wine/vkd3d
0
0
Fork 0
mirror of https://gitlab.winehq.org/wine/vkd3d.git synced 2025-09-12 18:50:22 -07:00
Code Issues Packages Projects Releases Wiki Activity

vkd3d: Store a heap array index in each CBV/SRV/UAV descriptor.

Browse Source 
A pointer to the containing descriptor heap can be derived from this
information.

PE build of vkd3d uses Windows critical sections for synchronisation,
and these slow down on the very high lock/unlock rate during multithreaded
descriptor copying in Shadow of the Tomb Raider. This patch speeds up the
demo by about 8%. By comparison, using SRW locks in the allocators and
locking them for read only where applicable is about 4% faster.
This commit is contained in:
Conor McCarthy
2023-01-25 15:25:48 +10:00
committed by Alexandre Julliard
parent d14f42be9d
commit 3db509383b
Notes: Alexandre Julliard 2023-01-25 22:43:21 +01:00 
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/67
4 changed files with 149 additions and 334 deletions
Download Patch File Download Diff File Expand all files Collapse all files

174
libs/vkd3d/resource.c
View File

@@ -2137,14 +2137,14 @@ static void d3d12_descriptor_heap_write_vk_descriptor_range(struct d3d12_descrip
{
unsigned int i, info_index = 0, write_index = 0;
switch (locations[0].src.vk_descriptor_type)
switch (locations[0].src.s.vk_descriptor_type)
{
case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER:
for (; write_index < write_count; ++write_index)
{
descriptor_set->vk_descriptor_writes[write_index].pBufferInfo = &descriptor_set->vk_buffer_infos[info_index];
for (i = 0; i < descriptor_set->vk_descriptor_writes[write_index].descriptorCount; ++i, ++info_index)
descriptor_set->vk_buffer_infos[info_index] = locations[info_index].src.u.vk_cbv_info;
descriptor_set->vk_buffer_infos[info_index] = locations[info_index].src.s.u.vk_cbv_info;
}
break;
case VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE:
@@ -2153,7 +2153,7 @@ static void d3d12_descriptor_heap_write_vk_descriptor_range(struct d3d12_descrip
{
descriptor_set->vk_descriptor_writes[write_index].pImageInfo = &descriptor_set->vk_image_infos[info_index];
for (i = 0; i < descriptor_set->vk_descriptor_writes[write_index].descriptorCount; ++i, ++info_index)
descriptor_set->vk_image_infos[info_index].imageView = locations[info_index].src.u.view_info.view->u.vk_image_view;
descriptor_set->vk_image_infos[info_index].imageView = locations[info_index].src.s.u.view_info.view->u.vk_image_view;
}
break;
case VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER:
@@ -2162,7 +2162,7 @@ static void d3d12_descriptor_heap_write_vk_descriptor_range(struct d3d12_descrip
{
descriptor_set->vk_descriptor_writes[write_index].pTexelBufferView = &descriptor_set->vk_buffer_views[info_index];
for (i = 0; i < descriptor_set->vk_descriptor_writes[write_index].descriptorCount; ++i, ++info_index)
descriptor_set->vk_buffer_views[info_index] = locations[info_index].src.u.view_info.view->u.vk_buffer_view;
descriptor_set->vk_buffer_views[info_index] = locations[info_index].src.s.u.view_info.view->u.vk_buffer_view;
}
break;
case VK_DESCRIPTOR_TYPE_SAMPLER:
@@ -2170,11 +2170,11 @@ static void d3d12_descriptor_heap_write_vk_descriptor_range(struct d3d12_descrip
{
descriptor_set->vk_descriptor_writes[write_index].pImageInfo = &descriptor_set->vk_image_infos[info_index];
for (i = 0; i < descriptor_set->vk_descriptor_writes[write_index].descriptorCount; ++i, ++info_index)
descriptor_set->vk_image_infos[info_index].sampler = locations[info_index].src.u.view_info.view->u.vk_sampler;
descriptor_set->vk_image_infos[info_index].sampler = locations[info_index].src.s.u.view_info.view->u.vk_sampler;
}
break;
default:
ERR("Unhandled descriptor type %#x.\n", locations[0].src.vk_descriptor_type);
ERR("Unhandled descriptor type %#x.\n", locations[0].src.s.vk_descriptor_type);
break;
}
}
@@ -2230,36 +2230,35 @@ static void d3d12_desc_write_vk_heap(const struct d3d12_desc *dst, const struct
const struct vkd3d_vk_device_procs *vk_procs;
bool is_null = false;
descriptor_heap = vkd3d_gpu_descriptor_allocator_heap_from_descriptor(&device->gpu_descriptor_allocator, dst);
descriptor_heap = d3d12_desc_get_descriptor_heap(dst);
descriptor_set = &descriptor_heap->vk_descriptor_sets[vkd3d_vk_descriptor_set_index_from_vk_descriptor_type(
src->vk_descriptor_type)];
src->s.vk_descriptor_type)];
vk_procs = &device->vk_procs;
vkd3d_mutex_lock(&descriptor_heap->vk_sets_mutex);
descriptor_set->vk_descriptor_writes[0].dstArrayElement = dst
- (const struct d3d12_desc *)descriptor_heap->descriptors;
descriptor_set->vk_descriptor_writes[0].dstArrayElement = dst->index;
descriptor_set->vk_descriptor_writes[0].descriptorCount = 1;
switch (src->vk_descriptor_type)
switch (src->s.vk_descriptor_type)
{
case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER:
descriptor_set->vk_descriptor_writes[0].pBufferInfo = &src->u.vk_cbv_info;
is_null = !src->u.vk_cbv_info.buffer;
descriptor_set->vk_descriptor_writes[0].pBufferInfo = &src->s.u.vk_cbv_info;
is_null = !src->s.u.vk_cbv_info.buffer;
break;
case VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE:
case VK_DESCRIPTOR_TYPE_STORAGE_IMAGE:
is_null = !(descriptor_set->vk_image_infos[0].imageView = src->u.view_info.view->u.vk_image_view);
is_null = !(descriptor_set->vk_image_infos[0].imageView = src->s.u.view_info.view->u.vk_image_view);
break;
case VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER:
case VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER:
descriptor_set->vk_descriptor_writes[0].pTexelBufferView = &src->u.view_info.view->u.vk_buffer_view;
is_null = !src->u.view_info.view->u.vk_buffer_view;
descriptor_set->vk_descriptor_writes[0].pTexelBufferView = &src->s.u.view_info.view->u.vk_buffer_view;
is_null = !src->s.u.view_info.view->u.vk_buffer_view;
break;
case VK_DESCRIPTOR_TYPE_SAMPLER:
descriptor_set->vk_image_infos[0].sampler = src->u.view_info.view->u.vk_sampler;
descriptor_set->vk_image_infos[0].sampler = src->s.u.view_info.view->u.vk_sampler;
break;
default:
ERR("Unhandled descriptor type %#x.\n", src->vk_descriptor_type);
ERR("Unhandled descriptor type %#x.\n", src->s.vk_descriptor_type);
break;
}
if (is_null && device->vk_info.EXT_robustness2)
@@ -2272,13 +2271,12 @@ static void d3d12_desc_write_vk_heap(const struct d3d12_desc *dst, const struct
VK_CALL(vkUpdateDescriptorSets(device->vk_device, 1, descriptor_set->vk_descriptor_writes, 0, NULL));
if (src->magic == VKD3D_DESCRIPTOR_MAGIC_UAV && src->u.view_info.view->vk_counter_view)
if (src->s.magic == VKD3D_DESCRIPTOR_MAGIC_UAV && src->s.u.view_info.view->vk_counter_view)
{
descriptor_set = &descriptor_heap->vk_descriptor_sets[VKD3D_SET_INDEX_UAV_COUNTER];
descriptor_set->vk_descriptor_writes[0].dstArrayElement = dst
- (const struct d3d12_desc *)descriptor_heap->descriptors;
descriptor_set->vk_descriptor_writes[0].dstArrayElement = dst->index;
descriptor_set->vk_descriptor_writes[0].descriptorCount = 1;
descriptor_set->vk_descriptor_writes[0].pTexelBufferView = &src->u.view_info.view->vk_counter_view;
descriptor_set->vk_descriptor_writes[0].pTexelBufferView = &src->s.u.view_info.view->vk_counter_view;
VK_CALL(vkUpdateDescriptorSets(device->vk_device, 1, descriptor_set->vk_descriptor_writes, 0, NULL));
}
@@ -2293,15 +2291,15 @@ static void d3d12_desc_write_atomic_d3d12_only(struct d3d12_desc *dst, const str
mutex = d3d12_device_get_descriptor_mutex(device, dst);
vkd3d_mutex_lock(mutex);
if (!(dst->magic & VKD3D_DESCRIPTOR_MAGIC_HAS_VIEW) || InterlockedDecrement(&dst->u.view_info.view->refcount))
if (!(dst->s.magic & VKD3D_DESCRIPTOR_MAGIC_HAS_VIEW) || InterlockedDecrement(&dst->s.u.view_info.view->refcount))
{
*dst = *src;
d3d12_desc_copy_raw(dst, src);
vkd3d_mutex_unlock(mutex);
return;
}
defunct_view = dst->u.view_info.view;
*dst = *src;
defunct_view = dst->s.u.view_info.view;
d3d12_desc_copy_raw(dst, src);
vkd3d_mutex_unlock(mutex);
/* Destroy the view after unlocking to reduce wait time. */
@@ -2318,11 +2316,11 @@ void d3d12_desc_write_atomic(struct d3d12_desc *dst, const struct d3d12_desc *sr
vkd3d_mutex_lock(mutex);
/* Nothing to do for VKD3D_DESCRIPTOR_MAGIC_CBV. */
if ((dst->magic & VKD3D_DESCRIPTOR_MAGIC_HAS_VIEW)
&& !InterlockedDecrement(&dst->u.view_info.view->refcount))
defunct_view = dst->u.view_info.view;
if ((dst->s.magic & VKD3D_DESCRIPTOR_MAGIC_HAS_VIEW)
&& !InterlockedDecrement(&dst->s.u.view_info.view->refcount))
defunct_view = dst->s.u.view_info.view;
*dst = *src;
d3d12_desc_copy_raw(dst, src);
vkd3d_mutex_unlock(mutex);
@@ -2330,7 +2328,7 @@ void d3d12_desc_write_atomic(struct d3d12_desc *dst, const struct d3d12_desc *sr
if (defunct_view)
vkd3d_view_destroy(defunct_view, device);
if (device->use_vk_heaps && dst->magic)
if (device->use_vk_heaps && dst->s.magic)
d3d12_desc_write_vk_heap(dst, src, device);
}
@@ -2360,6 +2358,7 @@ void d3d12_desc_copy_vk_heap_range(struct d3d12_desc_copy_location *locations, c
++descriptor_set->vk_descriptor_writes[write_count - 1].descriptorCount;
continue;
}
/* Accessing dst->index will be slow if a cache miss occurs, so calculate instead. */
descriptor_set->vk_descriptor_writes[write_count].dstArrayElement = locations[i].dst
- (const struct d3d12_desc *)descriptor_heap->descriptors;
descriptor_set->vk_descriptor_writes[write_count++].descriptorCount = 1;
@@ -2377,10 +2376,11 @@ void d3d12_desc_copy_vk_heap_range(struct d3d12_desc_copy_location *locations, c
for (i = 0, write_count = 0; i < info->count; ++i)
{
if (!locations[i].src.u.view_info.view->vk_counter_view)
if (!locations[i].src.s.u.view_info.view->vk_counter_view)
continue;
descriptor_set->vk_buffer_views[write_count] = locations[i].src.u.view_info.view->vk_counter_view;
descriptor_set->vk_buffer_views[write_count] = locations[i].src.s.u.view_info.view->vk_counter_view;
descriptor_set->vk_descriptor_writes[write_count].pTexelBufferView = &descriptor_set->vk_buffer_views[write_count];
/* Accessing dst->index will be slow if a cache miss occurs, so calculate instead. */
descriptor_set->vk_descriptor_writes[write_count].dstArrayElement = locations[i].dst
- (const struct d3d12_desc *)descriptor_heap->descriptors;
descriptor_set->vk_descriptor_writes[write_count++].descriptorCount = 1;
@@ -2404,10 +2404,10 @@ void d3d12_desc_copy(struct d3d12_desc *dst, const struct d3d12_desc *src,
mutex = d3d12_device_get_descriptor_mutex(device, src);
vkd3d_mutex_lock(mutex);
if (src->magic & VKD3D_DESCRIPTOR_MAGIC_HAS_VIEW)
vkd3d_view_incref(src->u.view_info.view);
if (src->s.magic & VKD3D_DESCRIPTOR_MAGIC_HAS_VIEW)
vkd3d_view_incref(src->s.u.view_info.view);
tmp = *src;
d3d12_desc_copy_raw(&tmp, src);
vkd3d_mutex_unlock(mutex);
@@ -2825,7 +2825,7 @@ void d3d12_desc_create_cbv(struct d3d12_desc *descriptor,
return;
}
buffer_info = &descriptor->u.vk_cbv_info;
buffer_info = &descriptor->s.u.vk_cbv_info;
if (desc->BufferLocation)
{
resource = vkd3d_gpu_va_allocator_dereference(&device->gpu_va_allocator, desc->BufferLocation);
@@ -2841,8 +2841,8 @@ void d3d12_desc_create_cbv(struct d3d12_desc *descriptor,
buffer_info->range = VK_WHOLE_SIZE;
}
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_CBV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_CBV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
}
static unsigned int vkd3d_view_flags_from_d3d12_buffer_srv_flags(D3D12_BUFFER_SRV_FLAGS flags)
@@ -2878,10 +2878,10 @@ static void vkd3d_create_null_srv(struct d3d12_desc *descriptor,
vkd3d_get_format(device, DXGI_FORMAT_R32_UINT, false),
0, VKD3D_NULL_BUFFER_SIZE, &view))
{
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
return;
@@ -2923,10 +2923,10 @@ static void vkd3d_create_null_srv(struct d3d12_desc *descriptor,
if (!vkd3d_create_texture_view(device, vk_image, &vkd3d_desc, &view))
return;
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
static void vkd3d_create_buffer_srv(struct d3d12_desc *descriptor,
@@ -2954,10 +2954,10 @@ static void vkd3d_create_buffer_srv(struct d3d12_desc *descriptor,
desc->u.Buffer.StructureByteStride, flags, &view))
return;
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
static VkImageAspectFlags vk_image_aspect_flags_from_d3d12_plane_slice(const struct vkd3d_format *format,
@@ -3085,10 +3085,10 @@ void d3d12_desc_create_srv(struct d3d12_desc *descriptor,
if (!vkd3d_create_texture_view(device, resource->u.vk_image, &vkd3d_desc, &view))
return;
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_SRV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
static unsigned int vkd3d_view_flags_from_d3d12_buffer_uav_flags(D3D12_BUFFER_UAV_FLAGS flags)
@@ -3124,10 +3124,10 @@ static void vkd3d_create_null_uav(struct d3d12_desc *descriptor,
vkd3d_get_format(device, DXGI_FORMAT_R32_UINT, false),
0, VKD3D_NULL_BUFFER_SIZE, &view))
{
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
return;
@@ -3169,10 +3169,10 @@ static void vkd3d_create_null_uav(struct d3d12_desc *descriptor,
if (!vkd3d_create_texture_view(device, vk_image, &vkd3d_desc, &view))
return;
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
static void vkd3d_create_buffer_uav(struct d3d12_desc *descriptor, struct d3d12_device *device,
@@ -3200,10 +3200,10 @@ static void vkd3d_create_buffer_uav(struct d3d12_desc *descriptor, struct d3d12_
desc->u.Buffer.StructureByteStride, flags, &view))
return;
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
if (counter_resource)
{
@@ -3276,10 +3276,10 @@ static void vkd3d_create_texture_uav(struct d3d12_desc *descriptor,
if (!vkd3d_create_texture_view(device, resource->u.vk_image, &vkd3d_desc, &view))
return;
descriptor->magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
descriptor->u.view_info.view = view;
descriptor->u.view_info.written_serial_id = view->serial_id;
descriptor->s.magic = VKD3D_DESCRIPTOR_MAGIC_UAV;
descriptor->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
descriptor->s.u.view_info.view = view;
descriptor->s.u.view_info.written_serial_id = view->serial_id;
}
void d3d12_desc_create_uav(struct d3d12_desc *descriptor, struct d3d12_device *device,
@@ -3439,10 +3439,10 @@ void d3d12_desc_create_sampler(struct d3d12_desc *sampler,
return;
}
sampler->magic = VKD3D_DESCRIPTOR_MAGIC_SAMPLER;
sampler->vk_descriptor_type = VK_DESCRIPTOR_TYPE_SAMPLER;
sampler->u.view_info.view = view;
sampler->u.view_info.written_serial_id = view->serial_id;
sampler->s.magic = VKD3D_DESCRIPTOR_MAGIC_SAMPLER;
sampler->s.vk_descriptor_type = VK_DESCRIPTOR_TYPE_SAMPLER;
sampler->s.u.view_info.view = view;
sampler->s.u.view_info.written_serial_id = view->serial_id;
}
HRESULT vkd3d_create_static_sampler(struct d3d12_device *device,
@@ -3708,9 +3708,6 @@ static ULONG STDMETHODCALLTYPE d3d12_descriptor_heap_Release(ID3D12DescriptorHea
d3d12_desc_destroy(&descriptors[i], device);
}
if (device->vk_info.EXT_descriptor_indexing && !vkd3d_gpu_descriptor_allocator_unregister_range(
&device->gpu_descriptor_allocator, descriptors))
ERR("Failed to unregister descriptor range.\n");
break;
}
@@ -4025,6 +4022,8 @@ HRESULT d3d12_descriptor_heap_create(struct d3d12_device *device,
{
size_t max_descriptor_count, descriptor_size;
struct d3d12_descriptor_heap *object;
struct d3d12_desc *dst;
unsigned int i;
HRESULT hr;
if (!(descriptor_size = d3d12_device_get_descriptor_handle_increment_size(device, desc->Type)))
@@ -4057,12 +4056,19 @@ HRESULT d3d12_descriptor_heap_create(struct d3d12_device *device,
return hr;
}
memset(object->descriptors, 0, descriptor_size * desc->NumDescriptors);
if ((desc->Type == D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV || desc->Type == D3D12_DESCRIPTOR_HEAP_TYPE_SAMPLER)
&& device->vk_info.EXT_descriptor_indexing && !vkd3d_gpu_descriptor_allocator_register_range(
&device->gpu_descriptor_allocator, (struct d3d12_desc *)object->descriptors, desc->NumDescriptors))
ERR("Failed to register descriptor range.\n");
if (desc->Type == D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV || desc->Type == D3D12_DESCRIPTOR_HEAP_TYPE_SAMPLER)
{
dst = (struct d3d12_desc *)object->descriptors;
for (i = 0; i < desc->NumDescriptors; ++i)
{
memset(&dst[i].s, 0, sizeof(dst[i].s));
dst[i].index = i;
}
}
else
{
memset(object->descriptors, 0, descriptor_size * desc->NumDescriptors);
}
TRACE("Created descriptor heap %p.\n", object);