@deck.gl/layers/dist/text-layer/text-background-layer/text-background-layer-fragment.glsl.js

deck.gl core layers

// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
export default `\
#version 300 es
#define SHADER_NAME text-background-layer-fragment-shader
precision highp float;
in vec4 vFillColor;
in vec4 vLineColor;
in float vLineWidth;
in vec2 uv;
in vec2 dimensions;
out vec4 fragColor;
float round_rect(vec2 p, vec2 size, vec4 radii) {
vec2 pixelPositionCB = (p - 0.5) * size;
vec2 sizeCB = size * 0.5;
float maxBorderRadius = min(size.x, size.y) * 0.5;
vec4 borderRadius = vec4(min(radii, maxBorderRadius));
borderRadius.xy =
(pixelPositionCB.x > 0.0) ? borderRadius.xy : borderRadius.zw;
borderRadius.x = (pixelPositionCB.y > 0.0) ? borderRadius.x : borderRadius.y;
vec2 q = abs(pixelPositionCB) - sizeCB + borderRadius.x;
return -(min(max(q.x, q.y), 0.0) + length(max(q, 0.0)) - borderRadius.x);
}
float rect(vec2 p, vec2 size) {
vec2 pixelPosition = p * size;
return min(min(pixelPosition.x, size.x - pixelPosition.x),
min(pixelPosition.y, size.y - pixelPosition.y));
}
vec4 get_stroked_fragColor(float dist) {
float isBorder = smoothedge(dist, vLineWidth);
return mix(vFillColor, vLineColor, isBorder);
}
void main(void) {
geometry.uv = uv;
if (textBackground.borderRadius != vec4(0.0)) {
float distToEdge = round_rect(uv, dimensions, textBackground.borderRadius);
if (textBackground.stroked) {
fragColor = get_stroked_fragColor(distToEdge);
} else {
fragColor = vFillColor;
}
float shapeAlpha = smoothedge(-distToEdge, 0.0);
fragColor.a *= shapeAlpha;
} else {
if (textBackground.stroked) {
float distToEdge = rect(uv, dimensions);
fragColor = get_stroked_fragColor(distToEdge);
} else {
fragColor = vFillColor;
}
}
DECKGL_FILTER_COLOR(fragColor, geometry);
}
`;
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