src/gallium/drivers/llvmpipe/lp_rast_priv.h

   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 #ifndef LP_RAST_PRIV_H
  29 #define LP_RAST_PRIV_H
  30
  31 #include "os/os_thread.h"
  32 #include "util/u_format.h"
  33 #include "gallivm/lp_bld_debug.h"
  34 #include "lp_memory.h"
  35 #include "lp_rast.h"
  36 #include "lp_scene.h"
  37 #include "lp_state.h"
  38 #include "lp_texture.h"
  39 #include "lp_tile_soa.h"
  40 #include "lp_limits.h"
  41
  42
  43 struct lp_rasterizer;
  44
  45
  46 /**
  47  * Per-thread rasterization state
  48  */
  49 struct lp_rasterizer_task
  50 {
  51    unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
  52
  53    uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];
  54    uint8_t *depth_tile;
  55
  56    const struct lp_rast_state *current_state;
  57
  58    /** "back" pointer */
  59    struct lp_rasterizer *rast;
  60
  61    /** "my" index */
  62    unsigned thread_index;
  63
  64    /* occlude counter for visiable pixels */
  65    uint32_t vis_counter;
  66
  67    pipe_semaphore work_ready;
  68    pipe_semaphore work_done;
  69 };
  70
  71
  72 /**
  73  * This is the state required while rasterizing tiles.
  74  * Note that this contains per-thread information too.
  75  * The tile size is TILE_SIZE x TILE_SIZE pixels.
  76  */
  77 struct lp_rasterizer
  78 {
  79    boolean exit_flag;
  80
  81    /* Framebuffer stuff
  82     */
  83    struct {
  84       uint8_t *map;
  85       unsigned stride;
  86       unsigned blocksize;
  87    } zsbuf;
  88
  89    struct {
  90       unsigned nr_cbufs;
  91       unsigned clear_color;
  92       unsigned clear_depth;
  93       char clear_stencil;
  94    } state;
  95
  96    /** The incoming queue of scenes ready to rasterize */
  97    struct lp_scene_queue *full_scenes;
  98
  99    /**
 100     * The outgoing queue of processed scenes to return to setup module
 101     *
 102     * XXX: while scenes are per-context but the rasterizer is
 103     * (potentially) shared, these empty scenes should be returned to
 104     * the context which created them rather than retained here.
 105     */
 106    /*   struct lp_scene_queue *empty_scenes; */
 107
 108    /** The scene currently being rasterized by the threads */
 109    struct lp_scene *curr_scene;
 110
 111    /** A task object for each rasterization thread */
 112    struct lp_rasterizer_task tasks[LP_MAX_THREADS];
 113
 114    unsigned num_threads;
 115    pipe_thread threads[LP_MAX_THREADS];
 116
 117    /** For synchronizing the rasterization threads */
 118    pipe_barrier barrier;
 119 };
 120
 121
 122 void
 123 lp_rast_shade_quads_mask(struct lp_rasterizer_task *task,
 124                          const struct lp_rast_shader_inputs *inputs,
 125                          unsigned x, unsigned y,
 126                          unsigned mask);
 127
 128
 129
 130 /**
 131  * Get the pointer to a 4x4 depth/stencil block.
 132  * We'll map the z/stencil buffer on demand here.
 133  * Note that this may be called even when there's no z/stencil buffer - return
 134  * NULL in that case.
 135  * \param x, y location of 4x4 block in window coords
 136  */
 137 static INLINE void *
 138 lp_rast_get_depth_block_pointer(struct lp_rasterizer_task *task,
 139                                 unsigned x, unsigned y)
 140 {
 141    const struct lp_rasterizer *rast = task->rast;
 142    void *depth;
 143
 144    assert((x % TILE_VECTOR_WIDTH) == 0);
 145    assert((y % TILE_VECTOR_HEIGHT) == 0);
 146
 147    if (!rast->zsbuf.map && (task->current_state->variant->key.depth.enabled ||
 148                             task->current_state->variant->key.stencil[0].enabled)) {
 149       /* out of memory - use dummy tile memory */
 150       return lp_get_dummy_tile();
 151    }
 152
 153    depth = (rast->zsbuf.map +
 154             rast->zsbuf.stride * y +
 155             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 156
 157    assert(lp_check_alignment(depth, 16));
 158    return depth;
 159 }
 160
 161
 162 /**
 163  * Get pointer to the swizzled color tile
 164  */
 165 static INLINE uint8_t *
 166 lp_rast_get_color_tile_pointer(struct lp_rasterizer_task *task,
 167                                unsigned buf, enum lp_texture_usage usage)
 168 {
 169    struct lp_rasterizer *rast = task->rast;
 170
 171    assert(task->x % TILE_SIZE == 0);
 172    assert(task->y % TILE_SIZE == 0);
 173    assert(buf < rast->state.nr_cbufs);
 174
 175    if (!task->color_tiles[buf]) {
 176       struct pipe_surface *cbuf = rast->curr_scene->fb.cbufs[buf];
 177       struct llvmpipe_resource *lpt;
 178       assert(cbuf);
 179       lpt = llvmpipe_resource(cbuf->texture);
 180       task->color_tiles[buf] = llvmpipe_get_texture_tile(lpt,
 181                                                          cbuf->face + cbuf->zslice,
 182                                                          cbuf->level,
 183                                                          usage,
 184                                                          task->x,
 185                                                          task->y);
 186       if (!task->color_tiles[buf]) {
 187          /* out of memory - use dummy tile memory */
 188          return lp_get_dummy_tile();
 189       }
 190    }
 191
 192    return task->color_tiles[buf];
 193 }
 194
 195
 196 /**
 197  * Get the pointer to a 4x4 color block (within a 64x64 tile).
 198  * We'll map the color buffer on demand here.
 199  * Note that this may be called even when there's no color buffers - return
 200  * NULL in that case.
 201  * \param x, y location of 4x4 block in window coords
 202  */
 203 static INLINE uint8_t *
 204 lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
 205                                 unsigned buf, unsigned x, unsigned y)
 206 {
 207    unsigned px, py, pixel_offset;
 208    uint8_t *color;
 209
 210    assert((x % TILE_VECTOR_WIDTH) == 0);
 211    assert((y % TILE_VECTOR_HEIGHT) == 0);
 212
 213    color = lp_rast_get_color_tile_pointer(task, buf, LP_TEX_USAGE_READ_WRITE);
 214    color = task->color_tiles[buf];
 215    if (!color) {
 216       /* out of memory - use dummy tile memory */
 217       return lp_get_dummy_tile();
 218    }
 219
 220    px = x % TILE_SIZE;
 221    py = y % TILE_SIZE;
 222    pixel_offset = tile_pixel_offset(px, py, 0);
 223
 224    color = color + pixel_offset;
 225
 226    assert(lp_check_alignment(color, 16));
 227    return color;
 228 }
 229
 230
 231
 232 /**
 233  * Shade all pixels in a 4x4 block.  The fragment code omits the
 234  * triangle in/out tests.
 235  * \param x, y location of 4x4 block in window coords
 236  */
 237 static INLINE void
 238 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 239                          const struct lp_rast_shader_inputs *inputs,
 240                          unsigned x, unsigned y )
 241 {
 242    const struct lp_rasterizer *rast = task->rast;
 243    const struct lp_rast_state *state = task->current_state;
 244    struct lp_fragment_shader_variant *variant = state->variant;
 245    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 246    void *depth;
 247    unsigned i;
 248
 249    /* color buffer */
 250    for (i = 0; i < rast->state.nr_cbufs; i++)
 251       color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
 252
 253    depth = lp_rast_get_depth_block_pointer(task, x, y);
 254
 255    /* run shader on 4x4 block */
 256    variant->jit_function[RAST_WHOLE]( &state->jit_context,
 257                                       x, y,
 258                                       inputs->facing,
 259                                       inputs->a0,
 260                                       inputs->dadx,
 261                                       inputs->dady,
 262                                       color,
 263                                       depth,
 264                                       0xffff,
 265                                       &task->vis_counter );
 266 }
 267
 268
 269 #endif