Hugo Mercier 845894b313
[FEATURE] Selective masking (#30747)
* [FEATURE] Selective masking

Advanced rendering feature that allows the definition of 'masks' areas around labels or with a new typ of symbol layer. These masks will "un-draw" symbol layers of other layers underneath.
It modifies the rendering process by adding an optional second pass.
2019-11-07 08:17:25 +01:00

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# Selective masking
Here are some detailed step-by-step examples of renderings with selective masking enabled.
Examples are taken from the tests and some intermediary images have been added to illustrate how the rendering works.
* [1 - Only labels mask other symbol layers](p1/README.md)
* [1b - Only labels mask other symbol layers (with symbol levels)](p1b/README.md)
* [2 - A symbol layer mask other symbol layers](p2/README.md)
* [3 - Merged masks](p3/README.md)
* [4 - Different masks on the same layer](p4/README.md)
* [5 - Different masks on the same layer (2)](p5/README.md)
* [6 - Label masks with effects](p6/README.md)