src/gallium/drivers/ilo/ilo_blit.c

   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 #include "util/u_surface.h"
  29
  30 #include "ilo_blitter.h"
  31 #include "ilo_context.h"
  32 #include "ilo_blit.h"
  33
  34 static void
  35 ilo_resource_copy_region(struct pipe_context *pipe,
  36                          struct pipe_resource *dst,
  37                          unsigned dst_level,
  38                          unsigned dstx, unsigned dsty, unsigned dstz,
  39                          struct pipe_resource *src,
  40                          unsigned src_level,
  41                          const struct pipe_box *src_box)
  42 {
  43    struct ilo_context *ilo = ilo_context(pipe);
  44
  45    if (ilo_blitter_blt_copy_resource(ilo->blitter,
  46             dst, dst_level, dstx, dsty, dstz,
  47             src, src_level, src_box))
  48       return;
  49
  50    if (ilo_blitter_pipe_copy_resource(ilo->blitter,
  51             dst, dst_level, dstx, dsty, dstz,
  52             src, src_level, src_box))
  53       return;
  54
  55    util_resource_copy_region(&ilo->base, dst, dst_level,
  56          dstx, dsty, dstz, src, src_level, src_box);
  57 }
  58
  59 static void
  60 ilo_clear(struct pipe_context *pipe,
  61           unsigned buffers,
  62           const union pipe_color_union *color,
  63           double depth,
  64           unsigned stencil)
  65 {
  66    struct ilo_context *ilo = ilo_context(pipe);
  67
  68    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && ilo->fb.state.zsbuf) {
  69       if (ilo_blitter_rectlist_clear_zs(ilo->blitter, ilo->fb.state.zsbuf,
  70                buffers & PIPE_CLEAR_DEPTHSTENCIL, depth, stencil))
  71          buffers &= ~PIPE_CLEAR_DEPTHSTENCIL;
  72
  73       if (!buffers)
  74          return;
  75    }
  76
  77    ilo_blitter_pipe_clear_fb(ilo->blitter, buffers, color, depth, stencil);
  78 }
  79
  80 static void
  81 ilo_clear_render_target(struct pipe_context *pipe,
  82                         struct pipe_surface *dst,
  83                         const union pipe_color_union *color,
  84                         unsigned dstx, unsigned dsty,
  85                         unsigned width, unsigned height)
  86 {
  87    struct ilo_context *ilo = ilo_context(pipe);
  88
  89    if (!width || !height || dstx >= dst->width || dsty >= dst->height)
  90       return;
  91
  92    if (dstx + width > dst->width)
  93       width = dst->width - dstx;
  94    if (dsty + height > dst->height)
  95       height = dst->height - dsty;
  96
  97    if (ilo_blitter_blt_clear_rt(ilo->blitter,
  98             dst, color, dstx, dsty, width, height))
  99       return;
 100
 101    ilo_blitter_pipe_clear_rt(ilo->blitter,
 102          dst, color, dstx, dsty, width, height);
 103 }
 104
 105 static void
 106 ilo_clear_depth_stencil(struct pipe_context *pipe,
 107                         struct pipe_surface *dst,
 108                         unsigned clear_flags,
 109                         double depth,
 110                         unsigned stencil,
 111                         unsigned dstx, unsigned dsty,
 112                         unsigned width, unsigned height)
 113 {
 114    struct ilo_context *ilo = ilo_context(pipe);
 115
 116    if (!width || !height || dstx >= dst->width || dsty >= dst->height)
 117       return;
 118
 119    if (dstx + width > dst->width)
 120       width = dst->width - dstx;
 121    if (dsty + height > dst->height)
 122       height = dst->height - dsty;
 123
 124    if (ilo_blitter_blt_clear_zs(ilo->blitter,
 125             dst, clear_flags, depth, stencil, dstx, dsty, width, height))
 126       return;
 127
 128    ilo_blitter_pipe_clear_zs(ilo->blitter,
 129          dst, clear_flags, depth, stencil, dstx, dsty, width, height);
 130 }
 131
 132 static void
 133 ilo_blit(struct pipe_context *pipe, const struct pipe_blit_info *info)
 134 {
 135    struct ilo_context *ilo = ilo_context(pipe);
 136
 137    ilo_blitter_pipe_blit(ilo->blitter, info);
 138 }
 139
 140 static void
 141 ilo_flush_resource(struct pipe_context *pipe, struct pipe_resource *res)
 142 {
 143    struct ilo_context *ilo = ilo_context(pipe);
 144    const unsigned flags = ILO_TEXTURE_CPU_READ |
 145                           ILO_TEXTURE_BLT_READ |
 146                           ILO_TEXTURE_RENDER_READ;
 147
 148    ilo_blit_resolve_resource(ilo, res, flags);
 149 }
 150
 151 void
 152 ilo_blit_resolve_slices_for_hiz(struct ilo_context *ilo,
 153                                 struct pipe_resource *res, unsigned level,
 154                                 unsigned first_slice, unsigned num_slices,
 155                                 unsigned resolve_flags)
 156 {
 157    struct ilo_texture *tex = ilo_texture(res);
 158    const unsigned any_reader =
 159       ILO_TEXTURE_RENDER_READ |
 160       ILO_TEXTURE_BLT_READ |
 161       ILO_TEXTURE_CPU_READ;
 162    const unsigned other_writers =
 163       ILO_TEXTURE_BLT_WRITE |
 164       ILO_TEXTURE_CPU_WRITE;
 165    unsigned i;
 166
 167    assert(tex->base.target != PIPE_BUFFER &&
 168           ilo_texture_can_enable_hiz(tex, level, first_slice, num_slices));
 169
 170    if (resolve_flags & ILO_TEXTURE_RENDER_WRITE) {
 171       /*
 172        * When ILO_TEXTURE_RENDER_WRITE is set, there can be no reader.  We
 173        * need to perform a HiZ Buffer Resolve in case the resource was
 174        * previously written by another writer, unless this is a clear.
 175        *
 176        * When slices have different clear values, we perform a Depth Buffer
 177        * Resolve on all slices not sharing the clear value of the first slice.
 178        * After resolving, those slices do not use 3DSTATE_CLEAR_PARAMS and can
 179        * be made to have the same clear value as the first slice does.  This
 180        * way,
 181        *
 182        *  - 3DSTATE_CLEAR_PARAMS can be set to the clear value of any slice
 183        *  - we will not resolve unnecessarily next time this function is
 184        *    called
 185        *
 186        * Since slice clear value is the value the slice is cleared to when
 187        * ILO_TEXTURE_CLEAR is set, the bit needs to be unset.
 188        */
 189       assert(!(resolve_flags & (other_writers | any_reader)));
 190
 191       if (!(resolve_flags & ILO_TEXTURE_CLEAR)) {
 192          bool set_clear_value = false;
 193          uint32_t first_clear_value;
 194
 195          for (i = 0; i < num_slices; i++) {
 196             const struct ilo_texture_slice *slice =
 197                ilo_texture_get_slice(tex, level, first_slice + i);
 198
 199             if (slice->flags & other_writers) {
 200                ilo_blitter_rectlist_resolve_hiz(ilo->blitter,
 201                      res, level, first_slice + i);
 202             }
 203             else if (i == 0) {
 204                first_clear_value = slice->clear_value;
 205             }
 206             else if (slice->clear_value != first_clear_value &&
 207                      (slice->flags & ILO_TEXTURE_RENDER_WRITE)) {
 208                ilo_blitter_rectlist_resolve_z(ilo->blitter,
 209                      res, level, first_slice + i);
 210                set_clear_value = true;
 211             }
 212          }
 213
 214          if (set_clear_value) {
 215             /* ILO_TEXTURE_CLEAR will be cleared later */
 216             ilo_texture_set_slice_clear_value(tex, level,
 217                   first_slice, num_slices, first_clear_value);
 218          }
 219       }
 220    }
 221    else if ((resolve_flags & any_reader) ||
 222             ((resolve_flags & other_writers) &&
 223              !(resolve_flags & ILO_TEXTURE_CLEAR))) {
 224       /*
 225        * When there is at least a reader or writer, we need to perform a
 226        * Depth Buffer Resolve in case the resource was previously written
 227        * by ILO_TEXTURE_RENDER_WRITE.
 228        */
 229       for (i = 0; i < num_slices; i++) {
 230          const struct ilo_texture_slice *slice =
 231             ilo_texture_get_slice(tex, level, first_slice + i);
 232
 233          if (slice->flags & ILO_TEXTURE_RENDER_WRITE) {
 234             ilo_blitter_rectlist_resolve_z(ilo->blitter,
 235                   &tex->base, level, first_slice + i);
 236          }
 237       }
 238    }
 239 }
 240
 241 /**
 242  * Initialize blit-related functions.
 243  */
 244 void
 245 ilo_init_blit_functions(struct ilo_context *ilo)
 246 {
 247    ilo->base.resource_copy_region = ilo_resource_copy_region;
 248    ilo->base.blit = ilo_blit;
 249    ilo->base.flush_resource = ilo_flush_resource;
 250
 251    ilo->base.clear = ilo_clear;
 252    ilo->base.clear_render_target = ilo_clear_render_target;
 253    ilo->base.clear_depth_stencil = ilo_clear_depth_stencil;
 254 }