epervier-old/birb/utils/graphics.lua

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-- loveutils.graphics : a set of useful functions for love2D. Aim to reduce
-- boilerplate in love2D by creating usefull function to handle these roles.
--[[
Copyright © 2019 Kazhnuz
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]
local Graphics = {}
-- COLOR FUNCTIONS
-- Handle colors and scene colors
function Graphics.resetColor()
love.graphics.setColor(1,1,1,1)
end
-- PRINT TEXT
-- Functions to draw text on screen
function Graphics.print(text, x, y, align, r, sx, sy, ox, oy, kx, ky)
local width
local font = love.graphics.getFont()
width = font:getWidth(text)
if align == "center" then
width = (width/2)
elseif align == "right" then
width = width
else
width = 0
end
love.graphics.print(text, x - (width), y, r, sx, sy, ox, oy, kx, ky)
end
function Graphics.printWithSpacing(text, spacing, align, x, y, r, sx, sy, ox, oy, kx, ky)
-- DO NOT USE THIS FUNCTION IN A "UPDATE" FUNCTION !
-- it's pretty heavy to use as it use a loop to get every character in a text
local font = love.graphics.getFont()
local xx = 0
local lenght = string.len(text)
local basewidth = font:getWidth(text)
local width = basewidth + (spacing * lenght)
if align == "center" then
width = (width/2)
elseif align == "right" then
width = width
else
width = 0
end
for i=1, lenght do
local char = string.sub(text, i, i)
local pos = math.floor(x + xx - width)
love.graphics.print(char, pos, y)
xx = xx + font:getWidth(char) + spacing
end
end
-- FILTER FUNCTIONS
-- Basic filters to a drawable
function Graphics.drawShadow(drawable, x, y, r, sx, sy, ox, oy, kx, ky)
local color = love.graphics.getColor()
love.graphics.setColor(0, 0, 0, 0)
love.graphics.draw(drawable, x+1, y+1, r, sx, sy, ox, oy, kx, ky)
love.graphics.setColor(color)
love.graphics.draw(drawable, x, y, r, sx, sy, ox, oy, kx, ky)
end
function Graphics.drawBorder(drawable, border, x, y, r, sx, sy, ox, oy, kx, ky)
local color = love.graphics.getColor()
local b = border or 1
love.graphics.setColor(0, 0, 0, 0)
love.graphics.draw(drawable, x-b, y-b, r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x , y-b, r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x+b, y-b, r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x+b, y , r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x-b, y , r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x-b, y+b, r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x , y+b, r, sx, sy, ox, oy, kx, ky)
love.graphics.draw(drawable, x+b, y+b, r, sx, sy, ox, oy, kx, ky)
love.graphics.setColor(color)
love.graphics.draw(drawable, x, y, r, sx, sy, ox, oy, kx, ky)
end
-- PLACEHOLDER GRAPHICS FUNCTIONS
-- Ready-to-use placeolder and stuff
function Graphics.box(x, y, w, h)
local x = math.floor(x)
local y = math.floor(y)
local w = math.floor(w)
local h = math.floor(h)
local r, g, b, a = love.graphics.getColor( )
a = a or 1
love.graphics.setColor(r, g, b, 0.3 * a)
love.graphics.rectangle("fill", x, y, w, h)
love.graphics.setColor(r, g, b, a)
love.graphics.rectangle("line", x, y, w, h)
end
return Graphics