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/*******************************************************************************
* Copyright (c) 2000, 2005 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.*;
/**
* WARNING API STILL UNDER CONSTRUCTION AND SUBJECT TO CHANGE
*/
public class Path {
/**
* the handle to the OS path resource
* (Warning: This field is platform dependent)
*/
public int handle;
/**
* the device where this font was created
*/
Device device;
public Path (Device device) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
this.device = device;
handle = OS.CGPathCreateMutable();
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
if (device.tracking) device.new_Object(this);
}
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);
OS.CGPathAddArc(handle, cmt, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180, true);
}
public void addPath(Path path) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
OS.CGPathAddPath(handle, null, path.handle);
}
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);
}
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.memcpy(point, pt1, 8);
OS.CGPathMoveToPoint(handle, null, originX + point[0], originY + point[1]);
}
OS.memcpy(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.memcpy(point, pt1, 8);
OS.CGPathMoveToPoint(handle, null, originX + point[0], originY + point[1]);
}
OS.memcpy(point, pt2, 8);
float x2 = point[0], y2 = point[1];
OS.memcpy(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;
public void addString(String string, float x, float y, Font font) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
int length = string.length();
if (length == 0) return;
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.memcpy(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.memcpy(record, layoutRecords[0] + (i * ATSLayoutRecord.sizeof), ATSLayoutRecord.sizeof);
originX = x + (float)OS.Fix2X(record.realPos);
if (deltaYs[0] == 0) {
originY = y;
} else {
OS.memcpy(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();
}
public void close() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGPathCloseSubpath(handle);
}
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);
//TODO - see windows
int pixel = OS.NewPtr(4);
if (pixel == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int[] buffer = new int[]{0xFFFFFFFF};
OS.memcpy(pixel, buffer, 4);
int provider = OS.CGDataProviderCreateWithData(0, pixel, 4, 0);
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;
OS.CGContextSetLineCap(context, data.lineCap);
OS.CGContextSetLineJoin(context, data.lineJoin);
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.memcpy(buffer, pixel, 4);
OS.DisposePtr(pixel);
return buffer[0] != 0xFFFFFFFF;
}
public void curveTo(float cx1, float cy1, float cx2, float cy2, float x, float y) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGPathAddCurveToPoint(handle, null, cx1, cy1, cx2, cy2, x, y);
}
public void dispose() {
if (handle == 0) return;
OS.CGPathRelease(handle);
handle = 0;
if (device.tracking) device.dispose_Object(this);
device = null;
}
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;
}
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();
OS.CGPathGetCurrentPoint(handle, pt);
point[0] = pt.x;
point[1] = pt.y;
}
public boolean isDisposed() {
return handle == 0;
}
public void lineTo(float x, float y) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGPathAddLineToPoint(handle, null, x, y);
}
public void moveTo(float x, float y) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGPathMoveToPoint(handle, null, x, y);
}
public void quadTo(float cx, float cy, float x, float y) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGPathAddQuadCurveToPoint(handle, null, cx, cy, x, y);
}
public String toString () {
if (isDisposed()) return "Path {*DISPOSED*}";
return "Path {" + handle + "}";
}
}
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