src/gallium/drivers/nv50/nv50_miptree.c

   1 /*
   2  * Copyright 2008 Ben Skeggs
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include "pipe/p_state.h"
  24 #include "pipe/p_defines.h"
  25 #include "pipe/p_inlines.h"
  26
  27 #include "nv50_context.h"
  28
  29 static struct pipe_texture *
  30 nv50_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
  31 {
  32         struct pipe_winsys *ws = pscreen->winsys;
  33         struct nv50_miptree *mt = CALLOC_STRUCT(nv50_miptree);
  34         unsigned usage, pitch;
  35
  36         mt->base = *pt;
  37         mt->base.refcount = 1;
  38         mt->base.screen = pscreen;
  39
  40         usage = PIPE_BUFFER_USAGE_PIXEL;
  41         switch (pt->format) {
  42         case PIPE_FORMAT_Z24S8_UNORM:
  43         case PIPE_FORMAT_Z16_UNORM:
  44                 usage |= NOUVEAU_BUFFER_USAGE_ZETA;
  45                 break;
  46         default:
  47                 break;
  48         }
  49
  50         pitch = ((pt->width[0] + 63) & ~63) * pt->block.size;
  51
  52         mt->buffer = ws->buffer_create(ws, 256, usage, pitch * pt->height[0]);
  53         if (!mt->buffer) {
  54                 FREE(mt);
  55                 return NULL;
  56         }
  57
  58         return &mt->base;
  59 }
  60
  61 static void
  62 nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
  63 {
  64         struct pipe_texture *pt = *ppt;
  65
  66         *ppt = NULL;
  67
  68         if (--pt->refcount <= 0) {
  69                 struct nv50_miptree *mt = nv50_miptree(pt);
  70
  71                 pipe_buffer_reference(pscreen, &mt->buffer, NULL);
  72                 FREE(mt);
  73         }
  74 }
  75
  76 static struct pipe_surface *
  77 nv50_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
  78                          unsigned face, unsigned level, unsigned zslice,
  79                          unsigned flags)
  80 {
  81         struct nv50_miptree *mt = nv50_miptree(pt);
  82         struct nv50_surface *s;
  83         struct pipe_surface *ps;
  84
  85         s = CALLOC_STRUCT(nv50_surface);
  86         if (!s)
  87                 return NULL;
  88         ps = &s->base;
  89
  90         ps->refcount = 1;
  91         ps->winsys = pscreen->winsys;
  92         ps->format = pt->format;
  93         ps->width = pt->width[level];
  94         ps->height = pt->height[level];
  95         ps->block = pt->block;
  96         ps->nblocksx = pt->nblocksx[level];
  97         ps->nblocksy = pt->nblocksy[level];
  98         ps->stride = ps->width * ps->block.size;
  99         ps->offset = 0;
 100         ps->usage = flags;
 101         ps->status = PIPE_SURFACE_STATUS_DEFINED;
 102
 103         pipe_texture_reference(&ps->texture, pt);
 104         pipe_buffer_reference(pscreen, &ps->buffer, mt->buffer);
 105
 106         return ps;
 107 }
 108
 109 static void
 110 nv50_miptree_surface_del(struct pipe_screen *pscreen,
 111                          struct pipe_surface **psurface)
 112 {
 113         struct pipe_surface *ps = *psurface;
 114         struct nv50_surface *s = nv50_surface(ps);
 115
 116         *psurface = NULL;
 117
 118         if (--ps->refcount <= 0) {
 119                 pipe_texture_reference(&ps->texture, NULL);
 120                 pipe_buffer_reference(pscreen, &ps->buffer, NULL);
 121                 FREE(s);
 122         }
 123 }
 124
 125 void
 126 nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
 127 {
 128         pscreen->texture_create = nv50_miptree_create;
 129         pscreen->texture_release = nv50_miptree_release;
 130         pscreen->get_tex_surface = nv50_miptree_surface_new;
 131         pscreen->tex_surface_release = nv50_miptree_surface_del;
 132 }
 133