src/gallium/auxiliary/util/u_staging.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Luca Barbieri
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 #include "util/u_staging.h"
  28 #include "pipe/p_context.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_inlines.h"
  31
  32 static void
  33 util_staging_resource_template(struct pipe_resource *pt, unsigned width, unsigned height, unsigned depth, struct pipe_resource *template)
  34 {
  35    memset(template, 0, sizeof(struct pipe_resource));
  36    if(pt->target != PIPE_BUFFER && depth <= 1)
  37       template->target = PIPE_TEXTURE_RECT;
  38    else
  39       template->target = pt->target;
  40    template->format = pt->format;
  41    template->width0 = width;
  42    template->height0 = height;
  43    template->depth0 = depth;
  44    template->last_level = 0;
  45    template->nr_samples = pt->nr_samples;
  46    template->bind = 0;
  47    template->usage = PIPE_USAGE_STAGING;
  48    template->flags = 0;
  49 }
  50
  51 struct util_staging_transfer *
  52 util_staging_transfer_init(struct pipe_context *pipe,
  53            struct pipe_resource *pt,
  54            struct pipe_subresource sr,
  55            unsigned usage,
  56            const struct pipe_box *box,
  57            bool direct, struct util_staging_transfer *tx)
  58 {
  59    struct pipe_screen *pscreen = pipe->screen;
  60
  61    struct pipe_resource staging_resource_template;
  62
  63    pipe_resource_reference(&tx->base.resource, pt);
  64    tx->base.sr = sr;
  65    tx->base.usage = usage;
  66    tx->base.box = *box;
  67
  68    if (direct)
  69    {
  70       tx->staging_resource = pt;
  71       return tx;
  72    }
  73
  74    util_staging_resource_template(pt, box->width, box->height, box->depth, &staging_resource_template);
  75    tx->staging_resource = pscreen->resource_create(pscreen, &staging_resource_template);
  76    if (!tx->staging_resource)
  77    {
  78       pipe_resource_reference(&tx->base.resource, NULL);
  79       FREE(tx);
  80       return NULL;
  81    }
  82
  83    if (usage & PIPE_TRANSFER_READ)
  84    {
  85       struct pipe_subresource dstsr;
  86       unsigned zi;
  87       dstsr.face = 0;
  88       dstsr.level = 0;
  89       for(zi = 0; zi < box->depth; ++zi)
  90          pipe->resource_copy_region(pipe, tx->staging_resource, dstsr, 0, 0, 0, tx->base.resource, sr, box->x, box->y, box->z + zi, box->width, box->height);
  91    }
  92
  93    return tx;
  94 }
  95
  96 void
  97 util_staging_transfer_destroy(struct pipe_context *pipe, struct pipe_transfer *ptx)
  98 {
  99    struct util_staging_transfer *tx = (struct util_staging_transfer *)ptx;
 100
 101    if (tx->staging_resource != tx->base.resource)
 102    {
 103       if(tx->base.usage & PIPE_TRANSFER_WRITE) {
 104          struct pipe_subresource srcsr;
 105          unsigned zi;
 106          srcsr.face = 0;
 107          srcsr.level = 0;
 108          for(zi = 0; zi < tx->base.box.depth; ++zi)
 109             pipe->resource_copy_region(pipe, tx->base.resource, tx->base.sr, tx->base.box.x, tx->base.box.y, tx->base.box.z + zi, tx->staging_resource, srcsr, 0, 0, 0, tx->base.box.width, tx->base.box.height);
 110       }
 111
 112       pipe_resource_reference(&tx->staging_resource, NULL);
 113    }
 114
 115    pipe_resource_reference(&ptx->resource, NULL);
 116    FREE(ptx);
 117 }