ColorBlindnessPostProcessor

PostProcessors apply a shader effect to the entire screen at the end of the frame.

Implement PostProcessor.process: the current (MSAA-resolved) screen arrives as source and the result must be rendered into destination — typically with a ShaderPass or ShaderPipeline. Because the shape matches ShaderPipelineLike, effect objects like BloomEffect or BlurEffect can be added as post processors directly:

game.graphicsContext.addPostProcessor(new ex.BloomEffect({ graphicsContext }));

Use ShaderPipelinePostProcessor to build one from a list of fragment sources.

Fragment shaders in a ShaderPass/ShaderPipeline get these built-ins:

• uniform sampler2D u_image - the current screen (or previous pass output)
• uniform vec2 u_resolution - the destination resolution (in pixels)
• uniform vec2 u_texelSize - 1.0 / source resolution
• uniform float u_time_ms - total time in milliseconds
• uniform float u_elapsed_ms - elapsed milliseconds since the last frame
• in vec2 v_uv - 0-1 UV over the screen

The deprecated single-pass path receives u_image at slot 0 plus u_time_ms, u_elapsed_ms, and u_resolution when declared; custom uniforms can be updated in PostProcessor.onUpdate.

Implements

• PostProcessor

Index

Constructors

• constructor

Accessors

• colorBlindnessMode
• simulate

Methods

• initialize
• process

Constructors

constructor

• ColorBlindnessPostProcessor(_colorBlindnessMode: ColorBlindnessMode, simulate?: boolean): ColorBlindnessPostProcessor

• Parameters

  • _colorBlindnessMode: ColorBlindnessMode

  • simulate: boolean = false

  Returns ColorBlindnessPostProcessor

Accessors

colorBlindnessMode

• get colorBlindnessMode(): ColorBlindnessMode
• set colorBlindnessMode(colorBlindMode: ColorBlindnessMode): void

• Returns ColorBlindnessMode

• Parameters

  • colorBlindMode: ColorBlindnessMode

  Returns void

simulate

• get simulate(): boolean
• set simulate(value: boolean): void

• Returns boolean

• Parameters

  • value: boolean

  Returns void

Methods

initialize

• initialize(graphicsContext: ExcaliburGraphicsContextWebGL): void

• Implementation of PostProcessor.initialize

  Called once when the post processor is added to the graphics context

  ---

  Parameters

  • graphicsContext: ExcaliburGraphicsContextWebGL

  Returns void

process

• process(source: Framebuffer, destination: Framebuffer): void

• Implementation of PostProcessor.process

  source is the current (MSAA-resolved) screen framebuffer, render the result into destination, for example with a ShaderPass or ShaderPipeline.

  ---

  Parameters

  • source: Framebuffer

  • destination: Framebuffer

  Returns void