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-rwxr-xr-xapps/plugins/lua_scripts/rlimg.lua919
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diff --git a/apps/plugins/lua_scripts/rlimg.lua b/apps/plugins/lua_scripts/rlimg.lua
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+++ b/apps/plugins/lua_scripts/rlimg.lua
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+--[[
+ __________ __ ___.
+ Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ \/ \/ \/ \/ \/
+ $Id$
+ Example Lua RBIMAGE script
+ Copyright (C) 2009 by Maurus Cuelenaere -- some prior work
+ 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.
+]]--
+
+require("actions") -- Contains rb.actions & rb.contexts
+-- require("buttons") -- Contains rb.buttons -- not needed for this example
+
+local _math = require("math_ex") -- missing math sine cosine, sqrt, clamp functions
+local _timer = require("timer")
+local _clr = require("color") -- clrset, clrinc provides device independent colors
+local _lcd = require("lcd") -- lcd helper functions
+local _print = require("print") -- advanced text printing
+local _img = require("image") -- image manipulation save, rotate, resize, tile, new, load
+local _img_save = require("image_save")
+local _blit = require("blit") -- handy list of blit operations
+local _draw = require("draw") -- draw all the things (primitives)
+local _draw_floodfill = require("draw_floodfill")
+local _draw_text = require("draw_text")
+
+--local scrpath = rb.current_path()"
+
+--package.path = scrpath .. "/?.lua;" .. package.path --add lua_scripts directory to path
+
+require("printmenu") --menu
+
+--[[ RBIMAGE library functions
+NOTE!! on x, y coordinates + width & height
+----------------------------------------------
+When making a new image you specify the width and height say (10, 20).
+Intutively (at least to me) (0,0) (offset addressing) would reference the first
+pixel (top left) and the last pixel (bottom, right) would be (w-1, h-1) or (9, 19)
+but the original rbimage library (like lua) uses 1-based arrays (ordinal addressing)
+for the image data so the first pixel is (1,1) and the last pixel is (w, h)
+this presents a bit of a problem when interfacing with the internal rockbox
+functions as you must remeber to convert all lua coordinates to 0 based coordinates.
+I have opted to not change this in the name of compatibility with old scripts
+
+NOTE2!! on width & height versus offset_x & offset_y :copy()
+------------------------------------------------------------------------
+The only place where RBIMAGE deviates from (ordinal addressing) is in the blit
+/ copy function sx, sy and dx, dy still refer to the same pixel as all the
+other functions but offset_x, and offset_y are zero based
+Example (assuming same sized images)
+dst:copy(src, 1,1, 1,1, 0, 0)
+would copy the first pixel from src to the first pixel of dst
+dst:copy(src, 1,1, 1,1, dst:width()-1, dst:height()-1) would copy all of src to dst
+this might be a bit confusing but makes reversing images (negative offsets) easier.
+Since offsets are auto calculated if empty or out of range you could call it as
+dst:copy(src, 1,1, 1,1, dst:width(), dst:height()) or even
+dst:copy(src, 1,1, 1,1) if you prefered and get the same result
+]]
+
+--'CONSTANTS' (in lua there really is no such thing as all vars are mutable)
+--------------------------------------------------------
+--colors for fg/bg ------------------------
+local WHITE = _clr.set(-1, 255, 255, 255)
+local BLACK = _clr.set(0, 0, 0, 0)
+local RED = _clr.set(WHITE, 255)
+local GREEN = _clr.set(WHITE, 0, 255)
+local BLUE = _clr.set(WHITE, 0, 0, 255)
+-------------------------------------------
+local clrs
+local CANCEL_BUTTON = rb.actions.PLA_CANCEL
+
+-- EXAMPLES ---------------------------------------------------------------------- EXAMPLES---------------------------------------------------------------------
+function my_blit(dst_val, dx, dy, src_val, sx, sy)
+ -- user defined blit operation
+ --this function gets called for every pixel you specify
+ --you may change pixels in both the source and dest image
+ --return nil to stop early
+
+ if _lcd.DEPTH < 2 then
+ return src_val
+ end
+
+ if dst_val == WHITE and bit.band(dx, 1) == 1 and bit.band(dy, 1) == 1 then
+ return BLACK;
+ elseif dst_val == WHITE then
+ return src_val
+ end
+
+ return dst_val
+end
+
+function create_logo()
+ --[[creates a small logo from data array]]
+
+ -- moves scope of white and black from global to local
+ local WHITE = WHITE
+ local BLACK = BLACK
+
+ --[[small array with 16 bits of data per element (16-bits in y direction)
+ while the number of elements (32) is the x direction.
+ in other words 16 rows X 32 columns, totally abritrary actually
+ you could easily rotate or flip it by changing the for loops below ]]
+ local logo = {0xFFFF, 0xFFFF, 0x8001, 0x8001, 0x9E7F, 0x9E7F, 0x9E7F, 0x9E7F,
+ 0x9E3F, 0x9E3F, 0x804F, 0x804F, 0xC0E1, 0xC0F1, 0xFFFD, 0xFFFF,
+ 0xFFFF, 0xFFFF, 0x8001, 0x8001, 0xFF01, 0xFF01, 0xFEFB, 0xFEFB,
+ 0xFDFD, 0xFDFD, 0xFDFD, 0xFCF9, 0xFE03, 0xFE03, 0xFFFF, 0xFFFF}
+
+ local img, img1, img2, img3
+
+ img = _img.new(_lcd.W, _lcd.H)
+ img:clear(BLACK) --[[always clear an image after you create it if you
+ intend to do any thing besides copy something
+ entirely to it as there is no guarantee what
+ state the data within is in, it could be all
+ 0's or it could be every digit of PI ]]
+
+ -- check for an error condition bail if error
+ if(not img or not logo) then
+ return nil
+ end
+
+ local logosz = table.getn(logo)
+ local bits = 16 -- each element contains 16 pixels
+ local data = 0
+
+ for i=1, math.min(logosz, _lcd.W) do
+ for j=0, math.min(bits, _lcd.H) do
+
+ if bit.band(bit.lshift(1, bits - j), logo[i]) > 0 then
+ data = WHITE
+ else
+ data = BLACK
+ end
+ -- Set the pixel at position i, j+1 to the copied data
+ img:set(i, j + 1, data)
+ end
+ end
+
+ -- make a new image the size of our generated logo
+ img1 = _img.new(logosz + 1, bits + 1)
+
+ -- img.copy(dest, source, dx, dy, sx, sy, [w, h])
+ img1:copy(img, 1, 1, 1, 1)
+
+ --[[lua does auto garbage collection, but it is still
+ a good idea to set large items to nil when done anyways]]
+ img = nil
+
+ local sl -- new image size
+ if _lcd.W < _lcd.H then
+ sl = _lcd.W / 3
+ else
+ sl = _lcd.H / 3
+ end
+
+ -- make sl always even by subtracting 1 if needed
+ sl = bit.band(sl, bit.bnot(1))
+ if sl < 16 then
+ sl = 16
+ end
+
+ img2 = _img.new(sl, sl)
+ --img2:clear(BLACK) -- doesn't need cleared since we copy to it entirely
+
+ --[[we are going to resize the image since the data supplied is 32 x 16
+ pixels its really tiny on most screens]]
+ _img.resize(img2, img1)
+
+ img1 = nil
+
+ img3 = _img.new(sl, sl)
+ img3:clear(BLACK)
+
+ if IS_COLOR_TARGET == true then
+ local c_yellow = _clr.set(WHITE, 0xFC, 0xC0, 0x00)
+ local c_grey = _clr.set(WHITE, 0xD4, 0xE3, 0xF3)
+ local c_dkgrey = _clr.set(WHITE, 0xB4, 0xC3, 0xD3)
+ -- if dest pixel == source pixel make dest pixel yellow
+ img3:copy(img2, 1, 1, 1, 1, nil, nil, false, _blit.BDEQS, c_yellow)
+ -- xor src pixel to dest pixel if both are 0 or both are 1 dest = 0
+ img2:copy(img3, 1, 1, 2, 1, nil, nil, false, _blit.BXOR)
+ -- if dest pixel color > src pixel color copy grey to dest
+ img2:copy(img3, 1, 1, 1, 1, nil, nil, false, _blit.BDGTS, c_grey)
+ -- set img3 to grey
+ img3:clear(c_dkgrey)
+ end
+
+ -- make a WHITE square in the middle
+
+ img3:clear(WHITE, 4,4, img3:width() - 3, img3:height() - 3)
+
+ img3:copy(img2, 1, 1, 1, 1, nil, nil, false, _blit.CUSTOM, my_blit)
+ img2 = nil
+ _img_save(img3, "pix.bmp")
+ return img3
+end -- copy_logo
+
+-- draws an olive erm ball and returns it
+function create_ball()
+ local sl -- image size
+ if _lcd.W < _lcd.H then
+ sl = _lcd.W / 5
+ else
+ sl = _lcd.H / 5
+ end
+
+ -- make sl always even by subtracting 1 if needed
+ sl = bit.band(sl, bit.bnot(1))
+ if sl < 16 then
+ sl = 16
+ end
+ local img = _img.new(sl, sl)
+ img:clear(0)
+ _draw.circle_filled(img, sl/2, sl/2, sl/2 - 1, _clr.set(-1, 255), _clr.set(0, 100))
+ _draw.circle_filled(img, sl/3, sl/3, sl/10, _clr.set(-1, 255, 0, 0))
+ return img
+end
+
+-- bounces img around on screen
+function bounce_image(img)
+ local timer = _timer() -- creates a new timer -- saves index
+ local wait
+ -- make a copy of the current screen for later
+ local screen_img = _lcd:duplicate()
+
+ local img_sqy = _img.new(img:width() + img:width() / 8, img:height())
+ local img_sqx = _img.new(img:width(), img:height() + img:height() / 8)
+ _img.resize(img_sqy, img)
+ _img.resize(img_sqx, img)
+
+ -- moves definition of CANCEL_BUTTON from global to local
+ local CANCEL_BUTTON = CANCEL_BUTTON
+--------------------------------------------------------
+ local imgn = img
+ local hold = 0
+ local sx = 1 -- starting x
+ local sy = 1 -- starting y
+
+ local ex = _lcd.W - img:width() - 2
+ local ey = _lcd.H - img:width() - 2
+
+ -- threshold resets speed, inverts image
+ local tx = ex / 5
+ local ty = ey / 5
+
+ local last_x = sx
+ local last_y = sy
+
+ local x = sx
+ local y = sy
+
+ local dx = 1
+ local dy = 1
+ -- negative width\height cause the image to be drawn from the opposite end
+ local fx = _lcd.W
+ local fy = _lcd.H
+
+ local function invert_images()
+ img:invert();
+ img_sqx:invert()
+ img_sqy:invert()
+ end
+
+ local loops = (_lcd.W * _lcd.H) / 2
+ while (loops > 0) do
+
+ if IS_COLOR_TARGET then
+ if bit.band(loops, 128) == 128 then
+ _lcd:copy(imgn, x, y, 1, 1, fx, fy, false, _blit.BOR)
+ _lcd:copy(screen_img, x, y, x, y, imgn:width(), imgn:height(),
+ false, _blit.BDEQC, imgn:get(1,1))
+ else
+ _lcd:copy(imgn, x, y, 1, 1, fx, fy, false, _blit.BSNEC, imgn:get(1,1))
+ end
+ else
+ local blitop
+
+ if imgn:get(1,1) ~= 0 then
+ blitop = _blit.BSNOT
+ else
+ blitop = _blit.BXOR
+ end
+
+ _lcd:copy(imgn, x, y, 1, 1, fx, fy, false, blitop, WHITE)
+ end
+
+ if hold < 1 then
+ imgn = img
+ else
+ hold = hold - 1
+ end
+ _lcd:update()
+
+ x = x + dx
+ y = y + dy
+
+ if y >= ey or y <= sy then
+ dy = (-dy)
+ fy = (-fy)
+ imgn = img_sqy
+ hold = 3
+ if dx < 0 and y < 10 then
+ dx = dx - 5
+ end
+ if dx > tx then
+ dx = 5;
+ dy = 5;
+ invert_images()
+ end
+ end
+
+ if x >= ex or x <= sx then
+ dx = (-dx)
+ fx = (-fx)
+ imgn = img_sqx
+ hold = 3
+ if dy < 0 and x < 10 then
+ dy = dy - 5
+ end
+ if dy > ty then
+ dx = 5;
+ dy = 5;
+ invert_images()
+ end
+ end
+
+ x = _math.clamp(x, sx, ex)
+ y = _math.clamp(y, sy, ey)
+
+ -- copy original image back to screen
+ _lcd:copy(screen_img)
+
+ loops = loops -1
+
+ wait = timer:check(true) --checks timer and updates last time
+ if wait >= 5 then
+ wait = 0
+ elseif wait < 5 then
+ wait = 5 - wait
+ end
+ -- 0 = timeout immediately
+ -- ( -1 would be never timeout, and >0 is amount of 'ticks' before timeout)
+ if rb.get_plugin_action(wait) == CANCEL_BUTTON then
+ break;
+ end
+ end
+
+ timer:stop() -- destroys timer, also returns time since last time
+
+ -- leave the screen how we found it
+ _lcd:copy(screen_img)
+end -- image_bounce
+
+-- draws a gradient using available colors
+function draw_gradient(img, x, y, w, h, direction, clrs)
+ x = x or 1
+ y = y or 1
+ w = w or img:width() - x
+ h = h or img:height() - y
+ local zstep = 0
+ local step = 1
+ if IS_COLOR_TARGET == true then -- Only do this when we're on a color target
+ local z = 1
+ local c = 1
+ clrs = clrs or {255,255,255}
+ local function gradient_rgb(p, c1, c2)
+ -- tried squares of difference but blends were very abrupt
+ local r = c1.r + (p * (c2.r - c1.r) / 10500)
+ local g = c1.g + (p * (c2.g - c1.g) / 10000)
+ local b = c1.b + (p * (c2.b - c1.b) / 09999)
+ return _clr.set(nil, r, g, b)
+ end
+ local function check_z()
+ if z > 10000 and c < #clrs - 1 then
+ z = 1
+ c = c + 1
+ elseif z > 10000 then
+ z = 10000
+ end
+ end
+ if direction == "V" then
+ zstep = math.max(1, (10000 / ((w - 1) / (#clrs - 1)) + bit.band(#clrs, 1)))
+ for i=x, w + x do
+ check_z()
+ _draw.vline(img, i, y, h, gradient_rgb(z, clrs[c], clrs[c + 1]))
+ z = z + zstep
+ end
+ else
+ zstep = math.max(1, (10000 / ((h - 1) / (#clrs - 1)) + bit.band(#clrs, 1)))
+ for j=y, h + y do
+ check_z()
+ _draw.hline(img, x, j, w, gradient_rgb(z, clrs[c], clrs[c + 1]))
+ z = z + zstep
+ end
+ end
+ else -- not a color target but might be greyscale
+ local clr = _clr.set(-1)
+ for i=x, w + x do
+ for j=y, h + y do
+ -- Set the pixel at position i, j to the specified color
+ img:set(i, j, clr)
+ end
+ clr = _clr.inc(clr, 1)
+ end
+ end
+--rb.sleep(1000)
+end -- draw_gradient
+
+function twist(img)
+--[[ local fg
+ if rb.lcd_get_foreground then
+ fg = rb.lcd_get_foreground()
+ end]]
+
+ local ims = {}
+ ims.strip = _img.tile(img, img:width(), _lcd.H + img:height())
+ ims.y_init = {img:height(), 1}
+ ims.y_finl = {1, img:height()}
+ ims.y_inc = {-2, 4}
+ ims.y_pos = nil
+
+ -- together define the width of the overall object
+ local x_off=(_lcd.W/2)
+ local m = _lcd.W
+ local z = -m
+ local zi = 1
+
+ -- angles of rotation for each leaf
+ local ANGLES = {0, 45, 90, 135, 180, 225, 270, 315}
+ local elems = #ANGLES
+ local _XCOORD = {}
+
+ -- color alternates each leaf
+ local colors = { WHITE, _clr.set(0, 0, 0, 0) }
+ local c = 0
+
+ -- calculated position of each point in the sine wave(s)
+ local xs, xe
+
+ --[[--Profiling code
+ local timer = _timer.start()]]
+
+ for rot = 0, 6000, 4 do
+ _lcd:clear(BLACK)
+
+ for y=1, _lcd.H do
+
+ local function get_sines()
+ local sc = m + z
+ if sc == 0 then
+ sc = 1 -- prevent divide by 0
+ elseif sc + z > _lcd.W then
+ zi = -1
+ colors[2] = _clr.inc(colors[2], 1, 0, 50, 0)
+ elseif sc + z < -(_lcd.W) then
+ zi = 1
+ colors[1] = _clr.inc(colors[1], -1, 0, 10, 0)
+ end
+ if colors[2] == colors[1] then
+ colors[2] = _clr.inc(colors[2], 1)
+ end
+ for j = 1, elems do
+ _XCOORD[j] = _math.d_sin(y + ANGLES[j] + rot) / sc + x_off
+ end
+ _XCOORD[0] = _XCOORD[elems] -- loop table for efficient wrap
+ end
+
+ get_sines()
+ for k = 1, elems do
+ xs = _XCOORD[k]
+ xe = _XCOORD[(k+1) % elems]
+ if xs < 1 or xe > _lcd.W then
+ while xs < 1 or xe > _lcd.W do
+ m = m + 1 -- shift m in order to scale object min/max
+ get_sines()
+ xs = _XCOORD[k]
+ xe = _XCOORD[(k+1) % elems]
+ end
+ end
+ c = (c % 2) + 1
+ if xs < xe then
+ -- defines the direction of leaves & fills them
+
+ _lcd:set(xs, y, colors[c])
+ _lcd:set(xe, y, colors[c])
+ _lcd:line(xs + 1, y, xe - 1, y, colors[3 - c], true)
+ end
+ end
+
+ end
+
+ do -- stripes and shifts image strips; blits it into the colors(1) leaves
+ local y
+ local y_col = 1
+ local w = ims.strip:width() - 1
+ local h = ims.strip:height() - 1
+ if ims.y_pos ~= nil then
+ for i = 1, #ims.y_pos do
+ ims.y_pos[i] = ims.y_pos[i] + ims.y_inc[i]
+
+ if (ims.y_inc[i] > 0 and ims.y_pos[i] > ims.y_finl[i])
+ or (ims.y_inc[i] < 0 and ims.y_pos[i] < ims.y_finl[i]) then
+ ims.y_pos[i] = ims.y_init[i]
+ end
+ end
+ else
+ ims.y_pos = {ims.y_init[1], ims.y_init[2]}
+ end
+
+ for ix = 1, _lcd.W, w do
+ y_col = y_col + 1
+ y = ims.y_pos[(y_col % 2) + 1]
+ if _lcd.DEPTH > 1 then
+ _lcd:copy(ims.strip, ix, 1, 1, y, w, h, false, _blit.BDEQC, colors[1])
+ else
+ _lcd:copy(ims.strip, ix, 1, 1, y, w, h, false, _blit.BSAND)
+ end
+ end
+ end
+
+ _lcd:update()
+ z = z + zi
+
+ if rb.get_plugin_action(0) == CANCEL_BUTTON then
+ break
+ end
+ collectgarbage("step")
+ end
+ --[[--Profiling code
+ _print.f("%d", _timer.stop(timer))
+ rb.sleep(rb.HZ * 10)]]
+end -- twist
+
+function draw_target(img)
+
+ local clr = _clr.set(0, 0, 0, 0)
+
+ -- make a copy of original screen for restoration
+ local screen_img = _lcd:duplicate()
+
+ rad_m = math.min(_lcd.W, _lcd.H)
+
+ for s = -_lcd.W /4, 16 do
+ img:copy(screen_img)
+ s = math.max(1, math.abs(s))
+ for r = 1, rad_m /2 - 10, s do
+ clr = _clr.inc(clr, 1, r * 5, r * 10, r * 20)
+ _draw.circle(img, _lcd.CX, _lcd.CY, r, clr)
+ end
+
+ _lcd:update()
+ if rb.get_plugin_action( 20) == CANCEL_BUTTON then
+ z = 16;
+ break;
+ end
+ end
+
+end -- draw_target
+
+function draw_sweep(img, cx, cy, radius, color)
+ local timer = _timer() --creates a new timer saves index
+ local wait
+ local x
+ local y
+ --make a copy of original screen for restoration
+ local screen_img = _lcd:duplicate()
+ _draw.circle(img, cx, cy, radius, color)
+ for d = 630, 270, - 5 do
+ if d % 45 == 0 then
+ img:copy(screen_img)
+ _draw.circle(img, cx, cy, radius, color)
+ l = 0
+ end
+ x = cx + radius * _math.d_cos(d) / 10000
+ y = cy + radius * _math.d_sin(d) / 10000
+
+
+ _draw.line(img, cx, cy, x, y, color)
+ l = l + 1
+ if l > 1 then
+ x1 = cx + (radius - 1) * _math.d_cos(d + 1) / 10000
+ y1 = cy + (radius - 1) * _math.d_sin(d + 1) / 10000
+ _draw_floodfill(img, x1, y1, BLACK, color)
+ end
+ _lcd:update()
+ wait = timer:check(true) --checks timer and updates last time
+ if wait >= 50 then
+ wait = 0
+ elseif wait < 50 then
+ wait = 50 - wait
+ end
+ if rb.get_plugin_action( wait) == CANCEL_BUTTON then
+ break
+ end
+ end
+ timer:stop() --destroys timer, also returns time since last time
+ screen_img = nil
+end -- draw_sweep
+
+function rotate_image(img)
+ local blitop = _blit.BOR
+ local i = 1
+ local d = 0
+ local ximg
+ local x, y, w, h, xr, yr
+
+ ximg = _img.rotate(img, 45) -- image will be largest at this point
+ w = ximg:width()
+ h = ximg:height()
+ xr = (_lcd.W - w) / 2
+ yr = (_lcd.H - h) / 2
+ --make a copy of original screen for restoration
+ local screen_img -- = _lcd:duplicate()
+ screen_img =_img.new(w, h)
+ screen_img :copy(_LCD, 1, 1, xr, yr, w, h)
+ --_print.f("CW")
+
+ --[[--Profiling code
+ local timer = _timer.start()]]
+
+ while d >= 0 do
+ ximg = _img.rotate(img, d)
+ w = ximg:width()
+ h = ximg:height()
+ x = (_lcd.W - w) / 2
+ y = (_lcd.H - h) / 2
+
+ -- copy our rotated image onto the background
+ _lcd:copy(ximg, x, y, 1, 1, w, h, false, blitop)
+ _lcd:update()
+ --restore the portion of the background we destroyed
+ _lcd:copy(screen_img, xr, yr, 1, 1)
+
+ if d > 0 and d % 360 == 0 then
+ _lcd:copy(ximg, x, y, 1, 1, w, h)
+ _lcd:update()
+ if i == 1 then i = 0 end
+ if d == 1440 or i < 0 then
+ if i < 0 then
+ i = i - 5
+ else
+ i = - 5
+ end
+ blitop = _blit.BXOR
+ --_print.f("CCW")
+ --rb.sleep(rb.HZ)
+ else
+ i = i + 5
+ --_print.f("CW")
+ --rb.sleep(rb.HZ)
+ end
+
+ end
+ d = d + i
+
+ if rb.get_plugin_action(0) == CANCEL_BUTTON then
+ break;
+ end
+ end
+
+ _lcd:copy(ximg, x, y, 1, 1, w, h)
+ --[[-- Profiling code
+ _print.f("%d", _timer.stop(timer))
+ rb.sleep(rb.HZ * 10)]]
+end -- rotate_image
+
+-- shows blitting with a mask
+function blit_mask(dst)
+ local timer = _timer()
+ local r = math.min(_lcd.CX, _lcd.CY) / 5
+
+ local bmask = _img.new(_lcd.W, _lcd.H)
+ bmask:clear(0)
+
+ _draw.circle_filled(bmask, _lcd.CX, _lcd.CY, r, WHITE)
+ local color = _clr.set(0, 0, 0 ,0)
+ for z = 0, 100 do
+ z = z + timer:check(true)
+ color = _clr.inc(color, 1, z * 5, z * 10, z * 20)
+ dst:copy(bmask, 1, 1, 1, 1, nil, nil, false, _blit.BSAND, color)
+ _lcd:update()
+
+ if rb.get_plugin_action(0) == CANCEL_BUTTON then
+ break
+ end
+ end
+end -- blit_mask
+
+-- draws an X on the screen
+function draw_x()
+ _draw.line(_LCD, 1, 1, _lcd.W, _lcd.H, WHITE)
+ _draw.line(_LCD, _lcd.W, 1, 1, _lcd.H, WHITE)
+
+ _draw.hline(_LCD, 10, _lcd.CY , _lcd.W - 21, WHITE)
+
+ _draw.vline(_LCD, _lcd.CX, 20 , _lcd.H - 41, WHITE)
+
+ _draw.rect(_LCD, _lcd.CX - 17, _lcd.CY - 17, 34, 34, WHITE)
+ _lcd:update()
+ rb.sleep(100)
+end -- draw_x
+
+--fills an image with random colors
+function random_img(img)
+ local min = _clr.set(0, 0, 0, 0)
+ local max = _clr.set(-1, 255, 255, 255)
+ math.randomseed(rb.current_tick())
+ for x = 1, img:width() do
+ for y = 1, img:height() do
+ img:set(x, y, math.random(min, max))
+ end
+ end
+end -- random_img
+
+function rainbow_img(img)
+--draw a gradient using available colors
+ if IS_COLOR_TARGET == true then
+ --R O Y G B I V
+ clrs = {
+ {r = 255, g = 255, b = 255}, -- white
+ {r = 000, g = 000, b = 000}, -- black
+ {r = 200, g = 000, b = 000}, -- red
+ {r = 255, g = 000, b = 000}, -- red
+ {r = 255, g = 100, b = 033}, -- orange
+ {r = 255, g = 127, b = 000}, -- orange
+ {r = 255, g = 200, b = 033}, -- yellow
+ {r = 255, g = 255, b = 000}, -- yellow
+ {r = 050, g = 255, b = 000}, -- green
+ {r = 000, g = 125, b = 125}, -- green
+ {r = 000, g = 000, b = 255}, -- blue
+ {r = 033, g = 025, b = 200}, -- indigo
+ {r = 075, g = 000, b = 150}, -- indigo
+ {r = 127, g = 000, b = 150}, -- violet
+ {r = 150, g = 000, b = 255}, -- violet
+ {r = 255, g = 255, b = 255}, -- white
+ {r = 000, g = 000, b = 000}, -- black
+ }
+ else
+ end
+ draw_gradient(img, 1, 1, nil, nil, "V", clrs)
+end -- rainbow_img
+
+-- draws a rounded rectangle with text
+function rock_lua()
+ local res, w, h = _lcd:text_extent("W", rb.FONT_UI)
+ w = _lcd.W - 10
+ h = h + 4
+ _draw.rounded_rect_filled(_LCD, 5, 5, w, h, 15, WHITE)
+ _draw_text(_LCD, 5, 5, w, h, nil, BLACK, "ROCKlua!")
+ _lcd:update()
+ rb.sleep(100)
+end -- rock_lua
+
+-- draws a rounded rectangle with long text
+function long_text()
+ local txt = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
+ local res, w, h = _lcd:text_extent(txt, rb.FONT_UI)
+ local resp, wp, hp = _lcd:text_extent(" ", rb.FONT_UI)
+ local wait = 0
+ w = w + wp * 3
+ h = h + 4
+ local img = _img.new(w + 1, h)
+ img:clear(BLACK)
+ _draw.rounded_rect_filled(img, 1, 1, w, h, 15, WHITE)
+ _draw_text(img, 1, 2, nil, nil, nil, BLACK, txt)
+
+ for p = -w + 1, w - 1 do
+ wait = 0
+ p = math.abs(p)
+ _lcd:copy(img, 1, _lcd.H - h, w - p, 1)
+ _lcd:update()
+ if p == 0 or w - p == 1 then wait = 100; rb.sleep(50) end
+ if rb.get_plugin_action(wait) == CANCEL_BUTTON then
+ break
+ end
+ end
+
+end -- long_text
+
+-- creates or loads an image to use as logo
+function get_logo()
+ local logo_img = _img.load("/pix.bmp") --loads the previously saved image (if we saved it before)
+
+ --create a logo if an image wasn't saved previously
+ if(not logo_img) then
+ logo_img = create_logo()
+ end
+
+ --fallback
+ if(not logo_img) then
+ -- Load a BMP file in the variable backdrop
+ local base = "/.rockbox/icons/"
+ local backdrop = _img.load("/image.bmp") --user supplied image
+ or _img.load(base .. "tango_small_viewers.bmp")
+ or _img.load(base .. "tango_small_viewers_mono.bmp")
+ or _img.load(base .. "tango_small_mono.bmp")
+ or _img.load(base .. "tango_icons.16x16.bmp")
+ or _img.load(base .. "tango_icons_viewers.16x16.bmp")
+ or _img.load(base .. "viewers.bmp")
+ or _img.load(base .. "viewers.6x8x1.bmp")
+ or _img.load(base .. "viewers.6x8x2.bmp")
+ or _img.load(base .. "viewers.6x8x10.bmp")
+ or _img.load(base .. "viewers.6x8x16.bmp")
+ logo_img = backdrop
+ end
+ return logo_img
+end -- get_logo
+
+-- uses print_table to display a menu
+function main_menu()
+
+ local mt = {
+ [1] = "Rocklua RLI Example",
+ [2] = "The X",
+ [3] = "Blit Mask",
+ [4] = "Target",
+ [5] = "Sweep",
+ [6] = "Bouncing Ball (olive)",
+ [7] = "The Twist",
+ [8] = "Image Rotation",
+ [9] = "Long Text",
+ [10] = "Rainbow Image",
+ [11] = "Random Image",
+ [12] = "Clear Screen",
+ [13] = "Save Screen",
+ [14] = "Exit"
+ }
+ local ft = {
+ [0] = exit_now, --if user cancels do this function
+ [1] = function(TITLE) return true end, -- shouldn't happen title occupies this slot
+ [2] = function(THE_X) draw_x() end,
+ [3] = function(BLITM) blit_mask(_lcd()) end,
+ [4] = function(TARGT) draw_target(_lcd()) end,
+ [5] = function(SWEEP)
+ local r = math.min(_lcd.CX, _lcd.CY) - 20
+ draw_sweep(_lcd(), _lcd.CX, _lcd.CY, r, _clr.set(-1, 0, 255, 0))
+ end,
+ [6] = function(BOUNC) bounce_image(create_ball()) end,
+ [7] = function(TWIST) twist(get_logo()) end,
+ [8] = function(ROTAT) rotate_image(get_logo()) end,
+ [9] = long_text,
+ [10] = function(RAINB)
+ rainbow_img(_lcd()); _lcd:update(); rb.sleep(rb.HZ)
+ end,
+ [11] = function(RANDM)
+ random_img(_lcd()); _lcd:update(); rb.sleep(rb.HZ)
+ end,
+ [12] = function(CLEAR) _lcd:clear(BLACK); rock_lua() end,
+ [13] = function(SAVEI) _LCD:invert(); _img_save(_LCD, "/rocklua.bmp") end,
+ [14] = function(EXIT_) return true end
+ }
+
+ if _lcd.DEPTH < 2 then
+ table.remove(mt, 10)
+ table.remove(ft, 10)
+ end
+
+ print_menu(mt, ft)
+
+end
+--------------------------------------------------------------------------------
+function exit_now()
+ _lcd:update()
+ _lcd:splashf(rb.HZ * 5, "ran for %d seconds", _timer.stop("main") / rb.HZ)
+ os.exit()
+end -- exit_now
+--------------------------------------------------------------------------------
+
+--MAIN PROGRAM------------------------------------------------------------------
+_timer("main") -- keep track of how long the program ran
+
+-- Clear the screen
+_lcd:clear(BLACK)
+
+if _lcd.DEPTH > 1 then
+--draw a gradient using available colors
+if IS_COLOR_TARGET == true then
+ clrs = {
+ {r = 255, g = 000, b = 000}, -- red
+ {r = 000, g = 255, b = 000}, -- green
+ {r = 000, g = 000, b = 255}, -- blue
+ }
+else
+end
+ local w = bit.rshift(_lcd.W, 2)
+ local h = bit.rshift(_lcd.H, 2)
+ draw_gradient(_lcd(), (_lcd.W - w)/2 - 1, (_lcd.H - h)/3 - 1, w, h, "H", clrs)
+ _lcd:update()
+ rb.sleep(rb.HZ)
+end
+
+do
+local img = _img.load("/rocklua.bmp")
+ if not img then
+ rock_lua()
+ else
+ _lcd:image(img)
+ end
+end
+_lcd:update()
+rb.sleep(rb.HZ / 2)
+
+if rb.cpu_boost then rb.cpu_boost(true) end
+
+main_menu()
+
+if rb.cpu_boost then rb.cpu_boost(false) end
+
+exit_now()
+
+-- For a reference list of all functions available, see apps/plugins/lua/rocklib.c (and apps/plugin.h)