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Diffstat (limited to 'awt/java/awt/GradientPaintContext.java')
| -rw-r--r-- | awt/java/awt/GradientPaintContext.java | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/awt/java/awt/GradientPaintContext.java b/awt/java/awt/GradientPaintContext.java deleted file mode 100644 index 74575f5..0000000 --- a/awt/java/awt/GradientPaintContext.java +++ /dev/null @@ -1,204 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -/** - * @author Denis M. Kishenko - * @version $Revision$ - */ -package java.awt; - -import java.awt.geom.AffineTransform; -import java.awt.geom.Point2D; -import java.awt.image.ColorModel; -import java.awt.image.DataBufferInt; -import java.awt.image.Raster; -import java.awt.image.WritableRaster; - -class GradientPaintContext implements PaintContext { - - /** - * The size of noncyclic part of color lookup table - */ - static int LOOKUP_SIZE = 256; - - /** - * The index mask to lookup color in the table - */ - static int LOOKUP_MASK = 0x1FF; - - /** - * The min value equivalent to zero. If absolute value less then ZERO it considered as zero. - */ - static double ZERO = 1E-10; - - /** - * The ColorModel user defined for PaintContext - */ - ColorModel cm; - - /** - * The indicator of cycle filling. - */ - boolean cyclic; - - /** - * The integer color value of the start point - */ - int c1; - - /** - * The integer color value of the end point - */ - int c2; - - /** - * The lookup gradient color table - */ - int[] table; - - /** - * The tempopary pre-calculated value to evalutae color index - */ - int dx; - - /** - * The tempopary pre-calculated value to evalutae color index - */ - int dy; - - /** - * The tempopary pre-calculated value to evalutae color index - */ - int delta; - - /** - * Constructs a new GradientPaintcontext - * @param cm - not used - * @param t - the fill transformation - * @param point1 - the start fill point - * @param color1 - color of the start point - * @param point2 - the end fill point - * @param color2 - color of the end point - * @param cyclic - the indicator of cycle filling - */ - GradientPaintContext(ColorModel cm, AffineTransform t, Point2D point1, Color color1, Point2D point2, Color color2, boolean cyclic) { - this.cyclic = cyclic; - this.cm = ColorModel.getRGBdefault(); - - c1 = color1.getRGB(); - c2 = color2.getRGB(); - - double px = point2.getX() - point1.getX(); - double py = point2.getY() - point1.getY(); - - Point2D p = t.transform(point1, null); - Point2D bx = new Point2D.Double(px, py); - Point2D by = new Point2D.Double(py, -px); - - t.deltaTransform(bx, bx); - t.deltaTransform(by, by); - - double vec = bx.getX() * by.getY() - bx.getY() * by.getX(); - - if (Math.abs(vec) < ZERO) { - dx = dy = delta = 0; - table = new int[1]; - table[0] = c1; - } else { - double mult = LOOKUP_SIZE * 256 / vec; - dx = (int)(by.getX() * mult); - dy = (int)(by.getY() * mult); - delta = (int)((p.getX() * by.getY() - p.getY() * by.getX()) * mult); - createTable(); - } - } - - /** - * Create color index lookup table. Calculate 256 step trasformation from - * the start point color to the end point color. Colors multiplied by 256 to do integer calculations. - */ - void createTable() { - double ca = (c1 >> 24) & 0xFF; - double cr = (c1 >> 16) & 0xFF; - double cg = (c1 >> 8) & 0xFF; - double cb = c1 & 0xFF; - - double k = 1.0 / LOOKUP_SIZE; - double da = (((c2 >> 24) & 0xFF) - ca) * k; - double dr = (((c2 >> 16) & 0xFF) - cr) * k; - double dg = (((c2 >> 8) & 0xFF) - cg) * k; - double db = ((c2 & 0xFF) - cb) * k; - - table = new int[cyclic ? LOOKUP_SIZE + LOOKUP_SIZE : LOOKUP_SIZE]; - for(int i = 0; i < LOOKUP_SIZE; i++) { - table[i] = - (int)ca << 24 | - (int)cr << 16 | - (int)cg << 8 | - (int)cb; - ca += da; - cr += dr; - cg += dg; - cb += db; - } - if (cyclic) { - for(int i = 0; i < LOOKUP_SIZE; i++) { - table[LOOKUP_SIZE + LOOKUP_SIZE - 1 - i] = table[i]; - } - } - } - - public ColorModel getColorModel() { - return cm; - } - - public void dispose() { - } - - public Raster getRaster(int x, int y, int w, int h) { - WritableRaster rast = cm.createCompatibleWritableRaster(w, h); - - int[] buf = ((DataBufferInt)rast.getDataBuffer()).getData(); - - int c = x * dy - y * dx - delta; - int cx = dy; - int cy = - w * dy - dx; - int k = 0; - - if (cyclic) { - for(int j = 0; j < h; j++) { - for(int i = 0; i < w; i++) { - buf[k++] = table[(c >> 8) & LOOKUP_MASK]; - c += cx; - } - c += cy; - } - } else { - for(int j = 0; j < h; j++) { - for(int i = 0; i < w; i++) { - int index = c >> 8; - buf[k++] = index < 0 ? c1 : index >= LOOKUP_SIZE ? c2 : table[index]; - c += cx; - } - c += cy; - } - } - - return rast; - } - -} - |