XNA Corrupted memory

**jimpie** · Aug 25th, 2012, 03:38 AM

Hello,

I've found this content class on the internet. I'm trying to use it for 2 pictureboxes so I can draw a map and a tileset (for a tilemap editor).

Code:

Public Class clsContent

    Public Class GameContent

        Public Content As ContentManager
        Private ServiceHelper As New ServiceHelper

        Public Sub New(GraphicsDevice As GraphicsDevice)
            ServiceHelper.GraphicsDeviceService(GraphicsDevice)
            Me.Content = New Content.ContentManager(ServiceHelper)
            Me.Content.RootDirectory = "Content"
        End Sub

    End Class

    Public Class ServiceHelper
        Implements IServiceProvider
        Implements IGraphicsDeviceService

        Public Function GetService(ByVal serviceType As System.Type) As Object Implements System.IServiceProvider.GetService
            Return Me
        End Function

        Public Event DeviceCreated(ByVal sender As Object, ByVal e As System.EventArgs) Implements Microsoft.Xna.Framework.Graphics.IGraphicsDeviceService.DeviceCreated
        Public Event DeviceDisposing(ByVal sender As Object, ByVal e As System.EventArgs) Implements Microsoft.Xna.Framework.Graphics.IGraphicsDeviceService.DeviceDisposing
        Public Event DeviceReset(ByVal sender As Object, ByVal e As System.EventArgs) Implements Microsoft.Xna.Framework.Graphics.IGraphicsDeviceService.DeviceReset
        Public Event DeviceResetting(ByVal sender As Object, ByVal e As System.EventArgs) Implements Microsoft.Xna.Framework.Graphics.IGraphicsDeviceService.DeviceResetting

        Private _gd As GraphicsDevice

        Public Sub GraphicsDeviceService(ByVal gd As GraphicsDevice)
            _gd = gd
        End Sub

        Public ReadOnly Property GraphicsDevice() As Microsoft.Xna.Framework.Graphics.GraphicsDevice Implements Microsoft.Xna.Framework.Graphics.IGraphicsDeviceService.GraphicsDevice
            Get
                Return _gd
            End Get
        End Property
    End Class

End Class

this is the code where it initializes the spritebatch

Code:

Module modPublics

    Public GDevice_MAP As GraphicsDevice
    Public SBatch_MAP As SpriteBatch

    Public GDevice_TILESET As GraphicsDevice
    Public SBatch_TILESET As SpriteBatch

    Public OurContent As clsContent.GameContent

    Public Tileset As Texture2D = Nothing
    Public Mapset As Texture2D = Nothing

    Public Function InitalizeGraphics_MAP(ByRef Surface As PictureBox) As Boolean

        Dim retValue As Boolean

        Try
            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False

            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice_MAP = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)

            OurContent = New clsContent.GameContent(GDevice_MAP)
            OurContent.Content.RootDirectory = "Content"

            SBatch_MAP = New SpriteBatch(GDevice_MAP)

            '//LOAD GRAPHICS
            LoadGraphics()

            retValue = True

        Catch ex As Exception

            retValue = False
            MsgBox(ex.Message)

        End Try

        Return retValue

    End Function

    Public Function InitalizeGraphics_TILESET(ByRef Surface As PictureBox) As Boolean

        Dim retValue As Boolean

        Try
            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False

            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice_TILESET = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)

            OurContent = New clsContent.GameContent(GDevice_TILESET)
            OurContent.Content.RootDirectory = "Content"

            SBatch_TILESET = New SpriteBatch(GDevice_TILESET)

            '//LOAD GRAPHICS
            LoadGraphics()

            retValue = True

        Catch ex As Exception

            retValue = False
            MsgBox(ex.Message)

        End Try

        Return retValue

    End Function

    Private Sub LoadGraphics()

        Try

            '//TILES
            Tileset = OurContent.Content.Load(Of Texture2D)("Content/Graphics/Tilesets/0")
            ' Mapset = OurContent.Content.Load(Of Texture2D)("Content/Graphics/Tilesets/0")

        Catch ex As Exception

            MessageBox.Show(ex.Message & " - LoadGraphics")

        End Try

    End Sub

End Module

Code:

    Private Sub frmMain_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

        InitalizeGraphics_TILESET(picTILESET)
        InitalizeGraphics_MAP(picMAP)

    End Sub

But the problem is that when I start drawing my application says:
"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

I'm using a diffrent spritebatch for the map and for the tileset as you can see above.
but it's only drawing for one spritebatch. How can I fix this so it draws both the pictureboxes?

the draw sub:

Code:

    Public Sub NewMap()

        GDevice_TILESET.Clear(Color.Black)
        SBatch_TILESET.Begin()
        SBatch_TILESET.Draw(Tileset, New Rectangle(0, 0, 32, 32), New Rectangle(0, 0, 32, 32), Color.White)
        SBatch_TILESET.End()
        GDevice_TILESET.Present()

        GDevice_MAP.Clear(Color.Black)
        SBatch_MAP.Begin()
        SBatch_MAP.Draw(Tileset, New Rectangle(0, 0, 32, 32), New Rectangle(0, 0, 32, 32), Color.White)
        SBatch_MAP.End()
        GDevice_MAP.Present()

    End Sub

this is how it looks like
Name: Naamloos.png
Views: 220
Size: 61.1 KB

**Inferrd** · Aug 25th, 2012, 12:45 PM

You might be using a different spritebatch for the map box and for the tileset box, but you use the same Texture2D object (TileSet) for both. As that was created with a reference to the map box's GraphicsDevice, it is (presumably?) only renderable in the map box.

I would change the global scope of your OurContent variable to being declared locally within each InitalizeGraphics functions and then create any needed Texture2D objects within those functions.

vb.net Code:

Imports System.Windows.Forms
 
Module modPublics
 
    Public GDevice_MAP As GraphicsDevice
    Public SBatch_MAP As SpriteBatch
 
    Public GDevice_TILESET As GraphicsDevice
    Public SBatch_TILESET As SpriteBatch
 
    Public Tileset As Texture2D = Nothing
    Public Mapset As Texture2D = Nothing
 
 
    Public Function InitalizeGraphics_TILESET(ByRef Surface As PictureBox) As Boolean
        Dim retValue As Boolean
 
        Try
            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False
 
            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice_TILESET = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)
 
            SBatch_TILESET = New SpriteBatch(GDevice_TILESET)
 
            Dim OurContent = New clsContent.GameContent(GDevice_TILESET)
            OurContent.Content.RootDirectory = "Content"
            '//LOAD GRAPHICS
            Tileset = OurContent.Content.Load(Of Texture2D)("Content/Graphics/Tilesets/0")
 
            retValue = True
 
        Catch ex As Exception
            retValue = False
              MessageBox.Show(ex.Message)
        End Try
 
        Return retValue
    End Function
 
 
    Public Function InitalizeGraphics_MAP(ByRef Surface As PictureBox) As Boolean
        Dim retValue As Boolean
 
        Try
            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False
 
            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice_MAP = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)
 
            SBatch_MAP = New SpriteBatch(GDevice_MAP)
 
            Dim OurContent = New clsContent.GameContent(GDevice_MAP)
            OurContent.Content.RootDirectory = "Content"
            '//LOAD GRAPHICS
            Mapset = OurContent.Content.Load(Of Texture2D)("Content/Graphics/Tilesets/0")
 
            retValue = True
 
        Catch ex As Exception
            retValue = False
              MessageBox.Show(ex.Message)
        End Try
 
        Return retValue
    End Function
 
 
End Module

Use the apropriate Texture2D object for the SpriteBatch and GraphicsDevice that you are drawing to. (Tileset with SBatch_TILESET and Mapset with SBatch_MAP)

Code:

Public Sub NewMap()

    GDevice_TILESET.Clear(Color.Black)
    SBatch_TILESET.Begin()
    SBatch_TILESET.Draw(Tileset, New Rectangle(0, 0, 32, 32), New Rectangle(0, 0, 32, 32), Color.White)
    SBatch_TILESET.End()
    GDevice_TILESET.Present()

    GDevice_MAP.Clear(Color.Black)
    SBatch_MAP.Begin()
    SBatch_MAP.Draw(Mapset, New Rectangle(0, 0, 32, 32), New Rectangle(0, 0, 32, 32), Color.White)
    SBatch_MAP.End()
    GDevice_MAP.Present()

End Sub

**jimpie** · Aug 26th, 2012, 09:24 AM

Originally Posted by Inferrd

You might be using a different spritebatch for the map box and for the tileset box, but you use the same Texture2D object (TileSet) for both. As that was created with a reference to the map box's GraphicsDevice, it is (presumably?) only renderable in the map box.

I would change the global scope of your OurContent variable to being declared locally within each InitalizeGraphics functions and then create any needed Texture2D objects within those functions.

vb.net Code:

Imports System.Windows.Forms
 
Module modPublics
 
    Public GDevice_MAP As GraphicsDevice
    Public SBatch_MAP As SpriteBatch
 
    Public GDevice_TILESET As GraphicsDevice
    Public SBatch_TILESET As SpriteBatch
 
    Public Tileset As Texture2D = Nothing
    Public Mapset As Texture2D = Nothing
 
 
    Public Function InitalizeGraphics_TILESET(ByRef Surface As PictureBox) As Boolean
        Dim retValue As Boolean
 
        Try
            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False
 
            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice_TILESET = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)
 
            SBatch_TILESET = New SpriteBatch(GDevice_TILESET)
 
            Dim OurContent = New clsContent.GameContent(GDevice_TILESET)
            OurContent.Content.RootDirectory = "Content"
            '//LOAD GRAPHICS
            Tileset = OurContent.Content.Load(Of Texture2D)("Content/Graphics/Tilesets/0")
 
            retValue = True
 
        Catch ex As Exception
            retValue = False
              MessageBox.Show(ex.Message)
        End Try
 
        Return retValue
    End Function
 
 
    Public Function InitalizeGraphics_MAP(ByRef Surface As PictureBox) As Boolean
        Dim retValue As Boolean
 
        Try
            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False
 
            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice_MAP = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)
 
            SBatch_MAP = New SpriteBatch(GDevice_MAP)
 
            Dim OurContent = New clsContent.GameContent(GDevice_MAP)
            OurContent.Content.RootDirectory = "Content"
            '//LOAD GRAPHICS
            Mapset = OurContent.Content.Load(Of Texture2D)("Content/Graphics/Tilesets/0")
 
            retValue = True
 
        Catch ex As Exception
            retValue = False
              MessageBox.Show(ex.Message)
        End Try
 
        Return retValue
    End Function
 
 
End Module

Use the apropriate Texture2D object for the SpriteBatch and GraphicsDevice that you are drawing to. (Tileset with SBatch_TILESET and Mapset with SBatch_MAP)

Code:

Public Sub NewMap()

    GDevice_TILESET.Clear(Color.Black)
    SBatch_TILESET.Begin()
    SBatch_TILESET.Draw(Tileset, New Rectangle(0, 0, 32, 32), New Rectangle(0, 0, 32, 32), Color.White)
    SBatch_TILESET.End()
    GDevice_TILESET.Present()

    GDevice_MAP.Clear(Color.Black)
    SBatch_MAP.Begin()
    SBatch_MAP.Draw(Mapset, New Rectangle(0, 0, 32, 32), New Rectangle(0, 0, 32, 32), Color.White)
    SBatch_MAP.End()
    GDevice_MAP.Present()

End Sub

Thanks, guess it worked!

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