Adapt OSD in plugin lib to be greylib compatible.

Requires addition of viewports and alternate framebuffers to greylib
which are essentially similar to the core implementation except that
the framebuffer can be any size and relationship to a viewport. Drawing
is always fully clipped to the intersecting area.

Adapt oscilloscope.c to the API change. FFT will use the new features
(later update).

Get rid of silly and wrong lcd_bmp_part use in OSD. Remove it from
plugin API (must be made incompatible now).

Change-Id: Iafa5e2174148fb8ad11db6b9d4add0dcabc5c563

1 files changed, 5 insertions, 4 deletions

diff --git a/apps/plugins/lib/grey_core.c b/apps/plugins/lib/grey_core.c
index c2e0747718..047e4cc160 100644
--- a/apps/plugins/lib/grey_core.c
+++ b/apps/plugins/lib/grey_core.c
@@ -677,10 +677,11 @@ bool grey_init(unsigned char *gbuf, long gbuf_size,
     _grey_info.bheight = bdim;
 #endif
     _grey_info.flags = features & 0xff;
-    _grey_info.fg_brightness = 0;
-    _grey_info.bg_brightness = 255;
-    _grey_info.drawmode = DRMODE_SOLID;
-    _grey_info.curfont = FONT_SYSFIXED;
+
+    /* default viewport and settings */
+    grey_set_viewport(NULL);
+    grey_viewport_set_fullscreen(NULL, SCREEN_MAIN);
+    grey_set_framebuffer(NULL);
 
     /* precalculate the value -> pattern index conversion table, taking
        linearisation and gamma correction into account */