| Re: Backing Store Question [message #45455] |
Fri, 16 September 2005 11:32 |
Michael Wallace
Messages: 409
Registered: December 2003
|
Senior Member |
|
|
>> The Commodore 64?
>
>
> No, it works on my C64 using the x86 emulator. I think they are talking
> about the Timex Sinclair 1000 but I'm not sure since I haven't been able
> to find enough audio cassette tapes to copy my IDL CD onto to load it up.
Wow. You learn something new every day. All this time I though they
were talking about Radio Shack's TRS-80.
|
|
|
|
| Re: Backing Store Question [message #45456 is a reply to message #45455] |
Fri, 16 September 2005 11:09  |
Rick Towler
Messages: 821
Registered: August 1998
|
Senior Member |
|
|
R.G. Stockwell wrote:
> "David Fanning" wrote
>
>> Folks,
>>
>> In poking around in the IDL documentation this morning, I came
>> upon this in the WIDGET_DRAW documentation:
>>
>> On some systems, when backing store is provided by the
>> window system (RETAIN=1), reading data from a window
>> using TVRD( ) may cause unexpected results. For example,
>> data may be improperly read from the window even when
>> the image displayed on screen is correct. Having IDL
>> provide the backing store (RETAIN=2) ensures that the
>> window contents will be read properly.
>>
>> Anybody have any idea which systems this is taking about?
>
>
>
> The Commodore 64?
No, it works on my C64 using the x86 emulator. I think they are talking
about the Timex Sinclair 1000 but I'm not sure since I haven't been able
to find enough audio cassette tapes to copy my IDL CD onto to load it up.
|
|
|
|
| Re: Backing Store Question [message #45463 is a reply to message #45456] |
Fri, 16 September 2005 07:31 |
R.G. Stockwell
Messages: 363
Registered: July 1999
|
Senior Member |
|
|
"David Fanning" <davidf@dfanning.com> wrote in message
news:MPG.1d947822e772a52c989a86@news.frii.com...
> Folks,
>
> In poking around in the IDL documentation this morning, I came
> upon this in the WIDGET_DRAW documentation:
>
> On some systems, when backing store is provided by the
> window system (RETAIN=1), reading data from a window
> using TVRD( ) may cause unexpected results. For example,
> data may be improperly read from the window even when
> the image displayed on screen is correct. Having IDL
> provide the backing store (RETAIN=2) ensures that the
> window contents will be read properly.
>
> Anybody have any idea which systems this is taking about?
The Commodore 64?
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
