1 files changed, 154 insertions, 0 deletions
diff --git a/apps/plugins/lua/include_lua/lcd.lua b/apps/plugins/lua/include_lua/lcd.lua
new file mode 100644
index 0000000..bbf0f24
--- /dev/null
+++ b/apps/plugins/lua/include_lua/lcd.lua
@@ -0,0 +1,154 @@
+--[[ Lua LCD Wrapper functions
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2017 William Wilgus
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+]]
+
+--[[ Exposed Functions
+
+    _lcd.clear
+    _lcd.duplicate
+    _lcd.image
+    _lcd.set_viewport
+    _lcd.splashf
+    _lcd.text_extent
+    _lcd.update
+    _lcd.update_rect
+
+-- Exposed Constants
+    _lcd.CX
+    _lcd.CY
+    _lcd.DEPTH
+    _lcd.W
+    _lcd.H
+
+    _lcd
+    _LCD
+
+]]
+if not rb.lcd_framebuffer then rb.splash(rb.HZ, "No Support!") return nil end
+
+_LCD = rb.lcd_framebuffer()
+
+local _lcd = {} do
+
+    --internal constants
+    local _NIL = nil -- _NIL placeholder
+    local LCD_W, LCD_H = rb.LCD_WIDTH, rb.LCD_HEIGHT
+
+   -- clamps value to >= min and <= max
+    local function clamp(val, min, max)
+        -- Warning doesn't check if min < max
+        if val < min then
+            return min
+        elseif val < max then
+            return val
+        end
+        return max
+    end
+
+    -- return a copy of lcd screen
+    local function duplicate(t, screen_img)
+        screen_img = screen_img or rb.new_image()
+        screen_img:copy(rb.lcd_framebuffer())
+        return screen_img
+    end
+
+    -- updates screen in specified rectangle
+    local function update_rect(t, x, y, w, h)
+        rb.lcd_update_rect(x - 1, y - 1,
+             clamp(x + w, 1, LCD_W) - 1,
+             clamp(y + h, 1, LCD_H) - 1)
+    end
+
+    -- clears lcd, optional.. ([color, x1, y1, x2, y2, clip])
+    local function clear(t, clr, ...)
+        if clr == _NIL and ... == _NIL then
+            rb.lcd_clear_display()
+        else
+            rb.lcd_scroll_stop() --rb really doesn't like bg change while scroll
+            _LCD:clear(clr, ...)
+        end
+    end
+
+    -- loads an image to the screen
+    local function image(t, src, x, y)
+        if not src then --make sure an image was passed, otherwise bail
+            rb.splash(rb.HZ, "No Image!")
+            return _NIL
+        end
+        _LCD:copy(src,x,y,1,1)
+    end
+
+    -- Formattable version of splash
+    local function splashf(t, timeout, ...)
+        rb.splash(timeout, string.format(...))
+    end
+
+    -- Gets size of text
+    local function text_extent(t, msg, font)
+        font = font or rb.FONT_UI
+
+        return rb.font_getstringsize(msg, font)
+    end
+
+    -- Sets viewport size
+    local function set_viewport(t, vp)
+        if not vp then rb.set_viewport() return end
+        if rb.LCD_DEPTH  == 2 then -- invert 2-bit screens
+            --vp.drawmode = bit.bxor(vp.drawmode, 4)
+            vp.fg_pattern = 3 - vp.fg_pattern
+            vp.bg_pattern = 3 - vp.bg_pattern
+        end
+        rb.set_viewport(vp)
+    end
+
+    -- allows the use of _lcd() as a identifier for the screen
+    local function index(k, v)
+        return function(x, ...)
+            _LCD[v](_LCD, ...)
+        end
+    end
+
+    -- allows the use of _lcd() as a identifier for the screen
+    local function call()
+        return rb.lcd_framebuffer()
+    end
+
+    --expose functions to the outside through _lcd table
+    _lcd.text_extent  = text_extent
+    _lcd.set_viewport = set_viewport
+    _lcd.duplicate    = duplicate
+    _lcd.update       = rb.lcd_update
+    _lcd.update_rect  = update_rect
+    _lcd.clear        = clear
+    _lcd.splashf      = splashf
+    _lcd.image        = image
+    _lcd.DEPTH        = rb.LCD_DEPTH
+    _lcd.W            = rb.LCD_WIDTH
+    _lcd.H            = rb.LCD_HEIGHT
+    _lcd.CX           = (rb.LCD_WIDTH / 2)
+    _lcd.CY           = (rb.LCD_HEIGHT / 2)
+    _lcd = setmetatable(_lcd,{__index = index, __call = call})
+
+end -- _lcd functions
+
+return _lcd
+