From: Brian <brian.paul@tungstengraphics.com>
Date: Thu, 20 Mar 2008 20:20:25 +0000 (-0600)
Subject: gallium: Y-invert blit depending on framebuffer orientation
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3aa8c660ffa9763dbdfdf2d75e991a08e41c29b6;p=mesa.git

gallium: Y-invert blit depending on framebuffer orientation
---

diff --git a/src/mesa/state_tracker/st_cb_blit.c b/src/mesa/state_tracker/st_cb_blit.c
index 64314a5078f..63211d8b66e 100644
--- a/src/mesa/state_tracker/st_cb_blit.c
+++ b/src/mesa/state_tracker/st_cb_blit.c
@@ -85,11 +85,14 @@ st_BlitFramebuffer(GLcontext *ctx,
       struct pipe_surface *srcSurf = srcRb->surface;
       struct pipe_surface *dstSurf = dstRb->surface;
 
-      srcY0 = srcRb->Base.Height - srcY0;
-      srcY1 = srcRb->Base.Height - srcY1;
-
-      dstY0 = dstRb->Base.Height - dstY0;
-      dstY1 = dstRb->Base.Height - dstY1;
+      if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
+         /* invert Y */
+         srcY0 = srcRb->Base.Height - srcY0;
+         srcY1 = srcRb->Base.Height - srcY1;
+
+         dstY0 = dstRb->Base.Height - dstY0;
+         dstY1 = dstRb->Base.Height - dstY1;
+      }
 
       util_blit_pixels(st->blit,
                        srcSurf, srcX0, srcY0, srcX1, srcY1,