Class Texture2DAtlas

A generic Atlas texture of 2D textures. An atlas texture is a texture collection that collects multiple sub-textures into a single big texture. Sub-texture allocation for Texture2DAtlas is static and will not change after initial allocation. Does not add mipmap padding for sub-textures.

Inheritance

Object

Texture2DAtlas

PowerOfTwoTextureAtlas

Namespace: UnityEngine.Rendering

Syntax

public class Texture2DAtlas

Constructors

Texture2DAtlas(Int32, Int32, GraphicsFormat, FilterMode, Boolean, String, Boolean)

Creates a new empty texture atlas.

Declaration

public Texture2DAtlas(int width, int height, GraphicsFormat format, FilterMode filterMode = FilterMode.Point, bool powerOfTwoPadding = false, string name = "", bool useMipMap = true)

Parameters

Type	Name	Description
Int32	width	Width of the atlas in pixels.
Int32	height	Height of atlas in pixels.
GraphicsFormat	format	GraphicsFormat of the atlas.
FilterMode	filterMode	Filtering mode of the atlas.
Boolean	powerOfTwoPadding	Power of two padding.
String	name	Name of the atlas
Boolean	useMipMap	Use mip maps

Properties

AtlasTexture

Handle to the texture of the atlas.

Declaration

public RTHandle AtlasTexture { get; }

Property Value

Type	Description
RTHandle

maxMipLevelPadding

Maximum mip padding (pow2) that can be applied to the textures in the atlas

Declaration

public static int maxMipLevelPadding { get; }

Property Value

Type	Description
Int32

Methods

AddTexture(CommandBuffer, ref Vector4, Texture)

Add a texture into the atlas.

Declaration

public virtual bool AddTexture(CommandBuffer cmd, ref Vector4 scaleOffset, Texture texture)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command buffer used for texture copy.
Vector4	scaleOffset	Sub-texture rectangle for the added texture. Scale in .xy, offset int .zw
Texture	texture	The texture to be added.

Returns

Type	Description
Boolean	True if the atlas contains the texture, false otherwise.

AllocateTexture(CommandBuffer, ref Vector4, Texture, Int32, Int32, Int32)

Allocate space from the atlas for a texture and copy texture contents into the atlas.

Declaration

public virtual bool AllocateTexture(CommandBuffer cmd, ref Vector4 scaleOffset, Texture texture, int width, int height, int overrideInstanceID = -1)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.
Vector4	scaleOffset	Destination scale (.xy) and offset (.zw)
Texture	texture	Source Texture
Int32	width	Request width in pixels.
Int32	height	Request height in pixels.
Int32	overrideInstanceID	Override texture instance ID.

Returns

Type	Description
Boolean

AllocateTextureWithoutBlit(Int32, Int32, Int32, ref Vector4)

Allocate space from the atlas for a texture.

Declaration

public virtual bool AllocateTextureWithoutBlit(int instanceId, int width, int height, ref Vector4 scaleOffset)

Parameters

Type	Name	Description
Int32	instanceId	Source texture instance ID.
Int32	width	Request width in pixels.
Int32	height	Request height in pixels.
Vector4	scaleOffset	Allocated scale (.xy) and offset (.zw).

Returns

Type	Description
Boolean	True on success, false otherwise.

AllocateTextureWithoutBlit(Texture, Int32, Int32, ref Vector4)

Allocate space from the atlas for a texture.

Declaration

public bool AllocateTextureWithoutBlit(Texture texture, int width, int height, ref Vector4 scaleOffset)

Parameters

Type	Name	Description
Texture	texture	Source texture.
Int32	width	Request width in pixels.
Int32	height	Request height in pixels.
Vector4	scaleOffset	Allocated scale (.xy) and offset (.zw).

Returns

Type	Description
Boolean	True on success, false otherwise.

BlitCubeTexture2D(CommandBuffer, Vector4, Texture, Boolean, Int32)

Blit and project Cube texture into a 2D texture in the atlas.

Declaration

public virtual void BlitCubeTexture2D(CommandBuffer cmd, Vector4 scaleOffset, Texture texture, bool blitMips = true, int overrideInstanceID = -1)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.
Vector4	scaleOffset	Destination scale (.xy) and offset (.zw)
Texture	texture	Source Texture
Boolean	blitMips	Blit mip maps.
Int32	overrideInstanceID	Override texture instance ID.

BlitOctahedralTexture(CommandBuffer, Vector4, Texture, Vector4, Boolean, Int32)

Blit octahedral texture into the atlas.

Declaration

public virtual void BlitOctahedralTexture(CommandBuffer cmd, Vector4 scaleOffset, Texture texture, Vector4 sourceScaleOffset, bool blitMips = true, int overrideInstanceID = -1)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.
Vector4	scaleOffset	Destination scale (.xy) and offset (.zw)
Texture	texture	Source Texture
Vector4	sourceScaleOffset	Source scale (.xy) and offset(.zw).
Boolean	blitMips	Blit mip maps.
Int32	overrideInstanceID	Override texture instance ID.

BlitTexture(CommandBuffer, Vector4, Texture, Vector4, Boolean, Int32)

Blit 2D texture into the atlas.

Declaration

public virtual void BlitTexture(CommandBuffer cmd, Vector4 scaleOffset, Texture texture, Vector4 sourceScaleOffset, bool blitMips = true, int overrideInstanceID = -1)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.
Vector4	scaleOffset	Destination scale (.xy) and offset (.zw)
Texture	texture	Source Texture
Vector4	sourceScaleOffset	Source scale (.xy) and offset(.zw).
Boolean	blitMips	Blit mip maps.
Int32	overrideInstanceID	Override texture instance ID.

ClearTarget(CommandBuffer)

Clear atlas texture. Target command buffer for graphics commands.

Declaration

public void ClearTarget(CommandBuffer cmd)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.

GetTextureID(Texture)

Get sub-texture ID for the atlas.

Declaration

public int GetTextureID(Texture texture)

Parameters

Type	Name	Description
Texture	texture	Source texture.

Returns

Type	Description
Int32	Texture instance ID.

GetTextureID(Texture, Texture)

Get sub-texture ID for the atlas.

Declaration

public int GetTextureID(Texture textureA, Texture textureB)

Parameters

Type	Name	Description
Texture	textureA	Source texture A.
Texture	textureB	Source texture B.

Returns

Type	Description
Int32	Combined texture instance ID.

IsCached(out Vector4, Int32)

Check if the atlas contains the texture.

Declaration

public bool IsCached(out Vector4 scaleOffset, int id)

Parameters

Type	Name	Description
Vector4	scaleOffset	Texture scale (.xy) and offset (.zw).
Int32	id	Source texture instance ID.

Returns

Type	Description
Boolean

IsCached(out Vector4, Texture)

Check if the atlas contains the textures.

Declaration

public bool IsCached(out Vector4 scaleOffset, Texture texture)

Parameters

Type	Name	Description
Vector4	scaleOffset	Texture scale (.xy) and offset (.zw).
Texture	texture	Source texture

Returns

Type	Description
Boolean	True if the texture is in the atlas, false otherwise.

IsCached(out Vector4, Texture, Texture)

Check if the atlas contains the textures.

Declaration

public bool IsCached(out Vector4 scaleOffset, Texture textureA, Texture textureB)

Parameters

Type	Name	Description
Vector4	scaleOffset	Texture scale (.xy) and offset (.zw).
Texture	textureA	Source texture A.
Texture	textureB	Source texture B.

Returns

Type	Description
Boolean	True if the texture is in the atlas, false otherwise.

NeedsUpdate(Texture, Boolean)

Check if contents of a texture needs to be updated in the atlas.

Declaration

public virtual bool NeedsUpdate(Texture texture, bool needMips = false)

Parameters

Type	Name	Description
Texture	texture	Source texture.
Boolean	needMips	Texture uses mips.

Returns

Type	Description
Boolean	True if texture needs update, false otherwise.

NeedsUpdate(Texture, Texture, Boolean)

Check if contents of a texture needs to be updated in the atlas.

Declaration

public virtual bool NeedsUpdate(Texture textureA, Texture textureB, bool needMips = false)

Parameters

Type	Name	Description
Texture	textureA	Source texture A.
Texture	textureB	Source texture B.
Boolean	needMips	Texture uses mips.

Returns

Type	Description
Boolean	True if texture needs update, false otherwise.

Release()

Release atlas resources.

Declaration

public void Release()

ResetAllocator()

Clear atlas sub-texture allocations.

Declaration

public void ResetAllocator()

UpdateTexture(CommandBuffer, Texture, Texture, ref Vector4, Vector4, Boolean, Boolean)

Update a texture in the atlas.

Declaration

public virtual bool UpdateTexture(CommandBuffer cmd, Texture oldTexture, Texture newTexture, ref Vector4 scaleOffset, Vector4 sourceScaleOffset, bool updateIfNeeded = true, bool blitMips = true)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.
Texture	oldTexture	Texture in atlas.
Texture	newTexture	Replacement source texture.
Vector4	scaleOffset	Destination scale (.xy) and offset (.zw)
Vector4	sourceScaleOffset	Source scale (.xy) and offset(.zw).
Boolean	updateIfNeeded	Enable texture blit.
Boolean	blitMips	Blit mip maps.

Returns

Type	Description
Boolean	True on success, false otherwise.

UpdateTexture(CommandBuffer, Texture, ref Vector4, Boolean, Boolean)

Update a texture in the atlas.

Declaration

public virtual bool UpdateTexture(CommandBuffer cmd, Texture texture, ref Vector4 scaleOffset, bool updateIfNeeded = true, bool blitMips = true)

Parameters

Type	Name	Description
CommandBuffer	cmd	Target command buffer for graphics commands.
Texture	texture	Texture in atlas.
Vector4	scaleOffset	Destination scale (.xy) and offset (.zw)
Boolean	updateIfNeeded	Enable texture blit.
Boolean	blitMips	Blit mip maps.

Returns

Type	Description
Boolean	True on success, false otherwise.

Extension Methods

ReflectionUtils.Invoke(Object, String, Object[])

ReflectionUtils.SetField(Object, String, Object)

ReflectionUtils.GetField(Object, String)

ReflectionUtils.GetFields(Object)