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Date Posted: 06:48:51 11/08/02 Fri
Author: Michel
Subject: Re: Drawing speed
In reply to: Chris 's message, "Re: Drawing speed" on 07:09:35 11/07/02 Thu


Hi Chris,

It is a little faster, but I am not sure you will see a difference. You will need to try it out.

Best regards,

Michel

>Hi Michel,
>
>Somewhere, you mention the TDibGraphic.PaletteIndex as
>a faster alternative method than TDibGraphic.RGB.
>I use 1 bit graphics. How much faster is PaletteIndex?
>
>Chris
>
>>
>>Hi Chris,
>>
>>The fastest, but hardest way to access the pixels is
>>the use the TDibGraphic.ScanLine property, but you
>>need to know the layout of the bits based on the image
>>format. There are some examples of this in
>>EnTransf.Pas.
>>
>>A compromise is to use the TDibGraphic.RGB property,
>>which accesses the bits directly in memory with a
>>slight overhead.
>>
>>The slowest but most flexible is to use the
>>TDibGraphic.Canvas, which has higher level routines
>>such as circles, rectangles, etc...
>>
>>Best regards,
>>
>>Michel
>>>What is the fastest method to draw pixels and lines
>>>and to check if a pixel is set (black) or not
>(white).
>>>Chris

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