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;
  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         for (l = 0; l <= pt->last_level; l++) {
  27                 pt->width[l] = width;
  28                 pt->height[l] = height;
  29                 pt->depth[l] = depth;
  30
  31                 if (swizzled)
  32                         nv40mt->level[l].pitch = pt->width[l] * pt->cpp;
  33                 else
  34                         nv40mt->level[l].pitch = pt->width[0] * pt->cpp;
  35                 nv40mt->level[l].pitch = (nv40mt->level[l].pitch + 63) & ~63;
  36
  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_context *pipe, const struct pipe_texture *pt)
  58 {
  59         struct pipe_winsys *ws = pipe->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         nv40_miptree_layout(mt);
  67
  68         mt->buffer = ws->buffer_create(ws, 256, PIPE_BUFFER_USAGE_PIXEL,
  69                                        mt->total_size);
  70         if (!mt->buffer) {
  71                 free(mt);
  72                 return NULL;
  73         }
  74
  75         return &mt->base;
  76 }
  77
  78 static void
  79 nv40_miptree_release(struct pipe_context *pipe, struct pipe_texture **pt)
  80 {
  81         struct pipe_winsys *ws = pipe->winsys;
  82         struct pipe_texture *mt = *pt;
  83
  84         *pt = NULL;
  85         if (--mt->refcount <= 0) {
  86                 struct nv40_miptree *nv40mt = (struct nv40_miptree *)mt;
  87                 int l;
  88
  89                 pipe_buffer_reference(ws, &nv40mt->buffer, NULL);
  90                 for (l = 0; l <= mt->last_level; l++) {
  91                         if (nv40mt->level[l].image_offset)
  92                                 free(nv40mt->level[l].image_offset);
  93                 }
  94                 free(nv40mt);
  95         }
  96 }
  97
  98 void
  99 nv40_init_miptree_functions(struct nv40_context *nv40)
 100 {
 101         nv40->pipe.texture_create = nv40_miptree_create;
 102         nv40->pipe.texture_release = nv40_miptree_release;
 103 }
 104