[PATCH] pixmap: fix reverse optimus support with multiple heads

[Dave Airlie]

For doing reverese optimus to multiple outputs on a secondary GPU
the GPU can store the blits into a large screen pixmap, unfortunately
this means we need a destination offset into the dirty code, so
add a new API that just adds this interface.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 dix/pixmap.c        | 18 ++++++++++++++----
 include/pixmap.h    |  6 ++++++
 include/pixmapstr.h |  1 +
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/dix/pixmap.c b/dix/pixmap.c
index fe92147..e01d961 100644
--- a/dix/pixmap.c
+++ b/dix/pixmap.c
@@ -164,9 +164,9 @@ PixmapPtr PixmapShareToSlave(PixmapPtr pixmap, ScreenPtr slave)
 }
 
 Bool
-PixmapStartDirtyTracking(PixmapPtr src,
-                         PixmapPtr slave_dst,
-                         int x, int y)
+PixmapStartDirtyTracking2(PixmapPtr src,
+			  PixmapPtr slave_dst,
+			  int x, int y, int dst_x, int dst_y)
 {
     ScreenPtr screen = src->drawable.pScreen;
     PixmapDirtyUpdatePtr dirty_update;
@@ -179,6 +179,8 @@ PixmapStartDirtyTracking(PixmapPtr src,
     dirty_update->slave_dst = slave_dst;
     dirty_update->x = x;
     dirty_update->y = y;
+    dirty_update->dst_x = dst_x;
+    dirty_update->dst_y = dst_y;
 
     dirty_update->damage = DamageCreate(NULL, NULL,
                                         DamageReportNone,
@@ -195,6 +197,14 @@ PixmapStartDirtyTracking(PixmapPtr src,
 }
 
 Bool
+PixmapStartDirtyTracking(PixmapPtr src,
+			 PixmapPtr slave_dst,
+			 int x, int y)
+{
+   return PixmapStartDirtyTracking2(src, slave_dst, x, y, 0, 0);
+}
+
+Bool
 PixmapStopDirtyTracking(PixmapPtr src, PixmapPtr slave_dst)
 {
     ScreenPtr screen = src->drawable.pScreen;
@@ -262,7 +272,7 @@ Bool PixmapSyncDirtyHelper(PixmapDirtyUpdatePtr dirty, RegionPtr dirty_region)
         h = dst_box.y2 - dst_box.y1;
 
         pGC->ops->CopyArea(&dirty->src->drawable, &dst->drawable, pGC,
-                           dirty->x + dst_box.x1, dirty->y + dst_box.y1, w, h, dst_box.x1, dst_box.y1);
+                           dirty->x + dst_box.x1, dirty->y + dst_box.y1, w, h, dirty->dst_x + dst_box.x1, dirty->dst_y + dst_box.y1);
         b++;
     }
     FreeScratchGC(pGC);
diff --git a/include/pixmap.h b/include/pixmap.h
index 921a94d..d7d0a5e 100644
--- a/include/pixmap.h
+++ b/include/pixmap.h
@@ -120,6 +120,12 @@ PixmapStartDirtyTracking(PixmapPtr src,
                          PixmapPtr slave_dst,
                          int x, int y);
 
+#define HAS_DIRTYTRACKING2 1
+extern _X_EXPORT Bool
+PixmapStartDirtyTracking2(PixmapPtr src,
+			  PixmapPtr slave_dst,
+			  int x, int y, int dst_x, int dst_y);
+
 extern _X_EXPORT Bool
 PixmapStopDirtyTracking(PixmapPtr src, PixmapPtr slave_dst);
 
diff --git a/include/pixmapstr.h b/include/pixmapstr.h
index 2a1ef9b..2bdff98 100644
--- a/include/pixmapstr.h
+++ b/include/pixmapstr.h
@@ -90,6 +90,7 @@ typedef struct _PixmapDirtyUpdate {
     int x, y;
     DamagePtr damage;
     struct xorg_list ent;
+    int dst_x, dst_y;
 } PixmapDirtyUpdateRec;
 
 static inline void
-- 
1.8.2.1