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vkd3d-shader: Introduce a function to build a varying map between sm1 stages.

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This commit is contained in:
Zebediah Figura
2023-07-31 00:45:54 -05:00
committed by Alexandre Julliard
parent d932fba7c3
commit f649db23a5
Notes: Alexandre Julliard 2023-08-03 21:25:28 +09:00 
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/280
2 changed files with 69 additions and 0 deletions
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31
include/vkd3d_shader.h
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@@ -1743,6 +1743,8 @@ struct vkd3d_shader_next_stage_info
* field is necessary to correctly match inter-stage varyings.
* This mapping may also be necessary under other circumstances where the
* varying interface does not match exactly.
*
* This mapping may be constructed by vkd3d_shader_build_varying_map().
*/
const struct vkd3d_shader_varying_map *varying_map;
/** The number of registers provided in \ref varying_map. */
@@ -2262,6 +2264,35 @@ VKD3D_SHADER_API int vkd3d_shader_serialize_dxbc(size_t section_count,
*/
VKD3D_SHADER_API void vkd3d_shader_free_scan_signature_info(struct vkd3d_shader_scan_signature_info *info);
/**
* Build a mapping of output varyings in a shader stage to input varyings in
* the following shader stage.
*
* This mapping should be used in struct vkd3d_shader_next_stage_info to
* compile the first shader.
*
* \param output_signature The output signature of the first shader.
*
* \param input_signature The input signature of the second shader.
*
* \param count On output, contains the number of entries written into
* \ref varyings.
*
* \param varyings Pointer to an output array of varyings.
* This must point to space for N varyings, where N is the number of elements
* in the input signature.
*
* \remark Valid legacy Direct3D pixel shaders have at most 12 varying inputs:
* 10 inter-stage varyings, face, and position.
* Therefore, in practice, it is safe to call this function with a
* pre-allocated array with a fixed size of 12.
*
* \since 1.9
*/
VKD3D_SHADER_API void vkd3d_shader_build_varying_map(const struct vkd3d_shader_signature *output_signature,
const struct vkd3d_shader_signature *input_signature,
unsigned int *count, struct vkd3d_shader_varying_map *varyings);
#endif /* VKD3D_SHADER_NO_PROTOTYPES */
/** Type of vkd3d_shader_get_version(). */