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徐水峰
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xu.shuifeng
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Jun 15, 2018
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| // | ||
| // MTImageOverlayFilter.metal | ||
| // MetalFilters | ||
| // | ||
| // Created by xu.shuifeng on 2018/6/15. | ||
| // Copyright © 2018 shuifeng.me. All rights reserved. | ||
| // | ||
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| #include <metal_stdlib> | ||
| #include "MTIShaderLib.h" | ||
| using namespace metalpetal; | ||
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| fragment float4 MTImageOverlayFilterFragment(VertexOut vertexIn [[ stage_in ]], | ||
| texture2d<float, access::sample> inputTexture [[ texture(0) ]], | ||
| texture2d<float, access::sample> overlay [[ texture(1) ]], | ||
| sampler textureSampler [[ sampler(0) ]]) | ||
| { | ||
| constexpr sampler s(coord::normalized, address::clamp_to_edge, filter::linear); | ||
| float4 texel = inputTexture.sample(s, vertexIn.textureCoordinate); | ||
| float4 overlayTexel = overlay.sample(s, vertexIn.textureCoordinate); | ||
| texel.rgb = texel.rgb * (1.0 - overlayTexel.a) + overlayTexel.rgb; | ||
| return texel; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,17 @@ | ||
| // | ||
| // MTImageOverlayFilter.swift | ||
| // MetalFilters | ||
| // | ||
| // Created by xu.shuifeng on 2018/6/15. | ||
| // Copyright © 2018 shuifeng.me. All rights reserved. | ||
| // | ||
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| import Foundation | ||
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| class MTImageOverlayFilter: MTFilter { | ||
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| override var fragmentName: String { | ||
| return "MTImageOverlayFilterFragment" | ||
| } | ||
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| } |