ftpiiu_plugin/source/switch/imgui_fsh.glsl

// ftpd is a server implementation based on the following:
// - RFC  959 (https://tools.ietf.org/html/rfc959)
// - RFC 3659 (https://tools.ietf.org/html/rfc3659)
// - suggested implementation details from https://cr.yp.to/ftp/filesystem.html
// 
// The MIT License (MIT)
//
// Copyright (C) 2020 Michael Theall
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#version 460

layout (location = 0) in vec2 vtxUv;
layout (location = 1) in vec4 vtxColor;

layout (binding = 0) uniform sampler2D tex;

layout (std140, binding = 0) uniform FragUBO {
	uint font;
} ubo;

layout (location = 0) out vec4 outColor;

void main()
{
	// font texture is single-channel (alpha)
	if (ubo.font != 0)
	    outColor = vtxColor * vec4 (vec3 (1.0), texture (tex, vtxUv).r);
	else
		outColor = vtxColor * texture (tex, vtxUv);
}