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An ASP Thumbnail Solution

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19 Nov 2009CPOL6 min read 441.5K   8.1K   100  
ASP pages and free COM objects for generation of thumbnails and thumbnail views.
/*
 * File:	ximatga.h
 * Purpose:	TARGA Image Class Loader and Writer
 */
/* === C R E D I T S  &  D I S C L A I M E R S ==============
 * CxImageTGA (c) 05/Jan/2002 <ing.davide.pizzolato@libero.it>
 * Permission is given by the author to freely redistribute and include
 * this code in any program as long as this credit is given where due.
 *
 * CxImage version 5.00 23/Aug/2002
 * See the file history.htm for the complete bugfix and news report.
 *
 * Parts of the code come from Paintlib
 * Copyright (c) 1996-1998 Ulrich von Zadow
 *
 * COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
 * THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
 * CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
 * THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
 * SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
 * PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.
 *
 * Use at your own risk!
 * ==========================================================
 */
#if !defined(__ximaTGA_h)
#define __ximaTGA_h

#include "ximage.h"

#if CXIMAGE_SUPPORT_TGA

class CxImageTGA: public CxImage
{
#pragma pack(1)
typedef struct tagTgaHeader
{
    BYTE   IdLength;            // Image ID Field Length
    BYTE   CmapType;            // Color Map Type
    BYTE   ImageType;           // Image Type

    WORD   CmapIndex;           // First Entry Index
    WORD   CmapLength;          // Color Map Length
    BYTE   CmapEntrySize;       // Color Map Entry Size

    WORD   X_Origin;            // X-origin of Image
    WORD   Y_Origin;            // Y-origin of Image
    WORD   ImageWidth;          // Image Width
    WORD   ImageHeight;         // Image Height
    BYTE   PixelDepth;          // Pixel Depth
    BYTE   ImagDesc;            // Image Descriptor
} TGAHEADER;
#pragma pack()

public:
	CxImageTGA(): CxImage(CXIMAGE_FORMAT_TGA) {}

//	bool Load(const char * imageFileName){ return CxImage::Load(imageFileName,CXIMAGE_FORMAT_TGA);}
//	bool Save(const char * imageFileName){ return CxImage::Save(imageFileName,CXIMAGE_FORMAT_TGA);}
	bool Decode(CxFile * hFile);
	bool Encode(CxFile * hFile);

	bool Decode(FILE *hFile) { CxIOFile file(hFile); return Decode(&file); }
	bool Encode(FILE *hFile) { CxIOFile file(hFile); return Encode(&file); }
protected:
	void ExpandCompressedLine(BYTE* pDest,TGAHEADER* ptgaHead,CxFile *hFile,int width, int y);
	void ExpandUncompressedLine(BYTE* pDest,TGAHEADER* ptgaHead,CxFile *hFile,int width, int y, int xoffset);
};

#endif

#endif

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Web Developer Forthnet
Greece Greece
Software developer and Microsoft Trainer, Athens, Greece (MCT, MCSD.net, MCSE 2003, MCDBA 2000,MCTS, MCITP, MCIPD).

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