| 1 | /*
|
|---|
| 2 | * Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), [email protected]
|
|---|
| 3 | *
|
|---|
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its
|
|---|
| 5 | * documentation for any purpose is hereby granted without fee, provided that
|
|---|
| 6 | * the above copyright notice appear in all copies and that both that copyright
|
|---|
| 7 | * notice and this permission notice appear in supporting documentation, and
|
|---|
| 8 | * that the name of Marc Aurele La France not be used in advertising or
|
|---|
| 9 | * publicity pertaining to distribution of the software without specific,
|
|---|
| 10 | * written prior permission. Marc Aurele La France makes no representations
|
|---|
| 11 | * about the suitability of this software for any purpose. It is provided
|
|---|
| 12 | * "as-is" without express or implied warranty.
|
|---|
| 13 | *
|
|---|
| 14 | * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|---|
| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
|
|---|
| 16 | * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|---|
| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|---|
| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|---|
| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|---|
| 20 | * PERFORMANCE OF THIS SOFTWARE.
|
|---|
| 21 | */
|
|---|
| 22 |
|
|---|
| 23 |
|
|---|
| 24 | #ifndef __MIBANK_H__
|
|---|
| 25 | #define __MIBANK_H__ 1
|
|---|
| 26 |
|
|---|
| 27 | #include "scrnintstr.h"
|
|---|
| 28 |
|
|---|
| 29 | /*
|
|---|
| 30 | * Banking external interface.
|
|---|
| 31 | */
|
|---|
| 32 |
|
|---|
| 33 | /*
|
|---|
| 34 | * This is the banking function type. The return value is normally zero.
|
|---|
| 35 | * Non-zero returns can be used to implement the likes of scanline interleave,
|
|---|
| 36 | * etc.
|
|---|
| 37 | */
|
|---|
| 38 | typedef int miBankProc(
|
|---|
| 39 | ScreenPtr /*pScreen*/,
|
|---|
| 40 | unsigned int /*iBank*/
|
|---|
| 41 | );
|
|---|
| 42 |
|
|---|
| 43 | typedef miBankProc *miBankProcPtr;
|
|---|
| 44 |
|
|---|
| 45 | typedef struct _miBankInfo
|
|---|
| 46 | {
|
|---|
| 47 | /*
|
|---|
| 48 | * Banking refers to the use of one or more apertures (in the server's
|
|---|
| 49 | * address space) to access various parts of a potentially larger hardware
|
|---|
| 50 | * frame buffer.
|
|---|
| 51 | *
|
|---|
| 52 | * Three different banking schemes are supported:
|
|---|
| 53 | *
|
|---|
| 54 | * Single banking is indicated when pBankA and pBankB are equal and all
|
|---|
| 55 | * three miBankProcPtr's point to the same function. Here, both reads and
|
|---|
| 56 | * writes through the aperture access the same hardware location.
|
|---|
| 57 | *
|
|---|
| 58 | * Shared banking is indicated when pBankA and pBankB are equal but the
|
|---|
| 59 | * source and destination functions differ. Here reads through the
|
|---|
| 60 | * aperture do not necessarily access the same hardware location as writes.
|
|---|
| 61 | *
|
|---|
| 62 | * Double banking is indicated when pBankA and pBankB differ. Here two
|
|---|
| 63 | * independent apertures are used to provide read/write access to
|
|---|
| 64 | * potentially different hardware locations.
|
|---|
| 65 | *
|
|---|
| 66 | * Any other combination will result in no banking.
|
|---|
| 67 | */
|
|---|
| 68 | miBankProcPtr SetSourceBank; /* Set pBankA bank number */
|
|---|
| 69 | miBankProcPtr SetDestinationBank; /* Set pBankB bank number */
|
|---|
| 70 | miBankProcPtr SetSourceAndDestinationBanks; /* Set both bank numbers */
|
|---|
| 71 |
|
|---|
| 72 | pointer pBankA; /* First aperture location */
|
|---|
| 73 | pointer pBankB; /* First or second aperture location */
|
|---|
| 74 |
|
|---|
| 75 | /*
|
|---|
| 76 | * BankSize is in units of sizeof(char) and is the size of each bank.
|
|---|
| 77 | */
|
|---|
| 78 | unsigned long BankSize;
|
|---|
| 79 |
|
|---|
| 80 | /*
|
|---|
| 81 | * nBankDepth is the colour depth associated with the maximum number of a
|
|---|
| 82 | * pixel's bits that are simultaneously accessible through the frame buffer
|
|---|
| 83 | * aperture.
|
|---|
| 84 | */
|
|---|
| 85 | unsigned int nBankDepth;
|
|---|
| 86 | } miBankInfoRec, *miBankInfoPtr;
|
|---|
| 87 |
|
|---|
| 88 | Bool
|
|---|
| 89 | miInitializeBanking(
|
|---|
| 90 | ScreenPtr /*pScreen*/,
|
|---|
| 91 | unsigned int /*xsize*/,
|
|---|
| 92 | unsigned int /*ysize*/,
|
|---|
| 93 | unsigned int /*width*/,
|
|---|
| 94 | miBankInfoPtr /*pBankInfo*/
|
|---|
| 95 | );
|
|---|
| 96 |
|
|---|
| 97 | /*
|
|---|
| 98 | * This function determines the minimum screen width, given a initial estimate
|
|---|
| 99 | * and various screen attributes. DDX needs to determine this width before
|
|---|
| 100 | * initializing the screen.
|
|---|
| 101 | */
|
|---|
| 102 | int
|
|---|
| 103 | miScanLineWidth(
|
|---|
| 104 | unsigned int /*xsize*/,
|
|---|
| 105 | unsigned int /*ysize*/,
|
|---|
| 106 | unsigned int /*width*/,
|
|---|
| 107 | unsigned long /*BankSize*/,
|
|---|
| 108 | PixmapFormatRec * /*pBankFormat*/,
|
|---|
| 109 | unsigned int /*nWidthUnit*/
|
|---|
| 110 | );
|
|---|
| 111 |
|
|---|
| 112 | #endif /* __MIBANK_H__ */
|
|---|
