Sprite:setStencilOperation

Available since: Gideros 2017.6

Class: Sprite

Description

Allows to set a stencil operation to be used when drawing this sprite.

   The table can contain the following fields:

• stencilClear: (boolean) whether the stencil should be cleared beforehand.
• stencilMask: (integer) the mask value used in stencil operations.
• stencilWriteMask: (integer) the mask value used when writing to stencil.
• stencilRef: (integer) the reference value used in stencil operations.
• stencilFunc: (integer) the stencil function to use.
• stencilFail: (integer) the stencil operation when stencil test failed.
• depthFail: (integer) the stencil operation when depth test failed.
• depthPass: (integer) the stencil operation when depth test has passed.

Stencil function and operations code are defined in Sprite.STENCIL_xxx fields and correspond to the GL_xxx relevant values in OpenGL stencil documentation.

Sprite:setStencilOperation(op)

Parameters

op: (table) A table containing the stencil operation settings, or nil to disable stencil

Examples

Example:

-- STENCILOPERATION @hgy29
local bg = Bitmap.new(Texture.new("gfx/vip/background.png"))
local ticket = Bitmap.new(Texture.new("gfx/vip/ticket.png"))
local text = Bitmap.new(Texture.new("gfx/vip/text.png"))
local fx1 = Bitmap.new(Texture.new("gfx/vip/fx1.png"))
local fx2 = Bitmap.new(Texture.new("gfx/vip/fx2.png"))
 
stage:addChild(bg) bg:setScale(0.5)
stage:addChild(ticket) ticket:setPosition(80,20) ticket:setScale(0.5)
ticket:addChild(fx1) fx1:setX(-100)
fx1:addChild(fx2) fx2:setX(-100)
ticket:addChild(text)
 
-- Use auto layout on ticket to center text automatically
ticket:setLayoutParameters{ rowWeights = {1}, columnWeights = {1} }
text:setLayoutConstraints{}

-- Use stencil for masking glow:
-- 1) Clear stencil and set it to '1' for every pixel drawn on 'ticket'
ticket:setStencilOperation{
	stencilClear = true, stenciMask = 1, stencilWriteMask = 1, stencilRef = 1,
	stencilFunc = Sprite.STENCIL_ALWAYS, depthPass = Sprite.STENCIL_REPLACE
}
--2) Only draw fx1/fx2 if stencil isn't 0
fx1:setStencilOperation{
	stencilClear = false, stencilMask = 1, stencilRef = 0,
	stencilFunc = Sprite.STENCIL_NOTEQUAL
}
 
local dir = 1
stage:addEventListener(Event.ENTER_FRAME, function()
	if fx1:getX() > 450 then
		dir = -1
	elseif fx1:getX() < -100 then
		dir = 1
	end
	fx1:setX(fx1:getX() + dir*5)
end)

---

• Sprite

• Sprite.new

• Sprite:addChild
• Sprite:addChildAt
• Sprite:clearBlendMode
• Sprite:clone
• Sprite:contains
• Sprite:get
• Sprite:getAlpha
• Sprite:getAnchorPoint
• Sprite:getAnchorPosition
• Sprite:getBounds
• Sprite:getChildAt
• Sprite:getChildIndex
• Sprite:getChildrenAtPoint
• Sprite:getClip
• Sprite:getColorTransform
• Sprite:getDrawCount
• Sprite:getHeight
• Sprite:getLayoutConstraints
• Sprite:getLayoutInfo
• Sprite:getLayoutParameters
• Sprite:getMatrix
• Sprite:getNumChildren
• Sprite:getParent
• Sprite:getPosition
• Sprite:getRotation
• Sprite:getRotationX
• Sprite:getRotationY
• Sprite:getScale
• Sprite:getScaleX
• Sprite:getScaleY
• Sprite:getScaleZ
• Sprite:getSize
• Sprite:getSkew
• Sprite:getSkewX
• Sprite:getSkewY
• Sprite:getWidth
• Sprite:getX
• Sprite:getY
• Sprite:getZ
• Sprite:globalToLocal
• Sprite:hitTestPoint
• Sprite:isVisible
• Sprite:localToGlobal
• Sprite:redrawEffects
• Sprite:removeChild
• Sprite:removeChildAt
• Sprite:removeFromParent
• Sprite:set
• Sprite:setAlpha
• Sprite:setAnchorPoint
• Sprite:setAnchorPosition
• Sprite:setBlendMode
• Sprite:setClip
• Sprite:setColorTransform
• Sprite:setEffectConstant
• Sprite:setEffectStack
• Sprite:setGhosts
• Sprite:setLayoutConstraints
• Sprite:setLayoutParameters
• Sprite:setMatrix
• Sprite:setPosition
• Sprite:setRotation
• Sprite:setRotationX
• Sprite:setRotationY
• Sprite:setScale
• Sprite:setScaleX
• Sprite:setScaleY
• Sprite:setScaleZ
• Sprite:setShader
• Sprite:setShaderConstant
• Sprite:setSkew
• Sprite:setSkewX
• Sprite:setSkewY
• Sprite:setStencilOperation
• Sprite:setStopEventPropagation
• Sprite:setVisible
• Sprite:setX
• Sprite:setY
• Sprite:setZ
• Sprite:spriteToLocal
• Sprite:swapChildren
• Sprite:swapChildrenAt

• Sprite.ADD
• Sprite.ALPHA
• Sprite.EFFECT MODE AUTOMATIC
• Sprite.EFFECT MODE CONTINUOUS
• Sprite.EFFECT MODE TRIGGERED
• Sprite.LAYOUT ANCHOR CENTER
• Sprite.LAYOUT ANCHOR EAST
• Sprite.LAYOUT ANCHOR NORTH
• Sprite.LAYOUT ANCHOR NORTHEAST
• Sprite.LAYOUT ANCHOR NORTHWEST
• Sprite.LAYOUT ANCHOR SOUTH
• Sprite.LAYOUT ANCHOR SOUTHEAST
• Sprite.LAYOUT ANCHOR SOUTHWEST
• Sprite.LAYOUT ANCHOR WEST
• Sprite.LAYOUT FILL BOTH
• Sprite.LAYOUT FILL HORIZONTAL
• Sprite.LAYOUT FILL NONE
• Sprite.LAYOUT FILL VERTICAL
• Sprite.MULTIPLY
• Sprite.NO ALPHA
• Sprite.SCREEN
• Sprite.new

• Event.ADDED_TO_STAGE
• Event.ENTER_FRAME
• Event.KEY_CHAR
• Event.KEY_DOWN
• Event.KEY_UP
• Event.LAYOUT_RESIZED
• Event.MOUSE_DOWN
• Event.MOUSE_ENTER
• Event.MOUSE_HOVER
• Event.MOUSE_LEAVE
• Event.MOUSE_MOVE
• Event.MOUSE_UP
• Event.MOUSE_WHEEL
• Event.REMOVED_FROM_STAGE
• Event.TOUCHES_BEGIN
• Event.TOUCHES_CANCEL
• Event.TOUCHES_END
• Event.TOUCHES_MOVE

---

---

• Main Page
• Lua API
• Main API
• Plugins