| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.carbon.*; |
| import org.eclipse.swt.internal.cocoa.*; |
| |
| /** |
| * Instances of this class represent paths through the two-dimensional |
| * coordinate system. Paths do not have to be continuous, and can be |
| * described using lines, rectangles, arcs, cubic or quadratic bezier curves, |
| * glyphs, or other paths. |
| * <p> |
| * Application code must explicitly invoke the <code>Path.dispose()</code> |
| * method to release the operating system resources managed by each instance |
| * when those instances are no longer required. |
| * </p> |
| * <p> |
| * This class requires the operating system's advanced graphics subsystem |
| * which may not be available on some platforms. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#path">Path, Pattern snippets</a> |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: GraphicsExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * |
| * @since 3.1 |
| */ |
| public class Path extends Resource { |
| |
| /** |
| * the OS resource for the Path |
| * (Warning: This field is platform dependent) |
| * <p> |
| * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT |
| * public API. It is marked public only so that it can be shared |
| * within the packages provided by SWT. It is not available on all |
| * platforms and should never be accessed from application code. |
| * </p> |
| * |
| * @noreference This field is not intended to be referenced by clients. |
| */ |
| public int handle; |
| |
| boolean moved, closed = true; |
| |
| /** |
| * Constructs a new empty Path. |
| * <p> |
| * This operation requires the operating system's advanced |
| * graphics subsystem which may not be available on some |
| * platforms. |
| * </p> |
| * |
| * @param device the device on which to allocate the path |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> |
| * </ul> |
| * |
| * @see #dispose() |
| */ |
| public Path (Device device) { |
| super(device); |
| handle = OS.CGPathCreateMutable(); |
| if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| init(); |
| } |
| |
| /** |
| * Constructs a new Path that is a copy of <code>path</code>. If |
| * <code>flatness</code> is less than or equal to zero, an unflatten |
| * copy of the path is created. Otherwise, it specifies the maximum |
| * error between the path and its flatten copy. Smaller numbers give |
| * better approximation. |
| * <p> |
| * This operation requires the operating system's advanced |
| * graphics subsystem which may not be available on some |
| * platforms. |
| * </p> |
| * |
| * @param device the device on which to allocate the path |
| * @param path the path to make a copy |
| * @param flatness the flatness value |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li> |
| * <li>ERROR_NULL_ARGUMENT - if the path is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the path has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> |
| * </ul> |
| * |
| * @see #dispose() |
| * @since 3.4 |
| */ |
| public Path (Device device, Path path, float flatness) { |
| super(device); |
| if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| flatness = Math.max(0, flatness); |
| if (flatness == 0) { |
| handle = OS.CGPathCreateMutableCopy(path.handle); |
| if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| } else { |
| handle = OS.CGPathCreateMutable(); |
| if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| PathData data = path.getPathData(); |
| int bezierPath = Cocoa.objc_msgSend(Cocoa.C_NSBezierPath, Cocoa.S_bezierPath); |
| byte[] types = data.types; |
| float[] points = data.points; |
| NSPoint point = new NSPoint(), point2 = new NSPoint(), point3 = new NSPoint(); |
| for (int i = 0, j = 0; i < types.length; i++) { |
| switch (types[i]) { |
| case SWT.PATH_MOVE_TO: |
| point.x = points[j++]; |
| point.y = points[j++]; |
| Cocoa.objc_msgSend(bezierPath, Cocoa.S_moveToPoint, point); |
| break; |
| case SWT.PATH_LINE_TO: |
| point.x = points[j++]; |
| point.y = points[j++]; |
| Cocoa.objc_msgSend(bezierPath, Cocoa.S_lineToPoint, point); |
| break; |
| case SWT.PATH_CUBIC_TO: |
| point2.x = points[j++]; |
| point2.y = points[j++]; |
| point3.x = points[j++]; |
| point3.y = points[j++]; |
| point.x = points[j++]; |
| point.y = points[j++]; |
| Cocoa.objc_msgSend(bezierPath, Cocoa.S_curveToPoint, point, point2, point3); |
| break; |
| case SWT.PATH_QUAD_TO: |
| float currentX = point.x; |
| float currentY = point.y; |
| point2.x = points[j++]; |
| point2.y = points[j++]; |
| point.x = points[j++]; |
| point.y = points[j++]; |
| float x0 = currentX; |
| float y0 = currentY; |
| float cx1 = x0 + 2 * (point2.x - x0) / 3; |
| float cy1 = y0 + 2 * (point2.y - y0) / 3; |
| float cx2 = cx1 + (point.x - x0) / 3; |
| float cy2 = cy1 + (point.y - y0) / 3; |
| point2.x = cx1; |
| point2.y = cy1; |
| point3.x = cx2; |
| point3.y = cy2; |
| Cocoa.objc_msgSend(bezierPath, Cocoa.S_curveToPoint, point, point2, point3); |
| break; |
| case SWT.PATH_CLOSE: |
| Cocoa.objc_msgSend(bezierPath, Cocoa.S_closePath); |
| break; |
| default: |
| dispose(); |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| } |
| Cocoa.objc_msgSend(Cocoa.C_NSBezierPath, Cocoa.S_setDefaultFlatness, flatness); |
| bezierPath = Cocoa.objc_msgSend(bezierPath, Cocoa.S_bezierPathByFlatteningPath); |
| int count = Cocoa.objc_msgSend(bezierPath, Cocoa.S_elementCount); |
| int pointsPtr = OS.malloc(NSPoint.sizeof * 3); |
| if (pointsPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| for (int i = 0; i < count; i++) { |
| int element = Cocoa.objc_msgSend(bezierPath, Cocoa.S_elementAtIndex_associatedPoints, i, pointsPtr); |
| switch (element) { |
| case Cocoa.NSMoveToBezierPathElement: |
| Cocoa.memmove(point, pointsPtr, NSPoint.sizeof); |
| moveTo(point.x, point.y); |
| break; |
| case Cocoa.NSLineToBezierPathElement: |
| Cocoa.memmove(point, pointsPtr, NSPoint.sizeof); |
| lineTo(point.x, point.y); |
| break; |
| case Cocoa.NSCurveToBezierPathElement: |
| Cocoa.memmove(point, pointsPtr, NSPoint.sizeof); |
| Cocoa.memmove(point2, pointsPtr + NSPoint.sizeof, NSPoint.sizeof); |
| Cocoa.memmove(point3, pointsPtr + NSPoint.sizeof + NSPoint.sizeof, NSPoint.sizeof); |
| cubicTo(point2.x, point2.y, point3.x, point3.y, point.x, point.y); |
| break; |
| case Cocoa.NSClosePathBezierPathElement: |
| close(); |
| break; |
| } |
| } |
| OS.free(pointsPtr); |
| } |
| init(); |
| } |
| |
| /** |
| * Constructs a new Path with the specifed PathData. |
| * <p> |
| * This operation requires the operating system's advanced |
| * graphics subsystem which may not be available on some |
| * platforms. |
| * </p> |
| * |
| * @param device the device on which to allocate the path |
| * @param data the data for the path |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li> |
| * <li>ERROR_NULL_ARGUMENT - if the data is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li> |
| * </ul> |
| * @exception SWTError <ul> |
| * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li> |
| * </ul> |
| * |
| * @see #dispose() |
| * @since 3.4 |
| */ |
| public Path (Device device, PathData data) { |
| this(device); |
| if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(data); |
| } |
| |
| /** |
| * Adds to the receiver a circular or elliptical arc that lies within |
| * the specified rectangular area. |
| * <p> |
| * The resulting arc begins at <code>startAngle</code> and extends |
| * for <code>arcAngle</code> degrees. |
| * Angles are interpreted such that 0 degrees is at the 3 o'clock |
| * position. A positive value indicates a counter-clockwise rotation |
| * while a negative value indicates a clockwise rotation. |
| * </p><p> |
| * The center of the arc is the center of the rectangle whose origin |
| * is (<code>x</code>, <code>y</code>) and whose size is specified by the |
| * <code>width</code> and <code>height</code> arguments. |
| * </p><p> |
| * The resulting arc covers an area <code>width + 1</code> pixels wide |
| * by <code>height + 1</code> pixels tall. |
| * </p> |
| * |
| * @param x the x coordinate of the upper-left corner of the arc |
| * @param y the y coordinate of the upper-left corner of the arc |
| * @param width the width of the arc |
| * @param height the height of the arc |
| * @param startAngle the beginning angle |
| * @param arcAngle the angular extent of the arc, relative to the start angle |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void addArc(float x, float y, float width, float height, float startAngle, float arcAngle) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| float[] cmt = new float[6]; |
| OS.CGAffineTransformMake(width / 2f, 0, 0, height / 2f, x + width / 2f, y + height / 2f, cmt); |
| float angle = -startAngle * (float)Compatibility.PI / 180; |
| if (closed) OS.CGPathMoveToPoint(handle, cmt, (float)Math.cos(angle), (float)Math.sin(angle)); |
| OS.CGPathAddArc(handle, cmt, 0, 0, 1, angle, -(startAngle + arcAngle) * (float)Compatibility.PI / 180, arcAngle >= 0); |
| moved = true; |
| closed = false; |
| if (Math.abs(arcAngle) >= 360) close(); |
| } |
| |
| /** |
| * Adds to the receiver the path described by the parameter. |
| * |
| * @param path the path to add to the receiver |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void addPath(Path path) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| OS.CGPathAddPath(handle, null, path.handle); |
| moved = false; |
| closed = path.closed; |
| } |
| |
| /** |
| * Adds to the receiver the rectangle specified by x, y, width and height. |
| * |
| * @param x the x coordinate of the rectangle to add |
| * @param y the y coordinate of the rectangle to add |
| * @param width the width of the rectangle to add |
| * @param height the height of the rectangle to add |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void addRectangle(float x, float y, float width, float height) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| CGRect rect = new CGRect(); |
| rect.x = x; |
| rect.y = y; |
| rect.width = width; |
| rect.height = height; |
| OS.CGPathAddRect(handle, null, rect); |
| moved = false; |
| closed = true; |
| } |
| |
| int newPathProc(int data) { |
| first = true; |
| return 0; |
| } |
| |
| int closePathProc(int data) { |
| first = true; |
| return 0; |
| } |
| |
| int lineProc(int pt1, int pt2, int data) { |
| if (first) { |
| first = false; |
| OS.memmove(point, pt1, 8); |
| OS.CGPathMoveToPoint(handle, null, originX + point[0], originY + point[1]); |
| } |
| OS.memmove(point, pt2, 8); |
| OS.CGPathAddLineToPoint(handle, null, originX + point[0], originY + point[1]); |
| return 0; |
| } |
| |
| int curveProc(int pt1, int controlPt, int pt2, int data) { |
| if (first) { |
| first = false; |
| OS.memmove(point, pt1, 8); |
| OS.CGPathMoveToPoint(handle, null, originX + point[0], originY + point[1]); |
| } |
| OS.memmove(point, pt2, 8); |
| float x2 = point[0], y2 = point[1]; |
| OS.memmove(point, controlPt, 8); |
| OS.CGPathAddQuadCurveToPoint(handle, null, originX + point[0], originY + point[1], originX + x2, originY + y2); |
| return 0; |
| } |
| |
| float originX, originY; |
| float[] point = new float[2]; |
| boolean first; |
| /** |
| * Adds to the receiver the pattern of glyphs generated by drawing |
| * the given string using the given font starting at the point (x, y). |
| * |
| * @param string the text to use |
| * @param x the x coordinate of the starting point |
| * @param y the y coordinate of the starting point |
| * @param font the font to use |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the font is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void addString(String string, float x, float y, Font font) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (font == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int length = string.length(); |
| if (length == 0) return; |
| moved = false; |
| closed = true; |
| |
| Callback newPathCallback = new Callback(this, "newPathProc", 1); |
| int newPathProc = newPathCallback.getAddress(); |
| if (newPathProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); |
| Callback lineCallback = new Callback(this, "lineProc", 3); |
| int lineProc = lineCallback.getAddress(); |
| if (lineProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); |
| Callback curveCallback = new Callback(this, "curveProc", 4); |
| int curveProc = curveCallback.getAddress(); |
| if (curveProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); |
| Callback closePathCallback = new Callback(this, "closePathProc", 1); |
| int closePathProc = closePathCallback.getAddress(); |
| if (closePathProc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); |
| |
| int style = font.atsuiStyle; |
| if (style == 0) style = font.createStyle(); |
| if (style == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int[] buffer = new int[1]; |
| OS.ATSUCreateTextLayout(buffer); |
| if (buffer[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int layout = buffer[0]; |
| char[] chars = new char[length]; |
| string.getChars(0, length, chars, 0); |
| int textPtr = OS.NewPtr(length * 2); |
| if (textPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| OS.memmove(textPtr, chars, length * 2); |
| OS.ATSUSetTextPointerLocation(layout, textPtr, 0, length, length); |
| OS.ATSUSetRunStyle(layout, style, 0, length); |
| OS.ATSUSetTransientFontMatching(layout, true); |
| int[] ascent = new int[1], descent = new int[1]; |
| OS.ATSUGetUnjustifiedBounds(layout, 0, length, null, null, ascent, descent); |
| y += OS.Fix2X(ascent[0]); |
| |
| int[] layoutRecords = new int[1], numRecords = new int[1], deltaYs = new int[1], numDeltaYs = new int[1]; |
| OS.ATSUDirectGetLayoutDataArrayPtrFromTextLayout (layout, 0, OS.kATSUDirectDataLayoutRecordATSLayoutRecordCurrent, layoutRecords, numRecords); |
| OS.ATSUDirectGetLayoutDataArrayPtrFromTextLayout (layout, 0, OS.kATSUDirectDataBaselineDeltaFixedArray, deltaYs, numDeltaYs); |
| int[] deltaY = new int[1], status = new int[1]; |
| ATSLayoutRecord record = new ATSLayoutRecord(); |
| for (int i = 0; i < numRecords[0]; i++) { |
| OS.memmove(record, layoutRecords[0] + (i * ATSLayoutRecord.sizeof), ATSLayoutRecord.sizeof); |
| originX = x + (float)OS.Fix2X(record.realPos); |
| if (deltaYs[0] == 0) { |
| originY = y; |
| } else { |
| OS.memmove(deltaY, deltaYs[0] + (i * 4), 4); |
| originY = y - (float)OS.Fix2X(deltaY[0]); |
| } |
| first = true; |
| if (record.glyphID != OS.kATSDeletedGlyphcode) { |
| OS.ATSUGlyphGetQuadraticPaths (style, record.glyphID, newPathProc, lineProc, curveProc, closePathProc, 0, status); |
| } |
| } |
| OS.CGPathCloseSubpath(handle); |
| if (deltaYs[0] != 0) { |
| OS.ATSUDirectReleaseLayoutDataArrayPtr(0, OS.kATSUDirectDataBaselineDeltaFixedArray, deltaYs[0]); |
| } |
| OS.ATSUDirectReleaseLayoutDataArrayPtr(0, OS.kATSUDirectDataLayoutRecordATSLayoutRecordCurrent, layoutRecords[0]); |
| |
| if (style != font.atsuiStyle) OS.ATSUDisposeStyle(style); |
| if (layout != 0) OS.ATSUDisposeTextLayout(layout); |
| if (textPtr != 0) OS.DisposePtr(textPtr); |
| |
| newPathCallback.dispose(); |
| lineCallback.dispose(); |
| curveCallback.dispose(); |
| closePathCallback.dispose(); |
| } |
| |
| CGPathElement element; |
| int count, typeCount; |
| byte[] types; |
| float[] points; |
| int applierFunc(int info, int elementPtr) { |
| OS.memmove(element, elementPtr, CGPathElement.sizeof); |
| int type = 0, length = 1; |
| switch (element.type) { |
| case OS.kCGPathElementMoveToPoint: type = SWT.PATH_MOVE_TO; break; |
| case OS.kCGPathElementAddLineToPoint: type = SWT.PATH_LINE_TO; break; |
| case OS.kCGPathElementAddQuadCurveToPoint: type = SWT.PATH_QUAD_TO; length = 2; break; |
| case OS.kCGPathElementAddCurveToPoint: type = SWT.PATH_CUBIC_TO; length = 3; break; |
| case OS.kCGPathElementCloseSubpath: type = SWT.PATH_CLOSE; length = 0; break; |
| } |
| if (types != null) { |
| types[typeCount] = (byte)type; |
| if (length > 0) { |
| OS.memmove(point, element.points, length * 8); |
| System.arraycopy(point, 0, points, count, length * 2); |
| } |
| } |
| typeCount++; |
| count += length * 2; |
| return 0; |
| } |
| |
| /** |
| * Closes the current sub path by adding to the receiver a line |
| * from the current point of the path back to the starting point |
| * of the sub path. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void close() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| OS.CGPathCloseSubpath(handle); |
| moved = false; |
| closed = true; |
| } |
| |
| /** |
| * Returns <code>true</code> if the specified point is contained by |
| * the receiver and false otherwise. |
| * <p> |
| * If outline is <code>true</code>, the point (x, y) checked for containment in |
| * the receiver's outline. If outline is <code>false</code>, the point is |
| * checked to see if it is contained within the bounds of the (closed) area |
| * covered by the receiver. |
| * |
| * @param x the x coordinate of the point to test for containment |
| * @param y the y coordinate of the point to test for containment |
| * @param gc the GC to use when testing for containment |
| * @param outline controls whether to check the outline or contained area of the path |
| * @return <code>true</code> if the path contains the point and <code>false</code> otherwise |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the gc is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean contains(float x, float y, GC gc, boolean outline) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH); |
| //TODO - see windows |
| int pixel = OS.NewPtr(4); |
| if (pixel == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int[] buffer = new int[]{0xFFFFFFFF}; |
| OS.memmove(pixel, buffer, 4); |
| int context = OS.CGBitmapContextCreate(pixel, 1, 1, 8, 4, device.colorspace, OS.kCGImageAlphaNoneSkipFirst); |
| if (context == 0) { |
| OS.DisposePtr(pixel); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| GCData data = gc.data; |
| int capStyle = 0; |
| switch (data.lineCap) { |
| case SWT.CAP_ROUND: capStyle = OS.kCGLineCapRound; break; |
| case SWT.CAP_FLAT: capStyle = OS.kCGLineCapButt; break; |
| case SWT.CAP_SQUARE: capStyle = OS.kCGLineCapSquare; break; |
| } |
| OS.CGContextSetLineCap(context, capStyle); |
| int joinStyle = 0; |
| switch (data.lineJoin) { |
| case SWT.JOIN_MITER: joinStyle = OS.kCGLineJoinMiter; break; |
| case SWT.JOIN_ROUND: joinStyle = OS.kCGLineJoinRound; break; |
| case SWT.JOIN_BEVEL: joinStyle = OS.kCGLineJoinBevel; break; |
| } |
| OS.CGContextSetLineJoin(context, joinStyle); |
| OS.CGContextSetLineWidth(context, data.lineWidth); |
| OS.CGContextTranslateCTM(context, -x + 0.5f, -y + 0.5f); |
| OS.CGContextAddPath(context, handle); |
| if (outline) { |
| OS.CGContextStrokePath(context); |
| } else { |
| if (data.fillRule == SWT.FILL_WINDING) { |
| OS.CGContextFillPath(context); |
| } else { |
| OS.CGContextEOFillPath(context); |
| } |
| } |
| OS.CGContextRelease(context); |
| OS.memmove(buffer, pixel, 4); |
| OS.DisposePtr(pixel); |
| return buffer[0] != 0xFFFFFFFF; |
| } |
| |
| /** |
| * Adds to the receiver a cubic bezier curve based on the parameters. |
| * |
| * @param cx1 the x coordinate of the first control point of the spline |
| * @param cy1 the y coordinate of the first control of the spline |
| * @param cx2 the x coordinate of the second control of the spline |
| * @param cy2 the y coordinate of the second control of the spline |
| * @param x the x coordinate of the end point of the spline |
| * @param y the y coordinate of the end point of the spline |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (!moved) { |
| CGPoint pt = new CGPoint(); |
| if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); |
| OS.CGPathMoveToPoint(handle, null, pt.x, pt.y); |
| moved = true; |
| } |
| closed = false; |
| OS.CGPathAddCurveToPoint(handle, null, cx1, cy1, cx2, cy2, x, y); |
| } |
| |
| void destroy() { |
| OS.CGPathRelease(handle); |
| handle = 0; |
| } |
| |
| /** |
| * Replaces the first four elements in the parameter with values that |
| * describe the smallest rectangle that will completely contain the |
| * receiver (i.e. the bounding box). |
| * |
| * @param bounds the array to hold the result |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the bounding box</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void getBounds(float[] bounds) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (bounds.length < 4) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| CGRect rect = new CGRect(); |
| OS.CGPathGetBoundingBox(handle, rect); |
| bounds[0] = rect.x; |
| bounds[1] = rect.y; |
| bounds[2] = rect.width; |
| bounds[3] = rect.height; |
| } |
| |
| /** |
| * Replaces the first two elements in the parameter with values that |
| * describe the current point of the path. |
| * |
| * @param point the array to hold the result |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the end point</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void getCurrentPoint(float[] point) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (point == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (point.length < 2) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| CGPoint pt = new CGPoint(); |
| if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); |
| point[0] = pt.x; |
| point[1] = pt.y; |
| } |
| |
| /** |
| * Returns a device independent representation of the receiver. |
| * |
| * @return the PathData for the receiver |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see PathData |
| */ |
| public PathData getPathData() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| Callback callback = new Callback(this, "applierFunc", 2); |
| int proc = callback.getAddress(); |
| if (proc == 0) SWT.error(SWT.ERROR_NO_MORE_CALLBACKS); |
| count = typeCount = 0; |
| element = new CGPathElement(); |
| OS.CGPathApply(handle, 0, proc); |
| types = new byte[typeCount]; |
| points = new float[count]; |
| point = new float[6]; |
| count = typeCount = 0; |
| OS.CGPathApply(handle, 0, proc); |
| callback.dispose(); |
| PathData result = new PathData(); |
| result.types = types; |
| result.points = points; |
| element = null; |
| types = null; |
| points = null; |
| point = null; |
| return result; |
| } |
| |
| void init(PathData data) { |
| byte[] types = data.types; |
| float[] points = data.points; |
| for (int i = 0, j = 0; i < types.length; i++) { |
| switch (types[i]) { |
| case SWT.PATH_MOVE_TO: |
| moveTo(points[j++], points[j++]); |
| break; |
| case SWT.PATH_LINE_TO: |
| lineTo(points[j++], points[j++]); |
| break; |
| case SWT.PATH_CUBIC_TO: |
| cubicTo(points[j++], points[j++], points[j++], points[j++], points[j++], points[j++]); |
| break; |
| case SWT.PATH_QUAD_TO: |
| quadTo(points[j++], points[j++], points[j++], points[j++]); |
| break; |
| case SWT.PATH_CLOSE: |
| close(); |
| break; |
| default: |
| dispose(); |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| } |
| } |
| |
| /** |
| * Returns <code>true</code> if the Path has been disposed, |
| * and <code>false</code> otherwise. |
| * <p> |
| * This method gets the dispose state for the Path. |
| * When a Path has been disposed, it is an error to |
| * invoke any other method (except {@link #dispose()}) using the Path. |
| * |
| * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise |
| */ |
| public boolean isDisposed() { |
| return handle == 0; |
| } |
| |
| /** |
| * Adds to the receiver a line from the current point to |
| * the point specified by (x, y). |
| * |
| * @param x the x coordinate of the end of the line to add |
| * @param y the y coordinate of the end of the line to add |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void lineTo(float x, float y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (!moved) { |
| CGPoint pt = new CGPoint(); |
| if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); |
| OS.CGPathMoveToPoint(handle, null, pt.x, pt.y); |
| moved = true; |
| } |
| closed = false; |
| OS.CGPathAddLineToPoint(handle, null, x, y); |
| } |
| |
| /** |
| * Sets the current point of the receiver to the point |
| * specified by (x, y). Note that this starts a new |
| * sub path. |
| * |
| * @param x the x coordinate of the new end point |
| * @param y the y coordinate of the new end point |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void moveTo(float x, float y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| OS.CGPathMoveToPoint(handle, null, x, y); |
| /* |
| * Bug in Quartz. If CGPathMoveToPoint() is not called at the |
| * begining of a subpath, the following segments do not output |
| * anything. The fix is to detect that the app did not call |
| * CGPathMoveToPoint() and call it explicitly. |
| */ |
| closed = true; |
| moved = true; |
| } |
| |
| /** |
| * Adds to the receiver a quadratic curve based on the parameters. |
| * |
| * @param cx the x coordinate of the control point of the spline |
| * @param cy the y coordinate of the control point of the spline |
| * @param x the x coordinate of the end point of the spline |
| * @param y the y coordinate of the end point of the spline |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void quadTo(float cx, float cy, float x, float y) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (!moved) { |
| CGPoint pt = new CGPoint(); |
| if (!OS.CGPathIsEmpty(handle)) OS.CGPathGetCurrentPoint(handle, pt); |
| OS.CGPathMoveToPoint(handle, null, pt.x, pt.y); |
| moved = true; |
| } |
| closed = false; |
| OS.CGPathAddQuadCurveToPoint(handle, null, cx, cy, x, y); |
| } |
| |
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the receiver |
| */ |
| public String toString () { |
| if (isDisposed()) return "Path {*DISPOSED*}"; |
| return "Path {" + handle + "}"; |
| } |
| |
| } |