Brecht Van Lommel
9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
|
|
* Copyright 2011-2022 Blender Foundation */
|
|
|
|
#pragma once
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/*
|
|
* Utility functions for work stealing
|
|
*/
|
|
|
|
/* Map global work index to tile, pixel X/Y and sample. */
|
|
ccl_device_inline void get_work_pixel(ccl_global const KernelWorkTile *tile,
|
|
uint global_work_index,
|
|
ccl_private uint *x,
|
|
ccl_private uint *y,
|
|
ccl_private uint *sample)
|
|
{
|
|
uint sample_offset, pixel_offset;
|
|
|
|
if (kernel_data.integrator.scrambling_distance < 0.9f) {
|
|
/* Keep threads for the same sample together. */
|
|
uint tile_pixels = tile->w * tile->h;
|
|
sample_offset = global_work_index / tile_pixels;
|
|
pixel_offset = global_work_index - sample_offset * tile_pixels;
|
|
}
|
|
else {
|
|
/* Keeping threads for the same pixel together.
|
|
* Appears to improve performance by a few % on CUDA and OptiX. */
|
|
sample_offset = global_work_index % tile->num_samples;
|
|
pixel_offset = global_work_index / tile->num_samples;
|
|
}
|
|
|
|
uint y_offset = pixel_offset / tile->w;
|
|
uint x_offset = pixel_offset - y_offset * tile->w;
|
|
|
|
*x = tile->x + x_offset;
|
|
*y = tile->y + y_offset;
|
|
*sample = tile->start_sample + sample_offset;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|