The Blitter class works on textures and targets identified with Texture, RenderTargetIdentifier but most importantly with RTHandle. This enables copying to / from textures managed by the RenderGraph.

To use the Blitter functionality in the context of custom Scriptable Render Pipelines, you must first create a blit shader that implements various passes covering the blit variants. To facilitate this, you can create a modified version of the Universal Render Pipeline CoreBlit.shader as displayed in the documentation of the Initialize(Shader, Shader) method.

Prior to using the Blitter, you must call Initialize(Shader, Shader) once. When the render pipeline is to be disposed, you must call the Cleanup() method to dispose of resources created by the Blitter.

Methods

BlitCameraTexture(CommandBuffer, RTHandle, RTHandle, float, bool)

Adds in a CommandBuffer a command to copy a camera related XR compatible texture identified by its RTHandle into a destination render target.

Declaration

public static void BlitCameraTexture(CommandBuffer cmd, RTHandle source, RTHandle destination, float mipLevel = 0, bool bilinear = false)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
RTHandle	destination	RTHandle of the destination render target to copy to.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Camera related textures are created with CreateTexture(in TextureDesc) using TextureDesc(Vector2, bool, bool) or TextureDesc(ScaleFunc, bool, bool) to automatically determine their resolution relative to the camera's render target resolution. Compared to the various BlitTexture(CommandBuffer, RTHandle, Vector4, float, int, bool) and BlitTexture2D(RasterCommandBuffer, RTHandle, Vector4, float, bool) methods, this function automatically handles the scaleBias parameter. The copy operation will always write to the full destination render target rectangle.

Examples

// Create an XR texture that has half the width and height of the camera's back buffer.
TextureDesc texDesc = new TextureDesc(new Vector2(0.5f, 0.5f), false, true);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Do a full copy of the texture's first mip level to a destination render target
// scaling with bilinear filtering to the destination render target's full rect.
Blitter.BlitCameraTexture(cmd, source, destination, 0, true);

BlitCameraTexture(CommandBuffer, RTHandle, RTHandle, Material, int)

Adds in a CommandBuffer a command to copy a camera related texture identified by its RTHandle into a destination render target, using a user material and specific shader pass.

Declaration

public static void BlitCameraTexture(CommandBuffer cmd, RTHandle source, RTHandle destination, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
RTHandle	destination	RTHandle of the destination render target to copy to.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

Camera related textures are created with the CreateTexture(in TextureDesc) method using TextureDesc(Vector2, bool, bool) or TextureDesc(ScaleFunc, bool, bool) to automatically determine their resolution relative to the camera's render target resolution. Compared to the various BlitTexture(CommandBuffer, RTHandle, Vector4, float, int, bool) and BlitTexture2D(RasterCommandBuffer, RTHandle, Vector4, float, bool) methods, this function automatically handles the scaleBias parameter of these methods. The copy operation will always write to the full destination render target rectangle.

The "_BlitTexture" shader property will be set to the source texture and the "_BlitScaleBias" shader property will be set to the appropriate parameter, prior to the draw.

This overload is equivalent to BlitCameraTexture(CommandBuffer, RTHandle, RTHandle, RenderBufferLoadAction, RenderBufferStoreAction, Material, int) with the loadAction set to Load and the storeAction set to Store.

Examples

// Create a texture that has half the width and height of the camera's back buffer.
TextureDesc texDesc = new TextureDesc(new Vector2(0.5f, 0.5f), false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Do a full copy of a source texture to a destination render target using the first pass
// of a custom material, scaling to the destination render target's full rectangle.
Blitter.BlitCameraTexture(cmd, source, dest, blitMaterial, 0);

BlitCameraTexture(CommandBuffer, RTHandle, RTHandle, Rect, float, bool)

Adds in a CommandBuffer a command to copy a camera related XR compatible texture identified by its RTHandle into a destination render target using a custom destination viewport.

Declaration

public static void BlitCameraTexture(CommandBuffer cmd, RTHandle source, RTHandle destination, Rect destViewport, float mipLevel = 0, bool bilinear = false)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
RTHandle	destination	RTHandle of the destination render target to copy to.
Rect	destViewport	Rect of the destination viewport to write to.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Camera related textures are created with the CreateTexture(in TextureDesc) method using TextureDesc(Vector2, bool, bool) or TextureDesc(ScaleFunc, bool, bool) to automatically determine their resolution relative to the camera's render target resolution. Compared to the various BlitTexture(CommandBuffer, RTHandle, Vector4, float, int, bool) and BlitTexture2D(RasterCommandBuffer, RTHandle, Vector4, float, bool) methods, this function automatically handles the scaleBias parameter. The copy operation will write to the destViewport viewport Rect.

Examples

// Create an XR texture that has half the width and height of the camera's back buffer.
TextureDesc texDesc = new TextureDesc(new Vector2(0.5f, 0.5f), false, true);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Do a full copy of the texture's first mip level to a destination render target
// scaling with bilinear filtering to a custom 512 x 256 pixels viewport.
Blitter.BlitCameraTexture(cmd, source, destination, new Rect(0, 0, 512, 256), 0, true);

BlitCameraTexture(CommandBuffer, RTHandle, RTHandle, RenderBufferLoadAction, RenderBufferStoreAction, Material, int)

Adds in a CommandBuffer a command to copy a camera related texture identified by its RTHandle into a destination render target, using a user material, specific shader pass and specific load / store actions.

Declaration

public static void BlitCameraTexture(CommandBuffer cmd, RTHandle source, RTHandle destination, RenderBufferLoadAction loadAction, RenderBufferStoreAction storeAction, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
RTHandle	destination	RTHandle of the destination render target to copy to.
RenderBufferLoadAction	loadAction	Load action to perform on the destination render target prior to the copying.
RenderBufferStoreAction	storeAction	Store action to perform on the destination render target after the copying.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

Camera related textures are created with the CreateTexture(in TextureDesc) method using TextureDesc(Vector2, bool, bool) or TextureDesc(ScaleFunc, bool, bool) to automatically determine their resolution relative to the camera's render target resolution. Compared to the various BlitTexture(CommandBuffer, RTHandle, Vector4, float, int, bool) and BlitTexture2D(RasterCommandBuffer, RTHandle, Vector4, float, bool) methods, this function automatically handles the scaleBias parameter. The copy operation will always write to the full destination render target rectangle.

The "_BlitTexture" shader property will be set to the source texture and the "_BlitScaleBias" shader property will be set to the appropriate value, prior to the draw.

Examples

// Create a texture that has half the width and height of the camera's back buffer.
TextureDesc texDesc = new TextureDesc(new Vector2(0.5f, 0.5f), false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Do a full copy of a source texture to a destination render target using the first pass
// of a custom material, scaling to the destination render target's full rectangle. Since
// the destination will be overwritten, mark the load action as "Don't care".
Blitter.BlitCameraTexture(cmd, source, dest, RenderBufferLoadAction.DontCare, RenderBufferStoreAction.Store, blitMaterial, 0);

BlitCameraTexture(CommandBuffer, RTHandle, RTHandle, Vector4, float, bool)

Adds in a CommandBuffer a command to copy a camera related XR compatible texture identified by its RTHandle into a destination render target, using a user defined scale and bias.

Declaration

public static void BlitCameraTexture(CommandBuffer cmd, RTHandle source, RTHandle destination, Vector4 scaleBias, float mipLevel = 0, bool bilinear = false)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
RTHandle	destination	RTHandle of the destination render target to copy to.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

The scaleBias parameter controls the rectangle of pixels in the source texture to copy by manipulating the source texture coordinates. The X and Y coordinates store the scaling factor to apply to these texture coordinates, while the Z and W coordinates store the texture coordinate offsets. The operation will always write to the full destination render target rectangle.

Examples

// Create a texture that has half the width and height of the camera's back buffer.
TextureDesc texDesc = new TextureDesc(new Vector2(0.5f, 0.5f), false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Copy the bottom left quadrant of the source texture's second mip level to the
// destination render target, scaling with bilinear filtering to the destination
// render target's full rect.
Blitter.BlitCameraTexture(cmd, source, dest, new Vector4(0.5f, 0.5f, 0f, 0f), 1, true);

BlitCameraTexture2D(CommandBuffer, RTHandle, RTHandle, float, bool)

Adds in a CommandBuffer a command to copy a camera related texture identified by its RTHandle into a destination render target.

Declaration

public static void BlitCameraTexture2D(CommandBuffer cmd, RTHandle source, RTHandle destination, float mipLevel = 0, bool bilinear = false)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
RTHandle	destination	RTHandle of the destination render target to copy to.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Camera related textures are created with the CreateTexture(in TextureDesc) method using TextureDesc(Vector2, bool, bool) or TextureDesc(ScaleFunc, bool, bool) to automatically determine their resolution relative to the camera's render target resolution. Compared to the various BlitTexture(CommandBuffer, RTHandle, Vector4, float, int, bool) and BlitTexture2D(RasterCommandBuffer, RTHandle, Vector4, float, bool) methods, this function automatically handles the scaleBias parameter. The copy operation will always write to the full destination render target rectangle.

Examples

// Create a texture that has half the width and height of the camera's back buffer.
TextureDesc texDesc = new TextureDesc(new Vector2(0.5f, 0.5f), false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Do a full copy of the texture's first mip level to a destination render target
// scaling with bilinear filtering to the destination render target's full rect.
Blitter.BlitCameraTexture(cmd, source, destination, 0, true);

BlitColorAndDepth(CommandBuffer, Texture, RenderTexture, Vector4, float, bool)

Adds in a CommandBuffer a command to copy two XR compatible color and depth textures into the currently bound render target's respective color and depth buffer.

Declaration

public static void BlitColorAndDepth(CommandBuffer cmd, Texture sourceColor, RenderTexture sourceDepth, Vector4 scaleBias, float mipLevel, bool blitDepth)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	sourceColor	Source color texture to copy from.
RenderTexture	sourceDepth	Source depth render texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	blitDepth	Enable copying of the source depth texture.

Remarks

Although the depth render texture can be passed as a parameter, the copying of the depth information is optional and must be enabled with the blitDepth parameter. The copying is done using the blitColorAndDepth shader passed as the second argument of the Initialize(Shader, Shader) method.

This overload is meant for textures and render targets which depend on XR output modes by proper handling, when necessary, of left / right eye data copying. This generally corresponds to textures which represent full screen data that may differ between eyes.

Examples

// Copy the bottom left quadrant of a source texture and depth texture to the render target
// using bilinear sampling, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitColorAndDepth(cmd, sourceColor, sourceDepth, new Vector4(0.5, 0.5, 0, 0), 0, true);

// Copy the top half of mip level 4 of both a source color texture and depth texture to the
// render target using nearest sampling, scaling to the destination render target's full
// rectangle.
Blitter.BlitColorAndDepth(cmd, sourceColor, sourceDepth, new Vector4(1, 0.5, 0, 0.5), 4, true);

BlitColorAndDepth(RasterCommandBuffer, Texture, RenderTexture, Vector4, float, bool)

Adds in a RasterCommandBuffer a command to copy two XR compatible color and depth textures into the currently bound render target's respective color and depth buffer.

Declaration

public static void BlitColorAndDepth(RasterCommandBuffer cmd, Texture sourceColor, RenderTexture sourceDepth, Vector4 scaleBias, float mipLevel, bool blitDepth)

Parameters

Type	Name	Description
RasterCommandBuffer	cmd	Command Buffer used for recording the action.
Texture	sourceColor	Source color texture to copy from.
RenderTexture	sourceDepth	Source depth render texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	blitDepth	Enable copying of the source depth texture.

Remarks

Examples

// Copy the bottom left quadrant of a source texture and depth texture to the render target
// using bilinear sampling, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitColorAndDepth(cmd, sourceColor, sourceDepth, new Vector4(0.5, 0.5, 0, 0), 0, true);

// Copy the top half of mip level 4 of both a source color texture and depth texture to the
// render target using nearest sampling, scaling to the destination render target's full
// rectangle.
Blitter.BlitColorAndDepth(cmd, sourceColor, sourceDepth, new Vector4(1, 0.5, 0, 0.5), 4, true);

BlitCubeToOctahedral2DQuad(CommandBuffer, Texture, Vector4, int)

Adds in a CommandBuffer a command to copy a cube map texture onto a portion of the current render target using octahedral mapping for the destination.

Declaration

public static void BlitCubeToOctahedral2DQuad(CommandBuffer cmd, Texture source, Vector4 scaleBiasRT, int mipLevelTex)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source cube texture to copy from.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.

Remarks

The scaleBiasRT parameter controls the rectangle of pixels in the render target to write to by manipulating the destination quad coordinates. The X and Y coordinates store the scaling factor to apply to texture coordinates, while the Z and W coordinates store the coordinate offsets.

Examples

// Copy the third mip level of a source cube map texture to the center rect
// of a 3x3 grid on the current render target, like so:
//    +-------+      + - + - + - +
//  /       / |      |   |   |   |
// +-------+  |      + - +---+ - +
// |       |  |  --> |   | X |   |
// |       |  +      + - +---+ - +
// |       | /       |   |   |   |
// +-------+         + - + - + - +
Vector4 center3by3 = new Vector4(1.0f/3.0f, 1.0f/3.0f, 1.0f/3.0f, 1.0f/3.0f);
Blitter.BlitCubeToOctahedral2DQuad(cmd, source, center3by3, 2);

BlitCubeToOctahedral2DQuadSingleChannel(CommandBuffer, Texture, Vector4, int)

Adds in a CommandBuffer a command to perform a single channel copy of a cube map texture onto a portion of the current render target using octahedral mapping for the destination.

Declaration

public static void BlitCubeToOctahedral2DQuadSingleChannel(CommandBuffer cmd, Texture source, Vector4 scaleBiasRT, int mipLevelTex)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source cube texture to copy from.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.

Remarks

The conversion to a single channel output depends on the source texture's format:

Texture Format	Output conversion
RGB(A)	the RGB luminance is written to the destination in all channels.
Red	the red value is written to the destination in all channels.
Alpha	the alpha value is written to the destination in all channels.

Examples

// Copy the third mip level of a source cube map texture to the center rect
// of a 3x3 grid on the current render target, like so:
//    +-------+      + - + - + - +
//  /       / |      |   |   |   |
// +-------+  |      + - +---+ - +
// |       |  |  --> |   | X |   |
// |       |  +      + - +---+ - +
// |       | /       |   |   |   |
// +-------+         + - + - + - +
Vector4 center3by3 = new Vector4(1.0f/3.0f, 1.0f/3.0f, 1.0f/3.0f, 1.0f/3.0f);
Blitter.BlitCubeToOctahedral2DQuadSingleChannel(cmd, source, center3by3, 2);

BlitCubeToOctahedral2DQuadWithPadding(CommandBuffer, Texture, Vector2, Vector4, int, bool, int, Vector4?)

Adds in a CommandBuffer a command to copy a cube map texture onto a portion of the current render target using octahedral mapping for the destination with extra padding on the destination rect.

Declaration

public static void BlitCubeToOctahedral2DQuadWithPadding(CommandBuffer cmd, Texture source, Vector2 textureSize, Vector4 scaleBiasRT, int mipLevelTex, bool bilinear, int paddingInPixels, Vector4? decodeInstructions = null)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source cube texture to copy from.
Vector2	textureSize	Source texture size in pixels.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.
bool	bilinear	Enable bilinear filtering.
int	paddingInPixels	Padding in pixels to add in all directions to the source rect.
Vector4?	decodeInstructions	The purpose of this parameter is to blit HDR-encoded values to a non HDR texture. Use values from API that produce HDR-encoded values, for example textureHDRDecodeValues. If this parameter is null, HDR decoding is disabled.

Remarks

The source cube map pixels are copied onto the destination rect with extra padding pixels taken from the source texture but using a specific octahedral mirror repeat mode. Both source rect pixels and padding pixels are blitted inside the destination rect. See BlitOctahedralWithPadding(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int) for a diagram of how padding is applied to the destination.

Examples

// Copy the third mip level of a source cube map texture to the center rect
// of a 3x3 grid on the current render target, like so:
//    +-------+      + - + - + - +
//  /       / |      |   |   |   |
// +-------+  |      + - +---+ - +
// |       |  |  --> |   | X |   |
// |       |  +      + - +---+ - +
// |       | /       |   |   |   |
// +-------+         + - + - + - +
// Desired padding on the destination rect
int paddingInPixelsOneDirection = 16;
// Multiply by two for the total padding along an axis.
int paddingInPixels = 2 * paddingInPixelsOneDirection;
Vector4 center3by3 = new Vector4(1.0f/3.0f, 1.0f/3.0f, 1.0f/3.0f, 1.0f/3.0f);
Vector2 subTextureSize = new Vector2(sourceWidth, sourceHeight);
// HDR to non-HDR decoding is not necessary here so drop the
// last parameter.
Blitter.BlitCubeToOctahedral2DQuadWithPadding(cmd, source, subTextureSize, center3by3, 2, paddingInPixels);

BlitOctahedralWithPadding(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int)

Adds in a CommandBuffer a command to copy an XR compatible octahedral environment texture onto a portion of the current render target with support for padding on the destination rect.

Declaration

public static void BlitOctahedralWithPadding(CommandBuffer cmd, Texture source, Vector2 textureSize, Vector4 scaleBiasTex, Vector4 scaleBiasRT, int mipLevelTex, bool bilinear, int paddingInPixels)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source texture to copy from.
Vector2	textureSize	Source texture size in pixels.
Vector4	scaleBiasTex	Scale and bias for sampling the source texture.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.
bool	bilinear	Enable bilinear filtering.
int	paddingInPixels	Padding in pixels to add in the destination rect. This is the total padding on an axis so to have N pixels added to the left, and N pixels to the right, `paddingInPixels` should be set to 2N.

Remarks

Diagram of the padding parameters
Diagram detailing the use of the padding, textureSize, scaleBiasTex and scaleBiasRT.

The source rect is copied to the destination rect along with extra padding pixels taken from the source texture but, compared to BlitQuadWithPadding(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int), using a specific octahedral mirror repeat mode. Both source rect pixels and padding pixels are blitted inside the destination rect.

The scaleBiasTex parameter controls the rectangle of pixels in the source texture to copy by manipulating the source texture coordinates. The X and Y coordinates store the scaling factor to apply to these texture coordinates, while the Z and W coordinates store the texture coordinate offsets.

Similarly, the scaleBiasRT parameter controls the rectangle of pixels in the render target to write to by manipulating the destination quad coordinates. The X and Y coordinates store the scaling factor to apply to texture coordinates, while the Z and W coordinates store the coordinate offsets.

Examples

// Create a 512 x 256 texture.
int sourceWidth = 512;
int sourceHeight = 256;
TextureDesc texDesc = new TextureDesc(sourceWidth, sourceHeight, false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Copy the top right quadrant of the source texture's first mip level to the bottom left
// quadrant of the current render target, without bilinear filtering, with 16 pixels of
// padding.
int paddingInPixelsOneDirection = 16;
// Multiply by two for the total padding along an axis.
int paddingInPixels = 2 * paddingInPixelsOneDirection;
Vector4 topRight = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
Vector4 bottomLeft = new Vector4(0.5f, 0.5f, 0.0f, 0.0f);
Vector2 subTextureSize = new Vector2(sourceWidth, sourceHeight);
Blitter.BlitOctahedralWithPadding(cmd, source, subTextureSize, topRight, bottomLeft, 0, false, paddingInPixels);

BlitOctahedralWithPaddingMultiply(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int)

Adds in a CommandBuffer a command to copy an XR compatible octahedral environment texture onto a portion of the current render target with a multiply blend and support for padding on the destination rect.

Declaration

public static void BlitOctahedralWithPaddingMultiply(CommandBuffer cmd, Texture source, Vector2 textureSize, Vector4 scaleBiasTex, Vector4 scaleBiasRT, int mipLevelTex, bool bilinear, int paddingInPixels)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source texture to copy from.
Vector2	textureSize	Source texture size in pixels.
Vector4	scaleBiasTex	Scale and bias for sampling the source texture.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.
bool	bilinear	Enable bilinear filtering.
int	paddingInPixels	Padding in pixels to add in all directions to the source rect.

Remarks

The source rect is blended onto the destination rect with a multiplicative blend, with extra padding pixels taken from the source texture but, compared to BlitQuadWithPaddingMultiply(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int), using a specific octahedral mirror repeat mode. Both source rect pixels and padding pixels are blitted inside the destination rect. See BlitOctahedralWithPadding(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int) for a diagram of how padding is applied to the destination.

Examples

// Create a 512 x 256 texture.
int sourceWidth = 512;
int sourceHeight = 256;
TextureDesc texDesc = new TextureDesc(sourceWidth, sourceHeight, false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Copy the top right quadrant of the source texture's first mip level to the bottom left
// quadrant of the current render target, without bilinear filtering, with 16 pixels of
// padding.
int paddingInPixelsOneDirection = 16;
// Multiply by two for the total padding along an axis.
int paddingInPixels = 2 * paddingInPixelsOneDirection;
Vector4 topRight = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
Vector4 bottomLeft = new Vector4(0.5f, 0.5f, 0.0f, 0.0f);
Vector2 subTextureSize = new Vector2(sourceWidth, sourceHeight);
Blitter.BlitOctahedralWithPaddingMultiply(cmd, source, subTextureSize, topRight, bottomLeft, 0, false, paddingInPixels);

BlitQuad(CommandBuffer, Texture, Vector4, Vector4, int, bool)

Adds in a CommandBuffer a command to copy an XR compatible texture onto a portion of the current render target.

Declaration

public static void BlitQuad(CommandBuffer cmd, Texture source, Vector4 scaleBiasTex, Vector4 scaleBiasRT, int mipLevelTex, bool bilinear)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source texture to copy from.
Vector4	scaleBiasTex	Scale and bias for sampling the source texture.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.
bool	bilinear	Enable bilinear filtering.

Remarks

Examples

// Copy the top right quadrant of the source texture's first mip level to the bottom left
// quadrant of the current render target, without bilinear filtering.
Vector4 topRight = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
Vector4 bottomLeft = new Vector4(0.5f, 0.5f, 0.0f, 0.0f);
Blitter.BlitQuad(cmd, source, topRight, bottomLeft, 0, false);

BlitQuadSingleChannel(CommandBuffer, Texture, Vector4, Vector4, int)

Adds in a CommandBuffer a command to perform a single channel copy off an XR compatible texture onto a portion of the current render target.

Declaration

public static void BlitQuadSingleChannel(CommandBuffer cmd, Texture source, Vector4 scaleBiasTex, Vector4 scaleBiasRT, int mipLevelTex)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source texture to copy from.
Vector4	scaleBiasTex	Scale and bias for sampling the source texture.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.

Remarks

The conversion to a single channel output depends on the source texture's format:

Texture Format	Output conversion
RGB(A)	the RGB luminance is written to the destination in all channels.
Red	the red value is written to the destination in all channels.
Alpha	the alpha value is written to the destination in all channels.

Examples

// Copy the top right quadrant of the source texture's first mip level to the bottom left
// quadrant of the current render target, without bilinear filtering.
Vector4 topRight = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
Vector4 bottomLeft = new Vector4(0.5f, 0.5f, 0.0f, 0.0f);
Blitter.BlitQuadSingleChannel(cmd, source, topRight, bottomLeft, 0, false);

BlitQuadWithPadding(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int)

Adds in a CommandBuffer a command to copy an XR compatible texture onto a portion of the current render target with support for padding on the destination rect.

Declaration

public static void BlitQuadWithPadding(CommandBuffer cmd, Texture source, Vector2 textureSize, Vector4 scaleBiasTex, Vector4 scaleBiasRT, int mipLevelTex, bool bilinear, int paddingInPixels)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source texture to copy from.
Vector2	textureSize	Source texture size in pixels.
Vector4	scaleBiasTex	Scale and bias for sampling the source texture.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.
bool	bilinear	Enable bilinear filtering.
int	paddingInPixels	Padding in pixels to add in the destination rect. This is the total padding on an axis so to have N pixels added to the left, and N pixels to the right, `paddingInPixels` should be set to 2N.

Remarks

Diagram of the padding parameters
Diagram detailing the use of the padding, textureSize, scaleBiasTex and scaleBiasRT.

The source rect is copied to the destination rect along with extra padding pixels taken from the source texture using the texture's wrapMode. Both source rect pixels and padding pixels are copied inside the destination rect.

Examples

// Create a 512 x 256 texture.
int sourceWidth = 512;
int sourceHeight = 256;
TextureDesc texDesc = new TextureDesc(sourceWidth, sourceHeight, false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Copy the top right quadrant of the source texture's first mip level to the bottom left
// quadrant of the current render target, without bilinear filtering, but with 16 pixels
// of padding.
int paddingInPixelsOneDirection = 16;
// Multiply by two for the total padding along an axis.
int paddingInPixels = 2 * paddingInPixelsOneDirection;
Vector4 topRight = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
Vector4 bottomLeft = new Vector4(0.5f, 0.5f, 0.0f, 0.0f);
Vector2 subTextureSize = new Vector2(sourceWidth, sourceHeight);
Blitter.BlitQuadWithPadding(cmd, source, subTextureSize, topRight, bottomLeft, 0, false, paddingInPixels);

BlitQuadWithPaddingMultiply(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int)

Adds in a CommandBuffer a command to blit an XR compatible texture onto a portion of the current render target with a multiply blend and support for padding on the destination rect.

Declaration

public static void BlitQuadWithPaddingMultiply(CommandBuffer cmd, Texture source, Vector2 textureSize, Vector4 scaleBiasTex, Vector4 scaleBiasRT, int mipLevelTex, bool bilinear, int paddingInPixels)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Texture	source	The source texture to copy from.
Vector2	textureSize	Source texture size in pixels.
Vector4	scaleBiasTex	Scale and bias for sampling the source texture.
Vector4	scaleBiasRT	Scale and bias for the destination quad.
int	mipLevelTex	Mip level of the source texture to sample.
bool	bilinear	Enable bilinear filtering.
int	paddingInPixels	Padding in pixels to add in the destination rect. This is the total padding on an axis so to have N pixels added to the left, and N pixels to the right, `paddingInPixels` should be set to 2N.

Remarks

The source rect is blended to the destination rect with a multiplicative blend, along with extra padding pixels taken from the source texture using the texture's wrapMode. Both source rect pixels and padding pixels are blitted inside the destination rect. See BlitQuadWithPadding(CommandBuffer, Texture, Vector2, Vector4, Vector4, int, bool, int) for a diagram of how padding is applied.

Examples

// Create a 512 x 256 texture.
int sourceWidth = 512;
int sourceHeight = 256;
TextureDesc texDesc = new TextureDesc(sourceWidth, sourceHeight, false, false);
RTHandle source = renderGraph.CreateTexture(texDesc);
// Copy the top right quadrant of the source texture's first mip level to the bottom left
// quadrant of the current render target, without bilinear filtering, with 16 pixels of
// padding.
int paddingInPixelsOneDirection = 16;
// Multiply by two for the total padding along an axis.
int paddingInPixels = 2 * paddingInPixelsOneDirection;
Vector4 topRight = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
Vector4 bottomLeft = new Vector4(0.5f, 0.5f, 0.0f, 0.0f);
Vector2 subTextureSize = new Vector2(sourceWidth, sourceHeight);
Blitter.BlitQuadWithPaddingMultiply(cmd, source, subTextureSize, topRight, bottomLeft, 0, false, paddingInPixels);

BlitTexture(CommandBuffer, RTHandle, Vector4, float, bool)

Adds in a CommandBuffer a command to copy an XR compatible texture identified by its RTHandle into the currently bound render target's color buffer.

Declaration

public static void BlitTexture(CommandBuffer cmd, RTHandle source, Vector4 scaleBias, float mipLevel, bool bilinear)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Copying is performed using the blit shader passed as the first argument of the Initialize(Shader, Shader) method.

This overload is meant for textures and render targets which depend on XR output modes by proper handling, when necessary, of left / right eye data copying. This generally correspond to textures which represent full screen data that may differ between eyes.

Examples

// Copy the bottom left quadrant of the source texture to the render target using bilinear
// sampling, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture(cmd, source, new Vector4(0.5, 0.5, 0, 0), 0, true);

// Copy the top half of the source texture's mip level 4 to the render target using nearest
// sampling, scaling to the destination render target's full rectangle.
Blitter.BlitTexture(cmd, source, new Vector4(1, 0.5, 0, 0.5), 4, false);

BlitTexture(CommandBuffer, RTHandle, Vector4, Material, int)

Adds in a CommandBuffer a command to copy a texture identified by its RTHandle into the currently bound render target's color buffer, using a user material and specific shader pass.

Declaration

public static void BlitTexture(CommandBuffer cmd, RTHandle source, Vector4 scaleBias, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

The source texture will be bound to the "_BlitTexture" shader property. The scaleBias parameter controls the rectangle of pixels in the source texture to copy by manipulating the source texture coordinates. The X and Y coordinates store the scaling factor to apply to these texture coordinates, while the Z and W coordinates store the texture coordinate offsets. The operation will always write to the full destination render target rectangle.

Examples

// Copy the bottom left quadrant of the source texture to the render target using the first
// pass of a custom material, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture(cmd, source, new Vector4(0.5, 0.5, 0, 0), blitMaterial, 0);

// Copy the top half of the source texture mip level 4 to the render target using the
// second pass of a custom material, scaling to the destination render target's full
// rectangle.
Blitter.BlitTexture(cmd, source, new Vector4(1, 0.5, 0, 0.5), blitMaterial, 1);

BlitTexture(CommandBuffer, RenderTargetIdentifier, RenderTargetIdentifier, Material, int)

Adds in a CommandBuffer a command to copy a texture identified by its RenderTargetIdentifier into a destination render target, using a user material and specific shader pass.

Declaration

public static void BlitTexture(CommandBuffer cmd, RenderTargetIdentifier source, RenderTargetIdentifier destination, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RenderTargetIdentifier	source	RenderTargetIdentifier of the source texture to copy from.
RenderTargetIdentifier	destination	RenderTargetIdentifier of the destination render target to copy to.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

he source texture will be bound to the "_BlitTexture" shader property.

This overload is equivalent to BlitTexture(CommandBuffer, RenderTargetIdentifier, RenderTargetIdentifier, RenderBufferLoadAction, RenderBufferStoreAction, Material, int) with the loadAction set to Load and the storeAction set to Store.

Examples

// Do a full copy of a source texture to a destination render target using the first pass
// of a custom material, scaling to the destination render target's full rectangle.
Blitter.BlitTexture(cmd, source, dest, blitMaterial, 0);

BlitTexture(CommandBuffer, RenderTargetIdentifier, RenderTargetIdentifier, RenderBufferLoadAction, RenderBufferStoreAction, Material, int)

Adds in a CommandBuffer a command to copy a texture identified by its RenderTargetIdentifier into a destination render target, using a user material, specific shader pass and specific load / store actions.

Declaration

public static void BlitTexture(CommandBuffer cmd, RenderTargetIdentifier source, RenderTargetIdentifier destination, RenderBufferLoadAction loadAction, RenderBufferStoreAction storeAction, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RenderTargetIdentifier	source	RenderTargetIdentifier of the source texture to copy from.
RenderTargetIdentifier	destination	RenderTargetIdentifier of the destination render target to copy to.
RenderBufferLoadAction	loadAction	Load action to perform on the destination render target prior to the copying.
RenderBufferStoreAction	storeAction	Store action to perform on the destination render target after the copying.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

The source texture will be bound to the "_BlitTexture" shader property.

Examples

// Do a full copy of a source texture to a destination render target using the first pass
// of a custom material, scaling to the destination render target's full rectangle. Since
// the destination will be overwritten, mark the load action as "Don't care".
Blitter.BlitTexture(cmd, source, dest, RenderBufferLoadAction.DontCare, RenderBufferStoreAction.Store, blitMaterial, 0);

BlitTexture(CommandBuffer, RenderTargetIdentifier, Vector4, Material, int)

Adds in a CommandBuffer a command to copy a texture identified by its RenderTargetIdentifier into the currently bound render target's color buffer, using a user material and specific shader pass.

Declaration

public static void BlitTexture(CommandBuffer cmd, RenderTargetIdentifier source, Vector4 scaleBias, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RenderTargetIdentifier	source	RenderTargetIdentifier of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

Examples

// Copy the bottom left quadrant of the source texture to the render target using the first
// pass of a custom material, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture(cmd, source, new Vector4(0.5, 0.5, 0, 0), blitMaterial, 0);

// Copy the top half of the source texture mip level 4 to the render target using the
// second pass of a custom material, scaling to the destination render target's full
// rectangle.
Blitter.BlitTexture(cmd, source, new Vector4(1, 0.5, 0, 0.5), blitMaterial, 1);

BlitTexture(CommandBuffer, Vector4, Material, int)

Adds in a CommandBuffer a command to draw a full screen quad, using a user material and specific shader pass.

Declaration

public static void BlitTexture(CommandBuffer cmd, Vector4 scaleBias, Material material, int pass)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
Vector4	scaleBias	Scale and bias for sampling the source texture.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

This method gives you freedom on how to write your blit shader by just taking a material, assumed to be properly configured with input textures already bound to the material. In this method, the "_BlitScaleBias" shader property will be set on the material to the scaleBias parameter, prior to the draw.

BlitTexture(RasterCommandBuffer, RTHandle, Vector4, float, bool)

Adds in a RasterCommandBuffer a command to copy an XR compatible texture identified by its RTHandle into the currently bound render target's color buffer.

Declaration

public static void BlitTexture(RasterCommandBuffer cmd, RTHandle source, Vector4 scaleBias, float mipLevel, bool bilinear)

Parameters

Type	Name	Description
RasterCommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Copying is performed using the blit shader passed as the first argument of the Initialize(Shader, Shader) method.

Examples

// Copy the bottom left quadrant of the source texture to the render target using bilinear
// sampling, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture(cmd, source, new Vector4(0.5, 0.5, 0, 0), 0, true);

// Copy the top half of the source texture's mip level 4 to the render target using nearest
// sampling, scaling to the destination render target's full rectangle.
Blitter.BlitTexture(cmd, source, new Vector4(1, 0.5, 0, 0.5), 4, false);

BlitTexture(RasterCommandBuffer, RTHandle, Vector4, Material, int)

Adds in a RasterCommandBuffer a command to copy a texture identified by its RTHandle into the currently bound render target's color buffer, using a user material and specific shader pass.

Declaration

public static void BlitTexture(RasterCommandBuffer cmd, RTHandle source, Vector4 scaleBias, Material material, int pass)

Parameters

Type	Name	Description
RasterCommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

Examples

// Copy the bottom left quadrant of the source texture to the render target using the first
// pass of a custom material, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture(cmd, source, new Vector4(0.5, 0.5, 0, 0), blitMaterial, 0);

// Copy the top half of the source texture mip level 4 to the render target using the
// second pass of a custom material, scaling to the destination render target's full
// rectangle.
Blitter.BlitTexture(cmd, source, new Vector4(1, 0.5, 0, 0.5), blitMaterial, 1);

BlitTexture(RasterCommandBuffer, RenderTargetIdentifier, Vector4, Material, int)

Adds in a RasterCommandBuffer a command to copy a texture identified by its RenderTargetIdentifier into the currently bound render target's color buffer, using a user material and specific shader pass.

Declaration

public static void BlitTexture(RasterCommandBuffer cmd, RenderTargetIdentifier source, Vector4 scaleBias, Material material, int pass)

Parameters

Type	Name	Description
RasterCommandBuffer	cmd	Command Buffer used for recording the action.
RenderTargetIdentifier	source	RenderTargetIdentifier of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

Examples

// Copy the bottom left quadrant of the source texture to the render target using the first
// pass of a custom material, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture(cmd, source, new Vector4(0.5, 0.5, 0, 0), blitMaterial, 0);

// Copy the top half of the source texture mip level 4 to the render target using the
// second pass of a custom material, scaling to the destination render target's full
// rectangle.
Blitter.BlitTexture(cmd, source, new Vector4(1, 0.5, 0, 0.5), blitMaterial, 1);

BlitTexture(RasterCommandBuffer, Vector4, Material, int)

Adds in a CommandBuffer a command to draw a full screen quad, using a user material and specific shader pass.

Declaration

public static void BlitTexture(RasterCommandBuffer cmd, Vector4 scaleBias, Material material, int pass)

Parameters

Type	Name	Description
RasterCommandBuffer	cmd	Command Buffer used for recording the action.
Vector4	scaleBias	Scale and bias for sampling the source texture.
Material	material	The material to use for writing to the destination target.
int	pass	The index of the pass to use in the material's shader.

Remarks

BlitTexture2D(CommandBuffer, RTHandle, Vector4, float, bool)

Adds in a CommandBuffer a command to copy a texture identified by its RTHandle into the currently bound render target's color buffer.

Declaration

public static void BlitTexture2D(CommandBuffer cmd, RTHandle source, Vector4 scaleBias, float mipLevel, bool bilinear)

Parameters

Type	Name	Description
CommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Copying is performed using the blit shader passed as the first argument of the Initialize(Shader, Shader) method.

Examples

// Copy the bottom left quadrant of the source texture to the render target using bilinear
// sampling, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture2D(cmd, source, new Vector4(0.5, 0.5, 0, 0), 0, true);

// Copy the top half of the source texture's mip level 4 to the render target using nearest
// sampling, scaling to the destination render target's full rectangle.
Blitter.BlitTexture2D(cmd, source, new Vector4(1, 0.5, 0, 0.5), 4, false);

BlitTexture2D(RasterCommandBuffer, RTHandle, Vector4, float, bool)

Adds in a RasterCommandBuffer a command to copy a texture identified by its RTHandle into the currently bound render target's color buffer.

Declaration

public static void BlitTexture2D(RasterCommandBuffer cmd, RTHandle source, Vector4 scaleBias, float mipLevel, bool bilinear)

Parameters

Type	Name	Description
RasterCommandBuffer	cmd	Command Buffer used for recording the action.
RTHandle	source	RTHandle of the source texture to copy from.
Vector4	scaleBias	Scale and bias for sampling the source texture.
float	mipLevel	Mip level of the source texture to copy from.
bool	bilinear	Enable bilinear filtering when copying.

Remarks

Copying is performed using the blit shader passed as the first argument of the Initialize(Shader, Shader) method.

Examples

// Copy the bottom left quadrant of the source texture to the render target using bilinear
// sampling, scaling to the destination render target's full rectangle.
// Configure the scale value to 0.5 because a quadrant has half the width and half the
// height of the texture, and the bias to 0 because the texture coordinate origin is at
// the bottom left.
Blitter.BlitTexture2D(cmd, source, new Vector4(0.5, 0.5, 0, 0), 0, true);

// Copy the top half of the source texture's mip level 4 to the render target using nearest
// sampling, scaling to the destination render target's full rectangle.
Blitter.BlitTexture2D(cmd, source, new Vector4(1, 0.5, 0, 0.5), 4, false);

Cleanup()

Releases all the internal Blitter resources. Must be called when the Blitter object is to be disposed.

Declaration

public static void Cleanup()

GetBlitMaterial(TextureDimension, bool)

Returns the default blit material constructed from the blit shader passed as the first argument of the Initialize(Shader, Shader) method.

Declaration

public static Material GetBlitMaterial(TextureDimension dimension, bool singleSlice = false)

Parameters

Type	Name	Description
TextureDimension	dimension	Dimension of the texture to blit, either 2D or 2D Array.
bool	singleSlice	Blit only a single slice of the array if applicable.

Returns

Type	Description
Material	The default blit material for the specified arguments.

Initialize(Shader, Shader)

Initializes the Blitter resources. This must be called once before any use.

Declaration

public static void Initialize(Shader blitPS, Shader blitColorAndDepthPS)

Parameters

Type	Name	Description
Shader	blitPS	The shader to use when using the blitting / copying methods which operate only on color.
Shader	blitColorAndDepthPS	The shader to use when using the BlitColorAndDepth methods which operate on both color and depth.

Remarks

Shaders sent to the blitPS parameter should support multiple passes with the corresponding name:

Nearest
Bilinear
NearestQuad
BilinearQuad
NearestQuadPadding
BilinearQuadPadding
NearestQuadPaddingRepeat
BilinearQuadPaddingRepeat
BilinearQuadPaddingOctahedral
NearestQuadPaddingAlphaBlend
BilinearQuadPaddingAlphaBlend
NearestQuadPaddingAlphaBlendRepeat
BilinearQuadPaddingAlphaBlendRepeat
BilinearQuadPaddingAlphaBlendOctahedral
CubeToOctahedral
CubeToOctahedralLuminance
CubeToOctahedralAlpha
CubeToOctahedralRed
BilinearQuadLuminance
BilinearQuadAlpha
BilinearQuadRed
NearestCubeToOctahedralPadding
BilinearCubeToOctahedralPadding

Basic vertex and fragment shader functions are available in Packages/com.unity.render-pipelines.core/Runtime/Utilities/Blit.hlsl for each of these pass types. Similarly, the shaders for the blitColorAndDepthPS parameter should support two passes with these names:

ColorOnly
ColorAndDepth

Examples

Blit color shader for URP which implements all the above passes with a user defined FragmentURPBlit fragment function to support debug passes and color space conversion.

Shader "Hidden/Universal/CoreBlit"
{
    HLSLINCLUDE
        #pragma target 2.0
        #pragma editor_sync_compilation
        // Core.hlsl for XR dependencies
        #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
        #include "Packages/com.unity.render-pipelines.core/Runtime/Utilities/Blit.hlsl"
        // DebuggingFullscreen.hlsl for URP debug draw
        #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Debug/DebuggingFullscreen.hlsl"
        // Color.hlsl for color space conversion
        #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
    // Specialized blit with URP debug draw support and color space conversion support
    half4 FragmentURPBlit(Varyings input, SamplerState blitsampler)
    {
        half4 color = FragBlit(input, blitsampler);

        #ifdef _LINEAR_TO_SRGB_CONVERSION
        color = LinearToSRGB(color);
        #endif

        #if defined(DEBUG_DISPLAY)
        half4 debugColor = 0;
        float2 uv = input.texcoord;
        if (CanDebugOverrideOutputColor(color, uv, debugColor))
        {
            return debugColor;
        }
        #endif

        return color;
    }
ENDHLSL

SubShader
{
    Tags{ "RenderPipeline" = "UniversalPipeline" }

    // 0: Nearest
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "Nearest"

        HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment FragNearest
        ENDHLSL
    }

    // 1: Bilinear
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "Bilinear"

        HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment FragBilinear
        ENDHLSL
    }

    // 2: Nearest quad
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "NearestQuad"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragNearest
        ENDHLSL
    }

    // 3: Bilinear quad
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuad"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragBilinear
        ENDHLSL
    }

    // 4: Nearest quad with padding
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "NearestQuadPadding"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragNearest
        ENDHLSL
    }

    // 5: Bilinear quad with padding
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuadPadding"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragBilinear
        ENDHLSL
    }

    // 6: Nearest quad with padding and repeat
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "NearestQuadPaddingRepeat"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragNearestRepeat
        ENDHLSL
    }

    // 7: Bilinear quad with padding and repeat
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuadPaddingRepeat"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragBilinearRepeat
        ENDHLSL
    }

    // 8: Bilinear quad with padding (for OctahedralTexture)
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuadPaddingOctahedral"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragOctahedralBilinearRepeat
        ENDHLSL
    }

    /// Version 4, 5, 6, 7 with Alpha Blending 0.5
    // 9: Nearest quad with padding alpha blend (4 with alpha blend)
    Pass
    {
        ZWrite Off ZTest Always Blend DstColor Zero Cull Off
        Name "NearestQuadPaddingAlphaBlend"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragNearest
            #define WITH_ALPHA_BLEND
        ENDHLSL
    }

    // 10: Bilinear quad with padding alpha blend (5 with alpha blend)
    Pass
    {
        ZWrite Off ZTest Always Blend DstColor Zero Cull Off
        Name "BilinearQuadPaddingAlphaBlend"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragBilinear
            #define WITH_ALPHA_BLEND
        ENDHLSL
    }

    // 11: Nearest quad with padding alpha blend repeat (6 with alpha blend)
    Pass
    {
        ZWrite Off ZTest Always Blend DstColor Zero Cull Off
        Name "NearestQuadPaddingAlphaBlendRepeat"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragNearestRepeat
            #define WITH_ALPHA_BLEND
        ENDHLSL
    }

    // 12: Bilinear quad with padding alpha blend repeat (7 with alpha blend)
    Pass
    {
        ZWrite Off ZTest Always Blend DstColor Zero Cull Off
        Name "BilinearQuadPaddingAlphaBlendRepeat"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragBilinearRepeat
            #define WITH_ALPHA_BLEND
        ENDHLSL
    }

    // 13: Bilinear quad with padding alpha blend (for OctahedralTexture) (8 with alpha blend)
    Pass
    {
        ZWrite Off ZTest Always Blend DstColor Zero Cull Off
        Name "BilinearQuadPaddingAlphaBlendOctahedral"

        HLSLPROGRAM
            #pragma vertex VertQuadPadding
            #pragma fragment FragOctahedralBilinearRepeat
            #define WITH_ALPHA_BLEND
        ENDHLSL
    }

    // 14. Project Cube to Octahedral 2d quad
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "CubeToOctahedral"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragOctahedralProject
        ENDHLSL
    }

    // 15. Project Cube to Octahedral 2d quad with luminance (grayscale), RGBA to YYYY
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "CubeToOctahedralLuminance"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragOctahedralProjectLuminance
        ENDHLSL
    }

    // 16. Project Cube to Octahedral 2d quad with with A to RGBA (AAAA)
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "CubeToOctahedralAlpha"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragOctahedralProjectAlphaToRGBA
        ENDHLSL
    }

    // 17. Project Cube to Octahedral 2d quad with with R to RGBA (RRRR)
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "CubeToOctahedralRed"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragOctahedralProjectRedToRGBA
        ENDHLSL
    }

    // 18. Bilinear quad with luminance (grayscale), RGBA to YYYY
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuadLuminance"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragBilinearLuminance
        ENDHLSL
    }

    // 19. Bilinear quad with A to RGBA (AAAA)
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuadAlpha"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragBilinearAlphaToRGBA
        ENDHLSL
    }

    // 20. Bilinear quad with R to RGBA (RRRR)
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearQuadRed"

        HLSLPROGRAM
            #pragma vertex VertQuad
            #pragma fragment FragBilinearRedToRGBA
        ENDHLSL
    }

    // 21. Nearest project cube to octahedral 2d quad with padding
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "NearestCubeToOctahedralPadding"

        HLSLPROGRAM
            #pragma multi_compile_local _ BLIT_DECODE_HDR
            #pragma vertex VertQuadPadding
            #pragma fragment FragOctahedralProjectNearestRepeat
        ENDHLSL
    }

    // 22. Bilinear project cube to octahedral 2d quad with padding
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "BilinearCubeToOctahedralPadding"

        HLSLPROGRAM
            #pragma multi_compile_local _ BLIT_DECODE_HDR
            #pragma vertex VertQuadPadding
            #pragma fragment FragOctahedralProjectBilinearRepeat
        ENDHLSL
    }

    // 23: Bilinear blit with debug draw and color space conversion support
    Pass
    {
        Name "BilinearDebugDraw"
        ZWrite Off ZTest Always Blend Off Cull Off

        HLSLPROGRAM
        #pragma vertex Vert
        #pragma fragment FragmentURPBlitBilinearSampler
        #pragma multi_compile_fragment _ _LINEAR_TO_SRGB_CONVERSION
        #pragma multi_compile_fragment _ DEBUG_DISPLAY

        half4 FragmentURPBlitBilinearSampler(Varyings input) : SV_Target
        {
            return FragmentURPBlit(input, sampler_LinearClamp);
        }
        ENDHLSL
    }

    // 24: Nearest blit with debug draw and color space conversion support
    Pass
    {
        Name "NearestDebugDraw"
        ZWrite Off ZTest Always Blend Off Cull Off

        HLSLPROGRAM
        #pragma vertex Vert
        #pragma fragment FragmentURPBlitPointSampler
        #pragma multi_compile_fragment _ _LINEAR_TO_SRGB_CONVERSION
        #pragma multi_compile_fragment _ DEBUG_DISPLAY

        half4 FragmentURPBlitPointSampler(Varyings input) : SV_Target
        {
            return FragmentURPBlit(input, sampler_PointClamp);
        }
        ENDHLSL
    }
}

Fallback Off

}

Blit color and depth shader for URP.

Shader "Hidden/Universal/CoreBlitColorAndDepth"
{
    HLSLINCLUDE
        #pragma target 2.0
        #pragma editor_sync_compilation
        // Core.hlsl for XR dependencies
        #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
        #include "Packages/com.unity.render-pipelines.core/Runtime/Utilities/BlitColorAndDepth.hlsl"
    ENDHLSL
SubShader
{
    Tags{ "RenderPipeline" = "UniversalPipeline" }

    // 0: Color Only
    Pass
    {
        ZWrite Off ZTest Always Blend Off Cull Off
        Name "ColorOnly"

        HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment FragColorOnly
        ENDHLSL
    }

    // 1:  Color Only and Depth
    Pass
    {
        ZWrite On ZTest Always Blend Off Cull Off
        Name "ColorAndDepth"

        HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment FragColorAndDepth
        ENDHLSL
    }
}

Fallback Off

}

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