Fix NoData handling in the ColorMethods.color function for the RGB and RGBA Multiband Rasters #3278
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| var transparent = true | ||
| val r = if (isData(rBand)) { transparent = false; rBand } else 0 | ||
| val g = if (isData(gBand)) { transparent = false; gBand } else 0 | ||
| val b = if (isData(bBand)) { transparent = false; bBand } else 0 | ||
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| if(r + g + b == 0) 0 | ||
| else { | ||
| ((r & 0xFF) << 24) | ((g & 0xFF) << 16) | ((b & 0xFF) << 8) | 0xFF | ||
| } | ||
| if(transparent) 0 | ||
| else ((r & 0xFF) << 24) | ((g & 0xFF) << 16) | ((b & 0xFF) << 8) | 0xFF |
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I wanted to make this "transparency" detection cheaper, since this function is applied to all pixels of the raster.
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This was referenced Aug 1, 2020
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CloudNiner
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Overview
This PR fixes the NoData interpretation by the
ColorMethods.colorfunction.With the current fix for RGBA Rasters the zero would be set only in case the alpha channel is set to 0 as well.
In the RGB case, the alpha channel would be set to zero only when all the 3 bands are filled with nodata values.
Checklist
Fix #3203