C / C++ / MFC

PalBlt or FillRect.... - what is faster ?

8-Mar-02 5:17

This article has sample code.

Tomasz Sowinski -- http://www.shooltz.com

Re: Performance Counters

RobJones8-Mar-02 5:38

RobJones

8-Mar-02 5:38

Thanks Tomasz I'll take a look at that.

Rob

Wizard_018-Mar-02 4:28

Wizard_01

8-Mar-02 4:28

Do you know which function fills rect faster ?

e.g.:
CPaint dc(this);
CRect rect;
GetClientRect(rect);
// a)
dc.FillSolidRect(&rect,RGB(255,0,0));
// b)
CBrush brush(RGB(255,0,0));
CBrush * pOld = dc.SelectObject(&brush);
dc.PalBlt(0,0,rect.Width(),rect.Height(),PATCOPY);
dc.SelectObject(pOld);

Wiizi Smile | :)

Tomasz Sowinski8-Mar-02 4:39

8-Mar-02 4:39

If you look into MFC sources, you'll find that FillSolidRect internally calls ::ExtTextOut. This is probably speed optimization, so chances are that FillSolidRect may be faster.

I don't believe that difference will be visible when you just want to paint client rectangle. This could become significant with thousands of rects.

Tomasz Sowinski -- http://www.shooltz.com

Tim Smith8-Mar-02 5:03

8-Mar-02 5:03

If you look into MFC sources, you'll find that FillSolidRect internally calls ::ExtTextOut. This is probably speed optimization, so chances are that FillSolidRect may be faster.

That floored me the first time I saw it in MFC. I wonder which is faster if you already have a brush sitting around. (Being that the ::ExtTextOut method doesn't require you to create a temp brush.)

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Tomasz Sowinski8-Mar-02 5:11

8-Mar-02 5:11

For max speed, I'd go for PatBlt with BLACKNESS Big Grin | :-D

Tomasz Sowinski -- http://www.shooltz.com

Tim Smith8-Mar-02 5:12

8-Mar-02 5:12

LOL, sounds like you are trying to depress the user.

"I see a red door and I want it painted black. No colours anymore, I want them to turn black."

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Tim Smith8-Mar-02 5:10

8-Mar-02 5:10

Just looked in the google archives, it seems that even though PatBlt is VERY fast, selecting the brush into the DC can be very slow and thus makes the ::ExtTextOut the winner.

Interesting stuff.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Tomasz Sowinski8-Mar-02 5:19

8-Mar-02 5:19

To make it even more interesting, starting with 2K you can use SetDCBrushColor, which is probably quite fast (compared to Create/SelectBrush).

Tomasz Sowinski -- http://www.shooltz.com

Tim Smith8-Mar-02 8:43

Too few parameters. Expexted 1!

8-Mar-02 8:43

oooooo, another learn something new every day.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

isCode8-Mar-02 4:16

isCode

8-Mar-02 4:16

Hi I have a problem
When I call this function below, I get this error:
"Too few parameters. Expected 1."
What am I doing wrong here?

Here is the function:

void CMyTreeView::FillProducts()
{
CProductSet *pSet = &(GetDocument()->m_productSet);
pSet->m_strFilter = "[Categories].[CategoryID] = [Products].[CategoryID]";

if (pSet->IsOpen())
{
pSet->Close();
}

pSet->Open();

if (pSet->IsBOF())
return;

pSet->MoveFirst();
while (!pSet->IsEOF())
{
HTREEITEM hProductNode = FindNode(NULL, pSet->m_CategoryName);
InsertNode(pSet->m_ProductName, hProductNode);

pSet->MoveNext();
}
}

Here is the CProductSet:

void CProductSet::DoFieldExchange(CFieldExchange* pFX)
{
//{{AFX_FIELD_MAP(CProductSet)
pFX->SetFieldType(CFieldExchange::outputColumn);
RFX_Long(pFX, _T("[Categories].[CategoryID]"), m_CategoryID);
RFX_Text(pFX, _T("[CategoryName]"), m_CategoryName);
RFX_Long(pFX, _T("[ProductID]"), m_ProductID);
RFX_Text(pFX, _T("[ProductName]"), m_ProductName);
RFX_Text(pFX, _T("[ProductDescription]"), m_ProductDescription);
RFX_Long(pFX, _T("[Products].[CategoryID]"), m_CategoryID2);
RFX_Text(pFX, _T("[SerialNumber]"), m_SerialNumber);
RFX_Text(pFX, _T("[UnitSellingPrice]"), m_UnitSellingPrice);
RFX_Text(pFX, _T("[UnitCostPrice]"), m_UnitCostPrice);
RFX_Long(pFX, _T("[ReorderLevel]"), m_ReorderLevel);
RFX_Long(pFX, _T("[UnitsInStock]"), m_UnitsInStock);
RFX_Long(pFX, _T("[SupplierID]"), m_SupplierID);
//}}AFX_FIELD_MAP
pFX->SetFieldType(CFieldExchange::param);
RFX_Text(pFX, "ProductNameParam", m_ProductNameparam);
}

Re: Too few parameters. Expexted 1!

8-Mar-02 4:23

Your code doesn't match your table design. I suspect that one of the fields you have coded to read from doesn't exist in your table definition. Laugh | :laugh:

scott

Re: Too few parameters. Expexted 1!

isCode8-Mar-02 4:59

isCode

8-Mar-02 4:59

Thanks scott!

I found the problem Roll eyes | :rolleyes:

Hibernation Notification

Steve Thresher8-Mar-02 3:58

Steve Thresher

8-Mar-02 3:58

The first time a programmer logs into our network they download any software updates made the previous day by the other programmers. Now I have moved from a desktop to a notebook I need to be able to run the same download program when my machine comes out of hibernation. I currently have to log off and log back on again each day which is annoying. Any information you can provide would be greatly appreciated.

Steve.

Systems AXIS Ltd - Software for Business ...

Re: Hibernation Notification

Tomasz Sowinski8-Mar-02 4:04