How to crop some region of image in Gideros?

wretch · May 2013

Hi,
any way to do that?

I tried this:

myMask:clear()
myMask:setFillStyle(Shape.TEXTURE, texture)
myMask:beginPath()
myMask:moveTo(50,0)
myMask:lineTo(100,0)
myMask:lineTo(100,50)
myMask:lineTo(50,50)
myMask:closePath()
myMask:endPath()

It works, but the rest of the image is still "there", but i only want whats inside the mask as a new image.

Cheers!

ar2rsawseen · May 2013

Helo @wretch
can you show a screenshot or something similar explaining how it is now and how you want it?

OZApps · May 2013

@wretch for that you need is

renderToTexture()

which should be added soon, as we are told with the new release (any time soon)

@ar2rsawseen, The sample above could be used if there is some functionality to be able to position the texture than just use it to fill.

ar2rsawseen · May 2013

@OZApps oh but there is, using a matrix.

It should be something like this:

local tx = -10 --x offset
local ty = -10 --y offset
local matrix = Matrix.new(1, 0, 0, 1, tx, ty)
local shape = Shape.new()
shape:setFillStyle(Shape.TEXTURE, texture, matrix)

OZApps · May 2013

@ar2rsawseen, will have a look at that...

OZApps · May 2013

and you might want to fix the matrix props image on the docs page, matrix_props.png

ar2rsawseen · May 2013

Thanks, fixed

wretch · May 2013

First, wow. I'm really impressed. So quick and competent responses!

@ar2rsawseen
Perfect. Using a matrix was the hint i needed. It works now. Thanks again.

recthor · June 2013

I can share with you my way to do that. I use an imaging sdk found on the internet which can crop images . Install it and it becomes a selectable processing option.Then you can crop images in any program at all, including Adobe Acrobat . Just open the images, select crop ,and follow the setps given in the sdk, the task will be finished in several seconds. if you haven't found a good choice , you can have a try. best wishes.
http://www.rasteredge.com/how-to/vb-net-imaging/crop-image/

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