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/***************************************************/
/* Unit GIF : contains procedure to write and load */
/* conpressed gif image. */
/* Use an ultra fast compression method */
/***************************************************/
#include <stdio.h>
#include "CImage.h"
#include "gif/gif.h"
#include "jpg/jpegdecoder.h"
#include "png/hpng.h"
// ------ Default constructor -----
CImage::CImage() {
strcpy(m_LastError,"No errors");
m_Width=0;
m_Height=0;
m_Data=NULL;
}
// ------ Load image -----
int CImage::LoadImage(char *FileName) {
Release();
// Get extensions
char *p = strrchr(FileName,'.');
char ext[12];
if( p==NULL ) {
sprintf(m_LastError,"Does not have extensions.");
return 0;
}
strcpy(ext,p+1);
if( strcasecmp(ext,"gif")!=0 &&
strcasecmp(ext,"jpg")!=0 &&
strcasecmp(ext,"jpeg")!=0 &&
strcasecmp(ext,"png")) {
sprintf(m_LastError,"Not gif,jpg or png.");
return 0;
}
// Load GIF image
if( strcasecmp(ext,"gif")==0 ) {
GIF_IMAGE img;
int Length;
strcpy(img.FileName,FileName);
if( !LoadGifImage(&img) ) {
strcpy(m_LastError,GifErrorMessage);
return 0;
}
m_Width=img.width;
m_Height=img.height;
Length=m_Width*m_Height;
m_Data=(BYTE *)malloc( Length*3 );
for(int i=0,j=0;i<Length;i++,j+=3) {
m_Data[j+0] = (BYTE)( img.Blue[ (BYTE)img.data[i] ] );
m_Data[j+1] = (BYTE)( img.Green[ (BYTE)img.data[i] ] );
m_Data[j+2] = (BYTE)( img.Red[ (BYTE)img.data[i] ] );
}
free(img.data);
return 1;
}
// Load JPG image
if( strcasecmp(ext,"jpg")==0 || strcasecmp(ext,"jpeg")==0 ) {
JPEG_IMAGE img;
strcpy(img.FileName,FileName);
if( !LoadJpegImage(&img) ) {
strcpy(m_LastError,JpegErrorMessage);
return 0;
}
m_Width=img.width;
m_Height=img.height;
m_Data=(BYTE *)img.data;
return 1;
}
// Load PNG image
if( strcasecmp(ext,"png")==0 ) {
PNG_IMAGE img;
strcpy(img.FileName,FileName);
if( !LoadPngImage(&img) ) {
strcpy(m_LastError,PngErrorMessage);
return 0;
}
m_Width=img.width;
m_Height=img.height;
m_Data=(BYTE *)img.data;
return 1;
}
return 1;
}
int CImage::Width() {
return m_Width;
}
int CImage::Height() {
return m_Height;
}
BYTE *CImage::GetData() {
return m_Data;
}
// ------ Get error message if a routine fails ------
char *CImage::GetErrorMessage() {
return m_LastError;
}
// ------ Write a PNG file -----------------------------
char *CImage::WritePNG(char *FileName,int width,int height,BYTE *data) {
return WritePngImage(FileName,width,height,data);
}
// ------ Release memory -----------------------------
void CImage::Release() {
if( m_Data!=NULL ) {
free(m_Data);
m_Data=NULL;
}
m_Width=0;
m_Height=0;
}
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