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  • Boggling Direct3D9 dynamic vertex buffer Lock crash/post-lock failure on Intel GMA X3100.

    - by nj
    Hi, For starters I'm a fairly seasoned graphics programmer but as wel all know, everyone makes mistakes. Unfortunately the codebase is a bit too large to start throwing sensible snippets here and re-creating the whole situation in an isolated CPP/codebase is too tall an order -- for which I am sorry, do not have the time. I'll do my best to explain. B.t.w, I will of course supply specific pieces of code if someone wonders how I'm handling this-or-that! As with all resources in the D3DPOOL_DEFAULT pool, when the device context is taken away from you you'll sooner or later will have to reset your resources. I've built a mechanism to handle this for all relevant resources that's been working for years; but that fact nothingwithstanding I've of course checked, asserted and doubted any assumption since this bug came to light. What happens is as follows: I have a rather large dynamic vertex buffer, exact size 18874368 bytes. This buffer is locked (and discarded fully using the D3DLOCK_DISCARD flag) each frame prior to generating dynamic geometry (isosurface-related, f.y.i) to it. This works fine, until, of course, I start to reset. It might take 1 time, it might take 2 or it might take 5 resets to set off a bug that causes an access violation either on the pointer returned by the Lock() operation on the renewed resource or a plain crash -- regarding a somewhat similar address, but without the offset that it has tacked on to it in the first case because in that case we're somewhere halfway writing -- iside the D3D9 dll Lock() call. I've tested this on other hardware, upgraded my GMA X3100 drivers (using a MacBook with BootCamp) to the latest ones, but I can't reproduce it on any other machine and I'm at a loss about what's wrong here. I have tried to reproduce a similar situation with a similar buffer (I've got a large scratch pad of the same type I filled with quads) and beyond a certain amount of bytes it started to behave likewise. I'm not asking for a solution here but I'm very interested if there are other developers here who have battled with the same foe or maybe some who can point me in some insightful direction, maybe ask some questions that might shed a light on what I may or may not be overlooking. Another interesting artifact is that the vertex buffer starts to bug if I supply both D3DLOCK_DISCARD and D3DLOCK_NOOVERWRITE together which, even though not very logical (you're not going to overwrite if you've just discarded all), gives graphics glitches. Thanks and any corrections are more than welcome. Niels p.s - A friend of mine raised the valid point that it is a huge buffer for onboard video RAM and it's being at least double or triple buffered internally due to it's dynamic nature. On the other hand, the debug output (D3D9 debug DLL + max. warning output) remains silent. p.s 2 - Had it tested on more machines and still works -- it's probably a matter of circumstance: the huge dynamic, internally double/trippled buffered buffer, not a lot of memory and drivers that don't complain when they should.. Unless someone has a better suggestion; I'd still love to hear it :)

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  • jQuery delete text onfocus

    - by phillip usa
    hey, ive been trying to have a default value in a text input, then with jQuery, when you "onfocus" the textbox, it makes the text black (default a light gray), and deletes the default value. I think you know what im talking about, so do you guys know how to accomplish this?

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  • c# uploading file - error

    - by user228058
    I have a webpage where the user can upload an excel file. I'm trying 2 different files - one works without a problem, and the other one gives me this error: Error: Length cannot be less than zero. Parameter name: length I know that sometimes this occurs when the file size is zero, but that is not the case here. Can anyon shed light on this issue? Please let me know if you need more info.

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  • Specification Pattern vs Spec in BDD

    - by cadmium
    I'm trying to explore Behavior Driven Design and Domain Driven Design. I'm getting that written specifications drive the tests in BDD, but also that business logic can be encapsulated using the specification pattern for re-use in domain objects and repositories, etc. Are these basically the same concept just used in different ways, used in conjunction together, or am I completely confusing the concepts? Please shed some light, if possible.

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  • Logging and Error handling in asp.net

    - by parminder
    Hi Experts, I have a website running now. I have to implement some logging routines as well as some handler for unhandeled exceptions. I was looking at ELMAH also which seems good to me. I need something very light and easy to use. Can someone recommend any other option I can choose from. Thanks Parminder

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  • Zend Framework :: Ajax Requests

    - by dev-drupal
    Hi, I am looking out for any library that would facilitate Ajax in Zend (if any exist). Also can somebody throw some light on the built-in Ajax support that comes with ZF. I tried googling but was not satisfied with the results. -DevD

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  • Animations and MVVM in Silverlight

    - by user275561
    OK I have looked and searched all i want to do is fire a storyboard animation from my view model onto my view. The problem is there is just simply too much boilerplate code to get a simple thing like myStoryboard.Begin(); firing. So what are the methods that you use? Currently, I am using Silverlight 3, MVVM Light.

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  • What is the difference between Sprint and Iteration in SCRUM and length of each Sprint?

    - by kurozakura
    1.Is there a difference between Sprint and an Iteration or one can have Iterations within a Sprint or Sprint is just the terminology used instead of Iteration in SCRUM? It will be helpful if someone can throw some light on this. 2.Suppose there are 4 sprints and you have decided the first sprint will go up to 10days is it required that other 3 sprints should have the same length of the 1st decided sprint's length??.

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  • Why should I Use ASP.NET Membership security model?

    - by ListenToRick
    I'm updating my website at the moment and figure that if I am to update my login/security mode, now is a good time. I have looked through the Membership model which is included in ASP.NET but I'm convinced that it will provide any benefit apart from being familiar to other .NET deevlopers. There seems to be quite a lot of documentation for it, but little discussion for why its worth the effort. Can anybody shed some light upon this?

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  • What should a Django user know when moving from MySQL to PostgreSQL?

    - by tmitchell
    Most of my experience with Django thus far has been with MySQL and mysqldb. For a new app I'm writing, I'm dipping my toe in the PostgreSQL water, now that I have seen the light. While writing a data import script, I stumbled upon an issue with the default autocommit behavior. I would guess there are other "gotchas" that might crop up. What else should I be on the lookout for?

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  • Is XML a good logic to load data??

    - by Mat
    Hi stack, i'm working on an app that loads some data from xml file from internet. Is this a good way to develop iPhone apps??...I think xml is more light than SQlite database... Basically my logic is: 1 - Parsing Xml file from internet to retrive the data 2 - Load data on device Security?..other stuff??.. Thanks Mat

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  • Why do static Create methods exist?

    - by GeReV
    I was wondering, why do static Create methods exist? For instance, why use this code: System.Xml.XmlReader reader = System.Xml.XmlReader.Create(inputUri); over this code: System.Xml.XmlReader reader = new System.Xml.XmlReader(inputUri); I cannot find the rationale for using one over the other, and can't find any relation between classes who use this construct over the other. Can anyone shed some light on this?

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  • Removing input background colour for Chrome autocomplete?

    - by DisgruntledGoat
    On a form I'm working on, Chrome is auto-filling the email and password fields. This is fine, however, Chrome changes the background colour to a pale yellow colour. The design I'm working on is using light text on a dark background, so this really messes up the look of the form - I have stark yellow boxes and near-invisible white text. Once the field is focused, the fields return to normal. Is it possible to stop Chrome changing the colour of these fields?

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  • GUI development in JAVA

    - by user309281
    Hi All To build a java-based GUI using jsp and servlets, what are the different factors that go into selection of frameworks like AJAX, JSF, Struts 1/Struts 2 etc. Also for each of the above pls throw some light on, what are the libraries, toolkits and IDE which are available? Thanks.

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  • iPhone text editor syntax highlight

    - by Jack
    Hi, As the title suggests, I am trying to add a text editor with syntax highlighting to a project. I have asked a similar question before and got pointed in the direction of either: a) a UITextView and NSAttributedStrings Or b) a web view Can anyone shed some light on using either of These methods or suggest an alternative? I have searched around for a few hours now and have found nothing. Jack

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  • Show one at a time?

    - by Nightmare_IntMain
    I have a script on my website that shows messsages from a mysql database. Now I want to make it so it only pops up one message at a time. Anyone wanna shed some light on this? Windows Vista PHP - Mysql - Ajax - JS

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  • Escaped International characters?

    - by FFish
    I am looking at some PHP code where there are translation strings. For French there are characters that I have never seen before and I am asking if someone could shed a light. These strings are used as HTML output, but also as body text to send emails. È = é Ë = è ‡ = à Í = ê ...

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  • Multiline code in Word 2007

    - by WaelJ
    I am using word 2007 and am inserting code into the document. I have a style with a fixed-width font and light grey background and all, and I use Notepad++ for syntax highlighting. My problem is with a "line" of code that is too long to display, so is there a way to auto-insert an arrow symbol at the beginning of a such lines to indicate that it is the same line (kind of like hyphenating, except on long lines instead of long words) So for e.g. something like this: public static void foo(String abcdefg, Boolean 123, ?String xyz)

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  • ODBC vs MySQLClient

    - by Matt
    I'm currently using ODBC to connect to my MySQL database, using C#. I've been told that using the MySql Connector would be better, and faster, and not dependent on Windows. Can someone shed some light on this please? I've been unable to find anything on the net so far

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