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
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   9  * without limitation the rights to use, copy, modify, merge, publish,
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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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  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_rast.h"
  35 #include "lp_scene.h"
  36 #include "lp_texture.h"
  37 #include "lp_tile_soa.h"
  38 #include "lp_limits.h"
  39
  40
  41 struct lp_rasterizer;
  42
  43
  44 /**
  45  * Per-thread rasterization state
  46  */
  47 struct lp_rasterizer_task
  48 {
  49    unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
  50
  51    uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];
  52    uint8_t *depth_tile;
  53
  54    const struct lp_rast_state *current_state;
  55
  56    /** "back" pointer */
  57    struct lp_rasterizer *rast;
  58
  59    /** "my" index */
  60    unsigned thread_index;
  61
  62    pipe_semaphore work_ready;
  63    pipe_semaphore work_done;
  64 };
  65
  66
  67 /**
  68  * This is the state required while rasterizing tiles.
  69  * Note that this contains per-thread information too.
  70  * The tile size is TILE_SIZE x TILE_SIZE pixels.
  71  */
  72 struct lp_rasterizer
  73 {
  74    boolean exit_flag;
  75
  76    /* Framebuffer stuff
  77     */
  78    struct {
  79       void *map;
  80       unsigned tiles_per_row;
  81       unsigned blocksize;
  82       enum pipe_format format;
  83    } cbuf[PIPE_MAX_COLOR_BUFS];
  84
  85    struct {
  86       uint8_t *map;
  87       unsigned stride;
  88       unsigned blocksize;
  89    } zsbuf;
  90
  91    struct {
  92       unsigned nr_cbufs;
  93       unsigned clear_color;
  94       unsigned clear_depth;
  95       char clear_stencil;
  96    } state;
  97
  98    /** The incoming queue of scenes ready to rasterize */
  99    struct lp_scene_queue *full_scenes;
 100
 101    /**
 102     * The outgoing queue of processed scenes to return to setup module
 103     *
 104     * XXX: while scenes are per-context but the rasterizer is
 105     * (potentially) shared, these empty scenes should be returned to
 106     * the context which created them rather than retained here.
 107     */
 108    struct lp_scene_queue *empty_scenes;
 109
 110    /** The scene currently being rasterized by the threads */
 111    struct lp_scene *curr_scene;
 112
 113    /** A task object for each rasterization thread */
 114    struct lp_rasterizer_task tasks[LP_MAX_THREADS];
 115
 116    unsigned num_threads;
 117    pipe_thread threads[LP_MAX_THREADS];
 118
 119    /** For synchronizing the rasterization threads */
 120    pipe_barrier barrier;
 121 };
 122
 123
 124 void lp_rast_shade_quads( struct lp_rasterizer_task *task,
 125                           const struct lp_rast_shader_inputs *inputs,
 126                           unsigned x, unsigned y,
 127                           int32_t c1, int32_t c2, int32_t c3);
 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(const struct lp_rasterizer *rast,
 139                                 unsigned x, unsigned y)
 140 {
 141    void *depth;
 142
 143    assert((x % TILE_VECTOR_WIDTH) == 0);
 144    assert((y % TILE_VECTOR_HEIGHT) == 0);
 145
 146    assert(rast->zsbuf.map || !rast->curr_scene->fb.zsbuf);
 147
 148    if (!rast->zsbuf.map)
 149       return NULL;
 150
 151    depth = (rast->zsbuf.map +
 152             rast->zsbuf.stride * y +
 153             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 154
 155    assert(lp_check_alignment(depth, 16));
 156    return depth;
 157 }
 158
 159
 160 /**
 161  * Get the pointer to a 4x4 color block (within a 64x64 tile).
 162  * We'll map the color buffer on demand here.
 163  * Note that this may be called even when there's no color buffers - return
 164  * NULL in that case.
 165  * \param x, y location of 4x4 block in window coords
 166  */
 167 static INLINE uint8_t *
 168 lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
 169                                 unsigned buf, unsigned x, unsigned y)
 170 {
 171    unsigned px, py, pixel_offset;
 172    uint8_t *color;
 173
 174    assert((x % TILE_VECTOR_WIDTH) == 0);
 175    assert((y % TILE_VECTOR_HEIGHT) == 0);
 176
 177    color = task->color_tiles[buf];
 178    assert(color);
 179
 180    px = x % TILE_SIZE;
 181    py = y % TILE_SIZE;
 182    pixel_offset = tile_pixel_offset(px, py, 0);
 183
 184    color = color + pixel_offset;
 185
 186    assert(lp_check_alignment(color, 16));
 187    return color;
 188 }
 189
 190
 191
 192 /**
 193  * Shade all pixels in a 4x4 block.  The fragment code omits the
 194  * triangle in/out tests.
 195  * \param x, y location of 4x4 block in window coords
 196  */
 197 static INLINE void
 198 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 199                          const struct lp_rast_shader_inputs *inputs,
 200                          unsigned x, unsigned y )
 201 {
 202    struct lp_rasterizer *rast = task->rast;
 203    const struct lp_rast_state *state = task->current_state;
 204    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 205    void *depth;
 206    unsigned i;
 207
 208    /* color buffer */
 209    for (i = 0; i < rast->state.nr_cbufs; i++)
 210       color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
 211
 212    depth = lp_rast_get_depth_block_pointer(rast, x, y);
 213
 214    /* run shader on 4x4 block */
 215    state->jit_function[RAST_WHOLE]( &state->jit_context,
 216                                     x, y,
 217                                     inputs->facing,
 218                                     inputs->a0,
 219                                     inputs->dadx,
 220                                     inputs->dady,
 221                                     color,
 222                                     depth,
 223                                     INT_MIN, INT_MIN, INT_MIN,
 224                                     NULL, NULL, NULL );
 225 }
 226
 227
 228 #endif