src/gallium/drivers/llvmpipe/lp_rast.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
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   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  25  *
  26  **************************************************************************/
  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 #define FIXED_TYPE_WIDTH 64
  50 /** For sub-pixel positioning */
  51 #define FIXED_ORDER 8
  52 #define FIXED_ONE (1<<FIXED_ORDER)
  53 #define FIXED_SHIFT (FIXED_TYPE_WIDTH - 1)
  54 /** Maximum length of an edge in a primitive in pixels.
  55  *  If the framebuffer is large we have to think about fixed-point
  56  *  integer overflow. Coordinates need ((FIXED_TYPE_WIDTH/2) - 1) bits
  57  *  to be able to fit product of two such coordinates inside
  58  *  FIXED_TYPE_WIDTH, any larger and we could overflow a
  59  *  FIXED_TYPE_WIDTH_-bit int.
  60  */
  61 #define MAX_FIXED_LENGTH (1 << (((FIXED_TYPE_WIDTH/2) - 1) - FIXED_ORDER))
  62
  63 #define MAX_FIXED_LENGTH32 (1 << (((32/2) - 1) - FIXED_ORDER))
  64
  65 /* Rasterizer output size going to jit fs, width/height */
  66 #define LP_RASTER_BLOCK_SIZE 4
  67
  68 #define LP_MAX_ACTIVE_BINNED_QUERIES 16
  69
  70 #define IMUL64(a, b) (((int64_t)(a)) * ((int64_t)(b)))
  71
  72 struct lp_rasterizer_task;
  73
  74
  75 /**
  76  * Rasterization state.
  77  * Objects of this type are put into the shared data bin and pointed
  78  * to by commands in the per-tile bins.
  79  */
  80 struct lp_rast_state {
  81    /* State for the shader.  This also contains state which feeds into
  82     * the fragment shader, such as blend color and alpha ref value.
  83     */
  84    struct lp_jit_context jit_context;
  85
  86    /* The shader itself.  Probably we also need to pass a pointer to
  87     * the tile color/z/stencil data somehow
  88      */
  89    struct lp_fragment_shader_variant *variant;
  90 };
  91
  92
  93 /**
  94  * Coefficients necessary to run the shader at a given location.
  95  * First coefficient is position.
  96  * These pointers point into the bin data buffer.
  97  */
  98 struct lp_rast_shader_inputs {
  99    unsigned frontfacing:1;      /** True for front-facing */
 100    unsigned disable:1;          /** Partially binned, disable this command */
 101    unsigned opaque:1;           /** Is opaque */
 102    unsigned pad0:29;            /* wasted space */
 103    unsigned stride;             /* how much to advance data between a0, dadx, dady */
 104    unsigned layer;              /* the layer to render to (from gs, already clamped) */
 105    unsigned pad2;               /* wasted space */
 106    /* followed by a0, dadx, dady and planes[] */
 107 };
 108
 109 struct lp_rast_plane {
 110    /* edge function values at minx,miny ?? */
 111    int64_t c;
 112
 113    int32_t dcdx;
 114    int32_t dcdy;
 115
 116    /* one-pixel sized trivial reject offsets for each plane */
 117    int64_t eo;
 118 };
 119
 120 /**
 121  * Rasterization information for a triangle known to be in this bin,
 122  * plus inputs to run the shader:
 123  * These fields are tile- and bin-independent.
 124  * Objects of this type are put into the lp_setup_context::data buffer.
 125  */
 126 struct lp_rast_triangle {
 127 #ifdef DEBUG
 128    float v[3][2];
 129    float pad0;
 130    float pad1;
 131 #endif
 132
 133    /* inputs for the shader */
 134    struct lp_rast_shader_inputs inputs;
 135    /* planes are also allocated here */
 136 };
 137
 138
 139 #define GET_A0(inputs) ((float (*)[4])((inputs)+1))
 140 #define GET_DADX(inputs) ((float (*)[4])((char *)((inputs) + 1) + (inputs)->stride))
 141 #define GET_DADY(inputs) ((float (*)[4])((char *)((inputs) + 1) + 2 * (inputs)->stride))
 142 #define GET_PLANES(tri) ((struct lp_rast_plane *)((char *)(&(tri)->inputs + 1) + 3 * (tri)->inputs.stride))
 143
 144
 145
 146 struct lp_rasterizer *
 147 lp_rast_create( unsigned num_threads );
 148
 149 void
 150 lp_rast_destroy( struct lp_rasterizer * );
 151
 152 void
 153 lp_rast_queue_scene( struct lp_rasterizer *rast,
 154                      struct lp_scene *scene );
 155
 156 void
 157 lp_rast_finish( struct lp_rasterizer *rast );
 158
 159
 160 union lp_rast_cmd_arg {
 161    const struct lp_rast_shader_inputs *shade_tile;
 162    struct {
 163       const struct lp_rast_triangle *tri;
 164       unsigned plane_mask;
 165    } triangle;
 166    const struct lp_rast_state *set_state;
 167    union pipe_color_union clear_color;
 168    struct {
 169       uint64_t value;
 170       uint64_t mask;
 171    } clear_zstencil;
 172    const struct lp_rast_state *state;
 173    struct lp_fence *fence;
 174    struct llvmpipe_query *query_obj;
 175 };
 176
 177
 178 /* Cast wrappers.  Hopefully these compile to noops!
 179  */
 180 static INLINE union lp_rast_cmd_arg
 181 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 182 {
 183    union lp_rast_cmd_arg arg;
 184    arg.shade_tile = shade_tile;
 185    return arg;
 186 }
 187
 188 static INLINE union lp_rast_cmd_arg
 189 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
 190                       unsigned plane_mask)
 191 {
 192    union lp_rast_cmd_arg arg;
 193    arg.triangle.tri = triangle;
 194    arg.triangle.plane_mask = plane_mask;
 195    return arg;
 196 }
 197
 198 /**
 199  * Build argument for a contained triangle.
 200  *
 201  * All planes are enabled, so instead of the plane mask we pass the upper
 202  * left coordinates of the a block that fully encloses the triangle.
 203  */
 204 static INLINE union lp_rast_cmd_arg
 205 lp_rast_arg_triangle_contained( const struct lp_rast_triangle *triangle,
 206                                 unsigned x, unsigned y)
 207 {
 208    union lp_rast_cmd_arg arg;
 209    arg.triangle.tri = triangle;
 210    arg.triangle.plane_mask = x | (y << 8);
 211    return arg;
 212 }
 213
 214 static INLINE union lp_rast_cmd_arg
 215 lp_rast_arg_state( const struct lp_rast_state *state )
 216 {
 217    union lp_rast_cmd_arg arg;
 218    arg.set_state = state;
 219    return arg;
 220 }
 221
 222 static INLINE union lp_rast_cmd_arg
 223 lp_rast_arg_fence( struct lp_fence *fence )
 224 {
 225    union lp_rast_cmd_arg arg;
 226    arg.fence = fence;
 227    return arg;
 228 }
 229
 230
 231 static INLINE union lp_rast_cmd_arg
 232 lp_rast_arg_clearzs( uint64_t value, uint64_t mask )
 233 {
 234    union lp_rast_cmd_arg arg;
 235    arg.clear_zstencil.value = value;
 236    arg.clear_zstencil.mask = mask;
 237    return arg;
 238 }
 239
 240
 241 static INLINE union lp_rast_cmd_arg
 242 lp_rast_arg_query( struct llvmpipe_query *pq )
 243 {
 244    union lp_rast_cmd_arg arg;
 245    arg.query_obj = pq;
 246    return arg;
 247 }
 248
 249 static INLINE union lp_rast_cmd_arg
 250 lp_rast_arg_null( void )
 251 {
 252    union lp_rast_cmd_arg arg;
 253    arg.set_state = NULL;
 254    return arg;
 255 }
 256
 257
 258 /**
 259  * Binnable Commands.
 260  * These get put into bins by the setup code and are called when
 261  * the bins are executed.
 262  */
 263 #define LP_RAST_OP_CLEAR_COLOR       0x0
 264 #define LP_RAST_OP_CLEAR_ZSTENCIL    0x1
 265 #define LP_RAST_OP_TRIANGLE_1        0x2
 266 #define LP_RAST_OP_TRIANGLE_2        0x3
 267 #define LP_RAST_OP_TRIANGLE_3        0x4
 268 #define LP_RAST_OP_TRIANGLE_4        0x5
 269 #define LP_RAST_OP_TRIANGLE_5        0x6
 270 #define LP_RAST_OP_TRIANGLE_6        0x7
 271 #define LP_RAST_OP_TRIANGLE_7        0x8
 272 #define LP_RAST_OP_TRIANGLE_8        0x9
 273 #define LP_RAST_OP_TRIANGLE_3_4      0xa
 274 #define LP_RAST_OP_TRIANGLE_3_16     0xb
 275 #define LP_RAST_OP_TRIANGLE_4_16     0xc
 276 #define LP_RAST_OP_SHADE_TILE        0xd
 277 #define LP_RAST_OP_SHADE_TILE_OPAQUE 0xe
 278 #define LP_RAST_OP_BEGIN_QUERY       0xf
 279 #define LP_RAST_OP_END_QUERY         0x10
 280 #define LP_RAST_OP_SET_STATE         0x11
 281 #define LP_RAST_OP_TRIANGLE_32_1     0x12
 282 #define LP_RAST_OP_TRIANGLE_32_2     0x13
 283 #define LP_RAST_OP_TRIANGLE_32_3     0x14
 284 #define LP_RAST_OP_TRIANGLE_32_4     0x15
 285 #define LP_RAST_OP_TRIANGLE_32_5     0x16
 286 #define LP_RAST_OP_TRIANGLE_32_6     0x17
 287 #define LP_RAST_OP_TRIANGLE_32_7     0x18
 288 #define LP_RAST_OP_TRIANGLE_32_8     0x19
 289 #define LP_RAST_OP_TRIANGLE_32_3_4   0x1a
 290 #define LP_RAST_OP_TRIANGLE_32_3_16  0x1b
 291 #define LP_RAST_OP_TRIANGLE_32_4_16  0x1c
 292
 293 #define LP_RAST_OP_MAX               0x1d
 294 #define LP_RAST_OP_MASK              0xff
 295
 296 void
 297 lp_debug_bins( struct lp_scene *scene );
 298 void
 299 lp_debug_draw_bins_by_cmd_length( struct lp_scene *scene );
 300 void
 301 lp_debug_draw_bins_by_coverage( struct lp_scene *scene );
 302
 303
 304 #ifdef PIPE_ARCH_SSE
 305 #include <emmintrin.h>
 306 #include "util/u_sse.h"
 307
 308 static INLINE __m128i
 309 lp_plane_to_m128i(const struct lp_rast_plane *plane)
 310 {
 311    return _mm_setr_epi32((int32_t)plane->c, (int32_t)plane->dcdx,
 312                          (int32_t)plane->dcdy, (int32_t)plane->eo);
 313 }
 314
 315 #endif
 316
 317 #endif