Wiki page mask changed with summary [refactoring developer docs] by Andrew Williams
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Go back to [[:docs:efl:advanced:eflgfxfilters|Efl.Gfx.Filter]].
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==== Masking and texturing ====
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The ''mask'' function is used to blend together 3 buffers instead of just two. As such this means input ''A'' can be masked by input ''B'' and blended on target ''C''.
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''mask'' can be used to apply textures to text characters or apply alpha masks to RGBA buffers.
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== Syntax ==
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<code Lua>
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mask ({ mask, src = input, dst = output, color = 'white', fillmode = 'repeat' })
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</code>
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== Parameters ==
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|''mask'' |A mask or texture to blend with the input src into the target dst. |
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|''src'' |Source buffer. This can also be thought of a mask if src is alpha and mask is RGBA. |
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|''dst'' |Destination buffer for blending. This must be of same size and colorspace as src. |
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|''color'' |A color to use for alpha to RGBA conversion for the blend operations. White means no change. See [[colors]]. \\ This will have no effect on RGBA sources. |
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|''fillmode'' |Defines whether to stretch or repeat the mask if its size differs from the ''input'' size. \\ Should be set when masking with external textures. Default is ''"repeat"''. See [[fillmodes]]. |
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== Examples ==
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This example requires an external object named ''"image1"'':
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<code Lua texturing.lua>
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mask { mask = 'image1', fillmode = 'stretch' }
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</code>
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{{:docs:efl:advanced:filter-mask.png|}}
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The following example does not require any external texture:
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<code Lua innershadow.lua>
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a = buffer ('alpha')
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blur ({ 6, dst = a })
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p = {}
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p[0] = 255
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p[128] = 255
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p[255] = 0
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curve ({ points = p, src = a, dst = a })
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blend ({ color = 'black' })
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mask ({ mask = a, color = 'cyan' })
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</code>
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{{:docs:efl:advanced:filter-innershadow.png|}}
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