Category Archives: Programming languages

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29
01
16
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Using OpenGL 3.0 with MSOpenTech ANGLE

Posted by | C++, OpenGL, UWP |

Typically ANGLE library is used with OpenGL 2.0, but I successfully tried to enable OpenGL 3.0:

const EGLint contextAttributes[] = 
{ 
    EGL_CONTEXT_CLIENT_VERSION, 3, 
    EGL_NONE
};

and used some OpenGL 3.0 features in my Universal Windows App. But today I tried to compile my application with the new version of ANGLE library and got EGL_BAD_CONFIG error while creating the OpenGL context. The source code that returns this error checks some EGL_OPENGL_ES3_BIT_KHR that is not set in the new version:

if (clientMajorVersion == 3 && !(configuration->conformant & EGL_OPENGL_ES3_BIT_KHR))
{
    return Error(EGL_BAD_CONFIG);
}

(more…)

23
01
16
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Debugging a C++ application on an Android device with VS2015 on Windows 10

Posted by | Android, C++, Development environments, Windows | Tagged |

VS2015 has an exciting ability to debug a C++ application on Android Emulator, but in this article I will talk about no less exciting and more time expensive ability to debug a C++ application on a real Android device. The first thing we need to spend the time with is figuring out how to enable USB debugging mode on our Android device. On my ASUS Zenfone I need to go to Settings->About->Software Information and tap on Build Number 7 times, after that I have USB debugging check box in Settings->Developer Options that I should tap as well:

enabling USB debugging mode on Android device USB debugging mode on Android device

(more…)

13
01
16
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Listening to a dependency property changes in Universal Windows App in C++

Posted by | C++, UWP |

If you want to be notified when some dependency property of a control changes, for example, UIElement::Visibility, you can do the following trick. First declare you own dependency property of the same type in some class:

public ref class MyListener
{
public:

    static property Windows::UI::Xaml::DependencyProperty ^ BoundVisibilityProperty
    {
        Windows::UI::Xaml::DependencyProperty ^ get() { return boundVisibilityProperty; }
    }

    property Windows::UI::Xaml::Visibility BoundVisibility
    {
        Windows::UI::Xaml::Visibility get() { return safe_cast<Windows::UI::Xaml::Visibility>(GetValue(boundVisibilityProperty)); }
        void set(Windows::UI::Xaml::Visibility value) { SetValue(boundVisibilityProperty, value); }
    }

    static Windows::UI::Xaml::DependencyProperty ^ boundVisibilityProperty;

    static void OnBoundVisibilityChanged(DependencyObject^ d, Windows::UI::Xaml::DependencyPropertyChangedEventArgs^ e);
};

(more…)

15
12
15
 1 Comment

Developing Universal Windows App (UWP) with Xamarin.Forms 2.0 in Visual Studio 2015

Posted by | C#, UWP, Xamarin |

Visual Studio 2015 has “Blank App (Xamarin.Forms Portable)” project template that creates three separate C# projects for Android, iOS and Windows.Phone 8.0 platforms that share the same C#/XAML code via so called PCL (Portable Class Library):

Blank App (Xamarin.Forms Portable)

(more…)

07
12
15
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Initialization of UWP C++ XAML application

Posted by | C++, UWP, XAML |

UWP C++ applications based on “DirectX 11 and XAML App” or “XAML App for OpenGL ES“ project templates have some partial App class defined in user code and in generated file App.g.h:

partial ref class App :  public ::Windows::UI::Xaml::Application,
    public ::Windows::UI::Xaml::Markup::IXamlMetadataProvider
{
public:
    void InitializeComponent();
    [Windows::Foundation::Metadata::DefaultOverload]
    virtual ::Windows::UI::Xaml::Markup::IXamlType^ GetXamlType(::Windows::UI::Xaml::Interop::TypeName type);
    virtual ::Windows::UI::Xaml::Markup::IXamlType^ GetXamlType(::Platform::String^ fullName);
    virtual ::Platform::Array<::Windows::UI::Xaml::Markup::XmlnsDefinition>^ GetXmlnsDefinitions();
private:
    ::XamlTypeInfo::InfoProvider::XamlTypeInfoProvider^ _provider;
    bool _contentLoaded;
};

the user code:

ref class App sealed
{
public:
    App();
    virtual void OnLaunched(Windows::ApplicationModel::Activation::LaunchActivatedEventArgs^ e) override;
    ...
};

(more…)

02
12
15
 1 Comment

Creating cross platform (Android, iOS, UWP) OpenGLES 2 applications with VS2015

Posted by | Android, C++, iOS, OpenGL, UWP |

Cross platform (Android, iOS, UWP) OpenGLES 2 application can be easily created in VS2015 using “OpenGLES 2 Application (Android, iOS, Windows Universal)” project template:

“OpenGLES 2 Application (Android, iOS, Windows Universal)” project template

(more…)

10
11
15
 1 Comment

Combining OpenGL and XAML together in a Universal Windows App (UWP)

Posted by | OpenGL, UWP, XAML |

Visual Studio 2015 allows easily combine OpenGL graphics with XAML controls in a single window. To accomplish this task we can create a new project based on “XAML App for OpenGL ES (Universal Windows)” template:

XAML App for OpenGL ES (Universal Windows)

(more…)

30
10
15
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How to multiply a value by a constant in WinRT XAML

Posted by | UWP, XAML |

The easiest way to accomplish this task is to use converter provided below. It is written in C++ but this convertor can be easily converted to C#:

[Windows::Foundation::Metadata::WebHostHidden]
public ref class MultiplicationConverter sealed : Windows::UI::Xaml::Data::IValueConverter
{
public:

    virtual Platform::Object^ Convert(Platform::Object^ value, Windows::UI::Xaml::Interop::TypeName targetType, Platform::Object^ parameter, Platform::String^ language);

    virtual Platform::Object^ ConvertBack(Platform::Object^ value, Windows::UI::Xaml::Interop::TypeName targetType, Platform::Object^ parameter, Platform::String^ language);

private:

    Platform::Object^ InternalConvert(Platform::Object^ value, Platform::Object^ parameter, bool forward);
};

(more…)

10
04
15
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Using Visual Leak Detector with MS Visual Studio 2013

Posted by | C++ | Tagged |

Go to Tools->Extensions and Updates, download and install Using Visual Leak Detector:

Using Visual Leak Detector

Create a header file, named, for example, CommonTools.h containing the following:

#pragma once

#include "C:\Program Files (x86)\Visual Leak Detector\include\vld.h" 

#pragma comment(lib, "C:\\Program Files (x86)\\Visual Leak Detector\\lib\\Win32\\vld.lib")

Include CommonTools.h in at least one file in all the C++ projects in your solution. Build debug version of the program. Visual Leak Detector will write the information on memory leaks to Output window when the program exits.

11
03
15
 1 Comment

How I fixed “error LNK2005: _DllMain@12 already defined in msvcrtd.lib”

Posted by | C++ | Tagged |

Today I got “error LNK2005: _DllMain@12 already defined in msvcrtd.lib” while linking some C++ CLI project with MFC support in MS Visual Studio 2013. As described in A LNK2005 error occurs when the CRT library and MFC libraries are linked in the wrong order in Visual C++A LNK2005 error occurs when the CRT library and MFC libraries are linked in the wrong order in Visual C++ article, I added /verbose:lib linker option:

MS Visual Studio Linker options

(more…)

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