Introduced lmscore lib to centralize services, migrated cover service

2021-10-16 15:22:59 +02:00
parent 0dcef2e94c
commit 32a944e3d4
26 changed files with 149 additions and 106 deletions
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2020 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "JPEGImage.hpp"
+
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include <stb/stb_image_write.h>
+
+#include "image/Exception.hpp"
+#include "RawImage.hpp"
+
+namespace Image::STB
+{
+	JPEGImage::JPEGImage(const RawImage& rawImage, unsigned quality)
+	{
+		auto writeCb {[](void* ctx, void* writeData, int writeSize)
+		{
+			auto& output {*reinterpret_cast<std::vector<std::byte>*>(ctx)};
+			const std::size_t currentOutputSize {output.size()};
+			output.resize(currentOutputSize + writeSize);
+			std::copy(reinterpret_cast<const std::byte*>(writeData), reinterpret_cast<const std::byte*>(writeData) + writeSize, output.data() + currentOutputSize);
+		}};
+
+		if (stbi_write_jpg_to_func(writeCb, &_data, rawImage.getWidth(), rawImage.getHeight(), 3, rawImage.getData(), quality) == 0)
+		{
+			_data.clear();
+			throw ImageException {"Failed to export in jpeg format!"};
+		}
+	}
+
+	const std::byte*
+	JPEGImage::getData() const
+	{
+		if (_data.empty())
+				return nullptr;
+
+		return &_data.front();
+	}
+
+	std::size_t
+	JPEGImage::getDataSize() const
+	{
+		return _data.size();
+	}
+}