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_blanket(struct pipe_screen *pscreen, const struct pipe_texture *pt,
  55                      const unsigned *stride, struct pipe_buffer *pb)
  56 {
  57         struct nv20_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(nv20_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].image_offset = CALLOC(1, sizeof(unsigned));
  72
  73         pipe_buffer_reference(pscreen, &mt->buffer, pb);
  74         return &mt->base;
  75 }
  76
  77 static struct pipe_texture *
  78 nv20_miptree_create(struct pipe_screen *screen, const struct pipe_texture *pt)
  79 {
  80         struct pipe_winsys *ws = screen->winsys;
  81         struct nv20_miptree *mt;
  82         unsigned buf_usage = PIPE_BUFFER_USAGE_PIXEL |
  83                              NOUVEAU_BUFFER_USAGE_TEXTURE;
  84
  85         mt = MALLOC(sizeof(struct nv20_miptree));
  86         if (!mt)
  87                 return NULL;
  88         mt->base = *pt;
  89         mt->base.refcount = 1;
  90         mt->base.screen = screen;
  91
  92         /* Swizzled textures must be POT */
  93         if (pt->width[0] & (pt->width[0] - 1) ||
  94             pt->height[0] & (pt->height[0] - 1))
  95                 mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
  96         else
  97         if (pt->tex_usage & (PIPE_TEXTURE_USAGE_PRIMARY |
  98                              PIPE_TEXTURE_USAGE_DISPLAY_TARGET))
  99                 mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
 100         else
 101         if (pt->tex_usage & PIPE_TEXTURE_USAGE_DYNAMIC)
 102                 mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
 103         else {
 104                 switch (pt->format) {
 105                 /* TODO: Figure out which formats can be swizzled */
 106                 case PIPE_FORMAT_A8R8G8B8_UNORM:
 107                 case PIPE_FORMAT_X8R8G8B8_UNORM:
 108                 case PIPE_FORMAT_R16_SNORM:
 109                         break;
 110                 default:
 111                         mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
 112                 }
 113         }
 114
 115         if (pt->tex_usage & PIPE_TEXTURE_USAGE_DYNAMIC)
 116                 buf_usage |= PIPE_BUFFER_USAGE_CPU_READ_WRITE;
 117
 118         nv20_miptree_layout(mt);
 119
 120         mt->buffer = ws->buffer_create(ws, 256, buf_usage, mt->total_size);
 121         if (!mt->buffer) {
 122                 FREE(mt);
 123                 return NULL;
 124         }
 125
 126         return &mt->base;
 127 }
 128
 129 static void
 130 nv20_miptree_release(struct pipe_screen *screen, struct pipe_texture **pt)
 131 {
 132         struct pipe_texture *mt = *pt;
 133
 134         *pt = NULL;
 135         if (--mt->refcount <= 0) {
 136                 struct nv20_miptree *nv20mt = (struct nv20_miptree *)mt;
 137                 int l;
 138
 139                 pipe_buffer_reference(screen, &nv20mt->buffer, NULL);
 140                 for (l = 0; l <= mt->last_level; l++) {
 141                         if (nv20mt->level[l].image_offset)
 142                                 FREE(nv20mt->level[l].image_offset);
 143                 }
 144                 FREE(nv20mt);
 145         }
 146 }
 147
 148 static struct pipe_surface *
 149 nv20_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
 150                          unsigned face, unsigned level, unsigned zslice,
 151                          unsigned flags)
 152 {
 153         struct nv20_miptree *nv20mt = (struct nv20_miptree *)pt;
 154         struct pipe_surface *ps;
 155
 156         ps = CALLOC_STRUCT(pipe_surface);
 157         if (!ps)
 158                 return NULL;
 159         pipe_texture_reference(&ps->texture, pt);
 160         ps->format = pt->format;
 161         ps->width = pt->width[level];
 162         ps->height = pt->height[level];
 163         ps->block = pt->block;
 164         ps->nblocksx = pt->nblocksx[level];
 165         ps->nblocksy = pt->nblocksy[level];
 166         ps->stride = nv20mt->level[level].pitch;
 167         ps->usage = flags;
 168         ps->status = PIPE_SURFACE_STATUS_DEFINED;
 169         ps->refcount = 1;
 170
 171         if (pt->target == PIPE_TEXTURE_CUBE) {
 172                 ps->offset = nv20mt->level[level].image_offset[face];
 173         } else
 174         if (pt->target == PIPE_TEXTURE_3D) {
 175                 ps->offset = nv20mt->level[level].image_offset[zslice];
 176         } else {
 177                 ps->offset = nv20mt->level[level].image_offset[0];
 178         }
 179
 180         return ps;
 181 }
 182
 183 static void
 184 nv20_miptree_surface_release(struct pipe_screen *pscreen,
 185                              struct pipe_surface **psurface)
 186 {
 187         struct pipe_surface *ps = *psurface;
 188
 189         *psurface = NULL;
 190         if (--ps->refcount > 0)
 191                 return;
 192
 193         pipe_texture_reference(&ps->texture, NULL);
 194         FREE(ps);
 195 }
 196
 197 void nv20_screen_init_miptree_functions(struct pipe_screen *pscreen)
 198 {
 199         pscreen->texture_create = nv20_miptree_create;
 200         pscreen->texture_blanket = nv20_miptree_blanket;
 201         pscreen->texture_release = nv20_miptree_release;
 202         pscreen->get_tex_surface = nv20_miptree_surface_get;
 203         pscreen->tex_surface_release = nv20_miptree_surface_release;
 204 }
 205