src/gallium/drivers/nv20/nv20_transfer.c

   1 #include <pipe/p_state.h>
   2 #include <pipe/p_defines.h>
   3 #include <pipe/p_inlines.h>
   4 #include <util/u_memory.h>
   5 #include <util/u_math.h>
   6 #include <nouveau/nouveau_winsys.h>
   7 #include "nv20_context.h"
   8 #include "nv20_screen.h"
   9 #include "nv20_state.h"
  10
  11 struct nv20_transfer {
  12         struct pipe_transfer base;
  13         struct pipe_surface *surface;
  14         bool direct;
  15 };
  16
  17 static void
  18 nv20_compatible_transfer_tex(struct pipe_texture *pt, unsigned level,
  19                              struct pipe_texture *template)
  20 {
  21         memset(template, 0, sizeof(struct pipe_texture));
  22         template->target = pt->target;
  23         template->format = pt->format;
  24         template->width0 = u_minify(pt->width0, level);
  25         template->height0 = u_minify(pt->height0, level);
  26         template->depth0 = 1;
  27         template->block = pt->block;
  28         template->nblocksx[0] = pt->nblocksx[level];
  29         template->nblocksy[0] = pt->nblocksx[level];
  30         template->last_level = 0;
  31         template->nr_samples = pt->nr_samples;
  32
  33         template->tex_usage = PIPE_TEXTURE_USAGE_DYNAMIC |
  34                               NOUVEAU_TEXTURE_USAGE_LINEAR;
  35 }
  36
  37 static struct pipe_transfer *
  38 nv20_transfer_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
  39                   unsigned face, unsigned level, unsigned zslice,
  40                   enum pipe_transfer_usage usage,
  41                   unsigned x, unsigned y, unsigned w, unsigned h)
  42 {
  43         struct nv20_miptree *mt = (struct nv20_miptree *)pt;
  44         struct nv20_transfer *tx;
  45         struct pipe_texture tx_tex_template, *tx_tex;
  46
  47         tx = CALLOC_STRUCT(nv20_transfer);
  48         if (!tx)
  49                 return NULL;
  50
  51         pipe_texture_reference(&tx->base.texture, pt);
  52         tx->base.format = pt->format;
  53         tx->base.x = x;
  54         tx->base.y = y;
  55         tx->base.width = w;
  56         tx->base.height = h;
  57         tx->base.block = pt->block;
  58         tx->base.nblocksx = pt->nblocksx[level];
  59         tx->base.nblocksy = pt->nblocksy[level];
  60         tx->base.stride = mt->level[level].pitch;
  61         tx->base.usage = usage;
  62         tx->base.face = face;
  63         tx->base.level = level;
  64         tx->base.zslice = zslice;
  65
  66         /* Direct access to texture */
  67         if ((pt->tex_usage & PIPE_TEXTURE_USAGE_DYNAMIC ||
  68              debug_get_bool_option("NOUVEAU_NO_TRANSFER", TRUE/*XXX:FALSE*/)) &&
  69             pt->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR)
  70         {
  71                 tx->direct = true;
  72                 tx->surface = pscreen->get_tex_surface(pscreen, pt,
  73                                                        0, 0, 0,
  74                                                        pipe_transfer_buffer_flags(&tx->base));
  75                 return &tx->base;
  76         }
  77
  78         tx->direct = false;
  79
  80         nv20_compatible_transfer_tex(pt, level, &tx_tex_template);
  81
  82         tx_tex = pscreen->texture_create(pscreen, &tx_tex_template);
  83         if (!tx_tex)
  84         {
  85                 FREE(tx);
  86                 return NULL;
  87         }
  88
  89         tx->surface = pscreen->get_tex_surface(pscreen, tx_tex,
  90                                                face, level, zslice,
  91                                                pipe_transfer_buffer_flags(&tx->base));
  92
  93         pipe_texture_reference(&tx_tex, NULL);
  94
  95         if (!tx->surface)
  96         {
  97                 pipe_surface_reference(&tx->surface, NULL);
  98                 FREE(tx);
  99                 return NULL;
 100         }
 101
 102         if (usage & PIPE_TRANSFER_READ) {
 103                 struct nv20_screen *nvscreen = nv20_screen(pscreen);
 104                 struct pipe_surface *src;
 105
 106                 src = pscreen->get_tex_surface(pscreen, pt,
 107                                                face, level, zslice,
 108                                                PIPE_BUFFER_USAGE_GPU_READ);
 109
 110                 /* TODO: Check if SIFM can deal with x,y,w,h when swizzling */
 111                 /* TODO: Check if SIFM can un-swizzle */
 112                 nvscreen->eng2d->copy(nvscreen->eng2d,
 113                                       tx->surface, 0, 0,
 114                                       src, 0, 0,
 115                                       src->width, src->height);
 116
 117                 pipe_surface_reference(&src, NULL);
 118         }
 119
 120         return &tx->base;
 121 }
 122
 123 static void
 124 nv20_transfer_del(struct pipe_transfer *ptx)
 125 {
 126         struct nv20_transfer *tx = (struct nv20_transfer *)ptx;
 127
 128         if (!tx->direct && (ptx->usage = PIPE_TRANSFER_WRITE)) {
 129                 struct pipe_screen *pscreen = ptx->texture->screen;
 130                 struct nv20_screen *nvscreen = nv20_screen(pscreen);
 131                 struct pipe_surface *dst;
 132
 133                 dst = pscreen->get_tex_surface(pscreen, ptx->texture,
 134                                                ptx->face, ptx->level, ptx->zslice,
 135                                                PIPE_BUFFER_USAGE_GPU_WRITE);
 136
 137                 /* TODO: Check if SIFM can deal with x,y,w,h when swizzling */
 138                 nvscreen->eng2d->copy(nvscreen->eng2d,
 139                                       dst, 0, 0,
 140                                       tx->surface, 0, 0,
 141                                       dst->width, dst->height);
 142
 143                 pipe_surface_reference(&dst, NULL);
 144         }
 145
 146         pipe_surface_reference(&tx->surface, NULL);
 147         pipe_texture_reference(&ptx->texture, NULL);
 148         FREE(ptx);
 149 }
 150
 151 static void *
 152 nv20_transfer_map(struct pipe_screen *pscreen, struct pipe_transfer *ptx)
 153 {
 154         struct nv20_transfer *tx = (struct nv20_transfer *)ptx;
 155         struct nv04_surface *ns = (struct nv04_surface *)tx->surface;
 156         struct nv20_miptree *mt = (struct nv20_miptree *)tx->surface->texture;
 157         void *map = pipe_buffer_map(pscreen, mt->buffer,
 158                                     pipe_transfer_buffer_flags(ptx));
 159
 160         return map + ns->base.offset +
 161                ptx->y * ns->pitch + ptx->x * ptx->block.size;
 162 }
 163
 164 static void
 165 nv20_transfer_unmap(struct pipe_screen *pscreen, struct pipe_transfer *ptx)
 166 {
 167         struct nv20_transfer *tx = (struct nv20_transfer *)ptx;
 168         struct nv20_miptree *mt = (struct nv20_miptree *)tx->surface->texture;
 169
 170         pipe_buffer_unmap(pscreen, mt->buffer);
 171 }
 172
 173 void
 174 nv20_screen_init_transfer_functions(struct pipe_screen *pscreen)
 175 {
 176         pscreen->get_tex_transfer = nv20_transfer_new;
 177         pscreen->tex_transfer_destroy = nv20_transfer_del;
 178         pscreen->transfer_map = nv20_transfer_map;
 179         pscreen->transfer_unmap = nv20_transfer_unmap;
 180 }