[Mesa-dev] [PATCH 1/2] gallium/util: add u_transfer_helper
Rob Clark
robdclark at gmail.com
Mon Dec 4 17:05:21 UTC 2017
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.
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 | 486 +++++++++++++++++++++++++
src/gallium/auxiliary/util/u_transfer_helper.h | 132 +++++++
src/gallium/include/pipe/p_screen.h | 8 +-
5 files changed, 629 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..6f7a36a5f6d
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_transfer_helper.c
@@ -0,0 +1,486 @@
+/*
+ * 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 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 *trans = u_transfer(ptrans);
+ enum pipe_format format = ptrans->resource->format;
+ unsigned width = ptrans->box.width;
+ unsigned height = ptrans->box.height;
+
+ 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.width = ptrans->box.width;
+ blit.src.box.height = ptrans->box.height;
+ blit.src.box.depth = 1;
+
+ blit.dst.resource = ptrans->resource;
+ blit.dst.format = ptrans->resource->format;
+ blit.dst.level = ptrans->level;
+ blit.dst.box = ptrans->box;
+
+ blit.mask = util_format_get_mask(ptrans->resource->format);
+ blit.filter = PIPE_TEX_FILTER_NEAREST;
+
+ pctx->blit(pctx, &blit);
+
+ return;
+ }
+
+ switch (format) {
+ case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+ util_format_z32_float_s8x24_uint_unpack_z_float(trans->ptr,
+ trans->trans->stride,
+ trans->staging,
+ ptrans->stride,
+ width, height);
+ /* fallthru */
+ case PIPE_FORMAT_X32_S8X24_UINT:
+ util_format_z32_float_s8x24_uint_unpack_s_8uint(trans->ptr2,
+ trans->trans2->stride,
+ trans->staging,
+ 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(trans->ptr,
+ trans->trans->stride,
+ trans->staging,
+ 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(trans->ptr,
+ trans->trans->stride,
+ trans->staging,
+ ptrans->stride,
+ width, height);
+ break;
+ default:
+ assert(!"Unexpected staging transfer type");
+ break;
+ }
+}
+
+void
+u_transfer_helper_transfer_flush_region(struct pipe_context *pctx,
+ struct pipe_transfer *ptrans,
+ const struct pipe_box *box)
+{
+ struct u_transfer_helper *helper = pctx->screen->transfer_helper;
+
+ if (handle_transfer(ptrans->resource)) {
+ struct u_transfer *trans = u_transfer(ptrans);
+
+ flush_region(pctx, ptrans, box);
+
+ /* handle MSAA case, since there could be multiple levels of
+ * wrapped transfer, call pctx->transfer_flush_region()
+ * instead of helper->vtbl->transfer_flush_region()
+ */
+ if (trans->ss) {
+ pctx->transfer_flush_region(pctx, trans->trans, box);
+ return;
+ }
+
+ helper->vtbl->transfer_flush_region(pctx, trans->trans, box);
+ if (trans->trans2)
+ helper->vtbl->transfer_flush_region(pctx, trans->trans2, box);
+
+ } else {
+ helper->vtbl->transfer_flush_region(pctx, ptrans, box);
+ }
+}
+
+void
+u_transfer_helper_transfer_unmap(struct pipe_context *pctx,
+ struct pipe_transfer *ptrans)
+{
+ struct u_transfer_helper *helper = pctx->screen->transfer_helper;
+
+ if (handle_transfer(ptrans->resource)) {
+ struct u_transfer *trans = u_transfer(ptrans);
+
+ if (!(ptrans->usage & PIPE_TRANSFER_FLUSH_EXPLICIT)) {
+ struct pipe_box box;
+ u_box_2d(0, 0, ptrans->box.width, ptrans->box.height, &box);
+ flush_region(pctx, ptrans, &box);
+ }
+
+ /* in MSAA case, there could be multiple levels of wrapping
+ * so don't call helper->vtbl->transfer_unmap() directly
+ */
+ if (trans->ss) {
+ pctx->transfer_unmap(pctx, trans->trans);
+ pipe_resource_reference(&trans->ss, NULL);
+ } else {
+ helper->vtbl->transfer_unmap(pctx, trans->trans);
+ if (trans->trans2)
+ helper->vtbl->transfer_unmap(pctx, trans->trans2);
+ }
+
+ free(trans);
+ } else {
+ helper->vtbl->transfer_unmap(pctx, ptrans);
+ }
+}
+
+struct u_transfer_helper *
+u_transfer_helper_create(const struct u_transfer_vtbl *vtbl,
+ bool separate_z32s8,
+ bool fake_rgtc,
+ bool msaa_map)
+{
+ struct u_transfer_helper *helper = calloc(1, sizeof(*helper));
+
+ helper->vtbl = vtbl;
+ helper->separate_z32s8 = separate_z32s8;
+ helper->fake_rgtc = fake_rgtc;
+ helper->msaa_map = msaa_map;
+
+ return helper;
+}
+
+void
+u_transfer_helper_destroy(struct u_transfer_helper *helper)
+{
+ free(helper);
+}
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..392b34f0697
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_transfer_helper.h
@@ -0,0 +1,132 @@
+/*
+ * 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.
+ */
+
+#ifndef _U_TRANSFER_HELPER_H
+#define _U_TRANSFER_HELPER_H
+
+#include "pipe/p_state.h"
+#include "pipe/p_context.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* 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
+ *
+ * To avoid subclassing pipe_resource (and conflicting with threaded_context)
+ * the vtbl contains setter/getter methods used for fake_rgct & separate_stencil
+ * to access the internal_format and separate stencil buffer.
+ */
+
+struct u_transfer_vtbl {
+ /* NOTE I am not expecting resource_create_from_handle() or
+ * resource_create_with_modifiers() paths to be creating any
+ * resources that need special handling. Otherwise they would
+ * need to be wrapped too.
+ */
+ struct pipe_resource * (*resource_create)(struct pipe_screen *pscreen,
+ const struct pipe_resource *templ);
+
+ void (*resource_destroy)(struct pipe_screen *pscreen,
+ struct pipe_resource *prsc);
+
+ void *(*transfer_map)(struct pipe_context *pctx,
+ struct pipe_resource *prsc,
+ unsigned level,
+ unsigned usage,
+ const struct pipe_box *box,
+ struct pipe_transfer **pptrans);
+
+
+ void (*transfer_flush_region)(struct pipe_context *pctx,
+ struct pipe_transfer *ptrans,
+ const struct pipe_box *box);
+
+ void (*transfer_unmap)(struct pipe_context *pctx,
+ struct pipe_transfer *ptrans);
+
+ /*
+ * auxiliary methods to access internal format, stencil:
+ */
+
+ /**
+ * Must be implemented if separate_z32s8 or fake_rgtc is used. The
+ * internal_format is the format the resource was created with. In
+ * the case of separate_z32s8 or fake_rgtc, prsc->format is set back
+ * to the state tracker visible format (Z32_FLOAT_S8X24_UINT or
+ * PIPE_FORMAT_{RTGC,LATC}* after the resource is created.
+ */
+ enum pipe_format (*get_internal_format)(struct pipe_resource *prsc);
+
+ /**
+ * Must be implemented if separate_z32s8 is used. Used to set/get
+ * the separate s8 stencil buffer.
+ */
+ void (*set_stencil)(struct pipe_resource *prsc, struct pipe_resource *stencil);
+ struct pipe_resource *(*get_stencil)(struct pipe_resource *prsc);
+};
+
+struct pipe_resource *u_transfer_helper_resource_create(
+ struct pipe_screen *pscreen, const struct pipe_resource *templ);
+
+void u_transfer_helper_resource_destroy(struct pipe_screen *pscreen,
+ struct pipe_resource *prsc);
+
+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);
+
+
+void u_transfer_helper_transfer_flush_region(struct pipe_context *pctx,
+ struct pipe_transfer *ptrans,
+ const struct pipe_box *box);
+
+void u_transfer_helper_transfer_unmap(struct pipe_context *pctx,
+ struct pipe_transfer *ptrans);
+
+struct u_transfer_helper;
+
+struct u_transfer_helper * u_transfer_helper_create(const struct u_transfer_vtbl *vtbl,
+ bool separate_z32s8,
+ bool fake_rgtc,
+ bool msaa_map);
+
+void u_transfer_helper_destroy(struct u_transfer_helper *helper);
+
+#ifdef __cplusplus
+} // extern "C" {
+#endif
+
+#endif /* _U_TRANSFER_HELPER_H */
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index c249c7d63b4..101e229088b 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -60,7 +60,7 @@ struct pipe_box;
struct pipe_memory_info;
struct disk_cache;
struct driOptionCache;
-
+struct u_transfer_helper;
/**
* Gallium screen/adapter context. Basically everything
@@ -68,6 +68,12 @@ struct driOptionCache;
* context.
*/
struct pipe_screen {
+
+ /**
+ * For drivers using u_transfer_helper:
+ */
+ struct u_transfer_helper *transfer_helper;
+
void (*destroy)( struct pipe_screen * );
const char *(*get_name)( struct pipe_screen * );
--
2.13.6
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