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 #include "nv30_screen.h"
   8
   9 static void
  10 nv30_miptree_layout(struct nv30_miptree *nv30mt)
  11 {
  12         struct pipe_texture *pt = &nv30mt->base;
  13         boolean swizzled = FALSE;
  14         uint width = pt->width[0], height = pt->height[0], depth = pt->depth[0];
  15         uint offset = 0;
  16         int nr_faces, l, f;
  17
  18         if (pt->target == PIPE_TEXTURE_CUBE) {
  19                 nr_faces = 6;
  20         } else
  21         if (pt->target == PIPE_TEXTURE_3D) {
  22                 nr_faces = pt->depth[0];
  23         } else {
  24                 nr_faces = 1;
  25         }
  26
  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                         nv30mt->level[l].pitch = pt->width[l] * pt->cpp;
  34                 else
  35                         nv30mt->level[l].pitch = pt->width[0] * pt->cpp;
  36                 nv30mt->level[l].pitch = (nv30mt->level[l].pitch + 63) & ~63;
  37
  38                 nv30mt->level[l].image_offset =
  39                         CALLOC(nr_faces, sizeof(unsigned));
  40
  41                 width  = MAX2(1, width  >> 1);
  42                 height = MAX2(1, height >> 1);
  43                 depth  = MAX2(1, depth  >> 1);
  44
  45         }
  46
  47         for (f = 0; f < nr_faces; f++) {
  48                 for (l = 0; l <= pt->last_level; l++) {
  49                         nv30mt->level[l].image_offset[f] = offset;
  50                         offset += nv30mt->level[l].pitch * pt->height[l];
  51                 }
  52         }
  53
  54         nv30mt->total_size = offset;
  55 }
  56
  57 static struct pipe_texture *
  58 nv30_miptree_create(struct pipe_screen *screen, const struct pipe_texture *pt)
  59 {
  60         struct pipe_winsys *ws = screen->winsys;
  61         struct nv30_miptree *mt;
  62
  63         mt = MALLOC(sizeof(struct nv30_miptree));
  64         if (!mt)
  65                 return NULL;
  66         mt->base = *pt;
  67         mt->base.refcount = 1;
  68         mt->base.screen = screen;
  69
  70         nv30_miptree_layout(mt);
  71
  72         mt->buffer = ws->buffer_create(ws, 256, PIPE_BUFFER_USAGE_PIXEL,
  73                                            mt->total_size);
  74         if (!mt->buffer) {
  75                 free(mt);
  76                 return NULL;
  77         }
  78
  79         return &mt->base;
  80 }
  81
  82 static void
  83 nv30_miptree_release(struct pipe_screen *screen, struct pipe_texture **pt)
  84 {
  85         struct pipe_winsys *ws = screen->winsys;
  86         struct pipe_texture *mt = *pt;
  87
  88         *pt = NULL;
  89         if (--mt->refcount <= 0) {
  90                 struct nv30_miptree *nv30mt = (struct nv30_miptree *)mt;
  91                 int l;
  92
  93                 pipe_buffer_reference(ws, &nv30mt->buffer, NULL);
  94                 for (l = 0; l <= mt->last_level; l++) {
  95                         if (nv30mt->level[l].image_offset)
  96                                 free(nv30mt->level[l].image_offset);
  97                 }
  98                 free(nv30mt);
  99         }
 100 }
 101
 102 static void
 103 nv30_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt,
 104                     uint face, uint levels)
 105 {
 106 }
 107
 108 static struct pipe_surface *
 109 nv30_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
 110                          unsigned face, unsigned level, unsigned zslice)
 111 {
 112         struct pipe_winsys *ws = screen->winsys;
 113         struct nv30_miptree *nv30mt = (struct nv30_miptree *)pt;
 114         struct pipe_surface *ps;
 115
 116         ps = ws->surface_alloc(ws);
 117         if (!ps)
 118                 return NULL;
 119         pipe_buffer_reference(ws, &ps->buffer, nv30mt->buffer);
 120         ps->format = pt->format;
 121         ps->cpp = pt->cpp;
 122         ps->width = pt->width[level];
 123         ps->height = pt->height[level];
 124         ps->pitch = nv30mt->level[level].pitch / ps->cpp;
 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 void
 139 nv30_init_miptree_functions(struct nv30_context *nv30)
 140 {
 141         nv30->pipe.texture_update = nv30_miptree_update;
 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_get;
 150 }
 151