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_memory.h"
  35 #include "lp_rast.h"
  36 #include "lp_scene.h"
  37 #include "lp_state.h"
  38 #include "lp_texture.h"
  39 #include "lp_tile_soa.h"
  40 #include "lp_limits.h"
  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    /** "back" pointer */
  57    struct lp_rasterizer *rast;
  58
  59    /** "my" index */
  60    unsigned thread_index;
  61
  62    /* occlude counter for visiable pixels */
  63    uint32_t vis_counter;
  64
  65    pipe_semaphore work_ready;
  66    pipe_semaphore work_done;
  67 };
  68
  69
  70 /**
  71  * This is the state required while rasterizing tiles.
  72  * Note that this contains per-thread information too.
  73  * The tile size is TILE_SIZE x TILE_SIZE pixels.
  74  */
  75 struct lp_rasterizer
  76 {
  77    boolean exit_flag;
  78
  79    /* Framebuffer stuff
  80     */
  81    struct {
  82       uint8_t *map;
  83       unsigned stride;
  84       unsigned blocksize;
  85    } zsbuf;
  86
  87    struct {
  88       unsigned nr_cbufs;
  89       unsigned clear_color;
  90       unsigned clear_depth;
  91       char clear_stencil;
  92    } state;
  93
  94    /** The incoming queue of scenes ready to rasterize */
  95    struct lp_scene_queue *full_scenes;
  96
  97    /**
  98     * The outgoing queue of processed scenes to return to setup module
  99     *
 100     * XXX: while scenes are per-context but the rasterizer is
 101     * (potentially) shared, these empty scenes should be returned to
 102     * the context which created them rather than retained here.
 103     */
 104    /*   struct lp_scene_queue *empty_scenes; */
 105
 106    /** The scene currently being rasterized by the threads */
 107    struct lp_scene *curr_scene;
 108
 109    /** A task object for each rasterization thread */
 110    struct lp_rasterizer_task tasks[LP_MAX_THREADS];
 111
 112    unsigned num_threads;
 113    pipe_thread threads[LP_MAX_THREADS];
 114
 115    /** For synchronizing the rasterization threads */
 116    pipe_barrier barrier;
 117 };
 118
 119
 120 void
 121 lp_rast_shade_quads_mask(struct lp_rasterizer_task *task,
 122                          const struct lp_rast_shader_inputs *inputs,
 123                          unsigned x, unsigned y,
 124                          unsigned mask);
 125
 126
 127
 128 /**
 129  * Get the pointer to a 4x4 depth/stencil block.
 130  * We'll map the z/stencil buffer on demand here.
 131  * Note that this may be called even when there's no z/stencil buffer - return
 132  * NULL in that case.
 133  * \param x, y location of 4x4 block in window coords
 134  */
 135 static INLINE void *
 136 lp_rast_get_depth_block_pointer(struct lp_rasterizer_task *task,
 137                                 unsigned x, unsigned y)
 138 {
 139    const struct lp_rasterizer *rast = task->rast;
 140    void *depth;
 141
 142    assert((x % TILE_VECTOR_WIDTH) == 0);
 143    assert((y % TILE_VECTOR_HEIGHT) == 0);
 144
 145    if (!rast->zsbuf.map) {
 146       /* Either out of memory or no zsbuf.  Can't tell without access
 147        * to the state.  Just use dummy tile memory, but don't print
 148        * the oom warning as this most likely because there is no
 149        * zsbuf.
 150        */
 151       return lp_dummy_tile;
 152    }
 153
 154    depth = (rast->zsbuf.map +
 155             rast->zsbuf.stride * y +
 156             rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
 157
 158    assert(lp_check_alignment(depth, 16));
 159    return depth;
 160 }
 161
 162
 163 /**
 164  * Get pointer to the swizzled color tile
 165  */
 166 static INLINE uint8_t *
 167 lp_rast_get_color_tile_pointer(struct lp_rasterizer_task *task,
 168                                unsigned buf, enum lp_texture_usage usage)
 169 {
 170    struct lp_rasterizer *rast = task->rast;
 171
 172    assert(task->x % TILE_SIZE == 0);
 173    assert(task->y % TILE_SIZE == 0);
 174    assert(buf < rast->state.nr_cbufs);
 175
 176    if (!task->color_tiles[buf]) {
 177       struct pipe_surface *cbuf = rast->curr_scene->fb.cbufs[buf];
 178       struct llvmpipe_resource *lpt;
 179       assert(cbuf);
 180       lpt = llvmpipe_resource(cbuf->texture);
 181       task->color_tiles[buf] = lp_swizzled_cbuf[task->thread_index][buf];
 182
 183       if (usage != LP_TEX_USAGE_WRITE_ALL) {
 184          llvmpipe_swizzle_cbuf_tile(lpt,
 185                                     cbuf->face + cbuf->zslice,
 186                                     cbuf->level,
 187                                     task->x, task->y,
 188                                     task->color_tiles[buf]);
 189       }
 190    }
 191
 192    return task->color_tiles[buf];
 193 }
 194
 195
 196 /**
 197  * Get the pointer to a 4x4 color block (within a 64x64 tile).
 198  * We'll map the color buffer on demand here.
 199  * Note that this may be called even when there's no color buffers - return
 200  * NULL in that case.
 201  * \param x, y location of 4x4 block in window coords
 202  */
 203 static INLINE uint8_t *
 204 lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
 205                                 unsigned buf, unsigned x, unsigned y)
 206 {
 207    unsigned px, py, pixel_offset;
 208    uint8_t *color;
 209
 210    assert((x % TILE_VECTOR_WIDTH) == 0);
 211    assert((y % TILE_VECTOR_HEIGHT) == 0);
 212
 213    color = lp_rast_get_color_tile_pointer(task, buf, LP_TEX_USAGE_READ_WRITE);
 214    assert(color);
 215
 216    px = x % TILE_SIZE;
 217    py = y % TILE_SIZE;
 218    pixel_offset = tile_pixel_offset(px, py, 0);
 219
 220    color = color + pixel_offset;
 221
 222    assert(lp_check_alignment(color, 16));
 223    return color;
 224 }
 225
 226
 227
 228 /**
 229  * Shade all pixels in a 4x4 block.  The fragment code omits the
 230  * triangle in/out tests.
 231  * \param x, y location of 4x4 block in window coords
 232  */
 233 static INLINE void
 234 lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
 235                          const struct lp_rast_shader_inputs *inputs,
 236                          unsigned x, unsigned y )
 237 {
 238    const struct lp_rasterizer *rast = task->rast;
 239    const struct lp_rast_state *state = inputs->state;
 240    struct lp_fragment_shader_variant *variant = state->variant;
 241    uint8_t *color[PIPE_MAX_COLOR_BUFS];
 242    void *depth;
 243    unsigned i;
 244
 245    /* color buffer */
 246    for (i = 0; i < rast->state.nr_cbufs; i++)
 247       color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
 248
 249    depth = lp_rast_get_depth_block_pointer(task, x, y);
 250
 251    /* run shader on 4x4 block */
 252    variant->jit_function[RAST_WHOLE]( &state->jit_context,
 253                                       x, y,
 254                                       inputs->facing,
 255                                       inputs->a0,
 256                                       inputs->dadx,
 257                                       inputs->dady,
 258                                       color,
 259                                       depth,
 260                                       0xffff,
 261                                       &task->vis_counter );
 262 }
 263
 264
 265 #endif