FS#11922: Lua game - Pixel Painter

* Changed keymaps to PLA and added to SOURCES and CATEGORIES file
* improved keymaps: implement wrap-around and key repeat
* change keymap according to screen orientation
* fix font size calculation
* use blocking button query in main loop
* replace tabs with spaces
* added manual entry
* added original author to CREDITS

Change-Id: Id67ae99cbb7a737c7f4608e278b77a389ac2ffa6

apps/plugins/CATEGORIES

@@ -72,6 +72,7 @@ pegbox,games
 periodic_table,apps
 pictureflow,demos
 pitch_detector,apps
+pixel-painter,games
 plasma,demos
 png,viewers
 gif,viewers

apps/plugins/SOURCES

@@ -149,7 +149,10 @@ metronome.c
 /* Lua needs at least 160 KB to work in */
 #if PLUGIN_BUFFER_SIZE >= 0x80000
 boomshine.lua
-#endif
+#ifdef HAVE_LCD_COLOR
+pixel-painter.lua
+#endif /* HAVE_LCD_COLOR */
+#endif /* PLUGIN_BUFFER_SIZE >= 0x80000 */
 
 rockblox1d.c
 brickmania.c

apps/plugins/pixel-painter.lua

@@ -0,0 +1,701 @@
+--[[
+             __________               __   ___.
+   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+                     \/            \/     \/    \/            \/
+ $Id$
+
+ Port and extension of Pixel Painter by Pavel Bakhilau
+ (http://js1k.com/2010-first/demo/453) to Rockbox Lua.
+
+ Copyright (C) 2011 by Stefan Schneider-Kennedy
+
+ 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.
+
+]]--
+
+--Number of colours used in the game
+--Hard coded here, in the COLOURS and PIP_COLOURS definitions and in
+--get_colours_count's count_table
+NUM_COLOURS = 6
+
+--Utility function makes a copy of the passed table
+function deepcopy(object)
+    local lookup_table = {}
+    local function _copy(object)
+        if type(object) ~= "table" then
+            return object
+        elseif lookup_table[object] then
+            return lookup_table[object]
+        end
+        local new_table = {}
+        lookup_table[object] = new_table
+        for index, value in pairs(object) do
+            new_table[_copy(index)] = _copy(value)
+        end
+        return setmetatable(new_table, getmetatable(object))
+    end
+    return _copy(object)
+end
+
+--Returns the maximum value of the passed table and its index
+function table_maximum(a)
+    local mi = 1
+    local m = a[mi]
+    for i, val in ipairs(a) do
+        if val > m then
+            mi = i
+            m = val
+        end
+    end
+    return m, mi
+end
+
+--Solves the board using a simple algorithm and returns the number of
+--moves required. Each turn, the function picks the move which fills in
+--the greatest area of board. The number of moves required to complete
+--it is returned.
+function calculate_par(board)
+    local board_dimension = table.getn(board)
+    local test_game_copy = deepcopy(board)
+    local moves = 0
+
+    repeat
+        local non_matching = {}
+        fill_board(test_game_copy, 0, 1, 1, test_game_copy[1][1], non_matching)
+
+        if table.getn(non_matching) > 0 then
+            local count_table = get_colours_count(test_game_copy, non_matching)
+            local max_value, colour = table_maximum(count_table)
+
+            --Corrects the invalid colour values set by
+            --get_colours_count, this also acts as a move
+            for x=1,board_dimension do
+                for y=1,board_dimension do
+                    if test_game_copy[x][y] < 0 then
+                    test_game_copy[x][y] = test_game_copy[x][y] * -1
+                    elseif test_game_copy[x][y] == 0 then
+                    test_game_copy[x][y] = colour
+                    end
+                end
+            end
+        else
+            return moves
+        end
+        --Manual garbage collection is needed so it doesn't eat into the
+        --audio buffer, see http://forums.rockbox.org/index.php/topic,27120.msg177434.html
+        collectgarbage("collect")
+        moves = moves + 1
+    until false
+end
+
+--Calculates the number of blocks of each colour adjacent to the filled
+--region identified by the passed parameters. A colour indexed table
+--containing the counts is returned. Relies on the board having been
+--flood filled with 0s prior to executing this function.
+--
+--The 'board' table is also adjusted as follows: The filled region's
+--colour index is set to zero and each of the adjacent areas' colour
+--indexes are multiplied by -1. These invalid colour values are later
+--corrected in the calculate_par function.
+function get_colours_count(board, non_matching)
+    local count_table = {0, 0, 0, 0, 0, 0}
+    repeat
+        --Pop the array
+        local current = non_matching[table.getn(non_matching)]
+        table.remove(non_matching)
+        --Check this square hasn't already been filled
+        local curr_colour = board[current[1]][current[2]]
+        if curr_colour > 0 then
+            count_table[curr_colour] = count_table[curr_colour] +
+                fill_board(board, curr_colour * -1, current[1], current[2], curr_colour)
+        end
+    until table.getn(non_matching) == 0
+
+    return count_table
+end
+
+--Returns a randomly coloured board of the indicated dimensions
+function generate_board(board_dimension, seed)
+    math.randomseed(seed)
+
+    local board = {}
+    for x=1,board_dimension do
+        board[x] = {}
+        for y=1,board_dimension do
+            board[x][y] = math.random(1,NUM_COLOURS)
+        end
+    end
+
+    return board
+end
+
+--Flood fills the board from the top left using selected_colour
+--Returns the number of boxes filled
+function fill_board(board, fill_colour, x, y, original_colour, non_matching)
+    local board_dimension = table.getn(board)
+    if x > 0 and y > 0 and x <= board_dimension and y <= board_dimension then
+        if board[x][y] == original_colour then
+            board[x][y] = fill_colour
+            return fill_board(board, fill_colour, x - 1, y, original_colour, non_matching) +
+                   fill_board(board, fill_colour, x, y - 1, original_colour, non_matching) +
+                   fill_board(board, fill_colour, x + 1, y, original_colour, non_matching) +
+                   fill_board(board, fill_colour, x, y + 1, original_colour, non_matching) + 1
+        elseif(non_matching ~= nil and board[x][y] ~= fill_colour) then
+            table.insert(non_matching, {x,y})
+        end
+    end
+
+    return 0
+end
+
+--Checks whether the given board is a single colour
+function check_win(board)
+    for x,col in pairs(board) do
+        for y,value in pairs(col) do
+            if value ~= board[1][1] then
+                return false
+            end
+        end
+    end
+
+    return true
+end
+
+--Attempt to load the game variables stored in the indicated save file.
+--Returns a table containing game variables if the file can be opened,
+--false otherwise.
+--Table keys are: difficulty, par, move_number, selected_colour, board
+function load_game(filename)
+    local f = io.open(filename, "r")
+    if f ~= nil then
+        local rtn = {}
+        rtn["difficulty"] = tonumber(f:read())
+        rtn["par"] = tonumber(f:read())
+        rtn["move_number"] = tonumber(f:read())
+        rtn["selected_colour"] = tonumber(f:read())
+
+        local board={}
+        local dimension = diff_to_dimension(rtn["difficulty"])
+        for x=1,dimension do
+            board[x] = {}
+            local line = f:read()
+            local bits = {line:match(("([^ ]*) "):rep(dimension))}
+            for y=1,dimension do
+                board[x][y] = tonumber(bits[y])
+            end
+        end
+        rtn["board"] = board
+
+        f:close()
+        return rtn
+    else
+        return false
+    end
+end
+
+--Saves the game state to file
+function save_game(state, filename)
+    local f = io.open(filename, "w")
+    if f ~= nil then
+        f:write(state["difficulty"],"\n")
+        f:write(state["par"],"\n")
+        f:write(state["move_number"],"\n")
+        f:write(state["selected_colour"],"\n")
+        local board = state["board"]
+        local dimension = diff_to_dimension(state["difficulty"])
+        for x=1,dimension do
+            for y=1,dimension do
+                f:write(board[x][y]," ")
+            end
+            f:write("\n")
+        end
+        f:close()
+        return true
+    else
+        return false
+    end
+end
+
+--Loads the high scores from file
+--Returns true on success, false otherwise
+function load_scores(filename)
+    local f = io.open(filename, "r")
+    if f ~= nil then
+        local highscores = {}
+        for i=1,3 do
+            local line = f:read()
+            local value = false
+            if line ~= nil then
+                value = tonumber(line)
+            end
+
+            highscores[i] = value
+        end
+        f:close()
+        return highscores
+    else
+        return false
+    end
+end
+
+--Saves the high scores to file
+function save_scores(highscores, filename)
+    local f = io.open(filename, "w")
+    if f ~= nil then
+        for i=1,3 do
+            local value = highscores[i]
+            if value == false then
+                value = ""
+            end
+            f:write(value,"\n")
+        end
+        f:close()
+        return true
+    else
+        return false
+    end
+end
+
+function diff_to_dimension(difficulty)
+    if difficulty == 1 then
+        return 8
+    elseif difficulty == 2 then
+        return 16
+    else
+        return 22
+    end
+end
+
+--Don't run the RB stuff if we're not running under RB
+if rb ~= nil then
+
+    if rb.lcd_rgbpack == nil then
+        rb.splash(2*rb.HZ, "Non RGB targets not currently supported")
+        os.exit()
+    end
+
+    ---------------------
+    --RB Game variables--
+    ---------------------
+
+    --The colours used by the game
+    COLOURS = {
+        rb.lcd_rgbpack(255, 119, 34),
+        rb.lcd_rgbpack(255, 255, 102),
+        rb.lcd_rgbpack(119, 204, 51),
+        rb.lcd_rgbpack(102, 170, 255),
+        rb.lcd_rgbpack(51, 68, 255),
+        rb.lcd_rgbpack(51, 51, 51),
+    }
+    --The colour of the selection pip
+    PIP_COLOURS = {
+        rb.lcd_rgbpack(0, 0, 0),
+        rb.lcd_rgbpack(0, 0, 0),
+        rb.lcd_rgbpack(0, 0, 0),
+        rb.lcd_rgbpack(0, 0, 0),
+        rb.lcd_rgbpack(0, 0, 0),
+        rb.lcd_rgbpack(255, 255, 255),
+    }
+    DEFAULT_DIFFICULTY = 2 --1: Easy, 2: Normal, 3: Hard
+
+    FILES_ROOT = "/.rockbox/rocks/games/"
+    SCORES_FILE = FILES_ROOT.."pixel-painter.score"
+    SAVE_FILE = FILES_ROOT.."pixel-painter.save"
+    r,w,TEXT_LINE_HEIGHT = rb.font_getstringsize(" ", rb.FONT_UI) --Get font height
+    --Determine which layout to use by considering the screen dimensions
+    --the +9 is so we have space for the chooser
+    if rb.LCD_WIDTH > (rb.LCD_HEIGHT + 9) then
+        LAYOUT = 1 --Wider than high, status and chooser on right
+    elseif rb.LCD_HEIGHT > (rb.LCD_WIDTH + 9) then
+        LAYOUT = 2 --Higher than wide, status and chooser below
+    else
+        LAYOUT = 3 --Treat like a square screen, chooser on right, status below
+    end
+
+    --Display variables
+    chooser_pip_dimension = 6 --pixel dimension of the selected colour pip
+    block_width = 0 --pixel dimension of each game square
+    chooser_start_pos = 0 --x or y position of the first block (depending on LAYOUT)
+
+    --Populated by load_scores()
+    highscores = {false, false, false}
+
+    --A table containing the game state, initialised by init_game() or
+    --load_game(), see
+    game_state = {}
+
+    -----------------------------------
+    --Display and interface functions--
+    -----------------------------------
+
+    --Sets up a new game and display variables for the indicated
+    --difficulty
+    function init_game(difficulty)
+        init_display_variables(difficulty)
+        local state = {}
+        local board_dimension = diff_to_dimension(difficulty)
+        state["selected_colour"] = 1
+        state["move_number"] = 0
+        state["difficulty"] = difficulty
+        state["board"] = generate_board(board_dimension, rb.current_tick()+os.time())
+        rb.splash(1, "Calculating par...") --Will stay on screen until it's done
+        state["par"] = calculate_par(state["board"])
+
+        return state
+    end
+
+    --Initialises the display variables for the screen LAYOUT
+    function init_display_variables(difficulty)
+        local board_dimension = diff_to_dimension(difficulty)
+
+        if LAYOUT == 1 then
+            block_width = rb.LCD_HEIGHT / board_dimension
+            chooser_start_pos = (board_dimension)*block_width + 2
+            chooser_width = rb.LCD_WIDTH - chooser_start_pos
+            chooser_height = (rb.LCD_HEIGHT - 3*TEXT_LINE_HEIGHT) / NUM_COLOURS
+        elseif LAYOUT == 2 then
+            block_width = rb.LCD_WIDTH / board_dimension
+            chooser_start_pos = board_dimension*block_width + 2 + TEXT_LINE_HEIGHT
+            chooser_width = rb.LCD_WIDTH / NUM_COLOURS
+            chooser_height = rb.LCD_HEIGHT - chooser_start_pos
+        else
+            if TEXT_LINE_HEIGHT > 9 then
+                block_width = (rb.LCD_HEIGHT - TEXT_LINE_HEIGHT) / board_dimension
+            else
+                block_width = (rb.LCD_HEIGHT - 9) / board_dimension
+            end
+            chooser_start_pos = (board_dimension)*block_width + 1
+            chooser_width = rb.LCD_WIDTH - chooser_start_pos
+            chooser_height = (rb.LCD_HEIGHT - TEXT_LINE_HEIGHT) / NUM_COLOURS
+        end
+    end
+
+    --Draws the game board to screen
+    function draw_board(board)
+        for x,col in pairs(board) do
+            for y,value in pairs(col) do
+                rb.lcd_set_foreground(COLOURS[value])
+                rb.lcd_fillrect((x-1)*block_width, (y-1)*block_width, block_width, block_width)
+            end
+        end
+    end
+
+    --Draw the colour chooser along with selected pip at the appropriate
+    --position
+    function draw_chooser(selected_colour)
+        for i=1,NUM_COLOURS do
+            rb.lcd_set_foreground(COLOURS[i])
+            if LAYOUT == 1 or LAYOUT == 3 then
+                rb.lcd_fillrect(chooser_start_pos, (i - 1)*(chooser_height), chooser_width, chooser_height)
+            elseif LAYOUT == 2 then
+                rb.lcd_fillrect((i - 1)*(chooser_width), chooser_start_pos, chooser_width, chooser_height)
+            end
+        end
+
+        rb.lcd_set_foreground(PIP_COLOURS[selected_colour])
+        local xpos = 0
+        local ypos = 0
+        if LAYOUT == 1 or LAYOUT == 3 then
+            xpos = chooser_start_pos + (chooser_width - chooser_pip_dimension)/2
+            ypos = (selected_colour-1)*(chooser_height) + (chooser_height - chooser_pip_dimension)/2
+        elseif LAYOUT == 2 then
+            xpos = (selected_colour-1)*(chooser_width) + (chooser_width - chooser_pip_dimension)/2
+            ypos = chooser_start_pos + (chooser_height - chooser_pip_dimension)/2
+        end
+        rb.lcd_fillrect(xpos, ypos, chooser_pip_dimension, chooser_pip_dimension)
+    end
+
+    --Draws the current moves, par and high score
+    function draw_status(move_number, par, highscore)
+        local strings = {"Move", move_number, "Par", par}
+        if highscore then
+            table.insert(strings, "Best")
+            table.insert(strings, highscore)
+        end
+
+        if LAYOUT == 1 then
+            local function calc_string(var_len_str, static_str)
+                local avail_width = chooser_width - rb.font_getstringsize(static_str, rb.FONT_UI)
+                local rtn_str = ""
+
+                for i=1,string.len(var_len_str) do
+                    local c = string.sub(var_len_str, i, i)
+                    local curr_width = rb.font_getstringsize(rtn_str, rb.FONT_UI)
+                    local width = rb.font_getstringsize(c, rb.FONT_UI)
+
+                    if curr_width + width <= avail_width then
+                        rtn_str = rtn_str .. c
+                    else
+                        break
+                    end
+                end
+
+                return rtn_str, rb.font_getstringsize(rtn_str, rb.FONT_UI)
+            end
+
+            local height = NUM_COLOURS*chooser_height
+            colon_width = rb.font_getstringsize(": ", rb.FONT_UI)
+            for i = 1,table.getn(strings),2 do
+                local label, label_width = calc_string(strings[i], ": "..strings[i+1])
+
+                rb.lcd_set_foreground(rb.lcd_rgbpack(255,0,0))
+                rb.lcd_putsxy(chooser_start_pos, height, label..": ")
+                rb.lcd_set_foreground(rb.lcd_rgbpack(255,255,255))
+                rb.lcd_putsxy(chooser_start_pos + label_width + colon_width, height, strings[i+1])
+                height = height + TEXT_LINE_HEIGHT
+            end
+        else
+            local text_ypos = 0
+            if LAYOUT == 2 then
+                text_ypos = chooser_start_pos - TEXT_LINE_HEIGHT - 1
+            else
+                text_ypos = rb.LCD_HEIGHT - TEXT_LINE_HEIGHT
+            end
+            space_width = rb.font_getstringsize(" ", rb.FONT_UI)
+            local xpos = 0
+            for i = 1,table.getn(strings),2 do
+                rb.lcd_set_foreground(rb.lcd_rgbpack(255,0,0))
+                rb.lcd_putsxy(xpos, text_ypos, strings[i]..": ")
+                xpos = xpos + rb.font_getstringsize(strings[i]..": ", rb.FONT_UI)
+                rb.lcd_set_foreground(rb.lcd_rgbpack(255,255,255))
+                rb.lcd_putsxy(xpos, text_ypos, strings[i+1])
+                xpos = xpos + rb.font_getstringsize(strings[i+1], rb.FONT_UI) + space_width
+            end
+        end
+    end
+
+    --Convenience function to redraw the whole board to screen
+    function redraw_game(game_state, highscores)
+        rb.lcd_clear_display()
+        draw_board(game_state["board"])
+        draw_chooser(game_state["selected_colour"])
+        draw_status(game_state["move_number"], game_state["par"],
+            highscores[game_state["difficulty"]])
+        rb.lcd_update()
+    end
+
+
+    --Draws help to screen, waits for a keypress to exit
+    function app_help()
+        rb.lcd_clear_display()
+
+        local title = "Pixel painter help"
+        local rtn, title_width, h = rb.font_getstringsize(title, rb.FONT_UI)
+        local title_xpos = (rb.LCD_WIDTH - title_width) / 2
+        local space_width = rb.font_getstringsize(" ", rb.FONT_UI)
+
+        --Draw title
+        function draw_text(y_offset)
+            rb.lcd_set_foreground(rb.lcd_rgbpack(255,0,0))
+            rb.lcd_putsxy(title_xpos, y_offset, title)
+            rb.lcd_hline(title_xpos, title_xpos + title_width, TEXT_LINE_HEIGHT + y_offset)
+            rb.lcd_set_foreground(rb.lcd_rgbpack(255,255,255))
+
+            local body_text = [[
+The aim is to fill the screen with a single colour. Each move you select a new colour which is then filled in from the top left corner.
+
+The bottom right displays the number of moves taken, the number of moves used by the computer and your best score relative to the computer's.
+        ]]
+            local body_len = string.len(body_text)
+
+            --Draw body text
+            local word_buffer = ""
+            local xpos = 0
+            local ypos = TEXT_LINE_HEIGHT * 2
+            for i=1,body_len do
+                local c = string.sub(body_text, i, i)
+                if c == " " or c == "\n" then
+                    local word_length = rb.font_getstringsize(word_buffer, rb.FONT_UI)
+                    if (xpos + word_length) > rb.LCD_WIDTH then
+                        xpos = 0
+                        ypos = ypos + TEXT_LINE_HEIGHT
+                    end
+                    rb.lcd_putsxy(xpos, ypos + y_offset, word_buffer)
+
+                    word_buffer = ""
+                    if c == "\n" then
+                        xpos = 0
+                        ypos = ypos + TEXT_LINE_HEIGHT
+                    else
+                        xpos = xpos + word_length + space_width
+                    end
+                else
+                    word_buffer = word_buffer .. c
+                end
+            end
+
+            rb.lcd_update()
+
+            return ypos
+        end
+
+        --Deal with scrolling the help
+        local y_offset = 0
+        local max_y_offset = math.max(draw_text(y_offset) - rb.LCD_HEIGHT, 0)
+        local exit = false
+        repeat
+            local action = rb.get_plugin_action(0)
+            if action == rb.actions.PLA_DOWN then
+                y_offset = math.max(-max_y_offset, y_offset - TEXT_LINE_HEIGHT)
+            elseif action == rb.actions.PLA_UP then
+                y_offset = math.min(0, y_offset + TEXT_LINE_HEIGHT)
+            elseif action == rb.actions.PLA_LEFT or
+                action == rb.actions.PLA_RIGHT or
+                action == rb.actions.PLA_SELECT or
+                action == rb.actions.PLA_EXIT or
+                action == rb.actions.PLA_CANCEL then
+                --This explicit enumeration is needed for targets like
+                --the iriver which send more than one action when
+                --scrolling
+
+                exit = true
+            end
+            rb.lcd_clear_display()
+            draw_text(y_offset)
+        until exit == true
+    end
+
+    --Draws the application menu and handles its logic
+    function app_menu()
+        local options = {"Resume game", "Start new game", "Change difficulty",
+            "Help", "Quit without saving", "Quit"}
+        local item = rb.do_menu("Pixel painter menu", options, nil, false)
+
+        if item == 0 then
+            redraw_game(game_state, highscores)
+        elseif item == 1 then
+            os.remove(SAVE_FILE)
+            game_state = init_game(game_state["difficulty"])
+            redraw_game(game_state, highscores)
+        elseif item == 2 then
+            local diff = rb.do_menu("Difficulty", {"Easy", "Medium", "Hard"}, game_state["difficulty"] - 1, false)
+            if diff < 0 then
+                app_menu()
+            else
+                local difficulty = diff + 1 --lua is 1 indexed
+                os.remove(SAVE_FILE)
+                game_state = init_game(difficulty)
+                redraw_game(game_state, highscores)
+            end
+        elseif item == 3 then
+            app_help()
+            redraw_game(game_state, highscores)
+        elseif item == 4 then
+            os.remove(SAVE_FILE)
+            os.exit()
+        elseif item == 5 then
+            rb.splash(1, "Saving game...") --Will stay on screen till the app exits
+            save_game(game_state,SAVE_FILE)
+            os.exit()
+        end
+    end
+
+    --Determine what victory text to show depending on the relation of the
+    --score to the calculated par value
+    function win_text(delta)
+        if delta < 0 then
+            return "You were "..(-1*delta).." under par"
+        elseif delta > 0 then
+            return "You were "..delta.." over par"
+        else
+            return "You attained par"
+        end
+    end
+
+    ------------------
+    --Game main loop--
+    ------------------
+
+    --Gives the option of testing things without running the game, use:
+    --as_library=true
+    --dofile('pixel-painter.lua')
+    if not as_library then
+        game_state = load_game(SAVE_FILE)
+        if game_state then
+            init_display_variables(game_state["difficulty"])
+        else
+            game_state = init_game(DEFAULT_DIFFICULTY)
+        end
+        loaded_scores = load_scores(SCORES_FILE)
+        if loaded_scores then
+            highscores = loaded_scores
+        end
+        redraw_game(game_state, highscores)
+
+        require("actions")
+        --Set the keys to use for scrolling the chooser
+        if LAYOUT == 1 or LAYOUT == 3 then              -- landscape and square screens
+            prev_action = rb.actions.PLA_UP
+            prev_action_repeat = rb.actions.PLA_UP_REPEAT
+            next_action = rb.actions.PLA_DOWN
+            next_action_repeat = rb.actions.PLA_DOWN_REPEAT
+        else                                            -- portrait screens
+            prev_action = rb.actions.PLA_LEFT
+            prev_action_repeat = rb.actions.PLA_LEFT_REPEAT
+            next_action = rb.actions.PLA_RIGHT
+            next_action_repeat = rb.actions.PLA_RIGHT_REPEAT
+        end
+
+        repeat
+            local action = rb.get_plugin_action(-1) -- TIMEOUT_BLOCK
+
+            if action == rb.actions.PLA_SELECT then
+                --Ensure the user has changed the colour before allowing move
+                --TODO: Check that the move would change the board
+
+                if game_state["selected_colour"] ~= game_state["board"][1][1] then
+                    fill_board(game_state["board"], game_state["selected_colour"],
+                        1, 1, game_state["board"][1][1])
+                    game_state["move_number"] = game_state["move_number"] + 1
+                    redraw_game(game_state, highscores)
+
+                    if check_win(game_state["board"]) then
+                        local par_diff = game_state["move_number"] - game_state["par"]
+                        if not highscores[game_state["difficulty"]] or
+                            par_diff < highscores[game_state["difficulty"]] then
+                            --
+                            rb.splash(3*rb.HZ, win_text(par_diff)..", a new high score!")
+                            highscores[game_state["difficulty"]] = par_diff
+                            save_scores(highscores, SCORES_FILE)
+                        else
+                            rb.splash(3*rb.HZ, win_text(par_diff)..".")
+                        end
+                        os.remove(SAVE_FILE)
+                        os.exit()
+                    end
+                else
+                    --Will stay on screen until they move
+                    rb.splash(1, "Invalid move (wouldn't change board). Change colour to continue.")
+                end
+            elseif action == next_action or action == next_action_repeat then
+                if game_state["selected_colour"] < NUM_COLOURS then
+                    game_state["selected_colour"] = game_state["selected_colour"] + 1
+                else
+                    game_state["selected_colour"] = 1
+                end
+                redraw_game(game_state, highscores)
+            elseif action == prev_action or action == prev_action_repeat then
+                if game_state["selected_colour"] > 1 then
+                    game_state["selected_colour"] = game_state["selected_colour"] - 1
+                else
+                    game_state["selected_colour"] = NUM_COLOURS
+                end
+                redraw_game(game_state, highscores)
+            elseif action == rb.actions.PLA_CANCEL then
+                app_menu()
+            end
+        until action == rb.actions.PLA_EXIT
+        --This is executed if the user presses PLA_EXIT
+        rb.splash(1, "Saving game...") --Will stay on screen till the app exits
+        save_game(game_state,SAVE_FILE)
+    end
+end

docs/CREDITS

@@ -657,6 +657,7 @@ Adam Sampson
 William Wilgus
 Igor Skochinsky
 Sebastiano Pistore
+Stefan Schneider-Kennedy
 
 The libmad team
 The wavpack team

manual/plugins/main.tex

@@ -70,6 +70,8 @@ text files%
 
 \opt{lcd_bitmap}{\input{plugins/pegbox.tex}}
 
+\opt{lcd_color}{\opt{large_plugin_buffer}{\input{plugins/pixelpainter.tex}}}
+
 \opt{lcd_bitmap}{\input{plugins/pong.tex}}
 
 \opt{lcd_bitmap}{\input{plugins/reversi.tex}}

manual/plugins/pixelpainter.tex

@@ -0,0 +1,24 @@
+\subsection{Pixel Painter}
+\screenshot{plugins/images/ss-pixelpainter}{Pixel Painter}{img:pixelpainter}
+This game is written in LUA and based on the game of the same name by
+Pavel Bakhilau (\url{http://js1k.com/2010-first/demo/453}).
+
+Select a colour to flood-fill the board with that colour, starting from the
+top-left pixel (meaning that any pixel which is connected to the top-left
+through other pixels of the same colour will be changed to the selected colour).
+Try to paint the entire board with as few moves as possible.
+
+\begin{btnmap}
+    \ifnum\dapdisplaywidth<\dapdisplayheight
+        \PluginLeft{} / \PluginRight
+    \else
+        \PluginUp{} / \PluginDown
+    \fi
+    & Move colour selector\\
+
+    \PluginSelect
+    & Fill screen with selected colour\\
+
+    \PluginCancel, \PluginExit
+    & Enter game menu\\
+\end{btnmap}