libGL: Make sure a valid value is returned for GLX_BIND_TO_MIPMAP_TEXTURE_EXT.

If the server didn't send a value, assume it's not supported.

A more generic solution might be better for this kind of problem, but an
attempt for this failed (see https://bugs.freedesktop.org/show_bug.cgi?id=9264)
and this allows compiz to work with drivers that support
GL_EXT_framebuffer_object.

diff --git a/src/glx/x11/glcontextmodes.c b/src/glx/x11/glcontextmodes.c
index 79bdce7..58c548a 100644 (file)
--- a/src/glx/x11/glcontextmodes.c
+++ b/src/glx/x11/glcontextmodes.c
@@ -333,7 +333,8 @@ _gl_get_context_mode_data(const __GLcontextModes *mode, int attribute,
        *value_return = mode->bindToTextureRgba;
        return 0;
       case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
-       *value_return = mode->bindToMipmapTexture;
+       *value_return = mode->bindToMipmapTexture == GL_TRUE ? GL_TRUE :
+           GL_FALSE;
        return 0;
       case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
        *value_return = mode->bindToTextureTargets;