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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| // | ||
| // EffectMergerLumaLevelsPIX.metal | ||
| // PixelKit Shaders | ||
| // | ||
| // Created by Hexagons on 2017-11-26. | ||
| // Copyright © 2017 Hexagons. All rights reserved. | ||
| // | ||
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| #include <metal_stdlib> | ||
| using namespace metal; | ||
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| #import "random_header.metal" | ||
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| struct VertexOut{ | ||
| float4 position [[position]]; | ||
| float2 texCoord; | ||
| }; | ||
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| struct Uniforms { | ||
| float brightness; | ||
| float darkness; | ||
| float contrast; | ||
| float gamma; | ||
| float opacity; | ||
| }; | ||
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| fragment float4 effectMergerLumaLevelsPIX(VertexOut out [[stage_in]], | ||
| texture2d<float> inTexA [[ texture(0) ]], | ||
| texture2d<float> inTexB [[ texture(1) ]], | ||
| const device Uniforms& in [[ buffer(0) ]], | ||
| sampler s [[ sampler(0) ]]) { | ||
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| float pi = 3.14159265359; | ||
| int max_res = 16384 - 1; | ||
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| float u = out.texCoord[0]; | ||
| float v = out.texCoord[1]; | ||
| float2 uv = float2(u, v); | ||
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| float4 c = inTexA.sample(s, uv); | ||
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| float4 cb = inTexB.sample(s, uv); | ||
| float lum = (cb.r + cb.g + cb.b) / 3; | ||
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| float opacity = (1.0 - (1.0 - in.opacity) * lum); | ||
| float a = c.a * opacity; | ||
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| c *= 1 / (1.0 - in.darkness * lum); | ||
| c -= 1.0 / (1.0 - in.darkness * lum) - 1; | ||
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| c *= 1.0 - (1.0 - in.brightness) * lum; | ||
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| c -= 0.5; | ||
| c *= 1.0 + in.contrast * lum; | ||
| c += 0.5; | ||
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| c = pow(c, 1 / max(0.001, 1.0 - (1.0 - in.gamma) * lum)); | ||
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| c *= opacity; | ||
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| return float4(c.r, c.g, c.b, a); | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // | ||
| // LumaLevelsPIX.swift | ||
| // PixelKit | ||
| // | ||
| // Created by Hexagons on 2018-08-09. | ||
| // Open Source - MIT License | ||
| // | ||
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| import CoreGraphics | ||
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| public class LumaLevelsPIX: PIXMergerEffect, PIXAuto { | ||
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| override open var shader: String { return "effectMergerLumaLevelsPIX" } | ||
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| // MARK: - Public Properties | ||
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| public var brightness: LiveFloat = 1.0 | ||
| public var darkness: LiveFloat = 0.0 | ||
| public var contrast: LiveFloat = 0.0 | ||
| public var gamma: LiveFloat = 1.0 | ||
| public var opacity: LiveFloat = 1.0 | ||
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| // MARK: - Property Helpers | ||
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| override public var liveValues: [LiveValue] { | ||
| return [brightness, darkness, contrast, gamma, opacity] | ||
| } | ||
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| } | ||
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| public extension PIXOut { | ||
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| func _lumaLevels(with pix: PIX & PIXOut, brightness: LiveFloat = 1.0, darkness: LiveFloat = 0.0, contrast: LiveFloat = 0.0, gamma: LiveFloat = 1.0, opacity: LiveFloat = 1.0) -> LumaLevelsPIX { | ||
| let lumaLevelsPix = LumaLevelsPIX() | ||
| lumaLevelsPix.name = ":lumaLevels:" | ||
| lumaLevelsPix.inPixA = self as? PIX & PIXOut | ||
| lumaLevelsPix.inPixB = pix | ||
| lumaLevelsPix.brightness = brightness | ||
| lumaLevelsPix.darkness = darkness | ||
| lumaLevelsPix.contrast = contrast | ||
| lumaLevelsPix.gamma = gamma | ||
| lumaLevelsPix.opacity = opacity | ||
| return lumaLevelsPix | ||
| } | ||
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| func _vignetting(radius: LiveFloat = 0.5, inset: LiveFloat = 0.25, gamma: LiveFloat = 0.5) -> LumaLevelsPIX { | ||
| let pix = self as! PIX & PIXOut | ||
| let rectangle = RectanglePIX(res: pix.resolution ?? ._1024) | ||
| rectangle.bgColor = .white | ||
| rectangle.color = .black | ||
| rectangle.name = "vignetting:rectangle" | ||
| rectangle.size = LiveSize(w: (pix.resolution?.aspect ?? 1.0) - inset, h: 1.0 - inset) | ||
| let lumaLevelsPix = LumaLevelsPIX() | ||
| lumaLevelsPix.name = "vignetting:lumaLevels" | ||
| lumaLevelsPix.inPixA = pix | ||
| lumaLevelsPix.inPixB = rectangle._blur(radius) | ||
| lumaLevelsPix.gamma = gamma | ||
| return lumaLevelsPix | ||
| } | ||
|
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| } |
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