Cycles: Added Cryptomatte output.

This allows for extra output passes that encode automatic object and material masks
for the entire scene. It is an implementation of the Cryptomatte standard as
introduced by Psyop. A good future extension would be to add a manifest to the
export and to do plenty of testing to ensure that it is fully compatible with other
renderers and compositing programs that use Cryptomatte.

Internally, it adds the ability for Cycles to have several passes of the same type
that are distinguished by their name.

Differential Revision: https://developer.blender.org/D3538

1 files changed, 14 insertions, 1 deletions

diff --git a/intern/cycles/device/device_cpu.cpp b/intern/cycles/device/device_cpu.cpp
index 7eb73dea3ef..eb816e1fdd0 100644
--- a/intern/cycles/device/device_cpu.cpp
+++ b/intern/cycles/device/device_cpu.cpp
@@ -41,6 +41,7 @@
 #include "kernel/osl/osl_globals.h"
 
 #include "render/buffers.h"
+#include "render/coverage.h"
 
 #include "util/util_debug.h"
 #include "util/util_foreach.h"
@@ -677,8 +678,15 @@ public:
 
 	void path_trace(DeviceTask &task, RenderTile &tile, KernelGlobals *kg)
 	{
+		const bool use_coverage = kernel_data.film.cryptomatte_passes & CRYPT_ACCURATE;
+
 		scoped_timer timer(&tile.buffers->render_time);
 
+		Coverage coverage(kg, tile);
+		if(use_coverage) {
+			coverage.init_path_trace();
+		}
+
 		float *render_buffer = (float*)tile.buffer;
 		int start_sample = tile.start_sample;
 		int end_sample = tile.start_sample + tile.num_samples;
@@ -691,6 +699,9 @@ public:
 
 			for(int y = tile.y; y < tile.y + tile.h; y++) {
 				for(int x = tile.x; x < tile.x + tile.w; x++) {
+					if(use_coverage) {
+						coverage.init_pixel(x, y);
+					}
 					path_trace_kernel()(kg, render_buffer,
 					                    sample, x, y, tile.offset, tile.stride);
 				}
@@ -700,6 +711,9 @@ public:
 
 			task.update_progress(&tile, tile.w*tile.h);
 		}
+		if(use_coverage) {
+			coverage.finalize();
+		}
 	}
 
 	void denoise(DenoisingTask& denoising, RenderTile &tile)
@@ -760,7 +774,6 @@ public:
 			}
 			else if(tile.task == RenderTile::DENOISE) {
 				denoise(denoising, tile);
-
 				task.update_progress(&tile, tile.w*tile.h);
 			}