1 files changed, 19 insertions, 12 deletions

diff --git a/src/mesa/drivers/dri/unichrome/via_context.c b/src/mesa/drivers/dri/unichrome/via_context.c
index 89533421b46..4d25d328e33 100644
--- a/src/mesa/drivers/dri/unichrome/via_context.c
+++ b/src/mesa/drivers/dri/unichrome/via_context.c
@@ -768,9 +768,7 @@ void viaXMesaWindowMoved(struct via_context *vmesa)
 				  drawable);
    }
 
-   draw_buffer->drawXoff = (GLuint)(((drawable->x * bytePerPixel) & 0x1f) / 
-			      bytePerPixel);  
-   draw_buffer->drawX = drawable->x - draw_buffer->drawXoff;
+   draw_buffer->drawX = drawable->x;
    draw_buffer->drawY = drawable->y;
    draw_buffer->drawW = drawable->w;
    draw_buffer->drawH = drawable->h;
@@ -782,9 +780,7 @@ void viaXMesaWindowMoved(struct via_context *vmesa)
 				     readable);
       }
 
-      read_buffer->drawXoff = (GLuint)(((readable->x * bytePerPixel) & 0x1f) / 
-				       bytePerPixel);  
-      read_buffer->drawX = readable->x - read_buffer->drawXoff;
+      read_buffer->drawX = readable->x;
       read_buffer->drawY = readable->y;
       read_buffer->drawW = readable->w;
       read_buffer->drawH = readable->h;
@@ -795,13 +791,24 @@ void viaXMesaWindowMoved(struct via_context *vmesa)
 			draw_buffer->drawX * bytePerPixel);
 
    vmesa->front.origMap = (vmesa->front.map + 
-			   draw_buffer->drawY * vmesa->front.pitch + 
-			   draw_buffer->drawX * bytePerPixel);
+			draw_buffer->drawY * vmesa->front.pitch + 
+			draw_buffer->drawX * bytePerPixel);
+
+   vmesa->back.orig = (vmesa->back.offset +
+			draw_buffer->drawY * vmesa->back.pitch +
+			draw_buffer->drawX * bytePerPixel);
 
-   vmesa->back.orig = vmesa->back.offset;
-   vmesa->depth.orig = vmesa->depth.offset;   
-   vmesa->back.origMap = vmesa->back.map;
-   vmesa->depth.origMap = vmesa->depth.map;
+   vmesa->back.origMap = (vmesa->back.map +
+			draw_buffer->drawY * vmesa->back.pitch +
+			draw_buffer->drawX * bytePerPixel);
+
+   vmesa->depth.orig = (vmesa->depth.offset +
+			draw_buffer->drawY * vmesa->depth.pitch +
+			draw_buffer->drawX * bytePerPixel);   
+
+   vmesa->depth.origMap = (vmesa->depth.map +
+			draw_buffer->drawY * vmesa->depth.pitch +
+			draw_buffer->drawX * bytePerPixel);
 
    viaCalcViewport(vmesa->glCtx);
 }