src/gallium/drivers/nv30/nv30_miptree.c

   1 #include "pipe/p_state.h"
   2 #include "pipe/p_defines.h"
   3 #include "pipe/p_util.h"
   4 #include "pipe/p_inlines.h"
   5
   6 #include "nv30_context.h"
   7
   8 static void
   9 nv30_miptree_layout(struct nv30_miptree *nv30mt)
  10 {
  11         struct pipe_texture *pt = &nv30mt->base;
  12         boolean swizzled = FALSE;
  13         uint width = pt->width[0], height = pt->height[0], depth = pt->depth[0];
  14         uint offset = 0;
  15         int nr_faces, l, f, pitch;
  16
  17         if (pt->target == PIPE_TEXTURE_CUBE) {
  18                 nr_faces = 6;
  19         } else
  20         if (pt->target == PIPE_TEXTURE_3D) {
  21                 nr_faces = pt->depth[0];
  22         } else {
  23                 nr_faces = 1;
  24         }
  25
  26         pitch = pt->width[0];
  27         for (l = 0; l <= pt->last_level; l++) {
  28                 pt->width[l] = width;
  29                 pt->height[l] = height;
  30                 pt->depth[l] = depth;
  31                 pt->nblocksx[l] = pf_get_nblocksx(&pt->block, width);
  32                 pt->nblocksy[l] = pf_get_nblocksy(&pt->block, height);
  33
  34                 if (swizzled)
  35                         pitch = pt->width[l];
  36                 pitch = (pitch + 63) & ~63;
  37
  38                 nv30mt->level[l].pitch = pitch * pt->block.size;
  39                 nv30mt->level[l].image_offset =
  40                         CALLOC(nr_faces, sizeof(unsigned));
  41
  42                 width  = MAX2(1, width  >> 1);
  43                 height = MAX2(1, height >> 1);
  44                 depth  = MAX2(1, depth  >> 1);
  45
  46         }
  47
  48         for (f = 0; f < nr_faces; f++) {
  49                 for (l = 0; l <= pt->last_level; l++) {
  50                         nv30mt->level[l].image_offset[f] = offset;
  51                         offset += nv30mt->level[l].pitch * pt->height[l];
  52                 }
  53         }
  54
  55         nv30mt->total_size = offset;
  56 }
  57
  58 static struct pipe_texture *
  59 nv30_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
  60 {
  61         struct pipe_winsys *ws = pscreen->winsys;
  62         struct nv30_miptree *mt;
  63
  64         mt = MALLOC(sizeof(struct nv30_miptree));
  65         if (!mt)
  66                 return NULL;
  67         mt->base = *pt;
  68         mt->base.refcount = 1;
  69         mt->base.screen = pscreen;
  70
  71         nv30_miptree_layout(mt);
  72
  73         mt->buffer = ws->buffer_create(ws, 256,
  74                                        PIPE_BUFFER_USAGE_PIXEL |
  75                                        NOUVEAU_BUFFER_USAGE_TEXTURE,
  76                                        mt->total_size);
  77         if (!mt->buffer) {
  78                 FREE(mt);
  79                 return NULL;
  80         }
  81
  82         return &mt->base;
  83 }
  84
  85 static void
  86 nv30_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **pt)
  87 {
  88         struct pipe_winsys *ws = pscreen->winsys;
  89         struct pipe_texture *mt = *pt;
  90
  91         *pt = NULL;
  92         if (--mt->refcount <= 0) {
  93                 struct nv30_miptree *nv30mt = (struct nv30_miptree *)mt;
  94                 int l;
  95
  96                 pipe_buffer_reference(ws, &nv30mt->buffer, NULL);
  97                 for (l = 0; l <= mt->last_level; l++) {
  98                         if (nv30mt->level[l].image_offset)
  99                                 FREE(nv30mt->level[l].image_offset);
 100                 }
 101                 FREE(nv30mt);
 102         }
 103 }
 104
 105 static struct pipe_surface *
 106 nv30_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
 107                          unsigned face, unsigned level, unsigned zslice,
 108                          unsigned flags)
 109 {
 110         struct pipe_winsys *ws = pscreen->winsys;
 111         struct nv30_miptree *nv30mt = (struct nv30_miptree *)pt;
 112         struct pipe_surface *ps;
 113
 114         ps = ws->surface_alloc(ws);
 115         if (!ps)
 116                 return NULL;
 117         pipe_buffer_reference(ws, &ps->buffer, nv30mt->buffer);
 118         ps->format = pt->format;
 119         ps->width = pt->width[level];
 120         ps->height = pt->height[level];
 121         ps->nblocksx = pt->nblocksx[level];
 122         ps->nblocksy = pt->nblocksy[level];
 123         ps->block = pt->block;
 124         ps->stride = nv30mt->level[level].pitch;
 125
 126         if (pt->target == PIPE_TEXTURE_CUBE) {
 127                 ps->offset = nv30mt->level[level].image_offset[face];
 128         } else
 129         if (pt->target == PIPE_TEXTURE_3D) {
 130                 ps->offset = nv30mt->level[level].image_offset[zslice];
 131         } else {
 132                 ps->offset = nv30mt->level[level].image_offset[0];
 133         }
 134
 135         return ps;
 136 }
 137
 138 static void
 139 nv30_miptree_surface_del(struct pipe_screen *pscreen,
 140                          struct pipe_surface **psurface)
 141 {
 142 }
 143
 144 void
 145 nv30_screen_init_miptree_functions(struct pipe_screen *pscreen)
 146 {
 147         pscreen->texture_create = nv30_miptree_create;
 148         pscreen->texture_release = nv30_miptree_release;
 149         pscreen->get_tex_surface = nv30_miptree_surface_new;
 150         pscreen->tex_surface_release = nv30_miptree_surface_del;
 151 }
 152