love.graphics.newPixelEffect
| Available since LÖVE 0.8.0 |
| This function is not supported in earlier versions. |
Creates a new PixelEffect object for hardware-accelerated pixel level effects.
A PixelEffect contains at least one function, named effect, which is the effect itself, but it can contain additional functions.
Contents
Function
Synopsis
pixeleffect = love.graphics.newPixelEffect( code )
Arguments
string code- The pixel effect code.
Returns
PixelEffect pixeleffect- A PixelEffect object for use in drawing operations.
Effect Language
Pixel effects are not programmed in Lua, but by using a special effect language instead. The effect language is basically [1.20] ([[1]]) with a few things renamed:
| GLSL | Effect language |
|---|---|
| float | number |
| sampler2D | Image |
| uniform | extern |
| texture2D(sampler2D tex, vec2 st) | Texel(Image tex, vec2 st) |
Effect Function
Synopsis
vec4 effect( vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords )
Arguments
vec4 color- The drawing color set with love.graphics.setColor.
Image texture- The texture of the image or canvas being drawn.
vec2 texture_coords- Coordinates of the pixel relative to the texture.
vec2 screen_coords- Coordinates of the pixel on the screen.
Returns
vec4 output_color- The color of the pixel.
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