Develop Bugs

OpenGL ES HTC TP2

I've been beating my head against the wall on this, so it's time to ask for help.
I've ported my game engine from iPhone to Windows CE (it actually started out many years ago as a WinCE engine, so I've developed it with portability in mind). I've also maintained a Windows build (full windows) all along for development.
I'm having problems initializing OpenGL ES on the HTC Touch Pro 2. Now what is maddening is that one of the builds worked fine, but I can't reproduce that success.
For starters, I'm linking to the Vincent OGLES implementation. If I use the Vincent libGLES_CM.DLL on a Dell x50v then it renders fine using software (so it's very slow - I haven't begun to see about using the GLES lite hardware implementation on that device yet). So is using the Vincent implementation without the software renderer DLL the correct method on a device like the TP2?
I tried this OpenGL ES SDK:
http://www.khronos.org/message_boards/viewtopic.php?f=11&t=1433
But it crashes on the first call to any OGLES API (eglGetDisplay). So I assume the linker lib is not mapping correctly to the TP2's DLL.
With Vincent it is failing at eglCreateContext, which returns EGL_BAD_ATTRIBUTE. If I do not specify an attribute list (which I see is how many other implementations call that routine) then it crashes. If I send an attribute array just containing EGL_NONE then it also crashes. It has to have at least one actual attribute to not crash.
I'm using attributes that are valid, and have tried many, many combinations, but it still returns EGL_BAD_ATTRIBUTE.
Any suggestions would be greatly appreciated.

Here's the code. I've tried calling eglCreateContext before and after eglCreateWindowSurface, because I've seen implementations do it both ways, but it made no difference.
Code:
g_hMainDC = GetDC(hWnd);
EGLConfig* configs = NULL;
const EGLint configAttribs[] =
{
EGL_RED_SIZE, 5,
EGL_GREEN_SIZE, 6,
EGL_BLUE_SIZE, 5,
EGL_ALPHA_SIZE, EGL_DONT_CARE,
EGL_DEPTH_SIZE, 16,
EGL_STENCIL_SIZE, EGL_DONT_CARE,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_NONE
};
glesDisplay = eglGetDisplay(g_hMainDC);
if (!glesDisplay) {
return false;
}
if (!eglInitialize(glesDisplay, NULL, NULL)) {
return false;
}
EGLint num_configs = 0;
if (!eglGetConfigs(glesDisplay, NULL, 0, &num_configs)) {
return false;
}
if (num_configs==0) {
return false;
}
configs = new EGLConfig[num_configs];
eglGetConfigs(glesDisplay,configs,sizeof(EGLConfig),&num_configs);
EGLConfig config = NULL;
if (!eglChooseConfig(glesDisplay, configAttribs, &config, 1, &num_configs)) {
return false;
}
if (num_configs==0) {
return false;
}
if (config==NULL) {
return false;
}
// Let’s create our rendering context
glesContext=eglCreateContext(glesDisplay, config, EGL_NO_CONTEXT, configAttribs);
if(!glesContext) {
return false;
}
glesSurface = eglCreateWindowSurface(glesDisplay, config, hWnd, NULL);
if (!glesSurface) {
return false;
}

Okay. Finally got a handle on this. You can't pass attributes to eglCreateContext or eglCreateWindowSurface or it will always return EGL_BAD_ATTRIBUTE. It has to be an empty array or a NULL pointer.
My app was running out of memory on the stack, and it would fail in eglCreateContext. I increased the stack size in the link settings and that fixed it. I had played around with the stack size earlier, and reverted my settings because it did not appear that had anything to do with the OGL ES initialization problems I was having.

Try to google the Xperia SDK which come with workable OpenGL ES samples.

C# Battery State

Hi Everyone,
I'm making a windows mobile app in C# to help those affected by alzheimers disease and other dimentia related conditions
One function of the app is sending SMS text messages and so I'd really like to include the battery charge percentage in each text, but I can't find how to do so!
How can I put this in my program?
Thanks!
James

Use PowerBatteryStrength of Status.SystemProperty!

I know it's something to do with
Code:
Microsoft.WindowsMobile.Status.SystemState.PowerBatteryStrength.ToString();
but beyond that I'm lost! How do I put it in to my code so that I just get the string "Battery level: 42%" for example?

Signal strenght and battery level example
Hi,
Here is a simple example on how you can use the SystemState and SystemProperties.
Hope this will help you.
Code:
using System;
using System.Windows.Forms;
using Microsoft.WindowsMobile.Status;
namespace SignalAndBatteryLevel
{
public partial class BatteryAndSignalLevel : Form
{
private readonly SystemState _signalStrenght =
new SystemState(SystemProperty.PhoneSignalStrength);
private readonly SystemState _batteryLevel =
new SystemState(SystemProperty.PowerBatteryStrength);
private readonly SystemState _batteryState =
new SystemState(SystemProperty.PowerBatteryState);
public BatteryAndSignalLevel()
{
InitializeComponent();
SetSignalStrenght();
SetBatteryLevel();
_signalStrenght.Changed +=
SignalStrenghtChanged;
_batteryLevel.Changed += BatteryLevelChanged;
_batteryState.Changed += BatteryLevelChanged;
}
private void SignalStrenghtChanged(object sender,
EventArgs e)
{
SetSignalStrenght();
}
public void SetSignalStrenght()
{
_lblSignalStrenght.Text =
SystemState.PhoneSignalStrength.ToString();
}
private void BatteryLevelChanged(object sender,
EventArgs e)
{
SetBatteryLevel();
}
private void SetBatteryLevel()
{
_lblBatteryLevel.Text = GetBatteryLevel();
}
private string GetBatteryLevel()
{
string batteryLevel = "Unknown";
if (SystemState.PowerBatteryState ==
BatteryState.Charging)
{
return "Charging";
}
switch (SystemState.PowerBatteryStrength)
{
case BatteryLevel.VeryLow:
batteryLevel = "Very lowt";
break;
case BatteryLevel.Low:
batteryLevel = "Low";
break;
case BatteryLevel.Medium:
batteryLevel = "Medium";
break;
case BatteryLevel.High:
batteryLevel = "High";
break;
case BatteryLevel.VeryHigh:
batteryLevel = "Very High";
break;
}
return batteryLevel;
}
}
}

Hi PerOla,
This is really a good solution and working fine for me. Its really help me out in one of my project.
Thank you very much....
Vimal Panchal

Developing in C# possible?

I have no knowledge of Silverlight or XNA, I downloaded the Development tools, but I want to know if its possible to develop in C# even though it wont be native.............
thanx in advance

just for your understanding you can never code native with C# - therefore you'd need C/C++.
Silverlight and XNA development on WP7 is only supported in C# initially so it seems you're all ready!
didn't you check the code sample included in the Devtools?

RAMMANN said:
just for your understanding you can never code native with C# - therefore you'd need C/C++.
Silverlight and XNA development on WP7 is only supported in C# initially so it seems you're all ready!
didn't you check the code sample included in the Devtools?
Click to expand...
Click to collapse
I havent checked the sample codes yet, so I can code entirely in C# no silverlight knowledge needed?

I believe, you'll need to use Expression Blend to put your code behind a fancy Silverlight UI.
Doesn't seem that hard if you follow the training school videos school at http://www.microsoft.com/design/toolbox/

it's exactly the same like you used to develop with .NETCF though you have another bag of assemblies referenced. so stuff like file/registry access or PInvoke are gone. see it yourself:
/*
Copyright (c) 2010 Microsoft Corporation. All rights reserved.
Use of this sample source code is subject to the terms of the Microsoft license
agreement under which you licensed this sample source code and is provided AS-IS.
If you did not accept the terms of the license agreement, you are not authorized
to use this sample source code. For the terms of the license, please see the
license agreement between you and Microsoft.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Devices.Sensors;
using Microsoft.Phone.Shell;
namespace AccelerometerSample
{
/// <summary>
/// This sample shows how to use the device's accelerometer
/// </summary>
public partial class MainPage : PhoneApplicationPage
{
AccelerometerSensor accelerometer;
#region Initialization
/// <summary>
/// Constructor for the PhoneApplicationPage object.
/// In this method, the Application Bar is initialized.
/// </summary>
public MainPage()
{
InitializeComponent();
ApplicationBar = new ApplicationBar();
ApplicationBar.Visible = true;
ApplicationBarIconButton startStopButton = new ApplicationBarIconButton(new Uri("/Images/startstop.png", UriKind.Relative));
startStopButton.Click += new EventHandler(startStopButton_Click);
ApplicationBar.Buttons.Add(startStopButton);
}
#endregion
#region User Interface
/// <summary>
/// Click handler for the start/stop button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void startStopButton_Click(object sender, EventArgs e)
{
// If the accelerometer is null, it is initialized and started
if (accelerometer == null)
{
// Get the default accelerometer for the device
accelerometer = AccelerometerSensor.Default;
// Add an event handler for the ReadingChanged event.
accelerometer.ReadingChanged += new EventHandler<AccelerometerReadingAsyncEventArgs>(accelerometer_ReadingChanged);
// The Start method could throw and exception, so use a try block
try
{
statusTextBlock.Text = "starting accelerometer";
accelerometer.Start();
}
catch (AccelerometerStartFailedException exception)
{
statusTextBlock.Text = "error starting accelerometer";
}
}
else
{
// if the accelerometer is not null, call Stop
try
{
accelerometer.Stop();
accelerometer = null;
statusTextBlock.Text = "accelerometer stopped";
}
catch (AccelerometerStopFailedException exception)
{
statusTextBlock.Text = "error stopping accelerometer";
}
}
}
#endregion
#region Accelerometer Event Handling
/// <summary>
/// The event handler for the accelerometer ReadingChanged event.
/// BeginInvoke is used to pass this event args object to the UI thread.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void accelerometer_ReadingChanged(object sender, AccelerometerReadingAsyncEventArgs e)
{
Deployment.Current.Dispatcher.BeginInvoke(() => MyReadingChanged(e));
}
/// <summary>
/// Method for handling the ReadingChanged event on the UI thread.
/// This sample just displays the reading value.
/// </summary>
/// <param name="e"></param>
void MyReadingChanged(AccelerometerReadingAsyncEventArgs e)
{
statusTextBlock.Text = accelerometer.State.ToString();
XTextBlock.Text = e.Value.Value.X.ToString("0.00");
YTextBlock.Text = e.Value.Value.Y.ToString("0.00");
ZTextBlock.Text = e.Value.Value.Z.ToString("0.00");
}
#endregion
}
}
Click to expand...
Click to collapse

You need Silverlight or XNA knowledge, but the language is C#! Silverlight and XNA are just the Framework to use for developing Apps...it's still C#.
dragi

silverlight is the ui aspect of your app
there are things you will need to know about silverlight to get your information from say a database to display on fields of your application.
xna is for gaming programming (gpu interfacing, its what is used for console and zune game programming).

Thanx all!
I think I understand it now.
The developing is still being done in C# but you Need knowledge of Silverlight and XNA to use those Frameworks!
I think I will start with something really simple drawing an image on the screen

Closing gps in gps event handler - endless loop

In my application when I get position latitude and longitude from GPS, I am downloading bing map to a picture box. I've been trying now to protect my application in case there is no internet connection. I've done that in the GetMap function and it works fine. After that I want to close gps - the problem is that I'm trying to do that in gps event handler - it is so because I update the picture box constantly:
Code:
void UpdateData(object sender, System.EventArgs args)
{
menuGPS.Text = "Enable GPS";
menuZoom.Enabled = false;
menuView.Enabled = false;
}
void gps_LocationChanged(object sender, Microsoft.WindowsMobile.Samples.Location.LocationChangedEventArgs args)
{
if (args.Position.LatitudeValid && args.Position.LongitudeValid)
{
if (isCameraEnabled == false)
{
try
{
pbMap.Invoke((UpdateMap)delegate()
{
pbMap.Image = bingMap.GetMap(args.Position.Latitude,
args.Position.Longitude,
zoom,
mapStyle);
});
if (pbMap.Image == null)
{
Invoke(updateDataHandler);
gpsData.gps.LocationChanged -= gps_LocationChanged;
gpsData.closeGPS();
}
}
catch (ArgumentException ex)
{
MessageBox.Show("An error has occured:" + ex.Message , "Error");
}
}
else
{
}
}
}
So after the gpsData.gps.LocationChanged -= gps_LocationChanged; and gpsData.closeGPS(); are being called in the event handler the gps gets stuck in the WaitForGpsEvents() method in GPS.cs in the while loop because bool lisening value is not changed to false.
If I put gpsData.gps.LocationChanged -= gps_LocationChanged; and gpsData.closeGPS(); to the void UpdateData(object sender, System.EventArgs args) then it stops in the Close() method on the lock condition:
// block until our event thread is finished before
// we close our native event handles
lock (this)
How can I close the GPS?

Hooking a protected List in an Inner Class with an odd set of Parameters

So, I'm getting fairly good at hooking and modifying classes, but this one is so unique, I'm not quite sure how to approach hooking it to do what I want. Code for the method/class I want to attack:
Code:
private class CreateLaunchPointListTask
extends AsyncTask<Void, Void, List<LaunchPoint>>
{
private CreateLaunchPointListTask() {}
protected List<LaunchPoint> doInBackground(Void... paramVarArgs)
{
paramVarArgs = mContext.getString(2131558445);
Object localObject = new Intent("android.intent.action.MAIN");
((Intent)localObject).addCategory(paramVarArgs);
paramVarArgs = new LinkedList();
PackageManager localPackageManager = mContext.getPackageManager();
localObject = localPackageManager.queryIntentActivities((Intent)localObject, 129);
int j = ((List)localObject).size();
int i = 0;
while (i < j)
{
ResolveInfo localResolveInfo = (ResolveInfo)((List)localObject).get(i);
if (activityInfo != null) {
paramVarArgs.add(new LaunchPoint(mContext, localPackageManager, localResolveInfo));
}
i += 1;
}
return paramVarArgs;
}
public void onPostExecute(List<LaunchPoint> arg1)
{
synchronized (mLock)
{
mAllLaunchPoints.clear();
mAllLaunchPoints.addAll(???);
synchronized (mCachedActions)
{
LaunchPointListGenerator.access$502(LaunchPointListGenerator.this, true);
if (!mCachedActions.isEmpty()) {
((LaunchPointListGenerator.CachedAction)mCachedActions.remove()).apply();
}
}
}
LaunchPointListGenerator.access$602(LaunchPointListGenerator.this, true);
Iterator localIterator = mListeners.iterator();
while (localIterator.hasNext()) {
((LaunchPointListGenerator.Listener)localIterator.next()).onLaunchPointListGeneratorReady();
}
}
}
So, while this is a big chunk of code, everything I want to do is really in the first few lines:
Code:
paramVarArgs = mContext.getString(2131558445);
Object localObject = new Intent("android.intent.action.MAIN");
((Intent)localObject).addCategory(paramVarArgs);
So, string 2131558445 is a specific intent. What I would like to do is add *another* category after 2131558445 is added to localObject.
That would be the simplest implementation.
A more advanced implementation would be to actually and return a second LinkedList, paramVarArgs2, that only matches up to the second intent category that we're inserting.
Any help would be greatly appreciated.