intel: Don't _mesa_problem when asked for an RB of a texturing-only type.

We want to be able to support some formats for texturing that we can't
render to, which means that some choices for RenderbufferStorage end
up being incomplete (for example, L8 currently).  For these, where we
don't render to them, we don't want to have to make up an rb->DataType
that's only used for GetRow()/PutRow().

2 files changed, 11 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_span.c b/src/mesa/drivers/dri/intel/intel_span.c
index 604962d3f54..191f7761d97 100644
--- a/src/mesa/drivers/dri/intel/intel_span.c
+++ b/src/mesa/drivers/dri/intel/intel_span.c
@@ -436,4 +436,11 @@ intel_set_span_functions(struct intel_context *intel,
 
    assert(intel_span_init_funcs[irb->Base.Format]);
    intel_span_init_funcs[irb->Base.Format](rb);
+
+   if (rb->DataType == GL_NONE) {
+      _mesa_problem(NULL,
+		    "renderbuffer format %s is missing "
+		    "intel_mesa_format_to_rb_datatype() support.",
+		    _mesa_get_format_name(rb->Format));
+   }
 }
diff --git a/src/mesa/drivers/dri/intel/intel_tex_format.c b/src/mesa/drivers/dri/intel/intel_tex_format.c
index 6890a690ab1..a9f4981ab74 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_format.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_format.c
@@ -42,8 +42,10 @@ intel_mesa_format_to_rb_datatype(gl_format format)
       return GL_FLOAT;
 
    default:
-      _mesa_problem(NULL, "unexpected MESA_FORMAT for renderbuffer");
-      return GL_UNSIGNED_BYTE;
+      /* Unsupported format.  We may hit this when people ask for FBO-incomplete
+       * formats.
+       */
+      return GL_NONE;
    }
 }