Bugzilla #4616:

- Merge various fb/ bits of COMPOSITE support from xserver, which weren't
    necessary before due to cw hiding the issues. Fixes offset calculations
    for a number of operations, and may pull some fixes that cairo has
    wanted for XAA as well.
- Add a new call, miDisableCompositeWrapper(), which a DDX can call to keep
    cw from getting initialized from the damage code. While it would be
    cleaner to have each DDX initialize it if it needs it, we don't have
    control over all of them (e.g. nvidia).
- Use the miDisableCompositeWrapper() to keep cw from getting set up for
    screens using EXA, because EXA is already aware of composite. Avoiding
    cw improved performance 0-35% on operations tested by ajax in x11perf.

3 files changed, 24 insertions, 21 deletions

diff --git a/exa/exa.c b/exa/exa.c
index b7ba3b319..fb46f4449 100644
--- a/exa/exa.c
+++ b/exa/exa.c
@@ -31,6 +31,7 @@
 #include "xf86str.h"
 #include "xf86.h"
 #include "exa.h"
+#include "cw.h"
 
 #if DEBUG_MIGRATE
 #define DBG_MIGRATE(a) ErrorF a
@@ -1232,19 +1233,17 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
     {
 	int nbox = REGION_NUM_RECTS (pRegion);
 	BoxPtr pBox = REGION_RECTS (pRegion);
-	int xRot = pDrawable->x + xoff;
-	int yRot = pDrawable->y + yoff;
 
 	while (nbox--)
 	{
 	    int height = pBox->y2 - pBox->y1;
-	    int dstY = pBox->y1 + yoff;
+	    int dstY = pBox->y1;
 	    int tileY;
 
-	    modulus (dstY - yRot, tileHeight, tileY);
+	    tileY = (dstY - pDrawable->y) % tileHeight;
 	    while (height > 0) {
 		int width = pBox->x2 - pBox->x1;
-		int dstX = pBox->x1 + xoff;
+		int dstX = pBox->x1;
 		int tileX;
 		int h = tileHeight - tileY;
 
@@ -1252,7 +1251,7 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
 		    h = height;
 		height -= h;
 
-		modulus (dstX - xRot, tileWidth, tileX);
+		tileX = (dstX - pDrawable->x) % tileWidth;
 		while (width > 0) {
 		    int w = tileWidth - tileX;
 		    if (w > width)
@@ -1261,7 +1260,7 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
 
 		    (*pExaScr->info->accel.Copy) (pPixmap,
 						  tileX, tileY,
-						  dstX, dstY,
+						  dstX + xoff, dstY + yoff,
 						  w, h);
 		    dstX += w;
 		    tileX = 0;
@@ -1428,6 +1427,8 @@ exaDriverInit (ScreenPtr		pScreen,
     }
 #endif
 
+    miDisableCompositeWrapper(pScreen);
+
     /*
      * Hookup offscreen pixmaps
      */
diff --git a/exa/exa_accel.c b/exa/exa_accel.c
index b7ba3b319..fb46f4449 100644
--- a/exa/exa_accel.c
+++ b/exa/exa_accel.c
@@ -31,6 +31,7 @@
 #include "xf86str.h"
 #include "xf86.h"
 #include "exa.h"
+#include "cw.h"
 
 #if DEBUG_MIGRATE
 #define DBG_MIGRATE(a) ErrorF a
@@ -1232,19 +1233,17 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
     {
 	int nbox = REGION_NUM_RECTS (pRegion);
 	BoxPtr pBox = REGION_RECTS (pRegion);
-	int xRot = pDrawable->x + xoff;
-	int yRot = pDrawable->y + yoff;
 
 	while (nbox--)
 	{
 	    int height = pBox->y2 - pBox->y1;
-	    int dstY = pBox->y1 + yoff;
+	    int dstY = pBox->y1;
 	    int tileY;
 
-	    modulus (dstY - yRot, tileHeight, tileY);
+	    tileY = (dstY - pDrawable->y) % tileHeight;
 	    while (height > 0) {
 		int width = pBox->x2 - pBox->x1;
-		int dstX = pBox->x1 + xoff;
+		int dstX = pBox->x1;
 		int tileX;
 		int h = tileHeight - tileY;
 
@@ -1252,7 +1251,7 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
 		    h = height;
 		height -= h;
 
-		modulus (dstX - xRot, tileWidth, tileX);
+		tileX = (dstX - pDrawable->x) % tileWidth;
 		while (width > 0) {
 		    int w = tileWidth - tileX;
 		    if (w > width)
@@ -1261,7 +1260,7 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
 
 		    (*pExaScr->info->accel.Copy) (pPixmap,
 						  tileX, tileY,
-						  dstX, dstY,
+						  dstX + xoff, dstY + yoff,
 						  w, h);
 		    dstX += w;
 		    tileX = 0;
@@ -1428,6 +1427,8 @@ exaDriverInit (ScreenPtr		pScreen,
     }
 #endif
 
+    miDisableCompositeWrapper(pScreen);
+
     /*
      * Hookup offscreen pixmaps
      */
diff --git a/exa/exa_migration.c b/exa/exa_migration.c
index b7ba3b319..fb46f4449 100644
--- a/exa/exa_migration.c
+++ b/exa/exa_migration.c
@@ -31,6 +31,7 @@
 #include "xf86str.h"
 #include "xf86.h"
 #include "exa.h"
+#include "cw.h"
 
 #if DEBUG_MIGRATE
 #define DBG_MIGRATE(a) ErrorF a
@@ -1232,19 +1233,17 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
     {
 	int nbox = REGION_NUM_RECTS (pRegion);
 	BoxPtr pBox = REGION_RECTS (pRegion);
-	int xRot = pDrawable->x + xoff;
-	int yRot = pDrawable->y + yoff;
 
 	while (nbox--)
 	{
 	    int height = pBox->y2 - pBox->y1;
-	    int dstY = pBox->y1 + yoff;
+	    int dstY = pBox->y1;
 	    int tileY;
 
-	    modulus (dstY - yRot, tileHeight, tileY);
+	    tileY = (dstY - pDrawable->y) % tileHeight;
 	    while (height > 0) {
 		int width = pBox->x2 - pBox->x1;
-		int dstX = pBox->x1 + xoff;
+		int dstX = pBox->x1;
 		int tileX;
 		int h = tileHeight - tileY;
 
@@ -1252,7 +1251,7 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
 		    h = height;
 		height -= h;
 
-		modulus (dstX - xRot, tileWidth, tileX);
+		tileX = (dstX - pDrawable->x) % tileWidth;
 		while (width > 0) {
 		    int w = tileWidth - tileX;
 		    if (w > width)
@@ -1261,7 +1260,7 @@ exaFillRegionTiled (DrawablePtr	pDrawable,
 
 		    (*pExaScr->info->accel.Copy) (pPixmap,
 						  tileX, tileY,
-						  dstX, dstY,
+						  dstX + xoff, dstY + yoff,
 						  w, h);
 		    dstX += w;
 		    tileX = 0;
@@ -1428,6 +1427,8 @@ exaDriverInit (ScreenPtr		pScreen,
     }
 #endif
 
+    miDisableCompositeWrapper(pScreen);
+
     /*
      * Hookup offscreen pixmaps
      */