Texture2D.GetData Generic Method (T )

项目
08/15/2012

Gets a copy of 2D texture data.

Syntax

'Declaration
Public Sub GetData(Of T As ValueType) ( _
         data As T() _
)

public void GetData<T> (
         T[] data
) where T : ValueType

public:
generic<typename T> where T : ValueType
void GetData(
         T data[]
)

Type Parameters

T
The type of the elements in the array. This is usually a Microsoft.Xna.Framework.Graphics.PackedVector type but it can be any fundamental type that matches the bit size of the surface format.

Parameters

data
Type: T
Array of data.

Exceptions

Exception type	Condition
ArgumentNullException	data must be of sufficient length to receive the data.
InvalidOperationException	The vertex stride is larger than the vertex buffer, or the vertex stride is too small for the type of data requested.

Example

In this example, the color of the pixel beneath the mouse is retrieved from the back buffer.

sourceTexture.SetData<Color>(sourceColorData);

// Initialize a texture with texture data from another texture
sourceTexture.GetData<Color>(destinationColorData);
destinationTexture.SetData<Color>(destinationColorData);
if (Mouse.GetState().LeftButton == ButtonState.Pressed &&
    // If the left button is pressed
    Mouse.GetState().X > 0 && Mouse.GetState().Y > 0 &&
    // and we are inside the game window
    (Mouse.GetState().X <
    GraphicsDevice.PresentationParameters.BackBufferWidth) &&
    (Mouse.GetState().Y <
    GraphicsDevice.PresentationParameters.BackBufferHeight))
{
    backBufferData = new Texture2D(
        GraphicsDevice,
        GraphicsDevice.PresentationParameters.BackBufferWidth,
        GraphicsDevice.PresentationParameters.BackBufferHeight);

    Rectangle sourceRectangle =
        new Rectangle(Mouse.GetState().X, Mouse.GetState().Y, 1, 1);

    Color[] retrievedColor = new Color[1];

    backBufferData.GetData<Color>(
        0,
        sourceRectangle,
        retrievedColor,
        0,
        1);
}

Requirements

Namespace: Microsoft.Xna.Framework.Graphics

Assembly: Microsoft.Xna.Framework.Graphics (in microsoft.xna.framework.graphics.dll)

Platforms

Windows Phone

通过