47 lines
2.5 KiB
GLSL
47 lines
2.5 KiB
GLSL
// pathfinder/shaders/tile_vertex.inc.glsl
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//
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// Copyright © 2020 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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vec4 fetchUnscaled(sampler2D srcTexture, vec2 scale, vec2 originCoord, int entry) {
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return texture(srcTexture, (originCoord + vec2(0.5) + vec2(entry, 0)) * scale);
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}
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void computeTileVaryings(vec2 position,
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int colorEntry,
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sampler2D textureMetadata,
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ivec2 textureMetadataSize,
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out vec2 outColorTexCoord0,
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out vec4 outBaseColor,
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out vec4 outFilterParams0,
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out vec4 outFilterParams1,
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out vec4 outFilterParams2,
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out vec4 outFilterParams3,
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out vec4 outFilterParams4,
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out int outCtrl) {
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vec2 metadataScale = vec2(1.0) / vec2(textureMetadataSize);
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vec2 metadataEntryCoord = vec2(colorEntry % 128 * 10, colorEntry / 128);
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vec4 colorTexMatrix0 = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 0);
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vec4 colorTexOffsets = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 1);
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vec4 baseColor = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 2);
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vec4 filterParams0 = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 3);
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vec4 filterParams1 = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 4);
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vec4 filterParams2 = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 5);
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vec4 filterParams3 = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 6);
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vec4 filterParams4 = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 7);
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vec4 extra = fetchUnscaled(textureMetadata, metadataScale, metadataEntryCoord, 8);
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outColorTexCoord0 = mat2(colorTexMatrix0) * position + colorTexOffsets.xy;
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outBaseColor = baseColor;
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outFilterParams0 = filterParams0;
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outFilterParams1 = filterParams1;
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outFilterParams2 = filterParams2;
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outFilterParams3 = filterParams3;
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outFilterParams4 = filterParams4;
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outCtrl = int(extra.x);
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}
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