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, 8 insertions, 3 deletions

diff --git a/apps/plugins/plasma.c b/apps/plugins/plasma.c
index 9e2e3832a3..f944d3d775 100644
--- a/apps/plugins/plasma.c
+++ b/apps/plugins/plasma.c
@@ -36,6 +36,8 @@
 
 
 /******************************* Globals ***********************************/
+static fb_data *lcd_fb;
+
 
 static unsigned char wave_array[256];  /* Pre calculated wave array */
 #ifdef HAVE_LCD_COLOR
@@ -201,9 +203,9 @@ int main(void)
 #ifdef HAVE_LCD_COLOR
         shades_generate(time++); /* dynamically */
 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
-        ptr = (unsigned char*)*rb->lcd_framebuffer;
+        ptr = (unsigned char*)lcd_fb;
 #else
-        ptr = *rb->lcd_framebuffer;
+        ptr = lcd_fb;
 #endif
 
 #else
@@ -237,7 +239,7 @@ int main(void)
         p4-=sp4;
 #ifdef HAVE_LCD_COLOR
 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
-        rb->lcd_blit_pal256(    (unsigned char*)*rb->lcd_framebuffer,
+        rb->lcd_blit_pal256(    (unsigned char*)lcd_fb,
                                 0,0,0,0,LCD_WIDTH,LCD_HEIGHT);
 #else
         rb->lcd_update();
@@ -326,5 +328,8 @@ enum plugin_status plugin_start(const void* parameter)
 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
     rb->lcd_set_mode(LCD_MODE_PAL256);
 #endif
+    struct viewport *vp_main = rb->lcd_set_viewport(NULL);
+    lcd_fb = vp_main->buffer->fb_ptr;
+
     return main();
 }