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++; } }