Bug report #2491
Raster transparency doesn't handle alpha channel
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Rasters | ||
| Affected QGIS version: | Regression?: | No | |
| Operating System: | All | Easy fix?: | No |
| Pull Request or Patch supplied: | Yes | Resolution: | fixed |
| Crashes QGIS or corrupts data: | Copied to github as #: | 12551 |
Description
Open a GeoTIFF with the aplha channel. No transparency occurs. In the layer properities all 4 channels are available for the color composition, but the 'transparency channel' combobox on the Transparency tab is disabled.
Related issues
Associated revisions
Handle raster layer's transparency band while rendering (fix #2491)
Handle raster layer's transparency band while rendering (fix #2491)
History
#1
Updated by Alister Hood over 13 years ago
- Assignee deleted (
nobody -) - Pull Request or Patch supplied set to No
- Operating System changed from Debian to All
- Target version deleted (
Version 1.7.0) - Priority changed from Low to Normal
The same problem occurs for grayscale images with an alpha channel, and in Windows. An example image is attached at #4159.
#2
Updated by Alister Hood about 13 years ago
I remember some conjecture on the mailing list that this is simply a new feature which hasn't been implemented yet.
But apparently it was implemented even before the "pixel list" transparency by colour: #288-6
#3
Updated by Giuseppe Sucameli about 13 years ago
- Pull Request or Patch supplied changed from No to Yes
Here's the pull request: https://github.com/qgis/Quantum-GIS/pull/52
#4
Updated by Alexander Bruy about 13 years ago
- Resolution set to fixed
- Status changed from Open to Closed
Applied in b0112f1c42.