import { project, fp64LowPart } from '@deck.gl/core';
import { glsl } from "../utils/syntax-tags.js";
/*
 * fill pattern shader module
 */
const patternVs = `
in vec4 fillPatternFrames;
in float fillPatternScales;
in vec2 fillPatternOffsets;
uniform bool fill_patternEnabled;
uniform vec2 fill_patternTextureSize;
out vec2 fill_uv;
out vec4 fill_patternBounds;
out vec4 fill_patternPlacement;
`;
const patternFs = `
uniform bool fill_patternEnabled;
uniform bool fill_patternMask;
uniform sampler2D fill_patternTexture;
uniform vec2 fill_uvCoordinateOrigin;
uniform vec2 fill_uvCoordinateOrigin64Low;
in vec4 fill_patternBounds;
in vec4 fill_patternPlacement;
in vec2 fill_uv;
const float FILL_UV_SCALE = 512.0 / 40000000.0;
`;
const inject = {
    'vs:DECKGL_FILTER_GL_POSITION': `
fill_uv = geometry.position.xy;
`,
    'vs:DECKGL_FILTER_COLOR': `
if (fill_patternEnabled) {
fill_patternBounds = fillPatternFrames / vec4(fill_patternTextureSize, fill_patternTextureSize);
fill_patternPlacement.xy = fillPatternOffsets;
fill_patternPlacement.zw = fillPatternScales * fillPatternFrames.zw;
}
`,
    'fs:DECKGL_FILTER_COLOR': `
if (fill_patternEnabled) {
vec2 scale = FILL_UV_SCALE * fill_patternPlacement.zw;
vec2 patternUV = mod(mod(fill_uvCoordinateOrigin, scale) + fill_uvCoordinateOrigin64Low + fill_uv, scale) / scale;
patternUV = mod(fill_patternPlacement.xy + patternUV, 1.0);
vec2 texCoords = fill_patternBounds.xy + fill_patternBounds.zw * patternUV;
vec4 patternColor = texture(fill_patternTexture, texCoords);
color.a *= patternColor.a;
if (!fill_patternMask) {
color.rgb = patternColor.rgb;
}
}
`
};
/* eslint-disable camelcase */
function getPatternUniforms(opts, uniforms) {
    if (!opts) {
        return {};
    }
    if ('fillPatternTexture' in opts) {
        const { fillPatternTexture } = opts;
        return {
            fill_patternTexture: fillPatternTexture,
            fill_patternTextureSize: [fillPatternTexture.width, fillPatternTexture.height]
        };
    }
    if ('viewport' in opts) {
        const { fillPatternMask = true, fillPatternEnabled = true } = opts;
        const { project_uCommonOrigin: coordinateOriginCommon } = uniforms;
        const coordinateOriginCommon64Low = [
            fp64LowPart(coordinateOriginCommon[0]),
            fp64LowPart(coordinateOriginCommon[1])
        ];
        return {
            fill_uvCoordinateOrigin: coordinateOriginCommon.slice(0, 2),
            fill_uvCoordinateOrigin64Low: coordinateOriginCommon64Low,
            fill_patternMask: fillPatternMask,
            fill_patternEnabled: fillPatternEnabled
        };
    }
    return {};
}
export const patternShaders = {
    name: 'fill-pattern',
    vs: patternVs,
    fs: patternFs,
    inject,
    dependencies: [project],
    // @ts-expect-error stricter luma gl types
    getUniforms: getPatternUniforms
};