forked from len0rd/rockbox
046cc497ad
int is an incompatible type for targets that have 32bit fb_data need to use FB_SCALARPACK for them Change-Id: Ib3b5ff19c54d8d1bb76af33d0538a17a71301514
146 lines
4.1 KiB
Lua
146 lines
4.1 KiB
Lua
--[[ Lua LCD Wrapper functions
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2017 William Wilgus
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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]]
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--[[ Exposed Functions
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_lcd.clear
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_lcd.duplicate
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_lcd.image
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_lcd.set_viewport
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_lcd.splashf
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_lcd.text_extent
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_lcd.update
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_lcd.update_rect
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-- Exposed Constants
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_lcd.CX
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_lcd.CY
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_lcd.DEPTH
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_lcd.W
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_lcd.H
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_lcd
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_LCD
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]]
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if not rb.lcd_framebuffer then rb.splash(rb.HZ, "No Support!") return nil end
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_LCD = rb.lcd_framebuffer()
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local _lcd = {} do
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--internal constants
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local _NIL = nil -- _NIL placeholder
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-- clamps value to >= min and <= max
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local function clamp(val, min, max)
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-- Warning doesn't check if min < max
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if val < min then
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return min
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elseif val < max then
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return val
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end
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return max
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end
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-- return a copy of lcd screen
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_lcd.duplicate = function(t, screen_img)
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screen_img = screen_img or rb.new_image()
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screen_img:copy(rb.lcd_framebuffer())
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return screen_img
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end
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-- updates screen in specified rectangle
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_lcd.update_rect = function(t, x, y, w, h)
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rb.lcd_update_rect(x - 1, y - 1,
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clamp(x + w, 1, rb.LCD_WIDTH) - 1,
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clamp(y + h, 1, rb.LCD_HEIGHT) - 1)
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end
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-- clears lcd, optional.. ([color, x1, y1, x2, y2, clip])
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_lcd.clear = function(t, clr, ...)
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rb.lcd_scroll_stop() --rb really doesn't like bg change while scroll
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if clr == _NIL and ... == _NIL then
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rb.lcd_clear_display()
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else
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_LCD:clear(clr, ...)
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end
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end
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-- loads an image to the screen
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_lcd.image = function(t, src, x, y)
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if not src then --make sure an image was passed, otherwise bail
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rb.splash(rb.HZ, "No Image!")
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return _NIL
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end
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_LCD:copy(src,x,y,1,1)
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end
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-- Formattable version of splash
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_lcd.splashf = function(t, timeout, ...)
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rb.splash(timeout, string.format(...))
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end
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-- Gets size of text
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_lcd.text_extent = function(t, msg, font)
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font = font or rb.FONT_UI
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return rb.font_getstringsize(msg, font)
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end
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-- Sets viewport size
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_lcd.set_viewport = function(t, vp)
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if not vp then rb.set_viewport() return end
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if rb.LCD_DEPTH == 2 then -- invert 2-bit screens
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--vp.drawmode = bit.bxor(vp.drawmode, 4)
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vp.fg_pattern = 3 - vp.fg_pattern
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vp.bg_pattern = 3 - vp.bg_pattern
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end
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rb.set_viewport(vp)
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end
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-- allows the use of _lcd() as a identifier for the screen
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local function index(k, v)
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return function(x, ...)
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_LCD[v](_LCD, ...)
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end
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end
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-- allows the use of _lcd() as a identifier for the screen
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local function call()
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return rb.lcd_framebuffer()
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end
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--expose functions to the outside through _lcd table
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_lcd.update = rb.lcd_update
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_lcd.DEPTH = rb.LCD_DEPTH
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_lcd.W = rb.LCD_WIDTH
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_lcd.H = rb.LCD_HEIGHT
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_lcd.CX = (rb.LCD_WIDTH / 2)
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_lcd.CY = (rb.LCD_HEIGHT / 2)
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_lcd = setmetatable(_lcd,{__index = index, __call = call})
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end -- _lcd functions
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return _lcd
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