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vkd3d-shader/spirv: Support runtime descriptor array offsets using push constants.

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Signed-off-by: Conor McCarthy <cmccarthy@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Conor McCarthy
2021-12-03 18:58:58 +10:00
committed by Alexandre Julliard
parent f65884f6b4
commit 3816fa403f
4 changed files with 128 additions and 28 deletions
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36
include/vkd3d_shader.h
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@@ -458,6 +458,12 @@ struct vkd3d_shader_transform_feedback_info
unsigned int buffer_stride_count;
};
struct vkd3d_shader_descriptor_offset
{
unsigned int static_offset;
unsigned int dynamic_offset_index;
};
/**
* A chained structure containing descriptor offsets.
*
@@ -477,10 +483,28 @@ struct vkd3d_shader_descriptor_offset_info
const void *next;
/**
* Pointer to an array of offsets into the descriptor arrays referenced by
* the 'bindings' array in struct vkd3d_shader_interface_info. This allows
* mapping multiple shader resource arrays to a single binding point in
* the target environment.
* Byte offset within the push constants of an array of 32-bit
* descriptor array offsets. See the description of 'binding_offsets'
* below.
*/
unsigned int descriptor_table_offset;
/** Size, in elements, of the descriptor table push constant array. */
unsigned int descriptor_table_count;
/**
* Pointer to an array of struct vkd3d_shader_descriptor_offset objects.
* The 'static_offset' field contains an offset into the descriptor arrays
* referenced by the 'bindings' array in struct vkd3d_shader_interface_info.
* This allows mapping multiple shader resource arrays to a single binding
* point in the target environment.
*
* 'dynamic_offset_index' in struct vkd3d_shader_descriptor_offset allows
* offsets to be set at runtime. The 32-bit descriptor table push constant
* at this index will be added to 'static_offset' to calculate the final
* binding offset.
*
* If runtime offsets are not required, set all 'dynamic_offset_index'
* values to \c ~0u and 'descriptor_table_count' to zero.
*
* For example, to map Direct3D constant buffer registers 'cb0[0:3]' and
* 'cb1[6:7]' to descriptors 8-12 and 4-5 in the Vulkan descriptor array in
@@ -508,7 +532,7 @@ struct vkd3d_shader_descriptor_offset_info
* This field may be NULL, in which case the corresponding offsets are
* specified to be 0.
*/
const unsigned int *binding_offsets;
const struct vkd3d_shader_descriptor_offset *binding_offsets;
/**
* Pointer to an array of offsets into the descriptor arrays referenced by
@@ -517,7 +541,7 @@ struct vkd3d_shader_descriptor_offset_info
* not supported in this version of vkd3d-shader, and therefore this field
* must either be NULL or specify 0 offsets.
*/
const unsigned int *uav_counter_offsets;
const struct vkd3d_shader_descriptor_offset *uav_counter_offsets;
};
/** The format of a shader to be compiled or scanned. */