Implementation of PNG 'Get Count' and indexed reads...

[Max TenEyck Woodbury]

On 11/14/2012 10:15 AM, Dmitry Timoshkov wrote:
> Max TenEyck Woodbury <max at mtew.isa-geek.net> wrote:
> 
>> Would calculating the total number of 'row' calls and reading each row
>> as a 'block in turn be an alternate implementation?
> 
> No, your terminology (what is a "row" in PNG?) shows lack of undertsanding
> of what is a block, or what that APIs are supposed to return. Start with
> writing a couple of simple tests, and demonstrate that you really undrestand
> things before asking further questions.
> 
PNG terminology does not mention 'blocks' as such.  It talks about
'rows' and 'chunks'.  'Row' is mentioned in the 'libpng' terminology,
as in reading a 'row' and 'row_pointer'.  It is apparently a unit of
processable data.  Much as a block is apparently a unit of processable
data from the WIC end.

WIC is the end I have only scratched the surface on.