src/gallium/drivers/llvmpipe/lp_rast.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  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
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "util/u_memory.h"
  29
  30 #include "lp_state.h"
  31 #include "lp_quad.h"
  32 #include "lp_rast.h"
  33 #include "lp_rast_priv.h"
  34 #include "lp_tile_soa.h"
  35 #include "lp_bld_debug.h"
  36
  37
  38 struct lp_rasterizer *lp_rast_create( void )
  39 {
  40    return CALLOC_STRUCT(lp_rasterizer);
  41 }
  42
  43 void lp_rast_bind_surfaces( struct lp_rasterizer *rast,
  44                             struct pipe_surface *color,
  45                             struct pipe_surface *zstencil,
  46                             const float *clear_color,
  47                             double clear_depth,
  48                             unsigned clear_stencil)
  49 {
  50    pipe_surface_reference(&rast->state.color, color);
  51    pipe_surface_reference(&rast->state.depth, depth);
  52 }
  53
  54
  55 /* Begining of each tile:
  56  */
  57 void lp_rast_start_tile( struct lp_rasterizer *,
  58                          unsigned x,
  59                          unsigned y )
  60 {
  61    rast->x = x;
  62    rast->y = y;
  63 }
  64
  65 void lp_rast_clear_color( struct lp_rasterizer *rast,
  66                           const union lp_rast_cmd_arg *arg )
  67 {
  68    const unsigned clear_color = arg->clear.clear_color;
  69    unsigned i, j;
  70
  71    for (i = 0; i < TILESIZE; i++)
  72       for (j = 0; j < TILESIZE; j++)
  73          rast->tile[i][j] = clear_color;
  74 }
  75
  76 void lp_rast_clear_zstencil( struct lp_rasterizer *rast,
  77                              const union lp_rast_cmd_arg *arg)
  78 {
  79    const unsigned clear_color = arg->clear.clear_zstencil;
  80    unsigned i, j;
  81
  82    for (i = 0; i < TILESIZE; i++)
  83       for (j = 0; j < TILESIZE; j++)
  84          rast->tile[i][j] = clear_depth;
  85 }
  86
  87
  88 void lp_rast_load_color( struct lp_rasterizer *rast,
  89                          const union lp_rast_cmd_arg *arg)
  90 {
  91    /* call u_tile func to load colors from surface */
  92 }
  93
  94 void lp_rast_load_zstencil( struct lp_rasterizer *rast,
  95                             const union lp_rast_cmd_arg *arg )
  96 {
  97    /* call u_tile func to load depth (and stencil?) from surface */
  98 }
  99
 100 /* Within a tile:
 101  */
 102 void lp_rast_set_state( struct lp_rasterizer *rast,
 103                         const union lp_rast_cmd_arg *arg )
 104 {
 105    rast->shader_state = arg->state;
 106
 107 }
 108
 109
 110 void lp_rast_shade_tile( struct lp_rasterizer *rast,
 111                             const union lp_rast_cmd_arg *arg )
 112                          const struct lp_rast_shader_inputs *inputs )
 113 {
 114    /* Set up the silly quad coef pointers
 115     */
 116    for (i = 0; i < 4; i++) {
 117       rast->quads[i].posCoef = &inputs->posCoef;
 118       rast->quads[i].coef = inputs->coef;
 119    }
 120
 121    /* Use the existing preference for 8x2 (four quads) shading:
 122     */
 123    for (i = 0; i < TILESIZE; i += 8) {
 124       for (j = 0; j < TILESIZE; j += 2) {
 125          rast->shader_state.shade( inputs->jc,
 126                                    rast->x + i,
 127                                    rast->y + j,
 128                                    rast->quads, 4 );
 129       }
 130    }
 131 }
 132
 133
 134 void lp_rast_shade_quads( const struct lp_rast_state *state,
 135                           struct lp_rast_tile *tile,
 136                           struct quad_header **quads,
 137                           unsigned nr )
 138 {
 139    struct quad_header *quad = quads[0];
 140    const unsigned x = quad->input.x0;
 141    const unsigned y = quad->input.y0;
 142    uint8_t *color;
 143    uint8_t *depth;
 144    uint32_t ALIGN16_ATTRIB mask[4][NUM_CHANNELS];
 145    unsigned chan_index;
 146    unsigned q;
 147
 148    /* Sanity checks */
 149    assert(nr * QUAD_SIZE == TILE_VECTOR_HEIGHT * TILE_VECTOR_WIDTH);
 150    assert(x % TILE_VECTOR_WIDTH == 0);
 151    assert(y % TILE_VECTOR_HEIGHT == 0);
 152    for (q = 0; q < nr; ++q) {
 153       assert(quads[q]->input.x0 == x + q*2);
 154       assert(quads[q]->input.y0 == y);
 155    }
 156
 157    /* mask */
 158    for (q = 0; q < 4; ++q)
 159       for (chan_index = 0; chan_index < NUM_CHANNELS; ++chan_index)
 160          mask[q][chan_index] = quads[q]->inout.mask & (1 << chan_index) ? ~0 : 0;
 161
 162    /* color buffer */
 163    color = &TILE_PIXEL(tile->color, x, y, 0);
 164
 165    /* depth buffer */
 166    assert((x % 2) == 0);
 167    assert((y % 2) == 0);
 168    depth = (uint8_t *)tile->depth + y*TILE_SIZE*4 + 2*x*4;
 169
 170    /* XXX: This will most likely fail on 32bit x86 without -mstackrealign */
 171    assert(lp_check_alignment(mask, 16));
 172
 173    assert(lp_check_alignment(depth, 16));
 174    assert(lp_check_alignment(color, 16));
 175    assert(lp_check_alignment(state->jc.blend_color, 16));
 176
 177    /* run shader */
 178    state->shader( &state->jc,
 179                   x, y,
 180                   quad->coef->a0,
 181                   quad->coef->dadx,
 182                   quad->coef->dady,
 183                   &mask[0][0],
 184                   color,
 185                   depth);
 186
 187 }
 188
 189
 190 /* End of tile:
 191  */
 192 void lp_rast_end_tile( struct lp_rasterizer *rast,
 193                        boolean write_depth )
 194 {
 195    /* call u_tile func to store colors to surface */
 196
 197    if (write_depth) {
 198       /* call u_tile func to store depth/stencil to surface */
 199    }
 200 }
 201
 202 /* Shutdown:
 203  */
 204 void lp_rast_destroy( struct lp_rasterizer *rast )
 205 {
 206    FREE(rast);
 207 }
 208