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         /*XXX*/
  52         pitch *= 2;
  53
  54         mt->buffer = ws->buffer_create(ws, 256, usage, pitch * pt->height[0]);
  55         if (!mt->buffer) {
  56                 FREE(mt);
  57                 return NULL;
  58         }
  59
  60         return &mt->base;
  61 }
  62
  63 static void
  64 nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
  65 {
  66         struct pipe_texture *pt = *ppt;
  67
  68         *ppt = NULL;
  69
  70         if (--pt->refcount <= 0) {
  71                 struct nv50_miptree *mt = nv50_miptree(pt);
  72
  73                 pipe_buffer_reference(pscreen, &mt->buffer, NULL);
  74                 FREE(mt);
  75         }
  76 }
  77
  78 static struct pipe_surface *
  79 nv50_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
  80                          unsigned face, unsigned level, unsigned zslice,
  81                          unsigned flags)
  82 {
  83         struct nv50_miptree *mt = nv50_miptree(pt);
  84         struct nv50_surface *s;
  85         struct pipe_surface *ps;
  86
  87         s = CALLOC_STRUCT(nv50_surface);
  88         if (!s)
  89                 return NULL;
  90         ps = &s->base;
  91
  92         ps->refcount = 1;
  93         ps->winsys = pscreen->winsys;
  94         ps->format = pt->format;
  95         ps->width = pt->width[level];
  96         ps->height = pt->height[level];
  97         ps->block = pt->block;
  98         ps->nblocksx = pt->nblocksx[level];
  99         ps->nblocksy = pt->nblocksy[level];
 100         ps->stride = ps->width * ps->block.size;
 101         ps->offset = 0;
 102         ps->usage = flags;
 103         ps->status = PIPE_SURFACE_STATUS_DEFINED;
 104
 105         pipe_texture_reference(&ps->texture, pt);
 106         pipe_buffer_reference(pscreen, &ps->buffer, mt->buffer);
 107
 108         return ps;
 109 }
 110
 111 static void
 112 nv50_miptree_surface_del(struct pipe_screen *pscreen,
 113                          struct pipe_surface **psurface)
 114 {
 115         struct pipe_surface *ps = *psurface;
 116         struct nv50_surface *s = nv50_surface(ps);
 117
 118         *psurface = NULL;
 119
 120         if (--ps->refcount <= 0) {
 121                 pipe_texture_reference(&ps->texture, NULL);
 122                 pipe_buffer_reference(pscreen, &ps->buffer, NULL);
 123                 FREE(s);
 124         }
 125 }
 126
 127 void
 128 nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
 129 {
 130         pscreen->texture_create = nv50_miptree_create;
 131         pscreen->texture_release = nv50_miptree_release;
 132         pscreen->get_tex_surface = nv50_miptree_surface_new;
 133         pscreen->tex_surface_release = nv50_miptree_surface_del;
 134 }
 135