GTK2 How to work with 32bpp image pixels?
lazarus / 39-Graphics

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ALLIGATOR · 2025-06-09 18:08

Lazarus, Linux, LCL, GTK2

How can I make it normal?
(Under Windows, a 10x10 pixel square, as expected)

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i procedure
TForm1.FormCreate(Sender: TObject);var  pData: PUint32;  x, y:
integer;begin  Image1.Width:=20;  Image1.Height:=20;  
Image1.Picture.Bitmap.PixelFormat:=pf32bit; 
Image1.Picture.Bitmap.Width:=20;  Image1.Picture.Bitmap.Height:=20;  
Caption := TypInfo.GetEnumName(TypeInfo(TPixelFormat),
Ord(Image1.Picture.Bitmap.PixelFormat));  Caption := Caption + ', ' +
Image1.Picture.Bitmap.RawImage.Description.BitsPerPixel.ToString;  
Image1.Picture.Bitmap.BeginUpdate();  for y:=0 to 9 do  begin   
pData:=PUInt32(Image1.Picture.Bitmap.RawImage.GetLineStart(y));    for
x:=0 to 9 do      PUInt32(pData)[x]:=$FFFFFFFF;  end; 
Image1.Picture.Bitmap.EndUpdate();end;