lcd-24bit: Introduce a 24-bit mid-level LCD driver

With LCD driver all calculation will be performed on RGB888 and the hardware/OS
can display from our 24bit framebuffer.

It is not yet as performance optimized as the existing drivers but should be
good enough.The vast number of small changes is due to the fact that
fb_data can be a struct type now, while most of the code expected a scalar type.

lcd-as-memframe ASM code does not work with 24bit currently so the with 24bit
it enforces the generic C code.

All plugins are ported over. Except for rockpaint. It uses so much memory that
it wouldnt fit into the 512k plugin buffer anymore (patches welcome).

Change-Id: Ibb1964545028ce0d8ff9833ccc3ab66be3ee0754

1 files changed, 9 insertions, 0 deletions

diff --git a/apps/plugins/rockboy/sys_rockbox.c b/apps/plugins/rockboy/sys_rockbox.c
index 1bf63b7a74..a758f73da3 100644
--- a/apps/plugins/rockboy/sys_rockbox.c
+++ b/apps/plugins/rockboy/sys_rockbox.c
@@ -261,12 +261,21 @@ void vid_init(void)
     fb.enabled=1;
 
 #if defined(HAVE_LCD_COLOR)
+#if LCD_DEPTH == 24
+    fb.cc[0].r = 0;  /* 8-8 (wasted bits on red) */
+    fb.cc[0].l = 16; /* this is the offset to the R bits (24-8) */
+    fb.cc[1].r = 0;  /* 8-6 (wasted bits on green) */
+    fb.cc[1].l = 8;  /* This is the offset to the G bits (24-8-8) */
+    fb.cc[2].r = 0;  /* 8-5 (wasted bits on red) */
+    fb.cc[2].l = 0;  /* This is the offset to the B bits (24-8-8-8) */
+#else
     fb.cc[0].r = 3;  /* 8-5 (wasted bits on red) */
     fb.cc[0].l = 11; /* this is the offset to the R bits (16-5) */
     fb.cc[1].r = 2;  /* 8-6 (wasted bits on green) */
     fb.cc[1].l = 5;  /* This is the offset to the G bits (16-5-6) */
     fb.cc[2].r = 3;  /* 8-5 (wasted bits on red) */
     fb.cc[2].l = 0;  /* This is the offset to the B bits (16-5-6-5) */
+#endif
 #else
     fb.mode=3;
 #endif