src/gallium/drivers/nv40/nv40_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 "nv40_context.h"
   7
   8 static void
   9 nv40_miptree_layout(struct nv40_miptree *nv40mt)
  10 {
  11         struct pipe_texture *pt = &nv40mt->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
  32                 if (swizzled)
  33                         pitch = pt->width[l];
  34                 pitch = (pitch + 63) & ~63;
  35
  36                 nv40mt->level[l].pitch = pitch * pt->cpp;
  37                 nv40mt->level[l].image_offset =
  38                         CALLOC(nr_faces, sizeof(unsigned));
  39
  40                 width  = MAX2(1, width  >> 1);
  41                 height = MAX2(1, height >> 1);
  42                 depth  = MAX2(1, depth  >> 1);
  43
  44         }
  45
  46         for (f = 0; f < nr_faces; f++) {
  47                 for (l = 0; l <= pt->last_level; l++) {
  48                         nv40mt->level[l].image_offset[f] = offset;
  49                         offset += nv40mt->level[l].pitch * pt->height[l];
  50                 }
  51         }
  52
  53         nv40mt->total_size = offset;
  54 }
  55
  56 static struct pipe_texture *
  57 nv40_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
  58 {
  59         struct pipe_winsys *ws = pscreen->winsys;
  60         struct nv40_miptree *mt;
  61
  62         mt = MALLOC(sizeof(struct nv40_miptree));
  63         if (!mt)
  64                 return NULL;
  65         mt->base = *pt;
  66         mt->base.refcount = 1;
  67         mt->base.screen = pscreen;
  68
  69         nv40_miptree_layout(mt);
  70
  71         mt->buffer = ws->buffer_create(ws, 256, PIPE_BUFFER_USAGE_PIXEL,
  72                                        mt->total_size);
  73         if (!mt->buffer) {
  74                 FREE(mt);
  75                 return NULL;
  76         }
  77
  78         return &mt->base;
  79 }
  80
  81 static void
  82 nv40_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **pt)
  83 {
  84         struct pipe_winsys *ws = pscreen->winsys;
  85         struct pipe_texture *mt = *pt;
  86
  87         *pt = NULL;
  88         if (--mt->refcount <= 0) {
  89                 struct nv40_miptree *nv40mt = (struct nv40_miptree *)mt;
  90                 int l;
  91
  92                 pipe_buffer_reference(ws, &nv40mt->buffer, NULL);
  93                 for (l = 0; l <= mt->last_level; l++) {
  94                         if (nv40mt->level[l].image_offset)
  95                                 FREE(nv40mt->level[l].image_offset);
  96                 }
  97                 FREE(nv40mt);
  98         }
  99 }
 100
 101 static void
 102 nv40_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt,
 103                     uint face, uint levels)
 104 {
 105 }
 106
 107 static struct pipe_surface *
 108 nv40_miptree_surface(struct pipe_screen *pscreen, struct pipe_texture *pt,
 109                      unsigned face, unsigned level, unsigned zslice)
 110 {
 111         struct pipe_winsys *ws = pscreen->winsys;
 112         struct nv40_miptree *nv40mt = (struct nv40_miptree *)pt;
 113         struct pipe_surface *ps;
 114
 115         ps = ws->surface_alloc(ws);
 116         if (!ps)
 117                 return NULL;
 118         pipe_buffer_reference(ws, &ps->buffer, nv40mt->buffer);
 119         ps->format = pt->format;
 120         ps->cpp = pt->cpp;
 121         ps->width = pt->width[level];
 122         ps->height = pt->height[level];
 123         ps->pitch = nv40mt->level[level].pitch / ps->cpp;
 124
 125         if (pt->target == PIPE_TEXTURE_CUBE) {
 126                 ps->offset = nv40mt->level[level].image_offset[face];
 127         } else
 128         if (pt->target == PIPE_TEXTURE_3D) {
 129                 ps->offset = nv40mt->level[level].image_offset[zslice];
 130         } else {
 131                 ps->offset = nv40mt->level[level].image_offset[0];
 132         }
 133
 134         return ps;
 135 }
 136
 137 void
 138 nv40_init_miptree_functions(struct nv40_context *nv40)
 139 {
 140         nv40->pipe.texture_update = nv40_miptree_update;
 141 }
 142
 143 void
 144 nv40_screen_init_miptree_functions(struct pipe_screen *pscreen)
 145 {
 146         pscreen->texture_create = nv40_miptree_create;
 147         pscreen->texture_release = nv40_miptree_release;
 148         pscreen->get_tex_surface = nv40_miptree_surface;
 149 }
 150