diff options
Diffstat (limited to 'intern/cycles/kernel/kernel_id_passes.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_id_passes.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/intern/cycles/kernel/kernel_id_passes.h b/intern/cycles/kernel/kernel_id_passes.h new file mode 100644 index 00000000000..ee3b8b8abfb --- /dev/null +++ b/intern/cycles/kernel/kernel_id_passes.h @@ -0,0 +1,94 @@ +/* +* Copyright 2018 Blender Foundation +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + +CCL_NAMESPACE_BEGIN + +ccl_device_inline void kernel_write_id_slots(ccl_global float *buffer, int num_slots, float id, float weight) +{ + kernel_assert(id != ID_NONE); + if(weight == 0.0f) { + return; + } + + for(int slot = 0; slot < num_slots; slot++) { + ccl_global float2 *id_buffer = (ccl_global float2*)buffer; +#ifdef __ATOMIC_PASS_WRITE__ + /* If the loop reaches an empty slot, the ID isn't in any slot yet - so add it! */ + if(id_buffer[slot].x == ID_NONE) { + /* Use an atomic to claim this slot. + * If a different thread got here first, try again from this slot on. */ + float old_id = atomic_compare_and_swap_float(buffer+slot*2, ID_NONE, id); + if(old_id != ID_NONE && old_id != id) { + continue; + } + atomic_add_and_fetch_float(buffer+slot*2+1, weight); + break; + } + /* If there already is a slot for that ID, add the weight. + * If no slot was found, add it to the last. */ + else if(id_buffer[slot].x == id || slot == num_slots - 1) { + atomic_add_and_fetch_float(buffer+slot*2+1, weight); + break; + } +#else /* __ATOMIC_PASS_WRITE__ */ + /* If the loop reaches an empty slot, the ID isn't in any slot yet - so add it! */ + if(id_buffer[slot].x == ID_NONE) { + id_buffer[slot].x = id; + id_buffer[slot].y = weight; + break; + } + /* If there already is a slot for that ID, add the weight. + * If no slot was found, add it to the last. */ + else if(id_buffer[slot].x == id || slot == num_slots - 1) { + id_buffer[slot].y += weight; + break; + } +#endif /* __ATOMIC_PASS_WRITE__ */ + } +} + +ccl_device_inline void kernel_sort_id_slots(ccl_global float *buffer, int num_slots) +{ + ccl_global float2 *id_buffer = (ccl_global float2*)buffer; + for(int slot = 1; slot < num_slots; ++slot) { + if(id_buffer[slot].x == ID_NONE) { + return; + } + /* Since we're dealing with a tiny number of elements, insertion sort should be fine. */ + int i = slot; + while(i > 0 && id_buffer[i].y > id_buffer[i - 1].y) { + float2 swap = id_buffer[i]; + id_buffer[i] = id_buffer[i - 1]; + id_buffer[i - 1] = swap; + --i; + } + } +} + +#ifdef __KERNEL_GPU__ +/* post-sorting for Cryptomatte */ +ccl_device void kernel_cryptomatte_post(KernelGlobals *kg, ccl_global float *buffer, uint sample, int x, int y, int offset, int stride) +{ + if(sample - 1 == kernel_data.integrator.aa_samples) { + int index = offset + x + y * stride; + int pass_stride = kernel_data.film.pass_stride; + ccl_global float *cryptomatte_buffer = buffer + index * pass_stride + kernel_data.film.pass_cryptomatte; + kernel_sort_id_slots(cryptomatte_buffer, 2 * kernel_data.film.cryptomatte_depth); + } +} +#endif + +CCL_NAMESPACE_END |