Difference between revisions of "ImageData:getPixel"
(→Function: Added notice to input parameters not being interpolated, to thwart any assumptions.) |
(Have API docs describe what the API does (instead of what it doesn't do, or what the author thinks the user ought to do).) |
||
Line 1: | Line 1: | ||
Gets the color of a pixel at a specific position in the image. | 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. Non-integer values are floored. |
+ | {{notice|Prior to [[0.10.2]], this function does not properly handle non-integer coordinates, and may produce an invalid result when non-integer values are passed.}} | ||
== Function == | == Function == | ||
=== Synopsis === | === Synopsis === | ||
Line 8: | Line 9: | ||
</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.}} |
− | {{param|number|y|The position of the pixel on the y-axis | + | {{param|number|y|The position of the pixel on the y-axis.}} |
=== Returns === | === Returns === | ||
{{param|number|r|The red component (0-255).}} | {{param|number|r|The red component (0-255).}} |
Revision as of 18:35, 18 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. Non-integer values are floored.
Prior to 0.10.2, this function does not properly handle non-integer coordinates, and may produce an invalid result when non-integer values are passed. |
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
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