Difference between revisions of "ImageData:getPixel"
m |
(→Function: Added notice to input parameters not being interpolated, to thwart any assumptions.) |
||
Line 8: | Line 8: | ||
</source> | </source> | ||
=== Arguments === | === Arguments === | ||
− | {{param|number|x|The position of the pixel on the x-axis.}} | + | {{param|number|x|The position of the pixel on the x-axis. Values are not interpolated, so use whole numbers only.}} |
− | {{param|number|y|The position of the pixel on the y-axis.}} | + | {{param|number|y|The position of the pixel on the y-axis. Values are not interpolated, so use whole numbers only.}} |
=== Returns === | === Returns === | ||
{{param|number|r|The red component (0-255).}} | {{param|number|r|The red component (0-255).}} | ||
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 == | == Examples == | ||
Iterates over the pixels of an image and stores them in a [[sequence]]. | Iterates over the pixels of an image and stores them in a [[sequence]]. |
Revision as of 18:52, 15 January 2017
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
number x
- The position of the pixel on the x-axis. Values are not interpolated, so use whole numbers only.
number y
- The position of the pixel on the y-axis. Values are not interpolated, so use whole numbers only.
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
Dansk –
Deutsch –
English –
Español –
Français –
Indonesia –
Italiano –
Lietuviškai –
Magyar –
Nederlands –
Polski –
Português –
Română –
Slovenský –
Suomi –
Svenska –
Türkçe –
Česky –
Ελληνικά –
Български –
Русский –
Српски –
Українська –
עברית –
ไทย –
日本語 –
正體中文 –
简体中文 –
Tiếng Việt –
한국어
More info