file-format

Looking at a screenshot I took on a MacBook Pro with Retina display and running OS X 10.11, I found that it contained these chunks: IHDR, iCCP, pHYs, iTXt, iDOT, IDAT…, IEND All of these are part of the 2003 spec , except for iDOT which is a small (28 bytes) chunk. According to the chunk naming conventions , the fact that its second letter is capital should indicate that it's a chunk with a public specification. I couldn't find its specification anywhere yet though. It's not listed in the Register of public PNG chunks and keywords, Version 1.4.6 either, although that appears to be the latest

I'm having problem with parsing jpeg file. When I hit SOS (start of scan) marker, there are few bytes which meaning I don't understand. In picture bellow, after SOS marker, there are 2 bytes for header length (Ls part on the picture). But what the rest of data on picture mean (for example Ns, Cs1 etc....), and where the pure data starts? Cs1 is a components selection index, This refers back to the SOF section (where horizontal and vertical sampling factors are specified) Td1 is the DC table selector for the current component (Cs1) Ta1 is the AC table selector for the current component (Cs1) Ss

According to the documentation, native (binary) data can be imported or exported with bcp formatted in the native SQL Server data formats. Examples of these are SQLFLT8, SQLFLT4, SQLMONEY or SQLNUMERIC. Does anyone know either what the data formats for the various types are, or where documentation specifying these formats might be found. For example, is a SQLFLT8 stored as an IEEE double precision number or in some other format? Edit: From the answers by kevchadders and Andrew I had a little epiphany did a little bit of googling for #define and typedef to see if I could find C header files

We are developing an application which is able to open and modify a DWG file without converting it to other formats (e.g. PDF, JPG). In this application we need to allow the user to open and view DWG files. Can someone please help us with this? Or suggest some other ways by which we can open and view DWG files without converting it to any other image file format ? We are developing an application...to open and modify a DWG file What in particular do you need help with? You're going to be writing an entire application devoted to opening a specific format of a vector drawing file -- this is no

I know that inform to a reader whether the pdf contains binary or not. But why "25 e2 e3 cf d3" not random binary? Because so many document has that. Is it Just because, so many use same pdf library ? Refs: PDF format. function of %-started sequence comp.text.pdf>pdf format Looking through the PDFs I have here it looks like a number of PDF processors use these very letters "%âãÏÓ", among them Adobe products. Not all of those processors use the same basic PDF library, so the use of the same letters cannot be explained by something like that. Most likely it is due to the fact that Adobe software