Restored from previous forum. Originally posted by dmoc.
I'm tinkering with Franco's code snippet to capture the desktop. After many trials I cannot get the right syntax for reading data from the bitmap structure returned by "GetCurrentObject_". I have tried many different variations but trying to Peek() raises an illegal op error. Help! Please.
Procedure CaptureDesktop()
DC.l = GetDC_(0)
MDC.l = CreateCompatibleDC_(DC)
Image.l = CreateCompatibleBitmap_(DC,GetSystemMetrics_(#SM_CXSCREEN),GetSystemMetrics_(#SM_CYSCREEN))
SelectObject_(MDC,Image)
BitBlt_(MDC, 0, 0, GetSystemMetrics_(#SM_CXSCREEN), GetSystemMetrics_(#SM_CYSCREEN),DC, 0, 0, $0CC0020)
Bitmap = GetCurrentObject_(MDC, 7)
MessageRequester("Width",Str(PeekL(Bitmap+4)),#MB_OK)
; OpenClipboard_(0)
; EmptyClipboard_()
; SetClipboardData_(2,Image)
; CloseClipboard_()
DeleteObject_(Image)
DeleteDC_(MDC)
ReleaseDC_(0,DC)
EndProcedure
CaptureDesktop()
End
API/ Pointers/ Peek Question
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BackupUser
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Restored from previous forum. Originally posted by dmoc.
Never mind, I think I am going about it the wrong way. My WinAPI knowledge is a bit rusty. Basically I'm trying to capture the desktop as a bitmap so I can use it as a texture in opengl. If anyone has any hints I'd appreciate it. In the mean time I'll trawl the forums again.
Never mind, I think I am going about it the wrong way. My WinAPI knowledge is a bit rusty. Basically I'm trying to capture the desktop as a bitmap so I can use it as a texture in opengl. If anyone has any hints I'd appreciate it. In the mean time I'll trawl the forums again.
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BackupUser
- PureBasic Guru
- Posts: 16777133
- Joined: Tue Apr 22, 2003 7:42 pm
Restored from previous forum. Originally posted by El_Choni.
I think Bitmap is a handle, not a pointer, so you can't Peek it (well, you can, but the code will probably crash). I don't have further info now, but it's not difficult to get that BMP structure, I think there may be even some examples if you search in the forum (try BITMAPINFO, for instance).
Bye,
El_Choni
I think Bitmap is a handle, not a pointer, so you can't Peek it (well, you can, but the code will probably crash). I don't have further info now, but it's not difficult to get that BMP structure, I think there may be even some examples if you search in the forum (try BITMAPINFO, for instance).
Bye,
El_Choni