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Date Posted: 07:09:35 11/07/02 Thu
Author: Chris
Subject: Re: Drawing speed
In reply to: Michel 's message, "Re: Drawing speed" on 06:21:43 11/05/02 Tue

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?


>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
>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,
>>What is the fastest method to draw pixels and lines
>>and to check if a pixel is set (black) or not (white).

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