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].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 nv20_miptree_create(struct pipe_screen *screen, const struct pipe_texture *pt)
  80 {
  81         struct pipe_winsys *ws = screen->winsys;
  82         struct nv20_miptree *mt;
  83         unsigned buf_usage = PIPE_BUFFER_USAGE_PIXEL |
  84                              NOUVEAU_BUFFER_USAGE_TEXTURE;
  85
  86         mt = MALLOC(sizeof(struct nv20_miptree));
  87         if (!mt)
  88                 return NULL;
  89         mt->base = *pt;
  90         mt->base.refcount = 1;
  91         mt->base.screen = screen;
  92
  93         /* Swizzled textures must be POT */
  94         if (pt->width[0] & (pt->width[0] - 1) ||
  95             pt->height[0] & (pt->height[0] - 1))
  96                 mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
  97         else
  98         if (pt->tex_usage & (PIPE_TEXTURE_USAGE_PRIMARY |
  99                              PIPE_TEXTURE_USAGE_DISPLAY_TARGET))
 100                 mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
 101         else
 102         if (pt->tex_usage & PIPE_TEXTURE_USAGE_DYNAMIC)
 103                 mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
 104         else {
 105                 switch (pt->format) {
 106                 /* TODO: Figure out which formats can be swizzled */
 107                 case PIPE_FORMAT_A8R8G8B8_UNORM:
 108                 case PIPE_FORMAT_X8R8G8B8_UNORM:
 109                 case PIPE_FORMAT_R16_SNORM:
 110                         break;
 111                 default:
 112                         mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
 113                 }
 114         }
 115
 116         if (pt->tex_usage & PIPE_TEXTURE_USAGE_DYNAMIC)
 117                 buf_usage |= PIPE_BUFFER_USAGE_CPU_READ_WRITE;
 118
 119         nv20_miptree_layout(mt);
 120
 121         mt->buffer = ws->buffer_create(ws, 256, buf_usage, mt->total_size);
 122         if (!mt->buffer) {
 123                 FREE(mt);
 124                 return NULL;
 125         }
 126
 127         return &mt->base;
 128 }
 129
 130 static void
 131 nv20_miptree_release(struct pipe_screen *screen, struct pipe_texture **pt)
 132 {
 133         struct pipe_texture *mt = *pt;
 134
 135         *pt = NULL;
 136         if (--mt->refcount <= 0) {
 137                 struct nv20_miptree *nv20mt = (struct nv20_miptree *)mt;
 138                 int l;
 139
 140                 pipe_buffer_reference(screen, &nv20mt->buffer, NULL);
 141                 for (l = 0; l <= mt->last_level; l++) {
 142                         if (nv20mt->level[l].image_offset)
 143                                 FREE(nv20mt->level[l].image_offset);
 144                 }
 145                 FREE(nv20mt);
 146         }
 147 }
 148
 149 static struct pipe_surface *
 150 nv20_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
 151                          unsigned face, unsigned level, unsigned zslice,
 152                          unsigned flags)
 153 {
 154         struct nv20_miptree *nv20mt = (struct nv20_miptree *)pt;
 155         struct pipe_surface *ps;
 156
 157         ps = CALLOC_STRUCT(pipe_surface);
 158         if (!ps)
 159                 return NULL;
 160         pipe_texture_reference(&ps->texture, pt);
 161         ps->format = pt->format;
 162         ps->width = pt->width[level];
 163         ps->height = pt->height[level];
 164         ps->block = pt->block;
 165         ps->nblocksx = pt->nblocksx[level];
 166         ps->nblocksy = pt->nblocksy[level];
 167         ps->stride = nv20mt->level[level].pitch;
 168         ps->usage = flags;
 169         ps->status = PIPE_SURFACE_STATUS_DEFINED;
 170         ps->refcount = 1;
 171
 172         if (pt->target == PIPE_TEXTURE_CUBE) {
 173                 ps->offset = nv20mt->level[level].image_offset[face];
 174         } else
 175         if (pt->target == PIPE_TEXTURE_3D) {
 176                 ps->offset = nv20mt->level[level].image_offset[zslice];
 177         } else {
 178                 ps->offset = nv20mt->level[level].image_offset[0];
 179         }
 180
 181         return ps;
 182 }
 183
 184 static void
 185 nv20_miptree_surface_release(struct pipe_screen *pscreen,
 186                              struct pipe_surface **psurface)
 187 {
 188         struct pipe_surface *ps = *psurface;
 189
 190         *psurface = NULL;
 191         if (--ps->refcount > 0)
 192                 return;
 193
 194         pipe_texture_reference(&ps->texture, NULL);
 195         FREE(ps);
 196 }
 197
 198 void nv20_screen_init_miptree_functions(struct pipe_screen *pscreen)
 199 {
 200         pscreen->texture_create = nv20_miptree_create;
 201         pscreen->texture_blanket = nv20_miptree_blanket;
 202         pscreen->texture_release = nv20_miptree_release;
 203         pscreen->get_tex_surface = nv20_miptree_surface_get;
 204         pscreen->tex_surface_release = nv20_miptree_surface_release;
 205 }
 206