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