ecore_drm2: Add start of work on Ecore_Drm2_Fb support

NB: Nothing functional here, just adding the structure and file to
build order

src/lib/ecore_drm2/Ecore_Drm2.h

@@ -40,6 +40,9 @@ typedef enum _Ecore_Drm2_Relative_Mode
    ECORE_DRM2_RELATIVE_MODE_TO_BELOW
 } Ecore_Drm2_Relative_Mode;
 
+/* opaque structure to represent a drm framebuffer */
+typedef struct _Ecore_Drm2_Fb Ecore_Drm2_Fb;
+
 /* opaque structure to represent a drm crtc */
 typedef struct _Ecore_Drm2_Crtc Ecore_Drm2_Crtc;
 

src/lib/ecore_drm2/ecore_drm2_fb.c

@@ -0,0 +1 @@
+#include "ecore_drm2_private.h"

src/lib/ecore_drm2/ecore_drm2_private.h

@@ -214,6 +214,13 @@ typedef struct _Ecore_Drm2_Display_State
 } Ecore_Drm2_Display_State;
 
 /* opaque API structures */
+struct _Ecore_Drm2_Fb
+{
+   int w, h;
+   int depth, bpp;
+   uint32_t format;
+};
+
 struct _Ecore_Drm2_Plane
 {
    int fd;

src/lib/ecore_drm2/meson.build

@@ -7,6 +7,7 @@ ecore_drm2_header_src = [
 ]
 
 ecore_drm2_src = files([
+  'ecore_drm2_fb.c',
   'ecore_drm2_displays.c',
   'ecore_drm2_connectors.c',
   'ecore_drm2_planes.c',