[patch] Potential fix

neomagic.patch (text/plain), 3.06 KB, created by Matt Turner on 2012-09-11 22:46:25 UTC

diff --git a/src/neo.h b/src/neo.h
index 6812e7a..1e44542 100644
--- a/src/neo.h
+++ b/src/neo.h
@@ -257,6 +257,7 @@ typedef struct neoRec
     NeoRegRec NeoSavedReg;
     /* proc pointer */
     CloseScreenProcPtr CloseScreen;
+    CreateScreenResourcesProcPtr CreateScreenResources;
     I2CBusPtr I2C;
     vbeInfoPtr          pVbe;
     unsigned char * ShadowPtr;
@@ -273,6 +274,9 @@ typedef struct neoRec
     int overlay_offset;
     int videoKey;
     int interlace;
+    void *shadow;
+    ShadowUpdateProc update;
+    ShadowWindowProc window;
 } NEORec, *NEOPtr;
 
 typedef struct {
diff --git a/src/neo_driver.c b/src/neo_driver.c
index ce89ce0..df8e51d 100644
--- a/src/neo_driver.c
+++ b/src/neo_driver.c
@@ -1404,6 +1404,23 @@ NEOLoadPalette(
    } 
 }
 
+static Bool
+NEOCreateScreenResources(ScreenPtr pScreen)
+{
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    NEOPtr nPtr = NEOPTR(pScrn);
+    Bool ret;
+
+    pScreen->CreateScreenResources = nPtr->CreateScreenResources;
+    ret = pScreen->CreateScreenResources(pScreen);
+    pScreen->CreateScreenResources = NEOCreateScreenResources;
+
+    shadowAdd(pScreen, pScreen->GetScreenPixmap(pScreen), nPtr->update,
+	      nPtr->window, 0, 0);
+
+    return ret;
+}
+
 /* Mandatory */
 static Bool
 NEOScreenInit(SCREEN_INIT_ARGS_DECL)
@@ -1438,7 +1455,17 @@ NEOScreenInit(SCREEN_INIT_ARGS_DECL)
     /* Map the Neo memory and possible MMIO areas */
     if (!neoMapMem(pScrn))
 	return FALSE;
-    
+
+    if (nPtr->shadowFB) {
+	nPtr->shadow = calloc(1, pScrn->displayWidth * pScrn->virtualY *
+				  ((pScrn->bitsPerPixel + 7) / 8));
+	if (!nPtr->shadow) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		       "Failed to allocate shadow buffer\n");
+	    return FALSE;
+	}
+    }
+
     /*
      * next we save the current state and setup the first mode
      */
@@ -1485,7 +1512,7 @@ NEOScreenInit(SCREEN_INIT_ARGS_DECL)
 	FBStart = nPtr->NeoFbBase;
     }
 
-    ret = fbScreenInit(pScreen, FBStart,
+    ret = fbScreenInit(pScreen, nPtr->shadowFB ? nPtr->shadow : FBStart,
 			    width, height,
 			    pScrn->xDpi, pScrn->yDpi,
 			    displayWidth, pScrn->bitsPerPixel);
@@ -1655,7 +1682,10 @@ NEOScreenInit(SCREEN_INIT_ARGS_DECL)
 #if 0
 	ShadowFBInit(pScreen, nPtr->refreshArea);
 #else
-	shadowInit (pScreen, neoShadowUpdate, 0);
+	if (!shadowSetup(pScreen))
+	    return FALSE;
+	nPtr->CreateScreenResources = pScreen->CreateScreenResources;
+	pScreen->CreateScreenResources = NEOCreateScreenResources;
 #endif
     }
     
@@ -1785,6 +1815,10 @@ NEOCloseScreen(CLOSE_SCREEN_ARGS_DECL)
 	neoLock(pScrn);
 	neoUnmapMem(pScrn);
     }
+    if (nPtr->shadowFB && nPtr->shadow) {
+	shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
+	free(nPtr->shadow);
+    }
 #ifdef HAVE_XAA_H
     if (nPtr->AccelInfoRec)
 	XAADestroyInfoRec(nPtr->AccelInfoRec);
@@ -1795,6 +1829,7 @@ NEOCloseScreen(CLOSE_SCREEN_ARGS_DECL)
 	free(nPtr->ShadowPtr);
 
     pScrn->vtSema = FALSE;
+    pScreen->CreateScreenResources = nPtr->CreateScreenResources;
     pScreen->CloseScreen = nPtr->CloseScreen;
     return (*pScreen->CloseScreen)(CLOSE_SCREEN_ARGS);
 }