46
|
1 |
/*
|
|
2 |
* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).
|
|
3 |
* All rights reserved.
|
|
4 |
* This component and the accompanying materials are made available
|
|
5 |
* under the terms of "Eclipse Public License v1.0"
|
|
6 |
* which accompanies this distribution, and is available
|
|
7 |
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
8 |
*
|
|
9 |
* Initial Contributors:
|
|
10 |
* Nokia Corporation - initial contribution.
|
|
11 |
*
|
|
12 |
* Contributors:
|
|
13 |
*
|
|
14 |
* Description: Graphics Extension Library source file
|
|
15 |
*
|
|
16 |
*/
|
|
17 |
|
|
18 |
|
|
19 |
#include "GfxShape.h"
|
|
20 |
#include "GfxAffineTransform.h"
|
|
21 |
|
|
22 |
|
|
23 |
// ---------------------------------------------------------------------------
|
|
24 |
// Constructors
|
|
25 |
// ---------------------------------------------------------------------------
|
|
26 |
// --------------------------------------------------------------------------
|
|
27 |
// TGfxCurveFlattener::TGfxCurveFlattener( TGfxAffineTransform* aTransform )
|
|
28 |
// ---------------------------------------------------------------------------
|
|
29 |
TGfxCurveFlattener::TGfxCurveFlattener( TGfxAffineTransform* aTransform )
|
|
30 |
{
|
|
31 |
iTransform = aTransform;
|
|
32 |
}
|
|
33 |
|
|
34 |
|
|
35 |
|
|
36 |
// --------------------------------------------------------------------------
|
|
37 |
// void TGfxCurveFlattener::AddSubCurveQuadL( CGfxEdgeListP* aRenderer,
|
|
38 |
// ---------------------------------------------------------------------------
|
|
39 |
void TGfxCurveFlattener::AddSubCurveQuadL( CGfxEdgeListP* aRenderer,
|
|
40 |
TFixPt* aCtrlPoints,
|
|
41 |
TInt32 aLimit )
|
|
42 |
{
|
|
43 |
if ( aLimit <= 0 )
|
|
44 |
{
|
|
45 |
// Add segments to renderer
|
|
46 |
// the first point doesn't have to be transformed
|
|
47 |
// because it is same as the last vertex
|
|
48 |
TFixPt* p2 = aCtrlPoints + 2;
|
|
49 |
iTransform->Transform( p2, 2 );
|
|
50 |
aRenderer->AddPoint( aCtrlPoints[2], aCtrlPoints[3], EFalse, EFalse );
|
|
51 |
aRenderer->AddPoint( aCtrlPoints[4], aCtrlPoints[5], EFalse, EFalse );
|
|
52 |
return;
|
|
53 |
}
|
|
54 |
|
|
55 |
TFixPt left[6], right[6];
|
|
56 |
TFixPt x0, y0, xm, ym, x1, y1;
|
|
57 |
x0 = aCtrlPoints[0];
|
|
58 |
y0 = aCtrlPoints[1];
|
|
59 |
xm = aCtrlPoints[2];
|
|
60 |
ym = aCtrlPoints[3];
|
|
61 |
x1 = aCtrlPoints[4];
|
|
62 |
y1 = aCtrlPoints[5];
|
|
63 |
x0 = ( x0 + xm ) >> 1;
|
|
64 |
y0 = ( y0 + ym ) >> 1;
|
|
65 |
x1 = ( x1 + xm ) >> 1;
|
|
66 |
y1 = ( y1 + ym ) >> 1;
|
|
67 |
xm = ( x0 + x1 ) >> 1;
|
|
68 |
ym = ( y0 + y1 ) >> 1;
|
|
69 |
left[0] = aCtrlPoints[0];
|
|
70 |
left[1] = aCtrlPoints[1];
|
|
71 |
left[2] = x0;
|
|
72 |
left[3] = y0;
|
|
73 |
left[4] = xm;
|
|
74 |
left[5] = ym;
|
|
75 |
right[0] = xm;
|
|
76 |
right[1] = ym;
|
|
77 |
right[2] = x1;
|
|
78 |
right[3] = y1;
|
|
79 |
right[4] = aCtrlPoints[4];
|
|
80 |
right[5] = aCtrlPoints[5];
|
|
81 |
AddSubCurveQuadL( aRenderer, left, aLimit - 1 );
|
|
82 |
AddSubCurveQuadL( aRenderer, right, aLimit - 1 );
|
|
83 |
}
|
|
84 |
|
|
85 |
// --------------------------------------------------------------------------
|
|
86 |
// void TGfxCurveFlattener::AddSubCurveCubicL( CGfxEdgeListP* aRenderer,
|
|
87 |
// ---------------------------------------------------------------------------
|
|
88 |
void TGfxCurveFlattener::AddSubCurveCubicL( CGfxEdgeListP* aRenderer,
|
|
89 |
TFixPt* aCtrlPoints,
|
|
90 |
TInt32 aLimit )
|
|
91 |
{
|
|
92 |
if ( aLimit <= 0 )
|
|
93 |
{
|
|
94 |
// Add segments to renderer
|
|
95 |
TFixPt* p2 = aCtrlPoints + 2;
|
|
96 |
iTransform->Transform( p2, 3 );
|
|
97 |
aRenderer->AddPoint( aCtrlPoints[2], aCtrlPoints[3], EFalse, EFalse );
|
|
98 |
aRenderer->AddPoint( aCtrlPoints[4], aCtrlPoints[5], EFalse, EFalse );
|
|
99 |
aRenderer->AddPoint( aCtrlPoints[6], aCtrlPoints[7], EFalse, EFalse );
|
|
100 |
return;
|
|
101 |
}
|
|
102 |
|
|
103 |
TFixPt left[8], right[8];
|
|
104 |
TFixPt x0, y0, xm, ym, xm1, ym1, xm2, ym2, x1, y1;
|
|
105 |
|
|
106 |
x0 = aCtrlPoints[0];
|
|
107 |
y0 = aCtrlPoints[1];
|
|
108 |
xm1 = aCtrlPoints[2];
|
|
109 |
ym1 = aCtrlPoints[3];
|
|
110 |
xm2 = aCtrlPoints[4];
|
|
111 |
ym2 = aCtrlPoints[5];
|
|
112 |
x1 = aCtrlPoints[6];
|
|
113 |
y1 = aCtrlPoints[7];
|
|
114 |
|
|
115 |
x0 = ( x0 + xm1 ) >> 1;
|
|
116 |
y0 = ( y0 + ym1 ) >> 1;
|
|
117 |
x1 = ( x1 + xm2 ) >> 1;
|
|
118 |
y1 = ( y1 + ym2 ) >> 1;
|
|
119 |
xm = ( xm1 + xm2 ) >> 1;
|
|
120 |
ym = ( ym1 + ym2 ) >> 1;
|
|
121 |
xm1 = ( x0 + xm ) >> 1;
|
|
122 |
ym1 = ( y0 + ym ) >> 1;
|
|
123 |
xm2 = ( x1 + xm ) >> 1;
|
|
124 |
ym2 = ( y1 + ym ) >> 1;
|
|
125 |
xm = ( xm1 + xm2 ) >> 1;
|
|
126 |
ym = ( ym1 + ym2 ) >> 1;
|
|
127 |
|
|
128 |
left[0] = aCtrlPoints[0];
|
|
129 |
left[1] = aCtrlPoints[1];
|
|
130 |
left[2] = x0;
|
|
131 |
left[3] = y0;
|
|
132 |
left[4] = xm1;
|
|
133 |
left[5] = ym1;
|
|
134 |
left[6] = xm;
|
|
135 |
left[7] = ym;
|
|
136 |
right[0] = xm;
|
|
137 |
right[1] = ym;
|
|
138 |
right[2] = xm2;
|
|
139 |
right[3] = ym2;
|
|
140 |
right[4] = x1;
|
|
141 |
right[5] = y1;
|
|
142 |
right[6] = aCtrlPoints[6];
|
|
143 |
right[7] = aCtrlPoints[7];
|
|
144 |
AddSubCurveCubicL( aRenderer, left, aLimit - 1 );
|
|
145 |
AddSubCurveCubicL( aRenderer, right, aLimit - 1 );
|
|
146 |
}
|