GraphicsDeviceCapabilities.TextureCaps.SupportsNonPower2Conditional Property

Gets a value indicating whether the device supports the use of 2D textures with dimensions that are not powers of two, under certain conditions.

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

Syntax

public bool SupportsNonPower2Conditional { get; }

Property Value

true if the device supports the use of 2D textures with dimensions that are not powers of two, under certain conditions; false otherwise.

Remarks

The device can use a texture with dimensions that are not a power of two, as long as these conditions are met:

• The texture addressing mode for the texture stage is set to TextureAddressMode.Clamp.
• Texture wrapping for the texture stage is disabled (Wrap1 - Wrap15 set to TextureWrapCoordinates.Zero)
• Mipmapping is not in use (use magnification filter only).
• Texture formats must not be SurfaceFormat.Dxt1 through SurfaceFormat.Dxt5.

If this flag is not set, and .RequiresPower2 is also not set, then unconditional support is provided for 2D textures with dimensions that are not powers of two.

A texture that is not a power of two cannot be set at a stage that will be read based on a shader computation (such as the bem - ps and texm3x3 - ps instructions in pixel shaders versions 1_0 to 1_3). For example, these textures can be used to store bumps that will be fed into texture reads, but not the environment maps that are used in texbem - ps, texbeml - ps, and texm3x3spec - ps. This means that a texture with dimensions that are not powers of two cannot be addressed or sampled using texture coordinates computed within the shader. This type of operation is known as a dependent read and cannot be performed on these types of textures.

See Also

Reference

GraphicsDeviceCapabilities.TextureCaps Structure
GraphicsDeviceCapabilities.TextureCaps Members
Microsoft.Xna.Framework.Graphics Namespace

Platforms

Xbox 360, Windows XP SP2, Windows Vista