Export (0) Print
Expand All

Texture2D.GetData Generic Method (Int32, Nullable<Rectangle>, T[], Int32, Int32)

Copies texture data into an array.

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

public void GetData<T> (
         int level,
         Nullable<Rectangle> rect,
         T[] data,
         int startIndex,
         int elementCount
) where T : ValueType

Type Parameters

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

Parameters

level
The mipmap level to copy from.
rect
The section of the texture to copy. null indicates the data will be copied from the entire texture.
data
The array to receive texture data.
startIndex
The index of the element in the array at which to start copying.
elementCount
The number of elements to copy.

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

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

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 < graphics.GraphicsDevice.PresentationParameters.BackBufferWidth &&
    Mouse.GetState().Y < graphics.GraphicsDevice.PresentationParameters.BackBufferHeight)
{
    backBufferData = new ResolveTexture2D(
        graphics.GraphicsDevice,
        graphics.GraphicsDevice.PresentationParameters.BackBufferWidth,
        graphics.GraphicsDevice.PresentationParameters.BackBufferHeight,
        1,
        graphics.GraphicsDevice.PresentationParameters.BackBufferFormat);


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

    Color[] retrievedColor = new Color[1];

    graphics.GraphicsDevice.ResolveBackBuffer(backBufferData);

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

Xbox 360, Windows XP SP2, Windows Vista

Community Additions

ADD
Show:
© 2014 Microsoft