On 01/27/2012 05:09 PM, Kenneth Graunke wrote:
According to Table 6.17 in the GL 2.1 specification, DEPTH_TEXTURE_MODE,
TEXTURE_COMPARE_MODE, and TEXTURE_COMPARE_FUNC need to be restored on
glPopAttrib(GL_TEXTURE_BIT).

Makes oglconform's shad-compiler advanced.TestShadow2D_VertShader test
a bit less grumbly.

NOTE: This is a candidate for release branches.
Signed-off-by: Kenneth Graunke<kenn...@whitecape.org>
---
  src/mesa/main/attrib.c |    3 +++
  1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 01e7945..07884c1 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -796,6 +796,9 @@ pop_texture_group(struct gl_context *ctx, struct 
texture_state *texstate)
              _mesa_TexParameterf(target, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB,
                                  samp->CompareFailValue);
           }
+         _mesa_TexParameteri(target, GL_DEPTH_TEXTURE_MODE, samp->DepthMode);
+         _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_MODE, 
samp->CompareMode);
+         _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_FUNC, 
samp->CompareFunc);
        }

        /* remove saved references to the texture objects */

I think you need to enclose those calls inside conditionals that checks if GL_ARB_depth_texture or GL_ARB_shadow is supported. Otherwise, if the extension is not supported, these calls will generate unexpected GL errors.

-Brian

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