PaintDC problem

Graphics and GPU Programming Programming

Started by Faff_Master February 19, 2001 09:14 AM

1 comment, last by Faff_Master 23 years, 1 month ago

122

Author

February 19, 2001 09:14 AM

I''m trying to draw an array of 2D tiles (bitmaps) using Win GDI CPaintDC and CDC. Each tile can draw itself outsite the OnPaint message, but are called from OnPaint(), and are drawn in a loop. The actual blitting does not occur in OnPaint(). I''m using BitBlt() to draw the bitmaps. Only the first tile draws itself, and although the others appear to draw themselves, nothing appears on screen for them. Any ideas?

Faff...URL: http://home.compsoc.com/~dflynn/index.html

qacharg

122

February 19, 2001 04:34 PM

You may want to use InvalidRect() function, to force a repaint,
But I not sure if it''s going to work.

You can check www.codeguru.com , they have a lot of MFC samples and related stuff.

Anonymous

February 21, 2001 06:11 AM

I don''t really get what you are saying but here''s my version of drawing tile in loop outside OnPaint().

  // assume tile size are 40x40// assume you define CDC tile[number_of_tiles] in CTestView.hvoid CTestView::OnLButtonUp(){    CClientDC this_dc(this);    int       k,x;    for (k=0,x=0; k<number_of_tiles; k++,x+=40) {        this_dc.BitBlt(x,0,40,40,&tile[k],0,0,SRCCOPY);    }}