398 lines
13 KiB
C
398 lines
13 KiB
C
/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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#ifndef SERVERMD_H
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#define SERVERMD_H 1
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/*
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* Machine dependent values:
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* GLYPHPADBYTES should be chosen with consideration for the space-time
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* trade-off. Padding to 0 bytes means that there is no wasted space
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* in the font bitmaps (both on disk and in memory), but that access of
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* the bitmaps will cause odd-address memory references. Padding to
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* 2 bytes would ensure even address memory references and would
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* be suitable for a 68010-class machine, but at the expense of wasted
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* space in the font bitmaps. Padding to 4 bytes would be good
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* for real 32 bit machines, etc. Be sure that you tell the font
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* compiler what kind of padding you want because its defines are
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* kept separate from this. See server/include/font.h for how
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* GLYPHPADBYTES is used.
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*
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* Along with this, you should choose an appropriate value for
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* GETLEFTBITS_ALIGNMENT, which is used in ddx/mfb/maskbits.h. This
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* constant choses what kind of memory references are guarenteed during
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* font access; either 1, 2 or 4, for byte, word or longword access,
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* respectively. For instance, if you have decided to to have
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* GLYPHPADBYTES == 4, then it is pointless for you to have a
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* GETLEFTBITS_ALIGNMENT > 1, because the padding of the fonts has already
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* guarenteed you that your fonts are longword aligned. On the other
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* hand, even if you have chosen GLYPHPADBYTES == 1 to save space, you may
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* also decide that the computing involved in aligning the pointer is more
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* costly than an odd-address access; you choose GETLEFTBITS_ALIGNMENT == 1.
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*
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* Next, choose the tuning parameters which are appropriate for your
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* hardware; these modify the behaviour of the raw frame buffer code
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* in ddx/mfb and ddx/cfb. Defining these incorrectly will not cause
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* the server to run incorrectly, but defining these correctly will
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* cause some noticeable speed improvements:
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*
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* AVOID_MEMORY_READ - (8-bit cfb only)
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* When stippling pixels on the screen (polytext and pushpixels),
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* don't read long words from the display and mask in the
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* appropriate values. Rather, perform multiple byte/short/long
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* writes as appropriate. This option uses many more instructions
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* but runs much faster when the destination is much slower than
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* the CPU and at least 1 level of write buffer is availible (2
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* is much better). Defined currently for SPARC and MIPS.
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*
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* FAST_CONSTANT_OFFSET_MODE - (cfb and mfb)
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* This define is used on machines which have no auto-increment
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* addressing mode, but do have an effectively free constant-offset
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* addressing mode. Currently defined for MIPS and SPARC, even though
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* I remember the cg6 as performing better without it (cg3 definitely
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* performs better with it).
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*
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* LARGE_INSTRUCTION_CACHE -
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* This define increases the number of times some loops are
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* unrolled. On 68020 machines (with 256 bytes of i-cache),
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* this define will slow execution down as instructions miss
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* the cache frequently. On machines with real i-caches, this
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* reduces loop overhead, causing a slight performance improvement.
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* Currently defined for MIPS and SPARC
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*
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* FAST_UNALIGNED_READS -
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* For machines with more memory bandwidth than CPU, this
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* define uses unaligned reads for 8-bit BitBLT instead of doing
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* aligned reads and combining the results with shifts and
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* logical-ors. Currently defined for 68020 and vax.
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* PLENTIFUL_REGISTERS -
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* For machines with > 20 registers. Currently used for
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* unrolling the text painting code a bit more. Currently
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* defined for MIPS.
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* SHARED_IDCACHE -
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* For non-Harvard RISC machines, those which share the same
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* CPU memory bus for instructions and data. This unrolls some
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* solid fill loops which are otherwise best left rolled up.
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* Currently defined for SPARC.
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*/
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#ifdef __arm32__
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#define IMAGE_BYTE_ORDER LSBFirst
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# if defined(XF86MONOVGA) || defined(XF86VGA16) || defined(XF86MONO)
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# define BITMAP_BIT_ORDER MSBFirst
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# else
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# define BITMAP_BIT_ORDER LSBFirst
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# endif
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# if defined(XF86MONOVGA) || defined(XF86VGA16)
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# define BITMAP_SCANLINE_UNIT 8
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# endif
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#define GLYPHPADBYTES 4
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#define GETLEFTBITS_ALIGNMENT 1
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#define LARGE_INSTRUCTION_CACHE
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#define AVOID_MEMORY_READ
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#endif /* __arm32__ */
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#if defined(__powerpc__) || defined(__ppc__)
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#define IMAGE_BYTE_ORDER MSBFirst
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#define BITMAP_BIT_ORDER MSBFirst
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#define GLYPHPADBYTES 4
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#define GETLEFTBITS_ALIGNMENT 1
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/* XXX Should this be for Lynx only? */
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#define LARGE_INSTRUCTION_CACHE
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#define FAST_CONSTANT_OFFSET_MODE
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#define PLENTIFUL_REGISTERS
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#define AVOID_MEMORY_READ
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#define FAST_MEMCPY
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#endif /* PowerPC */
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#if defined(__sh__)
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#if defined(__BIG_ENDIAN__)
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# define IMAGE_BYTE_ORDER MSBFirst
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# define BITMAP_BIT_ORDER MSBFirst
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# define GLYPHPADBYTES 4
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# define GETLEFTBITS_ALIGNMENT 1
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#else
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# define IMAGE_BYTE_ORDER LSBFirst
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# define BITMAP_BIT_ORDER LSBFirst
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# define GLYPHPADBYTES 4
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# define GETLEFTBITS_ALIGNMENT 1
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#endif
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#define AVOID_MEMORY_READ
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#define FAST_CONSTANT_OFFSET_MODE
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#define LARGE_INSTRUCTION_CACHE
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#define PLENTIFUL_REGISTERS
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#endif /* SuperH */
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#if (defined(sun) && (defined(__sparc) || defined(sparc))) || \
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(defined(__uxp__) && (defined(sparc) || defined(mc68000))) || \
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defined(__sparc__) || defined(__mc68000__)
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#if defined(__sparc) || defined(__sparc__)
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# if !defined(sparc)
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# define sparc 1
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# endif
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#endif
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#if defined(sun386) || defined(sun5)
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# define IMAGE_BYTE_ORDER LSBFirst /* Values for the SUN only */
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# define BITMAP_BIT_ORDER LSBFirst
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#else
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# define IMAGE_BYTE_ORDER MSBFirst /* Values for the SUN only */
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# define BITMAP_BIT_ORDER MSBFirst
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#endif
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#ifdef sparc
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# define AVOID_MEMORY_READ
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# define LARGE_INSTRUCTION_CACHE
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# define FAST_CONSTANT_OFFSET_MODE
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# define SHARED_IDCACHE
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#endif
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#ifdef mc68020
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#define FAST_UNALIGNED_READS
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#endif
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#define GLYPHPADBYTES 4
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#define GETLEFTBITS_ALIGNMENT 1
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#endif /* sun */
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#if defined(ibm032) || defined (ibm)
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#ifdef i386
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# define IMAGE_BYTE_ORDER LSBFirst /* Value for PS/2 only */
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#else
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# define IMAGE_BYTE_ORDER MSBFirst /* Values for the RT only*/
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#endif
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#define BITMAP_BIT_ORDER MSBFirst
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#define GLYPHPADBYTES 1
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#define GETLEFTBITS_ALIGNMENT 4
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/* ibm pcc doesn't understand pragmas. */
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#ifdef i386
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#define BITMAP_SCANLINE_UNIT 8
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#endif
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#endif /* ibm */
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#if (defined(mips) || defined(__mips)) && !defined(sgi)
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#if defined(MIPSEL) || defined(__MIPSEL__)
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# define IMAGE_BYTE_ORDER LSBFirst /* Values for the PMAX only */
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# define BITMAP_BIT_ORDER LSBFirst
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# define GLYPHPADBYTES 4
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# define GETLEFTBITS_ALIGNMENT 1
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#else
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# define IMAGE_BYTE_ORDER MSBFirst /* Values for the MIPS only */
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# define BITMAP_BIT_ORDER MSBFirst
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# define GLYPHPADBYTES 4
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# define GETLEFTBITS_ALIGNMENT 1
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#endif
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#define AVOID_MEMORY_READ
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#define FAST_CONSTANT_OFFSET_MODE
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#define LARGE_INSTRUCTION_CACHE
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#define PLENTIFUL_REGISTERS
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#endif /* mips */
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#if defined(__amd64__) || defined(amd64) || defined(__amd64)
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# define IMAGE_BYTE_ORDER LSBFirst
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# if defined(XF86MONOVGA) || defined(XF86VGA16) || defined(XF86MONO)
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# define BITMAP_BIT_ORDER MSBFirst
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# else
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# define BITMAP_BIT_ORDER LSBFirst
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# endif
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# if defined(XF86MONOVGA) || defined(XF86VGA16)
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# define BITMAP_SCANLINE_UNIT 8
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# endif
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# define GLYPHPADBYTES 4
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# define GETLEFTBITS_ALIGNMENT 1
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# define LARGE_INSTRUCTION_CACHE
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# define FAST_CONSTANT_OFFSET_MODE
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/* ???? */
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# define FAST_UNALIGNED_READS
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#endif /* AMD64 */
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#if defined(__alpha__) || defined(__alpha) || \
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defined(__i386__) || defined(__i386) || \
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defined(__UNIXOS2__) || \
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defined(__OS2ELF__) || \
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defined(__QNX__) || \
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defined(__s390x__) || defined(__s390__)
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#ifndef IMAGE_BYTE_ORDER
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#define IMAGE_BYTE_ORDER LSBFirst
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#endif
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#ifndef BITMAP_BIT_ORDER
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# if defined(XF86MONOVGA) || defined(XF86VGA16) || defined(XF86MONO)
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# define BITMAP_BIT_ORDER MSBFirst
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# else
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# define BITMAP_BIT_ORDER LSBFirst
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# endif
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#endif
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#ifndef BITMAP_SCANLINE_UNIT
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# if defined(XF86MONOVGA) || defined(XF86VGA16)
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# define BITMAP_SCANLINE_UNIT 8
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# endif
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#endif
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#ifndef GLYPHPADBYTES
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#define GLYPHPADBYTES 4
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#endif
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#define GETLEFTBITS_ALIGNMENT 1
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#define AVOID_MEMORY_READ
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#endif /* BSD / i386 */
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#if defined (linux) && defined (__mc68000__)
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#define IMAGE_BYTE_ORDER MSBFirst
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#define BITMAP_BIT_ORDER MSBFirst
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#define FAST_UNALIGNED_READS
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#define GLYPHPADBYTES 4
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#define GETLEFTBITS_ALIGNMENT 1
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#endif /* linux/m68k */
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/* linux on the Compaq Itsy */
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#if defined(linux) && defined(__arm__)
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#define IMAGE_BYTE_ORDER LSBFirst
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#define BITMAP_BIT_ORDER LSBFirst
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#define GLYPHPADBYTES 4
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#define GETLEFTBITS_ALIGNMENT 1
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#endif
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/* size of buffer to use with GetImage, measured in bytes. There's obviously
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* a trade-off between the amount of stack (or whatever ALLOCATE_LOCAL gives
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* you) used and the number of times the ddx routine has to be called.
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*/
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#ifndef IMAGE_BUFSIZE
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#define IMAGE_BUFSIZE (64*1024)
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#endif
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/* pad scanline to a longword */
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#ifndef BITMAP_SCANLINE_UNIT
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#define BITMAP_SCANLINE_UNIT 32
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#endif
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#ifndef BITMAP_SCANLINE_PAD
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#define BITMAP_SCANLINE_PAD 32
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#define LOG2_BITMAP_PAD 5
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#define LOG2_BYTES_PER_SCANLINE_PAD 2
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#endif
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/*
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* This returns the number of padding units, for depth d and width w.
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* For bitmaps this can be calculated with the macros above.
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* Other depths require either grovelling over the formats field of the
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* screenInfo or hardwired constants.
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*/
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typedef struct _PaddingInfo {
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int padRoundUp; /* pixels per pad unit - 1 */
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int padPixelsLog2; /* log 2 (pixels per pad unit) */
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int padBytesLog2; /* log 2 (bytes per pad unit) */
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int notPower2; /* bitsPerPixel not a power of 2 */
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int bytesPerPixel; /* only set when notPower2 is TRUE */
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int bitsPerPixel; /* bits per pixel */
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} PaddingInfo;
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extern PaddingInfo PixmapWidthPaddingInfo[];
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/* The only portable way to get the bpp from the depth is to look it up */
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#define BitsPerPixel(d) (PixmapWidthPaddingInfo[d].bitsPerPixel)
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#define PixmapWidthInPadUnits(w, d) \
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(PixmapWidthPaddingInfo[d].notPower2 ? \
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(((int)(w) * PixmapWidthPaddingInfo[d].bytesPerPixel + \
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PixmapWidthPaddingInfo[d].bytesPerPixel) >> \
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PixmapWidthPaddingInfo[d].padBytesLog2) : \
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((int)((w) + PixmapWidthPaddingInfo[d].padRoundUp) >> \
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PixmapWidthPaddingInfo[d].padPixelsLog2))
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/*
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* Return the number of bytes to which a scanline of the given
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* depth and width will be padded.
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*/
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#define PixmapBytePad(w, d) \
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(PixmapWidthInPadUnits(w, d) << PixmapWidthPaddingInfo[d].padBytesLog2)
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#define BitmapBytePad(w) \
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(((int)((w) + BITMAP_SCANLINE_PAD - 1) >> LOG2_BITMAP_PAD) << LOG2_BYTES_PER_SCANLINE_PAD)
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#define PixmapWidthInPadUnitsProto(w, d) PixmapWidthInPadUnits(w, d)
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#define PixmapBytePadProto(w, d) PixmapBytePad(w, d)
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#define BitmapBytePadProto(w) BitmapBytePad(w)
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#endif /* SERVERMD_H */
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