68 lines
1.5 KiB
Lua
68 lines
1.5 KiB
Lua
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-- A canvas object for offscreen rendering.
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Canvas = Object:extend()
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function Canvas:init(w, h, opts)
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local opts = opts or {}
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self.w, self.h = w, h
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self.canvas = love.graphics.newCanvas(self.w, self.h, {msaa = opts.msaa})
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self.stencil = opts.stencil
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end
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-- Draws the canvas to the screen.
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--[[
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function init()
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canvas = Canvas(gw, gh)
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end
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function draw()
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canvas:draw_to(function()
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-- draw your game
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end)
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canvas:draw(0, 0, 0, sx, sy)
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end
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]]--
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function Canvas:draw(x, y, r, sx, sy, ox, oy)
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love.graphics.setColor(1, 1, 1, 1)
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love.graphics.setBlendMode("alpha", "premultiplied")
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love.graphics.draw(self.canvas, x or 0, y or 0, r or 0, sx or 1, sy or 1, ox or 0, oy or 0)
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love.graphics.setBlendMode("alpha")
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end
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function Canvas:draw2(x, y, r, sx, sy, ox, oy)
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love.graphics.setColor(1, 1, 1, 1)
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love.graphics.draw(self.canvas, x or 0, y or 0, r or 0, sx or 1, sy or 1, ox or 0, oy or 0)
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end
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-- Takes in a function and uses it to draw to this canvas.
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-- canvas:draw_to(function()
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-- graphics.rectangle(gw/2, gh/2, 50, 50)
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-- end)
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function Canvas:draw_to(action)
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love.graphics.setCanvas({self.canvas, stencil = self.stencil})
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love.graphics.clear()
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action()
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love.graphics.setCanvas()
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end
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-- Sets this canvas as the active one.
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function Canvas:set()
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current_canvas = self
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love.graphics.setCanvas(self.canvas)
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end
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-- Unsets this canvas as the active one.
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function Canvas:unset()
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current_canvas = nil
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love.graphics.setCanvas()
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end
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-- Clears this canvas' buffer.
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function Canvas:clear()
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love.graphics.clear()
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end
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