static INLINE union lp_rast_cmd_arg
 210 lp_rast_arg_query( struct llvmpipe_query *pq )
 211 {
 212    union lp_rast_cmd_arg arg;
 213    arg.query_obj = pq;
 214    return arg;
 215 }
 216
 217 static INLINE union lp_rast_cmd_arg
 218 lp_rast_arg_null( void )
 219 {
 220    union lp_rast_cmd_arg arg;
 221    arg.set_state = NULL;
 222    return arg;
 223 }
 224
 225
 226 /**
 227  * Binnable Commands.
 228  * These get put into bins by the setup code and are called when
 229  * the bins are executed.
 230  */
 231 #define LP_RAST_OP_CLEAR_COLOR       0x0
 232 #define LP_RAST_OP_CLEAR_ZSTENCIL    0x1
 233 #define LP_RAST_OP_TRIANGLE_1        0x2
 234 #define LP_RAST_OP_TRIANGLE_2        0x3
 235 #define LP_RAST_OP_TRIANGLE_3        0x4
 236 #define LP_RAST_OP_TRIANGLE_4        0x5
 237 #define LP_RAST_OP_TRIANGLE_5        0x6
 238 #define LP_RAST_OP_TRIANGLE_6        0x7
 239 #define LP_RAST_OP_TRIANGLE_7        0x8
 240 #define LP_RAST_OP_TRIANGLE_8        0x9
 241 #define LP_RAST_OP_TRIANGLE_3_4      0xa
 242 #define LP_RAST_OP_TRIANGLE_3_16     0xb
 243 #define LP_RAST_OP_TRIANGLE_4_16     0xc
 244 #define LP_RAST_OP_SHADE_TILE        0xd
 245 #define LP_RAST_OP_SHADE_TILE_OPAQUE 0xe
 246 #define LP_RAST_OP_BEGIN_QUERY       0xf
 247 #define LP_RAST_OP_END_QUERY         0x10
 248
 249 #define LP_RAST_OP_MAX               0x11
 250 #define LP_RAST_OP_MASK              0xff
 251
 252 void
 253 lp_debug_bins( struct lp_scene *scene );
 254 void
 255 lp_debug_draw_bins_by_cmd_length( struct lp_scene *scene );
 256 void
 257 lp_debug_draw_bins_by_coverage( struct lp_scene *scene );
 258
 259
 260 #endif