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_scene.h"
  36 #include "lp_texture.h"
  37 #include "lp_tile_soa.h"
  38
  39
  40 #define MAX_THREADS 8  /* XXX probably temporary here */
  41
  42
  43 struct lp_rasterizer;
  44
  45
  46 /**
  47  * Per-thread rasterization state
  48  */
  49 struct lp_rasterizer_task
  50 {
  51    unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
  52
  53    uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];
  54    uint8_t *depth_tile;
  55
  56    const struct lp_rast_state *current_state;
  57
  58    /** "back" pointer */
  59    struct lp_rasterizer *rast;
  60
  61    /** "my" index */
  62    unsigned thread_index;
  63
  64    pipe_semaphore work_ready;
  65    pipe_semaphore work_done;
  66 };
  67
  68
  69 /**
  70  * This is the state required while rasterizing tiles.
  71  * Note that this contains per-thread information too.
  72  * The tile size is TILE_SIZE x TILE_SIZE pixels.
  73  */
  74 struct lp_rasterizer
  75 {
  76    boolean exit_flag;
  77
  78    /* Framebuffer stuff
  79     */
  80    struct {
  81       void *map;
  82       unsigned tiles_per_row;
  83       unsigned blocksize;
  84       enum pipe_format format;
  85    } cbuf[PIPE_MAX_COLOR_BUFS];
  86
  87    struct {
  88       uint8_t *map;
  89       unsigned stride;
  90       unsigned blocksize;
  91    } zsbuf;
  92
  93    struct {
  94       unsigned nr_cbufs;
  95       unsigned clear_color;
  96       unsigned clear_depth;
  97       char clear_stencil;
  98    } state;
  99
 100    /** The incoming queue of scenes ready to rasterize */
 101    struct lp_scene_queue *full_scenes;
 102
 103    /**
 104     * The outgoing queue of processed scenes to return to setup module
 105     *
 106     * XXX: while scenes are per-context but the rasterizer is
 107     * (potentially) shared, these empty scenes should be returned to
 108     * the context which created them rather than retained here.
 109     */
 110    struct lp_scene_queue *empty_scenes;
 111
 112    /** The scene currently being rasterized by the threads */
 113    struct lp_scene *curr_scene;
 114
 115    /** A task object for each rasterization thread */
 116    struct lp_rasterizer_task tasks[MAX_THREADS];
 117
 118    unsigned num_threads;
 119    pipe_thread threads[MAX_THREADS];
 120
 121    /** For synchronizing the rasterization threads */
 122    pipe_barrier barrier;
 123 };
 124
 125
 126 void lp_rast_shade_quads( struct lp_rasterizer_task *task,
 127                           const struct lp_rast_shader_inputs *inputs,
 128                           unsigned x, unsigned y,
 129                           int32_t c1, int32_t c2, int32_t c3);
 130
 131
 132 /**
 133  * Get the pointer to a 4x4 depth/stencil block.
 134  * We'll map the z/stencil buffer on demand here.
 135  * Note that this may be called even when there's no z/stencil buffer - return
 136  * NULL in that case.
 137  * \param x, y location of 4x4 block in window coords
 138  */
 139 static INLINE void *
 140 lp_rast_get_depth_block_pointer(const struct lp_rasterizer *rast,
 141                                 unsigned x, unsigned y)
 142 {
 143    void *depth;
 144
 145    assert((x % TILE_VECTOR_WIDTH) == 0);
 146    assert((y % TILE_VECTOR_HEIGHT) == 0);
 147
 148    assert(rast->zsbuf.map || !rast->curr_scene->fb.zsbuf);
 149
 150    if (!rast->zsbuf.map)
 151       return NULL;
 152
 153    depth = (rast->zsbuf.map +
 154             rast->zsbuf.stride * y +
 155             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 156
 157    assert(lp_check_alignment(depth, 16));
 158    return depth;
 159 }
 160
 161
 162 /**
 163  * Get the pointer to a 4x4 color block (within a 64x64 tile).
 164  * We'll map the color buffer on demand here.
 165  * Note that this may be called even when there's no color buffers - return
 166  * NULL in that case.
 167  * \param x, y location of 4x4 block in window coords
 168  */
 169 static INLINE uint8_t *
 170 lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
 171                                 unsigned buf, unsigned x, unsigned y)
 172 {
 173    unsigned px, py, pixel_offset;
 174    uint8_t *color;
 175
 176    assert((x % TILE_VECTOR_WIDTH) == 0);
 177    assert((y % TILE_VECTOR_HEIGHT) == 0);
 178
 179    color = task->color_tiles[buf];
 180    assert(color);
 181
 182    px = x % TILE_SIZE;
 183    py = y % TILE_SIZE;
 184    pixel_offset = tile_pixel_offset(px, py, 0);
 185
 186    color = color + pixel_offset;
 187
 188    assert(lp_check_alignment(color, 16));
 189    return color;
 190 }
 191
 192
 193
 194 /**
 195  * Shade all pixels in a 4x4 block.  The fragment code omits the
 196  * triangle in/out tests.
 197  * \param x, y location of 4x4 block in window coords
 198  */
 199 static INLINE void
 200 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 201                          const struct lp_rast_shader_inputs *inputs,
 202                          unsigned x, unsigned y )
 203 {
 204    struct lp_rasterizer *rast = task->rast;
 205    const struct lp_rast_state *state = task->current_state;
 206    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 207    void *depth;
 208    unsigned i;
 209
 210    /* color buffer */
 211    for (i = 0; i < rast->state.nr_cbufs; i++)
 212       color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
 213
 214    depth = lp_rast_get_depth_block_pointer(rast, x, y);
 215
 216    /* run shader on 4x4 block */
 217    state->jit_function[RAST_WHOLE]( &state->jit_context,
 218                                     x, y,
 219                                     inputs->facing,
 220                                     inputs->a0,
 221                                     inputs->dadx,
 222                                     inputs->dady,
 223                                     color,
 224                                     depth,
 225                                     INT_MIN, INT_MIN, INT_MIN,
 226                                     NULL, NULL, NULL );
 227 }
 228
 229
 230 #endif