Mesa (master): mesa: Also report the number of renderbuffer alpha bits for GL_LUMINANCE_ALPHA.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 5f13c39484859393cec11b3aa24e541bea8e220d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5f13c39484859393cec11b3aa24e541bea8e220d

Author: Eric Anholt <eric at anholt.net>
Date:   Sun Jan  2 18:12:29 2011 -0800

mesa: Also report the number of renderbuffer alpha bits for GL_LUMINANCE_ALPHA.

Noticed by code inspection.

---

 src/mesa/main/fbobject.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index f7b7723..f004d7a 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -1190,7 +1190,8 @@ get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
          return 0;
    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
-      if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA)
+      if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||
+	  baseFormat == GL_LUMINANCE_ALPHA)
          return _mesa_get_format_bits(format, pname);
       else
          return 0;