capturing an are under the mouse

Baggey · October 31, 2024, 18:41:22

Im looking for inspiration or ideas on how i would select a screen area with the mouse drag and drop.

Once selected save as a Tpixmap / png

The idea is select an area no bigger than 64 x 64 and then capture selected pixels which i can grab the pixel data

Kind Regards Baggey

Midimaster · October 31, 2024, 23:32:17

Why not using GrabImage() or GrabPixMap?

GW · November 01, 2024, 19:55:57

EDIT: I realized this is already in the code archives : https://www.syntaxbomb.com/miscellaneous/bmx-tselectionbox-thing-by-ked-1-years-ago/msg3586/

Here ya go.

Code: BASIC

Type tSelectBox
	Field x:Int, y:Int, x2:Int, y2:Int
	
	Method New(startx:Int, starty:Int)
		x = startx
		y = starty
		x2 = startx + 1
		y2 = starty + 1
	End Method
	
	Method Update(mx:Int, my:Int)
		Local tmp:Int
		
'		x = Min(Min(x, mx), x2)
'		x2 = Max(Max(x, mx), x2)
'		
'		y = Min(Min(y, my), y2)
'		y2 = Max(Max(y, my), y2)
'		Return
		
		If mx > x Then
			'x = x2
			x2 = mx
		Else
			x = mx
		EndIf
		
		If my > y Then
			'y = y2
			y2 = my
		Else
			y = my
		EndIf

	End Method
	
	Method Draw()
		SetAlpha 0.3
		SetColor 0, 0, 0
		DrawRect(x, y, x2 - x, y2 - y)
		SetAlpha 1
		SetColor 255, 255, 255
		DrawRectHollow(x, y, x2 - x, y2 - y)
	End Method
	
End Type

Baggey · November 02, 2024, 09:37:52

Thanks @GW

That's given me an idea combing @Midimaster grabimage idea. Im thinking of being able to scroll over an image and what ever is under the select rectangle will be able to manipulate the pixels into 8x8 or 16x16 etc. A form of graphics ripper from the Spectrum memory in SpecMax's memory. Which could be saved as .txt file. For further manipulation or just save the bitmap that's altered if it is indeed a graphic $:-\$

Baggey

SyntaxBomb - Indie Coders

capturing an are under the mouse

Baggey

Midimaster

GW

Baggey