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xserver/exa/exa.c

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/*
* Copyright © 2001 Keith Packard
*
* Partly based on code that is Copyright © The XFree86 Project Inc.
*
* 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 Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD 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.
*/
/** @file
* This file covers the initialization and teardown of EXA, and has various
* functions not responsible for performing rendering, pixmap migration, or
* memory management.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdlib.h>
#include "exa_priv.h"
#include "exa.h"
static int exaScreenPrivateKeyIndex;
DevPrivateKey exaScreenPrivateKey = &exaScreenPrivateKeyIndex;
static int exaPixmapPrivateKeyIndex;
DevPrivateKey exaPixmapPrivateKey = &exaPixmapPrivateKeyIndex;
#ifdef MITSHM
static ShmFuncs exaShmFuncs = { NULL, NULL };
#endif
static _X_INLINE void*
ExaGetPixmapAddress(PixmapPtr p)
{
ExaPixmapPriv(p);
if (pExaPixmap->offscreen && pExaPixmap->fb_ptr)
return pExaPixmap->fb_ptr;
else
return pExaPixmap->sys_ptr;
}
/**
* exaGetPixmapOffset() returns the offset (in bytes) within the framebuffer of
* the beginning of the given pixmap.
*
* Note that drivers are free to, and often do, munge this offset as necessary
* for handing to the hardware -- for example, translating it into a different
* aperture. This function may need to be extended in the future if we grow
* support for having multiple card-accessible offscreen, such as an AGP memory
* pool alongside the framebuffer pool.
*/
unsigned long
exaGetPixmapOffset(PixmapPtr pPix)
{
ExaScreenPriv (pPix->drawable.pScreen);
return (CARD8 *)ExaGetPixmapAddress(pPix) - pExaScr->info->memoryBase;
}
void *
exaGetPixmapDriverPrivate(PixmapPtr pPix)
{
ExaPixmapPriv(pPix);
return pExaPixmap->driverPriv;
}
/**
* exaGetPixmapPitch() returns the pitch (in bytes) of the given pixmap.
*
* This is a helper to make driver code more obvious, due to the rather obscure
* naming of the pitch field in the pixmap.
*/
unsigned long
exaGetPixmapPitch(PixmapPtr pPix)
{
return pPix->devKind;
}
/**
* exaGetPixmapSize() returns the size in bytes of the given pixmap in video
* memory. Only valid when the pixmap is currently in framebuffer.
*/
unsigned long
exaGetPixmapSize(PixmapPtr pPix)
{
ExaPixmapPrivPtr pExaPixmap;
pExaPixmap = ExaGetPixmapPriv(pPix);
if (pExaPixmap != NULL)
return pExaPixmap->fb_size;
return 0;
}
/**
* exaGetDrawablePixmap() returns a backing pixmap for a given drawable.
*
* @param pDrawable the drawable being requested.
*
* This function returns the backing pixmap for a drawable, whether it is a
* redirected window, unredirected window, or already a pixmap. Note that
* coordinate translation is needed when drawing to the backing pixmap of a
* redirected window, and the translation coordinates are provided by calling
* exaGetOffscreenPixmap() on the drawable.
*/
PixmapPtr
exaGetDrawablePixmap(DrawablePtr pDrawable)
{
if (pDrawable->type == DRAWABLE_WINDOW)
return pDrawable->pScreen->GetWindowPixmap ((WindowPtr) pDrawable);
else
return (PixmapPtr) pDrawable;
}
/**
* Sets the offsets to add to coordinates to make them address the same bits in
* the backing drawable. These coordinates are nonzero only for redirected
* windows.
*/
void
exaGetDrawableDeltas (DrawablePtr pDrawable, PixmapPtr pPixmap,
int *xp, int *yp)
{
#ifdef COMPOSITE
if (pDrawable->type == DRAWABLE_WINDOW) {
*xp = -pPixmap->screen_x;
*yp = -pPixmap->screen_y;
return;
}
#endif
*xp = 0;
*yp = 0;
}
/**
* exaPixmapDirty() marks a pixmap as dirty, allowing for
* optimizations in pixmap migration when no changes have occurred.
*/
void
exaPixmapDirty (PixmapPtr pPix, int x1, int y1, int x2, int y2)
{
ExaPixmapPriv(pPix);
BoxRec box;
RegionPtr pDamageReg;
RegionRec region;
if (!pExaPixmap || !pExaPixmap->pDamage)
return;
box.x1 = max(x1, 0);
box.y1 = max(y1, 0);
box.x2 = min(x2, pPix->drawable.width);
box.y2 = min(y2, pPix->drawable.height);
if (box.x1 >= box.x2 || box.y1 >= box.y2)
return;
pDamageReg = DamageRegion(pExaPixmap->pDamage);
REGION_INIT(pScreen, &region, &box, 1);
REGION_UNION(pScreen, pDamageReg, pDamageReg, &region);
REGION_UNINIT(pScreen, &region);
}
static Bool
exaDestroyPixmap (PixmapPtr pPixmap)
{
ScreenPtr pScreen = pPixmap->drawable.pScreen;
ExaScreenPriv(pScreen);
if (pPixmap->refcnt == 1)
{
ExaPixmapPriv (pPixmap);
if (pExaPixmap->driverPriv) {
pExaScr->info->DestroyPixmap(pScreen, pExaPixmap->driverPriv);
pExaPixmap->driverPriv = NULL;
}
if (pExaPixmap->area)
{
DBG_PIXMAP(("-- 0x%p (0x%x) (%dx%d)\n",
(void*)pPixmap->drawable.id,
ExaGetPixmapPriv(pPixmap)->area->offset,
pPixmap->drawable.width,
pPixmap->drawable.height));
/* Free the offscreen area */
exaOffscreenFree (pPixmap->drawable.pScreen, pExaPixmap->area);
pPixmap->devPrivate.ptr = pExaPixmap->sys_ptr;
pPixmap->devKind = pExaPixmap->sys_pitch;
}
REGION_UNINIT(pPixmap->drawable.pScreen, &pExaPixmap->validSys);
REGION_UNINIT(pPixmap->drawable.pScreen, &pExaPixmap->validFB);
}
return fbDestroyPixmap (pPixmap);
}
static int
exaLog2(int val)
{
int bits;
if (val <= 0)
return 0;
for (bits = 0; val != 0; bits++)
val >>= 1;
return bits - 1;
}
static void
exaSetAccelBlock(ExaScreenPrivPtr pExaScr, ExaPixmapPrivPtr pExaPixmap,
int w, int h, int bpp)
{
pExaPixmap->accel_blocked = 0;
if (pExaScr->info->maxPitchPixels) {
int max_pitch = pExaScr->info->maxPitchPixels * (bpp + 7) / 8;
if (pExaPixmap->fb_pitch > max_pitch)
pExaPixmap->accel_blocked |= EXA_RANGE_PITCH;
}
if (pExaScr->info->maxPitchBytes &&
pExaPixmap->fb_pitch > pExaScr->info->maxPitchBytes)
pExaPixmap->accel_blocked |= EXA_RANGE_PITCH;
if (w > pExaScr->info->maxX)
pExaPixmap->accel_blocked |= EXA_RANGE_WIDTH;
if (h > pExaScr->info->maxY)
pExaPixmap->accel_blocked |= EXA_RANGE_HEIGHT;
}
static void
exaSetFbPitch(ExaScreenPrivPtr pExaScr, ExaPixmapPrivPtr pExaPixmap,
int w, int h, int bpp)
{
if (pExaScr->info->flags & EXA_OFFSCREEN_ALIGN_POT && w != 1)
pExaPixmap->fb_pitch = (1 << (exaLog2(w - 1) + 1)) * bpp / 8;
else
pExaPixmap->fb_pitch = w * bpp / 8;
pExaPixmap->fb_pitch = EXA_ALIGN(pExaPixmap->fb_pitch,
pExaScr->info->pixmapPitchAlign);
}
/**
* exaCreatePixmap() creates a new pixmap.
*
* If width and height are 0, this won't be a full-fledged pixmap and it will
* get ModifyPixmapHeader() called on it later. So, we mark it as pinned, because
* ModifyPixmapHeader() would break migration. These types of pixmaps are used
* for scratch pixmaps, or to represent the visible screen.
*/
static PixmapPtr
exaCreatePixmap(ScreenPtr pScreen, int w, int h, int depth,
unsigned usage_hint)
{
PixmapPtr pPixmap;
ExaPixmapPrivPtr pExaPixmap;
int driver_alloc = 0;
int bpp;
ExaScreenPriv(pScreen);
if (w > 32767 || h > 32767)
return NullPixmap;
if (!pExaScr->info->CreatePixmap) {
pPixmap = fbCreatePixmap (pScreen, w, h, depth, usage_hint);
} else {
driver_alloc = 1;
pPixmap = fbCreatePixmap(pScreen, 0, 0, depth, usage_hint);
}
if (!pPixmap)
return NULL;
pExaPixmap = ExaGetPixmapPriv(pPixmap);
pExaPixmap->driverPriv = NULL;
bpp = pPixmap->drawable.bitsPerPixel;
if (driver_alloc) {
size_t paddedWidth, datasize;
paddedWidth = ((w * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
if (paddedWidth / 4 > 32767 || h > 32767)
return NullPixmap;
exaSetFbPitch(pExaScr, pExaPixmap, w, h, bpp);
if (paddedWidth < pExaPixmap->fb_pitch)
paddedWidth = pExaPixmap->fb_pitch;
datasize = h * paddedWidth;
/* Set this before driver hooks, to allow for !offscreen pixmaps.
* !offscreen pixmaps have a valid pointer at all times.
*/
pPixmap->devPrivate.ptr = NULL;
pExaPixmap->driverPriv = pExaScr->info->CreatePixmap(pScreen, datasize, 0);
if (!pExaPixmap->driverPriv) {
fbDestroyPixmap(pPixmap);
return NULL;
}
(*pScreen->ModifyPixmapHeader)(pPixmap, w, h, 0, 0,
paddedWidth, NULL);
pExaPixmap->score = EXA_PIXMAP_SCORE_PINNED;
pExaPixmap->fb_ptr = NULL;
pExaPixmap->pDamage = NULL;
pExaPixmap->sys_ptr = pPixmap->devPrivate.ptr;
} else {
pExaPixmap->driverPriv = NULL;
/* Scratch pixmaps may have w/h equal to zero, and may not be
* migrated.
*/
if (!w || !h)
pExaPixmap->score = EXA_PIXMAP_SCORE_PINNED;
else
pExaPixmap->score = EXA_PIXMAP_SCORE_INIT;
pExaPixmap->sys_ptr = pPixmap->devPrivate.ptr;
pExaPixmap->sys_pitch = pPixmap->devKind;
pPixmap->devPrivate.ptr = NULL;
pExaPixmap->offscreen = FALSE;
pExaPixmap->fb_ptr = NULL;
exaSetFbPitch(pExaScr, pExaPixmap, w, h, bpp);
pExaPixmap->fb_size = pExaPixmap->fb_pitch * h;
if (pExaPixmap->fb_pitch > 131071) {
fbDestroyPixmap(pPixmap);
return NULL;
}
/* Set up damage tracking */
pExaPixmap->pDamage = DamageCreate (NULL, NULL,
DamageReportNone, TRUE,
pScreen, pPixmap);
if (pExaPixmap->pDamage == NULL) {
fbDestroyPixmap (pPixmap);
return NULL;
}
DamageRegister (&pPixmap->drawable, pExaPixmap->pDamage);
/* This ensures that pending damage reflects the current operation. */
/* This is used by exa to optimize migration. */
DamageSetReportAfterOp (pExaPixmap->pDamage, TRUE);
}
pExaPixmap->area = NULL;
/* None of the pixmap bits are valid initially */
REGION_NULL(pScreen, &pExaPixmap->validSys);
REGION_NULL(pScreen, &pExaPixmap->validFB);
exaSetAccelBlock(pExaScr, pExaPixmap,
w, h, bpp);
return pPixmap;
}
static Bool
exaModifyPixmapHeader(PixmapPtr pPixmap, int width, int height, int depth,
int bitsPerPixel, int devKind, pointer pPixData)
{
ExaScreenPrivPtr pExaScr;
ExaPixmapPrivPtr pExaPixmap;
Bool ret;
if (!pPixmap)
return FALSE;
pExaScr = ExaGetScreenPriv(pPixmap->drawable.pScreen);
pExaPixmap = ExaGetPixmapPriv(pPixmap);
if (pExaPixmap) {
if (pPixData)
pExaPixmap->sys_ptr = pPixData;
if (devKind > 0)
pExaPixmap->sys_pitch = devKind;
if (width > 0 && height > 0 && bitsPerPixel > 0) {
exaSetFbPitch(pExaScr, pExaPixmap,
width, height, bitsPerPixel);
exaSetAccelBlock(pExaScr, pExaPixmap,
width, height, bitsPerPixel);
}
}
if (pExaScr->info->ModifyPixmapHeader) {
ret = pExaScr->info->ModifyPixmapHeader(pPixmap, width, height, depth,
bitsPerPixel, devKind, pPixData);
if (ret == TRUE)
return ret;
}
return pExaScr->SavedModifyPixmapHeader(pPixmap, width, height, depth,
bitsPerPixel, devKind, pPixData);
}
/**
* exaPixmapIsOffscreen() is used to determine if a pixmap is in offscreen
* memory, meaning that acceleration could probably be done to it, and that it
* will need to be wrapped by PrepareAccess()/FinishAccess() when accessing it
* with the CPU.
*
* Note that except for UploadToScreen()/DownloadFromScreen() (which explicitly
* deal with moving pixmaps in and out of system memory), EXA will give drivers
* pixmaps as arguments for which exaPixmapIsOffscreen() is TRUE.
*
* @return TRUE if the given drawable is in framebuffer memory.
*/
Bool
exaPixmapIsOffscreen(PixmapPtr p)
{
ScreenPtr pScreen = p->drawable.pScreen;
ExaScreenPriv(pScreen);
ExaPixmapPriv(p);
void *save_ptr;
Bool ret;
save_ptr = p->devPrivate.ptr;
if (!save_ptr && pExaPixmap && !(pExaScr->info->flags & EXA_HANDLES_PIXMAPS))
p->devPrivate.ptr = ExaGetPixmapAddress(p);
if (pExaScr->info->PixmapIsOffscreen)
ret = pExaScr->info->PixmapIsOffscreen(p);
else
ret = ((unsigned long) ((CARD8 *) p->devPrivate.ptr -
(CARD8 *) pExaScr->info->memoryBase) <
pExaScr->info->memorySize);
p->devPrivate.ptr = save_ptr;
return ret;
}
/**
* exaDrawableIsOffscreen() is a convenience wrapper for exaPixmapIsOffscreen().
*/
Bool
exaDrawableIsOffscreen (DrawablePtr pDrawable)
{
return exaPixmapIsOffscreen (exaGetDrawablePixmap (pDrawable));
}
/**
* Returns the pixmap which backs a drawable, and the offsets to add to
* coordinates to make them address the same bits in the backing drawable.
*/
PixmapPtr
exaGetOffscreenPixmap (DrawablePtr pDrawable, int *xp, int *yp)
{
PixmapPtr pPixmap = exaGetDrawablePixmap (pDrawable);
exaGetDrawableDeltas (pDrawable, pPixmap, xp, yp);
if (exaPixmapIsOffscreen (pPixmap))
return pPixmap;
else
return NULL;
}
void
ExaDoPrepareAccess(DrawablePtr pDrawable, int index)
{
ScreenPtr pScreen = pDrawable->pScreen;
ExaScreenPriv (pScreen);
PixmapPtr pPixmap = exaGetDrawablePixmap (pDrawable);
Bool offscreen = exaPixmapIsOffscreen(pPixmap);
/* Unhide pixmap pointer */
if (pPixmap->devPrivate.ptr == NULL && !(pExaScr->info->flags & EXA_HANDLES_PIXMAPS)) {
pPixmap->devPrivate.ptr = ExaGetPixmapAddress(pPixmap);
}
if (!offscreen)
return;
exaWaitSync (pDrawable->pScreen);
if (pExaScr->info->PrepareAccess == NULL)
return;
if (!(*pExaScr->info->PrepareAccess) (pPixmap, index)) {
ExaPixmapPriv (pPixmap);
if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
FatalError("Driver failed PrepareAccess on a pinned pixmap\n");
exaMoveOutPixmap (pPixmap);
}
}
void
exaPrepareAccessReg(DrawablePtr pDrawable, int index, RegionPtr pReg)
{
ExaMigrationRec pixmaps[1];
pixmaps[0].as_dst = index == EXA_PREPARE_DEST;
pixmaps[0].as_src = index != EXA_PREPARE_DEST;
pixmaps[0].pPix = exaGetDrawablePixmap (pDrawable);
pixmaps[0].pReg = pReg;
exaDoMigration(pixmaps, 1, FALSE);
ExaDoPrepareAccess(pDrawable, index);
}
/**
* exaPrepareAccess() is EXA's wrapper for the driver's PrepareAccess() handler.
*
* It deals with waiting for synchronization with the card, determining if
* PrepareAccess() is necessary, and working around PrepareAccess() failure.
*/
void
exaPrepareAccess(DrawablePtr pDrawable, int index)
{
exaPrepareAccessReg(pDrawable, index, NULL);
}
/**
* exaFinishAccess() is EXA's wrapper for the driver's FinishAccess() handler.
*
* It deals with calling the driver's FinishAccess() only if necessary.
*/
void
exaFinishAccess(DrawablePtr pDrawable, int index)
{
ScreenPtr pScreen = pDrawable->pScreen;
ExaScreenPriv (pScreen);
PixmapPtr pPixmap = exaGetDrawablePixmap (pDrawable);
ExaPixmapPriv (pPixmap);
/* Rehide pixmap pointer if we're doing that. */
if (pExaPixmap && !(pExaScr->info->flags & EXA_HANDLES_PIXMAPS)) {
pPixmap->devPrivate.ptr = NULL;
}
if (pExaScr->info->FinishAccess == NULL)
return;
if (!exaPixmapIsOffscreen (pPixmap))
return;
(*pExaScr->info->FinishAccess) (pPixmap, index);
}
/**
* exaValidateGC() sets the ops to EXA's implementations, which may be
* accelerated or may sync the card and fall back to fb.
*/
static void
exaValidateGC (GCPtr pGC, unsigned long changes, DrawablePtr pDrawable)
{
/* fbValidateGC will do direct access to pixmaps if the tiling has changed.
* Preempt fbValidateGC by doing its work and masking the change out, so
* that we can do the Prepare/FinishAccess.
*/
#ifdef FB_24_32BIT
if ((changes & GCTile) && fbGetRotatedPixmap(pGC)) {
(*pGC->pScreen->DestroyPixmap) (fbGetRotatedPixmap(pGC));
fbGetRotatedPixmap(pGC) = 0;
}
if (pGC->fillStyle == FillTiled) {
PixmapPtr pOldTile, pNewTile;
pOldTile = pGC->tile.pixmap;
if (pOldTile->drawable.bitsPerPixel != pDrawable->bitsPerPixel)
{
pNewTile = fbGetRotatedPixmap(pGC);
if (!pNewTile ||
pNewTile ->drawable.bitsPerPixel != pDrawable->bitsPerPixel)
{
if (pNewTile)
(*pGC->pScreen->DestroyPixmap) (pNewTile);
/* fb24_32ReformatTile will do direct access of a newly-
* allocated pixmap. This isn't a problem yet, since we don't
* put pixmaps in FB until at least one accelerated EXA op.
*/
exaPrepareAccess(&pOldTile->drawable, EXA_PREPARE_SRC);
pNewTile = fb24_32ReformatTile (pOldTile,
pDrawable->bitsPerPixel);
exaPixmapDirty(pNewTile, 0, 0, pNewTile->drawable.width, pNewTile->drawable.height);
exaFinishAccess(&pOldTile->drawable, EXA_PREPARE_SRC);
}
if (pNewTile)
{
fbGetRotatedPixmap(pGC) = pOldTile;
pGC->tile.pixmap = pNewTile;
changes |= GCTile;
}
}
}
#endif
if (changes & GCTile) {
if (!pGC->tileIsPixel && FbEvenTile (pGC->tile.pixmap->drawable.width *
pDrawable->bitsPerPixel))
{
exaPrepareAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_SRC);
fbPadPixmap (pGC->tile.pixmap);
exaFinishAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_SRC);
exaPixmapDirty(pGC->tile.pixmap, 0, 0,
pGC->tile.pixmap->drawable.width,
pGC->tile.pixmap->drawable.height);
}
/* Mask out the GCTile change notification, now that we've done FB's
* job for it.
*/
changes &= ~GCTile;
}
exaPrepareAccessGC(pGC);
fbValidateGC (pGC, changes, pDrawable);
exaFinishAccessGC(pGC);
pGC->ops = (GCOps *) &exaOps;
}
static GCFuncs exaGCFuncs = {
exaValidateGC,
miChangeGC,
miCopyGC,
miDestroyGC,
miChangeClip,
miDestroyClip,
miCopyClip
};
/**
* exaCreateGC makes a new GC and hooks up its funcs handler, so that
* exaValidateGC() will get called.
*/
static int
exaCreateGC (GCPtr pGC)
{
if (!fbCreateGC (pGC))
return FALSE;
pGC->funcs = &exaGCFuncs;
return TRUE;
}
static Bool
exaChangeWindowAttributes(WindowPtr pWin, unsigned long mask)
{
Bool ret;
if ((mask & CWBackPixmap) && pWin->backgroundState == BackgroundPixmap)
exaPrepareAccess(&pWin->background.pixmap->drawable, EXA_PREPARE_SRC);
if ((mask & CWBorderPixmap) && pWin->borderIsPixel == FALSE)
exaPrepareAccess(&pWin->border.pixmap->drawable, EXA_PREPARE_MASK);
ret = fbChangeWindowAttributes(pWin, mask);
if ((mask & CWBorderPixmap) && pWin->borderIsPixel == FALSE)
exaFinishAccess(&pWin->border.pixmap->drawable, EXA_PREPARE_MASK);
if ((mask & CWBackPixmap) && pWin->backgroundState == BackgroundPixmap)
exaFinishAccess(&pWin->background.pixmap->drawable, EXA_PREPARE_SRC);
return ret;
}
static RegionPtr
exaBitmapToRegion(PixmapPtr pPix)
{
RegionPtr ret;
exaPrepareAccess(&pPix->drawable, EXA_PREPARE_SRC);
ret = fbPixmapToRegion(pPix);
exaFinishAccess(&pPix->drawable, EXA_PREPARE_SRC);
return ret;
}
static Bool
exaCreateScreenResources(ScreenPtr pScreen)
{
ExaScreenPriv(pScreen);
PixmapPtr pScreenPixmap;
Bool b;
pScreen->CreateScreenResources = pExaScr->SavedCreateScreenResources;
b = pScreen->CreateScreenResources(pScreen);
pScreen->CreateScreenResources = exaCreateScreenResources;
if (!b)
return FALSE;
pScreenPixmap = pScreen->GetScreenPixmap(pScreen);
if (pScreenPixmap) {
ExaPixmapPriv(pScreenPixmap);
exaSetAccelBlock(pExaScr, pExaPixmap,
pScreenPixmap->drawable.width,
pScreenPixmap->drawable.height,
pScreenPixmap->drawable.bitsPerPixel);
}
return TRUE;
}
/**
* exaCloseScreen() unwraps its wrapped screen functions and tears down EXA's
* screen private, before calling down to the next CloseSccreen.
*/
static Bool
exaCloseScreen(int i, ScreenPtr pScreen)
{
ExaScreenPriv(pScreen);
#ifdef RENDER
PictureScreenPtr ps = GetPictureScreenIfSet(pScreen);
#endif
if (ps->Glyphs == exaGlyphs)
exaGlyphsFini(pScreen);
pScreen->CreateGC = pExaScr->SavedCreateGC;
pScreen->CloseScreen = pExaScr->SavedCloseScreen;
pScreen->GetImage = pExaScr->SavedGetImage;
pScreen->GetSpans = pExaScr->SavedGetSpans;
pScreen->CreatePixmap = pExaScr->SavedCreatePixmap;
pScreen->DestroyPixmap = pExaScr->SavedDestroyPixmap;
pScreen->CopyWindow = pExaScr->SavedCopyWindow;
pScreen->ChangeWindowAttributes = pExaScr->SavedChangeWindowAttributes;
pScreen->BitmapToRegion = pExaScr->SavedBitmapToRegion;
pScreen->CreateScreenResources = pExaScr->SavedCreateScreenResources;
#ifdef RENDER
if (ps) {
ps->Composite = pExaScr->SavedComposite;
ps->Glyphs = pExaScr->SavedGlyphs;
ps->Trapezoids = pExaScr->SavedTrapezoids;
ps->Triangles = pExaScr->SavedTriangles;
ps->AddTraps = pExaScr->SavedAddTraps;
}
#endif
xfree (pExaScr);
return (*pScreen->CloseScreen) (i, pScreen);
}
/**
* This function allocates a driver structure for EXA drivers to fill in. By
* having EXA allocate the structure, the driver structure can be extended
* without breaking ABI between EXA and the drivers. The driver's
* responsibility is to check beforehand that the EXA module has a matching
* major number and sufficient minor. Drivers are responsible for freeing the
* driver structure using xfree().
*
* @return a newly allocated, zero-filled driver structure
*/
ExaDriverPtr
exaDriverAlloc(void)
{
return xcalloc(1, sizeof(ExaDriverRec));
}
/**
* @param pScreen screen being initialized
* @param pScreenInfo EXA driver record
*
* exaDriverInit sets up EXA given a driver record filled in by the driver.
* pScreenInfo should have been allocated by exaDriverAlloc(). See the
* comments in _ExaDriver for what must be filled in and what is optional.
*
* @return TRUE if EXA was successfully initialized.
*/
Bool
exaDriverInit (ScreenPtr pScreen,
ExaDriverPtr pScreenInfo)
{
ExaScreenPrivPtr pExaScr;
#ifdef RENDER
PictureScreenPtr ps;
#endif
if (!pScreenInfo)
return FALSE;
if (pScreenInfo->exa_major != EXA_VERSION_MAJOR ||
pScreenInfo->exa_minor > EXA_VERSION_MINOR)
{
LogMessage(X_ERROR, "EXA(%d): driver's EXA version requirements "
"(%d.%d) are incompatible with EXA version (%d.%d)\n",
pScreen->myNum,
pScreenInfo->exa_major, pScreenInfo->exa_minor,
EXA_VERSION_MAJOR, EXA_VERSION_MINOR);
return FALSE;
}
if (!pScreenInfo->CreatePixmap) {
if (!pScreenInfo->memoryBase) {
LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::memoryBase "
"must be non-zero\n", pScreen->myNum);
return FALSE;
}
if (!pScreenInfo->memorySize) {
LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::memorySize must be "
"non-zero\n", pScreen->myNum);
return FALSE;
}
if (pScreenInfo->offScreenBase > pScreenInfo->memorySize) {
LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::offScreenBase must "
"be <= ExaDriverRec::memorySize\n", pScreen->myNum);
return FALSE;
}
}
if (!pScreenInfo->PrepareSolid) {
LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::PrepareSolid must be "
"non-NULL\n", pScreen->myNum);
return FALSE;
}
if (!pScreenInfo->PrepareCopy) {
LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::PrepareCopy must be "
"non-NULL\n", pScreen->myNum);
return FALSE;
}
if (!pScreenInfo->WaitMarker) {
LogMessage(X_ERROR, "EXA(%d): ExaDriverRec::WaitMarker must be "
"non-NULL\n", pScreen->myNum);
return FALSE;
}
/* If the driver doesn't set any max pitch values, we'll just assume
* that there's a limitation by pixels, and that it's the same as
* maxX.
*
* We want maxPitchPixels or maxPitchBytes to be set so we can check
* pixmaps against the max pitch in exaCreatePixmap() -- it matters
* whether a pixmap is rejected because of its pitch or
* because of its width.
*/
if (!pScreenInfo->maxPitchPixels && !pScreenInfo->maxPitchBytes)
{
pScreenInfo->maxPitchPixels = pScreenInfo->maxX;
}
#ifdef RENDER
ps = GetPictureScreenIfSet(pScreen);
#endif
pExaScr = xcalloc (sizeof (ExaScreenPrivRec), 1);
if (!pExaScr) {
LogMessage(X_WARNING, "EXA(%d): Failed to allocate screen private\n",
pScreen->myNum);
return FALSE;
}
pExaScr->info = pScreenInfo;
dixSetPrivate(&pScreen->devPrivates, exaScreenPrivateKey, pExaScr);
pExaScr->migration = ExaMigrationAlways;
exaDDXDriverInit(pScreen);
/*
* Replace various fb screen functions
*/
pExaScr->SavedCloseScreen = pScreen->CloseScreen;
pScreen->CloseScreen = exaCloseScreen;
pExaScr->SavedCreateGC = pScreen->CreateGC;
pScreen->CreateGC = exaCreateGC;
pExaScr->SavedGetImage = pScreen->GetImage;
pScreen->GetImage = exaGetImage;
pExaScr->SavedGetSpans = pScreen->GetSpans;
pScreen->GetSpans = ExaCheckGetSpans;
pExaScr->SavedCopyWindow = pScreen->CopyWindow;
pScreen->CopyWindow = exaCopyWindow;
pExaScr->SavedChangeWindowAttributes = pScreen->ChangeWindowAttributes;
pScreen->ChangeWindowAttributes = exaChangeWindowAttributes;
pExaScr->SavedBitmapToRegion = pScreen->BitmapToRegion;
pScreen->BitmapToRegion = exaBitmapToRegion;
pExaScr->SavedCreateScreenResources = pScreen->CreateScreenResources;
pScreen->CreateScreenResources = exaCreateScreenResources;
#ifdef RENDER
if (ps) {
pExaScr->SavedComposite = ps->Composite;
ps->Composite = exaComposite;
if (pScreenInfo->PrepareComposite) {
pExaScr->SavedGlyphs = ps->Glyphs;
ps->Glyphs = exaGlyphs;
}
pExaScr->SavedTriangles = ps->Triangles;
ps->Triangles = exaTriangles;
pExaScr->SavedTrapezoids = ps->Trapezoids;
ps->Trapezoids = exaTrapezoids;
pExaScr->SavedAddTraps = ps->AddTraps;
ps->AddTraps = ExaCheckAddTraps;
}
#endif
#ifdef MITSHM
/*
* Don't allow shared pixmaps.
*/
ShmRegisterFuncs(pScreen, &exaShmFuncs);
#endif
/*
* Hookup offscreen pixmaps
*/
if (pExaScr->info->flags & EXA_OFFSCREEN_PIXMAPS)
{
if (!dixRequestPrivate(exaPixmapPrivateKey, sizeof(ExaPixmapPrivRec))) {
LogMessage(X_WARNING,
"EXA(%d): Failed to allocate pixmap private\n",
pScreen->myNum);
return FALSE;
}
pExaScr->SavedCreatePixmap = pScreen->CreatePixmap;
pScreen->CreatePixmap = exaCreatePixmap;
pExaScr->SavedDestroyPixmap = pScreen->DestroyPixmap;
pScreen->DestroyPixmap = exaDestroyPixmap;
pExaScr->SavedModifyPixmapHeader = pScreen->ModifyPixmapHeader;
pScreen->ModifyPixmapHeader = exaModifyPixmapHeader;
if (!pExaScr->info->CreatePixmap) {
LogMessage(X_INFO, "EXA(%d): Offscreen pixmap area of %lu bytes\n",
pScreen->myNum,
pExaScr->info->memorySize - pExaScr->info->offScreenBase);
} else {
LogMessage(X_INFO, "EXA(%d): Driver allocated offscreen pixmaps\n",
pScreen->myNum);
}
}
else
LogMessage(X_INFO, "EXA(%d): No offscreen pixmaps\n", pScreen->myNum);
if (!pExaScr->info->CreatePixmap) {
DBG_PIXMAP(("============== %ld < %ld\n", pExaScr->info->offScreenBase,
pExaScr->info->memorySize));
if (pExaScr->info->offScreenBase < pExaScr->info->memorySize) {
if (!exaOffscreenInit (pScreen)) {
LogMessage(X_WARNING, "EXA(%d): Offscreen pixmap setup failed\n",
pScreen->myNum);
return FALSE;
}
}
}
if (ps->Glyphs == exaGlyphs)
exaGlyphsInit(pScreen);
LogMessage(X_INFO, "EXA(%d): Driver registered support for the following"
" operations:\n", pScreen->myNum);
assert(pScreenInfo->PrepareSolid != NULL);
LogMessage(X_INFO, " Solid\n");
assert(pScreenInfo->PrepareCopy != NULL);
LogMessage(X_INFO, " Copy\n");
if (pScreenInfo->PrepareComposite != NULL) {
LogMessage(X_INFO, " Composite (RENDER acceleration)\n");
}
if (pScreenInfo->UploadToScreen != NULL) {
LogMessage(X_INFO, " UploadToScreen\n");
}
if (pScreenInfo->DownloadFromScreen != NULL) {
LogMessage(X_INFO, " DownloadFromScreen\n");
}
return TRUE;
}
/**
* exaDriverFini tears down EXA on a given screen.
*
* @param pScreen screen being torn down.
*/
void
exaDriverFini (ScreenPtr pScreen)
{
/*right now does nothing*/
}
/**
* exaMarkSync() should be called after any asynchronous drawing by the hardware.
*
* @param pScreen screen which drawing occurred on
*
* exaMarkSync() sets a flag to indicate that some asynchronous drawing has
* happened and a WaitSync() will be necessary before relying on the contents of
* offscreen memory from the CPU's perspective. It also calls an optional
* driver MarkSync() callback, the return value of which may be used to do partial
* synchronization with the hardware in the future.
*/
void exaMarkSync(ScreenPtr pScreen)
{
ExaScreenPriv(pScreen);
pExaScr->info->needsSync = TRUE;
if (pExaScr->info->MarkSync != NULL) {
pExaScr->info->lastMarker = (*pExaScr->info->MarkSync)(pScreen);
}
}
/**
* exaWaitSync() ensures that all drawing has been completed.
*
* @param pScreen screen being synchronized.
*
* Calls down into the driver to ensure that all previous drawing has completed.
* It should always be called before relying on the framebuffer contents
* reflecting previous drawing, from a CPU perspective.
*/
void exaWaitSync(ScreenPtr pScreen)
{
ExaScreenPriv(pScreen);
if (pExaScr->info->needsSync && !pExaScr->swappedOut) {
(*pExaScr->info->WaitMarker)(pScreen, pExaScr->info->lastMarker);
pExaScr->info->needsSync = FALSE;
}
}
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