diff options
| -rw-r--r-- | src/gallium/auxiliary/Makefile | 1 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_staging.c | 93 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_staging.h | 29 |
3 files changed, 123 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/Makefile b/src/gallium/auxiliary/Makefile index 843b72bc38b..9544e90a965 100644 --- a/src/gallium/auxiliary/Makefile +++ b/src/gallium/auxiliary/Makefile @@ -131,6 +131,7 @@ C_SOURCES = \ util/u_sampler.c \ util/u_simple_shaders.c \ util/u_snprintf.c \ + util/u_staging.c \ util/u_surface.c \ util/u_surfaces.c \ util/u_texture.c \ diff --git a/src/gallium/auxiliary/util/u_staging.c b/src/gallium/auxiliary/util/u_staging.c new file mode 100644 index 00000000000..4853aaf6d96 --- /dev/null +++ b/src/gallium/auxiliary/util/u_staging.c @@ -0,0 +1,93 @@ +#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; +} + +inline 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; + dstsr.face = 0; + dstsr.level = 0; + for(unsigned 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; + srcsr.face = 0; + srcsr.level = 0; + for(unsigned 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); +} diff --git a/src/gallium/auxiliary/util/u_staging.h b/src/gallium/auxiliary/util/u_staging.h new file mode 100644 index 00000000000..f5976dadb15 --- /dev/null +++ b/src/gallium/auxiliary/util/u_staging.h @@ -0,0 +1,29 @@ +/* Implement transfers using staging resources like in DirectX 10/11 */ + +#ifndef U_STAGING_H +#define U_STAGING_H + +#include "pipe/p_state.h" + +struct util_staging_transfer { + struct pipe_transfer base; + + /* if direct, same as base.resource, otherwise the temporary staging resource */ + struct pipe_resource *staging_resource; +}; + +/* user must be stride, slice_stride and offset */ +/* pt->usage == PIPE_USAGE_DYNAMIC should be a good value to pass for direct */ +/* staging resource is currently created with PIPE_USAGE_DYNAMIC */ +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); + +void +util_staging_transfer_destroy(struct pipe_context *pipe, struct pipe_transfer *ptx); + +#endif |