--- /dev/null 2018-05-11 11:35:12.000000000 -0700 +++ new/src/demo/share/jfc/J2Ddemo/java2d/demos/Colors/ColorConvert.java 2018-05-11 11:35:11.000000000 -0700 @@ -0,0 +1,129 @@ +/* + * + * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of Oracle nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +package java2d.demos.Colors; + + +import static java.awt.Color.black; +import static java.awt.Color.blue; +import static java.awt.Color.cyan; +import static java.awt.Color.green; +import static java.awt.Color.magenta; +import static java.awt.Color.orange; +import static java.awt.Color.pink; +import static java.awt.Color.red; +import static java.awt.Color.white; +import static java.awt.Color.yellow; +import java.awt.Color; +import java.awt.Font; +import java.awt.Graphics2D; +import java.awt.Image; +import java.awt.RenderingHints; +import java.awt.Shape; +import java.awt.color.ColorSpace; +import java.awt.font.FontRenderContext; +import java.awt.font.TextLayout; +import java.awt.geom.Rectangle2D; +import java.awt.image.BufferedImage; +import java.awt.image.ColorConvertOp; +import java2d.Surface; + + +/** + * ColorConvertOp a ColorSpace.TYPE_RGB BufferedImage to a ColorSpace.CS_GRAY + * BufferedImage. + */ +@SuppressWarnings("serial") +public class ColorConvert extends Surface { + + private static Image img; + private static Color colors[] = { red, pink, orange, + yellow, green, magenta, cyan, blue }; + + public ColorConvert() { + setBackground(white); + img = getImage("clouds.jpg"); + } + + @Override + public void render(int w, int h, Graphics2D g2) { + + int iw = img.getWidth(this); + int ih = img.getHeight(this); + FontRenderContext frc = g2.getFontRenderContext(); + Font font = g2.getFont(); + g2.setColor(black); + TextLayout tl = new TextLayout("ColorConvertOp RGB->GRAY", font, frc); + tl.draw(g2, (float) (w / 2 - tl.getBounds().getWidth() / 2), + tl.getAscent() + tl.getLeading()); + + BufferedImage srcImg = + new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB); + Graphics2D srcG = srcImg.createGraphics(); + RenderingHints rhs = g2.getRenderingHints(); + srcG.setRenderingHints(rhs); + srcG.drawImage(img, 0, 0, null); + + String s = "OpenJDK"; + Font f = new Font(Font.SERIF, Font.BOLD, iw / 6); + tl = new TextLayout(s, f, frc); + Rectangle2D tlb = tl.getBounds(); + char[] chars = s.toCharArray(); + float charWidth = 0.0f; + int rw = iw / chars.length; + int rh = ih / chars.length; + for (int i = 0; i < chars.length; i++) { + tl = new TextLayout(String.valueOf(chars[i]), f, frc); + Shape shape = tl.getOutline(null); + srcG.setColor(colors[i % colors.length]); + tl.draw(srcG, (float) (iw / 2 - tlb.getWidth() / 2 + charWidth), + (float) (ih / 2 + tlb.getHeight() / 2)); + charWidth += (float) shape.getBounds().getWidth(); + srcG.fillRect(i * rw, ih - rh, rw, rh); + srcG.setColor(colors[colors.length - 1 - i % colors.length]); + srcG.fillRect(i * rw, 0, rw, rh); + } + + ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY); + ColorConvertOp theOp = new ColorConvertOp(cs, rhs); + + BufferedImage dstImg = + new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB); + theOp.filter(srcImg, dstImg); + + g2.drawImage(srcImg, 10, 20, w / 2 - 20, h - 30, null); + g2.drawImage(dstImg, w / 2 + 10, 20, w / 2 - 20, h - 30, null); + } + + public static void main(String s[]) { + createDemoFrame(new ColorConvert()); + } +}