1 files changed, 15 insertions, 12 deletions

diff --git a/xc/extras/Mesa/src/swrast/s_readpix.c b/xc/extras/Mesa/src/swrast/s_readpix.c
index 666baa286..672109982 100644
--- a/xc/extras/Mesa/src/swrast/s_readpix.c
+++ b/xc/extras/Mesa/src/swrast/s_readpix.c
@@ -1,8 +1,7 @@
-/* $Id: s_readpix.c,v 1.1.1.1 2002/10/22 13:06:56 alanh Exp $ */
 
 /*
  * Mesa 3-D graphics library
- * Version:  4.0.3
+ * Version:  4.1
  *
  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
  *
@@ -32,7 +31,7 @@
 #include "feedback.h"
 #include "image.h"
 #include "macros.h"
-#include "mem.h"
+#include "imports.h"
 #include "pixel.h"
 
 #include "s_alphabuf.h"
@@ -62,9 +61,7 @@ read_index_pixels( GLcontext *ctx,
       return;
    }
 
-   ASSERT(swrast->Driver.SetReadBuffer);
-   (*swrast->Driver.SetReadBuffer)(ctx, ctx->ReadBuffer,
-                                ctx->Pixel.DriverReadBuffer);
+   _swrast_use_read_buffer(ctx);
 
    readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
 
@@ -82,8 +79,7 @@ read_index_pixels( GLcontext *ctx,
                             &ctx->Pack, ctx->_ImageTransferState);
    }
 
-   (*swrast->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer,
-                                ctx->Color.DriverDrawBuffer);
+   _swrast_use_draw_buffer(ctx);
 }
 
 
@@ -282,8 +278,15 @@ read_fast_rgba_pixels( GLcontext *ctx,
       if (0) {
 #endif
          GLchan *dest = (GLchan *) pixels
-                         + (skipRows * rowLength + skipPixels) * 4;
+                      + (skipRows * rowLength + skipPixels) * 4;
          GLint row;
+
+         if (packing->Invert) {
+            /* start at top and go down */
+            dest += (readHeight - 1) * rowLength * 4;
+            rowLength = -rowLength;
+         }
+
          for (row=0; row<readHeight; row++) {
             (*swrast->Driver.ReadRGBASpan)(ctx, readWidth, srcX, srcY,
                                         (GLchan (*)[4]) dest);
@@ -318,13 +321,13 @@ read_rgba_pixels( GLcontext *ctx,
    SWcontext *swrast = SWRAST_CONTEXT(ctx);
    GLint readWidth;
 
-   (*swrast->Driver.SetReadBuffer)(ctx, ctx->ReadBuffer, ctx->Pixel.DriverReadBuffer);
+   _swrast_use_read_buffer(ctx);
 
    /* Try optimized path first */
    if (read_fast_rgba_pixels( ctx, x, y, width, height,
                               format, type, pixels, packing )) {
 
-      (*swrast->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer, ctx->Color.DriverDrawBuffer);
+      _swrast_use_draw_buffer(ctx);
       return; /* done! */
    }
 
@@ -470,7 +473,7 @@ read_rgba_pixels( GLcontext *ctx,
       }
    }
 
-   (*swrast->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer, ctx->Color.DriverDrawBuffer);
+   _swrast_use_draw_buffer(ctx);
 }