1/*
2 * Copyright © 1998 Keith Packard
3 * Copyright © 2012 Intel Corporation
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of Keith Packard not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission.  Keith Packard makes no
12 * representations about the suitability of this software for any purpose.  It
13 * is provided "as is" without express or implied warranty.
14 *
15 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
22 */
23
24#ifndef _FBROP_H_
25#define _FBROP_H_
26
27#define FbDestInvarientRop(alu,pm)  ((pm) == FB_ALLONES && \
28				     (((alu) >> 1 & 5) == ((alu) & 5)))
29
30#define FbDestInvarientMergeRop()   (_ca1 == 0 && _cx1 == 0)
31
32/* AND has higher precedence than XOR */
33
34#define FbDoMergeRop(src, dst) \
35    (((dst) & (((src) & _ca1) ^ _cx1)) ^ (((src) & _ca2) ^ _cx2))
36
37#define FbDoDestInvarientMergeRop(src)	(((src) & _ca2) ^ _cx2)
38
39#define FbDoMaskMergeRop(src, dst, mask) \
40    (((dst) & ((((src) & _ca1) ^ _cx1) | ~(mask))) ^ ((((src) & _ca2) ^ _cx2) & (mask)))
41
42#define FbDoLeftMaskByteMergeRop(dst, src, lb, l) { \
43    FbBits  __xor = ((src) & _ca2) ^ _cx2; \
44    FbDoLeftMaskByteRRop(dst,lb,l,((src) & _ca1) ^ _cx1,__xor); \
45}
46
47#define FbDoRightMaskByteMergeRop(dst, src, rb, r) { \
48    FbBits  __xor = ((src) & _ca2) ^ _cx2; \
49    FbDoRightMaskByteRRop(dst,rb,r,((src) & _ca1) ^ _cx1,__xor); \
50}
51
52#define FbDoRRop(dst, and, xor)	(((dst) & (and)) ^ (xor))
53
54#define FbDoMaskRRop(dst, and, xor, mask) \
55    (((dst) & ((and) | ~(mask))) ^ (xor & mask))
56
57/*
58 * Take a single bit (0 or 1) and generate a full mask
59 */
60#define fbFillFromBit(b,t)	(~((t) ((b) & 1)-1))
61
62#define fbXorT(rop,fg,pm,t) ((((fg) & fbFillFromBit((rop) >> 1,t)) | \
63			      (~(fg) & fbFillFromBit((rop) >> 3,t))) & (pm))
64
65#define fbAndT(rop,fg,pm,t) ((((fg) & fbFillFromBit (rop ^ (rop>>1),t)) | \
66			      (~(fg) & fbFillFromBit((rop>>2) ^ (rop>>3),t))) | \
67			     ~(pm))
68
69#define fbXor(rop,fg,pm)	fbXorT(rop,fg,pm,FbBits)
70
71#define fbAnd(rop,fg,pm)	fbAndT(rop,fg,pm,FbBits)
72
73#define fbXorStip(rop,fg,pm)    fbXorT(rop,fg,pm,FbStip)
74
75#define fbAndStip(rop,fg,pm)	fbAndT(rop,fg,pm,FbStip)
76
77/*
78 * Stippling operations;
79 */
80extern const FbBits *const fbStippleTable[];
81
82#define FbStippleRRop(dst, b, fa, fx, ba, bx) \
83    (FbDoRRop(dst, fa, fx) & b) | (FbDoRRop(dst, ba, bx) & ~b)
84
85#define FbStippleRRopMask(dst, b, fa, fx, ba, bx, m) \
86    (FbDoMaskRRop(dst, fa, fx, m) & (b)) | (FbDoMaskRRop(dst, ba, bx, m) & ~(b))
87
88#define FbDoLeftMaskByteStippleRRop(dst, b, fa, fx, ba, bx, lb, l) { \
89    FbBits  __xor = ((fx) & (b)) | ((bx) & ~(b)); \
90    FbDoLeftMaskByteRRop(dst, lb, l, ((fa) & (b)) | ((ba) & ~(b)), __xor); \
91}
92
93#define FbDoRightMaskByteStippleRRop(dst, b, fa, fx, ba, bx, rb, r) { \
94    FbBits  __xor = ((fx) & (b)) | ((bx) & ~(b)); \
95    FbDoRightMaskByteRRop(dst, rb, r, ((fa) & (b)) | ((ba) & ~(b)), __xor); \
96}
97
98#define FbOpaqueStipple(b, fg, bg) (((fg) & (b)) | ((bg) & ~(b)))
99
100/*
101 * Compute rop for using tile code for 1-bit dest stipples; modifies
102 * existing rop to flip depending on pixel values
103 */
104#define FbStipple1RopPick(alu,b)    (((alu) >> (2 - (((b) & 1) << 1))) & 3)
105
106#define FbOpaqueStipple1Rop(alu,fg,bg)    (FbStipple1RopPick(alu,fg) | \
107					   (FbStipple1RopPick(alu,bg) << 2))
108
109#define FbStipple1Rop(alu,fg)	    (FbStipple1RopPick(alu,fg) | 4)
110
111#endif
112