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push and pop for graphics ?
Posted: Sun Feb 09, 2014 1:18 pm
by Ranguna259
Is there a function to save all graphic data such as the background color, the blend mode, the current canvas, the color, the color mask etc.. and then reset it ?
Something like love.graphics.push() and love.graphics.pop() but instead of saving the rotation, scale, shear and translate it'd save these:
Code: Select all
BackgroundColor
BlendMode
Canvas
Color
ColorMask
DefaultFilter
Font
LineJoin
LineStyle
LineWidth
PointSize
PointStyle
RenderTarget
Scissor
Shader
Stencil
I want this because I want to make a safe environment for graphics, basically I'd save all graphics options ( push() ) do a bunch of stuff after and then reset all options ( pop() ).
Re: push and pop for graphics ?
Posted: Sun Feb 09, 2014 2:30 pm
by bartbes
love.graphics.reset resets it to the initial values, if that helps.
Re: push and pop for graphics ?
Posted: Sun Feb 09, 2014 2:37 pm
by Ranguna259
It's not quite that what I want, that reset everything to the default values what I want is to reset to a previously saved state.
Exemple of reset
Code: Select all
love.graphics.getBackgroundColor() --0,0,0,255
love.graphics.setBackgroundColor(255,255,255,255)
love.graphics.getBackgroundColor() --255,255,255,255
love.graphics.reset()
love.graphics.getBackgroundColor() --0,0,0,255
What I want:
Code: Select all
love.graphics.getBackgroundColor() --0,0,0,255
love.graphics.setBackgroundColor(255,255,255,255)
love.graphics.getBackgroundColor() --255,255,255,255
push()
love.graphics.setBackgroundColor(255,0,0,255)
love.graphics.getBackgroundColor() --255,0,0,255
pop()
love.graphics.getBackgroundColor() --255,255,255,255
love.graphics.reset()
love.graphics.getBackgroundColor() --0,0,0,255
Re: push and pop for graphics ?
Posted: Sun Feb 09, 2014 3:14 pm
by Ranguna259
Ugly way:
Code: Select all
local function get(...)
arg={...}
storer[#storer+1]={}
local c=1
for i,v in ipairs(arg) do
storer[#storer][c] = v or 'nil'
c=c+1
end
end
local function set(i)
local returner = {}
local c=1
if #storer[1] > 0 then
for i,v in ipairs(storer[i]) do
returner[c]=v
c=c+1
end
else
returner[1] = nil
end
return returner[1],returner[2],returner[3],returner[4]
end
local storer ={}
function push()
get(love.graphics.getBackgroundColor())
get(love.graphics.getBlendMode())
get(love.graphics.getCanvas())
get(love.graphics.getColor())
get(love.graphics.getColorMask())
get(love.graphics.getDefaultFilter())
get(love.graphics.getFont())
get(love.graphics.getLineStyle())
get(love.graphics.getLineWidth())
get(love.graphics.getPointSize())
get(love.graphics.getPointStyle())
get(love.graphics.getScissor())
get(love.graphics.getShader())
end
function pop()
local c=1
love.graphics.setBackgroundColor(set(c))
c=c+1
love.graphics.setBlendMode(set(c))
c=c+1
love.graphics.setCanvas(set(c))
c=c+1
love.graphics.setColor(set(c))
c=c+1
love.graphics.setColorMask(set(c))
c=c+1
love.graphics.setDefaultFilter(set(c))
c=c+1
love.graphics.setFont(set(c))
c=c+1
love.graphics.setLineStyle(set(c))
c=c+1
love.graphics.setLineWidth(set(c))
c=c+1
love.graphics.setPointSize(set(c))
c=c+1
love.graphics.setPointStyle(set(c))
c=c+1
love.graphics.setScissor(set(c))
c=c+1
love.graphics.setShader(set(c))
c=c+1
end
Exemple use:
Code: Select all
function love.draw()
love.graphics.setBackgroundColor(255,255,255,255)
--BG is white
push()
love.graphics.reset()
--BG is black
pop()
--BG is white
end
Re: push and pop for graphics ?
Posted: Sun Feb 09, 2014 3:48 pm
by MarekkPie
There isn't, I'm afraid. And after messing around with the HTML5 Canvas API (which has context.save() and context.restore()), it's a really nice feature that would be great to have.
Re: push and pop for graphics ?
Posted: Sun Oct 05, 2014 2:25 am
by womple
Based on Ranguna259's answer, here's maybe a less ugly way
Code: Select all
local stack = {}
function pushGraphics()
--Store current config
local config = {}
config.backgroundColor = { love.graphics.getBackgroundColor() }
config.blendMode = { love.graphics.getBlendMode() }
config.canvas = { love.graphics.getCanvas() }
config.color = { love.graphics.getColor() }
config.colorMask = { love.graphics.getColorMask() }
config.defaultFilter = { love.graphics.getDefaultFilter() }
config.font = { love.graphics.getFont() }
config.lineStyle = { love.graphics.getLineStyle() }
config.lineWidth = { love.graphics.getLineWidth() }
config.pointSize = { love.graphics.getPointSize() }
config.pointStyle = { love.graphics.getPointStyle() }
config.scissor = { love.graphics.getScissor() }
config.shader = { love.graphics.getShader() }
--Push onto stack
table.insert(stack, config)
end
function popGraphics()
--Pop top of stack
local config = table.remove(stack)
--Restore configuration
love.graphics.setBackgroundColor(unpack(config.backgroundColor))
love.graphics.setBlendMode(unpack(config.blendMode))
love.graphics.setCanvas(unpack(config.canvas))
love.graphics.setColor(unpack(config.color))
love.graphics.setColorMask(unpack(config.colorMask))
love.graphics.setDefaultFilter(unpack(config.defaultFilter))
love.graphics.setFont(unpack(config.font))
love.graphics.setLineStyle(unpack(config.lineStyle))
love.graphics.setLineWidth(unpack(config.lineWidth))
love.graphics.setPointSize(unpack(config.pointSize))
love.graphics.setPointStyle(unpack(config.pointStyle))
love.graphics.setScissor(unpack(config.scissor))
love.graphics.setShader(unpack(config.shader))
end
Same usage as above (except I've renamed mine to pushGraphics() and popGraphics())
Re: push and pop for graphics ?
Posted: Tue Mar 12, 2024 5:41 pm
by darkfrei
Code: Select all
local function graphicsPushPopGenerator()
local states = {}
local graphicsPush = function()
local currentState = {
color = {love.graphics.getColor()}, -- must be table
lineWidth = love.graphics.getLineWidth(),
pointSize = love.graphics.getPointSize()
}
table.insert(states, currentState)
end
local graphicsPop = function()
if #states > 0 then
local currentState = table.remove(states)
love.graphics.setColor(currentState.color)
love.graphics.setLineWidth(currentState.lineWidth)
love.graphics.setPointSize(currentState.pointSize)
else
error("Cannot pop initial graphics state")
end
end
return graphicsPush, graphicsPop
end
Usage:
Code: Select all
local graphicsPush, graphicsPop = graphicsPushPopGenerator()
function love.draw ()
love.graphics.setColor (1,1,1)
love.graphics.rectangle ('fill', 50,50,50,50)
graphicsPush ()
love.graphics.setColor (0,0,1)
love.graphics.rectangle ('fill', 150,50,50,50)
graphicsPop ()
love.graphics.rectangle ('fill', 250,50,50,50)
end
- 2024-03-12T18_40_50-Untitled.png (5.52 KiB) Viewed 3912 times
Re: push and pop for graphics ?
Posted: Tue Mar 12, 2024 10:14 pm
by slime
You've bumped a 10 year old thread.
love.graphics.push("all") was added to love 9 years ago and does what the OP asks, you should use it instead of that code.
Re: push and pop for graphics ?
Posted: Wed Mar 13, 2024 8:09 am
by darkfrei
slime wrote: ↑Tue Mar 12, 2024 10:14 pm
You've bumped a 10 year old thread.
love.graphics.push("all") was added to love 9 years ago and does what the OP asks, you should use it instead of that code.
Almost 10 years. But we read the wiki graphics.pop yesterday and there was a problem: no information about the color stacking, but now I understand why.
Thanks for update 9 year ago!