LCD core move buf ptr and address look up function viewport struct

I'm currently running up against the limitations of the lcd_draw functions
I want these functions to be able to be used on any size buffer not
just buffers with a stride matching the underlying device

[DONE] allow the framebuffer to be decoupled from the device framebuffer
[DONE need examples] allow for some simple blit like transformations
[DONE] remove the device framebuffer from the plugin api
[DONE}ditto remote framebuffer
[DONE] remove _viewport_get_framebuffer you can call struct *vp = lcd_set_viewport(NULL) and vp->buffer->fb_ptr

while remote lcds may compile (and work in the sim) its not been tested on targets

[FIXED] backdrops need work to be screen agnostic

[FIXED] screen statusbar is not being combined into the main viewport correctly yet

[FIXED] screen elements are displayed incorrectly  after switch to void*

[FIXED] core didn't restore proper viewport on splash etc.

[NEEDS TESTING] remote lcd garbled data

[FIXED] osd lib garbled screen on bmp_part

[FIXED] grey_set_vp needs to return old viewport like lcd_set_viewport

[FIXED] Viewport update now handles viewports with differing buffers/strides by copying to the main buffer

[FIXED] splash on top of WPS leaves old framebuffer data (doesn't redraw)
[UPDATE] refined this a bit more to have clear_viewport set the clean bit and have skin_render do its own screen clear
scrolling viewports no longer trigger wps refresh
also fixed a bug where guisyncyesno was displaying and then disappearing

[ADDED!] New LCD macros that allow you to create properly size frame buffers in you desired size without wasting bytes
(LCD_ and LCD_REMOTE_)
LCD_STRIDE(w, h) same as STRIDE_MAIN
LCD_FBSTRIDE(w, h) returns target specific stride for a buffer W x H
LCD_NBELEMS(w, h) returns the number of fb_data sized elemenst needed for a buffer W x H
LCD_NATIVE_STRIDE(s) conversion between rockbox native vertical and lcd native stride (2bitH)
test_viewports.c has an example of usage

[FIXED!!] 2bit targets don't respect non-native strides
[FIXED] Few define snags

Change-Id: I0d04c3834e464eca84a5a715743a297a0cefd0af

1 files changed, 9 insertions, 4 deletions

diff --git a/apps/plugins/lib/grey_core.c b/apps/plugins/lib/grey_core.c
index 9686f1d021..e3543aeba2 100644
--- a/apps/plugins/lib/grey_core.c
+++ b/apps/plugins/lib/grey_core.c
@@ -765,6 +765,11 @@ static const unsigned char colorindex[4] = {128, 85, 43, 0};
    content (b&w and greyscale overlay) to an 8-bit BMP file. */
 static void grey_screendump_hook(int fd)
 {
+        fb_data *lcd_fb;
+    struct viewport *vp_main = rb->lcd_set_viewport(NULL);
+    rb->viewport_set_fullscreen(vp_main, SCREEN_MAIN);
+    lcd_fb = vp_main->buffer->fb_ptr;
+
     int i;
     int y, gx, gy;
 #if LCD_PIXELFORMAT == VERTICAL_PACKING
@@ -845,7 +850,7 @@ static void grey_screendump_hook(int fd)
         gsrc = _grey_info.values + _GREY_MULUQ(_grey_info.width, gy);
 
 #if LCD_DEPTH == 2
-        src = *rb->lcd_framebuffer + _GREY_MULUQ(LCD_FBWIDTH, y);
+        src = lcd_fb + _GREY_MULUQ(LCD_FBWIDTH, y);
         
         do
         {
@@ -876,7 +881,7 @@ static void grey_screendump_hook(int fd)
 
 #if LCD_DEPTH == 1
         mask = BIT_N(y & 7);
-        src = *rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 3);
+        src = lcd_fb + _GREY_MULUQ(LCD_WIDTH, y >> 3);
 
         do
         {
@@ -908,7 +913,7 @@ static void grey_screendump_hook(int fd)
 
 #elif LCD_DEPTH == 2
         shift = 2 * (y & 3);
-        src = *rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 2);
+        src = lcd_fb + _GREY_MULUQ(LCD_WIDTH, y >> 2);
         
         do
         {
@@ -933,7 +938,7 @@ static void grey_screendump_hook(int fd)
 
 #if LCD_DEPTH == 2
         shift = y & 7;
-        src = *rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 3);
+        src = lcd_fb + _GREY_MULUQ(LCD_WIDTH, y >> 3);
         
         do
         {