[weston] linux-dmabuf: align DMABUF exposed formats with EGL supported formats

[Vincent Abriou]

Even if EGL_EXT_image_dma_buf_import does not provide a way to query
the supported pixel formats, we can at least expose to the DMABUF
protocol the pixel formats already explicitly supported as fallback
by gl-renderer in import_yuv_dmabuf function plus the standard RGB formats
that all GPU supports:
ARGB8888, XRGB8888, RGB565, YUYV, NV12, YUV420 and YUV444.

Signed-off-by: Vincent Abriou <vincent.abriou at st.com>
---
 Makefile.am              |  3 +++
 libweston/linux-dmabuf.c | 18 +++++++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index c94c211..6366c6f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -72,6 +72,9 @@ install-libweston_moduleLTLIBRARIES install-moduleLTLIBRARIES: install-libLTLIBR
 lib_LTLIBRARIES = libweston- at LIBWESTON_MAJOR@.la
 libweston_ at LIBWESTON_MAJOR@_la_CPPFLAGS = $(AM_CPPFLAGS) -DIN_WESTON
 libweston_ at LIBWESTON_MAJOR@_la_CFLAGS = $(AM_CFLAGS) $(COMPOSITOR_CFLAGS) $(LIBUNWIND_CFLAGS)
+if ENABLE_DRM_COMPOSITOR
+libweston_ at LIBWESTON_MAJOR@_la_CFLAGS += $(DRM_COMPOSITOR_CFLAGS)
+endif
 libweston_ at LIBWESTON_MAJOR@_la_LIBADD = $(COMPOSITOR_LIBS) $(LIBUNWIND_LIBS) \
 	$(DLOPEN_LIBS) -lm $(CLOCK_GETTIME_LIBS) \
 	$(LIBINPUT_BACKEND_LIBS) libshared.la
diff --git a/libweston/linux-dmabuf.c b/libweston/linux-dmabuf.c
index 7b29f08..c288333 100644
--- a/libweston/linux-dmabuf.c
+++ b/libweston/linux-dmabuf.c
@@ -23,6 +23,7 @@
 #include "config.h"
 
 #include <assert.h>
+#include <drm_fourcc.h>
 #include <stdint.h>
 #include <unistd.h>
 #include <sys/types.h>
@@ -30,6 +31,17 @@
 #include "compositor.h"
 #include "linux-dmabuf.h"
 #include "linux-dmabuf-unstable-v1-server-protocol.h"
+#include "shared/helpers.h"
+
+uint32_t dmabuf_formats[] = {
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_YUV420,
+	DRM_FORMAT_YUV444,
+};
 
 static void
 linux_dmabuf_buffer_destroy(struct linux_dmabuf_buffer *buffer)
@@ -423,6 +435,7 @@ bind_linux_dmabuf(struct wl_client *client,
 {
 	struct weston_compositor *compositor = data;
 	struct wl_resource *resource;
+	unsigned int i;
 
 	resource = wl_resource_create(client, &zwp_linux_dmabuf_v1_interface,
 				      version, id);
@@ -434,9 +447,8 @@ bind_linux_dmabuf(struct wl_client *client,
 	wl_resource_set_implementation(resource, &linux_dmabuf_implementation,
 				       compositor, NULL);
 
-	/* EGL_EXT_image_dma_buf_import does not provide a way to query the
-	 * supported pixel formats. */
-	/* XXX: send formats */
+	for (i = 0; i < ARRAY_LENGTH(dmabuf_formats); i++)
+		zwp_linux_dmabuf_v1_send_format(resource, dmabuf_formats[i]);
 }
 
 /** Advertise linux_dmabuf support
-- 
1.9.1