Examples of org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.renderImage()

Package org.geotools.renderer.lite.gridcoverage2d

Class org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer

Examples of org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.renderImage()

org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.renderImage()
Turns the coverage into a rendered image applying the necessary transformations and the symbolizer Builds a (RenderedImage, AffineTransform) pair that can be used for rendering onto a {@link Graphics2D} or as the basis to build a final image. Will return null if there isnothing to render. @param gridCoverage @param symbolizer @return The transformed image, or null if the coverage does not lie within the renderingbounds @throws Exception

        GridCoverageRenderer renderer = new GridCoverageRenderer(
                mapExtent.getCoordinateReferenceSystem(), mapExtent, screenSize, w2s);


        RasterSymbolizer rasterSymbolizer = buildRainColorMap();


        RenderedImage image = renderer.renderImage(rainReader, null, rasterSymbolizer, Interpolation.getInstance(Interpolation.INTERP_NEAREST),
                Color.RED, 256, 256);
        assertNotNull(image);
        File reference = new File(
                "src/test/resources/org/geotools/renderer/lite/gridcoverage2d/polar_whitecorner_up.png");
        ImageAssert.assertEquals(reference, image, 0);

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        GridCoverageRenderer renderer = new GridCoverageRenderer(
                mapExtent.getCoordinateReferenceSystem(), mapExtent, screenSize, w2s);


        RasterSymbolizer rasterSymbolizer = buildRainColorMap();


        RenderedImage image = renderer.renderImage(rainReader, null, rasterSymbolizer, Interpolation.getInstance(Interpolation.INTERP_NEAREST),
                Color.RED, 256, 256);
        assertNotNull(image);
        File reference = new File(
                "src/test/resources/org/geotools/renderer/lite/gridcoverage2d/polar_touchdateline.png");
        ImageAssert.assertEquals(reference, image, 0);

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                        interpolation, readerBgColor);
                final GridCoverageRenderer gcr = new GridCoverageRenderer(mapEnvelope.getCoordinateReferenceSystem(), mapEnvelope,
                        mapRasterArea, worldToScreen, interpolationHints);
                gcr.setAdvancedProjectionHandlingEnabled(true);
                gcr.setWrapEnabled(DefaultWebMapService.isContinuousMapWrappingEnabled());
                image = gcr.renderImage(reader, readParameters, symbolizer, interpolation,
                        mapContent.getBgColor(), tileSizeX, tileSizeY);
                if (image == null) {
                    // we're outside of the coverage definition area, return an empty space
                    image = createBkgImage(mapWidth, mapHeight, bgColor, null);
                }

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                final GridCoverageRenderer gcr = new GridCoverageRenderer(mapCRS,
                        ReferencedEnvelope.reference(readGG.getEnvelope()),
                        readGG.getGridRange2D(), worldToScreen, interpolationHints);


                // create a solid color empty image
                image = gcr.renderImage(coverage, symbolizer, interpolation,
                        mapContent.getBgColor(), tileSizeX, tileSizeY);
            }
        } catch (Throwable e) {
            throw new ServiceException(e);
        }

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                                new RenderingHints(JAI.KEY_INTERPOLATION,interpolation));     
                    }


                    
                    // create a solid color empty image
                    image = gcr.renderImage(coverage, symbolizer, interpolation,
                            mapContext.getBgColor(), tileSizeX, tileSizeY);
                }
            } finally {
                // once the final image is rendered we need to clean up the planar image chain
                // that the coverage references to

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