Mesa (master): r300: fix Y coord flipping in accelerated blits

Maciej Cencora osiris at kemper.freedesktop.org
Tue Jan 19 15:40:57 PST 2010


Module: Mesa
Branch: master
Commit: f2fea26269ac6b386f78fb68168fade4ae3290df
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f2fea26269ac6b386f78fb68168fade4ae3290df

Author: Maciej Cencora <m.cencora at gmail.com>
Date:   Sat Jan 16 14:53:07 2010 +0100

r300: fix Y coord flipping in accelerated blits

---

 src/mesa/drivers/dri/r300/r300_blit.c |   13 ++++++-------
 1 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/mesa/drivers/dri/r300/r300_blit.c b/src/mesa/drivers/dri/r300/r300_blit.c
index 37e3f8a..8a9c1c8 100644
--- a/src/mesa/drivers/dri/r300/r300_blit.c
+++ b/src/mesa/drivers/dri/r300/r300_blit.c
@@ -403,9 +403,8 @@ static void calc_tex_coords(float img_width, float img_height,
     buf[3] = buf[2] + reg_height / img_height;
     if (flip_y)
     {
-        float tmp = buf[2];
-        buf[2] = 1.0 - buf[3];
-        buf[3] = 1.0 - tmp;
+        buf[2] = 1.0 - buf[2];
+        buf[3] = 1.0 - buf[3];
     }
 }
 
@@ -424,13 +423,13 @@ static void emit_draw_packet(struct r300_context *r300,
                     flip_y, texcoords);
 
     float verts[] = { dst_x_offset, dst_y_offset,
-                      texcoords[0], texcoords[3],
-                      dst_x_offset, dst_y_offset + reg_height,
                       texcoords[0], texcoords[2],
+                      dst_x_offset, dst_y_offset + reg_height,
+                      texcoords[0], texcoords[3],
                       dst_x_offset + reg_width, dst_y_offset + reg_height,
-                      texcoords[1], texcoords[2],
+                      texcoords[1], texcoords[3],
                       dst_x_offset + reg_width, dst_y_offset,
-                      texcoords[1], texcoords[3] };
+                      texcoords[1], texcoords[2] };
 
     BATCH_LOCALS(&r300->radeon);
 



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