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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
#import "XADSWFGeometry.h"
#import <math.h>
SWFPoint SWFPointOnLine(SWFPoint a,SWFPoint b,float t)
{
return SWFMakePoint(
(float)a.x*(1-t)+(float)b.x*t,
(float)a.y*(1-t)+(float)b.y*t
);
}
SWFRect SWFParseRect(CSHandle *fh)
{
int bits=[fh readBits:5];
int xmin=[fh readSignedBits:bits];
int xmax=[fh readSignedBits:bits];
int ymin=[fh readSignedBits:bits];
int ymax=[fh readSignedBits:bits];
[fh flushReadBits];
return SWFMakeRect(xmin,ymin,xmax-xmin,ymax-ymin);
}
void SWFWriteRect(SWFRect rect,CSHandle *fh)
{
int xmin=rect.x;
int xmax=rect.x+rect.width;
int ymin=rect.y;
int ymax=rect.y+rect.height;
int bits=SWFCountSignedBits4(xmin,xmax,ymin,ymax);
[fh writeSignedBits:5 value:bits];
[fh writeSignedBits:bits value:xmin];
[fh writeSignedBits:bits value:xmax];
[fh writeSignedBits:bits value:ymin];
[fh writeSignedBits:bits value:ymax];
[fh flushWriteBits];
}
SWFMatrix SWFParseMatrix(CSHandle *fh)
{
int a00=1<<16,a01=0,a02=0;
int a10=0,a11=1<<16,a12=0;
if([fh readBits:1])
{
int bits=[fh readBits:5];
a00=[fh readSignedBits:bits];
a11=[fh readSignedBits:bits];
}
if([fh readBits:1])
{
int bits=[fh readBits:5];
a10=[fh readSignedBits:bits];
a01=[fh readSignedBits:bits];
}
int bits=[fh readBits:5];
a02=[fh readSignedBits:bits];
a12=[fh readSignedBits:bits];
[fh flushReadBits];
return SWFMakeMatrix(a00,a01,a02,a10,a11,a12);
}
void SWFWriteMatrix(SWFMatrix mtx,CSHandle *fh)
{
if(mtx.a00!=1<<16||mtx.a11!=1<<16)
{
int bits=SWFCountSignedBits2(mtx.a00,mtx.a11);
[fh writeBits:1 value:1];
[fh writeBits:5 value:bits];
[fh writeBits:bits value:mtx.a00];
[fh writeBits:bits value:mtx.a11];
}
else [fh writeBits:1 value:0];
if(mtx.a01!=0||mtx.a10!=0)
{
int bits=SWFCountSignedBits2(mtx.a01,mtx.a10);
[fh writeBits:1 value:1];
[fh writeBits:5 value:bits];
[fh writeBits:bits value:mtx.a10];
[fh writeBits:bits value:mtx.a01];
}
else [fh writeBits:1 value:0];
int bits=SWFCountSignedBits2(mtx.a02,mtx.a12);
[fh writeBits:5 value:bits];
[fh writeBits:bits value:mtx.a02];
[fh writeBits:bits value:mtx.a12];
[fh flushWriteBits];
}
static inline int fixmult(int a,int b) { return (((int64_t)a)*((int64_t)b))/65536; }
SWFMatrix SWFMultiplyMatrices(SWFMatrix a,SWFMatrix b)
{
return SWFMakeMatrix(
fixmult(a.a00,b.a00)+fixmult(a.a01,b.a10),
fixmult(a.a00,b.a01)+fixmult(a.a01,b.a11),
fixmult(a.a00,b.a02)+fixmult(a.a01,b.a12)+a.a02,
fixmult(a.a10,b.a00)+fixmult(a.a11,b.a10),
fixmult(a.a10,b.a01)+fixmult(a.a11,b.a11),
fixmult(a.a10,b.a02)+fixmult(a.a11,b.a12)+a.a12
);
}
SWFMatrix SWFScalingMatrix(float x_scale,float y_scale)
{
return SWFMakeMatrix(
65536*x_scale,0,0,
0,65536*y_scale,0
);
}
SWFMatrix SWFRotationMatrix(float degrees)
{
double rad=degrees*M_PI/180;
return SWFMakeMatrix(
65536*cos(rad),-65536*sin(rad),0,
65536*sin(rad),65536*cos(rad),0
);
}
/*SWFMatrix SWFMatrixFromAffineTransform(NSAffineTransform *t)
{
NSAffineTransformStruct a=[t transformStruct];
SWFMatrix res={
a.m11*65536.0,a.m21*65536.0,a.tX*20.0,
a.m12*65536.0,a.m22*65536.0,a.tY*20.0
};
return res;
}
NSAffineTransform *SWFAffineTransformFromMatrix(SWFMatrix m)
{
NSAffineTransformStruct a={
(float)m.a00/65536.0,(float)m.a10/65536.0,
(float)m.a01/65536.0,(float)m.a11/65536.0,
(float)m.a02/20.0,(float)m.a12/20.0
}
NSAffineTransform *t=[NSAffineTransform transform];
[transform setTransformStruct:a];
return t;
}*/
static inline int imax(int a,int b) { return a>b?a:b; }
int SWFCountBits(uint32_t val)
{
int res=0;
if(val==0) return 0;
if(val&0xFFFF0000) { res|=16; val>>=16; }
if(val&0x0000FF00) { res|=8; val>>=8; }
if(val&0x000000F0) { res|=4; val>>=4; }
if(val&0x0000000C) { res|=2; val>>=2; }
if(val&0x00000002) { res|=1; }
return res+1;
}
int SWFCountBits2(uint32_t val1,uint32_t val2)
{
return imax(SWFCountBits(val1),SWFCountBits(val2));
}
int SWFCountBits4(uint32_t val1,uint32_t val2,uint32_t val3,uint32_t val4)
{
return imax(SWFCountBits2(val1,val2),SWFCountBits2(val3,val4));
}
int SWFCountSignedBits(int32_t val)
{
if(val==0) return 0;
else if(val<0) return SWFCountBits(~val)+1;
else return SWFCountBits(val)+1;
}
int SWFCountSignedBits2(int32_t val1,int32_t val2)
{
return imax(SWFCountSignedBits(val1),SWFCountSignedBits(val2));
}
int SWFCountSignedBits4(int32_t val1,int32_t val2,int32_t val3,int32_t val4)
{
return imax(SWFCountSignedBits2(val1,val2),SWFCountSignedBits2(val3,val4));
}
|
