From ef934dba2d0caab7ab778c99c6005b8b9720eb27 Mon Sep 17 00:00:00 2001
From: Mark Thompson <sw@jkqxz.net>
Date: Sun, 5 Jul 2020 16:49:44 +0100
Subject: kmsgrab: Use GetFB2 if available

The most useful feature here is the ability to automatically extract the
framebuffer format and modifiers.  It also makes support for multi-plane
framebuffers possible, though none are added to the format table in this
patch.

This requires libdrm 2.4.101 (from April 2020) to build, so it includes a
configure check to allow compatibility with existing distributions.  Even
with libdrm support, it still won't do anything at runtime if you are
running Linux < 5.7 (before June 2020).
---
 configure | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index b137669dd3..8de1afcb99 100755
--- a/configure
+++ b/configure
@@ -2325,6 +2325,7 @@ HAVE_LIST="
     $THREADS_LIST
     $TOOLCHAIN_FEATURES
     $TYPES_LIST
+    libdrm_getfb2
     makeinfo
     makeinfo_html
     opencl_d3d11
@@ -6657,6 +6658,9 @@ test_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
 #endif
 EOF
 
+enabled libdrm &&
+    check_pkg_config libdrm_getfb2 libdrm "xf86drmMode.h" drmModeGetFB2
+
 enabled vaapi &&
     check_pkg_config vaapi "libva >= 0.35.0" "va/va.h" vaInitialize
 
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