Bug report #7461
'difference' blending mode not correctly rendered on a qgis composer map item (but exports properly)
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: |  Nyall Dawson | ||
| Category: | - | ||
| Affected QGIS version: | master | Regression?: | No |
| Operating System: | all | Easy fix?: | No |
| Pull Request or Patch supplied: | No | Resolution: | |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 16416 |
Description
1. Open the attached QGIS project (test-blend.zip)
2. Have a look at beautiful rendering of raster heatmap (with 'difference' blend mode) over streets vector
3. Open print composer 'Composer 1'
4. Notice how the composer's map item has it all wrong, as if the raster black to white was reversed, or the layer order switched
If the user exports the composer to a PNG, the exported map is rendering properly. There's only an issue with the composer's map item preview. Also, other blend modes, like multiply, are not triggering this bug.
Associated revisions
Draw background on painter before rendering map for composer map items (fix #7461)
History
#1
Updated by Nyall Dawson over 11 years ago
- Assignee set to Nyall Dawson
- Status changed from Open to In Progress
#2
Updated by Nyall Dawson over 11 years ago
- Status changed from In Progress to Closed
Fixed in changeset e6f3b2e0086bbfc3beed57855c1ec4b024ccd35d.