@banuba/webar/dist/BanubaSDK.browser.js

Banuba WebAR SDK

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attribute vec2 a_position;
varying vec2 v_tex_uv;

void main() {
  v_tex_uv.x = (a_position.x + 1.) * .5;
  v_tex_uv.y = 1. - (a_position.y + 1.) * .5;
  gl_Position = vec4(a_position, 0., 1.);
}
`,Mu=`precision highp float;
#define GLSLIFY 1

varying vec2 v_tex_uv;

uniform sampler2D u_texture;
uniform vec2 u_viewsize;

/**
 * u_filters.x - denoising algorithm to use
 *   1 - FSR
 *   2 - Bilateral
 *   any other value - none
 * u_filters.y - light correction coefficient in [0, 2]
 *   1 - no light correction
 */
uniform vec2 u_filters;

// https://github.com/glslify/glslify#importing-a-glsl-module
// https://github.com/glslify/glslify#passing-references-between-modules
// Copyright (c) 2021 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// FidelityFX FSR v1.0.2 by AMD
// ported to mpv by agyild - https://gist.github.com/agyild/82219c545228d70c5604f865ce0b0ce5
// ported to WebGL by goingdigital - https://www.shadertoy.com/view/stXSWB
// using colorspace functions from tobspr - https://github.com/tobspr/GLSL-Color-Spaces/blob/master/ColorSpaces.inc.glsl

#define SHARPENING 2.0 // Sharpening intensity: Adjusts sharpening intensity by averaging the original pixels to the sharpened result. 1.0 is the unmodified default. 0.0 to 1.0.
#define CONTRAST 2.0 // Adjusts the range the shader adapts to high contrast (0 is not all the way off). Higher values = more high contrast sharpening. 0.0 to 1.0.
#define PERFORMANCE 1 // Whether to use optimizations for performance with loss of quality

// Used to convert from linear RGB to XYZ space
const mat3 RGB_2_XYZ_2717090884 = (mat3(
  0.4124564, 0.2126729, 0.0193339,
  0.3575761, 0.7151522, 0.1191920,
  0.1804375, 0.0721750, 0.9503041
));

// Used to convert from XYZ to linear RGB space
const mat3 XYZ_2_RGB_2717090884 = (mat3(
   3.2404542,-0.9692660, 0.0556434,
  -1.5371385, 1.8760108,-0.2040259,
  -0.4985314, 0.0415560, 1.0572252
));
// Converts a color from linear RGB to XYZ space
vec3 rgb_to_xyz_2717090884(vec3 rgb) {
  return RGB_2_XYZ_2717090884 * rgb;
}

// Converts a color from XYZ to linear RGB space
vec3 xyz_to_rgb_2717090884(vec3 xyz) {
  return XYZ_2_RGB_2717090884 * xyz;
}

/* EASU stage
*
* This takes a reduced resolution source, and scales it up while preserving detail.
*
* Updates:
*   stretch definition fixed. Thanks nehon for the bug report!
*/

vec3 FsrEasuCF(vec2 p) {
  vec2 uv = (p + .5) / u_viewsize;
  vec4 color = texture2D(u_texture, uv);
    return rgb_to_xyz_2717090884(color.rgb);
}

/**** EASU ****/
void FsrEasuCon(
  out vec4 con0,
  out vec4 con1,
  out vec4 con2,
  out vec4 con3,
  // This the rendered image resolution being upscaled
  vec2 inputViewportInPixels,
  // This is the resolution of the resource containing the input image (useful for dynamic resolution)
  vec2 inputSizeInPixels,
  // This is the display resolution which the input image gets upscaled to
  vec2 outputSizeInPixels
)
{
  // Output integer position to a pixel position in viewport.
  con0 = vec4(
    inputViewportInPixels.x/outputSizeInPixels.x,
    inputViewportInPixels.y/outputSizeInPixels.y,
    .5*inputViewportInPixels.x/outputSizeInPixels.x-.5,
    .5*inputViewportInPixels.y/outputSizeInPixels.y-.5
  );
  // Viewport pixel position to normalized image space.
  // This is used to get upper-left of 'F' tap.
  con1 = vec4(1.,1.,1.,-1.)/inputSizeInPixels.xyxy;
  // Centers of gather4, first offset from upper-left of 'F'.
  //      +---+---+
  //      |   |   |
  //      +--(0)--+
  //      | b | c |
  //  +---F---+---+---+
  //  | e | f | g | h |
  //  +--(1)--+--(2)--+
  //  | i | j | k | l |
  //  +---+---+---+---+
  //      | n | o |
  //      +--(3)--+
  //      |   |   |
  //      +---+---+
  // These are from (0) instead of 'F'.
  con2 = vec4(-1.,2.,1.,2.)/inputSizeInPixels.xyxy;
  con3 = vec4(0.,4.,0.,0.)/inputSizeInPixels.xyxy;
}

// Filtering for a given tap for the scalar.
void FsrEasuTapF(
  inout vec3 aC, // Accumulated color, with negative lobe.
  inout float aW, // Accumulated weight.
  vec2 off_0, // Pixel offset from resolve position to tap.
  vec2 dir_0, // Gradient direction.
  vec2 len_0, // Length.
  float lob_0, // Negative lobe strength.
  float clp_0, // Clipping point.
  vec3 c_0
)
{
  // Tap color.
  // Rotate offset by direction.
  vec2 v = vec2(dot(off_0, dir_0), dot(off_0,vec2(-dir_0.y,dir_0.x)));
  // Anisotropy.
  v *= len_0;
  // Compute distance^2.
  float d2 = min(dot(v,v),clp_0);
  // Limit to the window as at corner, 2 taps can easily be outside.
  // Approximation of lancos2 without sin() or rcp(), or sqrt() to get x.
  //  (25/16 * (2/5 * x^2 - 1)^2 - (25/16 - 1)) * (1/4 * x^2 - 1)^2
  //  |_______________________________________|   |_______________|
  //                   base                             window
  // The general form of the 'base' is,
  //  (a*(b*x^2-1)^2-(a-1))
  // Where 'a=1/(2*b-b^2)' and 'b' moves around the negative lobe.
  float wB = .4 * d2 - 1.;
  float wA = lob_0 * d2 -1.;
  wB *= wB;
  wA *= wA;
  wB = 1.5625*wB-.5625;
  float w=  wB * wA;
  // Do weighted average.
  aC += c_0*w;
  aW += w;
}

//------------------------------------------------------------------------------------------------------------------------------
// Accumulate direction and length.
void FsrEasuSetF(
    inout vec2 dir,
    inout float len,
    float w,
    float lA,float lB,float lC,float lD,float lE
)
{
  // Direction is the '+' diff.
  //    a
  //  b c d
  //    e
  // Then takes magnitude from abs average of both sides of 'c'.
  // Length converts gradient reversal to 0, smoothly to non-reversal at 1, shaped, then adding horz and vert terms.
  float lenX = max(abs(lD - lC), abs(lC - lB));
  float dirX = lD - lB;
  dir.x += dirX * w;
  lenX = clamp(abs(dirX)/lenX,0.,1.);
  lenX *= lenX;
  len += lenX * w;
  // Repeat for the y axis.
  float lenY = max(abs(lE - lC), abs(lC - lA));
  float dirY = lE - lA;
  dir.y += dirY * w;
  lenY = clamp(abs(dirY) / lenY,0.,1.);
  lenY *= lenY;
  len += lenY * w;
}

//------------------------------------------------------------------------------------------------------------------------------
void FsrEasuF(
  out vec3 pix,
  vec2 ip, // Integer pixel position in output.
  // Constants generated by FsrEasuCon().
  vec4 con0, // xy = output to input scale, zw = first pixel offset correction
  vec4 con1_0,
  vec4 con2_0,
  vec4 con3_0
)
{
  //------------------------------------------------------------------------------------------------------------------------------
  // Get position of 'f'.
  vec2 pp = ip * con0.xy + con0.zw; // Corresponding input pixel/subpixel
  vec2 fp = floor(pp);// fp = source nearest pixel
  pp -= fp; // pp = source subpixel

  //------------------------------------------------------------------------------------------------------------------------------
  // 12-tap kernel.
  //    b c
  //  e f g h
  //  i j k l
  //    n o
  // Gather 4 ordering.
  //  a b
  //  r g
  vec2 p0 = fp * con1_0.xy + con1_0.zw;
  
  // These are from p0 to avoid pulling two constants on pre-Navi hardware.
  vec2 p1 = p0 + con2_0.xy;
  vec2 p2 = p0 + con2_0.zw;
  vec2 p3 = p0 + con3_0.xy;

  // TextureGather is not available on WebGL2
  vec4 off = vec4(-.5,.5,-.5,.5)*con1_0.xxyy;
  // textureGather to texture offsets
  // x=west y=east z=north w=south
  vec3 bC = FsrEasuCF(p0 + off.xw); float bL = bC.g + 0.5 *(bC.r + bC.b);
  vec3 cC = FsrEasuCF(p0 + off.yw); float cL = cC.g + 0.5 *(cC.r + cC.b);
  vec3 iC = FsrEasuCF(p1 + off.xw); float iL = iC.g + 0.5 *(iC.r + iC.b);
  vec3 jC = FsrEasuCF(p1 + off.yw); float jL = jC.g + 0.5 *(jC.r + jC.b);
  vec3 fC = FsrEasuCF(p1 + off.yz); float fL = fC.g + 0.5 *(fC.r + fC.b);
  vec3 eC = FsrEasuCF(p1 + off.xz); float eL = eC.g + 0.5 *(eC.r + eC.b);
  vec3 kC = FsrEasuCF(p2 + off.xw); float kL = kC.g + 0.5 *(kC.r + kC.b);
  vec3 lC = FsrEasuCF(p2 + off.yw); float lL = lC.g + 0.5 *(lC.r + lC.b);
  vec3 hC = FsrEasuCF(p2 + off.yz); float hL = hC.g + 0.5 *(hC.r + hC.b);
  vec3 gC = FsrEasuCF(p2 + off.xz); float gL = gC.g + 0.5 *(gC.r + gC.b);
  vec3 oC = FsrEasuCF(p3 + off.yz); float oL = oC.g + 0.5 *(oC.r + oC.b);
  vec3 nC = FsrEasuCF(p3 + off.xz); float nL = nC.g + 0.5 *(nC.r + nC.b);
 
  //------------------------------------------------------------------------------------------------------------------------------
  // Simplest multi-channel approximate luma possible (luma times 2, in 2 FMA/MAD).
  // Accumulate for bilinear interpolation.
  vec2 dir = vec2(0.);
  float len = 0.;

  FsrEasuSetF(dir, len, (1.-pp.x)*(1.-pp.y), bL, eL, fL, gL, jL);
  FsrEasuSetF(dir, len,    pp.x  *(1.-pp.y), cL, fL, gL, hL, kL);
  FsrEasuSetF(dir, len, (1.-pp.x)*  pp.y  , fL, iL, jL, kL, nL);
  FsrEasuSetF(dir, len,    pp.x  *  pp.y  , gL, jL, kL, lL, oL);

  //------------------------------------------------------------------------------------------------------------------------------
  // Normalize with approximation, and cleanup close to zero.
  vec2 dir2 = dir * dir;
  float dirR = dir2.x + dir2.y;
  bool zro = dirR < (1.0/32768.0);
  dirR = inversesqrt(dirR);
#if (PERFORMANCE == 1)
  if (zro) {
    vec4 w = vec4(0.0);
    w.x = (1.0 - pp.x) * (1.0 - pp.y);
    w.y =        pp.x  * (1.0 - pp.y);
    w.z = (1.0 - pp.x) *        pp.y;
    w.w =        pp.x  *        pp.y;
    pix.r = clamp(dot(w, vec4(fL, gL, jL, kL)), 0.0, 1.0);
    return;
  }
#elif (PERFORMANCE == 0)
  dirR = zro ? 1.0 : dirR;
  dir.x = zro ? 1.0 : dir.x;
#endif
  dir *= vec2(dirR);
  // Transform from {0 to 2} to {0 to 1} range, and shape with square.
  len = len * 0.5;
  len *= len;
  // Stretch kernel {1.0 vert|horz, to sqrt(2.0) on diagonal}.
  float stretch = dot(dir,dir) / (max(abs(dir.x), abs(dir.y)));
  // Anisotropic length after rotation,
  //  x := 1.0 lerp to 'stretch' on edges
  //  y := 1.0 lerp to 2x on edges
  vec2 len2 = vec2(1. +(stretch-1.0)*len, 1. -.5 * len);
  // Based on the amount of 'edge',
  // the window shifts from +/-{sqrt(2.0) to slightly beyond 2.0}.
  float lob = .5 - .29 * len;
  // Set distance^2 clipping point to the end of the adjustable window.
  float clp = 1./lob;

  //------------------------------------------------------------------------------------------------------------------------------
  // Accumulation mixed with min/max of 4 nearest.
  //    b c
  //  e f g h
  //  i j k l
  //    n o
  // Accumulation.
  vec3 aC = vec3(0);
  float aW = 0.;
  FsrEasuTapF(aC, aW, vec2( 0.,-1.)-pp, dir, len2, lob, clp, bC);
  FsrEasuTapF(aC, aW, vec2( 1.,-1.)-pp, dir, len2, lob, clp, cC);
  FsrEasuTapF(aC, aW, vec2(-1., 1.)-pp, dir, len2, lob, clp, iC);
  FsrEasuTapF(aC, aW, vec2( 0., 1.)-pp, dir, len2, lob, clp, jC);
  FsrEasuTapF(aC, aW, vec2( 0., 0.)-pp, dir, len2, lob, clp, fC);
  FsrEasuTapF(aC, aW, vec2(-1., 0.)-pp, dir, len2, lob, clp, eC);
  FsrEasuTapF(aC, aW, vec2( 1., 1.)-pp, dir, len2, lob, clp, kC);
  FsrEasuTapF(aC, aW, vec2( 2., 1.)-pp, dir, len2, lob, clp, lC);
  FsrEasuTapF(aC, aW, vec2( 2., 0.)-pp, dir, len2, lob, clp, hC);
  FsrEasuTapF(aC, aW, vec2( 1., 0.)-pp, dir, len2, lob, clp, gC);
  FsrEasuTapF(aC, aW, vec2( 1., 2.)-pp, dir, len2, lob, clp, oC);
  FsrEasuTapF(aC, aW, vec2( 0., 2.)-pp, dir, len2, lob, clp, nC);
  //------------------------------------------------------------------------------------------------------------------------------
  // Normalize and dering.
#if (PERFORMANCE == 1)
pix = aC/aW;
#elif (PERFORMANCE == 0)
  vec3 min4 = min(min(fC,gC),min(jC,kC));
  vec3 max4 = max(max(fC,gC),max(jC,kC));
  pix=min(max4,max(min4,aC/aW));
#endif
}

void EASU( out vec4 fragColor, in vec2 fragCoord )
{
  vec3 c;
  vec4 con0,con1,con2,con3;
  
  // "rendersize" refers to size of source image before upscaling.
  vec2 rendersize = u_viewsize;
  FsrEasuCon(
    con0, con1, con2, con3, rendersize, rendersize, rendersize
  );
  FsrEasuF(c, fragCoord, con0, con1, con2, con3);
  
  fragColor = vec4(xyz_to_rgb_2717090884(c.xyz), 1);
}

vec4 getPixel(vec2 pos) {
  vec2 coord = (pos + .5) / u_viewsize;
  coord.y = 1.0 - coord.y;
  return texture2D(u_texture, coord);
}

vec4 fsr_easu_2717090884(vec2 uv) {
  vec4 e = getPixel(gl_FragCoord.xy);

    
  vec4 e_xyz = vec4(rgb_to_xyz_2717090884(e.rgb), 1);
  EASU(e_xyz, (gl_FragCoord.xy + 0.5) / u_viewsize);  
  
  // fetch a 3x3 neighborhood around the pixel 'e',
  //  a b c
  //  d(e)f
  //  g h i 
  vec3 a = getPixel(gl_FragCoord.xy + vec2(-1.0,-1.0)).rgb;
  vec3 b = getPixel(gl_FragCoord.xy + vec2( 0.0,-1.0)).rgb;
  vec3 c = getPixel(gl_FragCoord.xy + vec2( 1.0,-1.0)).rgb;
  vec3 f = getPixel(gl_FragCoord.xy + vec2( 1.0, 0.0)).rgb;
  vec3 g = getPixel(gl_FragCoord.xy + vec2(-1.0, 1.0)).rgb;
  vec3 h = getPixel(gl_FragCoord.xy + vec2( 0.0, 1.0)).rgb;
  vec3 d = getPixel(gl_FragCoord.xy + vec2(-1.0, 0.0)).rgb;
  vec3 i = getPixel(gl_FragCoord.xy + vec2( 1.0, 1.0)).rgb;;
  // Soft min and max.
  //  a b c     b
  //  d e f * 0.5 + d e f * 0.5
  //  g h i     h
  // These are 2.0x bigger (factored out the extra multiply).

  vec3 mnRGB = min(min(min(d, e.rgb), min(f, b)), h);
  vec3 mnRGB2 = min(mnRGB, min(min(a, c), min(g, i)));
  mnRGB += mnRGB2;

  vec3 mxRGB = max(max(max(d, e.rgb), max(f, b)), h);
  vec3 mxRGB2 = max(mxRGB, max(max(a, c), max(g, i)));
  mxRGB += mxRGB2;

  // Smooth minimum distance to signal limit divided by smooth max.
  vec3 rcpMRGB = 1.0 / mxRGB;
  vec3 ampRGB = clamp(min(mnRGB, 2.0 - mxRGB) * rcpMRGB, 0.0, 1.0);

  // Shaping amount of sharpening.
  ampRGB = inversesqrt(ampRGB);

  float peak = -3.0 * clamp(CONTRAST, 0.0, 1.0) + 8.0;
  vec3 wRGB = -(1.0 / (ampRGB * peak));

  vec3 rcpWeightRGB = 1.0 / (4.0 * wRGB + 1.0);

  //          0 w 0
  //  Filter shape: w 1 w
  //          0 w 0
  vec3 window = (b + d) + (f + h);
  vec3 outColor = clamp((window * wRGB + e.rgb) * rcpWeightRGB, 0.0, 1.0);

  return vec4(mix(e.rgb, outColor, SHARPENING), e.a);
}

// https://github.com/glslify/glslify#exporting-a-glsl-module

#define DIFF 1.0
#define RADIUS 4.0

void bilateral_iter_3977570374(vec2 random_dir, vec2 radius, float diff, vec4 pixel, vec2 uv, inout vec3 result, inout float totalWeight)
{
  vec2 dir = random_dir * radius;
  vec3 randomPixel = texture2D(u_texture, uv + dir).xyz;
  vec3 delta = randomPixel - pixel.rgb;
  float weight = exp(-dot(delta, delta) / diff);
  result += randomPixel * weight;
  totalWeight += weight;
}

vec4 bilateral(vec2 uv)
{
  vec2 radius = (RADIUS / u_viewsize);
  float diff = DIFF / 255.0;
  vec4 pixel = texture2D(u_texture, uv);
  vec3 result = vec3(0.0, 0.0, 0.0);
  float totalWeight = 0.0;

  // uroll loop and substitute precalculated random vectors for GLSL 1.0 ES:

  bilateral_iter_3977570374(vec2(-0.886051297,0.447155535), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(0.270759493,0.537728608), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.896959424,0.440607518), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.804274619,0.125076547), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(0.373693645,0.240383312), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.850325704,-0.192106694), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.453608066,0.889671504), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.280496657,0.206442386), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(0.840040743,-0.36367026), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.151598319,-0.884027064), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.221440807,0.593896627), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.797481239,-0.243254974), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(0.48824361,0.225083455), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.0387817062,0.838459492), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(0.92897892,-0.133588716), radius, diff, pixel, uv, result, totalWeight);
  bilateral_iter_3977570374(vec2(-0.693672359,-0.706737161), radius, diff, pixel, uv, result, totalWeight);
  
  result = result / totalWeight;    
  return vec4(result, pixel.a);
}

// https://github.com/glslify/glslify#exporting-a-glsl-module

vec3 rgb2hsv(vec3 c)
{
  vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
  vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
  vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
  float d = q.x - min(q.w, q.y);
  float e = 1.0e-10;
  return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
}

vec3 hsv2rgb(vec3 c)
{
  vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
  vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
  return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
}

vec4 light_correction_1117569599(vec4 c, float s)
{
  vec3 hsv = rgb2hsv(c.rgb);
  hsv.y = pow(hsv.y, pow(s, -0.5));
  hsv.z = pow(hsv.z, s);
  vec3 rgb = hsv2rgb(hsv);
  return vec4(rgb, c.a);
}

// https://github.com/glslify/glslify#exporting-a-glsl-module

void main() {
  vec4 c;

  if (u_filters.x == 1.)
    c = fsr_easu_2717090884(v_tex_uv);
  else if (u_filters.x == 2.)
    c = bilateral(v_tex_uv);
  else
    c = texture2D(u_texture, v_tex_uv);

  if (u_filters.y != 1.)
    c = light_correction_1117569599(c, u_filters.y);

  gl_FragColor = c;
}`,Bu=(r,o,s)=>{const u=r.createProgram();return r.attachShader(u,o),r.attachShader(u,s),r.linkProgram(u),r.useProgram(u),u},la=(r,o,s)=>{const u=r.createShader(o);return r.shaderSource(u,s),r.compileShader(u),u},ju=r=>{const o=r.createTexture();return r.bindTexture(r.TEXTURE_2D,o),r.texImage2D(r.TEXTURE_2D,0,r.RGB,1,1,0,r.RGB,r.UNSIGNED_BYTE,null),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_WRAP_S,r.CLAMP_TO_EDGE),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_WRAP_T,r.CLAMP_TO_EDGE),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_MIN_FILTER,r.NEAREST),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_MAG_FILTER,r.LINEAR),r.bindTexture(r.TEXTURE_2D,null),o},ua=(r,o)=>{let s=0,u=1;const g=document.createElement("canvas"),v=g.captureStream(30),E=g.getContext("webgl"),y=la(E,E.VERTEX_SHADER,Ou),F=la(E,E.FRAGMENT_SHADER,Mu),L=Bu(E,y,F),j=ju(E);E.bindTexture(E.TEXTURE_2D,j);const G=E.getAttribLocation(L,"a_position"),$=E.createBuffer();E.bindBuffer(E.ARRAY_BUFFER,$),E.bufferData(E.ARRAY_BUFFER,new Float32Array([-1,-1,1,-1,-1,1,-1,1,1,-1,1,1]),E.STATIC_DRAW),E.enableVertexAttribArray(G),E.vertexAttribPointer(G,2,E.FLOAT,!1,0,0);const Z=E.getUniformLocation(L,"u_viewsize"),H=E.getUniformLocation(L,"u_filters");E.uniform2fv(H,new Float32Array([s,u])),Jr(r).then(se=>{const ge=se.requestVideoFrameCallback?.bind(se)||ri.requestAnimationFrame;(function Q(){se.ended||!v.active||(ge(Q),E.texImage2D(E.TEXTURE_2D,0,E.RGBA,E.RGBA,E.UNSIGNED_BYTE,se),(g.width!==se.videoWidth||g.height!==se.videoHeight)&&(E.viewport(0,0,g.width=se.videoWidth,g.height=se.videoHeight),E.uniform2fv(Z,new Float32Array([g.width,g.height]))),E.drawArrays(E.TRIANGLES,0,6))})()}),E.deleteProgram(L),E.deleteShader(F),E.deleteShader(y);const Le={stream:v,denoise(se){E.uniform2fv(H,new Float32Array([s=se,u]))},exposureCompensation(se){E.uniform2fv(H,new Float32Array([s,u=se]))}};if(o)for(const[se,ge]of Object.entries(o))Le[se](ge);return Le},Uu=typeof screen<"u"&&screen.height>screen.width,rn={facingMode:"user",width:{min:640,ideal:1280,max:1920},height:{min:480,ideal:720,max:1080},resizeMode:{ideal:"crop-and-scale"}};Uu&&(delete rn.width,delete rn.height);class Wu{constructor(o){te(this,"_stream",null),te(this,"_constraints"),te(this,"_preferences",{}),te(this,"_enhancer",null),te(this,"kind","stream"),this._constraints={...rn,...o}}get active(){return!!this._stream}denoise(o){this._preferences.denoise=Number(o),this._enhancer?.denoise(this._preferences.denoise)}setExposureCompensation(o){this._preferences.exposureCompensation=o,this._enhancer?.exposureCompensation(this._preferences.exposureCompensation)}async start(){return await(this._stream??(this._stream=ca(this._constraints))),this}async*[Symbol.asyncIterator](o){const s=await(this._stream??(this._stream=ca(this._constraints))),u=this._enhancer=ui(this._preferences)?ua(s,this._preferences):null;let g=new tn(u?u.stream:s)[Symbol.asyncIterator]({horizontalFlip:!0,...o}),v;for(;;){if(!this._enhancer&&ui(this._preferences)){const F=this._enhancer=ua(s,this._preferences);g=new tn(F.stream)[Symbol.asyncIterator]({horizontalFlip:!0,...o})}this._enhancer&&!ui(this._preferences)&&(this._enhancer.stream.getTracks().forEach(F=>F.stop()),this._enhancer=null,g=new tn(s)[Symbol.asyncIterator]({horizontalFlip:!0,...o}));const{done:E,value:y}=await g.next(v);if(E)break;v=yield y}this.stop()}stop(){this._stream&&this._stream.then(o=>o.getTracks().forEach(s=>s.stop())),this._enhancer&&this._enhancer.stream.getTracks().forEach(o=>o.stop()),this._stream=null,this._enhancer=null}}const ca=async r=>{if(typeof navigator.mediaDevices>"u")throw new Error(`SecureContext is required to access webcam
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