1 files changed, 91 insertions, 0 deletions
diff --git a/intern/cycles/render/image_sky.cpp b/intern/cycles/render/image_sky.cpp
new file mode 100644
index 00000000000..442e1d7941f
--- /dev/null
+++ b/intern/cycles/render/image_sky.cpp
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2011-2020 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 "render/image_sky.h"
+
+#include "util/util_image.h"
+#include "util/util_logging.h"
+#include "util/util_path.h"
+#include "util/util_sky_model.h"
+#include "util/util_task.h"
+
+CCL_NAMESPACE_BEGIN
+
+SkyLoader::SkyLoader(
+    float sun_elevation, int altitude, float air_density, float dust_density, float ozone_density)
+    : sun_elevation(sun_elevation),
+      altitude(altitude),
+      air_density(air_density),
+      dust_density(dust_density),
+      ozone_density(ozone_density)
+{
+}
+
+SkyLoader::~SkyLoader(){};
+
+bool SkyLoader::load_metadata(ImageMetaData &metadata)
+{
+  metadata.width = 512;
+  metadata.height = 128;
+  metadata.channels = 3;
+  metadata.depth = 1;
+  metadata.type = IMAGE_DATA_TYPE_FLOAT4;
+  metadata.compress_as_srgb = false;
+  return true;
+}
+
+bool SkyLoader::load_pixels(const ImageMetaData &metadata,
+                            void *pixels,
+                            const size_t /*pixels_size*/,
+                            const bool /*associate_alpha*/)
+{
+  /* definitions */
+  int width = metadata.width;
+  int height = metadata.height;
+  float *pixel_data = (float *)pixels;
+  float altitude_f = (float)altitude;
+
+  /* precompute sky texture */
+  const int rows_per_task = divide_up(1024, width);
+  parallel_for(blocked_range<size_t>(0, height, rows_per_task),
+               [&](const blocked_range<size_t> &r) {
+                 nishita_skymodel_precompute_texture(pixel_data,
+                                                     metadata.channels,
+                                                     r.begin(),
+                                                     r.end(),
+                                                     width,
+                                                     height,
+                                                     sun_elevation,
+                                                     altitude_f,
+                                                     air_density,
+                                                     dust_density,
+                                                     ozone_density);
+               });
+
+  return true;
+}
+
+string SkyLoader::name() const
+{
+  return "sky_nishita";
+}
+
+bool SkyLoader::equals(const ImageLoader & /*other*/) const
+{
+  return false;
+}
+
+CCL_NAMESPACE_END