glplanet, an OpenGL-based planetary rendererHEADmain

glplanet draws Earth like it currently appears from space, putting
nighttime areas in shadow and daytime areas in light. It’s modeled
after Xplanet (http://xplanet.sourceforge.net/), but whereas Xplanet is
entirely a CPU-resident program, glplanet draws using OpenGL. It’s thus
much less resource-intensive, particularly when using high-resolution
textures.

1 files changed, 81 insertions, 0 deletions

diff --git a/gen/resources_header b/gen/resources_header
new file mode 100755
index 0000000..e6d6b8d
--- /dev/null
+++ b/gen/resources_header
@@ -0,0 +1,81 @@
+#!/bin/bash
+# Copyright 2021 Benjamin Barenblat
+#
+# 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
+#
+#     https://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.
+
+set -eu -o pipefail
+
+res=()
+for f in "$@"; do
+	f="${f//./_}"
+	res+=("${f//\//_}")
+done
+
+cat <<EOF
+// This file was generated by gen/resources_header. Edit that script instead.
+#ifndef GLPLANET_RES_RES_H_
+#define GLPLANET_RES_RES_H_
+
+#include <stdint.h>
+
+#include "third_party/abseil/absl/strings/string_view.h"
+#include "third_party/abseil/absl/types/span.h"
+
+extern "C" {
+
+EOF
+
+for symbol in "${res[@]}"; do
+	echo "extern const char _binary_${symbol}_start;"
+	echo "extern const char _binary_${symbol}_end;"
+	echo
+done
+
+cat <<EOF
+}  // extern "C"
+
+namespace glplanet_resources {
+
+EOF
+
+for symbol in "${res[@]}"; do
+	IFS=_ read -r -a parts <<<"$symbol"
+	unset parts[0]
+	function_name=
+	for part in "${parts[@]}"; do
+		function_name+="${part^}"
+	done
+
+	case $symbol in
+	*_webp)
+		echo "inline absl::Span<const uint8_t> $function_name() {"
+		echo '  return absl::MakeConstSpan('
+		echo "      reinterpret_cast<const uint8_t*>(&_binary_${symbol}_start),"
+		echo "      reinterpret_cast<const uint8_t*>(&_binary_${symbol}_end));"
+		echo '}'
+		;;
+	*)
+		echo "inline absl::string_view $function_name() {"
+		echo "  return absl::string_view(&_binary_${symbol}_start,"
+		echo "                           &_binary_${symbol}_end);"
+		echo '}'
+		;;
+	esac
+	echo
+done
+
+cat <<EOF
+}  // namespace glplanet_resources
+
+#endif  // GLPLANET_RES_RES_H_
+EOF