c# itextsharp convert pdf to image : A pdf password online application software tool html windows winforms online cips2ed36-part116

F.1. CODE LISTINGS FOR CHAPTER 1
339
*
It returns a 1 if the images are not
*
the same size.
*
*********************************************/
int are_not_same_size(file1, file2)
char *file1, *file2;
{
int result = 0;
long cols1 = 1,
cols2 = 2,
rows1 = 3,
rows2 = 4;
get_image_size(file1, &rows1, &cols1);
get_image_size(file2, &rows2, &cols2);
if(rows1 != rows2 || cols1 != cols2)
result = 1;
return(result);
} /* ends are_not_same_size */
/*********************************************
*
*
equate_bitmapheaders(...
*
*
This function sets the elements of the
*
destination header to the values of the
*
source header.
*
*********************************************/
equate_bitmapheaders(src, dest)
struct bitmapheader *src, *dest;
{
dest->size
= src->size;
dest->width
= src->width;
dest->height
= src->width;
dest->planes
= src->planes;
dest->bitsperpixel = src->bitsperpixel;
A pdf password online - C# PDF Password Library: add, remove, edit PDF file password in C#.net, ASP.NET, MVC, WinForms, WPF
Help to Improve the Security of Your PDF Document by Setting Password
password on pdf file; convert password protected pdf files to word online
A pdf password online - VB.NET PDF Password Library: add, remove, edit PDF file password in vb.net, ASP.NET, MVC, WinForms, WPF
Help to Improve the Security of Your PDF Document by Setting Password
add password to pdf reader; adding password to pdf
340
APPENDIX F. SOURCE CODE LISTINGS
dest->compression = src->compression;
dest->sizeofbitmap = src->sizeofbitmap;
dest->horzres
= src->horzres;
dest->vertres
= src->vertres;
dest->colorsused
= src->colorsused;
dest->colorsimp
= src->colorsimp;
} /* ends equate_bitmapheader */
/******************************************
*
*
get_bitsperpixel(...
*
*
This function reads the bits per pixel
*
from either a tiff or bmp image file.
*
******************************************/
int get_bitsperpixel(file_name, bitsperpixel)
char *file_name;
long *bitsperpixel;
{
int
is_bmp = 0,
is_tiff = 0,
result = 0;
long
temp;
struct bitmapheader bmph;
struct tiff_header_struct tiffh;
if(is_a_bmp(file_name)){
is_bmp = 1;
read_bm_header(file_name, &bmph);
temp = (long)bmph.bitsperpixel;
*bitsperpixel = temp;
} /* ends if is_a_bmp */
if(is_a_tiff(file_name)){
is_tiff = 1;
read_tiff_header(file_name, &tiffh);
*bitsperpixel = tiffh.bits_per_pixel;
} /* ends if is_a_bmp */
Online Remove password from protected PDF file
Online Remove Password from Protected PDF file. Download Free Trial. Remove password from protected PDF file. Find your password-protected PDF and upload it.
convert password protected pdf to word; reader save pdf with password
C# HTML5 PDF Viewer SDK to view PDF document online in C#.NET
RasterEdge. PRODUCTS: ONLINE DEMOS: Online HTML5 Document Viewer; Online XDoc.PDF PDF; Merge PDF Files; Split PDF Document; Remove Password from PDF; Change PDF
pdf user password; break pdf password online
F.1. CODE LISTINGS FOR CHAPTER 1
341
if(is_bmp == 1 || is_tiff == 1)
result = 1;
return(result);
} /* ends get_image_size */
/******************************************
*
*
get_lsb(...
*
*
This function reads the lsb flag
*
from a tiff image file.
*
******************************************/
int get_lsb(name)
char *name;
{
int
result = 0;
struct tiff_header_struct tiff_header;
if(is_a_bmp(name))
result = 1;
if(is_a_tiff(name)){
read_tiff_header(name, &tiff_header);
if(tiff_header.lsb == 1)
result = 1;
} /* ends if is a tiff */
return(result);
} /* ends get_lsb */
Listing 1.1 - The High-Level I/O Routines
VB.NET PDF- View PDF Online with VB.NET HTML5 PDF Viewer
RasterEdge. PRODUCTS: ONLINE DEMOS: Online HTML5 Document Viewer; Online XDoc.PDF PDF; Merge PDF Files; Split PDF Document; Remove Password from PDF; Change PDF
pdf password encryption; break a pdf password
C# HTML5 PDF Viewer SDK to view, annotate, create and convert PDF
document protection. Users are able to set a password to PDF online directly in ASPX webpage. C#.NET: Edit PDF Permission in ASP.NET.
adding a password to a pdf; change password on pdf
342
APPENDIX F. SOURCE CODE LISTINGS
/***********************************************
*
*
read_tiff_header(...
*
*
This function reads the header of a TIFF
*
file and places the needed information into
*
the struct tiff_header_struct.
*
***********************************************/
read_tiff_header(file_name, image_header)
char file_name[];
struct tiff_header_struct *image_header;
{
char buffer[12], response[80];
FILE *image_file;
int bytes_read,
closed,
i,
j,
lsb,
not_finished,
position;
long bits_per_pixel,
image_length,
image_width,
length_of_field,
offset_to_ifd,
strip_offset,
subfile,
value;
short entry_count,
field_type,
s_bits_per_pixel,
s_image_length,
s_image_width,
s_strip_offset,
tag_type;
C# HTML5 PDF Viewer SDK to create PDF document from other file
RasterEdge. PRODUCTS: ONLINE DEMOS: Online HTML5 Document Viewer; Online XDoc.PDF PDF; Merge PDF Files; Split PDF Document; Remove Password from PDF; Change PDF
creating password protected pdf; copy protection pdf
VB.NET PDF - Convert PDF Online with VB.NET HTML5 PDF Viewer
RasterEdge. PRODUCTS: ONLINE DEMOS: Online HTML5 Document Viewer; Online XDoc.PDF PDF; Merge PDF Files; Split PDF Document; Remove Password from PDF; Change PDF
pdf password; password protected pdf
F.1. CODE LISTINGS FOR CHAPTER 1
343
image_file = fopen(file_name, "rb");
if(image_file != NULL){
/*************************************
*
*
Determine if the file uses MSB
*
first or LSB first
*
*************************************/
bytes_read = fread(buffer, 1, 8, image_file);
if(buffer[0] == 0x49)
lsb = 1;
else
lsb = 0;
/*************************************
*
*
Read the offset to the IFD
*
*************************************/
extract_long_from_buffer(buffer, lsb, 4,
&offset_to_ifd);
not_finished = 1;
while(not_finished){
/*************************************
*
*
Seek to the IFD and read the
*
entry_count, i.e. the number of
*
entries in the IFD.
*
*************************************/
position
= fseek(image_file, offset_to_ifd,
SEEK_SET);
bytes_read = fread(buffer, 1, 2, image_file);
extract_short_from_buffer(buffer, lsb, 0,
&entry_count);
/***************************************
*
VB.NET PDF - Create PDF Online with VB.NET HTML5 PDF Viewer
RasterEdge. PRODUCTS: ONLINE DEMOS: Online HTML5 Document Viewer; Online XDoc.PDF PDF; Merge PDF Files; Split PDF Document; Remove Password from PDF; Change PDF
adding a password to a pdf file; pdf document password
VB.NET PDF - Annotate PDF Online with VB.NET HTML5 PDF Viewer
VB.NET PDF - Annotate PDF Online with VB.NET HTML5 PDF Viewer. Explanation about transparency. VB.NET HTML5 PDF Viewer: Annotate PDF Online. This
convert password protected pdf to excel online; protected pdf
344
APPENDIX F. SOURCE CODE LISTINGS
*
Now loop over the directory entries.
*
Look only for the tags we need. These
*
are:
*
ImageLength
*
ImageWidth
*
BitsPerPixel(BitsPerSample)
*
StripOffset
*
*****************************************/
for(i=0; i<entry_count; i++){
bytes_read = fread(buffer, 1, 12, image_file);
extract_short_from_buffer(buffer, lsb, 0,
&tag_type);
switch(tag_type){
case 255: /* Subfile Type */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
extract_long_from_buffer(buffer, lsb, 8,
&subfile);
break;
case 256: /* ImageWidth */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_image_width);
image_width = s_image_width;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&image_width);
break;
case 257: /* ImageLength */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
F.1. CODE LISTINGS FOR CHAPTER 1
345
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_image_length);
image_length = s_image_length;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&image_length);
break;
case 258: /* BitsPerSample */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_bits_per_pixel);
bits_per_pixel = s_bits_per_pixel;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&bits_per_pixel);
break;
case 273: /* StripOffset */
extract_short_from_buffer(buffer, lsb, 2,
&field_type);
extract_short_from_buffer(buffer, lsb, 4,
&length_of_field);
if(field_type == 3){
extract_short_from_buffer(buffer, lsb, 8,
&s_strip_offset);
strip_offset = s_strip_offset;
}
else
extract_long_from_buffer(buffer, lsb, 8,
&strip_offset);
break;
default:
break;
} /* ends switch tag_type */
346
APPENDIX F. SOURCE CODE LISTINGS
} /* ends loop over i directory entries */
bytes_read = fread(buffer, 1, 4, image_file);
extract_long_from_buffer(buffer, lsb, 0,
&offset_to_ifd);
if(offset_to_ifd == 0) not_finished = 0;
} /* ends while not_finished */
image_header->lsb
= lsb;
image_header->bits_per_pixel = bits_per_pixel;
image_header->image_length
= image_length;
image_header->image_width
= image_width;
image_header->strip_offset
= strip_offset;
closed = fclose(image_file);
} /* ends if file opened ok */
else{
printf("\n\nTIFF.C> ERROR - could not open "
"tiff file");
}
} /* ends read_tiff_header */
/****************************************
*
*
read_tiff_image(...
*
*
This function reads the image data
*
from a tiff image file.
*
*
It only works for 8-bit gray scale
*
images.
*
****************************************/
read_tiff_image(image_file_name, the_image)
char
image_file_name[];
short
**the_image;
{
F.1. CODE LISTINGS FOR CHAPTER 1
347
char *buffer, /* CHANGED */
rep[80];
int
bytes_read,
closed,
position,
i,
j;
FILE *image_file;
float a;
long line_length, offset;
struct tiff_header_struct image_header;
read_tiff_header(image_file_name, &image_header);
/***********************************************
*
*
Procedure:
*
Seek to the strip offset where the data begins.
*
Seek to the first line you want.
*
Loop over the lines you want to read:
*
Seek to the first element of the line.
*
Read the line.
*
Seek to the end of the data in that line.
*
************************************************/
image_file = fopen(image_file_name, "rb");
if(image_file != NULL){
position = fseek(image_file,
image_header.strip_offset,
SEEK_SET);
for(i=0; i<image_header.image_length; i++){
bytes_read
= read_line(image_file, the_image,
i, &image_header,
0, image_header.image_width);
} /* ends loop over i */
closed = fclose(image_file);
} /* ends if file opened ok */
else{
printf("\nRTIFF.C> ERROR - cannot open "
"tiff file");
348
APPENDIX F. SOURCE CODE LISTINGS
}
} /* ends read_tiff_image */
/**********************************************
*
*
read_line(...
*
*
This function reads bytes from the TIFF
*
file into a buffer, extracts the numbers
*
from that buffer, and puts them into a
*
ROWSxCOLS array of shorts. The process
*
depends on the number of bits per pixel used
*
in the file (4 or 8).
*
**********************************************/
read_line(image_file, the_image, line_number,
image_header, ie, le)
FILE
*image_file;
int
ie, le, line_number;
short **the_image;
struct tiff_header_struct *image_header;
{
char *buffer, first, second;
float a, b;
int bytes_read, i;
unsigned int bytes_to_read;
union short_char_union scu;
buffer = (char *) malloc(image_header->image_width * sizeof(char ));
for(i=0; i<image_header->image_width; i++)
buffer[i] = ’\0’;
/********************************************
*
*
Use the number of bits per pixel to
*
calculate how many bytes to read.
*
********************************************/
Documents you may be interested
Documents you may be interested