Cycles: Initial implementation of detailed statistics

Gathers information about object geometry and textures. Very basic at
this moment, but need to start somewhere.

Things which needs to be included still:

- "Runtime" information, like BVH. While it is not directly controllable
  by artists, it's still important to know.

- Device array sizes. Again, not under artists control, but is added to
  the overall size.

- Memory peak at different synchronization stages.

At this point it simply prints info to the stdout after F12 is done,
need better control over that too.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D3566

1 files changed, 119 insertions, 0 deletions

diff --git a/intern/cycles/render/stats.cpp b/intern/cycles/render/stats.cpp
new file mode 100644
index 00000000000..101d33fcf65
--- /dev/null
+++ b/intern/cycles/render/stats.cpp
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2011-2018 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.
+ */
+
+#include "render/stats.h"
+#include "util/util_algorithm.h"
+#include "util/util_foreach.h"
+#include "util/util_string.h"
+
+CCL_NAMESPACE_BEGIN
+
+static int kIndentNumSpaces = 2;
+
+/* Named size entry. */
+
+namespace {
+
+bool namedSizeEntryComparator(const NamedSizeEntry& a, const NamedSizeEntry& b)
+{
+	/* We sort in descending order. */
+	return a.size > b.size;
+}
+
+}  // namespace
+
+NamedSizeEntry::NamedSizeEntry()
+    : name(""),
+      size(0) {
+}
+
+NamedSizeEntry::NamedSizeEntry(const string& name, size_t size)
+    : name(name),
+      size(size) {
+}
+
+/* Named size statistics. */
+
+NamedSizeStats::NamedSizeStats()
+    : total_size(0) {
+}
+
+void NamedSizeStats::add_entry(const NamedSizeEntry& entry) {
+	total_size += entry.size;
+	entries.push_back(entry);
+}
+
+string NamedSizeStats::full_report(int indent_level)
+{
+	const string indent(indent_level * kIndentNumSpaces, ' ');
+	const string double_indent = indent + indent;
+	string result = "";
+	result += string_printf("%sTotal memory: %s (%s)\n",
+	                        indent.c_str(),
+	                        string_human_readable_size(total_size).c_str(),
+	                        string_human_readable_number(total_size).c_str());
+	sort(entries.begin(), entries.end(), namedSizeEntryComparator);
+	foreach(const NamedSizeEntry& entry, entries) {
+		result += string_printf(
+		        "%s%-32s %s (%s)\n",
+		        double_indent.c_str(),
+		        entry.name.c_str(),
+		        string_human_readable_size(entry.size).c_str(),
+		        string_human_readable_number(entry.size).c_str());
+	}
+	return result;
+}
+
+/* Mesh statistics. */
+
+MeshStats::MeshStats() {
+}
+
+string MeshStats::full_report(int indent_level)
+{
+	const string indent(indent_level * kIndentNumSpaces, ' ');
+	string result = "";
+	result += indent + "Geometry:\n" + geometry.full_report(indent_level + 1);
+	return result;
+}
+
+/* Image statistics. */
+
+ImageStats::ImageStats() {
+}
+
+string ImageStats::full_report(int indent_level)
+{
+	const string indent(indent_level * kIndentNumSpaces, ' ');
+	string result = "";
+	result += indent + "Textures:\n" + textures.full_report(indent_level + 1);
+	return result;
+}
+
+/* Overall statistics. */
+
+RenderStats::RenderStats() {
+}
+
+string RenderStats::full_report()
+{
+	string result = "";
+	result += "Mesh statistics:\n" + mesh.full_report(1);
+	result += "Image statistics:\n" + image.full_report(1);
+	return result;
+}
+
+CCL_NAMESPACE_END