C / C++ / MFC Discussion Boards

Re: WM_NCHITTEST and borders

Nibu babu thomas23-Mar-06 18:34

Nibu babu thomas

23-Mar-06 18:34

WM_NCMOUSEMOVE

Nibu thomas
Software Developer

GDI+ problem

anton_prokofyev23-Mar-06 4:07

anton_prokofyev

23-Mar-06 4:07

Hello Everybody!
I'v got a following problem.

I have an bmp image.
With a help of GDI+ function I conver it to tiff file (pure C++ code).

Everything worked, but the problem that generated tiff file has 96 dpi
resilution, when I want 300 dpi.

Is enybody know the way how to specify resolution in GDI+
when converting images?

Re: GDI+ problem

PJ Arends23-Mar-06 6:50

PJ Arends

23-Mar-06 6:50

I am assuming that you are using Image::Save() method to save your tiff file. Have a look at the encoderParams parameter. I would start by reading http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdicpp/GDIPlus/usingGDIPlus/usingimageencodersanddecoders.asp[^].

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

Re: GDI+ problem

anton_prokofyev23-Mar-06 20:13

anton_prokofyev

23-Mar-06 20:13

I've looked at MS documentataion and have found only folowing 3 parameters:
//=========================================
TIFF encoder parameter Allowable values:
- Compression EncoderValueCompressionLZW
- EncoderValueCompressionCCITT3
- EncoderValueCompressionCCITT4
- EncoderValueCompressionRle
- EncoderValueCompressionNone

ColorDepth : 1, 4, 8, 24, 32
SaveFlag : EncoderValueMultiFrame
//=================================

Nothing about dpi Frown | :(

Re: GDI+ problem

anton_prokofyev23-Mar-06 21:36

anton_prokofyev

23-Mar-06 21:36

I've solved the problem!

The Idea is using Gdiplus:: Bitmap
instead of Gdiplus::Image
In this case there is a function Bitmap->SetResolution(REAL x, REAL y)
that allow to do it. Smile | :)

How can I pass an array as a function parameter?

Cristoff23-Mar-06 2:51

Cristoff

23-Mar-06 2:51

here is what I want to do:

I want to swap the some elements of an array so I want to make a function like that:

int arr[] // this array is initialized

...

swap( int a[])
{
//swap parameters
}

swap(arr); // use the function

printarr(arr); // print the resault

The question is: how should I pass the array to the function properly, so that it changes the values of arr outside of its body too?

Re: How can I pass an array as a function parameter?

toxcct23-Mar-06 3:03

toxcct

23-Mar-06 3:03

void swap (int* array) { /*...*/ }

Re: How can I pass an array as a function parameter?

Waldermort23-Mar-06 3:05

Waldermort

23-Mar-06 3:05

Pass the array as a pointer.

void SwapArrayVals(int iVals[],int size){
    // your code here
}

and to call the function

int iData[2] = {11,22};
SwapArrayVals(iData,2);

int iData[2] = {11,22};
SwapArrayVals(&iData[0],2);

Also, it's not always necassary to pass the array size, but it is good practice and avoids writing outside your array.

Re: How can I pass an array as a function parameter?

Cedric Moonen23-Mar-06 3:15

Cedric Moonen

23-Mar-06 3:15

Also, it could be interesting to have a look at the containers (particularly the vector) of the standard template library (STL). Basically, it will help you to maintain arrays that can be resized easily, ...

Thank you!

Cristoff23-Mar-06 3:30

Cristoff

23-Mar-06 3:30

It's now working!

Bitmap

srija23-Mar-06 2:50

srija

23-Mar-06 2:50

Hello all,
Am newly working with bitmap, i do have many questions regarding this.
At present am working on Visual C++, but am devolping code in C without any dialog based(No GUI), just with CLASS view and FILE view, am almost finished with the work, but the problem, now i have to open a bitmap to plot the output data on the bitmap.
Is it possible to create a Bitmap in C or should i use VC++ dialog based application only? Is there any special function?

Re: Bitmap

Waldermort23-Mar-06 2:58

Waldermort

23-Mar-06 2:58

Its possible to open a bitmap the same as any other "text" file. You can also use the CreateBitmap() LoadBitmap() ... functions, but I think these require that you include windows.h or at least GDI.h into your project.

I'm not sure exactly what you are rying to do, but if you do some research about DI (Device Independant) Bitmaps, these allow you to manipulate each pixel in the structure.

Re: Bitmap

srija24-Mar-06 1:24

srija

24-Mar-06 1:24

hello,
#include "windows.h"
#include "windgi.h"
#include "GDI.h"
CreateBitmap(100,100,256,16,const void*lpvbit);

am getting an error as "cannot open GDI.h"
what could be the reason?

Re: Bitmap

chaitanya2223-Mar-06 3:03

chaitanya22

23-Mar-06 3:03

Are u working on WIN32 console application?

Re: Bitmap

srija24-Mar-06 1:24

srija

24-Mar-06 1:24

ya, this is win32 console application.

Re: Bitmap

Maximilien23-Mar-06 3:36

Maximilien

23-Mar-06 3:36

srija wrote:
Is it possible to create a Bitmap in C or should i use VC++ dialog based application only? Is there any special function?

Yes, you can create a bitmap in Plain Old C. Have a look at all the bitmap structures in MSDN.

But what are you wanting to do with the bitmap you created ?if your program only read data and create the bitmap manually, and save it back to a file, you can use paint.exe ( or any other bitmap/image viewer ) to see the resulting image.

Maximilien Lincourt
Your Head A Splode - Strong Bad

bmp DLL

srija24-Mar-06 1:28

srija

24-Mar-06 1:28

am having bitmap DLL, but it is based on MFC? how could i use for Visual C?

How to create an AVI file from images

kflrei23-Mar-06 2:41

kflrei

23-Mar-06 2:41

Hi!

I extracted alot of images from a mpg file.I want to create
an avi file from these images but I don't know how.

Can any one help me?!!!

Thank!!!

boot time detection

emmi23-Mar-06 2:38

emmi

23-Mar-06 2:38

hi, how can i detect the last start of my windows (date and time)

is there a function or a reg-key available ?

best regards

emmi

Re: boot time detection

PJ Arends23-Mar-06 6:54

PJ Arends

23-Mar-06 6:54

GetTickCount()

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

Re: boot time detection

Alexander ^M.,23-Mar-06 10:08

Alexander ^M.,

23-Mar-06 10:08

GetTickCount() won't work for servers which have a very long uptime. You could also use QueryPerformanceCounter, which normally has a much bigger time range.

Don't try it, just do it! Wink | ;-)

Month Calander

mcsherry23-Mar-06 2:25

mcsherry

23-Mar-06 2:25

Please can you tell me how you get the currrently selected date from this control? all I seem to be able to get is the current date.

thanks,

Re: Month Calander

Ștefan-Mihai MOGA23-Mar-06 2:58

Ștefan-Mihai MOGA

23-Mar-06 2:58

CDateTimeCtrl::GetTime(...) should return the selected date and time. Good luck!

Re: Month Calander

mcsherry23-Mar-06 3:05

mcsherry

23-Mar-06 3:05

cheers for your fast reply!

Andy,

Scrolling issue

anilksingh23-Mar-06 2:21

anilksingh

23-Mar-06 2:21

By Scrolling half of the scroll i want the complete page scroll.
when the scrollbar is at the middle the page should display bottom.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.