Storing and returning a love.graphics state

[TechnoCat]

Is there something similar to love.graphics.push/pop to cover this?

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  local blendMode = love.graphics.getBlendMode()
  local r,g,b,a = love.graphics.getColor()
  local colorMode = love.graphics.getColorMode()
  local font = love.graphics.getFont()
  local lineStyle = love.graphics.getLineStyle()
  local lineWidth = love.graphics.getLineWidth()
  local lineStipple = love.graphics.getLineStipple()
  --DO STUFF
  love.graphics.setBlendMode(blendMode)
  love.graphics.setColor(r,g,b,a)
  love.graphics.setColorMode(colorMode)
  love.graphics.setFont(font)
  love.graphics.setLine(lineWidth, lineStyle)
  love.graphics.setLineStipple(lineStipple)

[vrld]

Not natively, but it can be added lua-side:

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local stack = {}
function love.graphics.pushState()
    -- get state
    local state = {}
    state.blendMode   = love.graphics.getBlendMode()
    state.color       = {love.graphics.getColor()}
    state.colorMode   = love.graphics.getColorMode()
    state.font        = love.graphics.getFont() or 12
    state.lineStyle   = love.graphics.getLineStyle()
    state.lineWidth   = love.graphics.getLineWidth()
    state.lineStipple = love.graphics.getLineStipple() and {love.graphics.getLineStipple()} or {1,255}

    -- push state
    stack[#stack+1] = state
end

function love.graphics.popState()
    -- restore state
    local state = stack[#stack]
    love.graphics.setBlendMode( state.blendMode )
    love.graphics.setColor( unpack(state.color) )
    love.graphics.setColorMode( state.colorMode )
    love.graphics.setFont( state.font )
    love.graphics.setLine( state.lineWidth, state.lineStyle )
    love.graphics.setLineStipple( unpack(state.lineStipple) )

    -- pop state
    stack[#stack] = nil
end

Put that either on top of main.lua or (better) into a separate file which you then require in main.lua

Edit: Account for possible nil-ness of love.graphics.getFont() and love.graphics.getLineStipple(). See TechnoCat's post

[zac352]

I should write a library just for this.
I should also finish that library I made for sharing _G throughout threads.

[TechnoCat]

Anyone curious about doing this.
adding this to love.load before pushing and popping the state

Code: Select all

if love.graphics.getFont()==nil then
  love.graphics.setFont(love.graphics.newFont(12))
end
if love.graphics.getLineStipple()==nil then
  love.graphics.setLineStipple(1111111111111111, 1)
end

is a good idea.

[vrld]

I wasn't aware of that love.graphics.getFont() and love.graphics.getLineStipple() could be nil (possible bug there?).
The pushState function now accounts for that by setting default values. This will be done only once, so don''t worry this will take up too much runtime.

[TechnoCat]

Code: Select all

love.graphics.getLineStipple() and {love.graphics.getLineStipple()} or {1,255}

This doesn't work.

I wrote this unsatisfying code:

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local lineStipple = love.graphics.getLineStipple()
love.graphics.setLineStipple(lineStipple or unpack({1,255}))

[vrld]

This doesn't work.

Strange, it worked for me with both 0.6.2 and 0.7. What version are you using?

Code: Select all

local lineStipple = love.graphics.getLineStipple()
love.graphics.setLineStipple(lineStipple or unpack({1,255}))

This does only set the pattern, but not the repeat parameter

[TechnoCat]

Strange, it worked for me with both 0.6.2 and 0.7. What version are you using?

0.7.0 Ubuntu from bartbe's unstable ppa.

EDIT: Scissor also has default as nil.
EDIT2: that line stipple code is wrong too.