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Added lcd_update_rect(), for updating only a part of the LCD. This was

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written "blindly". I've not tested this on hardware (yet).

The simulators will need to get this funtion added as well.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1643 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Daniel Stenberg 2002-08-09 12:20:54 +00:00
parent 9bf86f75fa
commit 6985f34beb
3 changed files with 46 additions and 1 deletions
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34
firmware/drivers/lcd.c
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@ -594,6 +594,40 @@ void lcd_update (void)
}
}
/*
* Update a fraction of the display.
*/
void lcd_update_rect (int, int, int, int) __attribute__ ((section (".icode")));
void lcd_update_rect (int x_start, int y,
int width, int height)
{
int ymax;
int xmax;
int x;
/* The Y coordinates have to work on even 8 pixel rows */
ymax = (y + height)/8;
y /= 8;
xmax = x_start + width;
if(xmax > LCD_WIDTH)
xmax = LCD_WIDTH;
if(ymax >= LCD_HEIGHT/8)
ymax = LCD_HEIGHT/8-1;
/* Copy specified rectange bitmap to hardware */
for (; y <= ymax; y++)
{
lcd_write (true, LCD_CNTL_PAGE | (y & 0xf));
lcd_write (true, LCD_CNTL_HIGHCOL | ((x_start>>4) & 0xf));
lcd_write (true, LCD_CNTL_LOWCOL | (x_start & 0xf));
for (x = x_start; x < xmax; x++)
lcd_write (false, lcd_framebuffer[x][y]);
}
}
#endif /* SIMULATOR */
/*