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

3 files changed, 17 insertions, 12 deletions

diff --git a/apps/plugins/rockboy/lcd-gb.h b/apps/plugins/rockboy/lcd-gb.h
index 36b971a..239ccbe 100644
--- a/apps/plugins/rockboy/lcd-gb.h
+++ b/apps/plugins/rockboy/lcd-gb.h
@@ -3,6 +3,7 @@
 #ifndef __LCD_GB_H__
 #define __LCD_GB_H__
 
+#include "lcd.h"
 #include "defs.h"
 
 struct vissprite
@@ -23,7 +24,7 @@ struct scan
 #elif LCD_DEPTH > 4
     byte buf[256];
 #endif
-    un16 pal[64];
+    fb_data pal[64];
     byte pri[256];
     struct vissprite vs[16];
     int ns, l, x, y, s, t, u, v, wx, wy, wt, wv;
@@ -61,6 +62,3 @@ void pal_dirty(void) ICODE_ATTR;
 void lcd_reset(void);
 
 #endif
-
-
-
diff --git a/apps/plugins/rockboy/lcd.c b/apps/plugins/rockboy/lcd.c
index 2dc983f..e8d43f7 100644
--- a/apps/plugins/rockboy/lcd.c
+++ b/apps/plugins/rockboy/lcd.c
@@ -19,7 +19,7 @@ struct scan scan IBSS_ATTR;
 #define BG (scan.bg)
 #define WND (scan.wnd)
 
-#if LCD_DEPTH ==16
+#if LCD_DEPTH >= 16
 #define BUF (scan.buf)
 #else
 #define BUF (scan.buf[scanline_ind])
@@ -1154,6 +1154,7 @@ void set_pal(void)
 static void updatepalette(int i)
 {
     int c, r, g, b;
+    fb_data px;
 
     c = (lcd.pal[i<<1] | ((int)lcd.pal[(i<<1)|1] << 8)) & 0x7FFF;
     r = (c & 0x001F) << 3;
@@ -1167,18 +1168,16 @@ static void updatepalette(int i)
     g = (g >> fb.cc[1].r) << fb.cc[1].l;
     b = (b >> fb.cc[2].r) << fb.cc[2].l;
 
-#if LCD_PIXELFORMAT == RGB565
     c = r|g|b;
-#elif LCD_PIXELFORMAT == RGB565SWAPPED
-    c = swap16(r|g|b);
-#endif
+
+    px = FB_SCALARPACK_LCD(c);
 
     /* updatepalette might get called, but the pallete does not necessarily
      *  need to be updated.
      */
-    if(PAL[i]!=c) 
+    if(memcmp(&PAL[i], &px, sizeof(fb_data)))
     {
-        PAL[i] = c;
+        PAL[i] = px;
 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
         rb->lcd_pal256_update_pal(PAL);
 #endif
@@ -1256,4 +1255,3 @@ void lcd_reset(void)
     lcd_begin();
     vram_dirty();
 }
-
diff --git a/apps/plugins/rockboy/sys_rockbox.c b/apps/plugins/rockboy/sys_rockbox.c
index 1bf63b7..a758f73 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