[Mesa-dev] [PATCH 1/2] gallium/util: add u_transfer_helper
Eric Anholt
eric at anholt.net
Tue Dec 12 18:07:25 UTC 2017
Rob Clark <robdclark at gmail.com> writes:
> Add a new helper that drivers can use to emulate various things that
> need special handling in particular in transfer_map:
>
> 1) z32_s8x24.. gl/gallium treats this as a single buffer with depth
> and stencil interleaved but hardware frequently treats this as
> separate z32 and s8 buffers. Special pack/unpack handling is
> needed in transfer_map/unmap to pack/unpack the exposed buffer
>
> 2) fake RGTC.. GPUs designed with GLES in mind, but which can other-
> wise do GL3, if native RGTC is not supported it can be emulated
> by converting to uncompressed internally, but needs pack/unpack
> in transfer_map/unmap
>
> 3) MSAA resolves in the transfer_map() case
>
> v2: add MSAA resolve based on Eric's "gallium: Add helpers for MSAA
> resolves in pipe_transfer_map()/unmap()." patch; avoid wrapping
> pipe_resource, to make it possible for drivers to use both this
> and threaded_context.
Update on changes between versions?
>
> Signed-off-by: Rob Clark <robdclark at gmail.com>
> ---
> src/gallium/auxiliary/Makefile.sources | 2 +
> src/gallium/auxiliary/meson.build | 2 +
> src/gallium/auxiliary/util/u_transfer_helper.c | 499 +++++++++++++++++++++++++
> src/gallium/auxiliary/util/u_transfer_helper.h | 135 +++++++
> src/gallium/include/pipe/p_screen.h | 8 +-
> 5 files changed, 645 insertions(+), 1 deletion(-)
> create mode 100644 src/gallium/auxiliary/util/u_transfer_helper.c
> create mode 100644 src/gallium/auxiliary/util/u_transfer_helper.h
>
> diff --git a/src/gallium/auxiliary/Makefile.sources b/src/gallium/auxiliary/Makefile.sources
> index f40c4723fae..a2dae04698c 100644
> --- a/src/gallium/auxiliary/Makefile.sources
> +++ b/src/gallium/auxiliary/Makefile.sources
> @@ -304,6 +304,8 @@ C_SOURCES := \
> util/u_tile.h \
> util/u_transfer.c \
> util/u_transfer.h \
> + util/u_transfer_helper.c \
> + util/u_transfer_helper.h \
> util/u_threaded_context.c \
> util/u_threaded_context.h \
> util/u_threaded_context_calls.h \
> diff --git a/src/gallium/auxiliary/meson.build b/src/gallium/auxiliary/meson.build
> index 3e623fd099f..8c242ec1a05 100644
> --- a/src/gallium/auxiliary/meson.build
> +++ b/src/gallium/auxiliary/meson.build
> @@ -324,6 +324,8 @@ files_libgallium = files(
> 'util/u_tile.h',
> 'util/u_transfer.c',
> 'util/u_transfer.h',
> + 'util/u_transfer_helper.c',
> + 'util/u_transfer_helper.h',
> 'util/u_threaded_context.c',
> 'util/u_threaded_context.h',
> 'util/u_threaded_context_calls.h',
> diff --git a/src/gallium/auxiliary/util/u_transfer_helper.c b/src/gallium/auxiliary/util/u_transfer_helper.c
> new file mode 100644
> index 00000000000..c987a35b36c
> --- /dev/null
> +++ b/src/gallium/auxiliary/util/u_transfer_helper.c
> @@ -0,0 +1,499 @@
> +/*
> + * Copyright © 2017 Red Hat
> + *
> + * 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 AUTHORS OR COPYRIGHT HOLDERS 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 "pipe/p_screen.h"
> +
> +#include "util/u_box.h"
> +#include "util/u_format.h"
> +#include "util/u_format_rgtc.h"
> +#include "util/u_format_zs.h"
> +#include "util/u_inlines.h"
> +#include "util/u_transfer_helper.h"
> +
> +
> +struct u_transfer_helper {
> + const struct u_transfer_vtbl *vtbl;
> + bool separate_z32s8;
> + bool fake_rgtc;
> + bool msaa_map;
> +};
> +
> +static inline bool handle_transfer(struct pipe_resource *prsc)
> +{
> + struct u_transfer_helper *helper = prsc->screen->transfer_helper;
> +
> + if (helper->vtbl->get_internal_format) {
> + enum pipe_format internal_format =
> + helper->vtbl->get_internal_format(prsc);
> + if (internal_format != prsc->format)
> + return true;
> + }
> +
> + if (helper->msaa_map && (prsc->nr_samples > 1))
> + return true;
> +
> + return false;
> +}
> +
> +/* The pipe_transfer ptr could either be the driver's, or u_transfer,
> + * depending on whether we are intervening or not. Check handle_transfer()
> + * before dereferencing.
> + */
> +struct u_transfer {
> + struct pipe_transfer base;
> + /* Note that in case of MSAA resolve for transfer plus z32s8 or fake rgtc
> + * we end up with stacked u_transfer's. The MSAA resolve case doesn't call
> + * helper->vtbl fxns directly, but calls back to pctx->transfer_map()/etc
> + * so the format related handling can work in conjunction with MSAA resolve.
> + */
> + struct pipe_transfer *trans; /* driver's transfer */
> + struct pipe_transfer *trans2; /* 2nd transfer for s8 stencil buffer in z32s8 */
> + void *ptr, *ptr2; /* ptr to trans, and trans2 */
> + void *staging; /* staging buffer */
> + struct pipe_resource *ss; /* staging resource for MSAA resolves */
> +};
> +
> +static inline struct u_transfer *
> +u_transfer(struct pipe_transfer *ptrans)
> +{
> + debug_assert(handle_transfer(ptrans->resource));
> + return (struct u_transfer *)ptrans;
> +}
> +
> +struct pipe_resource *
> +u_transfer_helper_resource_create(struct pipe_screen *pscreen,
> + const struct pipe_resource *templ)
> +{
> + struct u_transfer_helper *helper = pscreen->transfer_helper;
> + enum pipe_format format = templ->format;
> + struct pipe_resource *prsc;
> +
> + if ((format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT) && helper->separate_z32s8) {
> + struct pipe_resource t = *templ;
> + struct pipe_resource *stencil;
> +
> + t.format = PIPE_FORMAT_Z32_FLOAT;
> +
> + prsc = helper->vtbl->resource_create(pscreen, &t);
> + if (!prsc)
> + return NULL;
> +
> + prsc->format = format; /* frob the format back to the "external" format */
> +
> + t.format = PIPE_FORMAT_S8_UINT;
> + stencil = helper->vtbl->resource_create(pscreen, &t);
> +
> + if (!stencil) {
> + helper->vtbl->resource_destroy(pscreen, prsc);
> + return NULL;
> + }
> +
> + helper->vtbl->set_stencil(prsc, stencil);
> + } else if ((util_format_description(format)->layout == UTIL_FORMAT_LAYOUT_RGTC) &&
> + helper->fake_rgtc) {
> + struct pipe_resource t = *templ;
> + t.format = PIPE_FORMAT_R8G8B8A8_UNORM;
> +
> + prsc = helper->vtbl->resource_create(pscreen, &t);
> + if (!prsc)
> + return NULL;
> +
> + prsc->format = format; /* frob the format back to the "external" format */
> + } else {
> + /* normal case, no special handling: */
> + prsc = helper->vtbl->resource_create(pscreen, templ);
> + if (!prsc)
> + return NULL;
> + }
> +
> + return prsc;
> +}
> +
> +void
> +u_transfer_helper_resource_destroy(struct pipe_screen *pscreen,
> + struct pipe_resource *prsc)
> +{
> + struct u_transfer_helper *helper = pscreen->transfer_helper;
> +
> + if (helper->vtbl->get_stencil) {
> + struct pipe_resource *stencil = helper->vtbl->get_stencil(prsc);
> +
> + if (stencil)
> + helper->vtbl->resource_destroy(pscreen, stencil);
> + }
> +
> + helper->vtbl->resource_destroy(pscreen, prsc);
> +}
> +
> +static bool needs_pack(unsigned usage)
> +{
> + return (usage & PIPE_TRANSFER_READ) &&
> + !(usage & (PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE | PIPE_TRANSFER_DISCARD_RANGE));
> +}
> +
> +/* In the case of transfer_map of a multi-sample resource, call back into
> + * pctx->transfer_map() to map the staging resource, to handle cases of
> + * MSAA + separate_z32s8 or fake_rgtc
> + */
> +static void *
> +transfer_map_msaa(struct pipe_context *pctx,
> + struct pipe_resource *prsc,
> + unsigned level, unsigned usage,
> + const struct pipe_box *box,
> + struct pipe_transfer **pptrans)
> +{
> + struct pipe_screen *pscreen = pctx->screen;
> + struct u_transfer *trans = calloc(1, sizeof(*trans));
> + if (!trans)
> + return NULL;
> + struct pipe_transfer *ptrans = &trans->base;
> +
> + pipe_resource_reference(&ptrans->resource, prsc);
> + ptrans->level = level;
> + ptrans->usage = usage;
> + ptrans->box = *box;
> +
> + struct pipe_resource tmpl = {
> + .target = prsc->target,
> + .format = prsc->format,
> + .width0 = box->width,
> + .height0 = box->height,
> + .depth0 = 1,
> + .array_size = 1,
> + };
> + trans->ss = pscreen->resource_create(pscreen, &tmpl);
> + if (!trans->ss) {
> + free(trans);
> + return NULL;
> + }
> +
> + if (needs_pack(usage)) {
> + struct pipe_blit_info blit;
> + memset(&blit, 0, sizeof(blit));
> +
> + blit.src.resource = ptrans->resource;
> + blit.src.format = ptrans->resource->format;
> + blit.src.level = ptrans->level;
> + blit.src.box = *box;
> +
> + blit.dst.resource = trans->ss;
> + blit.dst.format = trans->ss->format;
> + blit.dst.box.width = box->width;
> + blit.dst.box.height = box->height;
> + blit.dst.box.depth = 1;
> +
> + blit.mask = util_format_get_mask(prsc->format);
> + blit.filter = PIPE_TEX_FILTER_NEAREST;
> +
> + pctx->blit(pctx, &blit);
> + }
> +
> + void *ss_map = pctx->transfer_map(pctx, trans->ss, 0, usage, box,
> + &trans->trans);
> + if (!ss_map) {
> + free(trans);
> + return NULL;
> + }
> +
> + *pptrans = ptrans;
> + return ss_map;
> +}
> +
> +void *
> +u_transfer_helper_transfer_map(struct pipe_context *pctx,
> + struct pipe_resource *prsc,
> + unsigned level, unsigned usage,
> + const struct pipe_box *box,
> + struct pipe_transfer **pptrans)
> +{
> + struct u_transfer_helper *helper = pctx->screen->transfer_helper;
> + struct u_transfer *trans;
> + struct pipe_transfer *ptrans;
> + enum pipe_format format = prsc->format;
> + unsigned width = box->width;
> + unsigned height = box->height;
> +
> + if (!handle_transfer(prsc))
> + return helper->vtbl->transfer_map(pctx, prsc, level, usage, box, pptrans);
> +
> + if (helper->msaa_map && (prsc->nr_samples > 1))
> + return transfer_map_msaa(pctx, prsc, level, usage, box, pptrans);
> +
> + debug_assert(box->depth == 1);
> +
> + trans = calloc(1, sizeof(*trans));
> + if (!trans)
> + return NULL;
> +
> + ptrans = &trans->base;
> + pipe_resource_reference(&ptrans->resource, prsc);
> + ptrans->level = level;
> + ptrans->usage = usage;
> + ptrans->box = *box;
> + ptrans->stride = util_format_get_stride(format, box->width);
> + ptrans->layer_stride = ptrans->stride * box->height;
> +
> + trans->staging = malloc(ptrans->layer_stride);
> + if (!trans->staging)
> + goto fail;
> +
> + trans->ptr = helper->vtbl->transfer_map(pctx, prsc, level, usage, box,
> + &trans->trans);
> + if (!trans->ptr)
> + goto fail;
> +
> + if (prsc->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT) {
> + struct pipe_resource *stencil = helper->vtbl->get_stencil(prsc);
> + trans->ptr2 = helper->vtbl->transfer_map(pctx, stencil, level,
> + usage, box, &trans->trans2);
> +
> + if (needs_pack(usage)) {
> + util_format_z32_float_s8x24_uint_pack_z_float(trans->staging,
> + ptrans->stride,
> + trans->ptr,
> + trans->trans->stride,
> + width, height);
> + util_format_z32_float_s8x24_uint_pack_s_8uint(trans->staging,
> + ptrans->stride,
> + trans->ptr2,
> + trans->trans2->stride,
> + width, height);
> + }
> + } else if (needs_pack(usage) &&
> + util_format_description(prsc->format)->layout == UTIL_FORMAT_LAYOUT_RGTC) {
> + switch (prsc->format) {
> + case PIPE_FORMAT_RGTC1_UNORM:
> + case PIPE_FORMAT_RGTC1_SNORM:
> + case PIPE_FORMAT_LATC1_UNORM:
> + case PIPE_FORMAT_LATC1_SNORM:
> + util_format_rgtc1_unorm_pack_rgba_8unorm(trans->staging,
> + ptrans->stride,
> + trans->ptr,
> + trans->trans->stride,
> + width, height);
> + break;
> + case PIPE_FORMAT_RGTC2_UNORM:
> + case PIPE_FORMAT_RGTC2_SNORM:
> + case PIPE_FORMAT_LATC2_UNORM:
> + case PIPE_FORMAT_LATC2_SNORM:
> + util_format_rgtc2_unorm_pack_rgba_8unorm(trans->staging,
> + ptrans->stride,
> + trans->ptr,
> + trans->trans->stride,
> + width, height);
> + break;
> + default:
> + assert(!"Unexpected format");
> + break;
> + }
> + } else {
> + unreachable("bleh");
> + }
> +
> + *pptrans = ptrans;
> + return trans->staging;
> +
> +fail:
> + if (trans->trans)
> + helper->vtbl->transfer_unmap(pctx, trans->trans);
> + if (trans->trans2)
> + helper->vtbl->transfer_unmap(pctx, trans->trans2);
> + pipe_resource_reference(&ptrans->resource, NULL);
> + free(trans->staging);
> + free(trans);
> + return NULL;
> +}
> +
> +static void
> +flush_region(struct pipe_context *pctx, struct pipe_transfer *ptrans,
> + const struct pipe_box *box)
> +{
> + struct u_transfer_helper *helper = pctx->screen->transfer_helper;
> + struct u_transfer *trans = u_transfer(ptrans);
> + enum pipe_format iformat, format = ptrans->resource->format;
> + unsigned width = box->width;
> + unsigned height = box->height;
> + void *src, *dst;
> +
> + if (!(ptrans->usage & PIPE_TRANSFER_WRITE))
> + return;
> +
> + if (trans->ss) {
> + struct pipe_blit_info blit;
> + memset(&blit, 0, sizeof(blit));
> +
> + blit.src.resource = trans->ss;
> + blit.src.format = trans->ss->format;
> + blit.src.box = *box;
> +
> + blit.dst.resource = ptrans->resource;
> + blit.dst.format = ptrans->resource->format;
> + blit.dst.level = ptrans->level;
> + blit.dst.box = ptrans->box;
I think this should be:
u_box_2d(ptrans->box.x + box->x,
ptrans->box.y + box->y,
box->width, box->height,
&blit.dst.box);
> +
> + blit.mask = util_format_get_mask(ptrans->resource->format);
> + blit.filter = PIPE_TEX_FILTER_NEAREST;
> +
> + pctx->blit(pctx, &blit);
> +
> + return;
> + }
> +
> + iformat = helper->vtbl->get_internal_format(ptrans->resource);
> +
> + src = (uint8_t *)trans->staging +
> + (box->y * ptrans->stride) +
> + (box->x * util_format_get_blocksize(format));
> + dst = (uint8_t *)trans->ptr +
> + (box->x * trans->trans->stride) +
> + (box->y * util_format_get_blocksize(iformat));
x/y are swapped here.
> +
> + switch (format) {
> + case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
> + util_format_z32_float_s8x24_uint_unpack_z_float(dst,
> + trans->trans->stride,
> + src,
> + ptrans->stride,
> + width, height);
> + /* fallthru */
> + case PIPE_FORMAT_X32_S8X24_UINT:
> + dst = (uint8_t *)trans->ptr2 +
> + (box->x * trans->trans2->stride) +
> + (box->y * util_format_get_blocksize(PIPE_FORMAT_S8_UINT));
> +
> + util_format_z32_float_s8x24_uint_unpack_s_8uint(dst,
> + trans->trans2->stride,
> + src,
> + ptrans->stride,
> + width, height);
> + break;
> + case PIPE_FORMAT_RGTC1_UNORM:
> + case PIPE_FORMAT_RGTC1_SNORM:
> + case PIPE_FORMAT_LATC1_UNORM:
> + case PIPE_FORMAT_LATC1_SNORM:
> + util_format_rgtc1_unorm_unpack_rgba_8unorm(dst,
> + trans->trans->stride,
> + src,
> + ptrans->stride,
> + width, height);
> + break;
> + case PIPE_FORMAT_RGTC2_UNORM:
> + case PIPE_FORMAT_RGTC2_SNORM:
> + case PIPE_FORMAT_LATC2_UNORM:
> + case PIPE_FORMAT_LATC2_SNORM:
> + util_format_rgtc2_unorm_unpack_rgba_8unorm(dst,
> + trans->trans->stride,
> + src,
> + ptrans->stride,
> + width, height);
> + break;
> + default:
> + assert(!"Unexpected staging transfer type");
> + break;
> + }
> +}
> diff --git a/src/gallium/auxiliary/util/u_transfer_helper.h b/src/gallium/auxiliary/util/u_transfer_helper.h
> new file mode 100644
> index 00000000000..f858566e7a6
> --- /dev/null
> +++ b/src/gallium/auxiliary/util/u_transfer_helper.h
> +/* A helper to implement various "lowering" for transfers:
> + *
> + * - exposing separate z32 and s8 as z32x24s8
> + * - fake RGTC support for GLES class hardware which needs it to expose GL3+
> + * - MSAA resolves
> + *
> + * To use this, drivers should:
> + *
> + * 1) populate u_transfer_vtbl and plug that into pipe_screen::transfer_helper
> + * 2) plug the the transfer helpers into pipe_screen/pipe_context
Still: s/the the/the/
With these fixed, r-b.
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