examples/shader: remove the CRT effect

examples/shader/crt.go

@@ -1,59 +0,0 @@
-// Copyright 2022 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build ignore
-// +build ignore
-
-package main
-
-var Time float
-var Cursor vec2
-var ScreenSize vec2
-
-func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
-	const (
-		blurScaleX  = 0.45
-		lowLumScan  = 5.0
-		hiLumScan   = 10.0
-		BrightBoost = 1.25
-		maskDark    = 0.25
-		maskFade    = 0.8
-	)
-
-	pos := texCoord
-	origin, size := imageSrcRegionOnTexture()
-	pos -= origin
-	pos /= size
-
-	maskFade := 0.3333 * maskFade
-	invDims := 1.0 / imageSrcTextureSize().xy
-	p := pos * imageSrcTextureSize()
-	i := floor(p) + 0.50
-	f := p - i
-	p = (i + 4.0*f*f*f) * invDims
-	p.x = mix(p.x, pos.x, blurScaleX)
-	Y := f.y * f.y
-	YY := Y * Y
-	whichmask := fract(pos.x * -0.4999)
-	mask := 1.0
-	if whichmask < 0.5 {
-		mask -= maskDark
-	}
-
-	clr := imageSrc2At(p*size + origin).rgb
-	scanLineWeight := (BrightBoost - lowLumScan*(Y-2.05*YY))
-	scanLineWeightB := 1.0 - hiLumScan*(YY-2.8*YY*Y)
-
-	return vec4(clr.rgb*mix(scanLineWeight*mask, scanLineWeightB, dot(clr.rgb, vec3(maskFade))), 1.0)
-}

examples/shader/main.go

@@ -51,9 +51,6 @@ var (
 
 	//go:embed water.go
 	water_go []byte
-
-	//go:embed crt.go
-	crt_go []byte
 )
 
 const (
@@ -109,7 +106,6 @@ var shaderSrcs = [][]byte{
 	chromaticaberration_go,
 	dissolve_go,
 	water_go,
-	crt_go,
 }
 
 type Game struct {