src/gallium/drivers/llvmpipe/lp_rast_priv.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
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   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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  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 #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_tile_soa.h"
  36
  37
  38 #define MAX_THREADS 8  /* XXX probably temporary here */
  39
  40
  41 struct lp_rasterizer;
  42
  43
  44 /**
  45  * A tile's color and depth memory.
  46  * We can choose whatever layout for the internal tile storage we prefer.
  47  */
  48 struct lp_rast_tile
  49 {
  50    uint8_t *color[PIPE_MAX_COLOR_BUFS];
  51 };
  52
  53
  54 /**
  55  * Per-thread rasterization state
  56  */
  57 struct lp_rasterizer_task
  58 {
  59    struct lp_rast_tile tile;   /** Tile color/z/stencil memory */
  60
  61    unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
  62
  63    const struct lp_rast_state *current_state;
  64
  65    /** "back" pointer */
  66    struct lp_rasterizer *rast;
  67
  68    /** "my" index */
  69    unsigned thread_index;
  70
  71    pipe_semaphore work_ready;
  72    pipe_semaphore work_done;
  73 };
  74
  75
  76 /**
  77  * This is the state required while rasterizing tiles.
  78  * Note that this contains per-thread information too.
  79  * The tile size is TILE_SIZE x TILE_SIZE pixels.
  80  */
  81 struct lp_rasterizer
  82 {
  83    boolean exit_flag;
  84
  85    /* Framebuffer stuff
  86     */
  87    struct {
  88       void *map;
  89       unsigned stride;
  90       unsigned width;
  91       unsigned height;
  92       enum pipe_format format;
  93    } cbuf[PIPE_MAX_COLOR_BUFS];
  94
  95    struct {
  96       uint8_t *map;
  97       unsigned stride;
  98       unsigned blocksize;
  99    } zsbuf;
 100
 101    struct {
 102       unsigned nr_cbufs;
 103       boolean write_color;
 104       boolean write_zstencil;
 105       unsigned clear_color;
 106       unsigned clear_depth;
 107       char clear_stencil;
 108    } state;
 109
 110    /** The incoming queue of scenes ready to rasterize */
 111    struct lp_scene_queue *full_scenes;
 112
 113    /**
 114     * The outgoing queue of processed scenes to return to setup module
 115     *
 116     * XXX: while scenes are per-context but the rasterizer is
 117     * (potentially) shared, these empty scenes should be returned to
 118     * the context which created them rather than retained here.
 119     */
 120    struct lp_scene_queue *empty_scenes;
 121
 122    /** The scene currently being rasterized by the threads */
 123    struct lp_scene *curr_scene;
 124
 125    /** A task object for each rasterization thread */
 126    struct lp_rasterizer_task tasks[MAX_THREADS];
 127
 128    unsigned num_threads;
 129    pipe_thread threads[MAX_THREADS];
 130
 131    /** For synchronizing the rasterization threads */
 132    pipe_barrier barrier;
 133 };
 134
 135
 136 void lp_rast_shade_quads( struct lp_rasterizer_task *task,
 137                           const struct lp_rast_shader_inputs *inputs,
 138                           unsigned x, unsigned y,
 139                           int32_t c1, int32_t c2, int32_t c3);
 140
 141
 142 /**
 143  * Get the pointer to the depth buffer for a block.
 144  * \param x, y location of 4x4 block in window coords
 145  */
 146 static INLINE void *
 147 lp_rast_depth_pointer( struct lp_rasterizer *rast,
 148                        unsigned x, unsigned y )
 149 {
 150    void * depth;
 151
 152    assert((x % TILE_VECTOR_WIDTH) == 0);
 153    assert((y % TILE_VECTOR_HEIGHT) == 0);
 154
 155    if (!rast->zsbuf.map)
 156       return NULL;
 157
 158    depth = (rast->zsbuf.map +
 159             rast->zsbuf.stride * y +
 160             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 161
 162    assert(lp_check_alignment(depth, 16));
 163    return depth;
 164 }
 165
 166
 167
 168 /**
 169  * Shade all pixels in a 4x4 block.  The fragment code omits the
 170  * triangle in/out tests.
 171  * \param x, y location of 4x4 block in window coords
 172  */
 173 static INLINE void
 174 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 175                          const struct lp_rast_shader_inputs *inputs,
 176                          unsigned x, unsigned y )
 177 {
 178    struct lp_rasterizer *rast = task->rast;
 179    const struct lp_rast_state *state = task->current_state;
 180    struct lp_rast_tile *tile = &task->tile;
 181    const unsigned ix = x % TILE_SIZE, iy = y % TILE_SIZE;
 182    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 183    void *depth;
 184    unsigned block_offset, i;
 185
 186    /* offset of the containing 16x16 pixel block within the tile */
 187    block_offset = (iy / 4) * (16 * 16) + (ix / 4) * 16;
 188
 189    /* color buffer */
 190    for (i = 0; i < rast->state.nr_cbufs; i++)
 191       color[i] = tile->color[i] + 4 * block_offset;
 192
 193    depth = lp_rast_depth_pointer(rast, x, y);
 194
 195    /* run shader */
 196    state->jit_function[0]( &state->jit_context,
 197                            x, y,
 198                            inputs->facing,
 199                            inputs->a0,
 200                            inputs->dadx,
 201                            inputs->dady,
 202                            color,
 203                            depth,
 204                            INT_MIN, INT_MIN, INT_MIN,
 205                            NULL, NULL, NULL );
 206 }
 207
 208
 209 #endif