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/**************************************************************************
*
* Copyright 2010 Luca Barbieri
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "util/u_staging.h"
#include "pipe/p_context.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"
static void
util_staging_resource_template(struct pipe_resource *pt, unsigned width, unsigned height, unsigned depth, struct pipe_resource *template)
{
memset(template, 0, sizeof(struct pipe_resource));
if(pt->target != PIPE_BUFFER && depth <= 1)
template->target = PIPE_TEXTURE_RECT;
else
template->target = pt->target;
template->format = pt->format;
template->width0 = width;
template->height0 = height;
template->depth0 = depth;
template->array_size = 1;
template->last_level = 0;
template->nr_samples = pt->nr_samples;
template->bind = 0;
template->usage = PIPE_USAGE_STAGING;
template->flags = 0;
}
struct util_staging_transfer *
util_staging_transfer_init(struct pipe_context *pipe,
struct pipe_resource *pt,
unsigned level,
unsigned usage,
const struct pipe_box *box,
boolean direct, struct util_staging_transfer *tx)
{
struct pipe_screen *pscreen = pipe->screen;
struct pipe_resource staging_resource_template;
pipe_resource_reference(&tx->base.resource, pt);
tx->base.level = level;
tx->base.usage = usage;
tx->base.box = *box;
if (direct)
{
tx->staging_resource = pt;
return tx;
}
util_staging_resource_template(pt, box->width, box->height, box->depth, &staging_resource_template);
tx->staging_resource = pscreen->resource_create(pscreen, &staging_resource_template);
if (!tx->staging_resource)
{
pipe_resource_reference(&tx->base.resource, NULL);
FREE(tx);
return NULL;
}
if (usage & PIPE_TRANSFER_READ)
{
/* XXX this looks wrong dst is always the same but looping over src z? */
int zi;
struct pipe_box sbox;
sbox.x = box->x;
sbox.y = box->y;
sbox.z = box->z;
sbox.width = box->width;
sbox.height = box->height;
sbox.depth = 1;
for(zi = 0; zi < box->depth; ++zi) {
sbox.z = sbox.z + zi;
pipe->resource_copy_region(pipe, tx->staging_resource, 0, 0, 0, 0,
tx->base.resource, level, &sbox);
}
}
return tx;
}
void
util_staging_transfer_destroy(struct pipe_context *pipe, struct pipe_transfer *ptx)
{
struct util_staging_transfer *tx = (struct util_staging_transfer *)ptx;
if (tx->staging_resource != tx->base.resource)
{
if(tx->base.usage & PIPE_TRANSFER_WRITE) {
/* XXX this looks wrong src is always the same but looping over dst z? */
int zi;
struct pipe_box sbox;
sbox.x = 0;
sbox.y = 0;
sbox.z = 0;
sbox.width = tx->base.box.width;
sbox.height = tx->base.box.height;
sbox.depth = 1;
for(zi = 0; zi < tx->base.box.depth; ++zi)
pipe->resource_copy_region(pipe, tx->base.resource, tx->base.level, tx->base.box.x, tx->base.box.y, tx->base.box.z + zi,
tx->staging_resource, 0, &sbox);
}
pipe_resource_reference(&tx->staging_resource, NULL);
}
pipe_resource_reference(&ptx->resource, NULL);
FREE(ptx);
}
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