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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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8
firmware/drivers/lcd-bitmap-common.c
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@ -81,6 +81,14 @@ static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
}
#endif
void LCDFN(set_framebuffer)(FBFN(data) *fb)
{
if (fb)
LCDFN(framebuffer) = fb;
else
LCDFN(framebuffer) = &LCDFN(static_framebuffer)[0][0];
}
/*
* draws the borders of the current viewport
**/