diff options
Diffstat (limited to 'apps/plugins/lua/include_lua/draw.lua')
| -rw-r--r-- | apps/plugins/lua/include_lua/draw.lua | 216 |
1 files changed, 9 insertions, 207 deletions
diff --git a/apps/plugins/lua/include_lua/draw.lua b/apps/plugins/lua/include_lua/draw.lua index 0ee3e93d75..7208b63efb 100644 --- a/apps/plugins/lua/include_lua/draw.lua +++ b/apps/plugins/lua/include_lua/draw.lua @@ -29,7 +29,6 @@ _draw.ellipse_filled _draw.ellipse_rect_filled _draw.ellipse_rect - _draw.flood_fill _draw.hline _draw.image _draw.line @@ -39,7 +38,6 @@ _draw.rect_filled _draw.rounded_rect _draw.rounded_rect_filled - _draw.text _draw.vline ]] @@ -56,21 +54,17 @@ local _draw = {} do setmetatable(_draw, rocklib_image) -- Internal Constants - local _LCD = rb.lcd_framebuffer() - local LCD_W, LCD_H = rb.LCD_WIDTH, rb.LCD_HEIGHT local BSAND = 8 -- blits color to dst if src <> 0 local _NIL = nil -- nil placeholder - local _abs = math.abs + local _clear = rocklib_image.clear local _copy = rocklib_image.copy local _ellipse = rocklib_image.ellipse local _get = rocklib_image.get local _line = rocklib_image.line - local _marshal = rocklib_image.marshal local _min = math.min local _newimg = rb.new_image - local _points = rocklib_image.points -- line _draw.line = function(img, x1, y1, x2, y2, color, bClip) @@ -87,33 +81,22 @@ local _draw = {} do _line(img, x, y, _NIL, y + length, color, bClip) end - -- draws a non-filled figure based on points in t-points - local function polyline(img, x, y, t_points, color, bClosed, bClip) - if #t_points < 2 then error("not enough points", 3) end - - local pt_first_last - - if bClosed then - pt_first_last = t_points[1] - else - pt_first_last = t_points[#t_points] - end - - for i = 1, #t_points, 1 do - local pt1 = t_points[i] - - local pt2 = t_points[i + 1] or pt_first_last-- first and last point - + -- draws a non-filled rect based on points in t-points + local function polyrect(img, x, y, t_points, color, bClip) + local pt_first_last = t_points[1] + local pt1, pt2 + for i = 1, 4, 1 do + pt1 = t_points[i] + pt2 = t_points[i + 1] or pt_first_last-- first and last point _line(img, pt1[1] + x, pt1[2] + y, pt2[1] + x, pt2[2] + y, color, bClip) end - end -- rectangle local function rect(img, x, y, width, height, color, bClip) if width == 0 or height == 0 then return end - polyline(img, x, y, {{0, 0}, {width, 0}, {width, height}, {0, height}}, color, true, bClip) + polyrect(img, x, y, {{0, 0}, {width, 0}, {width, height}, {0, height}}, color, bClip) end @@ -240,190 +223,9 @@ local _draw = {} do _copy(dst, src, x, y, 1, 1, _NIL, _NIL, bClip) end - -- floods an area of targetclr with fillclr x, y specifies the start seed - _draw.flood_fill = function(img, x, y, targetclr, fillclr) - -- scanline 4-way flood algorithm - -- ^ - -- <--------x---> - -- v - -- check that target color doesn't = fill and the first point is target color - if targetclr == fillclr or targetclr ~= _get(img, x, y, true) then return end - local max_w = img:width() - local max_h = img:height() - - local qpt = {} -- FIFO queue - -- rather than moving elements around in our FIFO queue - -- for each read; increment 'qhead' by 2 - -- set both elements to nil and let the - -- garbage collector worry about it - -- for each write; increment 'qtail' by 2 - -- x coordinates are in odd indices while - -- y coordinates are in even indices - - local qtail = 0 - - local function check_ns(val, x, y) - if targetclr == val then - y = y - 1 - if targetclr == _get(img, x, y, true) then -- north - qtail = qtail + 2 - qpt[qtail - 1] = x - qpt[qtail] = y - end - y = y + 2 - if targetclr == _get(img, x, y, true) then -- south - qtail = qtail + 2 - qpt[qtail - 1] = x - qpt[qtail] = y - end - return fillclr - end - return _NIL -- signal marshal to stop - end - - local function seed_pt(x, y) - -- should never hit max but make sure not to end early - for qhead = 2, 0x40000000, 2 do - - if targetclr == _get(img, x, y, true) then - _marshal(img, x, y, 1, y, _NIL, _NIL, true, check_ns) -- west - _marshal(img, x + 1, y, max_w, y, _NIL, _NIL, true, check_ns) -- east - end - - x = qpt[qhead - 1] - qpt[qhead - 1] = _NIL - - if not x then break end - - y = qpt[qhead] - qpt[qhead] = _NIL - end - end - - seed_pt(x, y) -- Begin - end -- flood_fill - - -- draws a closed figure based on points in t_points - _draw.polygon = function(img, x, y, t_points, color, fillcolor, bClip) - if #t_points < 2 then error("not enough points", 3) end - - if fillcolor then - local x_min, x_max = 0, 0 - local y_min, y_max = 0, 0 - local w, h = 0, 0 - -- find boundries of polygon - for i = 1, #t_points, 1 do - local pt = t_points[i] - if pt[1] < x_min then x_min = pt[1] end - if pt[1] > x_max then x_max = pt[1] end - if pt[2] < y_min then y_min = pt[2] end - if pt[2] > y_max then y_max = pt[2] end - end - w = _abs(x_max) + _abs(x_min) - h = _abs(y_max) + _abs(y_min) - x_min = x_min - 2 -- leave a border to use flood_fill - y_min = y_min - 2 - - local fill_img = _newimg(w + 3, h + 3) - _clear(fill_img, 0x1) - - for i = 1, #t_points, 1 do - local pt1 = t_points[i] - local pt2 = t_points[i + 1] or t_points[1]-- first and last point - _line(fill_img, pt1[1] - x_min, pt1[2] - y_min, - pt2[1]- x_min, pt2[2] - y_min, 0) - - end - _draw.flood_fill(fill_img, fill_img:width(), fill_img:height() , 0x1, 0x0) - _copy(img, fill_img, x - 1, y - 1, _NIL, _NIL, _NIL, _NIL, bClip, BSAND, fillcolor) - end - - polyline(img, x, y, t_points, color, true, bClip) - end - - -- draw text onto image if width/height are supplied text is centered - _draw.text = function(img, x, y, width, height, font, color, text) - font = font or rb.FONT_UI - - local opts = {x = 0, y = 0, width = LCD_W - 1, height = LCD_H - 1, - font = font, drawmode = 3, fg_pattern = 0x1, bg_pattern = 0} - - if rb.LCD_DEPTH == 2 then -- invert 2-bit screens - --vp.drawmode = bit.bxor(vp.drawmode, 4) - opts.fg_pattern = 3 - opts.fg_pattern - opts.bg_pattern = 3 - opts.bg_pattern - end - rb.set_viewport(opts) - - local res, w, h = rb.font_getstringsize(text, font) - - if not width then - width = 0 - else - width = (width - w) / 2 - end - - if not height then - height = 0 - else - height = (height - h) / 2 - end - - -- make a copy of the current screen for later - local screen_img = _newimg(LCD_W, LCD_H) - _copy(screen_img, _LCD) - - -- check if the screen buffer is supplied image if so set img to the copy - if img == _LCD then - img = screen_img - end - - -- we will be printing the text to the screen then blitting into img - rb.lcd_clear_display() - - if w > LCD_W then -- text is too long for the screen do it in chunks - local l = 1 - local resp, wp, hp - local lenr = text:len() - - while lenr > 1 do - l = lenr - resp, wp, hp = rb.font_getstringsize(text:sub(1, l), font) - - while wp >= LCD_W and l > 1 do - l = l - 1 - resp, wp, hp = rb.font_getstringsize(text:sub( 1, l), font) - end - - rb.lcd_putsxy(0, 0, text:sub(1, l)) - text = text:sub(l) - - if x + width > img:width() or y + height > img:height() then - break - end - - -- using the mask we made blit color into img - _copy(img, _LCD, x + width, y + height, _NIL, _NIL, _NIL, _NIL, false, BSAND, color) - x = x + wp - rb.lcd_clear_display() - lenr = text:len() - end - else --w <= LCD_W - rb.lcd_putsxy(0, 0, text) - - -- using the mask we made blit color into img - _copy(img, _LCD, x + width, y + height, _NIL, _NIL, _NIL, _NIL, false, BSAND, color) - end - - _copy(_LCD, screen_img) -- restore screen - rb.set_viewport() -- set viewport default - return res, w, h - end - -- expose internal functions to the outside through _draw table _draw.hline = hline _draw.vline = vline - _draw.polyline = polyline _draw.rect = rect _draw.rounded_rect = rounded_rect end -- _draw functions |