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ioimage.cpp
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ioimage.cpp
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#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#ifndef __APPLE__
#include <malloc.h>
#endif
#include <setjmp.h>
#include <cassert>
#include <cmath>
#include "vstring.h"
#include "ioimage.h"
#include "vmath.h"
#include "bmp.h"
using namespace std;
struct my_error_mgr
{
struct jpeg_error_mgr pub;
/** "public" fields */
jmp_buf setjmp_buffer;
/** for return to caller */
};
typedef struct my_error_mgr * my_error_ptr;
METHODDEF(void)my_error_exit (j_common_ptr cinfo)
{
my_error_ptr myerr = (my_error_ptr) cinfo->err;
(*cinfo->err->output_message) (cinfo);
longjmp(myerr->setjmp_buffer, 1);
}
char *IOImage::read_pgm(const char *srcfn ,int &width, int &height,int *maxVal)
{
int i, int_tmp, num = 0, count = 0;
vector<int> digits;
width = height = 0;
char header[512];
bool Binary;
char *data;
ifstream inStrm;
inStrm.open(srcfn, fstream::in|ifstream::binary);
if(!inStrm.is_open())
{
cerr << "File '" << srcfn << "' cannot be open!\n";
return NULL;
}
inStrm.getline(header, 512);
if(!strncmp(header, "P5", 2))
{
Binary = true;
}
else if(!strncmp(header, "P2", 2))
{
Binary = false;
}
else
{
cerr<<"'"<<header<<"'"<<" is not valid magic number for PGM format!\n";
exit(0);
}
do
{
if(header[0] != '#')
{
VString::trimAfter(header, '#');
count = VString::parse_words(header, digits);
num += count;
}
if(num < 3)
{
inStrm.getline(header, 512);
}
}
while(num < 3 && !inStrm.eof());
width = digits[0];
height = digits[1];
*maxVal = digits[2];
digits.clear();
data = new char [width*height];
if(Binary)
{
inStrm.read(data, width*height*sizeof(char));
inStrm.close();
}
else
{
inStrm.close();
inStrm.open(srcfn, ifstream::in);
inStrm.getline(header, 512);
do
{
if(header[0] != '#')
{
VString::trimAfter(header, '#');
count = VString::parse_words(header, digits);
num += count;
}
if(num < 3)
{
inStrm.getline(header, 512);
}
}
while(num < 3 && !inStrm.eof());
digits.clear();
for (i = 0; i < height*width; i++)
{
inStrm>>int_tmp;
data[i] = int_tmp;
}
inStrm.close();
}
return data;
}
char *IOImage::read_bmp(const char *fn, int &width, int &height,
int *maxVal, const int channel)
{
ifstream file;
file.open(fn, std::ios::in | std::ios::binary );
if(file.fail())
{
printf("File %s can not open",fn);
return NULL;
}
file.seekg(0, std::ios::end);
long flen = file.tellg();
file.seekg(0, std::ios::beg);
width = height = 0;
char* buffer = new char[flen + 1];
file.read(buffer, flen);
file.close();
char *pBuff = buffer;
BITMAPFILEHEADER* bmpheader = new BITMAPFILEHEADER;
BITMAPINFOHEADER* bmih = new BITMAPINFOHEADER;
memcpy(bmpheader, pBuff, sizeof(BITMAPFILEHEADER));
BITMAPFILEHEADER* bmfh = bmpheader;
pBuff += sizeof(BITMAPFILEHEADER);
/// verify that it's a BITMAP file
if(bmfh->bfType != BITMAP_ID)
{
delete [] buffer;
buffer = NULL;
cout<<hex<<bmfh->bfType<<endl;
cout<<"File is not standard BMP type or the program is unable to recorgnize it!\n";
return NULL;
}
memcpy(bmih, pBuff, sizeof(BITMAPINFOHEADER));
pBuff += sizeof(BITMAPINFOHEADER);
int bitCount = bmih->biBitCount;
int colors = bitCount/8;
///int compression = bmih->biCompression;
unsigned char r = 0, g = 0, b = 0;
unsigned int pt = 0, pt3 = 0;
*maxVal = 0;
int i = 0, j = 0;
width = bmih->biWidth;
height = bmih->biHeight;
int jump;
int sz = bmih->biSizeImage;
if( sz > (colors*width*height))
{
jump = sz - colors*width*height;
jump = jump/height;
}
else
{
jump = 0;
}
char *data = NULL;
/// move the pixel data Pointer to the begining of bitmap data
pBuff = buffer + (bmfh->bfOffBits);
if(bmih->biCompression == 1)
{
char *rawData = IOImage::decmp_bmp(pBuff, width, height, maxVal);
delete bmpheader;
delete [] buffer;
delete bmih;
if(channel == 3)
{
data = new char[width*height*3];
for(j = 0 ; j < height; j++)
{
pt = width*j;
pt3 = width*j*3;
for(i = 0 ; i < width ; i++)
{
data[pt3+i*3] = rawData[pt+i];
data[pt3+i*3+1] = rawData[pt+i];
data[pt3+i*3+2] = rawData[pt+i];
}
}
delete [] rawData;
rawData = NULL;
return data;
}
else
{
return rawData;
}
}
else if(bmih->biCompression > 1)
{
cout<<"color BMP with RLE compression is not supported!\n";
width = height = 0;
return NULL;
}
if(channel == 1 || channel == 3)
{
data = new char[channel*width*height];
}
else
{
cout<<"Channel should be eigther 1 or 3\n";
exit(1);
}
for(j = height ; j > 0 ; j--)
{
pt = width*(j-1);
for(i = 0 ; i < width ; i++)
{
if(channel == 3 && colors == 3)
{
data[3 * (pt+ i)] = *(pBuff++);
data[3 * (pt + i)+1] = *(pBuff++);
data[3 * (pt + i)+2] = *(pBuff++);
}
else if(channel == 1 && colors == 3)
{
r = *(pBuff++);
g = *(pBuff++);
b = *(pBuff++);
data[pt] = (r+g+b)/3;
*maxVal = (*maxVal)>data[pt]?(*maxVal):data[pt];
pt++;
}
else if(channel == 3 && colors == 1)
{
data[3 * (pt+ i)] = *(pBuff);
data[3 * (pt + i)+1] = *(pBuff);
data[3 * (pt + i)+2] = *(pBuff++);
}
else
{
data[pt+ i] = *(pBuff++);
}
}
pBuff = pBuff+jump;
}
delete bmpheader;
delete [] buffer;
buffer = NULL;
delete bmih;
return data;
}
char *IOImage::decmp_bmp(char *pBuff, const int w, const int h, int *maxVal)
{
unsigned char firstByte = 0, secondByte = 0;
unsigned int x = 0, y = 0, i = 0, state = 0;
char *data = new char[w*h];
memset(data, 0, w*h);
*maxVal = 0;
while(state == 0)
{
firstByte = *pBuff;
pBuff++;
if( firstByte != 0)
{
secondByte = *pBuff;
for(i = 0; i < firstByte; i++)
{
data[y*w+x] = secondByte;
*maxVal = (*maxVal < secondByte)?secondByte:(*maxVal);
x++;
}
pBuff++;
}
else
{
firstByte = *pBuff; // store next byte
pBuff++;
switch (firstByte)
{
case 0:
{
x = 0;
y++; // next row
break;
}
case 1:
{
state = 1;
break; // end of bitmap
}
case 2:
{
x += (int)(*pBuff); // read byte and add value to x value
pBuff++;
y += (int)(*pBuff); // read byte and add value to y value
pBuff++;
break;
}
default:
{
for(i = 0; i < firstByte; i++)
{
secondByte = *pBuff;
data[y*w+x] = secondByte;
*maxVal = (*maxVal < secondByte)?secondByte:(*maxVal);
pBuff++;
x++;
}
if((firstByte & 0x01) != 0) // if the run doesn't end on a word boundary,
pBuff++; // advance the pointer
}
} //end-switch
} //end-if-else
} //end-while
return data;
}
char *IOImage::read_jpg(const char *srcfn, int &w, int &h,
int *MaxVal, const int channel)
{
struct jpeg_decompress_struct cinfo;
struct my_error_mgr jerr;
JSAMPARRAY buffer;
int row_stride;
FILE *infile;
/** physical row width in output buffer **/
if ((infile = fopen(srcfn, "rb")) == NULL)
{
fprintf(stderr, "can't open %s\n", srcfn);
return 0;
}
/** Step 1: allocate and initialize JPEG decompression object **/
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer))
{
jpeg_destroy_decompress(&cinfo);
fclose(infile);
return 0;
}
jpeg_create_decompress(&cinfo);
/** Step 2: specify data source (eg, a file) **/
jpeg_stdio_src(&cinfo, infile);
/** Step 3: read file parameters with jpeg_read_header() **/
jpeg_read_header(&cinfo, TRUE);
/** Step 4: set parameters for decompression **/
/** Step 5: Start decompressor **/
(void) jpeg_start_decompress(&cinfo);
/** JSAMPLEs per row in output buffer **/
row_stride = cinfo.output_width * cinfo.output_components;
w = cinfo.output_width;
h = cinfo.output_height;
int ch = cinfo.output_components;
unsigned char *body = new unsigned char[ w*h*ch];
unsigned char *data = new unsigned char[ w*h*channel];
/** Make a one-row-high sample array that will go away when done with image **/
buffer = (*cinfo.mem->alloc_sarray)((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
/** Step 6: while (scan lines remain to be read) **/
int k, row_number;
*MaxVal = 0;
float pix_val;
int ich, _ich;
unsigned char *row;
while (cinfo.output_scanline < cinfo.output_height)
{
jpeg_read_scanlines(&cinfo, buffer, 1);
row_number = cinfo.output_scanline-1;
row = body+row_number*row_stride;
for(k = 0; k < row_stride; k+=ch )
{
for(ich = 0; ich < ch; ich++)
{
_ich = ch - ich - 1;
row[k+ich] = buffer[0][k+_ich];
if(row[k+ich] > *MaxVal)
{
*MaxVal = row[k+ich];
}
}
}
}
int rowloc, rowloc_dt, i, j;
if(ch == channel)
{
memcpy(data, body, sizeof(unsigned char)*w*h*ch);
}
else if (ch == 1 && channel == 3)
{
for(i = 0; i < h; i++)
{
for(j = 0; j < w; j+=ch)
{
rowloc_dt = (i*w+j)*channel;
rowloc = i*w + j;
data[rowloc_dt] = body[rowloc];
data[rowloc_dt+1] = body[rowloc];
data[rowloc_dt+2] = body[rowloc];
}
}
}
else if(ch == 3 && channel == 1)
{
unsigned char tmpval = 0;
for(i = 0; i < h; i++)
{
for(j = 0; j < w; j++)
{
rowloc = (i*w+j)*ch;
rowloc_dt = i*w+j;
pix_val = (body[rowloc]+body[rowloc+1]+body[rowloc+2])/3.0f;
tmpval = (unsigned char)round(pix_val);
if(tmpval > *MaxVal)
{
*MaxVal = tmpval;
}
data[rowloc_dt] = tmpval;
}
}
}
/** Step 7: Finish decompression **/
(void) jpeg_finish_decompress(&cinfo);
/** Step 8: Release JPEG decompression object **/
jpeg_destroy_decompress(&cinfo);
fclose(infile);
delete [] body;
return (char*)data;
}
char *IOImage::read_ppm(const char *srcfn, int &w, int &h,
int *maxVal, const int channel)
{
assert(srcfn);
char red, green, blue, val;
int count = 0, num = 0, color[3], xi, x, y;
unsigned int rowloc;
unsigned char *data = NULL;
vector<int> digits;
char header[256];
ifstream inStrm;
bool Binary = false;
float gray;
inStrm.open(srcfn, fstream::in|ifstream::binary);
if(!inStrm.is_open())
{
cerr << "File '" << srcfn << "' cannot be opened.\n";
return NULL;
}
inStrm.getline(header, 256);
if(!strncmp(header, "P6", 2))
{
Binary = true;
}
else if (!strncmp(header, "P3", 2))
{
Binary = false;
}
else
{
cerr<<"'"<<header<<"'"<<" is not valid magic number for PGM format!\n";
exit(0);
}
do
{
if(header[0] != '#')
{
VString::trimAfter(header, '#');
count = VString::parse_words(header, digits);
num += count;
}
if(num < 3)
{
inStrm.getline(header, 256);
}
}
while(num < 3 && !inStrm.eof());
w = digits[0];
h = digits[1];
if(channel == 3)
*maxVal = digits[2];
else
*maxVal = 0;
digits.clear();
data = new unsigned char [channel*w*h];
if(Binary)
{
if(channel == 1)
{
for(y = 0; y < h; y++)
{
rowloc = y*w;
for (x = 0; x < w; x++)
{
inStrm.get(red);
inStrm.get(green);
inStrm.get(blue);
color[0] = (red&127) + (red&128);
color[1] = (green&127) + (green&128);
color[2] = (blue&127) + (blue&128);
gray = (color[0]+color[1]+color[2]+0.0f)/3.0f;
val = (unsigned char)floor(gray);
*maxVal = *maxVal< val?val:*maxVal;
data[rowloc+x] = val;
}
}
}
else if(channel == 3)
{
xi = 0;
for(y = 0; y < h; y++)
{
rowloc = y*w*channel;
for (x = 0, xi = 0; x < w; x++, xi+=3)
{
inStrm.get(red);
inStrm.get(green);
inStrm.get(blue);
color[0] = (red&127) + (red&128);
color[1] = (green&127) + (green&128);
color[2] = (blue&127) + (blue&128);
data[rowloc+xi+2] = color[0];
data[rowloc+xi+1] = color[1];
data[rowloc+xi] = color[2];
}
}
}
inStrm.close();
}///end if (Binary)
else
{
inStrm.close();
inStrm.open(srcfn, fstream::in);
inStrm.getline(header, 256);
do
{
if(header[0] != '#')
{
VString::trimAfter(header, '#');
count = VString::parse_words(header, digits);
num += count;
}
if(num < 3)
{
inStrm.getline(header, 256);
}
}
while(num < 3 && !inStrm.eof());
digits.clear();
if(channel == 1)
{
for (xi = 0; xi < w*h; xi++)
{
inStrm>>color[0];
inStrm>>color[1];
inStrm>>color[2];
gray = (color[0] + color[1] + color[2])/3.0f;
val = (unsigned char)round(gray);
*maxVal = *maxVal< val?val:*maxVal;
data[xi] = val;
}
}
else
{
xi = 0;
for(y = 0; y < h; y++)
{
rowloc = y*w*3;
for (x = 0, xi = 0; x < w; x++, xi+=3)
{
inStrm>>color[0];
inStrm>>color[1];
inStrm>>color[2];
data[rowloc+xi+2] = color[0];
data[rowloc+xi+1] = color[1];
data[rowloc+xi] = color[2];
}
}
}
inStrm.close();
}
return (char*)data;
}
int IOImage::write_pgm(const char *fn, const int w, const int h, const unsigned char *data,
const unsigned char maxval, const char* comment_string, const int channel)
{
FILE *file = fopen(fn, "wb");
unsigned char *tmpdata = new unsigned char[w*h];
int pt = 0;
float val;
unsigned int uval, mval = 0;
int i, j;
if(channel == 1)
{
for(i = 0; i < h; i++)
{
for(j = 0; j < w; j++)
{
tmpdata[pt] = data[pt];
mval = mval < tmpdata[pt]?tmpdata[pt]:mval;
pt++;
}
}
}
else if(channel == 3)
{
for(int i = 0; i < h; i++)
{
for(int j = 0; j < w; j++)
{
val = data[3*(i*w+j)];
val = data[3*(i*w+j)+1] + val;
val = data[3*(i*w+j)+2] + val;
uval = (unsigned int)floor(val/3.0);
mval = uval > mval?uval:mval;
tmpdata[pt] = (unsigned char)uval;
pt++;
}
}
}
if (file== NULL)
{
printf("File %s open failed in write pgm\n",fn);
return(-1);
}
fprintf(file,"P5\n");
if (comment_string != NULL)
fprintf(file,"# %s\n", comment_string);
fprintf(file,"%d %d\n", w, h);
fprintf(file, "%d\n", mval);
fwrite((void*)tmpdata, sizeof(unsigned char), (w)*(h), file);
fclose(file);
delete [] tmpdata;
return 0;
}
int IOImage::write_pgm(const char *fn, int w, int h, const float *data, const unsigned char maxval,
const char *comment_string, const int channel)
{
FILE *file= fopen(fn, "wb");
unsigned char *tmpdata = new unsigned char[w*h];
int pt = 0;
float val;
unsigned int uval, mval = 0;
int i, j;
if(channel == 1)
{
for(i = 0; i < h; i++)
{
for(j = 0; j < w; j++)
{
tmpdata[pt] = (unsigned char)round(data[pt]);
mval = mval < tmpdata[pt]?tmpdata[pt]:mval;
pt++;
}
}
}
else if(channel == 3)
{
for(int i = 0; i < h; i++)
{
for(int j = 0; j < w; j++)
{
val = data[3*(i*w+j)];
val = data[3*(i*w+j)+1] + val;
val = data[3*(i*w+j)+2] + val;
uval = (unsigned int)floor(val/3.0);
mval = uval > mval?uval:mval;
tmpdata[pt] = (unsigned char)uval;
pt++;
}
}
}
if (file== NULL)
{
printf("File %s open failed in write pgm\n",fn);
return(-1);
}
fprintf(file, "P5\n");
if (comment_string != NULL)
fprintf(file,"# %s\n", comment_string);
fprintf(file,"%d %d\n", w, h);
fprintf(file, "%d\n", mval);
fwrite((void*)tmpdata, sizeof(unsigned char), (w)*(h), file);
fclose(file);
delete [] tmpdata;
return 0;
}
void IOImage::write_bmp(const char *dstfn,const int w,const int h,const unsigned char *body,const int channel)
{
int image_data_size = w * h;
image_data_size *= 4;
int hexIdent[4];
int hexWidth[4];
int hexHeight[4];
int hexFileSize[4];
VMath::dec2hex(w, hexWidth);
VMath::dec2hex(h, hexHeight);
VMath::dec2hex(image_data_size+54, hexFileSize);
VMath::dec2hex(image_data_size, hexIdent);
FILE * maskFile = fopen(dstfn , "w+b");
char headerArray[54];
headerArray[0] =(char)0x42 ;
headerArray[1] =(char)0x4D ;
headerArray[2] =(char)hexFileSize[0] ;
headerArray[3] =(char)hexFileSize[1] ;
headerArray[4] =(char)hexFileSize[2] ;
headerArray[5] =(char)hexFileSize[3] ;
headerArray[6] = (char)0x0;
headerArray[7] = (char)0x0;
headerArray[8] = (char)0x0;
headerArray[9] = (char)0x0;
headerArray[10] = (char)0x36;
headerArray[11] = (char)0x0;
headerArray[12] = (char)0x0;
headerArray[13] = (char)0x0;
headerArray[14] = (char)0x28;
headerArray[15] = (char)0x0;
headerArray[16] = (char)0x0;
headerArray[17] = (char)0x0;
headerArray[18] = (char)hexWidth[0];
headerArray[19] = (char)hexWidth[1];
headerArray[20] = (char)hexWidth[2];
headerArray[21] = (char)hexWidth[3];
headerArray[22] = (char)hexHeight[0];
headerArray[23] = (char)hexHeight[1];
headerArray[24] = (char)hexHeight[2];
headerArray[25] = (char)hexHeight[3];
headerArray[26] = (char)0x01;
headerArray[27] = (char)0x0;
headerArray[28] = (char)0x20;
headerArray[29] = (char)0x0;
headerArray[30] = (char)0x0;
headerArray[31] = (char)0x0;
headerArray[32] = (char)0x0;
headerArray[33] = (char)0x0;
headerArray[34] = (char)hexIdent[0];
headerArray[35] = (char)hexIdent[1];
headerArray[36] = (char)hexIdent[2];
headerArray[37] = (char)hexIdent[3];
headerArray[38] = (char)0xC4;
headerArray[39] = (char)0x0E;
headerArray[40] = (char)0x0;
headerArray[41] = (char)0x0;
headerArray[42] = (char)0xC4;
headerArray[43] = (char)0x0E;
headerArray[44] = (char)0x0;
headerArray[45] = (char)0x0;
headerArray[46] = (char)0x0;
headerArray[47] = (char)0x0;
headerArray[48] = (char)0x0;
headerArray[49] = (char)0x0;
headerArray[50] = (char)0x0;
headerArray[51] = (char)0x0;
headerArray[52] = (char)0x0;
headerArray[53] = (char)0x0;
fwrite(headerArray, sizeof(char), 54, maskFile);
fclose(maskFile);
maskFile = fopen( dstfn, "a+b");
unsigned char* data = new unsigned char[image_data_size];
int index=0;
int indexM;
for(int m=0; m<h; m++)
{
for(int n=0; n<w; n++)
{
index = channel*(m*w+n);
indexM = 4*((h-m-1)*w+n);
if( channel == 3 )
{
data[indexM ] = (int)round(body[index]);
data[indexM+1] = (int)round(body[index+1]); //(int)round(body[index+1]);
data[indexM+2] = (int)round(body[index+2]); //(int)round(body[index+2]);
data[indexM+3] = 0;
}
else if( channel == 1 )
{
data[indexM ] = (int)round(body[index]);
data[indexM+1] = (int)round(body[index]);
data[indexM+2] = (int)round(body[index]);
data[indexM+3] = 0;
}
}
}
fwrite(data, sizeof(char), image_data_size, maskFile);
fclose(maskFile);
delete []data;
data = NULL;
}
void IOImage::write_bmp(const char *dstfn,const int w, const int h, const float *body,const int channel)
{
int image_data_size = 4*w * h;
int hexWidth[4];
int hexHeight[4];
int hexFileSize[4];
int hexIdent[4];
VMath::dec2hex(w, hexWidth);
VMath::dec2hex(h, hexHeight);
VMath::dec2hex(image_data_size+54, hexFileSize);
VMath::dec2hex(image_data_size, hexIdent);
FILE * maskFile = fopen(dstfn , "w+b");
char headerArray[54];
headerArray[0] =(char)0x42 ;
headerArray[1] =(char)0x4D ;
headerArray[2] =(char)hexFileSize[0] ;
headerArray[3] =(char)hexFileSize[1] ;
headerArray[4] =(char)hexFileSize[2] ;
headerArray[5] =(char)hexFileSize[3] ;
headerArray[6] = (char)0x0;
headerArray[7] = (char)0x0;
headerArray[8] = (char)0x0;
headerArray[9] = (char)0x0;
headerArray[10] = (char)0x36;
headerArray[11] = (char)0x0;
headerArray[12] = (char)0x0;
headerArray[13] = (char)0x0;
headerArray[14] = (char)0x28;
headerArray[15] = (char)0x0;
headerArray[16] = (char)0x0;
headerArray[17] = (char)0x0;
headerArray[18] = (char)hexWidth[0];
headerArray[19] = (char)hexWidth[1];
headerArray[20] = (char)hexWidth[2];
headerArray[21] = (char)hexWidth[3];
headerArray[22] = (char)hexHeight[0];
headerArray[23] = (char)hexHeight[1];
headerArray[24] = (char)hexHeight[2];
headerArray[25] = (char)hexHeight[3];
headerArray[26] = (char)0x01;
headerArray[27] = (char)0x0;
headerArray[28] = (char)0x20;
headerArray[29] = (char)0x0;
headerArray[30] = (char)0x0;
headerArray[31] = (char)0x0;
headerArray[32] = (char)0x0;
headerArray[33] = (char)0x0;
headerArray[34] = (char)hexIdent[0];
headerArray[35] = (char)hexIdent[1];
headerArray[36] = (char)hexIdent[2];
headerArray[37] = (char)hexIdent[3];
headerArray[38] = (char)0xC4;
headerArray[39] = (char)0x0E;
headerArray[40] = (char)0x0;
headerArray[41] = (char)0x0;
headerArray[42] = (char)0xC4;
headerArray[43] = (char)0x0E;
headerArray[44] = (char)0x0;
headerArray[45] = (char)0x0;
headerArray[46] = (char)0x0;
headerArray[47] = (char)0x0;
headerArray[48] = (char)0x0;
headerArray[49] = (char)0x0;
headerArray[50] = (char)0x0;
headerArray[51] = (char)0x0;
headerArray[52] = (char)0x0;
headerArray[53] = (char)0x0;
fwrite(headerArray, sizeof(char), 54, maskFile);
fclose(maskFile);
maskFile = fopen( dstfn, "a+b");
unsigned char* data = new unsigned char[image_data_size];
int index=0;
int indexM;
for(int m = 0; m < h; m++)
{
for(int n=0; n<w; n++)
{
index = channel*(m*w+n);
indexM = 4*((h-m-1)*w+n);
if( channel == 3 )
{
data[indexM ] = (int)round(body[index]);
data[indexM+1] = (int)round(body[index+1]); //(int)round(body[index+1]);
data[indexM+2] = (int)round(body[index+2]); //(int)round(body[index+2]);
data[indexM+3] = 0;
}
else if( channel == 1 )
{
data[indexM ] = (int)round(body[index]);
data[indexM+1] = (int)round(body[index]);
data[indexM+2] = (int)round(body[index]);
data[indexM+3] = 0;
}
}
}
fwrite(data, sizeof(char), image_data_size, maskFile);
fclose(maskFile);
delete []data;
data = NULL;
}
void IOImage::write_jpg(const char *srcfn, const unsigned char *data, const int w, const int h, const int ch, const int quality)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
assert(data);
FILE * outfile;
JSAMPROW row_pointer[1];
/** pointer to JSAMPLE row[s] **/
int row_stride;
/** physical row width in image buffer **/
/** Step 1: allocate and initialize JPEG compression object **/
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
unsigned char* body = new unsigned char[h*w*ch];
int i, j, rowloc;
row_stride = w*ch;
if(ch == 3)
{
for(i = 0; i < h; i++)
{
rowloc = i*w*ch;
for(j = 0; j < row_stride; j+=ch)
{
body[rowloc+j] = (unsigned char) data[rowloc+j+2];
body[rowloc+j+1] = (unsigned char) data[rowloc+j+1];
body[rowloc+j+2] = (unsigned char) data[rowloc+j];
}
}
}
else
{