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lcd/skin_engine: Add the ability to draw onto the backdrop layer

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The framebuffer the lcd driver uses can now be changed on the fly
which means that regular lcd_* drawing functions can draw onto the
"backdrop" buffer. The skin engine can use this to create layered
effects.

Add the tag %VB to a viewport to draw that viewport onto the
backdrop layer. If you want to draw an image onto the backdrop
framebuffer use %x(backdrop filename) instead of %X() inside
a viewport with %VB.

Change-Id: I741498e2af6d4f2d78932cabe8942317893e7cfc
This commit is contained in:
Jonathan Gordon 2012-02-28 22:26:32 +11:00
parent 13f98df5ed
commit 2c71aa9feb
13 changed files with 87 additions and 10 deletions
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3
apps/screen_access.h
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@ -160,6 +160,9 @@ struct screen
bool (*backdrop_load)(const char *filename, char* backdrop_buffer);
void (*backdrop_show)(char* backdrop_buffer);
#endif
#if defined(HAVE_LCD_BITMAP)
void (*set_framebuffer)(void *framebuffer);
#endif
};
#if defined(HAVE_LCD_BITMAP) || defined(HAVE_REMOTE_LCD)