src/gallium/drivers/llvmpipe/lp_rast.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  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
  93 struct lp_rast_plane {
  94    /* one-pixel sized trivial accept offsets for each plane */
  95    int ei;
  96
  97    /* one-pixel sized trivial reject offsets for each plane */
  98    int eo;
  99
 100    /* edge function values at minx,miny ?? */
 101    int c;
 102
 103    int dcdx;
 104    int dcdy;
 105 };
 106
 107 /**
 108  * Rasterization information for a triangle known to be in this bin,
 109  * plus inputs to run the shader:
 110  * These fields are tile- and bin-independent.
 111  * Objects of this type are put into the lp_setup_context::data buffer.
 112  */
 113 struct lp_rast_triangle {
 114    /* inputs for the shader */
 115    struct lp_rast_shader_inputs inputs;
 116
 117 #ifdef DEBUG
 118    float v[3][2];
 119 #endif
 120
 121    struct lp_rast_plane plane[8]; /* NOTE: may allocate fewer planes */
 122 };
 123
 124
 125
 126 struct lp_rasterizer *
 127 lp_rast_create( unsigned num_threads );
 128
 129 void
 130 lp_rast_destroy( struct lp_rasterizer * );
 131
 132 unsigned
 133 lp_rast_get_num_threads( struct lp_rasterizer * );
 134
 135 void
 136 lp_rast_queue_scene( struct lp_rasterizer *rast,
 137                      struct lp_scene *scene );
 138
 139 void
 140 lp_rast_finish( struct lp_rasterizer *rast );
 141
 142
 143 union lp_rast_cmd_arg {
 144    const struct lp_rast_shader_inputs *shade_tile;
 145    struct {
 146       const struct lp_rast_triangle *tri;
 147       unsigned plane_mask;
 148    } triangle;
 149    const struct lp_rast_state *set_state;
 150    uint8_t clear_color[4];
 151    struct {
 152       unsigned value;
 153       unsigned mask;
 154    } 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( unsigned value, unsigned mask )
 199 {
 200    union lp_rast_cmd_arg arg;
 201    arg.clear_zstencil.value = value;
 202    arg.clear_zstencil.mask = mask;
 203    return arg;
 204 }
 205
 206
 207 static INLINE union lp_rast_cmd_arg
 208 lp_rast_arg_query( struct llvmpipe_query *pq )
 209 {
 210    union lp_rast_cmd_arg arg;
 211    arg.query_obj = pq;
 212    return arg;
 213 }
 214
 215 static INLINE union lp_rast_cmd_arg
 216 lp_rast_arg_null( void )
 217 {
 218    union lp_rast_cmd_arg arg;
 219    arg.set_state = NULL;
 220    return arg;
 221 }
 222
 223
 224 /**
 225  * Binnable Commands.
 226  * These get put into bins by the setup code and are called when
 227  * the bins are executed.
 228  */
 229 #define LP_RAST_OP_CLEAR_COLOR       0x0
 230 #define LP_RAST_OP_CLEAR_ZSTENCIL    0x1
 231 #define LP_RAST_OP_TRIANGLE_1        0x2
 232 #define LP_RAST_OP_TRIANGLE_2        0x3
 233 #define LP_RAST_OP_TRIANGLE_3        0x4
 234 #define LP_RAST_OP_TRIANGLE_4        0x5
 235 #define LP_RAST_OP_TRIANGLE_5        0x6
 236 #define LP_RAST_OP_TRIANGLE_6        0x7
 237 #define LP_RAST_OP_TRIANGLE_7        0x8
 238 #define LP_RAST_OP_TRIANGLE_8        0x9
 239 #define LP_RAST_OP_TRIANGLE_3_4      0xa
 240 #define LP_RAST_OP_TRIANGLE_3_16     0xb
 241 #define LP_RAST_OP_SHADE_TILE        0xc
 242 #define LP_RAST_OP_SHADE_TILE_OPAQUE 0xd
 243 #define LP_RAST_OP_BEGIN_QUERY       0xe
 244 #define LP_RAST_OP_END_QUERY         0xf
 245
 246 #define LP_RAST_OP_MAX               0x10
 247 #define LP_RAST_OP_MASK              0xff
 248
 249 void
 250 lp_debug_bins( struct lp_scene *scene );
 251 void
 252 lp_debug_draw_bins_by_cmd_length( struct lp_scene *scene );
 253 void
 254 lp_debug_draw_bins_by_coverage( struct lp_scene *scene );
 255
 256
 257 #endif