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xserver-multidpi/hw/xfree86/ramdac/xf86Cursor.c
Michael Thayer 901fbfbbbd Add a return value to load_cursor_argb() to allow it to report failure 
load_cursor_argb() may need to be able to fail and have the server fall back
to a software cursor in at least the following circumstances.
1) The hardware can only support some ARGB cursors and this does not just
depend on cursor size.
2) Virtual hardware may not wish to pass through a cursor to the host at a
particular time but may wish to accept the same cursor at another time.
This patch adds a return value to the API and makes the server do the
software fall-back on failure.

Signed-off-by: Michael Thayer <michael.thayer@oracle.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
2014-04-03 16:46:55 -07:00

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#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include "xf86.h"
#include "xf86CursorPriv.h"
#include "colormapst.h"
#include "cursorstr.h"
/* FIXME: This was added with the ABI change of the miPointerSpriteFuncs for
* MPX.
* inputInfo is needed to pass the core pointer as the default argument into
* the cursor functions.
*
* Externing inputInfo is not the nice way to do it but it works.
*/
#include "inputstr.h"
DevPrivateKeyRec xf86CursorScreenKeyRec;
/* sprite functions */
static Bool xf86CursorRealizeCursor(DeviceIntPtr, ScreenPtr, CursorPtr);
static Bool xf86CursorUnrealizeCursor(DeviceIntPtr, ScreenPtr, CursorPtr);
static void xf86CursorSetCursor(DeviceIntPtr, ScreenPtr, CursorPtr, int, int);
static void xf86CursorMoveCursor(DeviceIntPtr, ScreenPtr, int, int);
static Bool xf86DeviceCursorInitialize(DeviceIntPtr, ScreenPtr);
static void xf86DeviceCursorCleanup(DeviceIntPtr, ScreenPtr);
static miPointerSpriteFuncRec xf86CursorSpriteFuncs = {
xf86CursorRealizeCursor,
xf86CursorUnrealizeCursor,
xf86CursorSetCursor,
xf86CursorMoveCursor,
xf86DeviceCursorInitialize,
xf86DeviceCursorCleanup
};
/* Screen functions */
static void xf86CursorInstallColormap(ColormapPtr);
static void xf86CursorRecolorCursor(DeviceIntPtr pDev, ScreenPtr, CursorPtr,
Bool);
static Bool xf86CursorCloseScreen(ScreenPtr);
static void xf86CursorQueryBestSize(int, unsigned short *, unsigned short *,
ScreenPtr);
/* ScrnInfoRec functions */
static void xf86CursorEnableDisableFBAccess(ScrnInfoPtr, Bool);
static Bool xf86CursorSwitchMode(ScrnInfoPtr, DisplayModePtr);
Bool
xf86InitCursor(ScreenPtr pScreen, xf86CursorInfoPtr infoPtr)
{
ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
xf86CursorScreenPtr ScreenPriv;
miPointerScreenPtr PointPriv;
if (!xf86InitHardwareCursor(pScreen, infoPtr))
return FALSE;
if (!dixRegisterPrivateKey(&xf86CursorScreenKeyRec, PRIVATE_SCREEN, 0))
return FALSE;
ScreenPriv = calloc(1, sizeof(xf86CursorScreenRec));
if (!ScreenPriv)
return FALSE;
dixSetPrivate(&pScreen->devPrivates, xf86CursorScreenKey, ScreenPriv);
ScreenPriv->SWCursor = TRUE;
ScreenPriv->isUp = FALSE;
ScreenPriv->CurrentCursor = NULL;
ScreenPriv->CursorInfoPtr = infoPtr;
ScreenPriv->PalettedCursor = FALSE;
ScreenPriv->pInstalledMap = NULL;
ScreenPriv->CloseScreen = pScreen->CloseScreen;
pScreen->CloseScreen = xf86CursorCloseScreen;
ScreenPriv->QueryBestSize = pScreen->QueryBestSize;
pScreen->QueryBestSize = xf86CursorQueryBestSize;
ScreenPriv->RecolorCursor = pScreen->RecolorCursor;
pScreen->RecolorCursor = xf86CursorRecolorCursor;
if ((infoPtr->pScrn->bitsPerPixel == 8) &&
!(infoPtr->Flags & HARDWARE_CURSOR_TRUECOLOR_AT_8BPP)) {
ScreenPriv->InstallColormap = pScreen->InstallColormap;
pScreen->InstallColormap = xf86CursorInstallColormap;
ScreenPriv->PalettedCursor = TRUE;
}
PointPriv = dixLookupPrivate(&pScreen->devPrivates, miPointerScreenKey);
ScreenPriv->showTransparent = PointPriv->showTransparent;
if (infoPtr->Flags & HARDWARE_CURSOR_SHOW_TRANSPARENT)
PointPriv->showTransparent = TRUE;
else
PointPriv->showTransparent = FALSE;
ScreenPriv->spriteFuncs = PointPriv->spriteFuncs;
PointPriv->spriteFuncs = &xf86CursorSpriteFuncs;
ScreenPriv->EnableDisableFBAccess = pScrn->EnableDisableFBAccess;
ScreenPriv->SwitchMode = pScrn->SwitchMode;
ScreenPriv->ForceHWCursorCount = 0;
ScreenPriv->HWCursorForced = FALSE;
pScrn->EnableDisableFBAccess = xf86CursorEnableDisableFBAccess;
if (pScrn->SwitchMode)
pScrn->SwitchMode = xf86CursorSwitchMode;
return TRUE;
}
/***** Screen functions *****/
static Bool
xf86CursorCloseScreen(ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
miPointerScreenPtr PointPriv =
(miPointerScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
miPointerScreenKey);
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (ScreenPriv->isUp && pScrn->vtSema)
xf86SetCursor(pScreen, NullCursor, ScreenPriv->x, ScreenPriv->y);
if (ScreenPriv->CurrentCursor)
FreeCursor(ScreenPriv->CurrentCursor, None);
pScreen->CloseScreen = ScreenPriv->CloseScreen;
pScreen->QueryBestSize = ScreenPriv->QueryBestSize;
pScreen->RecolorCursor = ScreenPriv->RecolorCursor;
if (ScreenPriv->InstallColormap)
pScreen->InstallColormap = ScreenPriv->InstallColormap;
PointPriv->spriteFuncs = ScreenPriv->spriteFuncs;
PointPriv->showTransparent = ScreenPriv->showTransparent;
pScrn->EnableDisableFBAccess = ScreenPriv->EnableDisableFBAccess;
pScrn->SwitchMode = ScreenPriv->SwitchMode;
free(ScreenPriv->transparentData);
free(ScreenPriv);
return (*pScreen->CloseScreen) (pScreen);
}
static void
xf86CursorQueryBestSize(int class,
unsigned short *width,
unsigned short *height, ScreenPtr pScreen)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (class == CursorShape) {
if (*width > ScreenPriv->CursorInfoPtr->MaxWidth)
*width = ScreenPriv->CursorInfoPtr->MaxWidth;
if (*height > ScreenPriv->CursorInfoPtr->MaxHeight)
*height = ScreenPriv->CursorInfoPtr->MaxHeight;
}
else
(*ScreenPriv->QueryBestSize) (class, width, height, pScreen);
}
static void
xf86CursorInstallColormap(ColormapPtr pMap)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pMap->pScreen->devPrivates,
xf86CursorScreenKey);
ScreenPriv->pInstalledMap = pMap;
(*ScreenPriv->InstallColormap) (pMap);
}
static void
xf86CursorRecolorCursor(DeviceIntPtr pDev,
ScreenPtr pScreen, CursorPtr pCurs, Bool displayed)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (!displayed)
return;
if (ScreenPriv->SWCursor)
(*ScreenPriv->RecolorCursor) (pDev, pScreen, pCurs, displayed);
else
xf86RecolorCursor(pScreen, pCurs, displayed);
}
/***** ScrnInfoRec functions *********/
static void
xf86CursorEnableDisableFBAccess(ScrnInfoPtr pScrn, Bool enable)
{
DeviceIntPtr pDev = inputInfo.pointer;
ScreenPtr pScreen = xf86ScrnToScreen(pScrn);
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (!enable && ScreenPriv->CurrentCursor != NullCursor) {
CursorPtr currentCursor = ScreenPriv->CurrentCursor;
xf86CursorSetCursor(pDev, pScreen, NullCursor, ScreenPriv->x,
ScreenPriv->y);
ScreenPriv->isUp = FALSE;
ScreenPriv->SWCursor = TRUE;
ScreenPriv->SavedCursor = currentCursor;
}
if (ScreenPriv->EnableDisableFBAccess)
(*ScreenPriv->EnableDisableFBAccess) (pScrn, enable);
if (enable && ScreenPriv->SavedCursor) {
/*
* Re-set current cursor so drivers can react to FB access having been
* temporarily disabled.
*/
xf86CursorSetCursor(pDev, pScreen, ScreenPriv->SavedCursor,
ScreenPriv->x, ScreenPriv->y);
ScreenPriv->SavedCursor = NULL;
}
}
static Bool
xf86CursorSwitchMode(ScrnInfoPtr pScrn, DisplayModePtr mode)
{
Bool ret;
ScreenPtr pScreen = xf86ScrnToScreen(pScrn);
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (ScreenPriv->isUp) {
xf86SetCursor(pScreen, NullCursor, ScreenPriv->x, ScreenPriv->y);
ScreenPriv->isUp = FALSE;
}
ret = (*ScreenPriv->SwitchMode) (pScrn, mode);
/*
* Cannot restore cursor here because the new frame[XY][01] haven't been
* calculated yet. However, because the hardware cursor was removed above,
* ensure the cursor is repainted by miPointerWarpCursor().
*/
ScreenPriv->CursorToRestore = ScreenPriv->CurrentCursor;
miPointerSetWaitForUpdate(pScreen, FALSE); /* Force cursor repaint */
return ret;
}
/****** miPointerSpriteFunctions *******/
static Bool
xf86CursorRealizeCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCurs)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (CursorRefCount(pCurs) <= 1)
dixSetScreenPrivate(&pCurs->devPrivates, CursorScreenKey, pScreen,
NULL);
return (*ScreenPriv->spriteFuncs->RealizeCursor) (pDev, pScreen, pCurs);
}
static Bool
xf86CursorUnrealizeCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCurs)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (CursorRefCount(pCurs) <= 1) {
free(dixLookupScreenPrivate
(&pCurs->devPrivates, CursorScreenKey, pScreen));
dixSetScreenPrivate(&pCurs->devPrivates, CursorScreenKey, pScreen,
NULL);
}
return (*ScreenPriv->spriteFuncs->UnrealizeCursor) (pDev, pScreen, pCurs);
}
static void
xf86CursorSetCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCurs,
int x, int y)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
xf86CursorInfoPtr infoPtr = ScreenPriv->CursorInfoPtr;
if (pCurs == NullCursor) { /* means we're supposed to remove the cursor */
if (ScreenPriv->SWCursor ||
!(GetMaster(pDev, MASTER_POINTER) == inputInfo.pointer))
(*ScreenPriv->spriteFuncs->SetCursor) (pDev, pScreen, NullCursor, x,
y);
else if (ScreenPriv->isUp) {
xf86SetCursor(pScreen, NullCursor, x, y);
ScreenPriv->isUp = FALSE;
}
if (ScreenPriv->CurrentCursor)
FreeCursor(ScreenPriv->CurrentCursor, None);
ScreenPriv->CurrentCursor = NullCursor;
return;
}
/* only update for VCP, otherwise we get cursor jumps when removing a
sprite. The second cursor is never HW rendered anyway. */
if (GetMaster(pDev, MASTER_POINTER) == inputInfo.pointer) {
CursorPtr cursor = RefCursor(pCurs);
if (ScreenPriv->CurrentCursor)
FreeCursor(ScreenPriv->CurrentCursor, None);
ScreenPriv->CurrentCursor = cursor;
ScreenPriv->x = x;
ScreenPriv->y = y;
ScreenPriv->CursorToRestore = NULL;
ScreenPriv->HotX = cursor->bits->xhot;
ScreenPriv->HotY = cursor->bits->yhot;
if (!infoPtr->pScrn->vtSema)
ScreenPriv->SavedCursor = cursor;
if (infoPtr->pScrn->vtSema && xorg_list_is_empty(&pScreen->pixmap_dirty_list) &&
(ScreenPriv->ForceHWCursorCount ||
((
#ifdef ARGB_CURSOR
cursor->bits->argb &&
infoPtr->UseHWCursorARGB &&
(*infoPtr->UseHWCursorARGB)(pScreen, cursor)) ||
(cursor->bits->argb == 0 &&
#endif
(cursor->bits->height <= infoPtr->MaxHeight) &&
(cursor->bits->width <= infoPtr->MaxWidth) &&
(!infoPtr->UseHWCursor || (*infoPtr->UseHWCursor) (pScreen, cursor)))))) {
if (ScreenPriv->SWCursor) /* remove the SW cursor */
(*ScreenPriv->spriteFuncs->SetCursor) (pDev, pScreen,
NullCursor, x, y);
if (xf86SetCursor(pScreen, cursor, x, y)) {
ScreenPriv->SWCursor = FALSE;
ScreenPriv->isUp = TRUE;
miPointerSetWaitForUpdate(pScreen, !infoPtr->pScrn->silkenMouse);
return;
}
}
miPointerSetWaitForUpdate(pScreen, TRUE);
if (ScreenPriv->isUp) {
/* Remove the HW cursor, or make it transparent */
if (infoPtr->Flags & HARDWARE_CURSOR_SHOW_TRANSPARENT) {
xf86SetTransparentCursor(pScreen);
}
else {
xf86SetCursor(pScreen, NullCursor, x, y);
ScreenPriv->isUp = FALSE;
}
}
if (!ScreenPriv->SWCursor)
ScreenPriv->SWCursor = TRUE;
}
if (pCurs->bits->emptyMask && !ScreenPriv->showTransparent)
pCurs = NullCursor;
(*ScreenPriv->spriteFuncs->SetCursor) (pDev, pScreen, pCurs, x, y);
}
static void
xf86CursorMoveCursor(DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
/* only update coordinate state for first sprite, otherwise we get jumps
when removing a sprite. The second sprite is never HW rendered anyway */
if (GetMaster(pDev, MASTER_POINTER) == inputInfo.pointer) {
ScreenPriv->x = x;
ScreenPriv->y = y;
if (ScreenPriv->CursorToRestore)
xf86CursorSetCursor(pDev, pScreen, ScreenPriv->CursorToRestore, x,
y);
else if (ScreenPriv->SWCursor)
(*ScreenPriv->spriteFuncs->MoveCursor) (pDev, pScreen, x, y);
else if (ScreenPriv->isUp)
xf86MoveCursor(pScreen, x, y);
}
else
(*ScreenPriv->spriteFuncs->MoveCursor) (pDev, pScreen, x, y);
}
void
xf86ForceHWCursor(ScreenPtr pScreen, Bool on)
{
DeviceIntPtr pDev = inputInfo.pointer;
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
if (on) {
if (ScreenPriv->ForceHWCursorCount++ == 0) {
if (ScreenPriv->SWCursor && ScreenPriv->CurrentCursor) {
ScreenPriv->HWCursorForced = TRUE;
xf86CursorSetCursor(pDev, pScreen, ScreenPriv->CurrentCursor,
ScreenPriv->x, ScreenPriv->y);
}
else
ScreenPriv->HWCursorForced = FALSE;
}
}
else {
if (--ScreenPriv->ForceHWCursorCount == 0) {
if (ScreenPriv->HWCursorForced && ScreenPriv->CurrentCursor)
xf86CursorSetCursor(pDev, pScreen, ScreenPriv->CurrentCursor,
ScreenPriv->x, ScreenPriv->y);
}
}
}
xf86CursorInfoPtr
xf86CreateCursorInfoRec(void)
{
return calloc(1, sizeof(xf86CursorInfoRec));
}
void
xf86DestroyCursorInfoRec(xf86CursorInfoPtr infoPtr)
{
free(infoPtr);
}
/**
* New cursor has been created. Do your initalizations here.
*/
static Bool
xf86DeviceCursorInitialize(DeviceIntPtr pDev, ScreenPtr pScreen)
{
int ret;
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
/* Init SW cursor */
ret = (*ScreenPriv->spriteFuncs->DeviceCursorInitialize) (pDev, pScreen);
return ret;
}
/**
* Cursor has been removed. Clean up after yourself.
*/
static void
xf86DeviceCursorCleanup(DeviceIntPtr pDev, ScreenPtr pScreen)
{
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
xf86CursorScreenKey);
/* Clean up SW cursor */
(*ScreenPriv->spriteFuncs->DeviceCursorCleanup) (pDev, pScreen);
}
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