src/gallium/drivers/ilo/ilo_blit.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2012-2013 LunarG, Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #ifndef ILO_BLIT_H
  29 #define ILO_BLIT_H
  30
  31 #include "ilo_common.h"
  32 #include "ilo_context.h"
  33 #include "ilo_gpe.h"
  34 #include "ilo_resource.h"
  35
  36 struct ilo_context;
  37
  38 void
  39 ilo_blit_resolve_slices_for_hiz(struct ilo_context *ilo,
  40                                 struct pipe_resource *res, unsigned level,
  41                                 unsigned first_slice, unsigned num_slices,
  42                                 unsigned flags);
  43
  44 static inline void
  45 ilo_blit_resolve_slices(struct ilo_context *ilo,
  46                         struct pipe_resource *res, unsigned level,
  47                         unsigned first_slice, unsigned num_slices,
  48                         unsigned flags)
  49 {
  50    struct ilo_texture *tex;
  51    unsigned flag_mask;
  52
  53    if (res->target == PIPE_BUFFER)
  54       return;
  55
  56    tex = ilo_texture(res);
  57
  58    /*
  59     * This function is called frequently and we need to make it run faster.
  60     * As it is only used to resolve HiZ right now, return early when there is
  61     * no HiZ.
  62     */
  63    if (!ilo_texture_can_enable_hiz(tex, level, first_slice, num_slices))
  64       return;
  65
  66    /*
  67     * flags may be
  68     *
  69     *  - ILO_TEXTURE_CPU_{READ,WRITE} (transfer)
  70     *  - ILO_TEXTURE_BLT_{READ,WRITE} (BLT copy or clear)
  71     *  - ILO_TEXTURE_RENDER_{READ,WRITE} (sample or render)
  72     *  - ILO_TEXTURE_CLEAR
  73     *
  74     * It is assumed there is at most one writer, and that readers read before
  75     * writers write.
  76     */
  77    if (ilo_texture_can_enable_hiz(tex, level, first_slice, num_slices)) {
  78       ilo_blit_resolve_slices_for_hiz(ilo, res, level,
  79             first_slice, num_slices, flags);
  80    }
  81
  82    /* clear writers and clear state that are not set */
  83    flag_mask =
  84       ILO_TEXTURE_CPU_WRITE |
  85       ILO_TEXTURE_BLT_WRITE |
  86       ILO_TEXTURE_RENDER_WRITE;
  87    if (flags & flag_mask)
  88       flag_mask |= ILO_TEXTURE_CLEAR;
  89
  90    ilo_texture_set_slice_flags(tex, level,
  91          first_slice, num_slices, flag_mask, flags);
  92 }
  93
  94 static inline void
  95 ilo_blit_resolve_resource(struct ilo_context *ilo,
  96                           struct pipe_resource *res,
  97                           unsigned flags)
  98 {
  99    unsigned lv;
 100
 101    for (lv = 0; lv <= res->last_level; lv++) {
 102       const unsigned num_slices = (res->target == PIPE_TEXTURE_3D) ?
 103          u_minify(res->depth0, lv) : res->array_size;
 104
 105       ilo_blit_resolve_slices(ilo, res, lv, 0, num_slices, flags);
 106    }
 107 }
 108
 109 static inline void
 110 ilo_blit_resolve_surface(struct ilo_context *ilo,
 111                          struct pipe_surface *surf,
 112                          unsigned flags)
 113 {
 114    if (surf->texture->target == PIPE_BUFFER)
 115       return;
 116
 117    ilo_blit_resolve_slices(ilo, surf->texture,
 118          surf->u.tex.level, surf->u.tex.first_layer,
 119          surf->u.tex.last_layer - surf->u.tex.first_layer + 1,
 120          flags);
 121 }
 122
 123 static inline void
 124 ilo_blit_resolve_transfer(struct ilo_context *ilo,
 125                           const struct pipe_transfer *xfer)
 126 {
 127    unsigned flags = 0;
 128
 129    if (xfer->resource->target == PIPE_BUFFER)
 130       return;
 131
 132    if (xfer->usage & PIPE_TRANSFER_READ)
 133       flags |= ILO_TEXTURE_CPU_READ;
 134    if (xfer->usage & PIPE_TRANSFER_WRITE)
 135       flags |= ILO_TEXTURE_CPU_WRITE;
 136
 137    ilo_blit_resolve_slices(ilo, xfer->resource, xfer->level,
 138          xfer->box.z, xfer->box.depth, flags);
 139 }
 140
 141 static inline void
 142 ilo_blit_resolve_view(struct ilo_context *ilo,
 143                       const struct pipe_sampler_view *view)
 144 {
 145    const unsigned flags = ILO_TEXTURE_RENDER_READ;
 146    unsigned lv;
 147
 148    if (view->texture->target == PIPE_BUFFER)
 149       return;
 150
 151    for (lv = view->u.tex.first_level; lv <= view->u.tex.last_level; lv++) {
 152       unsigned first_slice, num_slices;
 153
 154       if (view->texture->target == PIPE_TEXTURE_3D) {
 155          first_slice = 0;
 156          num_slices = u_minify(view->texture->depth0, lv);
 157       }
 158       else {
 159          first_slice = view->u.tex.first_layer;
 160          num_slices = view->u.tex.last_layer - view->u.tex.first_layer + 1;
 161       }
 162
 163       ilo_blit_resolve_slices(ilo, view->texture,
 164             lv, first_slice, num_slices, flags);
 165    }
 166 }
 167
 168 static inline void
 169 ilo_blit_resolve_framebuffer(struct ilo_context *ilo)
 170 {
 171    const struct pipe_framebuffer_state *fb = &ilo->fb.state;
 172    unsigned sh, i;
 173
 174    /* Not all bound views are sampled by the shaders.  How do we tell? */
 175    for (sh = 0; sh < Elements(ilo->view); sh++) {
 176       for (i = 0; i < ilo->view[sh].count; i++) {
 177          if (ilo->view[sh].states[i])
 178             ilo_blit_resolve_view(ilo, ilo->view[sh].states[i]);
 179       }
 180    }
 181
 182    for (i = 0; i < fb->nr_cbufs; i++)
 183       ilo_blit_resolve_surface(ilo, fb->cbufs[i], ILO_TEXTURE_RENDER_WRITE);
 184
 185    if (fb->zsbuf)
 186       ilo_blit_resolve_surface(ilo, fb->zsbuf, ILO_TEXTURE_RENDER_WRITE);
 187 }
 188
 189 void
 190 ilo_init_blit_functions(struct ilo_context *ilo);
 191
 192 #endif /* ILO_BLIT_H */