Mesa (master): meta: Fix ClearTexture with GL_DEPTH_COMPONENT.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 8705ed13e3114ad994dbd46387576749f54fc7eb
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8705ed13e3114ad994dbd46387576749f54fc7eb

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Mar 21 00:30:06 2017 -0700

meta: Fix ClearTexture with GL_DEPTH_COMPONENT.

We only handled unpacking for GL_DEPTH_STENCIL formats.

Cemu was hitting _mesa_problem() for an unsupported format in
_mesa_unpack_float_32_uint_24_8_depth_stencil_row(), because the
format was depth-only, rather than depth-stencil.

Cc: "13.0 12.0" <mesa-stable at lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94739
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103966
Reviewed-by: Tapani Pälli <tapani.palli at intel.com>

---

 src/mesa/drivers/common/meta.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 85ac7a1fed..52d959a710 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -3510,15 +3510,20 @@ cleartexsubimage_depth_stencil(struct gl_context *ctx,
       /* Convert the clearValue from whatever format it's in to a floating
        * point value for the depth and an integer value for the stencil index
        */
-      _mesa_unpack_float_32_uint_24_8_depth_stencil_row(texImage->TexFormat,
-                                                        1, /* n */
-                                                        clearValue,
-                                                        depthStencilValue);
-      /* We need a memcpy here instead of a cast because we need to
-       * reinterpret the bytes as a float rather than converting it
-       */
-      memcpy(&depthValue, depthStencilValue, sizeof depthValue);
-      stencilValue = depthStencilValue[1] & 0xff;
+      if (texImage->_BaseFormat == GL_DEPTH_STENCIL) {
+         _mesa_unpack_float_32_uint_24_8_depth_stencil_row(texImage->TexFormat,
+                                                           1, /* n */
+                                                           clearValue,
+                                                           depthStencilValue);
+         /* We need a memcpy here instead of a cast because we need to
+          * reinterpret the bytes as a float rather than converting it
+          */
+         memcpy(&depthValue, depthStencilValue, sizeof depthValue);
+         stencilValue = depthStencilValue[1] & 0xff;
+      } else {
+         _mesa_unpack_float_z_row(texImage->TexFormat, 1 /* n */,
+                                  clearValue, &depthValue);
+      }
    }
 
    if (texImage->_BaseFormat == GL_DEPTH_STENCIL)