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annotate shaders/crt.v.glsl @ 2661:462e43f54abf

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Properly emulate extra TH transitions due to direction changes for 6-button controllers. Breaks Golden Axe II input the same as hardware with a 6-button controller
author Michael Pavone <pavone@retrodev.com>
date Wed, 05 Mar 2025 22:20:20 -0800
parents f3cca4b3f17a
children
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1392
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
parents:
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1
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
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2 attribute vec2 pos;
1977
f3cca4b3f17a Allow use of NPOT textures as a config option. Useful for some mobile GPUs
Michael Pavone <pavone@retrodev.com>
parents: 1392
diff changeset
3 varying mediump vec2 texcoord;
f3cca4b3f17a Allow use of NPOT textures as a config option. Useful for some mobile GPUs
Michael Pavone <pavone@retrodev.com>
parents: 1392
diff changeset
4 varying mediump vec2 screencoord;
f3cca4b3f17a Allow use of NPOT textures as a config option. Useful for some mobile GPUs
Michael Pavone <pavone@retrodev.com>
parents: 1392
diff changeset
5 uniform mediump float width, height;
f3cca4b3f17a Allow use of NPOT textures as a config option. Useful for some mobile GPUs
Michael Pavone <pavone@retrodev.com>
parents: 1392
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6 uniform mediump vec2 texsize;
1392
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
7
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
parents:
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8 void main()
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
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9 {
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
parents:
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10 gl_Position = vec4(pos, 0.0, 1.0);
1977
f3cca4b3f17a Allow use of NPOT textures as a config option. Useful for some mobile GPUs
Michael Pavone <pavone@retrodev.com>
parents: 1392
diff changeset
11 texcoord = sign(pos) * vec2(0.5*width/texsize.x, -0.5*height/texsize.y) + vec2(0.5*width/texsize.x, 0.5*height/texsize.y);
1392
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
12 screencoord = sign(pos);
4942da159194 Added a "subtle" CRT shader contributed by Anael Seghezzi
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
13 }