| /* |
| * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package javax.swing.plaf.nimbus; |
| |
| import java.awt.Graphics; |
| import java.awt.Image; |
| import java.awt.Insets; |
| |
| /** |
| * ImageScalingHelper |
| * |
| * @author Created by Jasper Potts (Aug 8, 2007) |
| */ |
| class ImageScalingHelper { |
| |
| /** Enumeration for the types of painting this class can handle. */ |
| enum PaintType { |
| /** |
| * Painting type indicating the image should be centered in the space provided. When used the <code>mask</code> |
| * is ignored. |
| */ |
| CENTER, |
| |
| /** |
| * Painting type indicating the image should be tiled across the specified width and height. When used the |
| * <code>mask</code> is ignored. |
| */ |
| TILE, |
| |
| /** |
| * Painting type indicating the image should be split into nine regions with the top, left, bottom and right |
| * areas stretched. |
| */ |
| PAINT9_STRETCH, |
| |
| /** |
| * Painting type indicating the image should be split into nine regions with the top, left, bottom and right |
| * areas tiled. |
| */ |
| PAINT9_TILE |
| } |
| |
| ; |
| |
| private static final Insets EMPTY_INSETS = new Insets(0, 0, 0, 0); |
| |
| static final int PAINT_TOP_LEFT = 1; |
| static final int PAINT_TOP = 2; |
| static final int PAINT_TOP_RIGHT = 4; |
| static final int PAINT_LEFT = 8; |
| static final int PAINT_CENTER = 16; |
| static final int PAINT_RIGHT = 32; |
| static final int PAINT_BOTTOM_RIGHT = 64; |
| static final int PAINT_BOTTOM = 128; |
| static final int PAINT_BOTTOM_LEFT = 256; |
| /** |
| * Specifies that all regions should be painted. If this is set any other regions specified will not be painted. |
| * For example PAINT_ALL | PAINT_CENTER will paint all but the center. |
| */ |
| static final int PAINT_ALL = 512; |
| |
| /** |
| * Paints using the algorightm specified by <code>paintType</code>. |
| * |
| * @param g Graphics to render to |
| * @param x X-coordinate |
| * @param y Y-coordinate |
| * @param w Width to render to |
| * @param h Height to render to |
| * @param image Image to render from, if <code>null</code> this method will do nothing |
| * @param sInsets Insets specifying the portion of the image that will be stretched or tiled, if <code>null</code> |
| * empty <code>Insets</code> will be used. |
| * @param dInsets Destination insets specifying the portion of the image will be stretched or tiled, if |
| * <code>null</code> empty <code>Insets</code> will be used. |
| * @param paintType Specifies what type of algorithm to use in painting |
| * @param mask Specifies portion of image to render, if <code>PAINT_ALL</code> is specified, any other regions |
| * specified will not be painted, for example PAINT_ALL | PAINT_CENTER paints everything but the |
| * center. |
| */ |
| public static void paint(Graphics g, int x, int y, int w, int h, |
| Image image, Insets sInsets, |
| Insets dInsets, PaintType paintType, int mask) { |
| if (image == null || image.getWidth(null) <= 0 || image.getHeight(null) <= 0) { |
| return; |
| } |
| if (sInsets == null) { |
| sInsets = EMPTY_INSETS; |
| } |
| if (dInsets == null) { |
| dInsets = EMPTY_INSETS; |
| } |
| int iw = image.getWidth(null); |
| int ih = image.getHeight(null); |
| |
| if (paintType == PaintType.CENTER) { |
| // Center the image |
| g.drawImage(image, x + (w - iw) / 2, |
| y + (h - ih) / 2, null); |
| } else if (paintType == PaintType.TILE) { |
| // Tile the image |
| int lastIY = 0; |
| for (int yCounter = y, maxY = y + h; yCounter < maxY; |
| yCounter += (ih - lastIY), lastIY = 0) { |
| int lastIX = 0; |
| for (int xCounter = x, maxX = x + w; xCounter < maxX; |
| xCounter += (iw - lastIX), lastIX = 0) { |
| int dx2 = Math.min(maxX, xCounter + iw - lastIX); |
| int dy2 = Math.min(maxY, yCounter + ih - lastIY); |
| g.drawImage(image, xCounter, yCounter, dx2, dy2, |
| lastIX, lastIY, lastIX + dx2 - xCounter, |
| lastIY + dy2 - yCounter, null); |
| } |
| } |
| } else { |
| int st = sInsets.top; |
| int sl = sInsets.left; |
| int sb = sInsets.bottom; |
| int sr = sInsets.right; |
| |
| int dt = dInsets.top; |
| int dl = dInsets.left; |
| int db = dInsets.bottom; |
| int dr = dInsets.right; |
| |
| // Constrain the insets to the size of the image |
| if (st + sb > ih) { |
| db = dt = sb = st = Math.max(0, ih / 2); |
| } |
| if (sl + sr > iw) { |
| dl = dr = sl = sr = Math.max(0, iw / 2); |
| } |
| |
| // Constrain the insets to the size of the region we're painting |
| // in. |
| if (dt + db > h) { |
| dt = db = Math.max(0, h / 2 - 1); |
| } |
| if (dl + dr > w) { |
| dl = dr = Math.max(0, w / 2 - 1); |
| } |
| |
| boolean stretch = (paintType == PaintType.PAINT9_STRETCH); |
| if ((mask & PAINT_ALL) != 0) { |
| mask = (PAINT_ALL - 1) & ~mask; |
| } |
| |
| if ((mask & PAINT_LEFT) != 0) { |
| drawChunk(image, g, stretch, x, y + dt, x + dl, y + h - db, |
| 0, st, sl, ih - sb, false); |
| } |
| if ((mask & PAINT_TOP_LEFT) != 0) { |
| drawImage(image, g, x, y, x + dl, y + dt, |
| 0, 0, sl, st); |
| } |
| if ((mask & PAINT_TOP) != 0) { |
| drawChunk(image, g, stretch, x + dl, y, x + w - dr, y + dt, |
| sl, 0, iw - sr, st, true); |
| } |
| if ((mask & PAINT_TOP_RIGHT) != 0) { |
| drawImage(image, g, x + w - dr, y, x + w, y + dt, |
| iw - sr, 0, iw, st); |
| } |
| if ((mask & PAINT_RIGHT) != 0) { |
| drawChunk(image, g, stretch, |
| x + w - dr, y + dt, x + w, y + h - db, |
| iw - sr, st, iw, ih - sb, false); |
| } |
| if ((mask & PAINT_BOTTOM_RIGHT) != 0) { |
| drawImage(image, g, x + w - dr, y + h - db, x + w, y + h, |
| iw - sr, ih - sb, iw, ih); |
| } |
| if ((mask & PAINT_BOTTOM) != 0) { |
| drawChunk(image, g, stretch, |
| x + dl, y + h - db, x + w - dr, y + h, |
| sl, ih - sb, iw - sr, ih, true); |
| } |
| if ((mask & PAINT_BOTTOM_LEFT) != 0) { |
| drawImage(image, g, x, y + h - db, x + dl, y + h, |
| 0, ih - sb, sl, ih); |
| } |
| if ((mask & PAINT_CENTER) != 0) { |
| drawImage(image, g, x + dl, y + dt, x + w - dr, y + h - db, |
| sl, st, iw - sr, ih - sb); |
| } |
| } |
| } |
| |
| /** |
| * Draws a portion of an image, stretched or tiled. |
| * |
| * @param image Image to render. |
| * @param g Graphics to render to |
| * @param stretch Whether the image should be stretched or timed in the |
| * provided space. |
| * @param dx1 X origin to draw to |
| * @param dy1 Y origin to draw to |
| * @param dx2 End x location to draw to |
| * @param dy2 End y location to draw to |
| * @param sx1 X origin to draw from |
| * @param sy1 Y origin to draw from |
| * @param sx2 Max x location to draw from |
| * @param sy2 Max y location to draw from |
| * @param xDirection Used if the image is not stretched. If true it |
| * indicates the image should be tiled along the x axis. |
| */ |
| private static void drawChunk(Image image, Graphics g, boolean stretch, |
| int dx1, int dy1, int dx2, int dy2, int sx1, |
| int sy1, int sx2, int sy2, |
| boolean xDirection) { |
| if (dx2 - dx1 <= 0 || dy2 - dy1 <= 0 || sx2 - sx1 <= 0 || |
| sy2 - sy1 <= 0) { |
| // Bogus location, nothing to paint |
| return; |
| } |
| if (stretch) { |
| g.drawImage(image, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null); |
| } |
| else { |
| int xSize = sx2 - sx1; |
| int ySize = sy2 - sy1; |
| int deltaX; |
| int deltaY; |
| |
| if (xDirection) { |
| deltaX = xSize; |
| deltaY = 0; |
| } |
| else { |
| deltaX = 0; |
| deltaY = ySize; |
| } |
| while (dx1 < dx2 && dy1 < dy2) { |
| int newDX2 = Math.min(dx2, dx1 + xSize); |
| int newDY2 = Math.min(dy2, dy1 + ySize); |
| |
| g.drawImage(image, dx1, dy1, newDX2, newDY2, |
| sx1, sy1, sx1 + newDX2 - dx1, |
| sy1 + newDY2 - dy1, null); |
| dx1 += deltaX; |
| dy1 += deltaY; |
| } |
| } |
| } |
| |
| private static void drawImage(Image image, Graphics g, |
| int dx1, int dy1, int dx2, int dy2, int sx1, |
| int sy1, int sx2, int sy2) { |
| // PENDING: is this necessary, will G2D do it for me? |
| if (dx2 - dx1 <= 0 || dy2 - dy1 <= 0 || sx2 - sx1 <= 0 || |
| sy2 - sy1 <= 0) { |
| // Bogus location, nothing to paint |
| return; |
| } |
| g.drawImage(image, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null); |
| } |
| |
| |
| } |
