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speeding up menu rendering

Started by vboyx May 22, 2003 at 9:55 PM 5 replies 400+ views

Original Post

May 22, 2003 at 9:55 PM

is there anyway to speed this up? it draws a button/menu, much like the ones in the WinGui

void DrawButton(RECT dest, HDC destDC)
{
	int Top,Left,Right,Bottom;
	Top = dest.top;
	Left = dest.left;
	Right = dest.right;
	Bottom = dest.bottom;

        for (Top = dest.top;Top <= Bottom;Top++)
        {
	     for (Left = dest.left; Left <= Right; Left++)
	     {
	     SetPixel(destDC,Left,Top,RGB(128,128,128));
	     SetPixel(destDC,dest.left,Top,RGB(190,190,190));
	     SetPixel(destDC,Left,dest.top,RGB(190,190,190));
	     SetPixel(destDC,Right,Top,RGB(91,91,91));
	     SetPixel(destDC,Left,Bottom,RGB(91,91,91));
	     }
        }
}

[edited by - vboyx on May 22, 2003 10:57:28 PM] [edited by - vboyx on May 22, 2003 10:57:48 PM]

Endurion

May 23, 2003 at 6:03 AM

Use everything but SetPixel.
If you want to draw it up yourself, use lines.
Or use DrawFrameControl, lets Windows do the work.

vboyx

May 23, 2003 at 4:13 PM

duh...but whats the function for
drawing a line? and i am going
to use a DC to hold the data.

Leadorn

May 23, 2003 at 5:40 PM

You can use LineTo and MoveEx for line drawing, else you can have a bitmap with the button texture and Blit it to screen instead of drawing it.

  
HBITMAP LoadBMP(char *szFileName)
{	
	//Handle to bitmap

	HBITMAP HBitmap = 0;
	
	HBitmap = (HBITMAP) LoadImage(0,szFileName,IMAGE_BITMAP,0,0,LR_DEFAULTCOLOR|LR_LOADFROMFILE);
	if(HBitmap == 0) return 0;
	
	return HBitmap;
}	
//Create a offscreen dc.


BITMAP Bitmap;
GetObject(HBitmap,sizeof(BITMAP),&Bitmap);
int Surface_Width	= Bitmap.bmWidth;
int Surface_Height	= Bitmap.bmHeight;

//Source DC

HDC HBitmap_dc = CreateCompatibleDC(hdc);
//select loaded bitmap ito dc.		

SelectObject(HBitmap_dc,HBitmap);

//use this to draw the bitmap to the dc for the window.

BitBlt(hdc,0,0,Surface_Width,Surface_Height,HBitmap_dc,0,0,SRCCOPY);

vboyx

May 23, 2003 at 9:28 PM

thanx, i think i got it.
but i want to do different sized menu''s
depending on screen res,user settings, etc.
so drawing it would be easier than loading it
as a bitmap.

Skizz

May 24, 2003 at 6:28 AM

Why not just use CreatePopupMenu, InsertMenuItem and TrackPopupMenuEx and let Win32 do all the hard work of drawing and sizing the menu.

Skizz

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