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comparison shaders/sharp.f.glsl @ 1856:be1da0a68d1e

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Added "sharp" shader
author Michael Pavone <pavone@retrodev.com>
date Sat, 27 Apr 2019 17:37:12 -0700
parents
children f3cca4b3f17a
comparison
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1855:92532eb6986d 1856:be1da0a68d1e
1
2 uniform sampler2D textures[2];
3
4 varying mediump vec2 texcoord;
5
6 void main()
7 {
8 mediump float x0 = (floor(texcoord.x * 512.0 - 0.25) + 0.5)/512.0;
9 mediump float x1 = (floor(texcoord.x * 512.0 + 0.25) + 0.5)/512.0;
10 mediump float y0 = (floor(texcoord.y * 512.0 + 0.25) + 0.5)/512.0;
11 mediump float y1 = (floor(texcoord.y * 512.0 - 0.25) + 0.5)/512.0;
12
13
14 mediump vec2 modifiedCoord0 = vec2(texcoord.x, (floor(texcoord.y * 512.0 + 0.25) + 0.5)/512.0);
15 mediump vec2 modifiedCoord1 = vec2(texcoord.x, (floor(texcoord.y * 512.0 - 0.25) + 0.5)/512.0);
16 mediump float ymix = (sin(texcoord.y * 1024.0 * 3.14159265359) + 1.0) * 0.5;
17 mediump float xmix = (sin(texcoord.x * 1024.0 * 3.14159265359) + 1.0) * 0.5;
18 gl_FragColor = mix(
19 mix(
20 texture2D(textures[1], vec2(x0, y1)),
21 texture2D(textures[0], vec2(x0, y0)),
22 ymix
23 ),
24 mix(
25 texture2D(textures[1], vec2(x1, y1)),
26 texture2D(textures[0], vec2(x1, y0)),
27 ymix
28 ),
29 xmix
30 );
31 }