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, 3 deletions

diff --git a/apps/plugins/imageviewer/jpeg/yuv2rgb.c b/apps/plugins/imageviewer/jpeg/yuv2rgb.c
index 5504e425e6..d0d5cb683b 100644
--- a/apps/plugins/imageviewer/jpeg/yuv2rgb.c
+++ b/apps/plugins/imageviewer/jpeg/yuv2rgb.c
@@ -236,15 +236,15 @@ static fb_data (* const pixel_funcs[COLOUR_NUM_MODES][DITHER_NUM_MODES])(void) =
         [DITHER_DIFFUSION] = pixel_fsdither_to_lcd,
     },
 };
-
+static fb_data *lcd_fb = NULL;
 /* These defines are used fornormal horizontal strides and vertical strides. */
 #if   defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
-#define LCDADDR(x, y)   (*rb->lcd_framebuffer + LCD_HEIGHT*(x) + (y))
+#define LCDADDR(x, y)   (lcd_fb + LCD_HEIGHT*(x) + (y))
 #define ROWENDOFFSET    (width*LCD_HEIGHT)
 #define ROWOFFSET       (1)
 #define COLOFFSET       (LCD_HEIGHT)
 #else
-#define LCDADDR(x, y) (*rb->lcd_framebuffer + LCD_WIDTH*(y) + (x))
+#define LCDADDR(x, y) (lcd_fb + LCD_WIDTH*(y) + (x))
 #define ROWENDOFFSET    (width)
 #define ROWOFFSET       (LCD_WIDTH)
 #define COLOFFSET       (1)
@@ -261,6 +261,12 @@ void yuv_bitmap_part(unsigned char *src[3], int csub_x, int csub_y,
                      int x, int y, int width, int height,
                      int colour_mode, int dither_mode)
 {
+    if (!lcd_fb)
+    {
+        struct viewport *vp_main = *(rb->screens[SCREEN_MAIN]->current_viewport);
+        lcd_fb = vp_main->buffer->fb_ptr;
+    }
+
     fb_data *dst, *dst_end;
     fb_data (*pixel_func)(void);
     struct rgb_pixel px;