| 1 | /* $XFree86: xc/programs/Xserver/mfb/maskbits.h,v 3.8tsi Exp $ */
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| 2 | /* Combined Purdue/PurduePlus patches, level 2.1, 1/24/89 */
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| 3 | /***********************************************************
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| 4 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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| 5 |
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| 6 | All Rights Reserved
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| 7 |
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| 8 | Permission to use, copy, modify, and distribute this software and its
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| 9 | documentation for any purpose and without fee is hereby granted,
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| 10 | provided that the above copyright notice appear in all copies and that
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| 11 | both that copyright notice and this permission notice appear in
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| 12 | supporting documentation, and that the name of Digital not be
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| 13 | used in advertising or publicity pertaining to distribution of the
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| 14 | software without specific, written prior permission.
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| 15 |
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| 16 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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| 17 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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| 18 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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| 19 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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| 20 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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| 21 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 22 | SOFTWARE.
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| 23 |
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| 24 | ******************************************************************/
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| 25 | /* $Xorg: maskbits.h,v 1.3 2000/08/17 19:53:34 cpqbld Exp $ */
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| 26 |
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| 27 | #ifdef HAVE_DIX_CONFIG_H
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| 28 | #include <dix-config.h>
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| 29 | #endif
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| 30 |
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| 31 | #include <X11/X.h>
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| 32 | #include <X11/Xmd.h>
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| 33 | #include "servermd.h"
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| 34 |
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| 35 |
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| 36 | /* the following notes use the following conventions:
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| 37 | SCREEN LEFT SCREEN RIGHT
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| 38 | in this file and maskbits.c, left and right refer to screen coordinates,
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| 39 | NOT bit numbering in registers.
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| 40 |
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| 41 | starttab[n]
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| 42 | bits[0,n-1] = 0 bits[n,PLST] = 1
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| 43 | endtab[n] =
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| 44 | bits[0,n-1] = 1 bits[n,PLST] = 0
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| 45 |
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| 46 | startpartial[], endpartial[]
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| 47 | these are used as accelerators for doing putbits and masking out
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| 48 | bits that are all contained between longword boudaries. the extra
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| 49 | 256 bytes of data seems a small price to pay -- code is smaller,
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| 50 | and narrow things (e.g. window borders) go faster.
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| 51 |
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| 52 | the names may seem misleading; they are derived not from which end
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| 53 | of the word the bits are turned on, but at which end of a scanline
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| 54 | the table tends to be used.
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| 55 |
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| 56 | look at the tables and macros to understand boundary conditions.
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| 57 | (careful readers will note that starttab[n] = ~endtab[n] for n != 0)
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| 58 |
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| 59 | -----------------------------------------------------------------------
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| 60 | these two macros depend on the screen's bit ordering.
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| 61 | in both of them x is a screen position. they are used to
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| 62 | combine bits collected from multiple longwords into a
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| 63 | single destination longword, and to unpack a single
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| 64 | source longword into multiple destinations.
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| 65 |
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| 66 | SCRLEFT(dst, x)
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| 67 | takes dst[x, PPW] and moves them to dst[0, PPW-x]
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| 68 | the contents of the rest of dst are 0.
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| 69 | this is a right shift on LSBFirst (forward-thinking)
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| 70 | machines like the VAX, and left shift on MSBFirst
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| 71 | (backwards) machines like the 680x0 and pc/rt.
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| 72 |
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| 73 | SCRRIGHT(dst, x)
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| 74 | takes dst[0,x] and moves them to dst[PPW-x, PPW]
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| 75 | the contents of the rest of dst are 0.
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| 76 | this is a left shift on LSBFirst, right shift
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| 77 | on MSBFirst.
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| 78 |
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| 79 |
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| 80 | the remaining macros are cpu-independent; all bit order dependencies
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| 81 | are built into the tables and the two macros above.
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| 82 |
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| 83 | maskbits(x, w, startmask, endmask, nlw)
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| 84 | for a span of width w starting at position x, returns
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| 85 | a mask for ragged bits at start, mask for ragged bits at end,
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| 86 | and the number of whole longwords between the ends.
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| 87 |
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| 88 | maskpartialbits(x, w, mask)
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| 89 | works like maskbits(), except all the bits are in the
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| 90 | same longword (i.e. (x&PIM + w) <= PPW)
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| 91 |
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| 92 | maskPPWbits(x, w, startmask, endmask, nlw)
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| 93 | as maskbits, but does not calculate nlw. it is used by
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| 94 | mfbGlyphBlt to put down glyphs <= PPW bits wide.
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| 95 |
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| 96 | -------------------------------------------------------------------
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| 97 |
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| 98 | NOTE
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| 99 | any pointers passed to the following 4 macros are
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| 100 | guranteed to be PPW-bit aligned.
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| 101 | The only non-PPW-bit-aligned references ever made are
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| 102 | to font glyphs, and those are made with getleftbits()
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| 103 | and getshiftedleftbits (qq.v.)
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| 104 |
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| 105 | For 64-bit server, it is assumed that we will never have font padding
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| 106 | of more than 4 bytes. The code uses int's to access the fonts
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| 107 | intead of longs.
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| 108 |
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| 109 | getbits(psrc, x, w, dst)
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| 110 | starting at position x in psrc (x < PPW), collect w
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| 111 | bits and put them in the screen left portion of dst.
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| 112 | psrc is a longword pointer. this may span longword boundaries.
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| 113 | it special-cases fetching all w bits from one longword.
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| 114 |
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| 115 | +--------+--------+ +--------+
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| 116 | | | m |n| | ==> | m |n| |
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| 117 | +--------+--------+ +--------+
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| 118 | x x+w 0 w
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| 119 | psrc psrc+1 dst
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| 120 | m = PPW - x
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| 121 | n = w - m
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| 122 |
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| 123 | implementation:
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| 124 | get m bits, move to screen-left of dst, zeroing rest of dst;
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| 125 | get n bits from next word, move screen-right by m, zeroing
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| 126 | lower m bits of word.
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| 127 | OR the two things together.
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| 128 |
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| 129 | putbits(src, x, w, pdst)
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| 130 | starting at position x in pdst, put down the screen-leftmost
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| 131 | w bits of src. pdst is a longword pointer. this may
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| 132 | span longword boundaries.
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| 133 | it special-cases putting all w bits into the same longword.
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| 134 |
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| 135 | +--------+ +--------+--------+
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| 136 | | m |n| | ==> | | m |n| |
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| 137 | +--------+ +--------+--------+
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| 138 | 0 w x x+w
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| 139 | dst pdst pdst+1
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| 140 | m = PPW - x
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| 141 | n = w - m
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| 142 |
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| 143 | implementation:
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| 144 | get m bits, shift screen-right by x, zero screen-leftmost x
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| 145 | bits; zero rightmost m bits of *pdst and OR in stuff
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| 146 | from before the semicolon.
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| 147 | shift src screen-left by m, zero bits n-PPW;
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| 148 | zero leftmost n bits of *(pdst+1) and OR in the
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| 149 | stuff from before the semicolon.
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| 150 |
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| 151 | putbitsrop(src, x, w, pdst, ROP)
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| 152 | like putbits but calls DoRop with the rasterop ROP (see mfb.h for
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| 153 | DoRop)
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| 154 |
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| 155 | putbitsrrop(src, x, w, pdst, ROP)
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| 156 | like putbits but calls DoRRop with the reduced rasterop ROP
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| 157 | (see mfb.h for DoRRop)
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| 158 |
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| 159 | -----------------------------------------------------------------------
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| 160 | The two macros below are used only for getting bits from glyphs
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| 161 | in fonts, and glyphs in fonts are gotten only with the following two
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| 162 | mcros.
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| 163 | You should tune these macros toyour font format and cpu
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| 164 | byte ordering.
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| 165 |
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| 166 | NOTE
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| 167 | getleftbits(psrc, w, dst)
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| 168 | get the leftmost w (w<=32) bits from *psrc and put them
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| 169 | in dst. this is used by the mfbGlyphBlt code for glyphs
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| 170 | <=PPW bits wide.
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| 171 | psrc is declared (unsigned char *)
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| 172 |
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| 173 | psrc is NOT guaranteed to be PPW-bit aligned. on many
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| 174 | machines this will cause problems, so there are several
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| 175 | versions of this macro.
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| 176 |
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| 177 | this macro is called ONLY for getting bits from font glyphs,
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| 178 | and depends on the server-natural font padding.
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| 179 |
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| 180 | for blazing text performance, you want this macro
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| 181 | to touch memory as infrequently as possible (e.g.
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| 182 | fetch longwords) and as efficiently as possible
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| 183 | (e.g. don't fetch misaligned longwords)
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| 184 |
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| 185 | getshiftedleftbits(psrc, offset, w, dst)
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| 186 | used by the font code; like getleftbits, but shifts the
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| 187 | bits SCRLEFT by offset.
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| 188 | this is implemented portably, calling getleftbits()
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| 189 | and SCRLEFT().
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| 190 | psrc is declared (unsigned char *).
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| 191 | */
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| 192 |
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| 193 | /* to match CFB and allow algorithm sharing ...
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| 194 | * name mfb32 mfb64 explanation
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| 195 | * ---- ------ ----- -----------
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| 196 | * PGSZ 32 64 pixel group size (in bits; same as PPW for mfb)
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| 197 | * PGSZB 4 8 pixel group size (in bytes)
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| 198 | * PPW 32 64 pixels per word (pixels per pixel group)
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| 199 | * PLST 31 63 index of last pixel in a word (should be PPW-1)
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| 200 | * PIM 0x1f 0x3f pixel index mask (index within a pixel group)
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| 201 | * PWSH 5 6 pixel-to-word shift (should be log2(PPW))
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| 202 | *
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| 203 | * The MFB_ versions are here so that cfb can include maskbits.h to get
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| 204 | * the bitmap constants without conflicting with its own P* constants.
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| 205 | *
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| 206 | * Keith Packard ([email protected]):
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| 207 | * Note mfb64 is no longer supported; it requires DIX support
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| 208 | * for realigning images which costs too much
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| 209 | */
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| 210 |
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| 211 | /* warning: PixelType definition duplicated in mfb.h */
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| 212 | #ifndef PixelType
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| 213 | #define PixelType CARD32
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| 214 | #endif /* PixelType */
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| 215 | #ifndef MfbBits
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| 216 | #define MfbBits CARD32
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| 217 | #endif
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| 218 |
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| 219 | #define MFB_PGSZB 4
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| 220 | #define MFB_PPW (MFB_PGSZB<<3) /* assuming 8 bits per byte */
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| 221 | #define MFB_PGSZ MFB_PPW
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| 222 | #define MFB_PLST (MFB_PPW-1)
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| 223 | #define MFB_PIM MFB_PLST
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| 224 |
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| 225 | /* set PWSH = log2(PPW) using brute force */
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| 226 |
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| 227 | #if MFB_PPW == 32
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| 228 | #define MFB_PWSH 5
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| 229 | #endif /* MFB_PPW == 32 */
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| 230 |
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| 231 | /* XXX don't use these five */
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| 232 | extern PixelType starttab[];
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| 233 | extern PixelType endtab[];
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| 234 | extern PixelType partmasks[MFB_PPW][MFB_PPW];
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| 235 | extern PixelType rmask[];
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| 236 | extern PixelType mask[];
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| 237 | /* XXX use these five */
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| 238 | extern PixelType mfbGetstarttab(int);
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| 239 | extern PixelType mfbGetendtab(int);
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| 240 | extern PixelType mfbGetpartmasks(int, int);
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| 241 | extern PixelType mfbGetrmask(int);
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| 242 | extern PixelType mfbGetmask(int);
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| 243 |
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| 244 | #ifndef MFB_CONSTS_ONLY
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| 245 |
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| 246 | #define PGSZB MFB_PGSZB
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| 247 | #define PPW MFB_PPW
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| 248 | #define PGSZ MFB_PGSZ
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| 249 | #define PLST MFB_PLST
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| 250 | #define PIM MFB_PIM
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| 251 | #define PWSH MFB_PWSH
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| 252 |
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| 253 | #define BitLeft(b,s) SCRLEFT(b,s)
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| 254 | #define BitRight(b,s) SCRRIGHT(b,s)
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| 255 |
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| 256 | #ifdef XFree86Server
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| 257 | #define LONG2CHARSSAMEORDER(x) ((MfbBits)(x))
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| 258 | #define LONG2CHARSDIFFORDER( x ) ( ( ( ( x ) & (MfbBits)0x000000FF ) << 0x18 ) \
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| 259 | | ( ( ( x ) & (MfbBits)0x0000FF00 ) << 0x08 ) \
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| 260 | | ( ( ( x ) & (MfbBits)0x00FF0000 ) >> 0x08 ) \
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| 261 | | ( ( ( x ) & (MfbBits)0xFF000000 ) >> 0x18 ) )
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| 262 | #endif /* XFree86Server */
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| 263 |
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| 264 | #if (BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER)
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| 265 | #define LONG2CHARS(x) ((MfbBits)(x))
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| 266 | #else
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| 267 | /*
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| 268 | * the unsigned case below is for compilers like
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| 269 | * the Danbury C and i386cc
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| 270 | */
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| 271 | #define LONG2CHARS( x ) ( ( ( ( x ) & (MfbBits)0x000000FF ) << 0x18 ) \
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| 272 | | ( ( ( x ) & (MfbBits)0x0000FF00 ) << 0x08 ) \
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| 273 | | ( ( ( x ) & (MfbBits)0x00FF0000 ) >> 0x08 ) \
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| 274 | | ( ( ( x ) & (MfbBits)0xFF000000 ) >> 0x18 ) )
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| 275 | #endif /* BITMAP_BIT_ORDER */
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| 276 |
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| 277 | #ifdef STRICT_ANSI_SHIFT
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| 278 | #define SHL(x,y) ((y) >= PPW ? 0 : LONG2CHARS(LONG2CHARS(x) << (y)))
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| 279 | #define SHR(x,y) ((y) >= PPW ? 0 : LONG2CHARS(LONG2CHARS(x) >> (y)))
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| 280 | #else
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| 281 | #define SHL(x,y) LONG2CHARS(LONG2CHARS(x) << (y))
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| 282 | #define SHR(x,y) LONG2CHARS(LONG2CHARS(x) >> (y))
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| 283 | #endif
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| 284 |
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| 285 | #if (BITMAP_BIT_ORDER == MSBFirst) /* pc/rt, 680x0 */
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| 286 | #define SCRLEFT(lw, n) SHL((PixelType)(lw),(n))
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| 287 | #define SCRRIGHT(lw, n) SHR((PixelType)(lw),(n))
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| 288 | #else /* vax, intel */
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| 289 | #define SCRLEFT(lw, n) SHR((PixelType)(lw),(n))
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| 290 | #define SCRRIGHT(lw, n) SHL((PixelType)(lw),(n))
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| 291 | #endif
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| 292 |
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| 293 | #define DoRRop(alu, src, dst) \
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| 294 | (((alu) == RROP_BLACK) ? ((dst) & ~(src)) : \
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| 295 | ((alu) == RROP_WHITE) ? ((dst) | (src)) : \
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| 296 | ((alu) == RROP_INVERT) ? ((dst) ^ (src)) : \
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| 297 | (dst))
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| 298 |
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| 299 | /* A generalized form of a x4 Duff's Device */
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| 300 | #define Duff(counter, block) { \
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| 301 | while (counter >= 4) {\
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| 302 | { block; } \
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| 303 | { block; } \
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| 304 | { block; } \
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| 305 | { block; } \
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| 306 | counter -= 4; \
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| 307 | } \
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| 308 | switch (counter & 3) { \
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| 309 | case 3: { block; } \
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| 310 | case 2: { block; } \
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| 311 | case 1: { block; } \
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| 312 | case 0: \
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| 313 | counter = 0; \
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| 314 | } \
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| 315 | }
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| 316 |
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| 317 | #define maskbits(x, w, startmask, endmask, nlw) \
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| 318 | startmask = mfbGetstarttab((x) & PIM); \
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| 319 | endmask = mfbGetendtab(((x)+(w)) & PIM); \
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| 320 | if (startmask) \
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| 321 | nlw = (((w) - (PPW - ((x) & PIM))) >> PWSH); \
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| 322 | else \
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| 323 | nlw = (w) >> PWSH;
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| 324 |
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| 325 | #define maskpartialbits(x, w, mask) \
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| 326 | mask = mfbGetpartmasks((x) & PIM, (w) & PIM);
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| 327 |
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| 328 | #define maskPPWbits(x, w, startmask, endmask) \
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| 329 | startmask = mfbGetstarttab((x) & PIM); \
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| 330 | endmask = mfbGetendtab(((x)+(w)) & PIM);
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| 331 |
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| 332 | #ifdef __GNUC__ /* XXX don't want for Alpha? */
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| 333 | #ifdef vax
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| 334 | #define FASTGETBITS(psrc,x,w,dst) \
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| 335 | __asm ("extzv %1,%2,%3,%0" \
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| 336 | : "=g" (dst) \
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| 337 | : "g" (x), "g" (w), "m" (*(char *)(psrc)))
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| 338 | #define getbits(psrc,x,w,dst) FASTGETBITS(psrc,x,w,dst)
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| 339 |
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| 340 | #define FASTPUTBITS(src, x, w, pdst) \
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| 341 | __asm ("insv %3,%1,%2,%0" \
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| 342 | : "=m" (*(char *)(pdst)) \
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| 343 | : "g" (x), "g" (w), "g" (src))
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| 344 | #define putbits(src, x, w, pdst) FASTPUTBITS(src, x, w, pdst)
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| 345 | #endif /* vax */
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| 346 | #ifdef mc68020
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| 347 | #define FASTGETBITS(psrc, x, w, dst) \
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| 348 | __asm ("bfextu %3{%1:%2},%0" \
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| 349 | : "=d" (dst) : "di" (x), "di" (w), "o" (*(char *)(psrc)))
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| 350 |
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| 351 | #define getbits(psrc,x,w,dst) \
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| 352 | { \
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| 353 | FASTGETBITS(psrc, x, w, dst);\
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| 354 | dst = SHL(dst,(32-(w))); \
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| 355 | }
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| 356 |
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| 357 | #define FASTPUTBITS(src, x, w, pdst) \
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| 358 | __asm ("bfins %3,%0{%1:%2}" \
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| 359 | : "=o" (*(char *)(pdst)) \
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| 360 | : "di" (x), "di" (w), "d" (src), "0" (*(char *) (pdst)))
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| 361 |
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| 362 | #define putbits(src, x, w, pdst) FASTPUTBITS(SHR((src),32-(w)), x, w, pdst)
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| 363 |
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| 364 | #endif /* mc68020 */
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| 365 | #endif /* __GNUC__ */
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| 366 |
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| 367 | /* The following flag is used to override a bugfix for sun 3/60+CG4 machines,
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| 368 | */
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| 369 |
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| 370 | /* We don't need to be careful about this unless we're dealing with sun3's
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| 371 | * We will default its usage for those who do not know anything, but will
|
|---|
| 372 | * override its effect if the machine doesn't look like a sun3
|
|---|
| 373 | */
|
|---|
| 374 | #if !defined(mc68020) || !defined(sun)
|
|---|
| 375 | #define NO_3_60_CG4
|
|---|
| 376 | #endif
|
|---|
| 377 |
|
|---|
| 378 | /* This is gross. We want to #define u_putbits as something which can be used
|
|---|
| 379 | * in the case of the 3/60+CG4, but if we use /bin/cc or are on another
|
|---|
| 380 | * machine type, we want nothing to do with u_putbits. What a hastle. Here
|
|---|
| 381 | * I used slo_putbits as something which either u_putbits or putbits could be
|
|---|
| 382 | * defined as.
|
|---|
| 383 | *
|
|---|
| 384 | * putbits gets it iff it is not already defined with FASTPUTBITS above.
|
|---|
| 385 | * u_putbits gets it if we have FASTPUTBITS (putbits) from above and have not
|
|---|
| 386 | * overridden the NO_3_60_CG4 flag.
|
|---|
| 387 | */
|
|---|
| 388 |
|
|---|
| 389 | #define slo_putbits(src, x, w, pdst) \
|
|---|
| 390 | { \
|
|---|
| 391 | register int n = (x)+(w)-PPW; \
|
|---|
| 392 | \
|
|---|
| 393 | if (n <= 0) \
|
|---|
| 394 | { \
|
|---|
| 395 | register PixelType tmpmask; \
|
|---|
| 396 | maskpartialbits((x), (w), tmpmask); \
|
|---|
| 397 | *(pdst) = (*(pdst) & ~tmpmask) | \
|
|---|
| 398 | (SCRRIGHT(src, x) & tmpmask); \
|
|---|
| 399 | } \
|
|---|
| 400 | else \
|
|---|
| 401 | { \
|
|---|
| 402 | register int d = PPW-(x); \
|
|---|
| 403 | *(pdst) = (*(pdst) & mfbGetendtab(x)) | (SCRRIGHT((src), x)); \
|
|---|
| 404 | (pdst)[1] = ((pdst)[1] & mfbGetstarttab(n)) | \
|
|---|
| 405 | (SCRLEFT(src, d) & mfbGetendtab(n)); \
|
|---|
| 406 | } \
|
|---|
| 407 | }
|
|---|
| 408 |
|
|---|
| 409 | #if defined(putbits) && !defined(NO_3_60_CG4)
|
|---|
| 410 | #define u_putbits(src, x, w, pdst) slo_putbits(src, x, w, pdst)
|
|---|
| 411 | #else
|
|---|
| 412 | #define u_putbits(src, x, w, pdst) putbits(src, x, w, pdst)
|
|---|
| 413 | #endif
|
|---|
| 414 |
|
|---|
| 415 | #if !defined(putbits)
|
|---|
| 416 | #define putbits(src, x, w, pdst) slo_putbits(src, x, w, pdst)
|
|---|
| 417 | #endif
|
|---|
| 418 |
|
|---|
| 419 | /* Now if we have not gotten any really good bitfield macros, try some
|
|---|
| 420 | * moderately fast macros. Alas, I don't know how to do asm instructions
|
|---|
| 421 | * without gcc.
|
|---|
| 422 | */
|
|---|
| 423 |
|
|---|
| 424 | #ifndef getbits
|
|---|
| 425 | #define getbits(psrc, x, w, dst) \
|
|---|
| 426 | { \
|
|---|
| 427 | dst = SCRLEFT(*(psrc), (x)); \
|
|---|
| 428 | if ( ((x) + (w)) > PPW) \
|
|---|
| 429 | dst |= (SCRRIGHT(*((psrc)+1), PPW-(x))); \
|
|---|
| 430 | }
|
|---|
| 431 | #endif
|
|---|
| 432 |
|
|---|
| 433 | /* We have to special-case putbitsrop because of 3/60+CG4 combos
|
|---|
| 434 | */
|
|---|
| 435 |
|
|---|
| 436 | #define u_putbitsrop(src, x, w, pdst, rop) \
|
|---|
| 437 | {\
|
|---|
| 438 | register PixelType t1, t2; \
|
|---|
| 439 | register int n = (x)+(w)-PPW; \
|
|---|
| 440 | \
|
|---|
| 441 | t1 = SCRRIGHT((src), (x)); \
|
|---|
| 442 | DoRop(t2, rop, t1, *(pdst)); \
|
|---|
| 443 | \
|
|---|
| 444 | if (n <= 0) \
|
|---|
| 445 | { \
|
|---|
| 446 | register PixelType tmpmask; \
|
|---|
| 447 | \
|
|---|
| 448 | maskpartialbits((x), (w), tmpmask); \
|
|---|
| 449 | *(pdst) = (*(pdst) & ~tmpmask) | (t2 & tmpmask); \
|
|---|
| 450 | } \
|
|---|
| 451 | else \
|
|---|
| 452 | { \
|
|---|
| 453 | int m = PPW-(x); \
|
|---|
| 454 | *(pdst) = (*(pdst) & mfbGetendtab(x)) | (t2 & mfbGetstarttab(x)); \
|
|---|
| 455 | t1 = SCRLEFT((src), m); \
|
|---|
| 456 | DoRop(t2, rop, t1, (pdst)[1]); \
|
|---|
| 457 | (pdst)[1] = ((pdst)[1] & mfbGetstarttab(n)) | (t2 & mfbGetendtab(n)); \
|
|---|
| 458 | } \
|
|---|
| 459 | }
|
|---|
| 460 |
|
|---|
| 461 | /* If our getbits and putbits are FAST enough,
|
|---|
| 462 | * do this brute force, it's faster
|
|---|
| 463 | */
|
|---|
| 464 |
|
|---|
| 465 | #if defined(FASTPUTBITS) && defined(FASTGETBITS) && defined(NO_3_60_CG4)
|
|---|
| 466 | #if (BITMAP_BIT_ORDER == MSBFirst)
|
|---|
| 467 | #define putbitsrop(src, x, w, pdst, rop) \
|
|---|
| 468 | { \
|
|---|
| 469 | register PixelType _tmp, _tmp2; \
|
|---|
| 470 | FASTGETBITS(pdst, x, w, _tmp); \
|
|---|
| 471 | _tmp2 = SCRRIGHT(src, PPW-(w)); \
|
|---|
| 472 | DoRop(_tmp, rop, _tmp2, _tmp) \
|
|---|
| 473 | FASTPUTBITS(_tmp, x, w, pdst); \
|
|---|
| 474 | }
|
|---|
| 475 | #define putbitsrrop(src, x, w, pdst, rop) \
|
|---|
| 476 | { \
|
|---|
| 477 | register PixelType _tmp, _tmp2; \
|
|---|
| 478 | \
|
|---|
| 479 | FASTGETBITS(pdst, x, w, _tmp); \
|
|---|
| 480 | _tmp2 = SCRRIGHT(src, PPW-(w)); \
|
|---|
| 481 | _tmp= DoRRop(rop, _tmp2, _tmp); \
|
|---|
| 482 | FASTPUTBITS(_tmp, x, w, pdst); \
|
|---|
| 483 | }
|
|---|
| 484 | #undef u_putbitsrop
|
|---|
| 485 | #else
|
|---|
| 486 | #define putbitsrop(src, x, w, pdst, rop) \
|
|---|
| 487 | { \
|
|---|
| 488 | register PixelType _tmp; \
|
|---|
| 489 | FASTGETBITS(pdst, x, w, _tmp); \
|
|---|
| 490 | DoRop(_tmp, rop, src, _tmp) \
|
|---|
| 491 | FASTPUTBITS(_tmp, x, w, pdst); \
|
|---|
| 492 | }
|
|---|
| 493 | #define putbitsrrop(src, x, w, pdst, rop) \
|
|---|
| 494 | { \
|
|---|
| 495 | register PixelType _tmp; \
|
|---|
| 496 | \
|
|---|
| 497 | FASTGETBITS(pdst, x, w, _tmp); \
|
|---|
| 498 | _tmp= DoRRop(rop, src, _tmp); \
|
|---|
| 499 | FASTPUTBITS(_tmp, x, w, pdst); \
|
|---|
| 500 | }
|
|---|
| 501 | #undef u_putbitsrop
|
|---|
| 502 | #endif
|
|---|
| 503 | #endif
|
|---|
| 504 |
|
|---|
| 505 | #ifndef putbitsrop
|
|---|
| 506 | #define putbitsrop(src, x, w, pdst, rop) u_putbitsrop(src, x, w, pdst, rop)
|
|---|
| 507 | #endif
|
|---|
| 508 |
|
|---|
| 509 | #ifndef putbitsrrop
|
|---|
| 510 | #define putbitsrrop(src, x, w, pdst, rop) \
|
|---|
| 511 | {\
|
|---|
| 512 | register PixelType t1, t2; \
|
|---|
| 513 | register int n = (x)+(w)-PPW; \
|
|---|
| 514 | \
|
|---|
| 515 | t1 = SCRRIGHT((src), (x)); \
|
|---|
| 516 | t2 = DoRRop(rop, t1, *(pdst)); \
|
|---|
| 517 | \
|
|---|
| 518 | if (n <= 0) \
|
|---|
| 519 | { \
|
|---|
| 520 | register PixelType tmpmask; \
|
|---|
| 521 | \
|
|---|
| 522 | maskpartialbits((x), (w), tmpmask); \
|
|---|
| 523 | *(pdst) = (*(pdst) & ~tmpmask) | (t2 & tmpmask); \
|
|---|
| 524 | } \
|
|---|
| 525 | else \
|
|---|
| 526 | { \
|
|---|
| 527 | int m = PPW-(x); \
|
|---|
| 528 | *(pdst) = (*(pdst) & mfbGetendtab(x)) | (t2 & mfbGetstarttab(x)); \
|
|---|
| 529 | t1 = SCRLEFT((src), m); \
|
|---|
| 530 | t2 = DoRRop(rop, t1, (pdst)[1]); \
|
|---|
| 531 | (pdst)[1] = ((pdst)[1] & mfbGetstarttab(n)) | (t2 & mfbGetendtab(n)); \
|
|---|
| 532 | } \
|
|---|
| 533 | }
|
|---|
| 534 | #endif
|
|---|
| 535 |
|
|---|
| 536 | #if GETLEFTBITS_ALIGNMENT == 1
|
|---|
| 537 | #define getleftbits(psrc, w, dst) dst = *((CARD32 *)(pointer) psrc)
|
|---|
| 538 | #endif /* GETLEFTBITS_ALIGNMENT == 1 */
|
|---|
| 539 |
|
|---|
| 540 | #if GETLEFTBITS_ALIGNMENT == 2
|
|---|
| 541 | #define getleftbits(psrc, w, dst) \
|
|---|
| 542 | { \
|
|---|
| 543 | if ( ((int)(psrc)) & 0x01 ) \
|
|---|
| 544 | getbits( ((CARD32 *)(((char *)(psrc))-1)), 8, (w), (dst) ); \
|
|---|
| 545 | else \
|
|---|
| 546 | getbits(psrc, 0, w, dst); \
|
|---|
| 547 | }
|
|---|
| 548 | #endif /* GETLEFTBITS_ALIGNMENT == 2 */
|
|---|
| 549 |
|
|---|
| 550 | #if GETLEFTBITS_ALIGNMENT == 4
|
|---|
| 551 | #define getleftbits(psrc, w, dst) \
|
|---|
| 552 | { \
|
|---|
| 553 | int off, off_b; \
|
|---|
| 554 | off_b = (off = ( ((int)(psrc)) & 0x03)) << 3; \
|
|---|
| 555 | getbits( \
|
|---|
| 556 | (CARD32 *)( ((char *)(psrc)) - off), \
|
|---|
| 557 | (off_b), (w), (dst) \
|
|---|
| 558 | ); \
|
|---|
| 559 | }
|
|---|
| 560 | #endif /* GETLEFTBITS_ALIGNMENT == 4 */
|
|---|
| 561 |
|
|---|
| 562 |
|
|---|
| 563 | #define getshiftedleftbits(psrc, offset, w, dst) \
|
|---|
| 564 | getleftbits((psrc), (w), (dst)); \
|
|---|
| 565 | dst = SCRLEFT((dst), (offset));
|
|---|
| 566 |
|
|---|
| 567 | /* FASTGETBITS and FASTPUTBITS are not necessarily correct implementations of
|
|---|
| 568 | * getbits and putbits, but they work if used together.
|
|---|
| 569 | *
|
|---|
| 570 | * On a MSBFirst machine, a cpu bitfield extract instruction (like bfextu)
|
|---|
| 571 | * could normally assign its result to a 32-bit word register in the screen
|
|---|
| 572 | * right position. This saves canceling register shifts by not fighting the
|
|---|
| 573 | * natural cpu byte order.
|
|---|
| 574 | *
|
|---|
| 575 | * Unfortunately, these fail on a 3/60+CG4 and cannot be used unmodified. Sigh.
|
|---|
| 576 | */
|
|---|
| 577 | #if defined(FASTGETBITS) && defined(FASTPUTBITS)
|
|---|
| 578 | #ifdef NO_3_60_CG4
|
|---|
| 579 | #define u_FASTPUT(aa, bb, cc, dd) FASTPUTBITS(aa, bb, cc, dd)
|
|---|
| 580 | #else
|
|---|
| 581 | #define u_FASTPUT(aa, bb, cc, dd) u_putbits(SCRLEFT(aa, PPW-(cc)), bb, cc, dd)
|
|---|
| 582 | #endif
|
|---|
| 583 |
|
|---|
| 584 | #define getandputbits(psrc, srcbit, dstbit, width, pdst) \
|
|---|
| 585 | { \
|
|---|
| 586 | register PixelType _tmpbits; \
|
|---|
| 587 | FASTGETBITS(psrc, srcbit, width, _tmpbits); \
|
|---|
| 588 | u_FASTPUT(_tmpbits, dstbit, width, pdst); \
|
|---|
| 589 | }
|
|---|
| 590 |
|
|---|
| 591 | #define getandputrop(psrc, srcbit, dstbit, width, pdst, rop) \
|
|---|
| 592 | { \
|
|---|
| 593 | register PixelType _tmpsrc, _tmpdst; \
|
|---|
| 594 | FASTGETBITS(pdst, dstbit, width, _tmpdst); \
|
|---|
| 595 | FASTGETBITS(psrc, srcbit, width, _tmpsrc); \
|
|---|
| 596 | DoRop(_tmpdst, rop, _tmpsrc, _tmpdst); \
|
|---|
| 597 | u_FASTPUT(_tmpdst, dstbit, width, pdst); \
|
|---|
| 598 | }
|
|---|
| 599 |
|
|---|
| 600 | #define getandputrrop(psrc, srcbit, dstbit, width, pdst, rop) \
|
|---|
| 601 | { \
|
|---|
| 602 | register PixelType _tmpsrc, _tmpdst; \
|
|---|
| 603 | FASTGETBITS(pdst, dstbit, width, _tmpdst); \
|
|---|
| 604 | FASTGETBITS(psrc, srcbit, width, _tmpsrc); \
|
|---|
| 605 | _tmpdst = DoRRop(rop, _tmpsrc, _tmpdst); \
|
|---|
| 606 | u_FASTPUT(_tmpdst, dstbit, width, pdst); \
|
|---|
| 607 | }
|
|---|
| 608 |
|
|---|
| 609 | #define getandputbits0(psrc, srcbit, width, pdst) \
|
|---|
| 610 | getandputbits(psrc, srcbit, 0, width, pdst)
|
|---|
| 611 |
|
|---|
| 612 | #define getandputrop0(psrc, srcbit, width, pdst, rop) \
|
|---|
| 613 | getandputrop(psrc, srcbit, 0, width, pdst, rop)
|
|---|
| 614 |
|
|---|
| 615 | #define getandputrrop0(psrc, srcbit, width, pdst, rop) \
|
|---|
| 616 | getandputrrop(psrc, srcbit, 0, width, pdst, rop)
|
|---|
| 617 |
|
|---|
| 618 |
|
|---|
| 619 | #else /* Slow poke */
|
|---|
| 620 |
|
|---|
| 621 | /* pairs of getbits/putbits happen frequently. Some of the code can
|
|---|
| 622 | * be shared or avoided in a few specific instances. It gets us a
|
|---|
| 623 | * small advantage, so we do it. The getandput...0 macros are the only ones
|
|---|
| 624 | * which speed things here. The others are here for compatibility w/the above
|
|---|
| 625 | * FAST ones
|
|---|
| 626 | */
|
|---|
| 627 |
|
|---|
| 628 | #define getandputbits(psrc, srcbit, dstbit, width, pdst) \
|
|---|
| 629 | { \
|
|---|
| 630 | register PixelType _tmpbits; \
|
|---|
| 631 | getbits(psrc, srcbit, width, _tmpbits); \
|
|---|
| 632 | putbits(_tmpbits, dstbit, width, pdst); \
|
|---|
| 633 | }
|
|---|
| 634 |
|
|---|
| 635 | #define getandputrop(psrc, srcbit, dstbit, width, pdst, rop) \
|
|---|
| 636 | { \
|
|---|
| 637 | register PixelType _tmpbits; \
|
|---|
| 638 | getbits(psrc, srcbit, width, _tmpbits) \
|
|---|
| 639 | putbitsrop(_tmpbits, dstbit, width, pdst, rop) \
|
|---|
| 640 | }
|
|---|
| 641 |
|
|---|
| 642 | #define getandputrrop(psrc, srcbit, dstbit, width, pdst, rop) \
|
|---|
| 643 | { \
|
|---|
| 644 | register PixelType _tmpbits; \
|
|---|
| 645 | getbits(psrc, srcbit, width, _tmpbits) \
|
|---|
| 646 | putbitsrrop(_tmpbits, dstbit, width, pdst, rop) \
|
|---|
| 647 | }
|
|---|
| 648 |
|
|---|
| 649 |
|
|---|
| 650 | #define getandputbits0(psrc, sbindex, width, pdst) \
|
|---|
| 651 | { /* unroll the whole damn thing to see how it * behaves */ \
|
|---|
| 652 | register int _flag = PPW - (sbindex); \
|
|---|
| 653 | register PixelType _src; \
|
|---|
| 654 | \
|
|---|
| 655 | _src = SCRLEFT (*(psrc), (sbindex)); \
|
|---|
| 656 | if ((width) > _flag) \
|
|---|
| 657 | _src |= SCRRIGHT (*((psrc) + 1), _flag); \
|
|---|
| 658 | \
|
|---|
| 659 | *(pdst) = (*(pdst) & mfbGetstarttab((width))) | (_src & mfbGetendtab((width))); \
|
|---|
| 660 | }
|
|---|
| 661 |
|
|---|
| 662 |
|
|---|
| 663 | #define getandputrop0(psrc, sbindex, width, pdst, rop) \
|
|---|
| 664 | { \
|
|---|
| 665 | register int _flag = PPW - (sbindex); \
|
|---|
| 666 | register PixelType _src; \
|
|---|
| 667 | \
|
|---|
| 668 | _src = SCRLEFT (*(psrc), (sbindex)); \
|
|---|
| 669 | if ((width) > _flag) \
|
|---|
| 670 | _src |= SCRRIGHT (*((psrc) + 1), _flag); \
|
|---|
| 671 | DoRop(_src, rop, _src, *(pdst)); \
|
|---|
| 672 | \
|
|---|
| 673 | *(pdst) = (*(pdst) & mfbGetstarttab((width))) | (_src & mfbGetendtab((width))); \
|
|---|
| 674 | }
|
|---|
| 675 |
|
|---|
| 676 | #define getandputrrop0(psrc, sbindex, width, pdst, rop) \
|
|---|
| 677 | { \
|
|---|
| 678 | int _flag = PPW - (sbindex); \
|
|---|
| 679 | register PixelType _src; \
|
|---|
| 680 | \
|
|---|
| 681 | _src = SCRLEFT (*(psrc), (sbindex)); \
|
|---|
| 682 | if ((width) > _flag) \
|
|---|
| 683 | _src |= SCRRIGHT (*((psrc) + 1), _flag); \
|
|---|
| 684 | _src = DoRRop(rop, _src, *(pdst)); \
|
|---|
| 685 | \
|
|---|
| 686 | *(pdst) = (*(pdst) & mfbGetstarttab((width))) | (_src & mfbGetendtab((width))); \
|
|---|
| 687 | }
|
|---|
| 688 |
|
|---|
| 689 | #endif /* FASTGETBITS && FASTPUTBITS */
|
|---|
| 690 |
|
|---|
| 691 | #endif /* MFB_CONSTS_ONLY */
|
|---|
