export declare enum Location {
    BARYCENTRIC = 0,
    POSITION = 1,
    UV_OFFSET = 2
}
export declare const vert = "  \nlayout(std140) uniform SceneUniforms {\n  mat3 u_ProjectionMatrix;\n  mat3 u_ViewMatrix;\n  mat3 u_ViewProjectionInvMatrix;\n  vec4 u_BackgroundColor;\n  vec4 u_GridColor;\n  float u_ZoomScale;\n  float u_CheckboardStyle;\n};\n\nlayout(std140) uniform ShapeUniforms {\n  mat3 u_ModelMatrix;\n  vec4 u_FillColor;\n  vec4 u_StrokeColor;\n  vec4 u_ZIndexStrokeWidth;\n  vec4 u_Opacity;\n  vec4 u_DropShadowColor;\n  vec4 u_DropShadow;\n  vec2 u_AtlasSize;\n};\n\n\n#ifdef USE_WIREFRAME\n  layout(location = 0) in vec3 a_Barycentric;\n  out vec3 v_Barycentric;\n#endif\n\nlayout(location = 1) in vec3 a_Position;\nlayout(location = 2) in vec4 a_UvOffset;\n\nout vec2 v_Uv;\n\nvoid main() {\n  \n#ifdef USE_WIREFRAME\n  v_Barycentric = a_Barycentric;\n#endif\n\n\n  #ifdef USE_INSTANCES\n    float zIndex = a_Position.z;\n  #else\n    float zIndex = u_ZIndexStrokeWidth.x;\n  #endif\n\n  float strokeWidth = u_ZIndexStrokeWidth.y;\n  float fontSize = u_ZIndexStrokeWidth.z;\n  float sizeAttenuation = u_Opacity.w;\n\n  float scale = 1.0;\n  if (sizeAttenuation > 0.5) {\n    scale = 1.0 / u_ZoomScale;\n  }\n\n  v_Uv = a_UvOffset.xy / u_AtlasSize;\n  vec2 offset = a_UvOffset.zw;\n\n  gl_Position = vec4((u_ProjectionMatrix \n    * u_ViewMatrix\n    * u_ModelMatrix \n    * vec3(a_Position.xy + offset * scale, 1)).xy, zIndex, 1);\n}\n";
export declare const frag = "  \nlayout(std140) uniform SceneUniforms {\n  mat3 u_ProjectionMatrix;\n  mat3 u_ViewMatrix;\n  mat3 u_ViewProjectionInvMatrix;\n  vec4 u_BackgroundColor;\n  vec4 u_GridColor;\n  float u_ZoomScale;\n  float u_CheckboardStyle;\n};\n\nlayout(std140) uniform ShapeUniforms {\n  mat3 u_ModelMatrix;\n  vec4 u_FillColor;\n  vec4 u_StrokeColor;\n  vec4 u_ZIndexStrokeWidth;\n  vec4 u_Opacity;\n  vec4 u_DropShadowColor;\n  vec4 u_DropShadow;\n  vec2 u_AtlasSize;\n};\n\nout vec4 outputColor;\n\n\n#ifdef USE_WIREFRAME\n  in vec3 v_Barycentric;\n\n  float edgeFactor() {\n    float u_WireframeLineWidth = 1.0;\n    vec3 d = fwidth(v_Barycentric);\n    vec3 a3 = smoothstep(vec3(0.0), d * u_WireframeLineWidth, v_Barycentric);\n    return min(min(a3.x, a3.y), a3.z);\n  }\n#endif\n\nin vec2 v_Uv;\nuniform sampler2D u_Texture;\n\nfloat epsilon = 0.000001;\n\nfloat median(float r, float g, float b) {\n  return max(min(r, g), min(max(r, g), b));\n}\n\n#define SDF_PX 8.0\n\nvoid main() {\n  float strokeWidth = u_ZIndexStrokeWidth.y;\n  vec4 fillColor = u_FillColor;\n  vec4 strokeColor = u_StrokeColor;\n  float opacity = u_Opacity.x;\n  float fillOpacity = u_Opacity.y;\n  float strokeOpacity = u_Opacity.z;\n  float shapeSizeAttenuation = u_Opacity.w;\n  vec4 dropShadow = u_DropShadow;\n  vec4 dropShadowColor = u_DropShadowColor;\n  float shadowDist;\n  float shadowBlurRadius = u_DropShadow.z;\n  \n  #ifdef USE_SDF_NONE\n    outputColor = texture(SAMPLER_2D(u_Texture), v_Uv);\n  #else\n    float dist;\n    lowp float buff;\n    vec2 shadowOffset = u_DropShadow.xy / u_AtlasSize;\n\n    #ifdef USE_SDF\n      #ifdef USE_EMOJI\n        fillColor = texture(SAMPLER_2D(u_Texture), v_Uv);\n      #endif\n      dist = texture(SAMPLER_2D(u_Texture), v_Uv).a;\n      buff = (256.0 - 64.0) / 256.0;\n\n      #ifdef USE_SHADOW\n        shadowDist = texture(SAMPLER_2D(u_Texture), v_Uv - shadowOffset).a;\n      #endif\n    #endif\n\n    #ifdef USE_MSDF\n      vec3 s = texture(SAMPLER_2D(u_Texture), v_Uv).rgb;\n      dist = median(s.r, s.g, s.b);\n      buff = 0.5;\n\n      #ifdef USE_SHADOW\n        vec3 shadowSample = texture(SAMPLER_2D(u_Texture), v_Uv - shadowOffset).rgb;\n        shadowDist = median(shadowSample.r, shadowSample.g, shadowSample.b);\n      #endif\n    #endif\n\n    float fontSize = u_ZIndexStrokeWidth.z;\n    fillColor.a *= fillOpacity;\n    strokeColor.a *= strokeOpacity;\n\n    highp float gamma_scaled = fwidth(dist);\n    if (strokeWidth > 0.0 && strokeColor.a > 0.0) {\n      float fillAlpha = smoothstep(buff - gamma_scaled, buff + gamma_scaled, dist);      \n      float strokeThreshold = buff - strokeWidth / fontSize;\n      float strokeAlpha = smoothstep(strokeThreshold - gamma_scaled, strokeThreshold + gamma_scaled, dist);\n\n      vec4 finalColor = mix(strokeColor, fillColor, fillAlpha);\n      outputColor = finalColor;\n      opacity *= strokeAlpha;\n    } else {\n      highp float alpha = smoothstep(buff - gamma_scaled, buff + gamma_scaled, dist);\n      opacity *= alpha;\n      outputColor = fillColor;\n    }\n  #endif\n  \n  outputColor.a *= opacity;\n\n  #ifdef USE_SHADOW \n    // gamma_scaled = fwidth(shadowDist) * 128.0 / shadowBlurRadius;\n    gamma_scaled = shadowBlurRadius / 128.0;\n    highp float alpha = smoothstep(buff - gamma_scaled, buff + gamma_scaled, shadowDist);\n    dropShadowColor.a *= alpha;\n    outputColor = mix(dropShadowColor, outputColor, outputColor.a);\n  #endif\n\n  \n#ifdef USE_WIREFRAME\n  vec3 u_WireframeLineColor = vec3(0.0, 0.0, 0.0);\n\n  outputColor.xyz = mix(outputColor.xyz, u_WireframeLineColor, (1.0 - edgeFactor()));\n  if (any(lessThan(v_Barycentric, vec3(0.01)))) {\n    outputColor.a = 0.95;\n  }\n#endif\n\n\n  if (outputColor.a < epsilon)\n    discard;\n}\n";
export declare const physical_frag = "  \nlayout(std140) uniform SceneUniforms {\n  mat3 u_ProjectionMatrix;\n  mat3 u_ViewMatrix;\n  mat3 u_ViewProjectionInvMatrix;\n  vec4 u_BackgroundColor;\n  vec4 u_GridColor;\n  float u_ZoomScale;\n  float u_CheckboardStyle;\n};\n\nlayout(std140) uniform ShapeUniforms {\n  mat3 u_ModelMatrix;\n  vec4 u_FillColor;\n  vec4 u_StrokeColor;\n  vec4 u_ZIndexStrokeWidth;\n  vec4 u_Opacity;\n  vec4 u_DropShadowColor;\n  vec4 u_DropShadow;\n  vec2 u_AtlasSize;\n};\n\nout vec4 outputColor;\n\n\n#ifdef USE_WIREFRAME\n  in vec3 v_Barycentric;\n\n  float edgeFactor() {\n    float u_WireframeLineWidth = 1.0;\n    vec3 d = fwidth(v_Barycentric);\n    vec3 a3 = smoothstep(vec3(0.0), d * u_WireframeLineWidth, v_Barycentric);\n    return min(min(a3.x, a3.y), a3.z);\n  }\n#endif\n\nin vec2 v_Uv;\nuniform sampler2D u_Texture;\n\nfloat epsilon = 0.000001;\n\nfloat median(float r, float g, float b) {\n  return max(min(r, g), min(max(r, g), b));\n}\n\n\n  \n  \n  float aastep(float threshold, float value) {\n    float afwidth = length(vec2(dFdx(value), dFdy(value))) * 0.70710678118654757;\n    return smoothstep(threshold - afwidth, threshold + afwidth, value);\n  }\n\n  \n  vec3 mod289(vec3 x) {\n    return x - floor(x * (1.0 / 289.0)) * 289.0;\n  }\n  \n  vec2 mod289(vec2 x) {\n    return x - floor(x * (1.0 / 289.0)) * 289.0;\n  }\n  \n  vec3 permute(vec3 x) {\n    return mod289(((x*34.0)+1.0)*x);\n  }\n  \n  float snoise(vec2 v)\n    {\n    const vec4 C = vec4(0.211324865405187,  // (3.0-sqrt(3.0))/6.0\n                        0.366025403784439,  // 0.5*(sqrt(3.0)-1.0)\n                       -0.577350269189626,  // -1.0 + 2.0 * C.x\n                        0.024390243902439); // 1.0 / 41.0\n  // First corner\n    vec2 i  = floor(v + dot(v, C.yy) );\n    vec2 x0 = v -   i + dot(i, C.xx);\n  \n  // Other corners\n    vec2 i1;\n    //i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0\n    //i1.y = 1.0 - i1.x;\n    i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);\n    // x0 = x0 - 0.0 + 0.0 * C.xx ;\n    // x1 = x0 - i1 + 1.0 * C.xx ;\n    // x2 = x0 - 1.0 + 2.0 * C.xx ;\n    vec4 x12 = x0.xyxy + C.xxzz;\n    x12.xy -= i1;\n  \n  // Permutations\n    i = mod289(i); // Avoid truncation effects in permutation\n    vec3 p = permute( permute( i.y + vec3(0.0, i1.y, 1.0 ))\n      + i.x + vec3(0.0, i1.x, 1.0 ));\n  \n    vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);\n    m = m*m ;\n    m = m*m ;\n  \n  // Gradients: 41 points uniformly over a line, mapped onto a diamond.\n  // The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)\n  \n    vec3 x = 2.0 * fract(p * C.www) - 1.0;\n    vec3 h = abs(x) - 0.5;\n    vec3 ox = floor(x + 0.5);\n    vec3 a0 = x - ox;\n  \n  // Normalise gradients implicitly by scaling m\n  // Approximation of: m *= inversesqrt( a0*a0 + h*h );\n    m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );\n  \n  // Compute final noise value at P\n    vec3 g;\n    g.x  = a0.x  * x0.x  + h.x  * x0.y;\n    g.yz = a0.yz * x12.xz + h.yz * x12.yw;\n    return 130.0 * dot(m, g);\n  }\n  float absorb(float sdf, vec2 uv, float scale, float falloff) {\n    float distort = sdf + snoise(uv * scale) * falloff;\n    return aastep(0.5, distort);\n  }\n\n\n  // float ink(float sdf, vec2 uv) {\n  //   float alpha = 0.0;\n  //   alpha += absorb(sdf, uv, 1000.0, 0.1) * 0.3;\n  //   alpha += absorb(sdf, uv, 50.0, 0.2) * 0.3;\n  //   alpha += absorb(sdf, uv, 500.0, 0.2) * 0.3;\n  //   return alpha;\n  // }\n\n  // float ink(float sdf, vec2 uv) {\n  //   float alpha = 0.0;\n  //   alpha += absorb(sdf, uv, 80.0, 0.02) * 0.1;\n  //   alpha += absorb(sdf, uv, 50.0, 0.02) * 0.1;\n  //   alpha += absorb(sdf, uv, 500.0, 0.05) * 0.2;\n  //   alpha += absorb(sdf, uv, 1000.0, 0.05) * 0.2;\n  //   alpha += absorb(sdf, uv, 3000.0, 0.1) * 0.2;\n  //   alpha += absorb(sdf, uv, 1000.0, 0.3) * 0.15;\n  //   return alpha;\n  // }\n  \n  float ink(float sdf, vec2 uv) {\n    float alpha = 0.0;\n    alpha += absorb(sdf, uv, 600.0, 0.1) * 0.2;\n    alpha += absorb(sdf, uv, 300.0, 0.1) * 0.2;\n    alpha += absorb(sdf, uv, 20.0, 0.05) * 0.2;\n    alpha += absorb(sdf, uv, 400.0, 0.05) * 0.2;\n    alpha += absorb(sdf, uv, 100.0, 0.2) * 0.2;\n    return alpha;\n  }\n\n\n#define SDF_PX 8.0\n\nvoid main() {\n  float strokeWidth = u_ZIndexStrokeWidth.y;\n  vec4 fillColor = u_FillColor;\n  vec4 strokeColor = u_StrokeColor;\n  float opacity = u_Opacity.x;\n  float fillOpacity = u_Opacity.y;\n  float strokeOpacity = u_Opacity.z;\n  float shapeSizeAttenuation = u_Opacity.w;\n  vec4 dropShadow = u_DropShadow;\n  vec4 dropShadowColor = u_DropShadowColor;\n  float shadowDist;\n  float shadowBlurRadius = u_DropShadow.z;\n  \n  #ifdef USE_SDF_NONE\n    outputColor = texture(SAMPLER_2D(u_Texture), v_Uv);\n  #else\n    float dist;\n    lowp float buff;\n    vec2 shadowOffset = u_DropShadow.xy / u_AtlasSize;\n\n    #ifdef USE_SDF\n      #ifdef USE_EMOJI\n        fillColor = texture(SAMPLER_2D(u_Texture), v_Uv);\n      #endif\n      dist = texture(SAMPLER_2D(u_Texture), v_Uv).a;\n      buff = (256.0 - 64.0) / 256.0;\n\n      #ifdef USE_SHADOW\n        shadowDist = texture(SAMPLER_2D(u_Texture), v_Uv - shadowOffset).a;\n      #endif\n    #endif\n\n    #ifdef USE_MSDF\n      vec3 s = texture(SAMPLER_2D(u_Texture), v_Uv).rgb;\n      dist = median(s.r, s.g, s.b);\n      buff = 0.5;\n\n      #ifdef USE_SHADOW\n        vec3 shadowSample = texture(SAMPLER_2D(u_Texture), v_Uv - shadowOffset).rgb;\n        shadowDist = median(shadowSample.r, shadowSample.g, shadowSample.b);\n      #endif\n    #endif\n\n    float fontSize = u_ZIndexStrokeWidth.z;\n\n    highp float gamma_scaled;\n    highp float alpha = ink(dist - 0.2, v_Uv);\n    \n    opacity *= alpha;\n\n    outputColor = fillColor;\n  #endif\n  \n  outputColor.a *= opacity;\n\n  #ifdef USE_SHADOW \n    // gamma_scaled = fwidth(shadowDist) * 128.0 / shadowBlurRadius;\n    gamma_scaled = shadowBlurRadius / 128.0;\n    alpha = smoothstep(buff - gamma_scaled, buff + gamma_scaled, shadowDist);\n    dropShadowColor.a *= alpha;\n    outputColor = mix(dropShadowColor, outputColor, outputColor.a);\n  #endif\n\n  \n#ifdef USE_WIREFRAME\n  vec3 u_WireframeLineColor = vec3(0.0, 0.0, 0.0);\n\n  outputColor.xyz = mix(outputColor.xyz, u_WireframeLineColor, (1.0 - edgeFactor()));\n  if (any(lessThan(v_Barycentric, vec3(0.01)))) {\n    outputColor.a = 0.95;\n  }\n#endif\n\n\n  if (outputColor.a < epsilon)\n    discard;\n}\n";