From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Mon, 6 Oct 2008 17:34:01 +0000 (-0600)
Subject: mesa: adjust texcoords for swrast sprite points.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6e34fc0d374263ca40855ba4dcc237d961a79e34;p=mesa.git

mesa: adjust texcoords for swrast sprite points.

Fixes glean pointSprite test w/ software rendering
---

diff --git a/src/mesa/swrast/s_points.c b/src/mesa/swrast/s_points.c
index 846c485f15a..61ff4d0b84c 100644
--- a/src/mesa/swrast/s_points.c
+++ b/src/mesa/swrast/s_points.c
@@ -129,13 +129,13 @@ sprite_point(GLcontext *ctx, const SWvertex *vert)
       s = 0.0;
       dsdx = 1.0 / size;
       if (ctx->Point.SpriteOrigin == GL_LOWER_LEFT) {
-         t0 = 0.0;
          dtdy = 1.0 / size;
+         t0 = 0.5 * dtdy;
       }
       else {
          /* GL_UPPER_LEFT */
-         t0 = 1.0;
          dtdy = -1.0 / size;
+         t0 = 1.0 + 0.5 * dtdy;
       }
 
       ATTRIB_LOOP_BEGIN