bgfx/examples/common/imgui/fs_imgui_texture.sc

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$input v_texcoord0, v_color0
/*
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* Copyright 2011-2018 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
#include <bgfx_shader.sh>
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SAMPLER2D(s_texColor, 0);
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void main()
{
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float alpha = texture2D(s_texColor, v_texcoord0).x;
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gl_FragColor = vec4(v_color0.xyz, v_color0.w * alpha);
}