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Neil Ireson updated SOLR-8197: ------------------------------ Attachment: transparency.patch > Make zero counts in heatmap PNG transparent > ------------------------------------------- > > Key: SOLR-8197 > URL: https://issues.apache.org/jira/browse/SOLR-8197 > Project: Solr > Issue Type: Improvement > Reporter: Neil Ireson > Priority: Minor > Attachments: transparency.patch > > > It would be useful to have transparent zero values so that I can overlay the > image as a layer on a map. > The change just requires altering two methods in SpatialHeatmapFacets.java as > follows: > {code} > static void writeCountAtColumnRow(BufferedImage image, int rows, int c, int > r, int val) > { > image.setRGB(c, rows - 1 - r, val == 0 ? 0 : val ^ 0xFF_00_00_00); > } > static int getCountAtColumnRow(BufferedImage image, int rows, int c, int r) > { > int val = image.getRGB(c, rows - 1 - r); > return val == 0 ? 0 : val ^ 0xFF_00_00_00; > } > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org