1 files changed, 95 insertions, 0 deletions
diff --git a/archive/hge/CxImage/ximapng.h b/archive/hge/CxImage/ximapng.h
new file mode 100644
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+++ b/archive/hge/CxImage/ximapng.h
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+/*
+ * File:	ximapng.h
+ * Purpose:	PNG Image Class Loader and Writer
+ */
+/* ==========================================================
+ * CxImagePNG (c) 07/Aug/2001 Davide Pizzolato - www.xdp.it
+ * For conditions of distribution and use, see copyright notice in ximage.h
+ *
+ * Special thanks to Troels Knakkergaard for new features, enhancements and bugfixes
+ *
+ * original CImagePNG  and CImageIterator implementation are:
+ * Copyright:	(c) 1995, Alejandro Aguilar Sierra <asierra(at)servidor(dot)unam(dot)mx>
+ *
+ * libpng Copyright (c) 1998-2003 Glenn Randers-Pehrson
+ * ==========================================================
+ */
+#if !defined(__ximaPNG_h)
+#define __ximaPNG_h
+
+#include "ximage.h"
+
+#if CXIMAGE_SUPPORT_PNG
+
+extern "C" {
+#ifdef _LINUX
+ #undef _DLL
+ #include <png.h>
+#else
+ #include "../png/png.h"
+#endif
+}
+
+class CxImagePNG: public CxImage
+{
+public:
+	CxImagePNG(): CxImage(CXIMAGE_FORMAT_PNG) {}
+
+//	bool Load(const TCHAR * imageFileName){ return CxImage::Load(imageFileName,CXIMAGE_FORMAT_PNG);}
+//	bool Save(const TCHAR * imageFileName){ return CxImage::Save(imageFileName,CXIMAGE_FORMAT_PNG);}
+	bool Decode(CxFile * hFile);
+	bool Decode(FILE *hFile) { CxIOFile file(hFile); return Decode(&file); }
+
+#if CXIMAGE_SUPPORT_ENCODE
+	bool Encode(CxFile * hFile);
+	bool Encode(FILE *hFile) { CxIOFile file(hFile); return Encode(&file); }
+#endif // CXIMAGE_SUPPORT_ENCODE
+
+	enum CODEC_OPTION
+	{
+		ENCODE_INTERLACE = 0x01,
+		// Exclusive compression types : 3 bit wide field
+		ENCODE_COMPRESSION_MASK = 0x0E,
+		ENCODE_NO_COMPRESSION =      1 << 1,
+		ENCODE_BEST_SPEED =          2 << 1,
+		ENCODE_BEST_COMPRESSION =    3 << 1,
+		ENCODE_DEFAULT_COMPRESSION = 4 << 1
+	};
+
+protected:
+	void ima_png_error(png_struct *png_ptr, char *message);
+	void expand2to4bpp(uint8_t* prow);
+
+	static void PNGAPI user_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
+	{
+		CxFile* hFile = (CxFile*)png_get_io_ptr(png_ptr);
+		if (hFile == NULL || hFile->Read(data,1,length) != length) png_error(png_ptr, "Read Error");
+	}
+
+	static void PNGAPI user_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
+	{
+		CxFile* hFile = (CxFile*)png_get_io_ptr(png_ptr);
+		if (hFile == NULL || hFile->Write(data,1,length) != length) png_error(png_ptr, "Write Error");
+	}
+
+	static void PNGAPI user_flush_data(png_structp png_ptr)
+	{
+		CxFile* hFile = (CxFile*)png_get_io_ptr(png_ptr);
+		if (hFile == NULL || !hFile->Flush()) png_error(png_ptr, "Flush Error");
+	}
+
+    static void PNGAPI user_error_fn(png_structp png_ptr,png_const_charp error_msg)
+	{
+#if PNG_LIBPNG_VER > 10399
+		strncpy((char*)png_get_error_ptr(png_ptr),error_msg,255);
+		longjmp(png_jmpbuf(png_ptr), 1);
+#else
+		strncpy((char*)png_ptr->error_ptr,error_msg,255);
+		longjmp(png_ptr->jmpbuf, 1);
+#endif
+	}
+};
+
+#endif
+
+#endif