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 "pipe/p_thread.h"
  32 #include "lp_rast.h"
  33 #include "lp_tile_soa.h"
  34
  35
  36 #define MAX_THREADS 8  /* XXX probably temporary here */
  37
  38
  39 struct pipe_transfer;
  40 struct pipe_screen;
  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    uint32_t *depth;
  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
  88    /* Framebuffer stuff
  89     */
  90    struct pipe_screen *screen;
  91    struct pipe_transfer *cbuf_transfer[PIPE_MAX_COLOR_BUFS];
  92    struct pipe_transfer *zsbuf_transfer;
  93    void *cbuf_map[PIPE_MAX_COLOR_BUFS];
  94    void *zsbuf_map;
  95
  96    struct {
  97       struct pipe_framebuffer_state fb;
  98       boolean write_color;
  99       boolean write_zstencil;
 100       unsigned clear_color;
 101       unsigned clear_depth;
 102       char clear_stencil;
 103    } state;
 104
 105    /** The incoming queue of scenes ready to rasterize */
 106    struct lp_scene_queue *full_scenes;
 107    /** The outgoing queue of processed scenes to return to setup modulee */
 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[MAX_THREADS];
 115
 116    unsigned num_threads;
 117    pipe_thread threads[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 *rast,
 125                           unsigned thread_index,
 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  * Shade all pixels in a 4x4 block.  The fragment code omits the
 133  * triangle in/out tests.
 134  * \param x, y location of 4x4 block in window coords
 135  */
 136 static INLINE void
 137 lp_rast_shade_quads_all( struct lp_rasterizer *rast,
 138                          unsigned thread_index,
 139                          const struct lp_rast_shader_inputs *inputs,
 140                          unsigned x, unsigned y )
 141 {
 142    const struct lp_rast_state *state = rast->tasks[thread_index].current_state;
 143    struct lp_rast_tile *tile = &rast->tasks[thread_index].tile;
 144    const unsigned ix = x % TILE_SIZE, iy = y % TILE_SIZE;
 145    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 146    void *depth;
 147    unsigned block_offset, i;
 148
 149    /* offset of the containing 16x16 pixel block within the tile */
 150    block_offset = (iy / 4) * (16 * 16) + (ix / 4) * 16;
 151
 152    /* color buffer */
 153    for (i = 0; i < rast->state.fb.nr_cbufs; i++)
 154       color[i] = tile->color[i] + 4 * block_offset;
 155
 156    /* depth buffer */
 157    depth = tile->depth + block_offset;
 158
 159    /* run shader */
 160    state->jit_function[0]( &state->jit_context,
 161                            x, y,
 162                            inputs->a0,
 163                            inputs->dadx,
 164                            inputs->dady,
 165                            color,
 166                            depth,
 167                            INT_MIN, INT_MIN, INT_MIN,
 168                            NULL, NULL, NULL );
 169 }
 170
 171
 172 #endif