Add rasterization support for simple heatmap annotations#1260
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brandonlukas wants to merge 2 commits into
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Add rasterization support for simple heatmap annotations#1260brandonlukas wants to merge 2 commits into
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Previously only the heatmap body (matrix) supported rasterization via use_raster. This adds the same capability to simple annotations (vector/matrix values drawn as colored cells via anno_simple), reducing PDF/SVG file sizes for large annotations. Changes: - Add rasterize_in_viewport() helper to utils.R, encapsulating the temp-device rasterization pattern from draw_heatmap_body() - Add raster_param slot to SingleAnnotation class with use_raster, raster_device, raster_quality, and related parameters - Wrap annotation drawing in SingleAnnotation draw() with rasterization when use_raster=TRUE (annotation names remain vector graphics) - Pass raster params through HeatmapAnnotation constructor to each SingleAnnotation - Add annotation_use_raster global option to ht_opt Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When raster_quality > 1, the temp raster device grew in pixels but kept the default res=72, making its physical size (inches) grow proportionally. AnnotationFunction::draw() pushes a viewport with absolute units (e.g. unit(5, "mm")), which then only filled 1/raster_quality of the enlarged device, causing the annotation to appear vertically shrunken. Fix by scaling res with raster_quality so the device's physical size stays constant regardless of quality level. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Previously only the heatmap body (matrix) supported rasterization via use_raster. This adds the same capability to simple annotations (vector/matrix values drawn as colored cells via anno_simple), reducing PDF/SVG file sizes for large annotations.
Changes: