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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* Copyright IBM Corporation 1987,1988,1989
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of IBM not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include "xf4bpp.h"
#include "ppcGCstr.h"
/* xf4bppGetReducedColorRrop( pGC, drawableDepth, returnLoc )
* An attempt to do "strength reduction" on color raster-ops
* P. Shupak 1/88
*/
static void
ppcReduceGeneral
(
register int alu,
register unsigned long pm,
register unsigned long fg,
register unsigned long bg,
register int fillStyle,
int drawableDepth,
ppcReducedRrop *returnLoc
)
{
if ( ( alu == GXnoop )
|| !( pm &= ( ( 1 << drawableDepth ) - 1 ) ) ) {
returnLoc->alu = GXnoop ;
return ;
}
#ifdef DELETE_THIS
switch ( fillStyle ) {
case FillTiled:
switch ( alu ) {
case GXclear: /* 0x0 Zero 0 */
case GXinvert: /* 0xa NOT dst */
case GXset: /* 0xf 1 */
fillStyle = FillSolid ;
default: /* We Can't Do Much Here */
break ;
}
break ;
case FillOpaqueStippled:
if ( ( fg & pm ) != ( bg & pm ) ) { /* else FillSolid */
switch ( alu ) {
case GXclear: /* 0x0 Zero 0 */
case GXset: /* 0xf 1 */
case GXinvert: /* 0xa NOT dst */
fillStyle = FillSolid ;
break ;
case GXnor: /* 0x8 NOT src AND NOT dst */
case GXnand: /* 0xe NOT src OR NOT dst */
case GXcopy: /* 0x3 src */
break ;
case GXandReverse: /* 0x2 src AND NOT dst */
fg = ~fg ;
bg = ~bg ;
alu = GXnor ;
break ;
case GXandInverted: /* 0x4 NOT src AND dst */
fg = ~fg ;
bg = ~bg ;
alu = GXand ; /* Fall Through */
case GXand: /* 0x1 src AND dst */
pm &= ~( fg & bg ) ;
if ( ( bg & pm ) == pm ) {
fillStyle = FillStippled ;
alu = GXclear ;
}
break ;
case GXequiv: /* 0x9 NOT src XOR dst */
fg = ~fg ;
bg = ~bg ;
alu = GXxor ; /* Fall Through */
case GXxor: /* 0x6 src XOR dst */
pm &= ( fg | bg ) ;
if ( !( bg & pm ) ) {
fillStyle = FillStippled ;
alu = GXinvert ;
}
break ;
case GXorReverse: /* 0xb src OR NOT dst */
fg = ~fg ;
bg = ~bg ;
alu = GXnand ;
break ;
case GXcopyInverted: /* 0xc NOT src */
fg = ~fg ;
bg = ~bg ;
alu = GXcopy ;
break ;
case GXorInverted: /* 0xd NOT src OR dst */
fg = ~fg ;
bg = ~bg ;
alu = GXor ; /* Fall Through */
case GXor: /* 0x7 src OR dst */
pm &= ( fg | bg ) ;
if ( !( bg & pm ) ) {
fillStyle = FillStippled ;
alu = GXset ;
}
break ;
default:
ErrorF(
"xf4bppGetReducedColorRrop: Unknown Alu Raster-Op" ) ;
break ;
}
break ; /* Don't Fall Through */
}
else
fillStyle = FillSolid ;
/* Fall Through */
case FillStippled:
case FillSolid:
switch ( alu ) {
case GXclear: /* 0x0 Zero 0 */
case GXset: /* 0xf 1 */
case GXinvert: /* 0xa NOT dst */
break ;
case GXand: /* 0x1 src AND dst */
pm &= ~fg ;
alu = GXclear ;
break ;
case GXandReverse: /* 0x2 src AND NOT dst */
fg = ~fg ;
alu = GXnor ; /* Fall Through */
case GXnor: /* 0x8 NOT src AND NOT dst */
if ( !( fg & pm ) )
alu = GXclear ;
else if ( ( fg & pm ) == pm )
alu = GXinvert ;
break ;
case GXandInverted: /* 0x4 NOT src AND dst */
pm &= fg ;
alu = GXclear ;
break ;
case GXxor: /* 0x6 src XOR dst */
pm &= fg ;
alu = GXinvert ;
break ;
case GXor: /* 0x7 src OR dst */
pm &= fg ;
alu = GXset ;
break ;
case GXequiv: /* 0x9 NOT src XOR dst */
pm &= ~fg ;
alu = GXinvert ;
break ;
case GXorReverse: /* 0xb src OR NOT dst */
fg = ~fg ;
alu = GXnand ; /* Fall Through */
case GXnand: /* 0xe NOT src OR NOT dst */
if ( !( fg & pm ) )
alu = GXset ;
else if ( ( fg & pm ) == pm )
alu = GXinvert ;
break ;
case GXcopyInverted: /* 0xc NOT src */
fg = ~fg ;
alu = GXcopy ; /* Fall Through */
case GXcopy: /* 0x3 src */
if ( !( fg & pm ) )
alu = GXclear ;
else if ( ( fg & pm ) == pm )
alu = GXset ;
break ;
case GXorInverted: /* 0xd NOT src OR dst */
pm &= ~fg ;
alu = GXset ;
break ;
default:
ErrorF(
"xf4bppGetReducedColorRrop: Unknown Alu Raster-Op" ) ;
break ;
}
break;
default:
ErrorF("xf4bppGetReducedColorRrop: Bad Fillstyle\n");
break;
}
#endif
/* Final Test On Restricted Plane Mask */
if ( !pm )
alu = GXnoop ;
/* Set Actual Returned Values */
returnLoc->planemask = pm ;
returnLoc->fgPixel = fg ;
returnLoc->bgPixel = bg ;
returnLoc->alu = alu ;
returnLoc->fillStyle = fillStyle ;
return ;
}
void
xf4bppGetReducedColorRrop( pGC, drawableDepth, returnLoc )
GC *pGC ;
int drawableDepth ;
ppcReducedRrop *returnLoc ;
{
ppcReduceGeneral( pGC->alu,
pGC->planemask,
pGC->fgPixel,
pGC->bgPixel,
pGC->fillStyle,
drawableDepth,
returnLoc ) ;
return ;
}
|
