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2025-09-04 10:54:47 +08:00
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+/* Copyright (c) 2024-2025, Sascha Willems
+ * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "shading_language_selection.h"
+
+#include <algorithm>
+
+#include "platform/application.h"
+
+namespace plugins
+{
+ShadingLanguageSelection::ShadingLanguageSelection() :
+    ShadingLanguageSelectionTags("Shading language selection",
+                                 "A collection of flags to select shader from different shading languages (glsl, hlsl or slang)",
+                                 {},
+                                 {},
+                                 {{"shading-language", "Shading language to use (glsl, hlsl or slang)"}})
+{
+}
+
+bool ShadingLanguageSelection::handle_option(std::deque<std::string> &arguments)
+{
+	assert(!arguments.empty() && (arguments[0].substr(0, 2) == "--"));
+	std::string option = arguments[0].substr(2);
+	if (option == "shading-language")
+	{
+		if (arguments.size() < 2)
+		{
+			LOGE("Option \"shading-language\" is missing the actual shading language to use!");
+			return false;
+		}
+
+		// Make sure it's one of the supported shading languages
+		std::string shading_language = arguments[1];
+		std::transform(shading_language.begin(), shading_language.end(), shading_language.begin(), ::tolower);
+		if (shading_language == "glsl")
+		{
+			LOGI("Shading language selection: GLSL");
+			vkb::Application::set_shading_language(vkb::ShadingLanguage::GLSL);
+		}
+		else if (shading_language == "hlsl")
+		{
+			LOGI("Shading language selection: HLSL")
+			vkb::Application::set_shading_language(vkb::ShadingLanguage::HLSL);
+		}
+		else if (shading_language == "slang")
+		{
+			LOGI("Shading language selection: slang")
+			vkb::Application::set_shading_language(vkb::ShadingLanguage::SLANG);
+		}
+		else
+		{
+			LOGE("Invalid shading language selection, defaulting to glsl");
+		}
+
+		arguments.pop_front();
+		arguments.pop_front();
+		return true;
+	}
+	return false;
+}
+}        // namespace plugins