public Raster getRaster()

in pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/shading/RadialShadingContext.java [171:302]

• 120 lines of code
• 26 McCabe index (conditional complexity)

    public Raster getRaster(int x, int y, int w, int h)
    {
        // create writable raster
        WritableRaster raster = getColorModel().createCompatibleWritableRaster(w, h);
        float inputValue = -1;
        boolean useBackground;
        int[] data = new int[w * h * 4];
        float[] values = new float[2];
        for (int j = 0; j < h; j++)
        {
            for (int i = 0; i < w; i++)
            {
                values[0] = x + i;
                values[1] = y + j;
                rat.transform(values, 0, values, 0, 1);
                useBackground = false;
                float[] inputValues = calculateInputValues(values[0], values[1]);
                if (Float.isNaN(inputValues[0]) && Float.isNaN(inputValues[1]))
                {
                    if (getBackground() == null)
                    {
                        continue;
                    }
                    useBackground = true;
                }
                else
                {
                    // choose 1 of the 2 values
                    if (inputValues[0] >= 0 && inputValues[0] <= 1)
                    {
                        // both values are in the range -> choose the larger one
                        if (inputValues[1] >= 0 && inputValues[1] <= 1)
                        {
                            inputValue = Math.max(inputValues[0], inputValues[1]);
                        }
                        // first value is in the range, the second not -> choose first value
                        else
                        {
                            inputValue = inputValues[0];
                        }
                    }
                    else
                    {
                        // first value is not in the range, 
                        // but the second -> choose second value
                        if (inputValues[1] >= 0 && inputValues[1] <= 1)
                        {
                            inputValue = inputValues[1];
                        }
                        // both are not in the range
                        else
                        {
                            if (extend[0] && extend[1])
                            {
                                inputValue = Math.max(inputValues[0], inputValues[1]);
                            }
                            else if (extend[0])
                            {
                                inputValue = inputValues[0];
                            }
                            else if (extend[1])
                            {
                                inputValue = inputValues[1];
                            }
                            else if (getBackground() != null)
                            {
                                useBackground = true;
                            }
                            else
                            {
                                continue;
                            }
                        }
                    }
                    // input value is out of range
                    if (inputValue > 1)
                    {
                        // extend shading if extend[1] is true and nonzero radius
                        if (extend[1] && coords[5] > 0)
                        {
                            inputValue = 1;
                        }
                        else
                        {
                            if (getBackground() == null)
                            {
                                continue;
                            }
                            useBackground = true;
                        }
                    }
                    // input value is out of range
                    else if (inputValue < 0)
                    {
                        // extend shading if extend[0] is true and nonzero radius
                        if (extend[0] && coords[2] > 0)
                        {
                            inputValue = 0;
                        }
                        else
                        {
                            if (getBackground() == null)
                            {
                                continue;
                            }
                            useBackground = true;
                        }
                    }
                }
                int value;
                if (useBackground)
                {
                    // use the given background color values
                    value = getRgbBackground();
                }
                else
                {
                    int key = (int) (inputValue * factor);
                    value = colorTable[key];
                }
                int index = (j * w + i) * 4;
                data[index] = value & 255;
                value >>= 8;
                data[index + 1] = value & 255;
                value >>= 8;
                data[index + 2] = value & 255;
                data[index + 3] = 255;
            }
        }
        raster.setPixels(0, 0, w, h, data);
        return raster;
    }