Initial commit

2020-05-12 08:52:44 +02:00
commit 144a85b3be
11 changed files with 309 additions and 0 deletions
@@ -0,0 +1,55 @@
+#ifndef JPEGIMAGE_H
+#define JPEGIMAGE_H
+
+#include <stdio.h> // jpeglib issue
+#include <jpeglib.h>
+#include <string>
+#include <vector>
+
+
+namespace Image {
+
+class JpegImage
+{
+public:
+	JpegImage();
+
+	void SetImageData(const std::string& data);
+
+	unsigned int Width() const;
+	unsigned int Height() const;
+	unsigned int StrideX() const;
+	unsigned int StrideY() const;
+	const std::vector<char>& Data() const;
+
+private:
+	struct SourceMgr
+	{
+		struct jpeg_source_mgr pub;
+		const JOCTET *data;
+		size_t len;
+	};
+	typedef SourceMgr* SourceMgrPtr;
+
+private:
+	static void InitSource(j_decompress_ptr pCinfo);
+	static boolean FillInputBuffer(j_decompress_ptr pCinfo);
+	static void SkipInputData(j_decompress_ptr pCinfo, long numBytes);
+	static void TermSource(j_decompress_ptr pCinfo);
+
+	void SetSourceMgr(j_decompress_ptr pCinfo, const char* pData, size_t len) const;
+
+	void DecompressImage(const char* pData, size_t len);
+
+private:
+	unsigned int m_width;
+	unsigned int m_height;
+	unsigned int m_strideX;
+	unsigned int m_strideY;
+
+	std::vector<char> m_data;
+};
+
+} // namespace Image
+
+#endif // JPEGIMAGE_H