src/gallium/drivers/nv10/nv10_miptree.c

   1 #include "pipe/p_state.h"
   2 #include "pipe/p_defines.h"
   3 #include "pipe/p_inlines.h"
   4
   5 #include "nv10_context.h"
   6 #include "nv10_screen.h"
   7
   8 static void
   9 nv10_miptree_layout(struct nv10_miptree *nv10mt)
  10 {
  11         struct pipe_texture *pt = &nv10mt->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                         nv10mt->level[l].pitch = pt->nblocksx[l] * pt->block.size;
  31                 else
  32                         nv10mt->level[l].pitch = pt->nblocksx[0] * pt->block.size;
  33                 nv10mt->level[l].pitch = (nv10mt->level[l].pitch + 63) & ~63;
  34
  35                 nv10mt->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                         nv10mt->level[l].image_offset[f] = offset;
  46                         offset += nv10mt->level[l].pitch * pt->height[l];
  47                 }
  48         }
  49
  50         nv10mt->total_size = offset;
  51 }
  52
  53 static struct pipe_texture *
  54 nv10_miptree_blanket(struct pipe_screen *pscreen, const struct pipe_texture *pt,
  55                      const unsigned *stride, struct pipe_buffer *pb)
  56 {
  57         struct nv10_miptree *mt;
  58
  59         /* Only supports 2D, non-mipmapped textures for the moment */
  60         if (pt->target != PIPE_TEXTURE_2D || pt->last_level != 0 ||
  61             pt->depth[0] != 1)
  62                 return NULL;
  63
  64         mt = CALLOC_STRUCT(nv10_miptree);
  65         if (!mt)
  66                 return NULL;
  67
  68         mt->base = *pt;
  69         mt->base.refcount = 1;
  70         mt->base.screen = pscreen;
  71         mt->level[0].pitch = stride[0];
  72         mt->level[0].image_offset = CALLOC(1, sizeof(unsigned));
  73
  74         pipe_buffer_reference(pscreen, &mt->buffer, pb);
  75         return &mt->base;
  76 }
  77
  78 static struct pipe_texture *
  79 nv10_miptree_create(struct pipe_screen *screen, const struct pipe_texture *pt)
  80 {
  81         struct pipe_winsys *ws = screen->winsys;
  82         struct nv10_miptree *mt;
  83
  84         mt = MALLOC(sizeof(struct nv10_miptree));
  85         if (!mt)
  86                 return NULL;
  87         mt->base = *pt;
  88         mt->base.refcount = 1;
  89         mt->base.screen = screen;
  90
  91         nv10_miptree_layout(mt);
  92
  93         mt->buffer = ws->buffer_create(ws, 256, PIPE_BUFFER_USAGE_PIXEL,
  94                                            mt->total_size);
  95         if (!mt->buffer) {
  96                 FREE(mt);
  97                 return NULL;
  98         }
  99
 100         return &mt->base;
 101 }
 102
 103 static void
 104 nv10_miptree_release(struct pipe_screen *screen, struct pipe_texture **pt)
 105 {
 106         struct pipe_texture *mt = *pt;
 107
 108         *pt = NULL;
 109         if (--mt->refcount <= 0) {
 110                 struct nv10_miptree *nv10mt = (struct nv10_miptree *)mt;
 111                 int l;
 112
 113                 pipe_buffer_reference(screen, &nv10mt->buffer, NULL);
 114                 for (l = 0; l <= mt->last_level; l++) {
 115                         if (nv10mt->level[l].image_offset)
 116                                 FREE(nv10mt->level[l].image_offset);
 117                 }
 118                 FREE(nv10mt);
 119         }
 120 }
 121
 122 static void
 123 nv10_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt,
 124                     uint face, uint levels)
 125 {
 126 }
 127
 128
 129 static struct pipe_surface *
 130 nv10_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
 131                          unsigned face, unsigned level, unsigned zslice,
 132                          unsigned flags)
 133 {
 134         struct pipe_winsys *ws = screen->winsys;
 135         struct nv10_miptree *nv10mt = (struct nv10_miptree *)pt;
 136         struct pipe_surface *ps;
 137
 138         ps = CALLOC_STRUCT(pipe_surface);
 139         if (!ps)
 140                 return NULL;
 141         pipe_texture_reference(&ps->texture, pt);
 142         ps->format = pt->format;
 143         ps->width = pt->width[level];
 144         ps->height = pt->height[level];
 145         ps->block = pt->block;
 146         ps->nblocksx = pt->nblocksx[level];
 147         ps->nblocksy = pt->nblocksy[level];
 148         ps->stride = nv10mt->level[level].pitch;
 149         ps->refcount = 1;
 150
 151         if (pt->target == PIPE_TEXTURE_CUBE) {
 152                 ps->offset = nv10mt->level[level].image_offset[face];
 153         } else {
 154                 ps->offset = nv10mt->level[level].image_offset[0];
 155         }
 156
 157         return ps;
 158 }
 159
 160 static void
 161 nv10_miptree_surface_release(struct pipe_screen *screen,
 162                              struct pipe_surface **surface)
 163 {
 164 }
 165
 166 void nv10_screen_init_miptree_functions(struct pipe_screen *pscreen)
 167 {
 168         pscreen->texture_create = nv10_miptree_create;
 169         pscreen->texture_blanket = nv10_miptree_blanket;
 170         pscreen->texture_release = nv10_miptree_release;
 171         pscreen->get_tex_surface = nv10_miptree_surface_get;
 172         pscreen->tex_surface_release = nv10_miptree_surface_release;
 173 }
 174