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