changing a 256 color bitmap palette

ADS

Delphi Developer

Mon, 12 Jan 2004 19:32:01 GMT

changing a 256 color bitmap palette

Hello,

how can I change a palette entry of a 256 color bitmap?

thanks

Armindo

Charles Hacke

Delphi Developer

Tue, 13 Jan 2004 12:10:16 GMT

Re:changing a 256 color bitmap palette

Quote

ADS wrote:

> how can I change a palette entry of a 256 color bitmap?

Earls site has info on thus:

http://www.efg2.com/Lab/Library/Delphi/Graphics/Color.htm

Look under 'Pallete Examples'

--
Charles Hacker
Lecturer in Electronics and Computing
School of Engineering
Griffith University - Gold Coast
Australia

Bob Villier

Delphi Developer

Tue, 13 Jan 2004 21:33:00 GMT

Re:changing a 256 color bitmap palette

This topic got a good airing last month under "How can I change a color
in a bitmap palette ?"

Here is how to load a 256 bitmap, change the first palette entry to
blue and display the changed bitmap.

Var
bmp: TBitmap;
NewCol: TRGBQuad;
begin
bmp := TBitmap.Create;
bmp.LoadFromFile('chemical.bmp');

NewCol.rgbBlue := 255;
NewCol.rgbGreen := 0;
NewCol.rgbRed := 0;
NewCol.rgbReserved := 0;

SetDIBColorTable(bmp.Canvas.Handle, 255, 1, NewCol);

Image1.Picture.Graphic:= bmp;
bmp.Free;
end;

Bob
---
Sent using Virtual Access 5.01 - download your freeware copy now
http://www.atlantic-coast.com/downloads/vasetup.exe

ADS

Delphi Developer

Tue, 13 Jan 2004 23:22:02 GMT

Re:changing a 256 color bitmap palette

thanks

Armindo

Quote

> This topic got a good airing last month under "How can I change a color
> in a bitmap palette ?"

> Here is how to load a 256 bitmap, change the first palette entry to
> blue and display the changed bitmap.

> Var
> bmp: TBitmap;
> NewCol: TRGBQuad;
> begin
> bmp := TBitmap.Create;
> bmp.LoadFromFile('chemical.bmp');

> NewCol.rgbBlue := 255;
> NewCol.rgbGreen := 0;
> NewCol.rgbRed := 0;
> NewCol.rgbReserved := 0;

> SetDIBColorTable(bmp.Canvas.Handle, 255, 1, NewCol);

> Image1.Picture.Graphic:= bmp;
> bmp.Free;
> end;

> Bob
> ---
> Sent using Virtual Access 5.01 - download your freeware copy now
> http://www.atlantic-coast.com/downloads/vasetup.exe

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