mesa: Fix the datatype of GL_DEPTH32F_STENCIL8's depth channel.

Asking for the datatype of MESA_FORMAT_Z32_FLOAT_X24S8 is a bit funny
-- there's a float depth channel, and a stencil channel that doesn't
have a particular GLenum associated with its type, so what's the
correct response?

Because there is no query for stencil, just make this format's
datatype be that of the depth channel.  It fixes the depth query (and
thus a failure in piglit gl-3.0-required-sized-formats), and none of
the other consumers of the _mesa_get_format_datatype() API care.

v2: Add a comment for why the DataType is this way for this format.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index d3b12d008f140152a3c84369accecae6a9cd5765..6709ef5a82e32f96ca0a47de57b91dc55139c2c2 100644 (file)
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -1491,7 +1491,10 @@ static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
       MESA_FORMAT_Z32_FLOAT_X24S8, /* Name */
       "MESA_FORMAT_Z32_FLOAT_X24S8", /* StrName */
       GL_DEPTH_STENCIL,            /* BaseFormat */
-      GL_NONE /* XXX */,           /* DataType */
+      /* DataType here is used to answer GL_TEXTURE_DEPTH_TYPE queries, and is
+       * never used for stencil because stencil is always GL_UNSIGNED_INT.
+       */
+      GL_FLOAT,                    /* DataType */
       0, 0, 0, 0,                  /* Red/Green/Blue/AlphaBits */
       0, 0, 0, 32, 8,              /* Lum/Int/Index/Depth/StencilBits */
       1, 1, 8                      /* BlockWidth/Height,Bytes */