src/gallium/drivers/nv20/nv20_miptree.c

   1 #include "pipe/p_state.h"
   2 #include "pipe/p_defines.h"
   3 #include "pipe/p_inlines.h"
   4
   5 #include "nv20_context.h"
   6 #include "nv20_screen.h"
   7
   8 static void
   9 nv20_miptree_layout(struct nv20_miptree *nv20mt)
  10 {
  11         struct pipe_texture *pt = &nv20mt->base;
  12         boolean swizzled = FALSE;
  13         uint width = pt->width[0], height = pt->height[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                 nr_faces = 1;
  21         }
  22
  23         for (l = 0; l <= pt->last_level; l++) {
  24                 pt->width[l] = width;
  25                 pt->height[l] = height;
  26                 pt->nblocksx[l] = pf_get_nblocksx(&pt->block, width);
  27                 pt->nblocksy[l] = pf_get_nblocksy(&pt->block, height);
  28
  29                 if (swizzled)
  30                         nv20mt->level[l].pitch = pt->nblocksx[l] * pt->block.size;
  31                 else
  32                         nv20mt->level[l].pitch = pt->nblocksx[0] * pt->block.size;
  33                 nv20mt->level[l].pitch = (nv20mt->level[l].pitch + 63) & ~63;
  34
  35                 nv20mt->level[l].image_offset =
  36                         CALLOC(nr_faces, sizeof(unsigned));
  37
  38                 width  = MAX2(1, width  >> 1);
  39                 height = MAX2(1, height >> 1);
  40
  41         }
  42
  43         for (f = 0; f < nr_faces; f++) {
  44                 for (l = 0; l <= pt->last_level; l++) {
  45                         nv20mt->level[l].image_offset[f] = offset;
  46                         offset += nv20mt->level[l].pitch * pt->height[l];
  47                 }
  48         }
  49
  50         nv20mt->total_size = offset;
  51 }
  52
  53 static struct pipe_texture *
  54 nv20_miptree_create(struct pipe_screen *screen, const struct pipe_texture *pt)
  55 {
  56         struct pipe_winsys *ws = screen->winsys;
  57         struct nv20_miptree *mt;
  58
  59         mt = MALLOC(sizeof(struct nv20_miptree));
  60         if (!mt)
  61                 return NULL;
  62         mt->base = *pt;
  63         mt->base.refcount = 1;
  64         mt->base.screen = screen;
  65
  66         nv20_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 nv20_miptree_release(struct pipe_screen *screen, struct pipe_texture **pt)
  80 {
  81         struct pipe_texture *mt = *pt;
  82
  83         *pt = NULL;
  84         if (--mt->refcount <= 0) {
  85                 struct nv20_miptree *nv20mt = (struct nv20_miptree *)mt;
  86                 int l;
  87
  88                 pipe_buffer_reference(screen, &nv20mt->buffer, NULL);
  89                 for (l = 0; l <= mt->last_level; l++) {
  90                         if (nv20mt->level[l].image_offset)
  91                                 FREE(nv20mt->level[l].image_offset);
  92                 }
  93                 FREE(nv20mt);
  94         }
  95 }
  96
  97 static struct pipe_surface *
  98 nv20_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
  99                          unsigned face, unsigned level, unsigned zslice,
 100                          unsigned flags)
 101 {
 102         struct nv20_miptree *nv20mt = (struct nv20_miptree *)pt;
 103         struct pipe_surface *ps;
 104
 105         ps = CALLOC_STRUCT(pipe_surface);
 106         if (!ps)
 107                 return NULL;
 108         pipe_texture_reference(&ps->texture, pt);
 109         pipe_buffer_reference(screen, &ps->buffer, nv20mt->buffer);
 110         ps->format = pt->format;
 111         ps->width = pt->width[level];
 112         ps->height = pt->height[level];
 113         ps->block = pt->block;
 114         ps->nblocksx = pt->nblocksx[level];
 115         ps->nblocksy = pt->nblocksy[level];
 116         ps->stride = nv20mt->level[level].pitch;
 117         ps->usage = flags;
 118         ps->status = PIPE_SURFACE_STATUS_DEFINED;
 119         ps->refcount = 1;
 120
 121         if (pt->target == PIPE_TEXTURE_CUBE) {
 122                 ps->offset = nv20mt->level[level].image_offset[face];
 123         } else
 124         if (pt->target == PIPE_TEXTURE_3D) {
 125                 ps->offset = nv20mt->level[level].image_offset[zslice];
 126         } else {
 127                 ps->offset = nv20mt->level[level].image_offset[0];
 128         }
 129
 130         return ps;
 131 }
 132
 133 static void
 134 nv20_miptree_surface_release(struct pipe_screen *pscreen,
 135                              struct pipe_surface **psurface)
 136 {
 137         struct pipe_surface *ps = *psurface;
 138
 139         *psurface = NULL;
 140         if (--ps->refcount > 0)
 141                 return;
 142
 143         pipe_texture_reference(&ps->texture, NULL);
 144         pipe_buffer_reference(pscreen, &ps->buffer, NULL);
 145         FREE(ps);
 146 }
 147
 148 void nv20_screen_init_miptree_functions(struct pipe_screen *pscreen)
 149 {
 150         pscreen->texture_create = nv20_miptree_create;
 151         pscreen->texture_release = nv20_miptree_release;
 152         pscreen->get_tex_surface = nv20_miptree_surface_get;
 153         pscreen->tex_surface_release = nv20_miptree_surface_release;
 154 }
 155