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
   9  * without limitation the rights to use, copy, modify, merge, publish,
  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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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  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_scene.h"
  36 #include "lp_state.h"
  37 #include "lp_texture.h"
  38 #include "lp_tile_soa.h"
  39 #include "lp_limits.h"
  40
  41
  42 struct lp_rasterizer;
  43
  44
  45 /**
  46  * Per-thread rasterization state
  47  */
  48 struct lp_rasterizer_task
  49 {
  50    unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
  51
  52    uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];
  53    uint8_t *depth_tile;
  54
  55    const struct lp_rast_state *current_state;
  56
  57    /** "back" pointer */
  58    struct lp_rasterizer *rast;
  59
  60    /** "my" index */
  61    unsigned thread_index;
  62
  63    /* occlude counter for visiable pixels */
  64    uint32_t vis_counter;
  65
  66    pipe_semaphore work_ready;
  67    pipe_semaphore work_done;
  68 };
  69
  70
  71 /**
  72  * This is the state required while rasterizing tiles.
  73  * Note that this contains per-thread information too.
  74  * The tile size is TILE_SIZE x TILE_SIZE pixels.
  75  */
  76 struct lp_rasterizer
  77 {
  78    boolean exit_flag;
  79
  80    /* Framebuffer stuff
  81     */
  82    struct {
  83       uint8_t *map;
  84       unsigned stride;
  85       unsigned blocksize;
  86    } zsbuf;
  87
  88    struct {
  89       unsigned nr_cbufs;
  90       unsigned clear_color;
  91       unsigned clear_depth;
  92       char clear_stencil;
  93    } state;
  94
  95    /** The incoming queue of scenes ready to rasterize */
  96    struct lp_scene_queue *full_scenes;
  97
  98    /**
  99     * The outgoing queue of processed scenes to return to setup module
 100     *
 101     * XXX: while scenes are per-context but the rasterizer is
 102     * (potentially) shared, these empty scenes should be returned to
 103     * the context which created them rather than retained here.
 104     */
 105    /*   struct lp_scene_queue *empty_scenes; */
 106
 107    /** The scene currently being rasterized by the threads */
 108    struct lp_scene *curr_scene;
 109
 110    /** A task object for each rasterization thread */
 111    struct lp_rasterizer_task tasks[LP_MAX_THREADS];
 112
 113    unsigned num_threads;
 114    pipe_thread threads[LP_MAX_THREADS];
 115
 116    /** For synchronizing the rasterization threads */
 117    pipe_barrier barrier;
 118 };
 119
 120
 121 void lp_rast_shade_quads( struct lp_rasterizer_task *task,
 122                           const struct lp_rast_shader_inputs *inputs,
 123                           unsigned x, unsigned y,
 124                           int32_t c1, int32_t c2, int32_t c3);
 125
 126
 127 /**
 128  * Get the pointer to a 4x4 depth/stencil block.
 129  * We'll map the z/stencil buffer on demand here.
 130  * Note that this may be called even when there's no z/stencil buffer - return
 131  * NULL in that case.
 132  * \param x, y location of 4x4 block in window coords
 133  */
 134 static INLINE void *
 135 lp_rast_get_depth_block_pointer(const struct lp_rasterizer *rast,
 136                                 unsigned x, unsigned y)
 137 {
 138    void *depth;
 139
 140    assert((x % TILE_VECTOR_WIDTH) == 0);
 141    assert((y % TILE_VECTOR_HEIGHT) == 0);
 142
 143    assert(rast->zsbuf.map || !rast->curr_scene->fb.zsbuf);
 144
 145    if (!rast->zsbuf.map)
 146       return NULL;
 147
 148    depth = (rast->zsbuf.map +
 149             rast->zsbuf.stride * y +
 150             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 151
 152    assert(lp_check_alignment(depth, 16));
 153    return depth;
 154 }
 155
 156
 157 /**
 158  * Get the pointer to a 4x4 color block (within a 64x64 tile).
 159  * We'll map the color buffer on demand here.
 160  * Note that this may be called even when there's no color buffers - return
 161  * NULL in that case.
 162  * \param x, y location of 4x4 block in window coords
 163  */
 164 static INLINE uint8_t *
 165 lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
 166                                 unsigned buf, unsigned x, unsigned y)
 167 {
 168    unsigned px, py, pixel_offset;
 169    uint8_t *color;
 170
 171    assert((x % TILE_VECTOR_WIDTH) == 0);
 172    assert((y % TILE_VECTOR_HEIGHT) == 0);
 173
 174    color = task->color_tiles[buf];
 175    assert(color);
 176
 177    px = x % TILE_SIZE;
 178    py = y % TILE_SIZE;
 179    pixel_offset = tile_pixel_offset(px, py, 0);
 180
 181    color = color + pixel_offset;
 182
 183    assert(lp_check_alignment(color, 16));
 184    return color;
 185 }
 186
 187
 188
 189 /**
 190  * Shade all pixels in a 4x4 block.  The fragment code omits the
 191  * triangle in/out tests.
 192  * \param x, y location of 4x4 block in window coords
 193  */
 194 static INLINE void
 195 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 196                          const struct lp_rast_shader_inputs *inputs,
 197                          unsigned x, unsigned y )
 198 {
 199    struct lp_rasterizer *rast = task->rast;
 200    const struct lp_rast_state *state = task->current_state;
 201    struct lp_fragment_shader_variant *variant = state->variant;
 202    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 203    void *depth;
 204    unsigned i;
 205
 206    /* color buffer */
 207    for (i = 0; i < rast->state.nr_cbufs; i++)
 208       color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
 209
 210    depth = lp_rast_get_depth_block_pointer(rast, x, y);
 211
 212    /* run shader on 4x4 block */
 213    variant->jit_function[RAST_WHOLE]( &state->jit_context,
 214                                     x, y,
 215                                     inputs->facing,
 216                                     inputs->a0,
 217                                     inputs->dadx,
 218                                     inputs->dady,
 219                                     color,
 220                                     depth,
 221                                     INT_MIN, INT_MIN, INT_MIN,
 222                                     NULL, NULL, NULL, &task->vis_counter );
 223 }
 224
 225
 226 #endif