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       void *map;
  84       unsigned tiles_per_row;
  85       unsigned blocksize;
  86       enum pipe_format format;
  87    } cbuf[PIPE_MAX_COLOR_BUFS];
  88
  89    struct {
  90       uint8_t *map;
  91       unsigned stride;
  92       unsigned blocksize;
  93    } zsbuf;
  94
  95    struct {
  96       unsigned nr_cbufs;
  97       unsigned clear_color;
  98       unsigned clear_depth;
  99       char clear_stencil;
 100    } state;
 101
 102    /** The incoming queue of scenes ready to rasterize */
 103    struct lp_scene_queue *full_scenes;
 104
 105    /**
 106     * The outgoing queue of processed scenes to return to setup module
 107     *
 108     * XXX: while scenes are per-context but the rasterizer is
 109     * (potentially) shared, these empty scenes should be returned to
 110     * the context which created them rather than retained here.
 111     */
 112    /*   struct lp_scene_queue *empty_scenes; */
 113
 114    /** The scene currently being rasterized by the threads */
 115    struct lp_scene *curr_scene;
 116
 117    /** A task object for each rasterization thread */
 118    struct lp_rasterizer_task tasks[LP_MAX_THREADS];
 119
 120    unsigned num_threads;
 121    pipe_thread threads[LP_MAX_THREADS];
 122
 123    /** For synchronizing the rasterization threads */
 124    pipe_barrier barrier;
 125 };
 126
 127
 128 void lp_rast_shade_quads( struct lp_rasterizer_task *task,
 129                           const struct lp_rast_shader_inputs *inputs,
 130                           unsigned x, unsigned y,
 131                           int32_t c1, int32_t c2, int32_t c3);
 132
 133
 134 /**
 135  * Get the pointer to a 4x4 depth/stencil block.
 136  * We'll map the z/stencil buffer on demand here.
 137  * Note that this may be called even when there's no z/stencil buffer - return
 138  * NULL in that case.
 139  * \param x, y location of 4x4 block in window coords
 140  */
 141 static INLINE void *
 142 lp_rast_get_depth_block_pointer(const struct lp_rasterizer *rast,
 143                                 unsigned x, unsigned y)
 144 {
 145    void *depth;
 146
 147    assert((x % TILE_VECTOR_WIDTH) == 0);
 148    assert((y % TILE_VECTOR_HEIGHT) == 0);
 149
 150    assert(rast->zsbuf.map || !rast->curr_scene->fb.zsbuf);
 151
 152    if (!rast->zsbuf.map)
 153       return NULL;
 154
 155    depth = (rast->zsbuf.map +
 156             rast->zsbuf.stride * y +
 157             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 158
 159    assert(lp_check_alignment(depth, 16));
 160    return depth;
 161 }
 162
 163
 164 /**
 165  * Get the pointer to a 4x4 color block (within a 64x64 tile).
 166  * We'll map the color buffer on demand here.
 167  * Note that this may be called even when there's no color buffers - return
 168  * NULL in that case.
 169  * \param x, y location of 4x4 block in window coords
 170  */
 171 static INLINE uint8_t *
 172 lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
 173                                 unsigned buf, unsigned x, unsigned y)
 174 {
 175    unsigned px, py, pixel_offset;
 176    uint8_t *color;
 177
 178    assert((x % TILE_VECTOR_WIDTH) == 0);
 179    assert((y % TILE_VECTOR_HEIGHT) == 0);
 180
 181    color = task->color_tiles[buf];
 182    assert(color);
 183
 184    px = x % TILE_SIZE;
 185    py = y % TILE_SIZE;
 186    pixel_offset = tile_pixel_offset(px, py, 0);
 187
 188    color = color + pixel_offset;
 189
 190    assert(lp_check_alignment(color, 16));
 191    return color;
 192 }
 193
 194
 195
 196 /**
 197  * Shade all pixels in a 4x4 block.  The fragment code omits the
 198  * triangle in/out tests.
 199  * \param x, y location of 4x4 block in window coords
 200  */
 201 static INLINE void
 202 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 203                          const struct lp_rast_shader_inputs *inputs,
 204                          unsigned x, unsigned y )
 205 {
 206    struct lp_rasterizer *rast = task->rast;
 207    const struct lp_rast_state *state = task->current_state;
 208    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 209    void *depth;
 210    unsigned i;
 211
 212    /* color buffer */
 213    for (i = 0; i < rast->state.nr_cbufs; i++)
 214       color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
 215
 216    depth = lp_rast_get_depth_block_pointer(rast, x, y);
 217
 218    /* run shader on 4x4 block */
 219    state->jit_function[RAST_WHOLE]( &state->jit_context,
 220                                     x, y,
 221                                     inputs->facing,
 222                                     inputs->a0,
 223                                     inputs->dadx,
 224                                     inputs->dady,
 225                                     color,
 226                                     depth,
 227                                     INT_MIN, INT_MIN, INT_MIN,
 228                                     NULL, NULL, NULL, &task->vis_counter );
 229 }
 230
 231
 232 #endif