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 #include "util/u_math.h"
   5
   6 #include "nv10_context.h"
   7 #include "nv10_screen.h"
   8
   9 static void
  10 nv10_miptree_layout(struct nv10_miptree *nv10mt)
  11 {
  12         struct pipe_texture *pt = &nv10mt->base;
  13         boolean swizzled = FALSE;
  14         uint width = pt->width0, height = pt->height0;
  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                 nr_faces = 1;
  22         }
  23
  24         for (l = 0; l <= pt->last_level; l++) {
  25
  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  = u_minify(width, 1);
  39                 height = u_minify(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 * u_minify(pt->height0, 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->depth0 != 1)
  62                 return NULL;
  63
  64         mt = CALLOC_STRUCT(nv10_miptree);
  65         if (!mt)
  66                 return NULL;
  67
  68         mt->base = *pt;
  69         pipe_reference_init(&mt->base.reference, 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(&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 nv10_miptree *mt;
  82
  83         mt = MALLOC(sizeof(struct nv10_miptree));
  84         if (!mt)
  85                 return NULL;
  86         mt->base = *pt;
  87         pipe_reference_init(&mt->base.reference, 1);
  88         mt->base.screen = screen;
  89
  90         nv10_miptree_layout(mt);
  91
  92         mt->buffer = screen->buffer_create(screen, 256, PIPE_BUFFER_USAGE_PIXEL,
  93                                            mt->total_size);
  94         if (!mt->buffer) {
  95                 FREE(mt);
  96                 return NULL;
  97         }
  98
  99         return &mt->base;
 100 }
 101
 102 static void
 103 nv10_miptree_destroy(struct pipe_texture *pt)
 104 {
 105         struct nv10_miptree *nv10mt = (struct nv10_miptree *)pt;
 106         int l;
 107
 108         pipe_buffer_reference(&nv10mt->buffer, NULL);
 109         for (l = 0; l <= pt->last_level; l++) {
 110                 if (nv10mt->level[l].image_offset)
 111                         FREE(nv10mt->level[l].image_offset);
 112         }
 113         FREE(nv10mt);
 114 }
 115
 116 static void
 117 nv10_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt,
 118                     uint face, uint levels)
 119 {
 120 }
 121
 122
 123 static struct pipe_surface *
 124 nv10_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
 125                          unsigned face, unsigned level, unsigned zslice,
 126                          unsigned flags)
 127 {
 128         struct nv10_miptree *nv10mt = (struct nv10_miptree *)pt;
 129         struct nv04_surface *ns;
 130
 131         ns = CALLOC_STRUCT(nv04_surface);
 132         if (!ns)
 133                 return NULL;
 134         pipe_texture_reference(&ns->base.texture, pt);
 135         ns->base.format = pt->format;
 136         ns->base.width = u_minify(pt->width0, level);
 137         ns->base.height = u_minify(pt->height0, level);
 138         ns->base.usage = flags;
 139         pipe_reference_init(&ns->base.reference, 1);
 140         ns->base.face = face;
 141         ns->base.level = level;
 142         ns->base.zslice = zslice;
 143         ns->pitch = nv10mt->level[level].pitch;
 144
 145         if (pt->target == PIPE_TEXTURE_CUBE) {
 146                 ns->base.offset = nv10mt->level[level].image_offset[face];
 147         } else {
 148                 ns->base.offset = nv10mt->level[level].image_offset[0];
 149         }
 150
 151         return &ns->base;
 152 }
 153
 154 static void
 155 nv10_miptree_surface_destroy(struct pipe_surface *surface)
 156 {
 157 }
 158
 159 void nv10_screen_init_miptree_functions(struct pipe_screen *pscreen)
 160 {
 161         pscreen->texture_create = nv10_miptree_create;
 162         pscreen->texture_blanket = nv10_miptree_blanket;
 163         pscreen->texture_destroy = nv10_miptree_destroy;
 164         pscreen->get_tex_surface = nv10_miptree_surface_get;
 165         pscreen->tex_surface_destroy = nv10_miptree_surface_destroy;
 166 }
 167