Re: BITMAP & grid

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Thanks Severian,

I just tried. With Rectangle(), I can draw the gird but the interior of the
rectangle also is painted.

If I use FrameRect(), it doesn't work. The following is my source.

void CMyView::OnDraw(CDC* pDC)
{
CBitmap bm;
bm.LoadBitmap(IDB_BITMAP8); //8 pixcel * 8 pixcel as attached.

// Create a pattern brush from the bitmap.
CBrush cBrPattern;
cBrPattern.CreatePatternBrush(&bm);

// Select the brush into a device context, and draw.
CBrush* pOldBrush = (CBrush*)pDC->SelectObject(&cBrPattern);
CPen* pOldPen;
pOldPen = (CPen*)pDC->SelectStockObject(NULL_PEN);

// pDC->Rectangle(CRect(50, 50, 200, 200));
pDC->FrameRect(CRect(50, 50, 200, 200), &cBrPattern);

//Restore the original brush.
pDC->SelectObject(pOldBrush);
pDC->SelectObject(pOldPen);
}

Please help
William

> LineDDA calls back to your code for every point on the line (and
> you're calling SetPixel), which is making it slow.
>
> I would try FrameRect() with a patterned brush.

Attachment:bitmap1.bmp
Description: Windows bitmap

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