private void singleGradient(int[] pixels, int w, int h, float rowrel, float dx, float dy) {
int off = 0;
for (int y = 0; y < h; y++) {
float colrel = rowrel;
int j = w;
int rgb;
if (colrel <= 0.0) {
rgb = colormap.getColor(0);
do {
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
colrel += dx;
} while (--j > 0 && colrel <= 0.0);
}
while (colrel < 1.0 && --j >= 0) {
if (type == BILINEAR) rgb = colormap.getColor(map(ImageMath.triangle(colrel)));
else rgb = colormap.getColor(map(colrel));
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
colrel += dx;
}
if (j > 0) {
if (type == BILINEAR) rgb = colormap.getColor(0.0f);
else rgb = colormap.getColor(1.0f);
do {
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
} while (--j > 0);
}
rowrel += dy;
}
}
public BufferedImage filter(BufferedImage src, BufferedImage dst) {
if (dst == null) dst = createCompatibleDestImage(src, null);
int width = src.getWidth();
int height = src.getHeight();
int numScratches = (int) (density * width * height / 100);
ArrayList<Line2D> lines = new ArrayList<Line2D>();
{
float l = length * width;
Random random = new Random(seed);
Graphics2D g = dst.createGraphics();
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setColor(new Color(color));
g.setStroke(new BasicStroke(this.width));
for (int i = 0; i < numScratches; i++) {
float x = width * random.nextFloat();
float y = height * random.nextFloat();
float a = angle + ImageMath.TWO_PI * (angleVariation * (random.nextFloat() - 0.5f));
float s = (float) Math.sin(a) * l;
float c = (float) Math.cos(a) * l;
float x1 = x - c;
float y1 = y - s;
float x2 = x + c;
float y2 = y + s;
g.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
lines.add(new Line2D.Float(x1, y1, x2, y2));
}
g.dispose();
}
if (false) {
// int[] inPixels = getRGB( src, 0, 0, width, height, null );
int[] inPixels = new int[width * height];
int index = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
float sx = x, sy = y;
for (int i = 0; i < numScratches; i++) {
Line2D.Float l = (Line2D.Float) lines.get(i);
float dot = (l.x2 - l.x1) * (sx - l.x1) + (l.y2 - l.y1) * (sy - l.y1);
if (dot > 0) inPixels[index] |= (1 << i);
}
index++;
}
}
Colormap colormap = new LinearColormap();
index = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
float f = (float) (inPixels[index] & 0x7fffffff) / 0x7fffffff;
inPixels[index] = colormap.getColor(f);
index++;
}
}
setRGB(dst, 0, 0, width, height, inPixels);
}
return dst;
}
private void repeatGradient(int[] pixels, int w, int h, float rowrel, float dx, float dy) {
int off = 0;
for (int y = 0; y < h; y++) {
float colrel = rowrel;
int j = w;
int rgb;
while (--j >= 0) {
if (type == BILINEAR) rgb = colormap.getColor(map(ImageMath.triangle(colrel)));
else rgb = colormap.getColor(map(ImageMath.mod(colrel, 1.0f)));
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
colrel += dx;
}
rowrel += dy;
}
}
private void conicalGradient(int[] pixels, int y, int w, int h) {
int off = 0;
float angle0 = (float) Math.atan2(p2.x - p1.x, p2.y - p1.y);
for (int x = 0; x < w; x++) {
float angle = (float) (Math.atan2(x - p1.x, y - p1.y) - angle0) / (ImageMath.TWO_PI);
angle += 1.0f;
angle %= 1.0f;
if (type == BICONICAL) angle = ImageMath.triangle(angle);
int rgb = colormap.getColor(map(angle));
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
}
}
private void squareGradient(int[] pixels, int y, int w, int h) {
int off = 0;
float radius = Math.max(Math.abs(p2.x - p1.x), Math.abs(p2.y - p1.y));
for (int x = 0; x < w; x++) {
float distance = Math.max(Math.abs(x - p1.x), Math.abs(y - p1.y));
float ratio = distance / radius;
if (repeat) ratio = ratio % 2;
else if (ratio > 1.0) ratio = 1.0f;
int rgb = colormap.getColor(map(ratio));
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
}
}