comp-op

dummy.png

output.png

p.png

p.tiff

pattern.png

style.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map[]>
<Map background-image="../../data/images/pattern.png">
  <Parameters>
    <Parameter name="sizes">512,512</Parameter>
    <Parameter name="bbox">-1,-1,1,1</Parameter>
  </Parameters>

  <Style name="pozadi">
    <Rule>
        <PolygonPatternSymbolizer file="../../data/images/dummy.png" />
    </Rule>
  </Style>

  <Style name="style">
      <Rule>
          <RasterSymbolizer>
              <RasterColorizer default-mode="linear">
                  <stop color="rgba(0, 0, 0, 0)" value="0"/>
                  <stop color="rgba(0, 0, 0, 255)" value="200"/>
              </RasterColorizer>
          </RasterSymbolizer>
      </Rule>
  </Style>

  <Layer name="pozadi" comp-op="src-over">
      <StyleName>pozadi</StyleName>
      <Datasource>
          <Parameter name="inline">
                  wkt
                  "POLYGON((-1 -1, -1 1, 1 1, 1 -1, -1 -1))"
          </Parameter>
         <Parameter name="type">csv</Parameter>
      </Datasource>

      <Layer name="style" comp-op="dst-in">
          <StyleName>style</StyleName>
          <Datasource>
              <Parameter name="file">p.tiff</Parameter>
              <Parameter name="band">1</Parameter>
              <Parameter name="type">gdal</Parameter>
          </Datasource>
      </Layer>
  </Layer>

</Map>