Add contour line label provider for raster layers - #3
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Introduces on-the-fly contour line labels for raster DEM layers using GDAL's contour generation API. Contour geometries are generated at render time and registered with the PAL labeling engine for placement along the lines. New classes: - QgsRasterContourLabelProvider: generates contour lines from raster data and registers them as label features - QgsRasterLayerContourLabeling: configuration class with text format, numeric format, thinning, and scale-based visibility settings The label provider reads band, contour interval, index interval, and downscale factor from QgsRasterContourRenderer (Symbology tab) to avoid settings duplication. Sketched-With: Claude <noreply@anthropic.com> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
QgsRasterContourLabelProvidergenerates contour geometries and registers them with the PAL labeling engineQgsRasterLayerContourLabelingconfiguration class with text format, numeric format, thinning, and scale-based visibilityAI tool usage
🤖 Generated with Claude Code