Feature request #7813

QGIS Blend Mode - Cut

Added by Patrice Vetsel - almost 4 years ago. Updated over 2 years ago.

Status:Open Start Date:05/12/2013
Priority:Normal Due date:
Assigned to:- % Done:

0%

Category:-
Target version:Future Release - High Priority
Platform: Resolution:
Platform version: Pull Request or Patch supplied:No
Status info: Tag:

Description

I need this "blend" mode :
  • cut

Using atlas generation, i need to have a cut blend mode to use a layer to select what to print or not.

un.JPG (194 kB) Patrice Vetsel -, 05/13/2013 12:56 am

deux.JPG (109.2 kB) Patrice Vetsel -, 05/13/2013 12:57 am

trois.JPG (174.4 kB) Patrice Vetsel -, 05/13/2013 12:57 am

quatre.JPG (140.6 kB) Patrice Vetsel -, 05/13/2013 12:57 am

cinq.JPG (159.1 kB) Patrice Vetsel -, 05/13/2013 12:58 am

History

Updated by Nathan Woodrow almost 4 years ago

Is this like a mask? If not could you provide an example.

Updated by Patrice Vetsel - almost 4 years ago

  • Target version set to Version 2.0.0

Updated by Patrice Vetsel - almost 4 years ago

Updated by Patrice Vetsel - almost 4 years ago

Updated by Patrice Vetsel - almost 4 years ago

Updated by Patrice Vetsel - almost 4 years ago

Updated by Patrice Vetsel - almost 4 years ago

Updated by Patrice Vetsel - almost 4 years ago

un.jpg
my desktop with layers. I will use 'Armoires" layer as layer for atlas generation
deux.jpg
the print composer
trois.jpg
one of the exported with atlas generation
quatre.jpg
same pdf but with 'Armoires' layer visible
cinq.jpg
the result of what I want. 'Armoires' is set to invisible, and I use the 'Cut' mode

In fact, this Cut mode could be also used under desktop to hide informations not needed. I know that I can use vector tools to draw a big polygone, substract my 'Armoires' layer from it and use it as a mask. But it's complicated and not ergonomic. A simple 'Cut' mode will be great !

Updated by Patrice Vetsel - almost 4 years ago

Nathan Woodrow wrote:

So it would be like these

http://mapbox.com/tilemill/docs/guides/comp-op/#alpha_blending

In fat yes ! It's Src-in and Src-out in alpha blending

Updated by Nyall Dawson almost 4 years ago

  • Assigned to set to Nyall Dawson

Updated by Paolo Cavallini about 3 years ago

  • Target version changed from Version 2.0.0 to Future Release - High Priority

Updated by Nyall Dawson over 2 years ago

  • Assigned to deleted (Nyall Dawson)

Updated by Andreas Neumann over 2 years ago

Can we close this feature request now that we have the inverted polygon renderer - which is even more powerful than what you ask for?

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