25 lines
692 B
Scala
25 lines
692 B
Scala
$input v_texcoord0
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/*
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* Copyright 2011-2020 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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/*
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* Reference(s):
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* - Based on Virtual Texture Demo by Brad Blanchard
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* http://web.archive.org/web/20190103162638/http://linedef.com/virtual-texture-demo.html
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*/
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#include "../common/common.sh"
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#include "virtualtexture.sh"
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void main()
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{
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float mipCount = log2(PageTableSize);
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float mip = floor(MipLevel(v_texcoord0.xy, VirtualTextureSize) - MipBias);
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mip = clamp(mip, 0, mipCount);
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vec2 offset = floor(v_texcoord0.xy * PageTableSize);
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gl_FragColor = vec4(floor(vec3(offset / exp2(mip), mip)) / 255.0, 1.0);
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}
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