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ilo: support mapping with a staging system buffer

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It can be used for unpacking compressed texture on-the-fly or to support
explicit transfer flushing.
This commit is contained in:
Chia-I Wu 2013-05-09 14:21:25 +08:00
parent baa44db065
commit 183ea823fd
1 changed files with 77 additions and 0 deletions
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77
src/gallium/drivers/ilo/ilo_resource.c
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@ -25,6 +25,7 @@
* Chia-I Wu <olv@lunarg.com>
*/
#include "util/u_surface.h"
#include "util/u_transfer.h"
#include "ilo_cp.h"
@ -37,6 +38,7 @@
enum ilo_transfer_map_method {
ILO_TRANSFER_MAP_DIRECT,
ILO_TRANSFER_MAP_STAGING_SYS,
};
struct ilo_transfer {
@ -44,6 +46,8 @@ struct ilo_transfer {
enum ilo_transfer_map_method method;
void *ptr;
void *staging_sys;
};
static inline struct ilo_transfer *
@ -261,6 +265,73 @@ ilo_transfer_inline_write(struct pipe_context *pipe,
res->bo->pwrite(res->bo, offset, size, data);
}
static void
transfer_unmap_sys(struct ilo_context *ilo,
struct ilo_resource *res,
struct ilo_transfer *xfer)
{
const void *src = xfer->ptr;
struct pipe_transfer *dst_xfer;
void *dst;
dst = ilo->base.transfer_map(&ilo->base,
xfer->base.resource, xfer->base.level,
PIPE_TRANSFER_WRITE |
PIPE_TRANSFER_MAP_DIRECTLY |
PIPE_TRANSFER_DISCARD_RANGE,
&xfer->base.box, &dst_xfer);
if (!dst_xfer) {
ilo_err("failed to map resource for moving staging data\n");
FREE(xfer->staging_sys);
return;
}
util_copy_box(dst, res->bo_format,
dst_xfer->stride, dst_xfer->layer_stride, 0, 0, 0,
dst_xfer->box.width, dst_xfer->box.height, dst_xfer->box.depth,
src, xfer->base.stride, xfer->base.layer_stride, 0, 0, 0);
ilo->base.transfer_unmap(&ilo->base, dst_xfer);
FREE(xfer->staging_sys);
}
static bool
transfer_map_sys(struct ilo_context *ilo,
struct ilo_resource *res,
struct ilo_transfer *xfer)
{
const struct pipe_box *box = &xfer->base.box;
const size_t stride = util_format_get_stride(res->base.format, box->width);
const size_t size =
util_format_get_2d_size(res->base.format, stride, box->height);
bool read_back;
if (xfer->base.usage & PIPE_TRANSFER_READ) {
read_back = true;
}
else if (xfer->base.usage & PIPE_TRANSFER_WRITE) {
const unsigned discard_flags =
(PIPE_TRANSFER_DISCARD_RANGE | PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE);
if (!(xfer->base.usage & discard_flags))
read_back = true;
}
/* TODO */
if (read_back)
return false;
xfer->staging_sys = MALLOC(size * box->depth);
if (!xfer->staging_sys)
return false;
xfer->base.stride = stride;
xfer->base.layer_stride = size;
xfer->ptr = xfer->staging_sys;
return true;
}
static void
transfer_unmap_direct(struct ilo_context *ilo,
struct ilo_resource *res,
@ -415,6 +486,9 @@ ilo_transfer_unmap(struct pipe_context *pipe,
case ILO_TRANSFER_MAP_DIRECT:
transfer_unmap_direct(ilo, res, xfer);
break;
case ILO_TRANSFER_MAP_STAGING_SYS:
transfer_unmap_sys(ilo, res, xfer);
break;
default:
assert(!"unknown mapping method");
break;
@ -455,6 +529,9 @@ ilo_transfer_map(struct pipe_context *pipe,
case ILO_TRANSFER_MAP_DIRECT:
ok = transfer_map_direct(ilo, res, xfer);
break;
case ILO_TRANSFER_MAP_STAGING_SYS:
ok = transfer_map_sys(ilo, res, xfer);
break;
default:
assert(!"unknown mapping method");
ok = false;