gallium: Add a helper for implementing PIPE_CAP_* default values.

One of the pains of implementing a gallium driver is filling in a million
pipe caps you don't know about yet when you're just starting out.  One of
the pains of working on gallium is copy-and-pasting your new PIPE_CAP into
each driver.  We can fix both of these by having each driver call into the
default helper from their default case, so that both sides can ignore each
other until they need to.

v2: fix i915g build, revert swr change to avoid breaking scons build
    (https://travis-ci.org/anholt/mesa/jobs/419739857)
v3: Rebase on 3 new gallium caps.

Reviewed-by: Marek Olšák <[email protected]> (v1)
Cc: Bruce Cherniak <[email protected]>
Cc: George Kyriazis <[email protected]>
Cc: Kenneth Graunke <[email protected]>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_screen.h b/src/gallium/auxiliary/util/u_screen.h
new file mode 100644
index 00000000000..65afb277ef3
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_screen.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2018 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+struct pipe_screen;
+enum pipe_cap;
+
+int
+u_pipe_screen_get_param_defaults(struct pipe_screen *pscreen,
+                                 enum pipe_cap param);