C / C++ / MFC

5-Jun-02 0:46

Okay

I finally found some samples on MSDN that show how we can save an bitmap from an HBITMAP

The problem is it's saving it in 24 bits Frown | :-(

(

Is there anyway that I can change the bits/pixel setting of my DC?

Or say once I have the bitmap ready in memory, is there anyway by which I can change it from a 24 bit bitmap to a 1 bit bitmap???

Regards
Nish

p.s. only GDI, no GDI+ Cry | :((

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Tomasz Sowinski5-Jun-02 1:06

5-Jun-02 1:06

Well, you can always BitBlt from 24-bit to 1-bit memory DC. But quality will be totally unacceptable. You should perform some dithering (Floyd-Steinberg error diffusion, perhaps).

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

- It's for protection
- Protection from what? Zee Germans?

Nish Nishant5-Jun-02 1:14

5-Jun-02 1:14

Tomasz Sowinski wrote:
Well, you can always BitBlt from 24-bit to 1-bit memory DC. But quality will be totally unacceptable. You should perform some dithering (Floyd-Steinberg error diffusion, perhaps).

Quality is not a problem. The bitmap consists of just black and white.
I draw it on my CView using *blush* SetPixel Blush | :O

Here is the code I am using :-

HDC hDC;	
hDC = ::GetDC(m_hWnd); 
	
HDC hMemDC = CreateCompatibleDC(hDC);
RECT r;
::GetClientRect(m_hWnd,&r);
SIZE size;
size.cx = r.right-r.left;
size.cy = r.bottom-r.top;
	
HBITMAP hBitmap = CreateCompatibleBitmap(hDC, size.cx, size.cy);	
	

if (hBitmap)
{
	HBITMAP hOld = (HBITMAP) SelectObject(hMemDC, hBitmap);
	BitBlt(hMemDC, 0, 0, size.cx, size.cy, hDC, 0, 0, SRCCOPY);
	SelectObject(hMemDC, hOld);	
		
	if(m_hBitmap)
		DeleteObject(m_hBitmap);
		
	m_hBitmap = hBitmap;
		
	DeleteDC(hMemDC);
	::ReleaseDC(NULL, hDC);		
}

I guess I should change my CreateCompatibleDC to #CreateDCwith1Bits#!

But how do I do that? Is there any GDI function for that?

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Tomasz Sowinski5-Jun-02 1:18

5-Jun-02 1:18

If you replace hDC with hMemDC in a call to CreateCompatibleBitmap, hBitmap will be monochrome. There's some rule which GDI uses when blitting to monochrome DCs - I don't remember exactly, but it may be related to current text color. You'll have to experiment a little bit or browse through MSDN or CP.

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

- It's for protection
- Protection from what? Zee Germans?

Nish Nishant5-Jun-02 1:29

5-Jun-02 1:29

Tomasz Sowinski wrote:
If you replace hDC with hMemDC in a call to CreateCompatibleBitmap, hBitmap will be monochrome. There's some rule which GDI uses when blitting to monochrome DCs - I don't remember exactly, but it may be related to current text color. You'll have to experiment a little bit or browse through MSDN or CP.

Well, it created a 1-bit bitmap. But it was all blank Frown | :(

I dunno what kinda stupid logic it used. Basically it was a bitmap with a lot of white and a black signature. I think 99% of the area would have been white. yet I expected it to convert that properly to a 1-bit bitmap Frown | :(

Now what do I do? Confused | :confused:

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Tomasz Sowinski5-Jun-02 1:34

5-Jun-02 1:34

Nish - Native CPian wrote:
Now what do I do?

Can't you use this SetPixel stuff directly on hMemDC? It would create the same thing. Getting client DC and blitting from it isn't the best way - there may be some topmost window (WinAmp, for example) floating above, etc.

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

- It's for protection
- Protection from what? Zee Germans?

Problem with MicrosoftAccessDriver

Tim Smith5-Jun-02 1:37

Tim Smith

5-Jun-02 1:37

Set the background color of the source DC (the 24 bit bitmap) to the color of the color you want to be black in your monochrome bitmap.

::SetBkColor (hdcSrc, RGB (0, 0, 0));

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?

4-Jun-02 23:53

Hi!
I try to put MicrosoftAccessDriver version 4.00.6019.00 on Windows98 and recieve a message
The setup routines for Microsoft Access Driver ODBC driver could not be loaded due to system error code 1157.
Tell me,please,what is it means.
May be that i can not put driver with last version on Windows98 and Windows95?
Help me,please!!!

Re: Problem with MicrosoftAccessDriver

Ed Gadziemski5-Jun-02 14:13

Ed Gadziemski

5-Jun-02 14:13

Check article Q260558 on support.microsoft.com.

VisC++ and installShield

Tali4-Jun-02 23:20

Tali

4-Jun-02 23:20

Hey,
So this is what I want to do: I work for a video game company, and I am working on the installer for the game. What they want is a graphically attracting version of the installer made with installShield (you know, weapons, fires, movies, etc.). I own installShield professional 5.5, and it allows you to display movies in the background, but I want to actually customize my own dialog boxes, while still keeping the functionality of installShield. I tried to use the tutorial about adding DLL's to installShield, but I do not know how to make an MSI file in installShield, or much less what an MSI file is.

Any help would be GREATLY appreciated.

Thanks,
Tali

Re: VisC++ and installShield

Ed Gadziemski5-Jun-02 14:17

Ed Gadziemski

5-Jun-02 14:17

MSI stands for MicroSoft Installer. An .msi file is one of the files that go with the new Windows Installer. Check out msdn.microsoft.com for more info.

HBITMAP to Jpg anyone

Nish Nishant4-Jun-02 22:57

4-Jun-02 22:57

As in subject!

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

-Dy4-Jun-02 23:07

-Dy

4-Jun-02 23:07

Check out the very good Free Image Project [^]

Dylan Kenneally
London, UK

Nish Nishant4-Jun-02 23:28

4-Jun-02 23:28

Thanks. If nothing else works out, I'll have to use something like that

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Rama Krishna Vavilala4-Jun-02 23:52

Rama Krishna Vavilala

4-Jun-02 23:52

It should be possible using GDI+ if you can use it. Attach the HBITMAP to an Bitmap object and call Save method. There is a way to select the format in which you want to save.

Nish Nishant5-Jun-02 0:51

5-Jun-02 0:51

Sadly I am using VC++ 6 and I don't have the new PSDK either Frown | :-(

Sucks to be me Cry | :((

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

ISEffects - effects for images

C^hris L^osinger5-Jun-02 1:51

C^hris L^osinger

5-Jun-02 1:51

i know where you can get a nice, cheap, commercial solution Smile | :)

-c

Cheap oil. It's worth it!

Tomasz Sowinski5-Jun-02 2:26

5-Jun-02 2:26

AFAIK, Nish's bosses aren't going to buy any non-Java tools...

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

- It's for protection
- Protection from what? Zee Germans?

ISEffects - effects for images

C^hris L^osinger5-Jun-02 3:39

C^hris L^osinger

5-Jun-02 3:39

he said he was using VC6, not Java.

-c

Cheap oil. It's worth it!

Tomasz Sowinski5-Jun-02 3:43

5-Jun-02 3:43

C^hris L^osinger wrote:
he said he was using VC6, not Java

Yeah, but somewhere else he said that his company focuses on Java/Linux and they don't want to buy him Win32-related stuff.

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

- It's for protection
- Protection from what? Zee Germans?