love.graphics.setCanvas
| Available since LÖVE 0.8.0 |
| It has been renamed from love.graphics.setRenderTarget. |
Captures drawing operations to a Canvas.
Contents
Function
Sets the render target to a specified Canvas. All drawing operations until the next love.graphics.setCanvas call will be redirected to the Canvas and not shown on the screen.
When using a stencil or depth testing with an active Canvas, the stencil buffer or depth buffer must be explicitly enabled in setCanvas via the variants below.
Note that no canvas should be active when love.graphics.present is called. love.graphics.present is called at the end of love.draw in the default love.run, hence if you activate a canvas using this function, you normally need to deactivate it at some point before love.draw finishes.
Synopsis
love.graphics.setCanvas( canvas, mipmap )
Arguments
Canvas canvas- The new target.
Returns
Nothing.
Function
Resets the render target to the screen, i.e. re-enables drawing to the screen.
Synopsis
love.graphics.setCanvas( )
Arguments
None.
Returns
Nothing.
Function
| Available since LÖVE 0.9.0 |
| This variant is not supported in earlier versions. |
Sets the render target to multiple simultaneous 2D Canvases. All drawing operations until the next love.graphics.setCanvas call will be redirected to the specified canvases and not shown on the screen.
Synopsis
love.graphics.setCanvas( canvas1, canvas2, ... )
Arguments
Canvas canvas1- The first render target.
Canvas canvas2- The second render target.
Canvas ...- More canvases.
Returns
Nothing.
Notes
Normally all drawing operations will draw only to the first canvas passed to the function, but that can be changed if a pixel shader is used with the void effect function instead of the regular vec4 effect.
All canvas arguments must have the same widths and heights and the same texture type. Not all computers which support Canvases will support multiple render targets. If love.graphics.isSupported("multicanvas") returns true, at least 4 simultaneously active canvases are supported.
Function
| Available since LÖVE 11.0 |
| This variant is not supported in earlier versions. |
Sets the render target to the specified layer/slice and mipmap level of the given non-2D Canvas. All drawing operations until the next love.graphics.setCanvas call will be redirected to the Canvas and not shown on the screen.
Synopsis
love.graphics.setCanvas( canvas, slice, mipmap )
Arguments
Canvas canvas- The new render target.
number slice- For cubemaps this is the cube face index to render to (between 1 and 6). For Array textures this is the array layer. For volume textures this is the depth slice. 2D canvases should use a value of 1.
number mipmap (1)- The mipmap level to render to, for Canvases with mipmaps.
Returns
Nothing.
Function
| Available since LÖVE 11.0 |
| This variant is not supported in earlier versions. |
Sets the active render target(s) and active stencil and depth buffers based on the specified setup information. All drawing operations until the next love.graphics.setCanvas call will be redirected to the specified Canvases and not shown on the screen.
Synopsis
love.graphics.setCanvas( setup )
Arguments
table setup- A table specifying the active Canvas(es), their mipmap levels and active layers if applicable, and whether to use a stencil and/or depth buffer.
RenderTargetSetup [1]- The Canvas to render to.
RenderTargetSetup [2] (nil)- An additional Canvas to render to, if multiple simultaneous render targets are wanted.
RenderTargetSetup ...- Additional Canvases to render to, if multiple simultaneous render targets are wanted.
boolean stencil (false)- Whether an internally managed stencil buffer should be used, if the
depthstencilfield isn't set. boolean depth (false)- Whether an internally managed depth buffer should be used, if the
depthstencilfield isn't set. RenderTargetSetup depthstencil (nil)- An optional custom depth/stencil formatted Canvas to use for the depth and/or stencil buffer.
Returns
Nothing.
Notes
The RenderTargetSetup parameters can either be a Canvas object, or a table in the following format: {canvas, mipmap=#, layer=#, face=#}
Canvas [1]- The Canvas to use for this active render target.
number mipmap (1)- The mipmap level to render to, for Canvases with mipmaps.
number layer (1)- Only used for Volume and Array-type Canvases. For Array textures this is the array layer to render to. For volume textures this is the depth slice.
number face (1)- Only used for Cubemap-type Canvases. The cube face index to render to (between 1 and 6)
Examples
Drawing to a canvas
function love.load()
-- create canvas
canvas = love.graphics.newCanvas()
-- direct drawing operations to the canvas
love.graphics.setCanvas(canvas)
-- draw colored square to canvas
love.graphics.setColor(0.8, 0.9, 0.4)
love.graphics.rectangle("fill", 0, 0, 100, 100)
-- re-enable drawing to the main screen
love.graphics.setCanvas()
end
function love.draw()
-- draw scaled canvas to screen
love.graphics.setColor(1, 1, 1)
love.graphics.draw(canvas, 200, 100, 0, 0.5, 0.5)
end
Advanced setup with the table variant of love.graphics.setCanvas
-- Allow love.graphics.stencil calls when drawing to the given Canvas.
love.graphics.setCanvas({canvas, stencil=true})
-- Use multiple simultaneous render targets when drawing to several canvases of the Array Texture type,
-- and use a custom depth buffer as well.
canvas1 = love.graphics.newCanvas(128, 128, 4, {type="array"})
canvas2 = love.graphics.newCanvas(128, 128, 8, {type="array"})
depthcanvas = love.graphics.newCanvas(128, 128, {format="depth24", readable=true})
love.graphics.setCanvas({
{canvas1, layer = 3},
{canvas2, layer = 1},
depthstencil = depthcanvas,
})
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