[Lazarus] Fast drawing to canvas

[Darius Blaszyk]

As said, hardly any speed improvement noticed.

Regards, Darius

On Feb 8, 2012, at 10:42 AM, Felipe Monteiro de Carvalho wrote:

> On Wed, Feb 8, 2012 at 10:37 AM, Graeme Geldenhuys
> <graemeg.lists at gmail.com> wrote:
>> You didn't touch on my other point. Is double buffering enabled by
>> default for all painting routines in the LCL? Or must the end-user /
>> developers specifically enable it somewhere?
> 
> He is using TImage, which is not built for fast changing graphics, it
> is built for displaying a static image or images which change
> sometimes only, so he is already using the wrong architecture.
> 
> But the answer would be: depends. There is a DoubleBuffer property
> which affects only Windows. I think that all other widgetsets always
> do Double-buffering without an option to disable it. But TImage
> probably already defines DoubleBuffer. His flickering could be due to
> partial updates or background erasing. But summing up, his problem is
> using the wrong component for the job, not the DoubleBuffer propery.
> 
> -- 
> Felipe Monteiro de Carvalho
> 
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