C / C++ / MFC

Help! How to convert an array to bitmap?

6-May-08 1:00

For today, I, like, think, this one will be the question of the day. What do you think? Big Grin | :-D

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: help me please

CPallini6-May-08 1:04

CPallini

6-May-08 1:04

Oh, there are always surprises here, keep on charging your CPMRU's battery pack.
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: help me please

sofia_1116-May-08 5:37

sofia_111

6-May-08 5:37

thank you
i wrote this in early time but did'nt work
now is working
Blush | :O

npkinh6-May-08 0:30

npkinh

6-May-08 0:30

I have a bitmap with 256 colors. I have converted this image into an array. That's OK! Then I change some values in this array. The problem is: how can I convert this array back to bitmap? (in the same size, just some pixel colors changed)
I use VC6++. Please help!

Good luck

ThatsAlok6-May-08 0:35

ThatsAlok

6-May-08 0:35

instead of changing value of pixel in array.. directly change values at DC and save it!

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npkinh6-May-08 1:00

npkinh

6-May-08 1:00

No. that's not I want. I want to control the pixel values changed.
For ex, ALL value = 1 will be changed into 10. And I want to see the result of changing.
Is there any software can do that? I mean, I can choose the value to change and I can see the result. If not, please help me to solve my problem.

Thanks for your reply.

Good luck

Nelek6-May-08 2:02

Nelek

6-May-08 2:02

Then I would use a splitter to make 2 or 3 different views, in one of them you have the "before" bitmap, in another one you have the "after" bitmap and in the third (or just together with the first) the controls to change the colours. Two different arrays, two different dc's, two different bitmaps...

Is that what you mean?

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--------
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If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
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How to Convert Local time to UTC Time in WM5.0 [modified]

Mark Salsbery6-May-08 5:11

Mark Salsbery

6-May-08 5:11

What do you mean by "bitmap"? there's lots of different ways to represent
bitmap images Smile | :)

If you meant a Windows DDB bitmap (HBITMAP), then you could use a DIBSection.
A DIBSection gives you all the features of a device independent bitmap (DIB) through
a HBITMAP, along with a pointer to the pixel data bits, which you can work with directly.

Here's an example with a grayscale color table:

LONG lImageWidth = 640;
LONG lImageHeight = 480;
WORD wBitsPerPixel = 8;

LONG lBytesPerRow = (((lImageWidth * (long)wBitsPerPixel + 31L) & (~31L)) / 8L);

BITMAPINFO *bm = (BITMAPINFO *)new BYTE[sizeof(BITMAPINFO) + 255 * sizeof(RGBQUAD)];

bm->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bm->bmiHeader.biWidth = lImageWidth;
bm->bmiHeader.biHeight = lImageHeight;
bm->bmiHeader.biPlanes = 1;
bm->bmiHeader.biBitCount = wBitsPerPixel;
bm->bmiHeader.biCompression = BI_RGB;
bm->bmiHeader.biSizeImage = 0;
bm->bmiHeader.biXPelsPerMeter = 0;
bm->bmiHeader.biYPelsPerMeter = 0;
bm->bmiHeader.biClrUsed = 0;
bm->bmiHeader.biClrImportant = 0;

for (int color_index = 0; color_index < 256; color_index++)
{
    bm->bmiColors[color_index].rgbBlue = color_index;
    bm->bmiColors[color_index].rgbGreen = color_index;
    bm->bmiColors[color_index].rgbRed = color_index;
    bm->bmiColors[color_index].rgbReserved = 0;
}

BYTE *pBitmapBits;
HBITMAP hBitmap = ::CreateDIBSection(NULL, bm, DIB_RGB_COLORS, (void**)&pBitmapBits, NULL, 0);

if (hBitmap)
{
    // do something with the DIBSection

    ::DeleteObject(hBitmap);
}

delete[] (BYTE *)bm;

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Mohanraj D6-May-08 0:14

Mohanraj D

6-May-08 0:14

hi,

i have a code in win32 platform in Vc8 using gmtime to convert localtime to UTC time. but when i was converting the VC8 code to Win Mobile it gives some error. i have tried the localtime to filetime and also it gives a wrong answer.

thanks in advance
Mohanraj D

RAJA

modified on Tuesday, May 6, 2008 7:12 AM

perle16-May-08 1:22

perle1

6-May-08 1:22

Hi Mohanraj,

you can try this "TzSpecificLocalTimeToSystemTime" API function, but I'm not sure if available in WM5. D'Oh! | :doh:

Re: How to Convert Local time to UTC Time in WM5.0 [modified]

Mohanraj D6-May-08 1:36

Mohanraj D

6-May-08 1:36

but i want to change from system time to file time, which is then converted to UTC Time. the answer does'nt help me.

thanks,
Mohanraj D

RAJA

Rajkumar R6-May-08 1:55

6-May-08 1:55

Mohanraj D wrote:
but i want to change from system time to file time

[Windows Mobile Version 5.0 SDK Time Functions^]

[SystemTimeToFileTime^] [LocalFileTimeToFileTime^]

Try on [Mobile Development discussions^]

modified on Tuesday, May 6, 2008 8:07 AM

Rajesh R Subramanian6-May-08 2:03

6-May-08 2:03

Mohanraj D wrote:
but when i was converting the VC8 code to Win Mobile it gives some error.

It should give you a linking error. Because, gmtime, simply isn't available on Windows Mobile. You might want to try what is suggested by our friend, Raj Kumar.

A 'C' question asked in the Visual C++ forum:
Title: please stomuch me
if i have
string s[7];
s[1]="hello"
...
s[7]="how are you"
can i trace s[1] by loop and select specified item as example i, want to select e from s[1]="hello"..... the question is : this process possible or impossible!? I hope help me.......thanks - sofia_111

Rajkumar R6-May-08 2:10

6-May-08 2:10

Rajesh R Subramanian wrote:
A 'C' question asked in the Visual C++ forum:
Title: please stomuch me
if i have
string s[7];

it must be a C++ question dude (string class)

Rajesh R Subramanian6-May-08 2:11

6-May-08 2:11

No. You missed the stomuch me part. It's a C question therefore.

A 'C++' question asked in the Visual C++ forum:
Title: please stomuch me
if i have
string s[7];
s[1]="hello"
...
s[7]="how are you"
can i trace s[1] by loop and select specified item as example i, want to select e from s[1]="hello"..... the question is : this process possible or impossible!? I hope help me.......thanks - sofia_111

Compress Drive

john56325-May-08 23:54

john5632

5-May-08 23:54

Hi,

I opened a file that is in Compress Drive (NTFS). But if I overwrite this file then file system allocates different cluster to it and the original data is on actual cluster that were originally allocated to it.

How could I overwrite the file?

Re: Compress Drive

toxcct6-May-08 0:04

toxcct

6-May-08 0:04

why do you need this raw level access ?

the OS already handles this by itself, so why do you bother ?

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Compress Drive

Rajesh R Subramanian6-May-08 0:22

6-May-08 0:22

Will FlushFileBuffers() be of any help to you?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: Compress Drive

Rajkumar R6-May-08 0:42

SendMessage compatible with DLL

6-May-08 0:42

from the previous post it seems you want permanent unrecoverable file delete, i think you must be interested in [How Sysinternals' sdelete works^]

it says
"To handle these (Compressed, encrypted and sparse) types of files SDelete relies on the defragmentation API[^]. Using the defragmentation API, SDelete can determine precisely which clusters on a disk are occupied by data belonging to compressed, sparse and encrypted files. Once SDelete knows which clusters contain the file's data, it can open the disk for raw access and overwrite those clusters."

tony_Udz5-May-08 23:46

tony_Udz

5-May-08 23:46

Hello,

I am trying to 'SendMessage' thru a DLL, can i do this?
i Have written following code in DLLMain
===================================================================
AppLog *app = new AppLog;
if(!app)
return TRUE;

wcscpy(app->strAppName,strTemp);

COPYDATASTRUCT cpd;
cpd.cbData = sizeof(AppLog);
cpd.dwData = 0;
cpd.lpData = (PVOID)app;

MessageBox(NULL,app->strAppName , L"Copied exe Name", 0);

BOOL bRet = SendMessage(hCompactEngine, WM_COPYDATA, (WPARAM)1, (LPARAM)&app);
DWORD dwret = GetLastError();

===================================================================
Here dwret = 120 (This function is not supported on this system.)

Can anybody help me with this. Am i missing anything.

Re: SendMessage compatible with DLL

Rajkumar R6-May-08 3:55