Visual C++ :: ImageList Create Function - Size Of Image
Jul 31, 2014
An ImageList_Create() function (see here) takes 2 parameters: cx and cy which are the width and height of each image.
Everything is good if I know in advance what size my images will have. But what if I don't?
Let's say I select 32x32 and my images are sized as 16x16. What will happen with the image list? Or my images are 48x48 and the image list should grow to accomodate the extra space. Since on Windows image list is just one big bitmap, will the height of the image list shrink/grow to 16/48 or not? Is there a way to test such behavior?
The problem I'm having is to check whether the actual images will be truncated when they are bigger that the image list initial size or not or whether I will see some extra space if the images are smaller.
The closest way I see is this function, but I am not sure its the right one to apply to the image list itself and not to the image inside the list.
How to test this properly and reliably on Windows XP+?
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Mar 11, 2014
The documentation states that "An image list is a collection of same-sized images" [URL].....
But how do I retrieve that size? I have a pointer to an empty image list. The size was set during creation, but that's out of my control.
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Jan 27, 2013
how to create, initialize, and maintain a memory device context that works as a local buffer for images? The idea is to maintain some large images in local DCs and bitmaps, and only bitblt them to screen in OnDraw().
What I did so far was was to define CDC and CBitmap objects as members of my View class, and then tried to initialize them with the sequence that begins at "// Initialize buffer". I placed that sequence in either OnInitialUpdate, or PreCreateWindow, or OnPrepareDC, or the view constructor, to no avail. The code always crashes in OnDraw, and I've noticed that the m_hDC member of myDevice is zero at that point.
Obviously, the initialization is wrong and MFC does (too many) things in the background which I'm not aware of.... My question was where can I read about that?
Code:
class CMyView : public CScrollView {
// ...
CDC myDevice;
CBitmap bmp;
CBitmap *oldbmp;
[Code] .....
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Feb 12, 2014
I have an DataURI string is
data:image/gif;base64,R0lGOD lhCwAOAMQfAP////7+/vj4+Hh4eHd3d/v7+/Dw8HV1dfLy8ubm5vX19e3t7fr 6+nl5edra2nZ2dnx8fMHBwYODg/b29np6eujo6JGRkeHh4eTk5LCwsN3d3dfX 13Jycp2dnevr6////yH5BAEAAB8ALAAAAAALAA4AAAVq4NFw1DNAX/o9imAsB tKpxKRd1+YEWUoIiUoiEWEAApIDMLGoRCyWiKThenkwDgeGMiggDLEXQkDoTh CKNLpQDgjeAsY7MHgECgx8YR8oHwNHfwADBACGh4EDA4iGAYAEBAcQIg0Dk gcEIQA7
How to get this image size with out convert string to an Image then save it to the driver ?
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Jul 3, 2014
Im trying to compare the image of a button to another image in Visual Studio like so...
//variables
Image active = Image.FromFile("C:\Users\Ethan\Desktop\StarWars Status\active.png");
Image stunned = Image.FromFile("C:\Users\Ethan\Desktop\StarWars Status\stunned.png");
[Code]...
btnStatusPlr1.Image SHOULD come back as True.Then I realized it might not be the same as setting the buttons image in the properties (Which is what i did to get the original image (the one being compared to))
I do have a feeling ive done something wrong here (Yes im a noob /> )
Variable active, is the same image as the buttons default (Well should be)
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Nov 27, 2012
Change the frame window size according to font size increases.
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Feb 1, 2013
I must take an old MFC project in VC++ 6.0 and make changes.
The problem is text size in screen is different from size in print preview.
for example with this font
Code:
CFont f50;
f50.CreateFont(100,0,0,0,FW_BOLD,0,0,0,DEFAULT_CHARSET,OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,FF_DONTCARE,"Frutiger LT Std 45 Light");
And this text
Code:
s=_T("Let's try to calculate the size of this text");
and with MM_LOMETRIC map mode
GetTextExtent() returns me:
On screen: (1595,99)
Ink printer + print preview: (1589,100)
PDFCreator + print preview: (1580,100)
comparing with screen size the height is bigger but lenght is smaller. I don't understand.
I can understand that different printers process the fonts in different way and then to have different lenghts. That's not the problem. The problem is I need to simulate in screen the same behaviour i will have on printer because these texts are being aligned in the document, and I don't want to see that the text si aligned different in text than in paper.
What can I do to render the text on screen with the same size I will have on the printer? Print preview is doing it. Should I change the font parameters? is something related with pixels per inch?
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Sep 30, 2013
I need to create a function using rot to encrypt certain strings the function begins like this
#include "encrypt.h"
std::string encrypt (std::string text, int rot) {
for (int i
and ends like this
return NULL;
}
dont need to write the string encrypted and dont need to crate a decrypt function.
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Sep 16, 2014
My assignment is use a 3D array to create an image. Use an array of the form arr[300][200][3]. For this homework, you need to use an array of the form arr[3][400][500]. It will have 400 rows and 500 columns. You need to first initialize the array as described in class and after that write the array to a ppm image file. When viewed using Gimp, it should display USM. The letters would be 200 pixels high and 100 pixels wide each. Use at least 15 pixels for the width of the stroke. Use different colors for each letter and a different color for the background.This is what I have so far.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
void initialize(unsigned char a[][200][3], int nrows, int ncols, int nc);
void printAll(unsigned char a[][200][3], int nrows, int ncols, int nc);
[code]....
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Jan 7, 2013
My setup is as follows:
There is function written C++, that must be compiled to DLL. This DLL is linked to some CAD (computer aded design) tool, that has special interface for it.
I want to add to this function some GUI (graphical user interface). So the creation of a window is necessary.
I've tried already with Win32, but without success.
The problem is that CreateWindow function requires application instance handle, that is provided by Windows itself when window is created in "normal conditions".
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Apr 2, 2013
I am trying to write a program that creates a hybrid image I've hit a roadblock early on my code throws up an unhandled exception I cant find where it goes wrong I need a fresh perspective on this. Here is my code so far
#include <iostream>
#include <cv.h>
#include <highgui.h>
#include <stdio.h>
using namespace cv;
Point P11, P12;
Point P21, P22;
[Code] .....
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Jan 26, 2015
I have an assignment where I have to create an image and output it as a .ppm file. It has to have a black background and have some letters in a different color. My professor told me that my .ppm header should have p3 600 300 255 and P6 600 300 255(what this means, think it sets up the width x height which should be 300 x 600).
This is what I have so far:
#include <iostream>
#include <fstream>
using namespace std;
int main() {
struct pixel {
unsigned char red;
[Code] ....
Problem in first for loop and what it should look like inside of the for loop, after that I should be able to figure this out... with the fstream (how to output the results in a .ppm file).
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Jan 17, 2013
If a window is created by calling Create, the function DestroyWindow must be called to destroyed it at the end?
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Jan 2, 2013
I am trying to create an array with the size of the first value of one file wich is the same of the first line because the first line only have one value. Here is how i am trying to do it ...
FILE * fich;
int test;
fich=fopen(nome_ficheiro,"r");
fscanf_s(fich,"%d",&test);
int np=test;
No*aux=primeiro;
[Code] .....
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Jun 27, 2013
i have to create a console based application in c language that can join and split bitmap images. the requirements of the application are as follows :
1. Split Image
Enter number of parts:
Enter source image path:
Enter destination folder:
2. Join Images (all images should be of same width and height)
Enter image path:
Join more Image (y/n):
3. Exit
Take care of following things:
- Application should show number of images processed while running.
- Acceptable Image format is BMP only.
- Application should give all the validations for correct image name, type, size, path, etc.
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Sep 19, 2013
how to create an unordered map of fixed size vectors?
Code:
unordered_map<string, vector<int>> x;
x["mumb 5"][7] = 65; // this does not work since my vector size is not set.
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May 29, 2013
I have to create array with size that returns from method
int val=test();
int arr[val];
int test()
{
// Some logic and getting result as 5
return 5;
}
I would like to create arr with 5. how can i do this.
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Apr 18, 2014
Working on an assignment and I've hit TWO stumbling blocks. I now have to take the first line from a .txt file and use that number to determine the size of rows to create in my program. I am using fscanf but the program hangs. How can I read in this number, store it and use it in a for loop?
The second issue is after reading this number I have to print each number in the .txt file under a different column. (Note that it skips a line after reading the row count.) The .txt file is set up as follows:
9 1 3 6 4 7 8 8 6 1
The output should look sort of like:
Number 1 3 6 4 7 8 8 6 1
Here's my attempt:
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <math.h>
typedef struct{
int number;
[Code] .......
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Oct 26, 2013
I have a struct called Array and I'm to create a function to create a dynamic array that's fill with randomly generated integers from 0 to 50 (inclusive) and a function to destroy the array for freeing its memory. Below the code that I have written so far.
Code:
* Struct */
typedef struct {int *pArray; //the dynamic array
int length; //the size of the dynamic array}Array;
/* Function to create a dynamic array */
Array *initializeArray (int length) {int i;
}
[code]....
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Sep 23, 2013
I have the raw image data and now want to convert it to PNG image. How can i do that? The raw image data is stored in a unsigned char *.
I know how to convert it to Bitmap, but how to convert it to PNG.
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Mar 20, 2014
Which command should i use for displaying a jpeg image in Visual Studio 2008 (VC++)?In the past i used LoadImage function for displaying Bitmaps.
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Jul 30, 2014
tell me the EASIEST way to create a button with an image on it.
I am not interested in using the owner draw property with CBitmapButton and then have to create a whole lot of bitmaps for all the different button states.
There must be a way to simply create an ordinary button which displays an image rather than or as well as a caption....?
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Apr 26, 2013
I have a jpg file. I have extracted the width and the length of the image. I have done that with some codes and markers. Now I need the image data starts as from that place i would like read the data and print the pixel value. I would like to display the pixels later.
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Dec 26, 2013
I am working on a Windows application using Visual Studio 2012. One of the screens have a text entry field for the user. Instead of using a standard text field control, am placing a image which looks exactly like a text field. Now what i want to do is, capture the key stroke and update this image with the characters entered by user.
The initial image shown to the user is "Blank_Text_Entry.png" and this is added to the resource as IDB_BLANK_TEXT_ENTRY.
This is a rectangular white image with dimensions 153 x 27, with a size of 250 bytes.
My goal is to be able to update this image dynamically based on key strokes by user and display it.
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Feb 19, 2013
I am currently working on problem set 4 for Harvard's online CS50 course. I am working on a program that resizes a bmp image by a factor of N. N in entered along with an in-file and out-file in a command line argument. The program needs to calculate the header file for the out-file and write it to the out-file. It then needs to actually resize the image and, again, write to the out-file.
The first question I have relates to the header file, here is my code for calculating the header file:
bi2.biHeight = bi.biHeight *n;
bi2.biWidth = bi.biWidth *n;
int padding = (4 -(bi.biWidth * sizeof(RGBTRIPLE))%4)%4;
bi2.biSizeImage = (bi2.biWidth * sizeof(RGBTRIPLE) + padding) * abs(bi2.biHeight);
bf2.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + bi2.biSizeImage;
And here is my code for writing the new header file (bi2 and bf2) to the out-file:
fwrite(&bf2, sizeof(BITMAPFILEHEADER), 1, outptr);
fwrite(&bi2, sizeof(BITMAPINFOHEADER), 1, outptr);
At this point I need to actually resize the image. As far as I can tell there are 2 ways to go about this you either have to use an array to store each line you want to print repeatedly (and then you can just write it repeatedly) OR you have to move the pointer back in the input stream and repeat the read/resize/write process each time you need to print the row.
It is this that I am stuck on, first of all, I am not sure what system would be better for resizing the image, although I am leaning towards using an array, and regardless, I don't even know where to begin when in implementing either.
So what I am asking for is, first of all, just a "double check" to make sure my header code makes sense. And second of all, a push in the right direction for actually resizing the image. Here is my complete code:
/****************************************************************************
* resize.c
*
* Resizes a BMP piece by piece, just because.
***************************************************************************/
#include
#include
#include "bmp.h"
int main(int argc, char* argv[]) {
// ensure proper usage
if (argc != 4) {
printf("Usage: copy N infile outfile
[Code]....
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Aug 2, 2013
I have created an application that has bunch of buttons on top and i want to change the image when I click on the button. But unfortunately I can't get it to work.
Here is the code:
if (serialPort1.IsOpen) {
tsbCommPortOpenClose.ToolTipText = "Open serial port";
closeCommPortToolStripMenuItem.Text = "Open serial port";
tsbCommPortOpenClose.Image = Image.FromFile("Red.bmp");
serialPort1.Close();
[Code] ....
The second one which changes the image to "image2" works fine. Here is the definition of image2:
namespace Regress;
...
private Bitmap image2;
System.Reflection.Assembly myAssembly = System.Reflection.Assembly.GetExecutingAssembly();
StreammyStream = myAssembly.GetManifestResourceStream("Regress.Sharing.gif");
image2 = new Bitmap(myStream);
When I do the same with the other image that I want to use, it won't work! I opened the project properties and added the image into the resources too, and it still doesn't work. It fails and says the file was not there. I've put a copy of the file in the root directory and one in "Resources" folder but it still doesn't work.
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