PlotterHMI/machine/bmp/bwbmp.h

#ifndef BWBMP_H
#define BWBMP_H

#include <QString>
#include <QFileInfo>
#include "machine/comm/protocol.h"

#pragma pack(1)     //设定为1字节对齐

// 位图的调色板
typedef struct
{
    unsigned char rgbBlue;
    unsigned char rgbGreen;
    unsigned char rgbRed;
    unsigned char rgbReserved;
}__attribute__ ((packed)) BmpRgbQuad;

// 位图文件头
typedef struct
{
    unsigned short int  identifier;     // 类型 一般为 "BM"
    unsigned long  int  fileSize;       // 文件大小
    unsigned long  int  reserved;       // 保留
    unsigned long  int  bitDatOffset;   // 位图数据偏移，一般为 0x3E

    unsigned long  int  biSize;         // 位图信息头大小, 一般为 0x28
    unsigned long  int  biWidth;        // 位图宽度,以像素为单位
    unsigned long  int  biHeight;       // 位图高度,以像素为单位
    unsigned short int  biPlanes;       // 位图的位面数，必须为1
    unsigned short int  biBitPerPixel;  // 每个像素的位数, =1, 单色位图; =4, 16色; = 8, 256色; = 24 真彩色
    unsigned long  int  biCompression;  // 位图压缩类型, =0, 不压缩（BI_RGB）; =1, BI_RLE8; = 2, BI_RLE4; = 3 BI_BITFIELDS; = 4, BI_JPEG; = 5, BI_PNG
    unsigned long  int  biBitmapDatSize;// 位图数据区的大小（字节数）, 必须是4的整数倍
    unsigned long  int  biHResolution;  // 水平分辨率, 像素/米
    unsigned long  int  biVResolution;  // 垂直分辨率, 像素/米
    unsigned long  int  biColors;       // 颜色数
    unsigned long  int  biImpColors;    // 重要颜色数
    BmpRgbQuad          palette[2];     // 调色板
}__attribute__ ((packed)) BitmapHead;


class BWBmp
{
public:
    BWBmp();

public:
    int LoadBiBmp(QString filename);
    int SavePrBmp(QString filename);
    int Compress(int idx = 0, int dir = 1,  int segWidth = 300,  int segHeight = 50);
    QByteArray getPrBmpDat();

    /*
    int CompressSeg(const unsigned char * pBitDatBeg,
                    unsigned int width, unsigned int height,
                    unsigned int segWidth, unsigned int segHeight, unsigned char fill,
                    int compDir,
                    QByteArray & prDat);
    int UnpressSeg(const unsigned char * pBitDatBeg,
                   unsigned int width, unsigned int height,
                   unsigned int segWidth, unsigned int segHeight, unsigned char fill,
                   int compDir,
                   QByteArray & prDat);

*/

private:

    QByteArray m_bwDdat;        // 单色BMP
    QByteArray m_prDdat;

    QByteArray m_rbwDdat;
    QString m_fileName;
};

#endif // BWBMP_H