Difference between revisions of "ImageData"
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You can't draw ImageData directly to screen. See [[Image]] for that. | You can't draw ImageData directly to screen. See [[Image]] for that. | ||
== Functions == | == Functions == | ||
− | {{#ask: [[Category:Functions]] [[parent::ImageData]] | + | {{#ask: [[Category:Functions]] [[parent::ImageData]] OR [[Category:Functions]] [[parent::Data]] OR [[Category:Functions]] [[parent::Object]] |
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| headers=hide | | headers=hide | ||
| ?Description | | ?Description | ||
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* [[Image]] | * [[Image]] | ||
[[Category:Types]] | [[Category:Types]] | ||
− | {{#set:Description=Raw (decoded) image data. | + | {{#set:Description=Raw (decoded) image data.}} |
− | }} | ||
== Other Languages == | == Other Languages == | ||
{{i18n|ImageData}} | {{i18n|ImageData}} |
Revision as of 20:33, 20 February 2011
Raw (decoded) image data.
You can't draw ImageData directly to screen. See Image for that.
Contents
Functions
Data:clone | Creates a new copy of the Data object. |
Data:getFFIPointer | Gets an FFI pointer to the Data. |
Data:getPointer | Gets a pointer to the Data. |
Data:getSize | Gets the Data's size in bytes. |
Data:getString | Gets the full Data as a string. |
ImageData:encode | Encodes the ImageData to a file format and optionally writes it to the save directory. |
ImageData:getDimensions | Gets the width and height of the ImageData in pixels. |
ImageData:getFormat | Gets the pixel format of the ImageData. |
ImageData:getHeight | Gets the height of the ImageData in pixels. |
ImageData:getPixel | Gets the color of a pixel. |
ImageData:getString | Gets the full ImageData as a string. |
ImageData:getWidth | Gets the width of the ImageData in pixels. |
ImageData:mapPixel | Transform an image by applying a function to every pixel. |
ImageData:paste | Paste into ImageData from another source ImageData. |
ImageData:setPixel | Sets the color of a pixel. |
Object:release | Immediately destroys the object's Lua reference. |
Object:type | Gets the type of the object as a string. |
Object:typeOf | Checks whether an object is of a certain type. |
Examples
Images that have dimensions that are not a 2^n will display incorrectly as a white rectangle on some graphics chipsets. This function pads images so they will display correctly.
function newPaddedImage(filename)
local source = love.image.newImageData(filename)
local w, h = source:getWidth(), source:getHeight()
-- Find closest power-of-two.
local wp = math.pow(2, math.ceil(math.log(w)/math.log(2)))
local hp = math.pow(2, math.ceil(math.log(h)/math.log(2)))
-- Only pad if needed:
if wp ~= w or hp ~= h then
local padded = love.image.newImageData(wp, hp)
padded:paste(source, 0, 0)
return love.graphics.newImage(padded)
end
return love.graphics.newImage(source)
end
Supertypes
See Also
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