diff options
| author | Kenneth Graunke <kenneth@whitecape.org> | 2013-04-02 10:22:18 -0700 |
|---|---|---|
| committer | Kenneth Graunke <kenneth@whitecape.org> | 2013-04-04 15:38:18 -0700 |
| commit | 1e3235d36e45ee7565d322971dfa179f48d79767 (patch) | |
| tree | a6964f5567e64475655da4a26eb8d65573de73b9 | |
| parent | 9eef86bb55108bfe2537d90e7efb41a30bf8547a (diff) | |
mesa: Add new ctx->Stencil._WriteEnabled derived state flag.
i965 needs to know whether stencil writes are enabled in several places,
and gets the test wrong sometimes. While we could create a function to
compute this, it seems generally useful enough to warrant a new piece of
derived state. Also, all the plumbing is already in place.
NOTE: This is a candidate for stable branches.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
| -rw-r--r-- | src/mesa/main/mtypes.h | 1 | ||||
| -rw-r--r-- | src/mesa/main/stencil.c | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index ace6938da5..e731fe3ab3 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1015,6 +1015,7 @@ struct gl_stencil_attrib GLboolean TestTwoSide; /**< GL_EXT_stencil_two_side */ GLubyte ActiveFace; /**< GL_EXT_stencil_two_side (0 or 2) */ GLboolean _Enabled; /**< Enabled and stencil buffer present */ + GLboolean _WriteEnabled; /**< _Enabled and non-zero writemasks */ GLboolean _TestTwoSide; GLubyte _BackFace; /**< Current back stencil state (1 or 2) */ GLenum Function[3]; /**< Stencil function */ diff --git a/src/mesa/main/stencil.c b/src/mesa/main/stencil.c index c161808e58..3308417313 100644 --- a/src/mesa/main/stencil.c +++ b/src/mesa/main/stencil.c @@ -551,6 +551,11 @@ _mesa_update_stencil(struct gl_context *ctx) ctx->Stencil.Ref[0] != ctx->Stencil.Ref[face] || ctx->Stencil.ValueMask[0] != ctx->Stencil.ValueMask[face] || ctx->Stencil.WriteMask[0] != ctx->Stencil.WriteMask[face]); + + ctx->Stencil._WriteEnabled = + ctx->Stencil._Enabled && + (ctx->Stencil.WriteMask[0] != 0 || + (ctx->Stencil._TestTwoSide && ctx->Stencil.WriteMask[face] != 0)); } |