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

3 files changed, 4 insertions, 4 deletions

diff --git a/firmware/target/arm/as3525/lcd-fuze.c b/firmware/target/arm/as3525/lcd-fuze.c
index df4d668ab0..a1ccea348d 100644
--- a/firmware/target/arm/as3525/lcd-fuze.c
+++ b/firmware/target/arm/as3525/lcd-fuze.c
@@ -291,7 +291,7 @@ void lcd_update(void)
 
     lcd_write_cmd(R_WRITE_DATA_2_GRAM);
 
-    dbop_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
+    dbop_write_data(FBADDR(0,0), LCD_WIDTH*LCD_HEIGHT);
 }
 
 /* Update a fraction of the display. */
diff --git a/firmware/target/arm/tms320dm320/creative-zvm/lcd-creativezvm.c b/firmware/target/arm/tms320dm320/creative-zvm/lcd-creativezvm.c
index 5f623dc239..9621b532fe 100644
--- a/firmware/target/arm/tms320dm320/creative-zvm/lcd-creativezvm.c
+++ b/firmware/target/arm/tms320dm320/creative-zvm/lcd-creativezvm.c
@@ -251,7 +251,7 @@ void lcd_set_direct_fb(bool yes)
     unsigned int addr;
     direct_fb_access = yes;
     if(yes)
-        addr = ((unsigned int)&lcd_framebuffer-CONFIG_SDRAM_START) / 32;
+        addr = ((unsigned int)FBADDR(0,0)-CONFIG_SDRAM_START) / 32;
     else
         addr = ((unsigned int)FRAME-CONFIG_SDRAM_START) / 32;
     IO_OSD_OSDWINADH = addr >> 16;
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/lcd-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/lcd-mr500.c
index c3a96a3efd..d952d3d40d 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/lcd-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/lcd-mr500.c
@@ -489,7 +489,7 @@ void lcd_update_rect(int x, int y, int width, int height)
 #if CONFIG_ORIENTATION == SCREEN_PORTRAIT
 
 #if defined(LCD_USE_DMA)
-    dma_start_transfer16( (char *)lcd_framebuffer, x, y, LCD_WIDTH, 
+    dma_start_transfer16( (char *)FBADDR(0,0), x, y, LCD_WIDTH, 
         x, y, width, height, 2);
 #else
     register fb_data *dst;
@@ -514,7 +514,7 @@ void lcd_update_rect(int x, int y, int width, int height)
 #if   defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
 
 #if defined(LCD_USE_DMA)
-    dma_start_transfer16( (char *)lcd_framebuffer, x, y, LCD_HEIGHT, 
+    dma_start_transfer16( (char *)FBADDR(0,0), x, y, LCD_HEIGHT, 
         x, y, width, height, 2);
 #else
     fb_data *src;