Difference between revisions of "ImageData:getPixel"
(Noting the ImageData pixel range) |
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− | Gets the pixel at the | + | Gets the color of a pixel at a specific position in the image. |
Valid x and y values start at 0 and go up to image width and height minus 1. | Valid x and y values start at 0 and go up to image width and height minus 1. | ||
Line 15: | Line 15: | ||
{{param|number|b|The blue component (0-255).}} | {{param|number|b|The blue component (0-255).}} | ||
{{param|number|a|The alpha component (0-255).}} | {{param|number|a|The alpha component (0-255).}} | ||
+ | == Examples == | ||
+ | Iterates over the pixels of an image and stores them in a [[sequence]]. | ||
+ | <source lang="lua"> | ||
+ | local image = love.image.newImageData( 'path/to/Image.png' ) | ||
+ | local pixels = {} | ||
+ | for x = 1, image:getWidth() do | ||
+ | for y = 1, image:getHeight() do | ||
+ | -- Pixel coordinates range from 0 to image width - 1 / height - 1. | ||
+ | local pixel = image:getPixel( x - 1, y - 1 ) | ||
+ | pixels[#pixels + 1] = pixel | ||
+ | end | ||
+ | end | ||
+ | return pixels; | ||
+ | </source> | ||
== See Also == | == See Also == | ||
* [[parent::ImageData]] | * [[parent::ImageData]] | ||
+ | * [[ImageData:setPixel]] | ||
[[Category:Functions]] | [[Category:Functions]] | ||
− | {{#set:Description=Gets the pixel | + | {{#set:Description=Gets the color of a pixel.}} |
{{#set:Since=000}} | {{#set:Since=000}} | ||
== Other Languages == | == Other Languages == | ||
{{i18n|ImageData:getPixel}} | {{i18n|ImageData:getPixel}} |
Revision as of 09:03, 1 June 2016
Gets the color of a pixel at a specific position in the image.
Valid x and y values start at 0 and go up to image width and height minus 1.
Function
Synopsis
r, g, b, a = ImageData:getPixel( x, y )
Arguments
Returns
number r
- The red component (0-255).
number g
- The green component (0-255).
number b
- The blue component (0-255).
number a
- The alpha component (0-255).
Examples
Iterates over the pixels of an image and stores them in a sequence.
local image = love.image.newImageData( 'path/to/Image.png' )
local pixels = {}
for x = 1, image:getWidth() do
for y = 1, image:getHeight() do
-- Pixel coordinates range from 0 to image width - 1 / height - 1.
local pixel = image:getPixel( x - 1, y - 1 )
pixels[#pixels + 1] = pixel
end
end
return pixels;
See Also
Other Languages
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