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  • Rendering splash screen on the iPhone using Open GL ES

    - by Rich
    Hi, I want to render a splash screen on the iPhone whilst using an Open GL view. The iPhone screen as we know is 320x480, which is not a power of 2. Before I enter into the world of chopping the texture up and rendering sub parts, or embedding the screen on another texture page I was wondering if there was another way? Is it possible to overlay another view that I could render to using CoreGraphics functions? Or is it possible to render to a Open GL surface using Core Graphics functions. What would you recommend? Cheers Rich

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  • Form invalidate() in c sharp windows Application

    - by Pramodh
    hi, i need to animate an object in c sharp windows application int l_nCircleXpos = 9, l_nCircleYpos = 0; private void Form1_Paint(object sender, PaintEventArgs e) { Graphics l_objGraphics = this.CreateGraphics(); Pen l_circlePen = new Pen(Color.Blue); SolidBrush l_circleBrush = new SolidBrush(Color.Blue); l_objGraphics.DrawEllipse(l_circlePen, l_nCircleXpos, l_nCircleYpos, 30, 30); l_objGraphics.FillEllipse(l_circleBrush, l_nCircleXpos, l_nCircleYpos, 30, 30); Pen l_rectPen = new Pen(Color.Red); } private void timer1_Tick(object sender, EventArgs e) { l_nCircleXpos++; l_nCircleYpos++; } private void timer2_Tick(object sender, EventArgs e) { Invalidate(); } but in timer2 its invalidating the entire form. i need to invalidate the specific circle area only. please help to do this in a better way thanks in advance

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  • Is is possible to make a shaped, alpha-blended dialog?

    - by jgaa
    I'm making a non-rectangular dialog, modelled over an image from Photoshop (the image is the background of the dialog, and the user will see trough the transparent part of the image). I'ts like a dashboard-style window for a media-app with a few custom-drawn controls. Most of the background-image is either opaque or 100% transparent - but in between there is a thin area of partially transparent pixels, ment to blend the image smootly into the background. This works great for web-graphics, but I have not found a way to make this work for Windows windows. I'm using the Windows Template Library (WTL), msvc 2008 - and the app must run on Windows XP as well as Vista and Windows 7. Currently, I'm simply using the opaque part of the background-image to create a GDI clipping-region, but this gives pretty rough edges. Does anyone know about any API functions to accomplish this (part of WTL, or reachable from WTL)?

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  • How are operating Systems created? Which language is chosen for coding?

    - by Nitesh Panchal
    Hello, How is a basic OS created? In which language do programmers code for OS? C or Assembly? or which? Also, Assembly has limited instruction set like mov etc. So how can anybody create OS in assembly? and even C has limited functionality. But it is said to be the mother of all languages. How can anybody create a full OS with stunning graphics in C? It's simply out of my mind. And what is time duration it takes for a very basic OS to be created? unlike Windows 7 :p

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  • X11 and ARGB visuals: does DefaultDepth() never return 32?

    - by Andy
    Hi, I'm establishing a connection to the X server like this: display = XOpenDisplay(NULL); screen = DefaultScreen(display); depth = DefaultDepth(display, screen); I'm wondering now why "depth" is always set to 24. I would expect that it is only 24 when compositing is turned off, but in fact, it is still 24 even when I turn on compositing. So in order to get a 32-bit ARGB visual I need to call XGetVisualInfo() first with depth set explicitly to 32. Now to my question: Will DefaultDepth() generally never return more than 24 or is it just on my system? (my graphics board is somewhat dated...). I know that it could return 15, 16 or even 8 for a CLUT display but can it return 32? Or do I always have to use XGetVisualInfo() first to get a ARGB 32-bit visual? Thanks, Andy

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  • How to rotate an image properly in JPanel (Java)

    - by Bruce
    Hi guys, I'm working on rotating a loaded image. I set the graphics on a JPanel and then use standard AffineTransform in order to rotate it, say, 45 degrees. Unfortunately, the image is being cut, if it exceeds the panel area. How may I force JPanel to add scrolls to itself (while loading an image file, I would like to adjust the size of JPanel by adding the scrolls, without adjusting the size of JFrame). Or, in other words, how to correctly rotate the whole image? Thank you in advance for the reply!

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  • .NET 2d library for circuit diagrams

    - by Dinah
    I want to draw and manipulate logic flow (as opposed to analog) circuit diagrams and I'm trying not to reinvent the wheel. Problems like positioning, line drawing, line crossing and connecting, path finding, rubberband lines, and drag & drop are also identical in flow charts, UML diagrams, or class diagrams so I started by viewing related topics via Google and Stack Overflow. However, the following requirements seemed to keep me from finding anything that quite fit: assuming a chip has an image with input and output stubs, the connecting lines would connect to the chip only in the exact spots of the I/O stubs the color of connecting lines are able to be set as per a chip's output Is there an existing .NET 2d graphics library that would be suitable for drawing circuit diagrams?

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  • CSS cross browser compatibility on Ubuntu

    - by bhefny
    Hello, I'm currently working in web development and my default desktop is Ubuntu and I'm kind of happy with the setup and applications I got going. But I need to test web pages for cross browser compatibility while still being on Ubuntu. I have gone through hell trying to get IE7 or IE8 (with wine) to run on ubuntu and when they finally worked they were very buggy and the graphics/scrolling was insanely slow. Of course there is the option of virtual box but again, too much GBytes just to run a small application! So to all the CSS gurus out there, how can I continue with my beloved Ubuntu and still deliver a good quality (tested) page. Thank you.

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  • Which is the UI technology of the future considering: eye-candy-effect, interactivity (gestures, voc

    - by user193655
    If you had to write a next-gen application, in which on the surface (UI) you need some "futuristic features", by considering the following aspects which is the choice you'd make? 1) eye-candy: cool UI, 3D, Effects, nice graphics, sound transitions... 2) user interaction: not only mouse and keyboard but touch, voice and more.... + user interactivity aspect, which is the technology you'd choose? 3) X-platform: this is to have some X-platform discussion. Of course single platform technologies (as WPF) have may be some more power, anyway in a general discussion considering X-platform as a resource is important 4) available components: of course the coolest technology with no available components is may be an option for a component developer but not for an application developer My question is generic, but anyway * have in mind data-driven apps, not pure multimedia apps, videogames, ....

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  • Creating a Java platform game as easily as possible

    - by directx
    I need to create a Java-based platformer game for a high school project (not computer science related), and I want to spend as little time on technical stuff as possible. I'm already experienced in Java, and I already have most of the gameplay, graphics, etc. All I need to do is code it. I've looked and I'm considering one of two options that do not involving coding a game from scratch: Copy an existing Java platformer (best option, but I can't find an open source Java platformer) Use a Java game engine to avoid coding from scratch. I've looked at JGame but I'm not sure if it's the best bet for a platformer.

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  • int cannot be dereferenced

    - by Overlord
    Hello, I am beginning in java (I'm learning in microedition) and I got this error: "int cannot be dereferenced" in the following class: class DCanvas extends Canvas{ public DCanvas(){ } public void drawString(String str, int x, int y, int r, int g, int b){ g.setColor(r, g, b); //The error is here g.drawString(str, x, y, 0); //and here } public void paint(Graphics g){ g.setColor(100, 100, 220); g.fillRect(0, 0, getWidth(), getHeight()); } } What am I doing wrong here? Well I came from PHP and ECMAScripts where I was able to pass my function arguments this way so I really don't understand this error.

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  • Catching KeyboardInterrupt when working with PyGame

    - by Sebastian P.
    I have written a small Python application where I use PyGame for displaying some simple graphics. I have a somewhat simple PyGame loop going in the base of my application, like so: stopEvent = Event() # Just imagine that this eventually sets the stopEvent # as soon as the program is finished with its task. disp = SortDisplay(algorithm, stopEvent) def update(): """ Update loop; updates the screen every few seconds. """ while True: stopEvent.wait(options.delay) disp.update() if stopEvent.isSet(): break disp.step() t = Thread(target=update) t.start() while not stopEvent.isSet(): for event in pygame.event.get(): if event.type == pygame.QUIT: stopEvent.set() It works all fine and dandy for the normal program termination; if the PyGame window gets closed, the application closes; if the application finishes its task, the application closes. The trouble I'm having is, if I Ctrl-C in the Python console, the application throws a KeyboardInterrupt, but keeps on running. The question would therefore be: What have I done wrong in my update loop, and how do I rectify it so a KeyboardInterrupt causes the application to terminate?

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  • Image not loading onto JPanel?

    - by None None
    I have been trying to figure out how to add an image to a JPanel as a background, but still have complete control over the placing of JButtons, JLabels, and etc. This is one method I found, but it is crashing and not loading the image or buttons. Here is the code: import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JButton; import java.awt.BorderLayout; import java.awt.FlowLayout; import java.awt.GridLayout; public class PanelDemo extends JFrame { private static final long serialVersionUID = 1L; private JButton btn1 = new JButton("EASY"); private JButton btn2 = new JButton("MEDIUM"); private JButton btn3 = new JButton("HARD"); private JButton btn4 = new JButton("High Score"); public PanelDemo() { super("Image Panel Demo"); JPanel panel = new ImagePanel( new FlowLayout(FlowLayout.CENTER, 50, 180)); JPanel panelbtn = new JPanel(new GridLayout(4, 1)); btn1.setBackground(new java.awt.Color(0, 0, 0)); btn1.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn1.setForeground(new java.awt.Color(0, 255, 102)); btn2.setBackground(new java.awt.Color(0, 0, 0)); btn2.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn2.setForeground(new java.awt.Color(0, 255, 102)); btn3.setBackground(new java.awt.Color(0, 0, 0)); btn3.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn3.setForeground(new java.awt.Color(0, 255, 102)); btn4.setBackground(new java.awt.Color(0, 0, 0)); btn4.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn4.setForeground(new java.awt.Color(0, 255, 102)); panel.add(panelbtn); panelbtn.add(btn1); panelbtn.add(btn2); panelbtn.add(btn3); panelbtn.add(btn4); add(panel, BorderLayout.CENTER); setSize(640, 480); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String... args) { new PanelDemo().setVisible(true); } } ImagePanel.java import java.awt.Graphics; import java.awt.Image; import java.awt.LayoutManager; import javax.swing.ImageIcon; import javax.swing.JPanel; public class ImagePanel extends JPanel { private static final long serialVersionUID = 1L; String imageFile = "/rsc/img/background.jpg"; public ImagePanel() { super(); } public ImagePanel(String image) { super(); this.imageFile = image; } public ImagePanel(LayoutManager layout) { super(layout); } public void paintComponent(Graphics g) { ImageIcon imageicon = new ImageIcon(getClass().getResource(imageFile)); Image image = imageicon.getImage(); super.paintComponent(g); if (image != null) g.drawImage(image, 0, 0, getWidth(), getHeight(), this); } } Error: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at javax.swing.ImageIcon.<init>(Unknown Source) at ImagePanel.paintComponent(ImagePanel.java:27) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JLayeredPane.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paintToOffscreen(Unknown Source) at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source) at javax.swing.RepaintManager$PaintManager.paint(Unknown Source) at javax.swing.RepaintManager.paint(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source) at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source) at sun.awt.SunGraphicsCallback.runComponents(Unknown Source) at java.awt.Container.paint(Unknown Source) at java.awt.Window.paint(Unknown Source) at javax.swing.RepaintManager$3.run(Unknown Source) at javax.swing.RepaintManager$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.access$1000(Unknown Source) at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$200(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Also, if anyone knows of a better way to put a background image on a JPanel, pease do tell. Thank you in advance.

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  • How to add a layer to a menuitem image

    - by alexander
    I have a menuitem with an image. I want to add half-transparent layer to that image. private void menuItem1_Paint(object sender, PaintEventArgs e) { using (SolidBrush brush = new SolidBrush(Color.FromArgb(128, SystemColors.ActiveCaption))) { e.Graphics.FillRectangle(brush, e.ClipRectangle); } } My problem is = I don't know clientrectangle of that image. e.ClipRectangle - it fills whole menuitem. I want to fill only image. How ? Is there another way, maybe ?

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  • Best canvas for drawing in wxPython?

    - by Pablo Rodriguez
    I have to draw a graph of elements composing a topological model of a physical network. There would be nodes and arches, and the latter could be unidirectional or bidirectional. I would like to capture the clicking events for the nodes and the arches (to select the element and show its properties somewhere), and the dragging events for the nodes (to move them around) and arches (to connect or disconnect elements). I've done some research and I've narrowed the alternatives down to OGL (Object Graphics Library) and FloatCanvas. I would not like to go down to the DrawingContext, but it is not discarded if necessary. Which canvas option would you choose?

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  • iPhone: Custom UITableViewCell with multiple areas that respond to taps?

    - by Nick
    I've been asked to create a custom UITableViewCell with multiple areas that can be tapped. These areas won't have buttons or any graphics - they'll be invisible. 3 different methods will be called depending on which third of the cell the user taps i.e. || decrementFooCount || viewFooDetails || incrementFooCount || The cell has a few labels on it that need to be visible at all times - the fooName and fooCount. I'm thinking perhaps three hidden UIButtons over the cell? I also need to maintain the swipe to delete default behavior.

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  • Get label height for fixed width

    - by Jonas
    Is there any way I can get the height of a label, if it hypothetically had a certain width? I've been trying with control.GetPreferredSize(size) like so: Dim wantedWidth as Integer = 100 dim ctrlSize as Size = label.GetPreferredSize(new Size(wantedWidth, 0)) because I thought that setting height = 0, would indicate a free height, but the height I get is way too small. I also tried to estimate the height of the label, using Graphics.MeasureString to calculate the equivalent area of the Label dim prefWidth as Integer = 100 dim estSize as SizeF = g.MeasureString(label.Text, label.Font) dim estHeight as Integer = (Integer)(estSize.Width * estSize.Height / prefWidth) but that yields the same result. Any ideas? I'm on .NET 2.0, unfortunately.

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  • Drawing rubber band line during user drag

    - by Pete W
    In my iPhone app, I would like the user to be able to "connect" two of my views by: 1) starting a drag in View A 2) as they drag towards View B, a straight line with one end in View A and the other end under at the current drag point, animates in a rubber-band fashion 3) when/if they release in View B, the line is then shown between the two views I've seen examples of dragging and dropping views, and other examples of animations, but I haven't seen one that is a simple example of this kind of user-directed animation. Any pointers towards examples or the specific docs I should be looking at would be appreciated. If this turns out to be trivial - my apologies. Although I've done quite a bit of development, I'm just getting started in the iPhone SDK and Core Graphics.

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  • freeGLUT keyboard input

    - by peaker
    I'm using GLUT (freeglut3) (via the Haskell GLUT bindings). import Graphics.UI.GLUT handleKBMouse :: KeyboardMouseCallback handleKBMouse key keyState mods mousePos = do print (key, keyState, mods, mousePos) main :: IO () main = do getArgsAndInitialize createWindow "testTitle" keyboardMouseCallback $= Just handleKBMouse mainLoop It seems that various important keys (e.g: Shift+Tab) do not call my callback. Also, "mods" doesn't describe the win-key, only Ctrl, Shift and Alt. Having such limited access to keyboard input is a serious impediment for real application development. Am I doing anything wrong here or is just freeglut just crippled? Is GLUT crippled in general?

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  • Efficiently remove points with same slope

    - by Ram
    Hi, In one of mine applications I am dealing with graphics objects. I am using open source GPC library to clip/merge two shapes. To improve accuracy I am sampling (adding multiple points between two edges) existing shapes. But before displaying back the merged shape I need to remove all the points between two edges. But I am not able to find an efficient algorithm that will remove all points between two edges which has same slope with minimum CPU utilization. Currently all points are of type PointF Any pointer on this will be a great help.

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  • document class problem in latex

    - by laspal
    Hi, My problem is my full tables and text are coming some says 15 cm away from left side, so my text has very less space on right side says 3cm. How can I change my text and tables to start from 5 cm awayfrom left and 5 cm before right side. What all \documentclass[] {} can I try to change this format. \documentclass[a4paper]{article} \usepackage{graphics} \usepackage{color} \usepackage{hyperref} \usepackage{multirow} \usepackage{longtable} \usepackage{fullpage} \usepackage[pdftex]{graphicx} \usepackage{fancyhdr} \oddsidemargin 0cm \evensidemargin 0cm \pagestyle{fancy} \renewcommand{\headrulewidth}{0.0pt} \lfoot{%(full_name)s/%(emp_id)s/\thepage} \cfoot{} \topmargin -2.5cm \parindent 0cm \textheight 27.5cm \parskip 3mm \begin{document} \fontencoding{\encodingdefault} \renewcommand{\familydefault}{\sfdefault} \fontshape{\shapedefault} \selectfont Thanks

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  • PC reboots spontaenously: debugging tips [closed]

    - by aaron
    I swapped my core 2 duo for a quad core recently, and generally things run fine, but every now and then my computer just restarts. I don't even get a blue screen (Vista 32). Core temp isn't a problem. My thinking is that my power supply is inadequate, but I haven't been able to test that (one idea was to under clock the cpu to see if that helped, but going up in speed was the only simple thing to do in the BIOS) Two cases where I semi-consistanly get problems: - Borderlands windowed after some period of time (and some other games, but Borderlands does it pretty regularly) - watching a video (e.g. quicktime/vlc) and having another video running Another thought is non-cpu heat? Maybe the graphics card? Any thoughts on how to track this down appreciated. Thanks!

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  • Properly Repaint a Custom Control

    - by serhio
    I am doing a custom control, that should be painted like as standard one, but also having a Icon displayed near it. So, I jet overrided OnPaint like this: protected override void OnPaint(System.Windows.Forms.PaintEventArgs e) {     base.OnPaint(e);     e.Graphics.DrawIcon(theIcon, X1, Y1 - iconSize.Width / 2); } Now, everything is OK, but when my control moves, the icon still remains drawn on the ancient place. What should I add to manage it properly? In the image we can see that after moving from top to bottom the line(custom control) even is not properly redrawn. I tried to do public override void Invalidate() {     base.Invalidate();     if (Parent != null) {         Parent.Invalidate(new Rectangle( X1, Y1 - iconSize.Width / 2, iconSize.Width, iconSize.Height));     } } but this does not work - when changing location the Invalidate is not even called. If it matter the custom control inherits from VisualBasic.PowerPacks.LineShape component.

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  • MacPorts: Add an option to configure script

    - by Jeffrey Aylesworth
    I am trying to install libguichan without allegro support, because allegro will not build on Snow Leopard. It should be left out, the portfile has: 27 if {${os.platform} == "darwin" && (([variant_isset universal] && [string match *64* $universal_archs]) || (![variant_isset universal] && [string match *64 $build_arch]))} { 28 # allegro is not yet 64-bit compatible 29 depends_lib-delete port:allegro 30 configure.args-append --disable-allegro 31 } But when I install it, it tries to build allegro. Is there any way I can get this functionality from the command line to install it? The port: http://trac.macports.org/browser/trunk/dports/graphics/libguichan/Portfile

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  • OnPaint event during a callback when the form is below?

    - by Martín Marconcini
    Imagine the following scenario: this.SetStyle(ControlStyles.UserPaint, true); //this doesn’t change anything … void OpenSomeForm() { SomeForm sf = new SomeForm(); sf.SomeEvent += new … (SomeEventOcurred); sf.ShowDialog(); } private void SomeEventOcurred(…) { OnePanelInThisForm.Invalidate(); } private void OnePanelInThisForm_Paint(object sender, PaintEventArgs e) { DoSomeDrawing(e.Graphics); } Now, OnePanelInThisForm draws correctly when the form loads. But if SomeEventOcurred is Fired from “SomeForm”, the paint event is not fired. If I close and reopen the form it correctly repaints. If I add a button to the form that executes: OnePanelInThisForm.Invalidate(); the panel is correctly repaint. What am I missing?

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