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
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  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
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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_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
  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    uint8_t *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_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 the depth buffer for a block.
 132  * \param x, y location of 4x4 block in window coords
 133  */
 134 static INLINE void *
 135 lp_rast_depth_pointer( struct lp_rasterizer *rast,
 136                        unsigned x, unsigned y )
 137 {
 138    void * depth;
 139    assert((x % TILE_VECTOR_WIDTH) == 0);
 140    assert((y % TILE_VECTOR_HEIGHT) == 0);
 141    if(!rast->zsbuf_map)
 142       return NULL;
 143    assert(rast->zsbuf_transfer);
 144    depth = rast->zsbuf_map +
 145            y*rast->zsbuf_transfer->stride +
 146            TILE_VECTOR_HEIGHT*x*util_format_get_blocksize(rast->zsbuf_transfer->texture->format);
 147 #ifdef DEBUG
 148    assert(lp_check_alignment(depth, 16));
 149 #endif
 150    return depth;
 151 }
 152
 153
 154
 155 /**
 156  * Shade all pixels in a 4x4 block.  The fragment code omits the
 157  * triangle in/out tests.
 158  * \param x, y location of 4x4 block in window coords
 159  */
 160 static INLINE void
 161 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 162                          const struct lp_rast_shader_inputs *inputs,
 163                          unsigned x, unsigned y )
 164 {
 165    struct lp_rasterizer *rast = task->rast;
 166    const struct lp_rast_state *state = task->current_state;
 167    struct lp_rast_tile *tile = &task->tile;
 168    const unsigned ix = x % TILE_SIZE, iy = y % TILE_SIZE;
 169    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 170    void *depth;
 171    unsigned block_offset, i;
 172
 173    /* offset of the containing 16x16 pixel block within the tile */
 174    block_offset = (iy / 4) * (16 * 16) + (ix / 4) * 16;
 175
 176    /* color buffer */
 177    for (i = 0; i < rast->state.fb.nr_cbufs; i++)
 178       color[i] = tile->color[i] + 4 * block_offset;
 179
 180    depth = lp_rast_depth_pointer(rast, x, y);
 181
 182    /* run shader */
 183    state->jit_function[0]( &state->jit_context,
 184                            x, y,
 185                            inputs->a0,
 186                            inputs->dadx,
 187                            inputs->dady,
 188                            color,
 189                            depth,
 190                            INT_MIN, INT_MIN, INT_MIN,
 191                            NULL, NULL, NULL );
 192 }
 193
 194
 195 #endif