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 /* Rasterizer output size going to jit fs, width/height */
  54 #define LP_RASTER_BLOCK_SIZE 4
  55
  56
  57 struct lp_rasterizer_task;
  58
  59
  60 /**
  61  * Rasterization state.
  62  * Objects of this type are put into the shared data bin and pointed
  63  * to by commands in the per-tile bins.
  64  */
  65 struct lp_rast_state {
  66    /* State for the shader.  This also contains state which feeds into
  67     * the fragment shader, such as blend color and alpha ref value.
  68     */
  69    struct lp_jit_context jit_context;
  70
  71    /* The shader itself.  Probably we also need to pass a pointer to
  72     * the tile color/z/stencil data somehow
  73      */
  74    struct lp_fragment_shader_variant *variant;
  75 };
  76
  77
  78 /**
  79  * Coefficients necessary to run the shader at a given location.
  80  * First coefficient is position.
  81  * These pointers point into the bin data buffer.
  82  */
  83 struct lp_rast_shader_inputs {
  84    unsigned frontfacing:1;      /** True for front-facing */
  85    unsigned disable:1;          /** Partially binned, disable this command */
  86    unsigned opaque:1;           /** Is opaque */
  87    unsigned pad0:29;            /* wasted space */
  88    unsigned stride;             /* how much to advance data between a0, dadx, dady */
  89    unsigned pad2;               /* wasted space */
  90    unsigned pad3;               /* wasted space */
  91    /* followed by a0, dadx, dady and planes[] */
  92 };
  93
  94 /* Note: the order of these values is important as they are loaded by
  95  * sse code in rasterization:
  96  */
  97 struct lp_rast_plane {
  98    /* edge function values at minx,miny ?? */
  99    int c;
 100
 101    int dcdx;
 102    int dcdy;
 103
 104    /* one-pixel sized trivial reject offsets for each plane */
 105    int eo;
 106 };
 107
 108 /**
 109  * Rasterization information for a triangle known to be in this bin,
 110  * plus inputs to run the shader:
 111  * These fields are tile- and bin-independent.
 112  * Objects of this type are put into the lp_setup_context::data buffer.
 113  */
 114 struct lp_rast_triangle {
 115 #ifdef DEBUG
 116    float v[3][2];
 117    float pad0;
 118    float pad1;
 119 #endif
 120
 121    /* inputs for the shader */
 122    struct lp_rast_shader_inputs inputs;
 123    /* planes are also allocated here */
 124 };
 125
 126
 127 #define GET_A0(inputs) ((float (*)[4])((inputs)+1))
 128 #define GET_DADX(inputs) ((float (*)[4])((char *)((inputs) + 1) + (inputs)->stride))
 129 #define GET_DADY(inputs) ((float (*)[4])((char *)((inputs) + 1) + 2 * (inputs)->stride))
 130 #define GET_PLANES(tri) ((struct lp_rast_plane *)((char *)(&(tri)->inputs + 1) + 3 * (tri)->inputs.stride))
 131
 132
 133
 134 struct lp_rasterizer *
 135 lp_rast_create( unsigned num_threads );
 136
 137 void
 138 lp_rast_destroy( struct lp_rasterizer * );
 139
 140 unsigned
 141 lp_rast_get_num_threads( struct lp_rasterizer * );
 142
 143 void
 144 lp_rast_queue_scene( struct lp_rasterizer *rast,
 145                      struct lp_scene *scene );
 146
 147 void
 148 lp_rast_finish( struct lp_rasterizer *rast );
 149
 150
 151 union lp_rast_cmd_arg {
 152    const struct lp_rast_shader_inputs *shade_tile;
 153    struct {
 154       const struct lp_rast_triangle *tri;
 155       unsigned plane_mask;
 156    } triangle;
 157    const struct lp_rast_state *set_state;
 158    union pipe_color_union clear_color;
 159    struct {
 160       uint64_t value;
 161       uint64_t mask;
 162    } clear_zstencil;
 163    const struct lp_rast_state *state;
 164    struct lp_fence *fence;
 165    struct llvmpipe_query *query_obj;
 166 };
 167
 168
 169 /* Cast wrappers.  Hopefully these compile to noops!
 170  */
 171 static INLINE union lp_rast_cmd_arg
 172 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 173 {
 174    union lp_rast_cmd_arg arg;
 175    arg.shade_tile = shade_tile;
 176    return arg;
 177 }
 178
 179 static INLINE union lp_rast_cmd_arg
 180 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
 181                       unsigned plane_mask)
 182 {
 183    union lp_rast_cmd_arg arg;
 184    arg.triangle.tri = triangle;
 185    arg.triangle.plane_mask = plane_mask;
 186    return arg;
 187 }
 188
 189 /**
 190  * Build argument for a contained triangle.
 191  *
 192  * All planes are enabled, so instead of the plane mask we pass the upper
 193  * left coordinates of the a block that fully encloses the triangle.
 194  */
 195 static INLINE union lp_rast_cmd_arg
 196 lp_rast_arg_triangle_contained( const struct lp_rast_triangle *triangle,
 197                                 unsigned x, unsigned y)
 198 {
 199    union lp_rast_cmd_arg arg;
 200    arg.triangle.tri = triangle;
 201    arg.triangle.plane_mask = x | (y << 8);
 202    return arg;
 203 }
 204
 205 static INLINE union lp_rast_cmd_arg
 206 lp_rast_arg_state( const struct lp_rast_state *state )
 207 {
 208    union lp_rast_cmd_arg arg;
 209    arg.set_state = state;
 210    return arg;
 211 }
 212
 213 static INLINE union lp_rast_cmd_arg
 214 lp_rast_arg_fence( struct lp_fence *fence )
 215 {
 216    union lp_rast_cmd_arg arg;
 217    arg.fence = fence;
 218    return arg;
 219 }
 220
 221
 222 static INLINE union lp_rast_cmd_arg
 223 lp_rast_arg_clearzs( uint64_t value, uint64_t mask )
 224 {
 225    union lp_rast_cmd_arg arg;
 226    arg.clear_zstencil.value = value;
 227    arg.clear_zstencil.mask = mask;
 228    return arg;
 229 }
 230
 231
 232 static INLINE union lp_rast_cmd_arg
 233 lp_rast_arg_query( struct llvmpipe_query *pq )
 234 {
 235    union lp_rast_cmd_arg arg;
 236    arg.query_obj = pq;
 237    return arg;
 238 }
 239
 240 static INLINE union lp_rast_cmd_arg
 241 lp_rast_arg_null( void )
 242 {
 243    union lp_rast_cmd_arg arg;
 244    arg.set_state = NULL;
 245    return arg;
 246 }
 247
 248
 249 /**
 250  * Binnable Commands.
 251  * These get put into bins by the setup code and are called when
 252  * the bins are executed.
 253  */
 254 #define LP_RAST_OP_CLEAR_COLOR       0x0
 255 #define LP_RAST_OP_CLEAR_ZSTENCIL    0x1
 256 #define LP_RAST_OP_TRIANGLE_1        0x2
 257 #define LP_RAST_OP_TRIANGLE_2        0x3
 258 #define LP_RAST_OP_TRIANGLE_3        0x4
 259 #define LP_RAST_OP_TRIANGLE_4        0x5
 260 #define LP_RAST_OP_TRIANGLE_5        0x6
 261 #define LP_RAST_OP_TRIANGLE_6        0x7
 262 #define LP_RAST_OP_TRIANGLE_7        0x8
 263 #define LP_RAST_OP_TRIANGLE_8        0x9
 264 #define LP_RAST_OP_TRIANGLE_3_4      0xa
 265 #define LP_RAST_OP_TRIANGLE_3_16     0xb
 266 #define LP_RAST_OP_TRIANGLE_4_16     0xc
 267 #define LP_RAST_OP_SHADE_TILE        0xd
 268 #define LP_RAST_OP_SHADE_TILE_OPAQUE 0xe
 269 #define LP_RAST_OP_BEGIN_QUERY       0xf
 270 #define LP_RAST_OP_END_QUERY         0x10
 271 #define LP_RAST_OP_SET_STATE         0x11
 272
 273 #define LP_RAST_OP_MAX               0x12
 274 #define LP_RAST_OP_MASK              0xff
 275
 276 void
 277 lp_debug_bins( struct lp_scene *scene );
 278 void
 279 lp_debug_draw_bins_by_cmd_length( struct lp_scene *scene );
 280 void
 281 lp_debug_draw_bins_by_coverage( struct lp_scene *scene );
 282
 283
 284 #endif