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A modern, network-enabled music player platform built on Rockbox technology. rockboxd.tsiry-sandratraina.com
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--[[ Exposed Functions
_draw.circle _draw.circle_filled _draw.ellipse _draw.ellipse_filled _draw.ellipse_rect_filled _draw.ellipse_rect _draw.hline _draw.image _draw.line _draw.polygon _draw.polyline _draw.rect _draw.rect_filled _draw.rounded_rect _draw.rounded_rect_filled _draw.vline
]]
--[[ bClip allows drawing out of bounds without raising an error it is slower than having a correctly bounded figure, but can be helpful in some cases..]]
if not rb.lcd_framebuffer then rb.splash(rb.HZ, "No Support!") return nil end
local _draw = {} do
local rocklib_image = getmetatable(rb.lcd_framebuffer()) setmetatable(_draw, rocklib_image)
-- Internal Constants local BSAND = 8 -- blits color to dst if src <> 0 local _NIL = nil -- nil placeholder
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 _min = math.min local _newimg = rb.new_image
-- line _draw.line = function(img, x1, y1, x2, y2, color, bClip) _line(img, x1, y1, x2, y2, color, bClip) end
-- horizontal line; x, y define start point; length in horizontal direction local function hline(img, x, y , length, color, bClip) _line(img, x, y, x + length, _NIL, color, bClip) end
-- vertical line; x, y define start point; length in vertical direction local function vline(img, x, y , length, color, bClip) _line(img, x, y, _NIL, y + length, color, bClip) end
-- 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
polyrect(img, x, y, {{0, 0}, {width, 0}, {width, height}, {0, height}}, color, bClip)
end
-- filled rect, fillcolor is color if left empty _draw.rect_filled = function(img, x, y, width, height, color, fillcolor, bClip) if width == 0 or height == 0 then return end
if not fillcolor then _clear(img, color, x, y, x + width, y + height, bClip) else _clear(img, fillcolor, x, y, x + width, y + height, bClip) rect(img, x, y, width, height, color, bClip) end end
-- circle cx,cy define center point _draw.circle = function(img, cx, cy, radius, color, bClip) local r = radius _ellipse(img, cx - r, cy - r, cx + r, cy + r, color, _NIL, bClip) end
-- filled circle cx,cy define center, fillcolor is color if left empty _draw.circle_filled = function(img, cx, cy, radius, color, fillcolor, bClip) fillcolor = fillcolor or color local r = radius _ellipse(img, cx - r, cy - r, cx + r, cy + r, color, fillcolor, bClip) end
-- ellipse that fits into defined rect _draw.ellipse_rect = function(img, x1, y1, x2, y2, color, bClip) _ellipse(img, x1, y1, x2, y2, color, _NIL, bClip) end
--ellipse that fits into defined rect, fillcolor is color if left empty _draw.ellipse_rect_filled = function(img, x1, y1, x2, y2, color, fillcolor, bClip) if not fillcolor then fillcolor = color end
_ellipse(img, x1, y1, x2, y2, color, fillcolor, bClip) end
-- ellipse cx, cy define center point; a, b the major/minor axis _draw.ellipse = function(img, cx, cy, a, b, color, bClip) _ellipse(img, cx - a, cy - b, cx + a, cy + b, color, _NIL, bClip) end
-- filled ellipse cx, cy define center point; a, b the major/minor axis -- fillcolor is color if left empty _draw.ellipse_filled = function(img, cx, cy, a, b, color, fillcolor, bClip) if not fillcolor then fillcolor = color end
_ellipse(img, cx - a, cy - b, cx + a, cy + b, color, fillcolor, bClip) end
-- rounded rectangle local function rounded_rect(img, x, y, w, h, radius, color, bClip) local c_img if w == 0 or h == 0 then return end
-- limit the radius of the circle otherwise it will overtake the rect radius = _min(w / 2, radius) radius = _min(h / 2, radius)
local r = radius
c_img = _newimg(r * 2 + 1, r * 2 + 1) _clear(c_img, 0) _ellipse(c_img, 1, 1, 1 + r + r, 1 + r + r, 0x1, _NIL, bClip)
-- copy 4 pieces of circle to their respective corners _copy(img, c_img, x, y, _NIL, _NIL, r + 1, r + 1, bClip, BSAND, color) --TL _copy(img, c_img, x + w - r - 2, y, r, _NIL, r + 1, r + 1, bClip, BSAND, color) --TR _copy(img, c_img, x , y + h - r - 2, _NIL, r, r + 1, _NIL, bClip, BSAND, color) --BL _copy(img, c_img, x + w - r - 2, y + h - r - 2, r, r, r + 1, r + 1, bClip, BSAND, color)--BR c_img = _NIL
vline(img, x, y + r, h - r * 2, color, bClip); vline(img, x + w - 1, y + r, h - r * 2, color, bClip); hline(img, x + r, y, w - r * 2, color, bClip); hline(img, x + r, y + h - 1, w - r * 2, color, bClip); end
-- rounded rectangle fillcolor is color if left empty _draw.rounded_rect_filled = function(img, x, y, w, h, radius, color, fillcolor, bClip) local c_img
if w == 0 or h == 0 then return end
if not fillcolor then fillcolor = color end
-- limit the radius of the circle otherwise it will overtake the rect radius = _min(w / 2, radius) radius = _min(h / 2, radius)
local r = radius
c_img = _newimg(r * 2 + 1, r * 2 + 1) _clear(c_img, 0) _ellipse(c_img, 1, 1, 1 + r + r, 1 + r + r, 0x1, 0x1, bClip)
-- copy 4 pieces of circle to their respective corners _copy(img, c_img, x, y, _NIL, _NIL, r + 1, r + 1, bClip, BSAND, fillcolor) --TL _copy(img, c_img, x + w - r - 2, y, r, _NIL, r + 1, r + 1, bClip, BSAND, fillcolor) --TR _copy(img, c_img, x, y + h - r - 2, _NIL, r, r + 1, _NIL, bClip, BSAND, fillcolor) --BL _copy(img, c_img, x + w - r - 2, y + h - r - 2, r, r, r + 1, r + 1, bClip, BSAND, fillcolor) --BR c_img = _NIL
-- finish filling areas circles didn't cover _clear(img, fillcolor, x + r, y, x + w - r, y + h - 1, bClip) _clear(img, fillcolor, x, y + r, x + r, y + h - r, bClip) _clear(img, fillcolor, x + w - r, y + r, x + w - 1, y + h - r - 1, bClip)
if fillcolor ~= color then rounded_rect(img, x, y, w, h, r, color, bClip) end end
-- draws an image at xy coord in dest image _draw.image = function(dst, src, x, y, bClip) if not src then --make sure an image was passed, otherwise bail rb.splash(rb.HZ, "No Image!") return _NIL end
_copy(dst, src, x, y, 1, 1, _NIL, _NIL, bClip) end
-- expose internal functions to the outside through _draw table _draw.hline = hline _draw.vline = vline _draw.rect = rect _draw.rounded_rect = rounded_rectend -- _draw functions
return _draw