1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.graphics;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.Compatibility;
import org.eclipse.swt.internal.carbon.*;
public class Transform {
/**
* the handle to the OS path resource
* (Warning: This field is platform dependent)
*/
public float[] handle;
/**
* the device where this font was created
*/
Device device;
public Transform (Device device) {
this(device, 1, 0, 0, 1, 0, 0);
}
public Transform(Device device, float[] elements) {
this (device, checkTransform(elements)[0], elements[1], elements[2], elements[3], elements[4], elements[5]);
}
public Transform (Device device, float m11, float m12, float m21, float m22, float dx, float dy) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
this.device = device;
handle = new float[6];
OS.CGAffineTransformMake(m11, m12, m21, m22, dx, dy, handle);
if (handle == null) SWT.error(SWT.ERROR_NO_HANDLES);
if (device.tracking) device.new_Object(this);
}
static float[] checkTransform(float[] elements) {
if (elements == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (elements.length < 6) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
return elements;
}
public void dispose() {
if (handle == null) return;
if (device.isDisposed()) return;
handle = null;
if (device.tracking) device.dispose_Object(this);
device = null;
}
public void getElements(float[] elements) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (elements == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (elements.length < 6) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
System.arraycopy(handle, 0, elements, 0, handle.length);
}
public void invert() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if ((handle [0] * handle [3] - handle [1] * handle [2]) == 0) {
SWT.error(SWT.ERROR_CANNOT_INVERT_MATRIX);
}
OS.CGAffineTransformInvert(handle, handle);
}
public boolean isDisposed() {
return handle == null;
}
public boolean isIdentity() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return handle[0] == 1 && handle[1] == 0 && handle[2] == 0 && handle[3] == 1 && handle[4] == 0 && handle[5] == 0;
}
public void multiply(Transform matrix) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (matrix == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (matrix.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
OS.CGAffineTransformConcat(matrix.handle, handle, handle);
}
public void rotate(float angle) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGAffineTransformRotate(handle, angle * (float)Compatibility.PI / 180, handle);
}
public void scale(float scaleX, float scaleY) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGAffineTransformScale(handle, scaleX, scaleY, handle);
}
public void setElements(float m11, float m12, float m21, float m22, float dx, float dy) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGAffineTransformMake(m11, m12, m21, m22, dx, dy, handle);
}
public void transform(float[] pointArray) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
CGPoint point = new CGPoint();
int length = pointArray.length / 2;
for (int i = 0, j = 0; i < length; i++, j += 2) {
point.x = pointArray[j];
point.y = pointArray[j + 1];
OS.CGPointApplyAffineTransform(point, handle, point);
pointArray[j] = point.x;
pointArray[j + 1] = point.y;
}
}
public void translate(float offsetX, float offsetY) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.CGAffineTransformTranslate(handle, offsetX, offsetY, handle);
}
public String toString() {
if (isDisposed()) return "Transform {*DISPOSED*}";
float[] elements = new float[6];
getElements(elements);
return "Transform {" + elements [0] + "," + elements [1] + "," +elements [2] + "," +elements [3] + "," +elements [4] + "," +elements [5] + "}";
}
}
|
