Can I do clipping in DelphiX...
Author
I just recently moved from PMode DOS to DX Windows, and wondered if clipping is possible in DelphiX or just DirectX 7 with the JEDI headers. -Is there any source code avalible?
AM
AM
TMB Productions
In DirectX there''s a thing DirectClipper. You might need to look at docs for it''s usage.
However, the clipping can also be done by specifying the source and destination bitmap coordinates.
Here''s a C++ code from my previous project BCB library (u''d prolly have to convert it to pascal):
However, the clipping can also be done by specifying the source and destination bitmap coordinates.
Here''s a C++ code from my previous project BCB library (u''d prolly have to convert it to pascal):
int Blit(LPDIRECTDRAWSURFACE surf, int xpos, int ypos, int pattern){ TRect ClipRect; DDSURFACEDESC ddsd; RECT srcRect; RECT dstRect; DWORD dwFlags; HRESULT ddrval; int PWidth = 64; // pattern width & height int PHeight = 64; int PPL = SurfaceWidth / PWidth; // patterns per line int StartX, StartY, LengthX, LengthY; StartX = (pattern % PPL) * PWidth; StartY = (pattern / PPL) * PHeight; LengthX = PWidth; LengthY = PHeight; ZeroMemory(&ddsd, sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); surf->GetSurfaceDesc(&ddsd); ClipRect.Left = 0; ClipRect.Right = ddsd.dwWidth; ClipRect.Top = 0; ClipRect.Bottom = ddsd.dwHeight; if (xpos < ClipRect.Left) { StartX+= (ClipRect.Left - xpos); LengthX-= (ClipRect.Left - xpos); xpos = ClipRect.Left; if (LengthX < 1) return 0; } if (ypos < ClipRect.Top) { StartY+= (ClipRect.Top - ypos); LengthY-= (ClipRect.Top - ypos); ypos = ClipRect.Top; if (LengthY < 1) return 0; } if (xpos + LengthX > ClipRect.Right - 1) { LengthX = ClipRect.Right - xpos - 1; if (LengthX < 1) return 0; } if (ypos + LengthY > ClipRect.Bottom - 1) { LengthY = ClipRect.Bottom - ypos - 1; if (LengthY < 1) return 0; } srcRect.left = StartX; srcRect.top = StartY; srcRect.right = StartX + LengthX; srcRect.bottom = StartY + LengthY; dstRect.left = xpos; dstRect.top = ypos; dstRect.right = xpos + LengthX; dstRect.bottom = ypos + LengthY; dwFlags = DDBLT_WAIT; if (FTrans) dwFlags = dwFlags | DDBLT_KEYSRC; ddrval = surf->Blt(&dstRect, lpDDS, &srcRect, dwFlags, NULL); if (ddrval != DD_OK) return -1; return 0;}
Author
Thanks man, I''ll use it, but if anyone knows how to program the DirectX clipper then please post code for that also.
AM
TMB Productions
AM
TMB Productions
Most of what I know about DirectX in Delphi I learned by digging around the source code for DelphiX. If you look at his TDirectDraw.Surface.Draw() you''ll get a good idea of how DDraw performs clipping...
[ Michael Wilson | turbo sys-op | turbo.gamedev.net ]
[ Michael Wilson | turbo sys-op | turbo.gamedev.net ]
Author
Yeah, I''ve done a little of that already, but I guess I could go deeper into it. -Thanks for your reply.
AM
TMB Productions
AM
TMB Productions
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