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  • The simplest way to resize an UIImage ?

    - by micropsari
    Hello ! In my iPhone app, I take a picture with the camera, then I want to resize it to 290*390 pixels. I was using this method to resize the image : UIImage *newImage = [image _imageScaledToSize:CGSizeMake(290, 390) interpolationQuality:1]; It works perfectly, but it's an undocumented function, so I can't use it anymore with iPhone OS4. So... what is the simplest way to resize an UIImage ? Thanks !

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  • Scraping data from Flash (Games)

    - by awegawef
    I saw this video, and I am really curious how it was performed. Does anyone have any ideas? My intuition is that he scraped pixels from the screen (one per 'box'), and then fed that into some program to determine the next move. Is scraping pixel-by-pixel the way to do this, or is there a better way? I am looking to do something similar with either Java or Python. Thanks

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  • On OSX, how do I gradient fill a path stroke?

    - by Emiel
    Using the plethora of drawing functions in Cocoa or Quartz it's rather easy to draw paths, and fill them using a gradient. I can't seem to find an acceptable way however, to 'stroke'-draw a path with a line width of a few pixels and fill this stroke using a gradient. How is this done?

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  • IE6 and IE7 Input padding CSS

    - by Podlsk
    I have input boxes with a height of 25 pixels. In Firefox, Safari and IE8 automatically vertically align the text of it in the middle correctly. However in IE6 and IE7 the text is aligned to the top. How may I resolve this? Adding padding-top increased the total height of the input as I have explicitly declared its height. I don't wish to use browser specific CSS. Thanks.

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  • Percentage of white pixel

    - by AZIRAR
    After performing processing I want to calculate the percentage of white pixels between this images after the change. I'm doing this: var = (int2str(nnz(Img2)) / int2str(nnz(Img1))) * 100; but it returns as result ] What's the problem ?

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  • Is displayMetrix xdpi and ydpi accurate?

    - by oddvark
    Can the xdpi and ydpi settings be relied upon to accurately represent the physical pixels in once inch of screen space? I need this to be accurate for some display code I'm writing. I realize the documention says that this is the case, but I need to know if individual handsets get this right MOST OF THE TIME. I know I can alternately use "densitiy" which will give me 120, 160, 240 steps of DPI, but an exact dpi would be much better. Thanks!

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  • How to convert a fixed height/width-fixed layout to elastic?

    - by phretor
    I used the same software used here http://us.gn.bartal.org/ to create a fixed width/height treemap in HTML + CSS. I would like to make it elastic by having a JavaScript function to convert all pixels absolute positions and sizes to percentages. How would you suggest to proceed? Is there some jQuery/Prototype/Dojo magic that I can exploit?

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  • How to handle different screen resolution /screen size when developing a site ?

    - by Misha Moroshko
    I would like to develop a site using jQuery that will work with all major browsers. I thought to start with a basic layout (a header, a couple of tabs with content, and footer). I wonder how should I create this layout to support different screen resolution, screen size, or window size. Should I work in pixels / points / percents when defining width and height of the components ? Are there any jQuery plugins that can help me with this task ? Thanks !

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  • CSS Margin problem

    - by amitairos
    I'm starting out in HTML and CSS. I have a div element on the page, which doesn't fill the whole page. In it- there's a ul element and some list items in it. I want to put the list 227px from the top of the div element, but I can't manage to accomplish this- it pushes it more. Also- between the list items I want a margin of 40 pixels, but it also does more. What's the problem? Here's my code: Html: <body> <div class="Hashta"> <div class="Menu"> <ul id="MenuItems"> <li><a href="#" >ONE</a></li> <li><a href="#" >TWO</a></li> <li><a href="#" >THREE</a></li> <li><a href="#" >FOUR</a></li> </ul> </div> </div> </body> CSS: body { background-color: Gray; } .Hashta{ width:874px; height:650px; background-color:black; margin: auto auto 50px auto; border-radius: 20px; border: 3px solid darkgray; moz-box-shadow: 2px 2px 10px black; webkit-box-shadow: 2px 2px 10px black; box-shadow: 2px 2px 10px black; } .Menu { margin-top: 227px; padding-right: 50px; float:right; } #MenuItems { list-style:none; } #MenuItems li { text-align:center; position:relative; padding: 4px 10px 4px 10px; margin-right:30px; margin-bottom: 40px; border:none; } #MenuItems li a{ width: 280px; height: 70px; background-color: green; color:White; font-family:Arial, Helvetica, sans-serif; font-size:24px; display:block; outline:0; text-decoration:none; text-shadow: 1px 1px 1px #000; line-height: 70px; } If you want to measure the pixels- you can install this: http://www.mioplanet.com/products/pixelruler/ (click to rotate) Thanks!

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  • Using imtophat in Matlab

    - by jaff12
    I'm trying to do top hat filtering in matlab. The imtophat function looks promising, but I have no idea how to use it. I dont have a lot of work with Matlab before. I am trying to look find basically small spots several pixels wide that are local max in my 2 dimensional array.

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  • Editing an UIImage

    - by wwrob
    I have an UIImage that I want to edit (say, make every second row of pixels black). Now I am aware of the functions that extract PNG or JPEG data from the image, but that's raw data and I have no idea how the png/jpeg files work. Is there a way I can extract the colour data from each pixel into an array? And then make a new UIImage using the data from the array?

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  • How do I make a form transparent while keeping the controls fully visible?

    - by Power-Mosfet
    I would like to have a form in which the controls on the form are fully visible but the form itself is invisible. If I change the form's Opacity, this makes both the form and the controls on it semi-transparent, so this doesn't work. I can't do this by setting the form's TransparencyKey, since I have a PictureBox on the form. If the image in the PictureBox happens to contain pixels that match the TransparencyKey, they appear as openings in the form, which I don't want.

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  • How do you draw a string centered vertically in Java?

    - by Paul Alexander
    I know it's a simple concept but I'm struggling with the font metrics. Centering horizontally isn't too hard but vertically seems a bit difficult. I've tried using the FontMetrics getAscent, getLeading, getXXXX methods in various combinations but no matter what I've tried the text is always off by a few pixels. Is there a way to measure the exact height of the text so that it is exactly centered.

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  • Monochrome BitMap Library

    - by Asad Jibran Ahmed
    I am trying to create a piece of software that can be used to create VERY large (10000x10000) sized bitmaps. All I need is something that can work in monochrome, since the required output is a matrix containing details of black and white pixels in the bitmap. The closest thing I can think of is a font editor, but the size is a problem. Is there any library out there that I can use to create the software, or will I have to write the whole thing from the start?

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  • How much time do PHP/Python/Ruby *programmers* spend on CSS?

    - by gavin
    Not sure about you guys, but I detest working in CSS. Not that it is a bad language/markup, don't get me wrong. I just hate spending hours figuring out how to get 5 pixels to show on every browser, and getting fonts to look like a PSD counterpart. So a question (or two) for programmers out there. How much time (%) do you spend on web markup? Do you tend to do this type of tweaking, or do your designers?

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  • OpenGL Coordinate system confusion

    - by user146780
    Maybe I set up GLUT wrong. Basically I want verticies to be reletive to their size in pixels. Ex:right now if I create a hexagon, it hakes up the whole screen even though the units are 6. #include <iostream> #include <stdlib.h> //Needed for "exit" function #include <cmath> //Include OpenGL header files, so that we can use OpenGL #ifdef __APPLE__ #include <OpenGL/OpenGL.h> #include <GLUT/glut.h> #else #include <GL/glut.h> #endif using namespace std; //Called when a key is pressed void handleKeypress(unsigned char key, //The key that was pressed int x, int y) { //The current mouse coordinates switch (key) { case 27: //Escape key exit(0); //Exit the program } } //Initializes 3D rendering void initRendering() { //Makes 3D drawing work when something is in front of something else glEnable(GL_DEPTH_TEST); } //Called when the window is resized void handleResize(int w, int h) { //Tell OpenGL how to convert from coordinates to pixel values glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); //Switch to setting the camera perspective //Set the camera perspective glLoadIdentity(); //Reset the camera gluPerspective(45.0, //The camera angle (double)w / (double)h, //The width-to-height ratio 1.0, //The near z clipping coordinate 200.0); //The far z clipping coordinate } //Draws the 3D scene void drawScene() { //Clear information from last draw glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); //Reset the drawing perspective glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); glBegin(GL_POLYGON); //Begin quadrilateral coordinates //Trapezoid glColor3f(255,0,0); for(int i = 0; i < 6; ++i) { glVertex2d(sin(i/6.0*2* 3.1415), cos(i/6.0*2* 3.1415)); } glEnd(); //End quadrilateral coordinates glutSwapBuffers(); //Send the 3D scene to the screen } int main(int argc, char** argv) { //Initialize GLUT glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH); glutInitWindowSize(400, 400); //Set the window size //Create the window glutCreateWindow("Basic Shapes - videotutorialsrock.com"); initRendering(); //Initialize rendering //Set handler functions for drawing, keypresses, and window resizes glutDisplayFunc(drawScene); glutKeyboardFunc(handleKeypress); glutReshapeFunc(handleResize); glutMainLoop(); //Start the main loop. glutMainLoop doesn't return. return 0; //This line is never reached } How can I make it so that a polygon of 0,0 10,0 10,10 0,10 defines a polygon starting at the top left of the screen and is a width and height of 10 pixels? Thanks

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  • Blackberry (Java) - Setting scrolling be not focused on objects on the screen

    - by paullb
    I have a mainscreen which currently scrolls (and I have the arrows on the right) but the scrolling seems to be focused on the ButtonField objects that I have on the page. Is there any way to set the scrolling to be non-focused scrolling (moving a few pixels each time). Is there a way to set this? Other ideas I have had (which sound hacky so I want to avoid): - Placing NullFields around to scroll - Manually listening to the trackwheelRoll event and moving appropriately

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