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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 <X11/fonts/fontstruct.h>
+#include "dixfontstr.h"
+#include "exa.h"
+#include "cw.h"
+
+DevPrivateKey exaScreenPrivateKey = &exaScreenPrivateKey;
+DevPrivateKey exaPixmapPrivateKey = &exaPixmapPrivateKey;
+
+#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 ((unsigned long)ExaGetPixmapAddress(pPix) -
+ (unsigned long)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)
+ 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;
+
+ 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;
+ } 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;
+ }
+ }
+
+ pExaPixmap->area = 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);
+ DamageSetReportAfterOp (pExaPixmap->pDamage, TRUE);
+
+ /* 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;
+}
+
+void
+exaPrepareAccessWindow(WindowPtr pWin)
+{
+ if (pWin->backgroundState == BackgroundPixmap)
+ exaPrepareAccess(&pWin->background.pixmap->drawable, EXA_PREPARE_SRC);
+
+ if (pWin->borderIsPixel == FALSE)
+ exaPrepareAccess(&pWin->border.pixmap->drawable, EXA_PREPARE_SRC);
+}
+
+void
+exaFinishAccessWindow(WindowPtr pWin)
+{
+ if (pWin->backgroundState == BackgroundPixmap)
+ exaFinishAccess(&pWin->background.pixmap->drawable, EXA_PREPARE_SRC);
+
+ if (pWin->borderIsPixel == FALSE)
+ exaFinishAccess(&pWin->border.pixmap->drawable, EXA_PREPARE_SRC);
+}
+
+static Bool
+exaChangeWindowAttributes(WindowPtr pWin, unsigned long mask)
+{
+ Bool ret;
+
+ exaPrepareAccessWindow(pWin);
+ ret = fbChangeWindowAttributes(pWin, mask);
+ exaFinishAccessWindow(pWin);
+ 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
+
+ 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->Trapezoids = pExaScr->SavedTrapezoids;
+ 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;
+
+ 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;
+ }
+ }
+ }
+
+ 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;
+ }
+}