JPGファイルをPDFファイルへ変換する(C++)
JPGファイルをPDFファイルへ変換する事のできるC++のソースコードです。関数になっていますのでそのまま使用できます
ソースコード
10年以上前に作成した古いコードで私すら覚えていないのですが、何かのお役に立てると嬉しいです。
#include <stdio.h>
#include <malloc.h>
#include <string.h>
typedef int BOOL;
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned long DWORD;
#define FALSE 0
#define TRUE 1
WORD SwapEndian(WORD S);
DWORD GetFileSize(FILE *fp);
BOOL CopyStream(FILE *Src,FILE *Dest);
BOOL GetJPEGSize(FILE *JPGStream,WORD *AWidth,WORD *AHeight,BOOL *CMYK);
void Write_CrossReferenceTable(FILE *AStream,DWORD ObjectPosArray[],int Count);
void Write_ContentsObject(FILE *AStream,DWORD ObjectPosArray[],int *ObjectIndex,int w,int h);
int JPGtoPDF(const char *OpenName,const char *SaveName);
int main(int argc,char *argv[])
{
if (argc >= 2)
return (JPGtoPDF(argv[1],"c:\\jpg2pdf.pdf"));
else
{
printf("Not Found!\n");
return(0);
}
}
WORD SwapEndian(WORD S)
{
return ((S & 0x00FF) << 8) | ((S & 0xFF00) >> 8) ;
}
DWORD GetFileSize(FILE *fp)
{
int Pos;
DWORD Size;
Pos =ftell(fp);
fseek(fp, 0, SEEK_END );
Size = ftell(fp);
fseek(fp, Pos, SEEK_SET );
return Size;
}
BOOL CopyStream(FILE *Src,FILE *Dest)
{
BYTE *buffer;
int Pos;
DWORD FileSize;
Pos =ftell(Src);
FileSize=GetFileSize(Src);
buffer=(BYTE *)malloc(FileSize);
if (buffer==NULL)
return FALSE;
fseek(Src,0,SEEK_SET);
fread(buffer,1,FileSize,Src);
fwrite(buffer,1,FileSize,Dest);
free(buffer);
fseek(Src,Pos,SEEK_SET);
return TRUE;
}
BOOL GetJPEGSize(FILE *JPGStream,WORD *AWidth,WORD *AHeight,BOOL *CMYK)
{
WORD wrk;
BYTE Sampling;
WORD SOF0 =0xFFC0; /* Normal */
WORD SOF2 =0xFFC2; /* Progressive */
/* JFIF */
if (fread(&wrk,2,1,JPGStream)<1)
return FALSE;
if (SwapEndian(wrk)!=0xFFD8)
return FALSE;
while (1)
{
if (fread(&wrk,2,1,JPGStream)<1)
return FALSE;
wrk=SwapEndian(wrk);
/* JPEG Maker */
if ((wrk==SOF0) | (wrk==SOF2))
{
/* Skip Segment Length */
if (fseek(JPGStream,ftell(JPGStream)+2,SEEK_SET))
return FALSE;
/* Skip Sample */
if (fseek(JPGStream,ftell(JPGStream)+1,SEEK_SET))
return FALSE;
/* Height */
if (fread(&wrk,2,1,JPGStream)<1)
return FALSE;
*AHeight=SwapEndian(wrk);
/* Width */
if (fread(&wrk,2,1,JPGStream)<1)
return FALSE;
*AWidth=SwapEndian(wrk);
/* ColorMode */
if (fread(&Sampling,1,1,JPGStream)<1)
return FALSE;
switch (Sampling)
{
case 3 : *CMYK = FALSE; break; /* RGB */
case 4 : *CMYK = TRUE ; break; /* CMYK */
default : return FALSE; /* ??? */
}
return TRUE;
}
else if ((wrk==0xFFFF) | (wrk==0xFFD9))
{
return FALSE;
}
/* Skip Segment */
if (fread(&wrk,2,1,JPGStream)<1)
return FALSE;
if (fseek(JPGStream,ftell(JPGStream)+SwapEndian(wrk)-2,SEEK_SET ))
return FALSE;
}
}
void Write_CrossReferenceTable(FILE *AStream,DWORD ObjectPosArray[],int Count)
{
int i;
fprintf(AStream,"xref\n");
fprintf(AStream,"0 %d\n",Count+1);
fprintf(AStream,"0000000000 65535 f \n");
for (i= 0; i<=Count-1;i++)
fprintf(AStream,"%0.10d 00000 n \n",ObjectPosArray[i]);
}
void Write_ContentsObject(FILE *AStream,DWORD ObjectPosArray[],int *ObjectIndex,int w,int h)
{
int Length;
/* Contents */
ObjectPosArray[*ObjectIndex] =(DWORD)ftell(AStream);
fprintf(AStream,"%d 0 obj\n",*ObjectIndex+1);
fprintf(AStream,"<< /Length %d 0 R >>\n",*ObjectIndex+2);
fprintf(AStream,"stream\n");
/* stream */
Length=ftell(AStream);
fprintf(AStream,"q\n");
fprintf(AStream,"%d 0 0 %d 0 0 cm\n",w,h);
fprintf(AStream,"/Im0 Do\n");
fprintf(AStream,"Q\n");
Length=ftell(AStream)-Length;
fprintf(AStream,"endstream\n");
fprintf(AStream,"endobj\n");
*ObjectIndex=*ObjectIndex+1;
/* stream Length */
ObjectPosArray[*ObjectIndex] =(DWORD)ftell(AStream);
fprintf(AStream,"%d 0 obj\n",*ObjectIndex+1);
fprintf(AStream,"%d\n",Length);
fprintf(AStream,"endobj\n");
*ObjectIndex=*ObjectIndex+1;
}
int JPGtoPDF(const char *OpenName,const char *SaveName)
{
BOOL cmyk;
WORD w,h;
int ObjectIndex;
DWORD ObjectPosArray[10];
FILE *JPGStream,*AStream;
ObjectIndex=0;
/* Open Jpeg File */
JPGStream=fopen(OpenName,"rb");
if(JPGStream==NULL)
{
printf("Error : Can not Open File.\n");
return(-1);
}
/* Get JPEG size */
if (GetJPEGSize(JPGStream,&w,&h,&cmyk)==FALSE)
{
printf("Error : Can not get JPEG size.\n");
return(-1);
}
/* Create PDF File */
AStream=fopen(SaveName,"wb+");
if(AStream==NULL)
{
printf("Error : Can not Create File.\n");
fclose(JPGStream);
return(-1);
}
/* ------------------------------------------------------------- */
/* Writting PDF */
/* ------------------------------------------------------------- */
/* PDF version */
fprintf(AStream,"%%PDF-1.2\n");
/* Catalog */
ObjectPosArray[ObjectIndex] =ftell(AStream);
fprintf(AStream,"%d 0 obj\n",ObjectIndex+1);
fprintf(AStream,"<<\n");
fprintf(AStream,"/Type /Catalog\n");
fprintf(AStream,"/Pages 2 0 R\n");
/* View Option (100%) */
/*fprintf(AStream,"/OpenAction [3 0 R /XYZ -32768 -32768 1 ]\n"); */
fprintf(AStream,">>\n");
fprintf(AStream,"endobj\n");
ObjectIndex++;
/* Parent Pages */
ObjectPosArray[ObjectIndex] =ftell(AStream);
fprintf(AStream,"%d 0 obj\n",ObjectIndex+1);
fprintf(AStream,"<<\n");
fprintf(AStream,"/Type /Pages\n");
fprintf(AStream,"/Kids [ 3 0 R ]\n");
fprintf(AStream,"/Count 1\n");
fprintf(AStream,">>\n");
fprintf(AStream,"endobj\n");
ObjectIndex++;
/* Kids Page */
ObjectPosArray[ObjectIndex] =ftell(AStream);
fprintf(AStream,"%d 0 obj\n",ObjectIndex+1);
fprintf(AStream,"<<\n");
fprintf(AStream,"/Type /Page\n");
fprintf(AStream,"/Parent 2 0 R\n");
fprintf(AStream,"/Resources\n");
fprintf(AStream,"<<\n");
fprintf(AStream,"/XObject << /Im0 4 0 R >>\n");
fprintf(AStream,"/ProcSet [ /PDF /ImageC ]\n");
fprintf(AStream,">>\n");
fprintf(AStream,"/MediaBox [ 0 0 %d %d ]\n",w,h);
fprintf(AStream,"/Contents 5 0 R\n");
fprintf(AStream,">>\n");
fprintf(AStream,"endobj\n");
ObjectIndex++;
/* XObject Resource */
ObjectPosArray[ObjectIndex] =ftell(AStream);
fprintf(AStream,"%d 0 obj\n",ObjectIndex+1);
fprintf(AStream,"<<\n");
fprintf(AStream,"/Type /XObject\n");
fprintf(AStream,"/Subtype /Image\n");
fprintf(AStream,"/Name /Im0\n");
fprintf(AStream,"/Width %d\n",w);
fprintf(AStream,"/Height %d\n",h);
fprintf(AStream,"/BitsPerComponent 8\n");
fprintf(AStream,"/Filter [/DCTDecode]\n");
if (cmyk==FALSE)
fprintf(AStream,"/ColorSpace /DeviceRGB\n");
else
{
fprintf(AStream,"/ColorSpace /DeviceCMYK\n");
fprintf(AStream,"/Decode[1 0 1 0 1 0 1 0]\n"); /* Photoshop CMYK (NOT BIT) */
}
fprintf(AStream,"/Length %d >>\n",GetFileSize(JPGStream));
fprintf(AStream,"stream\n");
if (CopyStream(JPGStream,AStream)==FALSE)
{
printf("Error : No Memory \n");
return(-1);
}
fprintf(AStream,"endstream\n");
fprintf(AStream,"endobj\n");
ObjectIndex++;
/* Contents Stream & Object */
Write_ContentsObject(AStream,ObjectPosArray,&ObjectIndex,w,h);
/* CrossReferenceTable */
ObjectPosArray[ObjectIndex] =ftell(AStream);
Write_CrossReferenceTable(AStream,ObjectPosArray,(int)ObjectIndex);
/* trailer */
fprintf(AStream,"trailer\n");
fprintf(AStream,"<<\n");
fprintf(AStream,"/Size %d\n",ObjectIndex+1);
fprintf(AStream,"/Root 1 0 R\n");
fprintf(AStream,">>\n");
fprintf(AStream,"startxref\n");
fprintf(AStream,"%d\n",ObjectPosArray[ObjectIndex]);
fprintf(AStream,"%%%%EOF\n");
fclose(JPGStream); fclose(AStream);
printf("\nSuccess!\n");
return (0);
}
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公開日：2015年01月08日 最終更新日：2015年02月18日
記事NO：00091
