The `Disable tiled raster layer exports` option doesn't work

[MrChebur]

The Disable tiled raster layer exports option doesn't work:

This happens becauserasterize is not in the list of layout.customProperties()

if layout.customProperty("rasterize") in ["true", True]:
    exportSettings.rasterizeWholeImage = True

Here is full list of layout.customProperties():

 layout.customProperties() = ['atlasRasterFormat',
                                         'forceVector',
                                         'imageAntialias',
                                         'imageCropMarginBottom',
                                         'imageCropMarginLeft',
                                         'imageCropMarginRight',
                                         'imageCropMarginTop',
                                         'imageCropToContents',
                                         'pdfAppendGeoreference',
                                         'pdfCreateGeoPdf',
                                         'pdfDisableRasterTiles',
                                         'pdfExportThemes',
                                         'pdfIncludeMetadata',
                                         'pdfLayerOrder',
                                         'pdfLosslessImages',
                                         'pdfOgcBestPracticeFormat',
                                         'pdfSimplify',
                                         'pdfTextFormat',
                                         'singleFile',
                                         'variableNames',
                                         'variableValues']

So if you replace rasterize with pdfDisableRasterTiles it will work as expected.

https://github.com/DelazJ/MapsPrinter/blob/master/MapsPrinter/processor.py

if layout.customProperty("pdfDisableRasterTiles") in ["true", True]:
    exportSettings.rasterizeWholeImage = True

[DelazJ]

@MrChebur Are you sure we are referring to the same option?
If you check the "Print as raster" option in the "Export settings" group in Layout panel, you will see "rasterize" as part of layout.customProperties() result. And looking at rasterizeWholeImage docs, the behavior of that checkbox looks coherent to me.
Unless I misunderstood, I don't think pdfDisableRasterTiles has a corresponding export settings, but instead a flag and the flags should have been imported already.

MapsPrinter/MapsPrinter/processor.py

Lines 230 to 231 in 5c48114

	exportSettings = QgsLayoutExporter.PdfExportSettings()
	exportSettings.flags = layout.renderContext().flags()

See also https://github.com/qgis/QGIS/blob/74c474fd53a3214d408fe55d88472047137434e2/src/app/layout/qgslayoutdesignerdialog.cpp#L4455-L4479

[MrChebur]

@DelazJ
Perhaps I need to create a minimally reproducible example.

I have a WMS layer that, when manually exported to PDF, contains certain image artifacts (distortions) related to the 512x512 tile size. Enabling this option eliminates these artifacts.

My PDFs are created using your plugin. I tried to find a way to save them without this artifacts, but I couldn't. However, after I changed the option name as specified in the pull request, the problem went away. Now the PDFs are saved correctly.

I'll upload the project with the minimally reproducible data set tomorrow.

[MrChebur]

Ok, now I'm totally confused.

I'm having the same problem as described here (but I'm using QGIS desktop): qgis/QGIS#51238

This problem goes away if you manually set the Disable tiled raster layer exports GUI option.
It is not clear how to invoke such setting with your plugin.
If I add a line to your processing.py:

if layout.customProperty("pdfDisableRasterTiles"):
    exportSettings.rasterizeWholeImage = True

then the result of the pdf export is the same as with manual export.

From this I conclude that the pdfDisableRasterTiles checkbox and the rasterizeWholeImage option must be linked in your plugin.

I attach a zip archive with my test project .zip and the results of the PDF export.

I run testing script.py using the Python QGIS console to avoid unnecessary individual code snippets.