diff options
Diffstat (limited to 'intern/cycles/kernel/film/read.h')
| -rw-r--r-- | intern/cycles/kernel/film/read.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/intern/cycles/kernel/film/read.h b/intern/cycles/kernel/film/read.h index a0236909f4b..108f992e29d 100644 --- a/intern/cycles/kernel/film/read.h +++ b/intern/cycles/kernel/film/read.h @@ -1,6 +1,10 @@ /* SPDX-License-Identifier: Apache-2.0 * Copyright 2011-2022 Blender Foundation */ +/* Functions to retrieving render passes for display or output. Reading from + * the raw render buffer and normalizing based on the number of samples, + * computing alpha, compositing shadow catchers, etc. */ + #pragma once CCL_NAMESPACE_BEGIN @@ -235,6 +239,21 @@ ccl_device_inline void film_get_pass_pixel_float3(ccl_global const KernelFilmCon pixel[0] = f.x; pixel[1] = f.y; pixel[2] = f.z; + + /* Optional alpha channel. */ + if (kfilm_convert->num_components >= 4) { + if (kfilm_convert->pass_combined != PASS_UNUSED) { + float scale, scale_exposure; + film_get_scale_and_scale_exposure(kfilm_convert, buffer, &scale, &scale_exposure); + + ccl_global const float *in_combined = buffer + kfilm_convert->pass_combined; + const float alpha = in_combined[3] * scale; + pixel[3] = film_transparency_to_alpha(alpha); + } + else { + pixel[3] = 1.0f; + } + } } /* -------------------------------------------------------------------- |