1 files changed, 59 insertions, 0 deletions
diff --git a/intern/cycles/kernel/split/kernel_sum_all_radiance.h b/intern/cycles/kernel/split/kernel_sum_all_radiance.h
new file mode 100644
index 00000000000..a21e9b6a0b1
--- /dev/null
+++ b/intern/cycles/kernel/split/kernel_sum_all_radiance.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2011-2015 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.
+ */
+
+#include "../kernel_compat_opencl.h"
+#include "../kernel_math.h"
+#include "../kernel_types.h"
+#include "../kernel_globals.h"
+
+/* Since we process various samples in parallel; The output radiance of different samples
+ * are stored in different locations; This kernel combines the output radiance contributed
+ * by all different samples and stores them in the RenderTile's output buffer.
+ */
+ccl_device void kernel_sum_all_radiance(
+        ccl_constant KernelData *data,               /* To get pass_stride to offet into buffer */
+        ccl_global float *buffer,                    /* Output buffer of RenderTile */
+        ccl_global float *per_sample_output_buffer,  /* Radiance contributed by all samples */
+        int parallel_samples, int sw, int sh, int stride,
+        int buffer_offset_x,
+        int buffer_offset_y,
+        int buffer_stride,
+        int start_sample)
+{
+	int x = get_global_id(0);
+	int y = get_global_id(1);
+
+	if(x < sw && y < sh) {
+		buffer += ((buffer_offset_x + x) + (buffer_offset_y + y) * buffer_stride) * (data->film.pass_stride);
+		per_sample_output_buffer += ((x + y * stride) * parallel_samples) * (data->film.pass_stride);
+
+		int sample_stride = (data->film.pass_stride);
+
+		int sample_iterator = 0;
+		int pass_stride_iterator = 0;
+		int num_floats = data->film.pass_stride;
+
+		for(sample_iterator = 0; sample_iterator < parallel_samples; sample_iterator++) {
+			for(pass_stride_iterator = 0; pass_stride_iterator < num_floats; pass_stride_iterator++) {
+				*(buffer + pass_stride_iterator) =
+				        (start_sample == 0 && sample_iterator == 0)
+				                ? *(per_sample_output_buffer + pass_stride_iterator)
+				                : *(buffer + pass_stride_iterator) + *(per_sample_output_buffer + pass_stride_iterator);
+			}
+			per_sample_output_buffer += sample_stride;
+		}
+	}
+}