Cycles: remove prefix from source code file names

Remove prefix of filenames that is the same as the folder name. This used
to help when #includes were using individual files, but now they are always
relative to the cycles root directory and so the prefixes are redundant.

For patches and branches, git merge and rebase should be able to detect the
renames and move over code to the right file.

1 files changed, 75 insertions, 0 deletions

diff --git a/intern/cycles/util/math_cdf.h b/intern/cycles/util/math_cdf.h
new file mode 100644
index 00000000000..4c57dac4bbe
--- /dev/null
+++ b/intern/cycles/util/math_cdf.h
@@ -0,0 +1,75 @@
+/*
+ * 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.
+ */
+
+#ifndef __UTIL_MATH_CDF_H__
+#define __UTIL_MATH_CDF_H__
+
+#include "util/algorithm.h"
+#include "util/math.h"
+#include "util/vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Evaluate CDF of a given functor with given range and resolution. */
+template<typename Functor>
+void util_cdf_evaluate(
+    const int resolution, const float from, const float to, Functor functor, vector<float> &cdf)
+{
+  const int cdf_count = resolution + 1;
+  const float range = to - from;
+  cdf.resize(cdf_count);
+  cdf[0] = 0.0f;
+  /* Actual CDF evaluation. */
+  for (int i = 0; i < resolution; ++i) {
+    float x = from + range * (float)i / (resolution - 1);
+    float y = functor(x);
+    cdf[i + 1] = cdf[i] + fabsf(y);
+  }
+  /* Normalize the CDF. */
+  for (int i = 0; i <= resolution; i++) {
+    cdf[i] /= cdf[resolution];
+  }
+}
+
+/* Invert pre-calculated CDF function. */
+void util_cdf_invert(const int resolution,
+                     const float from,
+                     const float to,
+                     const vector<float> &cdf,
+                     const bool make_symmetric,
+                     vector<float> &inv_cdf);
+
+/* Evaluate inverted CDF of a given functor with given range and resolution. */
+template<typename Functor>
+void util_cdf_inverted(const int resolution,
+                       const float from,
+                       const float to,
+                       Functor functor,
+                       const bool make_symmetric,
+                       vector<float> &inv_cdf)
+{
+  vector<float> cdf;
+  /* There is no much smartness going around lower resolution for the CDF table,
+   * this just to match the old code from pixel filter so it all stays exactly
+   * the same and no regression tests are failed.
+   */
+  util_cdf_evaluate(resolution - 1, from, to, functor, cdf);
+  util_cdf_invert(resolution, from, to, cdf, make_symmetric, inv_cdf);
+}
+
+CCL_NAMESPACE_END
+
+#endif /* __UTIL_MATH_H_CDF__ */