qbit/xenocara
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
0a77d3ef3e
xenocara/xserver/mi/mibank.c

2574 lines
69 KiB
C
Raw Normal View History

Importing xserver from X.Org 7.2RC2
2006-11-26 11:13:41 -07:00
/*
* Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, 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 Marc Aurele La France not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Marc Aurele La France makes no representations
* about the suitability of this software for any purpose. It is provided
* "as-is" without express or implied warranty.
*
* MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
* EVENT SHALL MARC AURELE LA FRANCE 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.
*/
/*
* Copyright 1990,91,92,93 by Thomas Roell, Germany.
* Copyright 1991,92,93 by SGCS (Snitily Graphics Consulting Services), USA.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* 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 Thomas Roell nor
* SGCS be used in advertising or publicity pertaining to distribution
* of the software without specific, written prior permission.
* Thomas Roell nor SGCS makes no representations about the suitability
* of this software for any purpose. It is provided "as is" without
* express or implied warranty.
*
* THOMAS ROELL AND SGCS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THOMAS ROELL OR SGCS 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.
*/
/*
* This thing originated from an idea of Edwin Goei and his bank switching
* code for the DEC TX board.
*/
/*
* Heavily modified for the XFree86 Project to turn this into an mi wrapper.
* --- Marc Aurele La France (tsi@xfree86.org)
*/
/*
* "Heavily modified", indeed! By the time this is finalized, there probably
* won't be much left of Roell's code...
*
* Miscellaneous notes:
* - Pixels with imbedded bank boundaries are required to be off-screen. There
* >might< be a way to fool the underlying framebuffer into dealing with
* partial pixels.
* - Plans to generalise this to do (hardware) colour plane switching have been
* dropped due to colour flashing concerns.
*
* TODO:
* - Allow miModifyBanking() to change BankSize and nBankDepth.
* - Re-instate shared and double banking for framebuffers whose pixmap formats
* don't describe how the server "sees" the screen.
* - Remove remaining assumptions that a pixmap's devPrivate field points
* directly to its pixel data.
*/
/* #define NO_ALLOCA 1 */
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "servermd.h"
#include "gcstruct.h"
#include "pixmapstr.h"
#include "scrnintstr.h"
#include "windowstr.h"
#include "mi.h"
#include "mibank.h"
#define BANK_SINGLE 0
#define BANK_SHARED 1
#define BANK_DOUBLE 2
#define BANK_NOBANK 3
typedef struct _miBankScreen
{
miBankInfoRec BankInfo;
unsigned int nBankBPP;
unsigned int type;
unsigned long nBitsPerBank;
unsigned long nBitsPerScanline;
unsigned long nPixelsPerScanlinePadUnit;
PixmapPtr pScreenPixmap;
PixmapPtr pBankPixmap;
GCPtr pBankGC;
int nBanks, maxRects;
RegionPtr *pBanks;
pointer pbits;
/*
* Screen Wrappers
*/
CreateScreenResourcesProcPtr CreateScreenResources;
ModifyPixmapHeaderProcPtr ModifyPixmapHeader;
CloseScreenProcPtr CloseScreen;
GetImageProcPtr GetImage;
GetSpansProcPtr GetSpans;
CreateGCProcPtr CreateGC;
PaintWindowBackgroundProcPtr PaintWindowBackground;
PaintWindowBorderProcPtr PaintWindowBorder;
CopyWindowProcPtr CopyWindow;
BSFuncRec BackingStoreFuncs;
} miBankScreenRec, *miBankScreenPtr;
typedef struct _miBankGC
{
GCOps *wrappedOps, *unwrappedOps;
GCFuncs *wrappedFuncs, *unwrappedFuncs;
Bool fastCopy, fastPlane;
RegionPtr pBankedClips[1];
} miBankGCRec, *miBankGCPtr;
typedef struct _miBankQueue
{
Bool fastBlit;
unsigned short srcBankNo;
unsigned short dstBankNo;
short x;
short y;
short w;
short h;
} miBankQueue;
/*
* CAVEAT: This banking scheme requires that the DDX store Pixmap data in the
* server's address space.
*/
#define ModifyPixmap(_pPix, _width, _devKind, _pbits) \
(*pScreen->ModifyPixmapHeader)((_pPix), \
(_width), -1, -1, -1, (_devKind), (_pbits))
#define SET_SINGLE_BANK(_pPix, _width, _devKind, _no) \
ModifyPixmap(_pPix, _width, _devKind, \
(char *)pScreenPriv->BankInfo.pBankA + \
(*pScreenPriv->BankInfo.SetSourceAndDestinationBanks)(pScreen, (_no)) - \
(pScreenPriv->BankInfo.BankSize * (_no)))
#define SET_SOURCE_BANK(_pPix, _width, _devKind, _no) \
ModifyPixmap(_pPix, _width, _devKind, \
(char *)pScreenPriv->BankInfo.pBankA + \
(*pScreenPriv->BankInfo.SetSourceBank)(pScreen, (_no)) - \
(pScreenPriv->BankInfo.BankSize * (_no)))
#define SET_DESTINATION_BANK(_pPix, _width, _devKind, _no) \
ModifyPixmap(_pPix, _width, _devKind, \
(char *)pScreenPriv->BankInfo.pBankB + \
(*pScreenPriv->BankInfo.SetDestinationBank)(pScreen, (_no)) - \
(pScreenPriv->BankInfo.BankSize * (_no)))
#define ALLOCATE_LOCAL_ARRAY(atype, ntype) \
(atype *)ALLOCATE_LOCAL((ntype) * sizeof(atype))
static int miBankScreenIndex;
static int miBankGCIndex;
static unsigned long miBankGeneration = 0;
#define BANK_SCRPRIVLVAL pScreen->devPrivates[miBankScreenIndex].ptr
#define BANK_SCRPRIVATE ((miBankScreenPtr)(BANK_SCRPRIVLVAL))
#define BANK_GCPRIVLVAL(pGC) (pGC)->devPrivates[miBankGCIndex].ptr
#define BANK_GCPRIVATE(pGC) ((miBankGCPtr)(BANK_GCPRIVLVAL(pGC)))
#define PIXMAP_STATUS(_pPix) \
pointer pbits = (_pPix)->devPrivate.ptr
#define PIXMAP_SAVE(_pPix) \
PIXMAP_STATUS(_pPix); \
if (pbits == (pointer)pScreenPriv) \
(_pPix)->devPrivate.ptr = pScreenPriv->pbits
#define PIXMAP_RESTORE(_pPix) \
(_pPix)->devPrivate.ptr = pbits
#define BANK_SAVE \
int width = pScreenPriv->pBankPixmap->drawable.width; \
int devKind = pScreenPriv->pBankPixmap->devKind; \
PIXMAP_SAVE(pScreenPriv->pBankPixmap)
#define BANK_RESTORE \
pScreenPriv->pBankPixmap->drawable.width = width; \
pScreenPriv->pBankPixmap->devKind = devKind; \
PIXMAP_RESTORE(pScreenPriv->pBankPixmap)
#define SCREEN_STATUS \
PIXMAP_STATUS(pScreenPriv->pScreenPixmap)
#define SCREEN_SAVE \
PIXMAP_SAVE(pScreenPriv->pScreenPixmap)
#define SCREEN_RESTORE \
PIXMAP_RESTORE(pScreenPriv->pScreenPixmap)
#define SCREEN_INIT \
miBankScreenPtr pScreenPriv = BANK_SCRPRIVATE
#define SCREEN_UNWRAP(field) \
pScreen->field = pScreenPriv->field
#define SCREEN_WRAP(field, wrapper) \
pScreenPriv->field = pScreen->field; \
pScreen->field = wrapper
#define GC_INIT(pGC) \
miBankGCPtr pGCPriv = BANK_GCPRIVATE(pGC)
#define GC_UNWRAP(pGC) \
pGCPriv->unwrappedOps = (pGC)->ops; \
pGCPriv->unwrappedFuncs = (pGC)->funcs; \
(pGC)->ops = pGCPriv->wrappedOps; \
(pGC)->funcs = pGCPriv->wrappedFuncs
#define GC_WRAP(pGC) \
pGCPriv->wrappedOps = (pGC)->ops; \
pGCPriv->wrappedFuncs = (pGC)->funcs; \
(pGC)->ops = pGCPriv->unwrappedOps; \
(pGC)->funcs = pGCPriv->unwrappedFuncs
#define IS_BANKED(pDrawable) \
((pbits == (pointer)pScreenPriv) && \
(((DrawablePtr)(pDrawable))->type == DRAWABLE_WINDOW))
#define CLIP_SAVE \
RegionPtr pOrigCompositeClip = pGC->pCompositeClip
#define CLIP_RESTORE \
pGC->pCompositeClip = pOrigCompositeClip
#define GCOP_INIT \
ScreenPtr pScreen = pGC->pScreen; \
SCREEN_INIT; \
GC_INIT(pGC)
#define GCOP_UNWRAP \
GC_UNWRAP(pGC)
#define GCOP_WRAP \
GC_WRAP(pGC)
#define GCOP_TOP_PART \
for (i = 0; i < pScreenPriv->nBanks; i++) \
{ \
if (!(pGC->pCompositeClip = pGCPriv->pBankedClips[i])) \
continue; \
GCOP_UNWRAP; \
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, i)
#define GCOP_BOTTOM_PART \
GCOP_WRAP; \
}
#define GCOP_SIMPLE(statement) \
if (nArray > 0) \
{ \
GCOP_INIT; \
SCREEN_SAVE; \
if (!IS_BANKED(pDrawable)) \
{ \
GCOP_UNWRAP; \
statement; \
GCOP_WRAP; \
} \
else \
{ \
int i; \
CLIP_SAVE; \
GCOP_TOP_PART; \
statement; \
GCOP_BOTTOM_PART; \
CLIP_RESTORE; \
} \
SCREEN_RESTORE; \
}
#define GCOP_0D_ARGS mode,
#define GCOP_1D_ARGS
#define GCOP_2D_ARGS shape, mode,
#define GCOP_COMPLEX(aop, atype) \
if (nArray > 0) \
{ \
GCOP_INIT; \
SCREEN_SAVE; \
if (!IS_BANKED(pDrawable)) \
{ \
GCOP_UNWRAP; \
(*pGC->ops->aop)(pDrawable, pGC, GCOP_ARGS nArray, pArray); \
GCOP_WRAP; \
} \
else \
{ \
atype *aarg = pArray, *acopy; \
int i; \
CLIP_SAVE; \
if ((acopy = ALLOCATE_LOCAL_ARRAY(atype, nArray))) \
aarg = acopy; \
GCOP_TOP_PART; \
if (acopy) \
memcpy(acopy, pArray, nArray * sizeof(atype)); \
(*pGC->ops->aop)(pDrawable, pGC, GCOP_ARGS nArray, aarg); \
GCOP_BOTTOM_PART; \
DEALLOCATE_LOCAL(acopy); \
CLIP_RESTORE; \
} \
SCREEN_RESTORE; \
}
/*********************
* Utility functions *
*********************/
static int
miBankOf(
miBankScreenPtr pScreenPriv,
int x,
int y
)
{
int iBank = ((x * (int)pScreenPriv->nBankBPP) +
(y * (long)pScreenPriv->nBitsPerScanline)) /
(long)pScreenPriv->nBitsPerBank;
if (iBank < 0)
iBank = 0;
else if (iBank >= pScreenPriv->nBanks)
iBank = pScreenPriv->nBanks - 1;
return iBank;
}
#define FirstBankOf(_x, _y) miBankOf(pScreenPriv, (_x), (_y))
#define LastBankOf(_x, _y) miBankOf(pScreenPriv, (_x) - 1, (_y))
/* Determine banking type from the BankInfoRec */
static unsigned int
miBankDeriveType(
ScreenPtr pScreen,
miBankInfoPtr pBankInfo
)
{
unsigned int type;
if (pBankInfo->pBankA == pBankInfo->pBankB)
{
if (pBankInfo->SetSourceBank == pBankInfo->SetDestinationBank)
{
if (pBankInfo->SetSourceAndDestinationBanks !=
pBankInfo->SetSourceBank)
return BANK_NOBANK;
type = BANK_SINGLE;
}
else
{
if (pBankInfo->SetSourceAndDestinationBanks ==
pBankInfo->SetDestinationBank)
return BANK_NOBANK;
if (pBankInfo->SetSourceAndDestinationBanks ==
pBankInfo->SetSourceBank)
return BANK_NOBANK;
type = BANK_SHARED;
}
}
else
{
if ((unsigned long)abs((char *)pBankInfo->pBankA -
(char *)pBankInfo->pBankB) < pBankInfo->BankSize)
return BANK_NOBANK;
if (pBankInfo->SetSourceBank == pBankInfo->SetDestinationBank)
{
if (pBankInfo->SetSourceAndDestinationBanks !=
pBankInfo->SetSourceBank)
return BANK_NOBANK;
}
else
{
if (pBankInfo->SetSourceAndDestinationBanks ==
pBankInfo->SetDestinationBank)
return BANK_NOBANK;
}
type = BANK_DOUBLE;
}
/*
* Internal limitation: Currently, only single banking is supported when
* the pixmap format and the screen's pixel format are different. The
* following test is only partially successful at detecting this condition.
*/
if (pBankInfo->nBankDepth != pScreen->rootDepth)
type = BANK_SINGLE;
return type;
}
/* Least common multiple */
static unsigned int
miLCM(
unsigned int x,
unsigned int y
)
{
unsigned int m = x, n = y, o;
while ((o = m % n))
{
m = n;
n = o;
}
return (x / n) * y;
}
/******************
* GCOps wrappers *
******************/
static void
miBankFillSpans(
DrawablePtr pDrawable,
GCPtr pGC,
int nArray,
DDXPointPtr pptInit,
int *pwidthInit,
int fSorted
)
{
GCOP_SIMPLE((*pGC->ops->FillSpans)(pDrawable, pGC,
nArray, pptInit, pwidthInit, fSorted));
}
static void
miBankSetSpans(
DrawablePtr pDrawable,
GCPtr pGC,
char *psrc,
DDXPointPtr ppt,
int *pwidth,
int nArray,
int fSorted
)
{
GCOP_SIMPLE((*pGC->ops->SetSpans)(pDrawable, pGC, psrc,
ppt, pwidth, nArray, fSorted));
}
static void
miBankPutImage(
DrawablePtr pDrawable,
GCPtr pGC,
int depth,
int x,
int y,
int w,
int h,
int leftPad,
int format,
char *pImage
)
{
if ((w > 0) && (h > 0))
{
GCOP_INIT;
SCREEN_SAVE;
if (!IS_BANKED(pDrawable))
{
GCOP_UNWRAP;
(*pGC->ops->PutImage)(pDrawable, pGC, depth, x, y, w, h,
leftPad, format, pImage);
GCOP_WRAP;
}
else
{
int i, j;
CLIP_SAVE;
i = FirstBankOf(x + pDrawable->x, y + pDrawable->y);
j = LastBankOf(x + pDrawable->x + w, y + pDrawable->y + h);
for (; i <= j; i++)
{
if (!(pGC->pCompositeClip = pGCPriv->pBankedClips[i]))
continue;
GCOP_UNWRAP;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, i);
(*pGC->ops->PutImage)(pDrawable, pGC, depth, x, y, w, h,
leftPad, format, pImage);
GCOP_WRAP;
}
CLIP_RESTORE;
}
SCREEN_RESTORE;
}
}
/*
* Here the CopyArea/CopyPlane wrappers. First off, we have to clip against
* the source in order to make the minimal number of copies in case of slow
* systems. Also the exposure handling is quite tricky. Special attention
* is to be given to the way the copies are sequenced. The list of boxes after
* the source clip is used to build a workqueue, that contains the atomic
* copies (i.e. only from one bank to one bank). Doing so produces a minimal
* list of things to do.
*/
static RegionPtr
miBankCopy(
DrawablePtr pSrc,
DrawablePtr pDst,
GCPtr pGC,
int srcx,
int srcy,
int w,
int h,
int dstx,
int dsty,
unsigned long plane,
Bool SinglePlane
)
{
int cx1, cy1, cx2, cy2;
int ns, nd, nse, nde, dx, dy, xorg = 0, yorg = 0;
int maxWidth = 0, maxHeight = 0, paddedWidth = 0;
int nBox, nBoxClipSrc, nBoxClipDst, nQueue;
BoxPtr pBox, pBoxClipSrc, pBoxClipDst;
BoxRec fastBox, ccBox;
RegionPtr ret = NULL, prgnSrcClip = NULL;
RegionRec rgnDst;
char *pImage = NULL;
miBankQueue *pQueue, *pQueueNew, *Queue;
miBankQueue *pQueueTmp, *pQueueNext, *pQueueBase;
Bool fastBlit, freeSrcClip, fastClip;
Bool fExpose = FALSE, fastExpose = FALSE;
GCOP_INIT;
SCREEN_SAVE;
if (!IS_BANKED(pSrc) && !IS_BANKED(pDst))
{
GCOP_UNWRAP;
if (SinglePlane)
ret = (*pGC->ops->CopyPlane)(pSrc, pDst, pGC,
srcx, srcy, w, h, dstx, dsty, plane);
else
ret = (*pGC->ops->CopyArea)(pSrc, pDst, pGC,
srcx, srcy, w, h, dstx, dsty);
GCOP_WRAP;
}
else if (!IS_BANKED(pDst))
{
fExpose = pGC->fExpose;
pGC->fExpose = FALSE;
xorg = pSrc->x;
yorg = pSrc->y;
dx = dstx - srcx;
dy = dsty - srcy;
srcx += xorg;
srcy += yorg;
ns = FirstBankOf(srcx, srcy);
nse = LastBankOf(srcx + w, srcy + h);
for (; ns <= nse; ns++)
{
if (!pScreenPriv->pBanks[ns])
continue;
nBox = REGION_NUM_RECTS(pScreenPriv->pBanks[ns]);
pBox = REGION_RECTS(pScreenPriv->pBanks[ns]);
for (; nBox--; pBox++)
{
cx1 = max(pBox->x1, srcx);
cy1 = max(pBox->y1, srcy);
cx2 = min(pBox->x2, srcx + w);
cy2 = min(pBox->y2, srcy + h);
if ((cx1 >= cx2) || (cy1 >= cy2))
continue;
GCOP_UNWRAP;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, ns);
if (SinglePlane)
(*pGC->ops->CopyPlane)(pSrc, pDst, pGC,
cx1 - xorg, cy1 - yorg,
cx2 - cx1, cy2 - cy1,
cx1 + dx - xorg, cy1 + dy - yorg, plane);
else
(*pGC->ops->CopyArea)(pSrc, pDst, pGC,
cx1 - xorg, cy1 - yorg,
cx2 - cx1, cy2 - cy1,
cx1 + dx - xorg, cy1 + dy - yorg);
GCOP_WRAP;
}
}
pGC->fExpose = fExpose;
srcx -= xorg;
srcy -= yorg;
}
else if (!IS_BANKED(pSrc))
{
CLIP_SAVE;
if (pGC->miTranslate)
{
xorg = pDst->x;
yorg = pDst->y;
}
dx = srcx - dstx;
dy = srcy - dsty;
dstx += xorg;
dsty += yorg;
nd = FirstBankOf(dstx, dsty);
nde = LastBankOf(dstx + w, dsty + h);
for (; nd <= nde; nd++)
{
if (!(pGC->pCompositeClip = pGCPriv->pBankedClips[nd]))
continue;
/*
* It's faster to let the lower-level CopyArea do the clipping
* within each bank.
*/
nBox = REGION_NUM_RECTS(pScreenPriv->pBanks[nd]);
pBox = REGION_RECTS(pScreenPriv->pBanks[nd]);
for (; nBox--; pBox++)
{
cx1 = max(pBox->x1, dstx);
cy1 = max(pBox->y1, dsty);
cx2 = min(pBox->x2, dstx + w);
cy2 = min(pBox->y2, dsty + h);
if ((cx1 >= cx2) || (cy1 >= cy2))
continue;
GCOP_UNWRAP;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, nd);
if (SinglePlane)
(*pGC->ops->CopyPlane)(pSrc, pDst, pGC,
cx1 + dx - xorg, cy1 + dy - yorg,
cx2 - cx1, cy2 - cy1,
cx1 - xorg, cy1 - yorg, plane);
else
(*pGC->ops->CopyArea)(pSrc, pDst, pGC,
cx1 + dx - xorg, cy1 + dy - yorg,
cx2 - cx1, cy2 - cy1,
cx1 - xorg, cy1 - yorg);
GCOP_WRAP;
}
}
CLIP_RESTORE;
}
else /* IS_BANKED(pSrc) && IS_BANKED(pDst) */
{
CLIP_SAVE;
fExpose = pGC->fExpose;
fastBox.x1 = srcx + pSrc->x;
fastBox.y1 = srcy + pSrc->y;
fastBox.x2 = fastBox.x1 + w;
fastBox.y2 = fastBox.y1 + h;
dx = dstx - fastBox.x1;
dy = dsty - fastBox.y1;
if (pGC->miTranslate)
{
xorg = pDst->x;
yorg = pDst->y;
}
/*
* Clip against the source. Otherwise we will blit too much for SINGLE
* and SHARED banked systems.
*/
freeSrcClip = FALSE;
fastClip = FALSE;
fastExpose = FALSE;
if (pGC->subWindowMode != IncludeInferiors)
prgnSrcClip = &((WindowPtr)pSrc)->clipList;
else if (!((WindowPtr)pSrc)->parent)
fastClip = TRUE;
else if ((pSrc == pDst) && (pGC->clientClipType == CT_NONE))
prgnSrcClip = pGC->pCompositeClip;
else
{
prgnSrcClip = NotClippedByChildren((WindowPtr)pSrc);
freeSrcClip = TRUE;
}
if (fastClip)
{
fastExpose = TRUE;
/*
* Clip the source. If regions extend beyond the source size, make
* sure exposure events get sent.
*/
if (fastBox.x1 < pSrc->x)
{
fastBox.x1 = pSrc->x;
fastExpose = FALSE;
}
if (fastBox.y1 < pSrc->y)
{
fastBox.y1 = pSrc->y;
fastExpose = FALSE;
}
if (fastBox.x2 > pSrc->x + (int) pSrc->width)
{
fastBox.x2 = pSrc->x + (int) pSrc->width;
fastExpose = FALSE;
}
if (fastBox.y2 > pSrc->y + (int) pSrc->height)
{
fastBox.y2 = pSrc->y + (int) pSrc->height;
fastExpose = FALSE;
}
nBox = 1;
pBox = &fastBox;
}
else
{
REGION_INIT(pScreen, &rgnDst, &fastBox, 1);
REGION_INTERSECT(pScreen, &rgnDst, &rgnDst, prgnSrcClip);
pBox = REGION_RECTS(&rgnDst);
nBox = REGION_NUM_RECTS(&rgnDst);
}
/*
* fastBlit can only be TRUE if we don't need to worry about attempts
* to read partial pixels through the destination bank.
*/
if (SinglePlane)
fastBlit = pGCPriv->fastPlane;
else
fastBlit = pGCPriv->fastCopy;
nQueue = nBox * pScreenPriv->maxRects * 2;
pQueue = Queue = ALLOCATE_LOCAL_ARRAY(miBankQueue, nQueue);
if (Queue)
{
for (; nBox--; pBox++)
{
ns = FirstBankOf(pBox->x1, pBox->y1);
nse = LastBankOf(pBox->x2, pBox->y2);
for (; ns <= nse; ns++)
{
if (!pScreenPriv->pBanks[ns])
continue;
nBoxClipSrc = REGION_NUM_RECTS(pScreenPriv->pBanks[ns]);
pBoxClipSrc = REGION_RECTS(pScreenPriv->pBanks[ns]);
for (; nBoxClipSrc--; pBoxClipSrc++)
{
cx1 = max(pBox->x1, pBoxClipSrc->x1);
cy1 = max(pBox->y1, pBoxClipSrc->y1);
cx2 = min(pBox->x2, pBoxClipSrc->x2);
cy2 = min(pBox->y2, pBoxClipSrc->y2);
/* Check to see if the region is empty */
if ((cx1 >= cx2) || (cy1 >= cy2))
continue;
/* Translate c[xy]* to destination coordinates */
cx1 += dx + xorg;
cy1 += dy + yorg;
cx2 += dx + xorg;
cy2 += dy + yorg;
nd = FirstBankOf(cx1, cy1);
nde = LastBankOf(cx2, cy2);
for (; nd <= nde; nd++)
{
if (!pGCPriv->pBankedClips[nd])
continue;
/*
* Clients can send quite large clip descriptions,
* so use the bank clips here instead.
*/
nBoxClipDst =
REGION_NUM_RECTS(pScreenPriv->pBanks[nd]);
pBoxClipDst =
REGION_RECTS(pScreenPriv->pBanks[nd]);
for (; nBoxClipDst--; pBoxClipDst++)
{
ccBox.x1 = max(cx1, pBoxClipDst->x1);
ccBox.y1 = max(cy1, pBoxClipDst->y1);
ccBox.x2 = min(cx2, pBoxClipDst->x2);
ccBox.y2 = min(cy2, pBoxClipDst->y2);
/* Check to see if the region is empty */
if ((ccBox.x1 >= ccBox.x2) ||
(ccBox.y1 >= ccBox.y2))
continue;
pQueue->srcBankNo = ns;
pQueue->dstBankNo = nd;
pQueue->x = ccBox.x1 - xorg;
pQueue->y = ccBox.y1 - yorg;
pQueue->w = ccBox.x2 - ccBox.x1;
pQueue->h = ccBox.y2 - ccBox.y1;
if (maxWidth < pQueue->w)
maxWidth = pQueue->w;
if (maxHeight < pQueue->h)
maxHeight = pQueue->h;
/*
* When shared banking is used and the source
* and destination banks differ, prevent
* attempts to fetch partial scanline pad units
* through the destination bank.
*/
pQueue->fastBlit = fastBlit;
if (fastBlit &&
(pScreenPriv->type == BANK_SHARED) &&
(ns != nd) &&
((ccBox.x1 %
pScreenPriv->nPixelsPerScanlinePadUnit) ||
(ccBox.x2 %
pScreenPriv->nPixelsPerScanlinePadUnit) ||
(RECT_IN_REGION(pScreen,
pGCPriv->pBankedClips[nd], &ccBox) !=
rgnIN)))
pQueue->fastBlit = FALSE;
pQueue++;
}
}
}
}
}
}
if (!fastClip)
{
REGION_UNINIT(pScreen, &rgnDst);
if (freeSrcClip)
REGION_DESTROY(pScreen, prgnSrcClip);
}
pQueueNew = pQueue;
nQueue = pQueue - Queue;
if (nQueue > 0)
{
BANK_SAVE;
pQueue = Queue;
if ((nQueue > 1) &&
((pSrc == pDst) || (pGC->subWindowMode == IncludeInferiors)))
{
if ((srcy + pSrc->y) < (dsty + yorg))
{
/* Sort from bottom to top */
pQueueBase = pQueueNext = pQueue + nQueue - 1;
while (pQueueBase >= pQueue)
{
while ((pQueueNext >= pQueue) &&
(pQueueBase->y == pQueueNext->y))
pQueueNext--;
pQueueTmp = pQueueNext + 1;
while (pQueueTmp <= pQueueBase)
*pQueueNew++ = *pQueueTmp++;
pQueueBase = pQueueNext;
}
pQueueNew -= nQueue;
pQueue = pQueueNew;
pQueueNew = Queue;
}
if ((srcx + pSrc->x) < (dstx + xorg))
{
/* Sort from right to left */
pQueueBase = pQueueNext = pQueue;
while (pQueueBase < pQueue + nQueue)
{
while ((pQueueNext < pQueue + nQueue) &&
(pQueueNext->y == pQueueBase->y))
pQueueNext++;
pQueueTmp = pQueueNext;
while (pQueueTmp != pQueueBase)
*pQueueNew++ = *--pQueueTmp;
pQueueBase = pQueueNext;
}
pQueueNew -= nQueue;
pQueue = pQueueNew;
}
}
paddedWidth = PixmapBytePad(maxWidth,
pScreenPriv->pScreenPixmap->drawable.depth);
pImage = (char *)ALLOCATE_LOCAL(paddedWidth * maxHeight);
pGC->fExpose = FALSE;
while (nQueue--)
{
pGC->pCompositeClip = pGCPriv->pBankedClips[pQueue->dstBankNo];
GCOP_UNWRAP;
if (pQueue->srcBankNo == pQueue->dstBankNo)
{
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap,
-1, -1, pQueue->srcBankNo);
if (SinglePlane)
(*pGC->ops->CopyPlane)(pSrc, pDst, pGC,
pQueue->x - dx - pSrc->x, pQueue->y - dy - pSrc->y,
pQueue->w, pQueue->h, pQueue->x, pQueue->y, plane);
else
(*pGC->ops->CopyArea)(pSrc, pDst, pGC,
pQueue->x - dx - pSrc->x, pQueue->y - dy - pSrc->y,
pQueue->w, pQueue->h, pQueue->x, pQueue->y);
}
else if (pQueue->fastBlit)
{
SET_SOURCE_BANK (pScreenPriv->pBankPixmap,
pScreenPriv->pScreenPixmap->drawable.width,
pScreenPriv->pScreenPixmap->devKind,
pQueue->srcBankNo);
SET_DESTINATION_BANK(pScreenPriv->pScreenPixmap,
-1, -1, pQueue->dstBankNo);
if (SinglePlane)
(*pGC->ops->CopyPlane)(
(DrawablePtr)pScreenPriv->pBankPixmap, pDst, pGC,
pQueue->x - dx, pQueue->y - dy,
pQueue->w, pQueue->h, pQueue->x, pQueue->y, plane);
else
(*pGC->ops->CopyArea)(
(DrawablePtr)pScreenPriv->pBankPixmap, pDst, pGC,
pQueue->x - dx, pQueue->y - dy,
pQueue->w, pQueue->h, pQueue->x, pQueue->y);
}
else if (pImage)
{
ModifyPixmap(pScreenPriv->pBankPixmap,
maxWidth, paddedWidth, pImage);
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap,
-1, -1, pQueue->srcBankNo);
(*pScreenPriv->pBankGC->ops->CopyArea)(
pSrc, (DrawablePtr)pScreenPriv->pBankPixmap,
pScreenPriv->pBankGC,
pQueue->x - dx - pSrc->x, pQueue->y - dy - pSrc->y,
pQueue->w, pQueue->h, 0, 0);
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap,
-1, -1, pQueue->dstBankNo);
if (SinglePlane)
(*pGC->ops->CopyPlane)(
(DrawablePtr)pScreenPriv->pBankPixmap,
pDst, pGC, 0, 0, pQueue->w, pQueue->h,
pQueue->x, pQueue->y, plane);
else
(*pGC->ops->CopyArea)(
(DrawablePtr)pScreenPriv->pBankPixmap,
pDst, pGC, 0, 0, pQueue->w, pQueue->h,
pQueue->x, pQueue->y);
}
GCOP_WRAP;
pQueue++;
}
DEALLOCATE_LOCAL(pImage);
BANK_RESTORE;
}
CLIP_RESTORE;
pGC->fExpose = fExpose;
DEALLOCATE_LOCAL(Queue);
}
SCREEN_RESTORE;
if (!fExpose || fastExpose)
return ret;
return miHandleExposures(pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty, 0);
}
static RegionPtr
miBankCopyArea(
DrawablePtr pSrc,
DrawablePtr pDst,
GCPtr pGC,
int srcx,
int srcy,
int w,
int h,
int dstx,
int dsty
)
{
return miBankCopy(pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty, 0, FALSE);
}
static RegionPtr
miBankCopyPlane(
DrawablePtr pSrc,
DrawablePtr pDst,
GCPtr pGC,
int srcx,
int srcy,
int w,
int h,
int dstx,
int dsty,
unsigned long plane
)
{
return
miBankCopy(pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty, plane, TRUE);
}
static void
miBankPolyPoint(
DrawablePtr pDrawable,
GCPtr pGC,
int mode,
int nArray,
xPoint *pArray
)
{
# define GCOP_ARGS GCOP_0D_ARGS
GCOP_COMPLEX(PolyPoint, xPoint);
# undef GCOP_ARGS
}
static void
miBankPolylines(
DrawablePtr pDrawable,
GCPtr pGC,
int mode,
int nArray,
DDXPointPtr pArray
)
{
# define GCOP_ARGS GCOP_0D_ARGS
GCOP_COMPLEX(Polylines, DDXPointRec);
# undef GCOP_ARGS
}
static void
miBankPolySegment(
DrawablePtr pDrawable,
GCPtr pGC,
int nArray,
xSegment *pArray
)
{
# define GCOP_ARGS GCOP_1D_ARGS
GCOP_COMPLEX(PolySegment, xSegment);
# undef GCOP_ARGS
}
static void
miBankPolyRectangle(
DrawablePtr pDrawable,
GCPtr pGC,
int nArray,
xRectangle *pArray
)
{
# define GCOP_ARGS GCOP_1D_ARGS
GCOP_COMPLEX(PolyRectangle, xRectangle);
# undef GCOP_ARGS
}
static void
miBankPolyArc(
DrawablePtr pDrawable,
GCPtr pGC,
int nArray,
xArc *pArray
)
{
# define GCOP_ARGS GCOP_1D_ARGS
GCOP_COMPLEX(PolyArc, xArc);
# undef GCOP_ARGS
}
static void
miBankFillPolygon(
DrawablePtr pDrawable,
GCPtr pGC,
int shape,
int mode,
int nArray,
DDXPointRec *pArray
)
{
# define GCOP_ARGS GCOP_2D_ARGS
GCOP_COMPLEX(FillPolygon, DDXPointRec);
# undef GCOP_ARGS
}
static void
miBankPolyFillRect(
DrawablePtr pDrawable,
GCPtr pGC,
int nArray,
xRectangle *pArray
)
{
# define GCOP_ARGS GCOP_1D_ARGS
GCOP_COMPLEX(PolyFillRect, xRectangle);
# undef GCOP_ARGS
}
static void
miBankPolyFillArc(
DrawablePtr pDrawable,
GCPtr pGC,
int nArray,
xArc *pArray
)
{
# define GCOP_ARGS GCOP_1D_ARGS
GCOP_COMPLEX(PolyFillArc, xArc);
# undef GCOP_ARGS
}
static int
miBankPolyText8(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
int nArray,
char *pchar
)
{
int retval = x;
GCOP_SIMPLE(retval =
(*pGC->ops->PolyText8)(pDrawable, pGC, x, y, nArray, pchar));
return retval;
}
static int
miBankPolyText16(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
int nArray,
unsigned short *pchar
)
{
int retval = x;
GCOP_SIMPLE(retval =
(*pGC->ops->PolyText16)(pDrawable, pGC, x, y, nArray, pchar));
return retval;
}
static void
miBankImageText8(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
int nArray,
char *pchar
)
{
GCOP_SIMPLE((*pGC->ops->ImageText8)(pDrawable, pGC, x, y, nArray, pchar));
}
static void
miBankImageText16(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
int nArray,
unsigned short *pchar
)
{
GCOP_SIMPLE((*pGC->ops->ImageText16)(pDrawable, pGC, x, y, nArray, pchar));
}
static void
miBankImageGlyphBlt(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
unsigned int nArray,
CharInfoPtr *ppci,
pointer pglyphBase
)
{
GCOP_SIMPLE((*pGC->ops->ImageGlyphBlt)(pDrawable, pGC,
x, y, nArray, ppci, pglyphBase));
}
static void
miBankPolyGlyphBlt(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
unsigned int nArray,
CharInfoPtr *ppci,
pointer pglyphBase
)
{
GCOP_SIMPLE((*pGC->ops->PolyGlyphBlt)(pDrawable, pGC,
x, y, nArray, ppci, pglyphBase));
}
static void
miBankPushPixels(
GCPtr pGC,
PixmapPtr pBitmap,
DrawablePtr pDrawable,
int w,
int h,
int x,
int y
)
{
if ((w > 0) && (h > 0))
{
GCOP_INIT;
SCREEN_SAVE;
if (!IS_BANKED(pDrawable))
{
GCOP_UNWRAP;
(*pGC->ops->PushPixels)(pGC, pBitmap, pDrawable, w, h, x, y);
GCOP_WRAP;
}
else
{
int i, j;
CLIP_SAVE;
i = FirstBankOf(x, y);
j = LastBankOf(x + w, y + h);
for (; i <= j; i++)
{
if (!(pGC->pCompositeClip = pGCPriv->pBankedClips[i]))
continue;
GCOP_UNWRAP;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, i);
(*pGC->ops->PushPixels)(pGC, pBitmap, pDrawable, w, h, x, y);
GCOP_WRAP;
}
CLIP_RESTORE;
}
SCREEN_RESTORE;
}
}
static GCOps miBankGCOps =
{
miBankFillSpans,
miBankSetSpans,
miBankPutImage,
miBankCopyArea,
miBankCopyPlane,
miBankPolyPoint,
miBankPolylines,
miBankPolySegment,
miBankPolyRectangle,
miBankPolyArc,
miBankFillPolygon,
miBankPolyFillRect,
miBankPolyFillArc,
miBankPolyText8,
miBankPolyText16,
miBankImageText8,
miBankImageText16,
miBankImageGlyphBlt,
miBankPolyGlyphBlt,
miBankPushPixels,
{NULL} /* devPrivate */
};
/********************
* GCFuncs wrappers *
********************/
static void
miBankValidateGC(
GCPtr pGC,
unsigned long changes,
DrawablePtr pDrawable
)
{
GC_INIT(pGC);
GC_UNWRAP(pGC);
(*pGC->funcs->ValidateGC)(pGC, changes, pDrawable);
if ((changes & (GCClipXOrigin|GCClipYOrigin|GCClipMask|GCSubwindowMode)) ||
(pDrawable->serialNumber != (pGC->serialNumber & DRAWABLE_SERIAL_BITS)))
{
ScreenPtr pScreen = pGC->pScreen;
RegionPtr prgnClip;
unsigned long planemask;
int i;
SCREEN_INIT;
SCREEN_SAVE;
if (IS_BANKED(pDrawable))
{
for (i = 0; i < pScreenPriv->nBanks; i++)
{
if (!pScreenPriv->pBanks[i])
continue;
if (!(prgnClip = pGCPriv->pBankedClips[i]))
prgnClip = REGION_CREATE(pScreen, NULL, 1);
REGION_INTERSECT(pScreen, prgnClip,
pScreenPriv->pBanks[i], pGC->pCompositeClip);
if ((REGION_NUM_RECTS(prgnClip) <= 1) &&
((prgnClip->extents.x1 == prgnClip->extents.x2) ||
(prgnClip->extents.y1 == prgnClip->extents.y2)))
{
REGION_DESTROY(pScreen, prgnClip);
pGCPriv->pBankedClips[i] = NULL;
}
else
pGCPriv->pBankedClips[i] = prgnClip;
}
/*
* fastCopy and fastPlane can only be TRUE if we don't need to
* worry about attempts to read partial pixels through the
* destination bank.
*/
switch (pScreenPriv->type)
{
case BANK_SHARED:
pGCPriv->fastCopy = pGCPriv->fastPlane = FALSE;
if ((pGC->alu != GXclear) && (pGC->alu != GXcopy) &&
(pGC->alu != GXcopyInverted) && (pGC->alu != GXset))
break;
if (pScreen->rootDepth == 1)
pGCPriv->fastPlane = TRUE;
/* This is probably paranoia */
if ((pDrawable->depth != pScreen->rootDepth) ||
(pDrawable->depth != pGC->depth))
break;
planemask = (1 << pGC->depth) - 1;
if ((pGC->planemask & planemask) == planemask)
pGCPriv->fastCopy = TRUE;
break;
case BANK_DOUBLE:
pGCPriv->fastCopy = pGCPriv->fastPlane = TRUE;
break;
default:
pGCPriv->fastCopy = pGCPriv->fastPlane = FALSE;
break;
}
}
else
{
/*
* Here we are on a pixmap and don't need all that special clipping
* stuff, hence free it.
*/
for (i = 0; i < pScreenPriv->nBanks; i++)
{
if (!pGCPriv->pBankedClips[i])
continue;
REGION_DESTROY(pScreen, pGCPriv->pBankedClips[i]);
pGCPriv->pBankedClips[i] = NULL;
}
}
SCREEN_RESTORE;
}
GC_WRAP(pGC);
}
static void
miBankChangeGC(
GCPtr pGC,
unsigned long mask
)
{
GC_INIT(pGC);
GC_UNWRAP(pGC);
(*pGC->funcs->ChangeGC)(pGC, mask);
GC_WRAP(pGC);
}
static void
miBankCopyGC(
GCPtr pGCSrc,
unsigned long mask,
GCPtr pGCDst
)
{
GC_INIT(pGCDst);
GC_UNWRAP(pGCDst);
(*pGCDst->funcs->CopyGC)(pGCSrc, mask, pGCDst);
GC_WRAP(pGCDst);
}
static void
miBankDestroyGC(
GCPtr pGC
)
{
ScreenPtr pScreen = pGC->pScreen;
int i;
SCREEN_INIT;
GC_INIT(pGC);
GC_UNWRAP(pGC);
(*pGC->funcs->DestroyGC)(pGC);
for (i = 0; i < pScreenPriv->nBanks; i++)
{
if (!pGCPriv->pBankedClips[i])
continue;
REGION_DESTROY(pScreen, pGCPriv->pBankedClips[i]);
pGCPriv->pBankedClips[i] = NULL;
}
GC_WRAP(pGC);
}
static void
miBankChangeClip(
GCPtr pGC,
int type,
pointer pvalue,
int nrects
)
{
GC_INIT(pGC);
GC_UNWRAP(pGC);
(*pGC->funcs->ChangeClip)(pGC, type, pvalue, nrects);
GC_WRAP(pGC);
}
static void
miBankDestroyClip(
GCPtr pGC
)
{
GC_INIT(pGC);
GC_UNWRAP(pGC);
(*pGC->funcs->DestroyClip)(pGC);
GC_WRAP(pGC);
}
static void
miBankCopyClip(
GCPtr pGCDst,
GCPtr pGCSrc
)
{
GC_INIT(pGCDst);
GC_UNWRAP(pGCDst);
(*pGCDst->funcs->CopyClip)(pGCDst, pGCSrc);
GC_WRAP(pGCDst);
}
static GCFuncs miBankGCFuncs =
{
miBankValidateGC,
miBankChangeGC,
miBankCopyGC,
miBankDestroyGC,
miBankChangeClip,
miBankDestroyClip,
miBankCopyClip
};
/*******************
* Screen Wrappers *
*******************/
static Bool
miBankCreateScreenResources(
ScreenPtr pScreen
)
{
Bool retval;
SCREEN_INIT;
SCREEN_UNWRAP(CreateScreenResources);
if ((retval = (*pScreen->CreateScreenResources)(pScreen)))
{
/* Set screen buffer address to something recognizable */
pScreenPriv->pScreenPixmap = (*pScreen->GetScreenPixmap)(pScreen);
pScreenPriv->pbits = pScreenPriv->pScreenPixmap->devPrivate.ptr;
pScreenPriv->pScreenPixmap->devPrivate.ptr = (pointer)pScreenPriv;
/* Get shadow pixmap; width & height of 0 means no pixmap data */
pScreenPriv->pBankPixmap = (*pScreen->CreatePixmap)(pScreen, 0, 0,
pScreenPriv->pScreenPixmap->drawable.depth);
if (!pScreenPriv->pBankPixmap)
retval = FALSE;
}
/* Shadow the screen */
if (retval)
retval = (*pScreen->ModifyPixmapHeader)(pScreenPriv->pBankPixmap,
pScreenPriv->pScreenPixmap->drawable.width,
pScreenPriv->pScreenPixmap->drawable.height,
pScreenPriv->pScreenPixmap->drawable.depth,
pScreenPriv->pScreenPixmap->drawable.bitsPerPixel,
pScreenPriv->pScreenPixmap->devKind, NULL);
/* Create shadow GC */
if (retval)
{
pScreenPriv->pBankGC = CreateScratchGC(pScreen,
pScreenPriv->pBankPixmap->drawable.depth);
if (!pScreenPriv->pBankGC)
retval = FALSE;
}
/* Validate shadow GC */
if (retval)
{
pScreenPriv->pBankGC->graphicsExposures = FALSE;
pScreenPriv->pBankGC->subWindowMode = IncludeInferiors;
ValidateGC((DrawablePtr)pScreenPriv->pBankPixmap,
pScreenPriv->pBankGC);
}
SCREEN_WRAP(CreateScreenResources, miBankCreateScreenResources);
return retval;
}
static Bool
miBankModifyPixmapHeader(
PixmapPtr pPixmap,
int width,
int height,
int depth,
int bitsPerPixel,
int devKind,
pointer pPixData
)
{
Bool retval = FALSE;
if (pPixmap)
{
ScreenPtr pScreen = pPixmap->drawable.pScreen;
SCREEN_INIT;
PIXMAP_SAVE(pPixmap);
SCREEN_UNWRAP(ModifyPixmapHeader);
retval = (*pScreen->ModifyPixmapHeader)(pPixmap, width, height,
depth, bitsPerPixel, devKind, pPixData);
SCREEN_WRAP(ModifyPixmapHeader, miBankModifyPixmapHeader);
if (pbits == (pointer)pScreenPriv)
{
pScreenPriv->pbits = pPixmap->devPrivate.ptr;
pPixmap->devPrivate.ptr = pbits;
}
}
return retval;
}
static Bool
miBankCloseScreen(
int nIndex,
ScreenPtr pScreen
)
{
int i;
SCREEN_INIT;
/* Free shadow GC */
FreeScratchGC(pScreenPriv->pBankGC);
/* Free shadow pixmap */
(*pScreen->DestroyPixmap)(pScreenPriv->pBankPixmap);
/* Restore screen pixmap devPrivate pointer */
pScreenPriv->pScreenPixmap->devPrivate.ptr = pScreenPriv->pbits;
/* Delete bank clips */
for (i = 0; i < pScreenPriv->nBanks; i++)
if (pScreenPriv->pBanks[i])
REGION_DESTROY(pScreen, pScreenPriv->pBanks[i]);
Xfree(pScreenPriv->pBanks);
SCREEN_UNWRAP(CreateScreenResources);
SCREEN_UNWRAP(ModifyPixmapHeader);
SCREEN_UNWRAP(CloseScreen);
SCREEN_UNWRAP(GetImage);
SCREEN_UNWRAP(GetSpans);
SCREEN_UNWRAP(CreateGC);
SCREEN_UNWRAP(PaintWindowBackground);
SCREEN_UNWRAP(PaintWindowBorder);
SCREEN_UNWRAP(CopyWindow);
SCREEN_UNWRAP(BackingStoreFuncs);
Xfree(pScreenPriv);
return (*pScreen->CloseScreen)(nIndex, pScreen);
}
static void
miBankGetImage(
DrawablePtr pDrawable,
int sx,
int sy,
int w,
int h,
unsigned int format,
unsigned long planemask,
char *pImage
)
{
if ((w > 0) && (h > 0))
{
ScreenPtr pScreen = pDrawable->pScreen;
SCREEN_INIT;
SCREEN_STATUS;
SCREEN_UNWRAP(GetImage);
if (!IS_BANKED(pDrawable))
{
(*pScreen->GetImage)(pDrawable, sx, sy, w, h,
format, planemask, pImage);
}
else
{
int paddedWidth;
char *pBankImage;
paddedWidth = PixmapBytePad(w,
pScreenPriv->pScreenPixmap->drawable.depth);
pBankImage = (char *)ALLOCATE_LOCAL(paddedWidth * h);
if (pBankImage)
{
BANK_SAVE;
ModifyPixmap(pScreenPriv->pBankPixmap, w, paddedWidth,
pBankImage);
(*pScreenPriv->pBankGC->ops->CopyArea)(
(DrawablePtr)WindowTable[pScreen->myNum],
(DrawablePtr)pScreenPriv->pBankPixmap,
pScreenPriv->pBankGC,
sx + pDrawable->x, sy + pDrawable->y, w, h, 0, 0);
(*pScreen->GetImage)((DrawablePtr)pScreenPriv->pBankPixmap,
0, 0, w, h, format, planemask, pImage);
BANK_RESTORE;
DEALLOCATE_LOCAL(pBankImage);
}
}
SCREEN_WRAP(GetImage, miBankGetImage);
}
}
static void
miBankGetSpans(
DrawablePtr pDrawable,
int wMax,
DDXPointPtr ppt,
int *pwidth,
int nspans,
char *pImage
)
{
if (nspans > 0)
{
ScreenPtr pScreen = pDrawable->pScreen;
SCREEN_INIT;
SCREEN_STATUS;
SCREEN_UNWRAP(GetSpans);
if (!IS_BANKED(pDrawable))
{
(*pScreen->GetSpans)(pDrawable, wMax, ppt, pwidth, nspans, pImage);
}
else
{
char *pBankImage;
int paddedWidth;
DDXPointRec pt;
pt.x = pt.y = 0;
paddedWidth =
PixmapBytePad(pScreenPriv->pScreenPixmap->drawable.width,
pScreenPriv->pScreenPixmap->drawable.depth);
pBankImage = (char *)ALLOCATE_LOCAL(paddedWidth);
if (pBankImage)
{
BANK_SAVE;
ModifyPixmap(pScreenPriv->pBankPixmap,
pScreenPriv->pScreenPixmap->drawable.width,
paddedWidth, pBankImage);
for (; nspans--; ppt++, pwidth++)
{
if (*pwidth <= 0)
continue;
(*pScreenPriv->pBankGC->ops->CopyArea)(
(DrawablePtr)WindowTable[pScreen->myNum],
(DrawablePtr)pScreenPriv->pBankPixmap,
pScreenPriv->pBankGC,
ppt->x, ppt->y, *pwidth, 1, 0, 0);
(*pScreen->GetSpans)((DrawablePtr)pScreenPriv->pBankPixmap,
wMax, &pt, pwidth, 1, pImage);
pImage = pImage + PixmapBytePad(*pwidth, pDrawable->depth);
}
BANK_RESTORE;
DEALLOCATE_LOCAL(pBankImage);
}
}
SCREEN_WRAP(GetSpans, miBankGetSpans);
}
}
static Bool
miBankCreateGC(
GCPtr pGC
)
{
ScreenPtr pScreen = pGC->pScreen;
miBankGCPtr pGCPriv = BANK_GCPRIVATE(pGC);
Bool ret;
SCREEN_INIT;
SCREEN_UNWRAP(CreateGC);
if ((ret = (*pScreen->CreateGC)(pGC)))
{
pGCPriv->unwrappedOps = &miBankGCOps;
pGCPriv->unwrappedFuncs = &miBankGCFuncs;
GC_WRAP(pGC);
memset(&pGCPriv->pBankedClips, 0,
pScreenPriv->nBanks * sizeof(pGCPriv->pBankedClips));
}
SCREEN_WRAP(CreateGC, miBankCreateGC);
return ret;
}
static void
miBankPaintWindow(
WindowPtr pWin,
RegionPtr pRegion,
int what
)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
RegionRec tmpReg;
int i;
PaintWindowProcPtr PaintWindow;
SCREEN_INIT;
SCREEN_SAVE;
if (what == PW_BORDER)
{
SCREEN_UNWRAP(PaintWindowBorder);
PaintWindow = pScreen->PaintWindowBorder;
}
else
{
SCREEN_UNWRAP(PaintWindowBackground);
PaintWindow = pScreen->PaintWindowBackground;
}
if (!IS_BANKED(pWin))
{
(*PaintWindow)(pWin, pRegion, what);
}
else
{
REGION_NULL(pScreen, &tmpReg);
for (i = 0; i < pScreenPriv->nBanks; i++)
{
if (!pScreenPriv->pBanks[i])
continue;
REGION_INTERSECT(pScreen, &tmpReg, pRegion,
pScreenPriv->pBanks[i]);
if (REGION_NIL(&tmpReg))
continue;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, i);
(*PaintWindow)(pWin, &tmpReg, what);
}
REGION_UNINIT(pScreen, &tmpReg);
}
if (what == PW_BORDER)
{
SCREEN_WRAP(PaintWindowBorder, miBankPaintWindow);
}
else
{
SCREEN_WRAP(PaintWindowBackground, miBankPaintWindow);
}
SCREEN_RESTORE;
}
static void
miBankCopyWindow(
WindowPtr pWindow,
DDXPointRec ptOldOrg,
RegionPtr pRgnSrc
)
{
ScreenPtr pScreen = pWindow->drawable.pScreen;
GCPtr pGC;
int dx, dy, nBox;
DrawablePtr pDrawable = (DrawablePtr)WindowTable[pScreen->myNum];
RegionPtr pRgnDst;
BoxPtr pBox, pBoxTmp, pBoxNext, pBoxBase, pBoxNew1, pBoxNew2;
XID subWindowMode = IncludeInferiors;
pGC = GetScratchGC(pDrawable->depth, pScreen);
ChangeGC(pGC, GCSubwindowMode, &subWindowMode);
ValidateGC(pDrawable, pGC);
pRgnDst = REGION_CREATE(pScreen, NULL, 1);
dx = ptOldOrg.x - pWindow->drawable.x;
dy = ptOldOrg.y - pWindow->drawable.y;
REGION_TRANSLATE(pScreen, pRgnSrc, -dx, -dy);
REGION_INTERSECT(pScreen, pRgnDst, &pWindow->borderClip, pRgnSrc);
pBox = REGION_RECTS(pRgnDst);
nBox = REGION_NUM_RECTS(pRgnDst);
pBoxNew1 = NULL;
pBoxNew2 = NULL;
if (nBox > 1)
{
if (dy < 0)
{
/* Sort boxes from bottom to top */
pBoxNew1 = ALLOCATE_LOCAL_ARRAY(BoxRec, nBox);
if (pBoxNew1)
{
pBoxBase = pBoxNext = pBox + nBox - 1;
while (pBoxBase >= pBox)
{
while ((pBoxNext >= pBox) &&
(pBoxBase->y1 == pBoxNext->y1))
pBoxNext--;
pBoxTmp = pBoxNext + 1;
while (pBoxTmp <= pBoxBase)
*pBoxNew1++ = *pBoxTmp++;
pBoxBase = pBoxNext;
}
pBoxNew1 -= nBox;
pBox = pBoxNew1;
}
}
if (dx < 0)
{
/* Sort boxes from right to left */
pBoxNew2 = ALLOCATE_LOCAL_ARRAY(BoxRec, nBox);
if (pBoxNew2)
{
pBoxBase = pBoxNext = pBox;
while (pBoxBase < pBox + nBox)
{
while ((pBoxNext < pBox + nBox) &&
(pBoxNext->y1 == pBoxBase->y1))
pBoxNext++;
pBoxTmp = pBoxNext;
while (pBoxTmp != pBoxBase)
*pBoxNew2++ = *--pBoxTmp;
pBoxBase = pBoxNext;
}
pBoxNew2 -= nBox;
pBox = pBoxNew2;
}
}
}
while (nBox--)
{
(*pGC->ops->CopyArea)(pDrawable, pDrawable, pGC,
pBox->x1 + dx, pBox->y1 + dy,
pBox->x2 - pBox->x1, pBox->y2 - pBox->y1,
pBox->x1, pBox->y1);
pBox++;
}
FreeScratchGC(pGC);
REGION_DESTROY(pScreen, pRgnDst);
DEALLOCATE_LOCAL(pBoxNew2);
DEALLOCATE_LOCAL(pBoxNew1);
}
/**************************
* Backing store wrappers *
**************************/
static void
miBankSaveAreas(
PixmapPtr pPixmap,
RegionPtr prgnSave,
int xorg,
int yorg,
WindowPtr pWin
)
{
ScreenPtr pScreen = pPixmap->drawable.pScreen;
RegionRec rgnClipped;
int i;
SCREEN_INIT;
SCREEN_SAVE;
SCREEN_UNWRAP(BackingStoreFuncs.SaveAreas);
if (!IS_BANKED(pWin))
{
(*pScreen->BackingStoreFuncs.SaveAreas)(pPixmap, prgnSave, xorg, yorg,
pWin);
}
else
{
REGION_NULL(pScreen, &rgnClipped);
REGION_TRANSLATE(pScreen, prgnSave, xorg, yorg);
for (i = 0; i < pScreenPriv->nBanks; i++)
{
if (!pScreenPriv->pBanks[i])
continue;
REGION_INTERSECT(pScreen, &rgnClipped,
prgnSave, pScreenPriv->pBanks[i]);
if (REGION_NIL(&rgnClipped))
continue;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, i);
REGION_TRANSLATE(pScreen, &rgnClipped, -xorg, -yorg);
(*pScreen->BackingStoreFuncs.SaveAreas)(pPixmap, &rgnClipped,
xorg, yorg, pWin);
}
REGION_TRANSLATE(pScreen, prgnSave, -xorg, -yorg);
REGION_UNINIT(pScreen, &rgnClipped);
}
SCREEN_WRAP(BackingStoreFuncs.SaveAreas, miBankSaveAreas);
SCREEN_RESTORE;
}
static void
miBankRestoreAreas(
PixmapPtr pPixmap,
RegionPtr prgnRestore,
int xorg,
int yorg,
WindowPtr pWin
)
{
ScreenPtr pScreen = pPixmap->drawable.pScreen;
RegionRec rgnClipped;
int i;
SCREEN_INIT;
SCREEN_SAVE;
SCREEN_UNWRAP(BackingStoreFuncs.RestoreAreas);
if (!IS_BANKED(pWin))
{
(*pScreen->BackingStoreFuncs.RestoreAreas)(pPixmap, prgnRestore,
xorg, yorg, pWin);
}
else
{
REGION_NULL(pScreen, &rgnClipped);
for (i = 0; i < pScreenPriv->nBanks; i++)
{
if (!pScreenPriv->pBanks[i])
continue;
REGION_INTERSECT(pScreen, &rgnClipped,
prgnRestore, pScreenPriv->pBanks[i]);
if (REGION_NIL(&rgnClipped))
continue;
SET_SINGLE_BANK(pScreenPriv->pScreenPixmap, -1, -1, i);
(*pScreen->BackingStoreFuncs.RestoreAreas)(pPixmap, &rgnClipped,
xorg, yorg, pWin);
}
REGION_UNINIT(pScreen, &rgnClipped);
}
SCREEN_WRAP(BackingStoreFuncs.RestoreAreas, miBankRestoreAreas);
SCREEN_RESTORE;
}
_X_EXPORT Bool
miInitializeBanking(
ScreenPtr pScreen,
unsigned int xsize,
unsigned int ysize,
unsigned int width,
miBankInfoPtr pBankInfo
)
{
miBankScreenPtr pScreenPriv;
unsigned long nBitsPerBank, nBitsPerScanline, nPixelsPerScanlinePadUnit;
unsigned long BankBase, ServerPad;
unsigned int type, iBank, nBanks, maxRects, we, nBankBPP;
int i;
if (!pBankInfo || !pBankInfo->BankSize)
return TRUE; /* No banking required */
/* Sanity checks */
if (!pScreen || !xsize || !ysize || (xsize > width) ||
!pBankInfo->SetSourceBank || !pBankInfo->SetDestinationBank ||
!pBankInfo->SetSourceAndDestinationBanks ||
!pBankInfo->pBankA || !pBankInfo->pBankB ||
!pBankInfo->nBankDepth)
return FALSE;
/*
* DDX *must* have registered a pixmap format whose depth is
* pBankInfo->nBankDepth. This is not necessarily the rootDepth
* pixmap format.
*/
i = 0;
while (screenInfo.formats[i].depth != pBankInfo->nBankDepth)
if (++i >= screenInfo.numPixmapFormats)
return FALSE;
nBankBPP = screenInfo.formats[i].bitsPerPixel;
i = 0;
while (screenInfo.formats[i].depth != pScreen->rootDepth)
if (++i >= screenInfo.numPixmapFormats)
return FALSE;
if (nBankBPP > screenInfo.formats[i].bitsPerPixel)
return FALSE;
/* Determine banking type */
if ((type = miBankDeriveType(pScreen, pBankInfo)) == BANK_NOBANK)
return FALSE;
/* Internal data */
nBitsPerBank = pBankInfo->BankSize * 8;
ServerPad = PixmapBytePad(1, pBankInfo->nBankDepth) * 8;
if (nBitsPerBank % ServerPad)
return FALSE;
nBitsPerScanline = PixmapBytePad(width, pBankInfo->nBankDepth) * 8;
nBanks = ((nBitsPerScanline * (ysize - 1)) +
(nBankBPP * xsize) + nBitsPerBank - 1) / nBitsPerBank;
nPixelsPerScanlinePadUnit = miLCM(ServerPad, nBankBPP) / nBankBPP;
/* Private areas */
if (miBankGeneration != serverGeneration)
{
if (((miBankScreenIndex = AllocateScreenPrivateIndex()) < 0) ||
((miBankGCIndex = AllocateGCPrivateIndex()) < 0))
return FALSE;
miBankGeneration = serverGeneration;
}
if (!AllocateGCPrivate(pScreen, miBankGCIndex,
(nBanks * sizeof(RegionPtr)) +
(sizeof(miBankGCRec) - sizeof(RegionPtr))))
return FALSE;
if (!(pScreenPriv = (miBankScreenPtr)Xcalloc(sizeof(miBankScreenRec))))
return FALSE;
if (!(pScreenPriv->pBanks = /* Allocate and clear */
(RegionPtr *)Xcalloc(nBanks * sizeof(RegionPtr))))
{
Xfree(pScreenPriv);
return FALSE;
}
/*
* Translate banks into clipping regions which are themselves clipped
* against the screen. This also ensures that pixels with imbedded bank
* boundaries are off-screen.
*/
BankBase = 0;
maxRects = 0;
we = 0;
for (iBank = 0; iBank < nBanks; iBank++)
{
xRectangle pRects[3], *pRect = pRects;
unsigned int xb, yb, xe, ye;
xb = ((BankBase + nBankBPP - 1) % nBitsPerScanline) / nBankBPP;
yb = (BankBase + nBankBPP - 1) / nBitsPerScanline;
if (xb >= xsize)
{
xb = we = 0;
yb++;
}
if (yb >= ysize)
{
we = 0;
break;
}
if (we)
break;
BankBase += nBitsPerBank;
we = (BankBase % nBitsPerScanline) % nBankBPP;
xe = (BankBase % nBitsPerScanline) / nBankBPP;
ye = BankBase / nBitsPerScanline;
if (xe >= xsize)
{
we = xe = 0;
ye++;
}
if (ye >= ysize)
{
we = xe = 0;
ye = ysize;
}
if (yb == ye)
{
if (xb >= xe)
continue;
pRect->x = xb;
pRect->y = yb;
pRect->width = xe - xb;
pRect->height = 1;
maxRects += 2;
pRect++;
}
else
{
if (xb)
{
pRect->x = xb;
pRect->y = yb++;
pRect->width = xsize - xb;
pRect->height = 1;
maxRects += 2;
pRect++;
}
if (yb < ye)
{
pRect->x = 0;
pRect->y = yb;
pRect->width = xsize;
pRect->height = ye - yb;
maxRects += min(pRect->height, 3) + 1;
pRect++;
}
if (xe)
{
pRect->x = 0;
pRect->y = ye;
pRect->width = xe;
pRect->height = 1;
maxRects += 2;
pRect++;
}
}
pScreenPriv->pBanks[iBank] =
RECTS_TO_REGION(pScreen, pRect - pRects, pRects, 0);
if (!pScreenPriv->pBanks[iBank] ||
REGION_NAR(pScreenPriv->pBanks[iBank]))
{
we = 1;
break;
}
}
if (we && (iBank < nBanks))
{
for (i = iBank; i >= 0; i--)
if (pScreenPriv->pBanks[i])
REGION_DESTROY(pScreen, pScreenPriv->pBanks[i]);
Xfree(pScreenPriv->pBanks);
Xfree(pScreenPriv);
return FALSE;
}
/* Open for business */
pScreenPriv->type = type;
pScreenPriv->nBanks = nBanks;
pScreenPriv->maxRects = maxRects;
pScreenPriv->nBankBPP = nBankBPP;
pScreenPriv->BankInfo = *pBankInfo;
pScreenPriv->nBitsPerBank = nBitsPerBank;
pScreenPriv->nBitsPerScanline = nBitsPerScanline;
pScreenPriv->nPixelsPerScanlinePadUnit = nPixelsPerScanlinePadUnit;
SCREEN_WRAP(CreateScreenResources, miBankCreateScreenResources);
SCREEN_WRAP(ModifyPixmapHeader, miBankModifyPixmapHeader);
SCREEN_WRAP(CloseScreen, miBankCloseScreen);
SCREEN_WRAP(GetImage, miBankGetImage);
SCREEN_WRAP(GetSpans, miBankGetSpans);
SCREEN_WRAP(CreateGC, miBankCreateGC);
SCREEN_WRAP(PaintWindowBackground, miBankPaintWindow);
SCREEN_WRAP(PaintWindowBorder, miBankPaintWindow);
SCREEN_WRAP(CopyWindow, miBankCopyWindow);
pScreenPriv->BackingStoreFuncs = pScreen->BackingStoreFuncs;
pScreen->BackingStoreFuncs.SaveAreas = miBankSaveAreas;
pScreen->BackingStoreFuncs.RestoreAreas = miBankRestoreAreas;
/* ??????????????????????????????????????????????????????????????
pScreen->BackingStoreFuncs.SetClipmaskRgn = miBankSetClipmaskRgn;
?????????????????????????????????????????????????????????????? */
BANK_SCRPRIVLVAL = (pointer)pScreenPriv;
return TRUE;
}
/* This is used to force GC revalidation when the banking type is changed */
/*ARGSUSED*/
static int
miBankNewSerialNumber(
WindowPtr pWin,
pointer unused
)
{
pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
return WT_WALKCHILDREN;
}
/* This entry modifies the banking interface */
_X_EXPORT Bool
miModifyBanking(
ScreenPtr pScreen,
miBankInfoPtr pBankInfo
)
{
unsigned int type;
if (!pScreen)
return FALSE;
if (miBankGeneration == serverGeneration)
{
SCREEN_INIT;
if (pScreenPriv)
{
if (!pBankInfo || !pBankInfo->BankSize ||
!pBankInfo->pBankA || !pBankInfo->pBankB ||
!pBankInfo->SetSourceBank || !pBankInfo->SetDestinationBank ||
!pBankInfo->SetSourceAndDestinationBanks)
return FALSE;
/* BankSize and nBankDepth cannot, as yet, be changed */
if ((pScreenPriv->BankInfo.BankSize != pBankInfo->BankSize) ||
(pScreenPriv->BankInfo.nBankDepth != pBankInfo->nBankDepth))
return FALSE;
if ((type = miBankDeriveType(pScreen, pBankInfo)) == BANK_NOBANK)
return FALSE;
/* Reset banking info */
pScreenPriv->BankInfo = *pBankInfo;
if (type != pScreenPriv->type)
{
/*
* Banking type is changing. Revalidate all window GC's.
*/
pScreenPriv->type = type;
WalkTree(pScreen, miBankNewSerialNumber, 0);
}
return TRUE;
}
}
if (!pBankInfo || !pBankInfo->BankSize)
return TRUE; /* No change requested */
return FALSE;
}
/*
* Given various screen attributes, determine the minimum scanline width such
* that each scanline is server and DDX padded and any pixels with imbedded
* bank boundaries are off-screen. This function returns -1 if such a width
* cannot exist. This function exists because the DDX needs to be able to
* determine this width before initializing a frame buffer.
*/
int
miScanLineWidth(
unsigned int xsize, /* pixels */
unsigned int ysize, /* pixels */
unsigned int width, /* pixels */
unsigned long BankSize, /* char's */
PixmapFormatRec *pBankFormat,
unsigned int nWidthUnit /* bits */
)
{
unsigned long nBitsPerBank, nBitsPerScanline, nBitsPerScanlinePadUnit;
unsigned long minBitsPerScanline, maxBitsPerScanline;
/* Sanity checks */
if (!nWidthUnit || !pBankFormat)
return -1;
nBitsPerBank = BankSize * 8;
if (nBitsPerBank % pBankFormat->scanlinePad)
return -1;
if (xsize > width)
width = xsize;
nBitsPerScanlinePadUnit = miLCM(pBankFormat->scanlinePad, nWidthUnit);
nBitsPerScanline =
(((width * pBankFormat->bitsPerPixel) + nBitsPerScanlinePadUnit - 1) /
nBitsPerScanlinePadUnit) * nBitsPerScanlinePadUnit;
width = nBitsPerScanline / pBankFormat->bitsPerPixel;
if (!xsize || !(nBitsPerBank % pBankFormat->bitsPerPixel))
return (int)width;
/*
* Scanlines will be server-pad aligned at this point. They will also be
* a multiple of nWidthUnit bits long. Ensure that pixels with imbedded
* bank boundaries are off-screen.
*
* It seems reasonable to limit total frame buffer size to 1/16 of the
* theoretical maximum address space size. On a machine with 32-bit
* addresses (to 8-bit quantities) this turns out to be 256MB. Not only
* does this provide a simple limiting condition for the loops below, but
* it also prevents unsigned long wraparounds.
*/
if (!ysize)
return -1;
minBitsPerScanline = xsize * pBankFormat->bitsPerPixel;
if (minBitsPerScanline > nBitsPerBank)
return -1;
if (ysize == 1)
return (int)width;
maxBitsPerScanline =
(((unsigned long)(-1) >> 1) - minBitsPerScanline) / (ysize - 1);
while (nBitsPerScanline <= maxBitsPerScanline)
{
unsigned long BankBase, BankUnit;
BankUnit = ((nBitsPerBank + nBitsPerScanline - 1) / nBitsPerBank) *
nBitsPerBank;
if (!(BankUnit % nBitsPerScanline))
return (int)width;
for (BankBase = BankUnit; ; BankBase += nBitsPerBank)
{
unsigned long x, y;
y = BankBase / nBitsPerScanline;
if (y >= ysize)
return (int)width;
x = BankBase % nBitsPerScanline;
if (!(x % pBankFormat->bitsPerPixel))
continue;
if (x < minBitsPerScanline)
{
/*
* Skip ahead certain widths by dividing the excess scanline
* amongst the y's.
*/
y *= nBitsPerScanlinePadUnit;
nBitsPerScanline +=
((x + y - 1) / y) * nBitsPerScanlinePadUnit;
width = nBitsPerScanline / pBankFormat->bitsPerPixel;
break;
}
if (BankBase != BankUnit)
continue;
if (!(nBitsPerScanline % x))
return (int)width;
BankBase = ((nBitsPerScanline - minBitsPerScanline) /
(nBitsPerScanline - x)) * BankUnit;
}
}
return -1;
}
Reference in New Issue Copy Permalink