120 lines
3.9 KiB
Lua
120 lines
3.9 KiB
Lua
--[[
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MIT License
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Copyright (c) 2019 Semyon Entsov <swalrus@yandex.ru>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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]]--
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local center = {}
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function center:setupScreen(width, height)
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self._WIDTH = width
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self._HEIGHT = height
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self._MAX_WIDTH = 0
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self._MAX_HEIGHT = 0
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self._MAX_RELATIVE_WIDTH = 0
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self._MAX_RELATIVE_HEIGHT = 0
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self._SCREEN_WIDTH = love.graphics.getWidth()
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self._SCREEN_HEIGHT = love.graphics.getHeight()
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self._BORDERS = {
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['t'] = 0,
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['r'] = 0,
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['b'] = 0,
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['l'] = 0
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}
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self:apply()
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return self
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end
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function center:setBorders(top, right, bottom, left)
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self._BORDERS.t = top
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self._BORDERS.r = right
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self._BORDERS.b = bottom
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self._BORDERS.l = left
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end
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function center:setMaxWidth(width)
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self._MAX_WIDTH = width
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end
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function center:setMaxHeight(height)
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self._MAX_HEIGHT = height
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end
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function center:setMaxRelativeWidth(width)
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self._MAX_RELATIVE_WIDTH = width
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end
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function center:setMaxRelativeHeight(height)
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self._MAX_RELATIVE_HEIGHT = height
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end
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function center:resize(width, height)
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self._SCREEN_WIDTH = width
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self._SCREEN_HEIGHT = height
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self:apply()
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end
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function center:apply()
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local available_width = self._SCREEN_WIDTH - self._BORDERS.l - self._BORDERS.r
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local available_height = self._SCREEN_HEIGHT - self._BORDERS.t - self._BORDERS.b
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local max_width = available_width
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local max_height = available_height
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if self._MAX_RELATIVE_WIDTH > 0 and available_width * self._MAX_RELATIVE_WIDTH < max_width then
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max_width = available_width * self._MAX_RELATIVE_WIDTH
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end
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if self._MAX_RELATIVE_HEIGHT > 0 and available_height * self._MAX_RELATIVE_HEIGHT < max_height then
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max_height = available_height * self._MAX_RELATIVE_HEIGHT
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end
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if self._MAX_WIDTH > 0 and self._MAX_WIDTH < max_width then
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max_width = self._MAX_WIDTH
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end
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if self._MAX_HEIGHT > 0 and self._MAX_HEIGHT < max_height then
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max_height = self._MAX_HEIGHT
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end
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if max_height / max_width > self._HEIGHT / self._WIDTH then
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self._CANVAS_WIDTH = max_width
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self._CANVAS_HEIGHT = self._CANVAS_WIDTH * (self._HEIGHT / self._WIDTH)
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else
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self._CANVAS_HEIGHT = max_height
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self._CANVAS_WIDTH = self._CANVAS_HEIGHT * (self._WIDTH / self._HEIGHT)
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end
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self._SCALE = self._CANVAS_HEIGHT / self._HEIGHT
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self._OFFSET_X = self._BORDERS.l + (available_width - self._CANVAS_WIDTH) / 2
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self._OFFSET_Y = self._BORDERS.t + (available_height - self._CANVAS_HEIGHT) / 2
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end
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function center:start()
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love.graphics.push()
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love.graphics.translate(self._OFFSET_X, self._OFFSET_Y)
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love.graphics.scale(self._SCALE, self._SCALE)
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end
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function center:finish()
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love.graphics.pop()
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end
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function center:toGame(x, y)
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return (x - self._OFFSET_X) / self._SCALE,
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(y - self._OFFSET_Y) / self._SCALE
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end
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return center
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