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    unsigned frontfacing:1;      /** True for front-facing */
  82    unsigned disable:1;          /** Partially binned, disable this command */
  83    unsigned opaque:1;           /** Is opaque */
  84    unsigned pad0:29;            /* wasted space */
  85    unsigned stride;             /* how much to advance data between a0, dadx, dady */
  86    unsigned pad2;               /* wasted space */
  87    unsigned pad3;               /* wasted space */
  88    /* followed by a0, dadx, dady and planes[] */
  89 };
  90
  91 /* Note: the order of these values is important as they are loaded by
  92  * sse code in rasterization:
  93  */
  94 struct lp_rast_plane {
  95    /* edge function values at minx,miny ?? */
  96    int c;
  97
  98    int dcdx;
  99    int dcdy;
 100
 101    /* one-pixel sized trivial reject offsets for each plane */
 102    int eo;
 103 };
 104
 105 /**
 106  * Rasterization information for a triangle known to be in this bin,
 107  * plus inputs to run the shader:
 108  * These fields are tile- and bin-independent.
 109  * Objects of this type are put into the lp_setup_context::data buffer.
 110  */
 111 struct lp_rast_triangle {
 112 #ifdef DEBUG
 113    float v[3][2];
 114    float pad0;
 115    float pad1;
 116 #endif
 117
 118    /* inputs for the shader */
 119    struct lp_rast_shader_inputs inputs;
 120    /* planes are also allocated here */
 121 };
 122
 123
 124 #define GET_A0(inputs) ((float (*)[4])((inputs)+1))
 125 #define GET_DADX(inputs) ((float (*)[4])((char *)((inputs) + 1) + (inputs)->stride))
 126 #define GET_DADY(inputs) ((float (*)[4])((char *)((inputs) + 1) + 2 * (inputs)->stride))
 127 #define GET_PLANES(tri) ((struct lp_rast_plane *)((char *)(&(tri)->inputs + 1) + 3 * (tri)->inputs.stride))
 128
 129
 130
 131 struct lp_rasterizer *
 132 lp_rast_create( unsigned num_threads );
 133
 134 void
 135 lp_rast_destroy( struct lp_rasterizer * );
 136
 137 unsigned
 138 lp_rast_get_num_threads( struct lp_rasterizer * );
 139
 140 void
 141 lp_rast_queue_scene( struct lp_rasterizer *rast,
 142                      struct lp_scene *scene );
 143
 144 void
 145 lp_rast_finish( struct lp_rasterizer *rast );
 146
 147
 148 union lp_rast_cmd_arg {
 149    const struct lp_rast_shader_inputs *shade_tile;
 150    struct {
 151       const struct lp_rast_triangle *tri;
 152       unsigned plane_mask;
 153    } triangle;
 154    const struct lp_rast_state *set_state;
 155    uint8_t clear_color[4];
 156    struct {
 157       uint32_t value;
 158       uint32_t mask;
 159    } clear_zstencil;
 160    const struct lp_rast_state *state;
 161    struct lp_fence *fence;
 162    struct llvmpipe_query *query_obj;
 163 };
 164
 165
 166 /* Cast wrappers.  Hopefully these compile to noops!
 167  */
 168 static INLINE union lp_rast_cmd_arg
 169 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 170 {
 171    union lp_rast_cmd_arg arg;
 172    arg.shade_tile = shade_tile;
 173    return arg;
 174 }
 175
 176 static INLINE union lp_rast_cmd_arg
 177 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
 178                       unsigned plane_mask)
 179 {
 180    union lp_rast_cmd_arg arg;
 181    arg.triangle.tri = triangle;
 182    arg.triangle.plane_mask = plane_mask;
 183    return arg;
 184 }
 185
 186 static INLINE union lp_rast_cmd_arg
 187 lp_rast_arg_state( const struct lp_rast_state *state )
 188 {
 189    union lp_rast_cmd_arg arg;
 190    arg.set_state = state;
 191    return arg;
 192 }
 193
 194 static INLINE union lp_rast_cmd_arg
 195 lp_rast_arg_fence( struct lp_fence *fence )
 196 {
 197    union lp_rast_cmd_arg arg;
 198    arg.fence = fence;
 199    return arg;
 200 }
 201
 202
 203 static INLINE union lp_rast_cmd_arg
 204 lp_rast_arg_clearzs( unsigned value, unsigned mask )
 205 {
 206    union lp_rast_cmd_arg arg;
 207    arg.clear_zstencil.value = value;
 208    arg.clear_zstencil.mask = mask;
 209    return arg;
 210 }
 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 static INLINE union lp_rast_cmd_arg
 222 lp_rast_arg_null( void )
 223 {
 224    union lp_rast_cmd_arg arg;
 225    arg.set_state = NULL;
 226    return arg;
 227 }
 228
 229
 230 /**
 231  * Binnable Commands.
 232  * These get put into bins by the setup code and are called when
 233  * the bins are executed.
 234  */
 235 #define LP_RAST_OP_CLEAR_COLOR       0x0
 236 #define LP_RAST_OP_CLEAR_ZSTENCIL    0x1
 237 #define LP_RAST_OP_TRIANGLE_1        0x2
 238 #define LP_RAST_OP_TRIANGLE_2        0x3
 239 #define LP_RAST_OP_TRIANGLE_3        0x4
 240 #define LP_RAST_OP_TRIANGLE_4        0x5
 241 #define LP_RAST_OP_TRIANGLE_5        0x6
 242 #define LP_RAST_OP_TRIANGLE_6        0x7
 243 #define LP_RAST_OP_TRIANGLE_7        0x8
 244 #define LP_RAST_OP_TRIANGLE_8        0x9
 245 #define LP_RAST_OP_TRIANGLE_3_4      0xa
 246 #define LP_RAST_OP_TRIANGLE_3_16     0xb
 247 #define LP_RAST_OP_TRIANGLE_4_16     0xc
 248 #define LP_RAST_OP_SHADE_TILE        0xd
 249 #define LP_RAST_OP_SHADE_TILE_OPAQUE 0xe
 250 #define LP_RAST_OP_BEGIN_QUERY       0xf
 251 #define LP_RAST_OP_END_QUERY         0x10
 252 #define LP_RAST_OP_SET_STATE         0x11
 253
 254 #define LP_RAST_OP_MAX               0x12
 255 #define LP_RAST_OP_MASK              0xff
 256
 257 void
 258 lp_debug_bins( struct lp_scene *scene );
 259 void
 260 lp_debug_draw_bins_by_cmd_length( struct lp_scene *scene );
 261 void
 262 lp_debug_draw_bins_by_coverage( struct lp_scene *scene );
 263
 264
 265 #endif