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#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_2D;
else
template->target = pt->target;
template->format = pt->format;
template->width0 = width;
template->height0 = height;
template->depth0 = depth;
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_new(struct pipe_context *pipe,
struct pipe_resource *pt,
struct pipe_subresource sr,
unsigned usage,
const struct pipe_box *box,
bool direct)
{
struct pipe_screen *pscreen = pipe->screen;
struct util_staging_transfer *tx;
struct pipe_resource staging_resource_template;
tx = CALLOC_STRUCT(util_staging_transfer);
if (!tx)
return NULL;
pipe_resource_reference(&tx->base.resource, pt);
tx->base.sr = sr;
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)
{
struct pipe_subresource dstsr;
unsigned zi;
dstsr.face = 0;
dstsr.level = 0;
for(zi = 0; zi < box->depth; ++zi)
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);
}
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) {
struct pipe_subresource srcsr;
unsigned zi;
srcsr.face = 0;
srcsr.level = 0;
for(zi = 0; zi < tx->base.box.depth; ++zi)
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);
}
pipe_resource_reference(&tx->staging_resource, NULL);
}
pipe_resource_reference(&ptx->resource, NULL);
FREE(ptx);
}
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