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DC of the window
Posted: Fri Aug 12, 2022 2:39 pm
by Natter
Hi,
There are several .png files. I need to get the DC of each of these files and put it in a specific position on my application window. How can I do this ?
Re: DC of the window
Posted: Fri Aug 12, 2022 4:08 pm
by Antonio Linares
Dear Yuri,
A DC (device context) belongs to a window, not to a PNG file.
I guess that you have several PNG files and you want to paint them on a window, is this correct ?
Re: DC of the window
Posted: Fri Aug 12, 2022 4:14 pm
by Natter
Yes !
Re: DC of the window
Posted: Fri Aug 12, 2022 4:16 pm
by Antonio Linares
Is it an animation ? I mean, do you want to paint them one after another, or just paint them on different locations ?
Do you need them as controls or just to paint them from the ON PAINT of the window ?
Re: DC of the window
Posted: Fri Aug 12, 2022 4:32 pm
by Natter
just paint them on different locations
just to paint them from the ON PAINT of the window
Re: DC of the window
Posted: Fri Aug 12, 2022 4:34 pm
by Antonio Linares
oWnd:bPainted := { || oWnd:DrawImage( cPngFile, aRect )
Re: DC of the window
Posted: Sat Aug 13, 2022 8:21 am
by Natter
Method oWnd:DrawImage( cPngFile, aRect ) works. Is it possible to read from bitmap not all the picture, but only the required fragment ?
Re: DC of the window
Posted: Sat Aug 13, 2022 3:23 pm
by Antonio Linares
Dear Yuri,
> but only the required fragment ?
A rectangular portion of it ?
what required fragment ?
Re: DC of the window
Posted: Sat Aug 13, 2022 6:21 pm
by Natter
There is a picture file of 1920x1080. For example, I need a rectangular fragment {900,500,1000,600}
Re: DC of the window
Posted: Sat Aug 13, 2022 10:48 pm
by nageswaragunupudi
Natter wrote:There is a picture file of 1920x1080. For example, I need a rectangular fragment {900,500,1000,600}
Use this function:
Code: Select all | Expand
function FW_TransformBitmap( hBmp, [aCrop], [nZoom], [nRotate], [nBkClr] )
Example usage:
Code: Select all | Expand
hBmp := oWnd:ReadImage( cPngFile )[ 1 ]
hCropBmp := FW_TransformBitmap( hBmp, aCropRect )
DeleteObject( hBmp )
oWnd:DrawImage( hCropBmp, aRect )`
DeleteObject( hCropBmp )
Re: DC of the window
Posted: Sun Aug 14, 2022 10:24 am
by Natter
Yes, this is what we need.Thanks !