Add GLSL shader node using PyOpenGL (#12148)

* adds support for executing simple glsl shaders
using moderngl package

* tidy

* Support multiple outputs

* Try fix build

* fix casing

* fix line endings

* convert to using PyOpenGL and glfw

* remove cpu support

* tidy

* add additional support for egl & osmesa backends

* fix ci
perf: only read required outputs

* add diagnostics, update mac initialization

* GLSL glueprints + node fixes (#12492)

* Add image operation blueprints

* Add channels

* Add glow

* brightness/contrast

* hsb

* add glsl shader update system

* shader nit iteration

* add multipass for faster blur

* more fixes

* rebuild blueprints

* print -> logger

* Add edge preserving blur

* fix: move _initialized flag to end of GLContext.__init__

Prevents '_vao' attribute error when init fails partway through
and subsequent calls skip initialization due to early _initialized flag.

* update valid ranges
- threshold 0-100
- step 0+

* fix value ranges

* rebuild node to remove extra inputs

* Fix gamma step

* clamp saturation in colorize instead of wrapping

* Fix crash on 1x1 px images

* rework description

* remove unnecessary f


Co-authored-by: Jedrzej Kosinski <kosinkadink1@gmail.com>
Co-authored-by: Hunter Senft-Grupp <hunter@comfy.org>
This commit is contained in:
pythongosssss
2026-02-20 04:22:13 +00:00
committed by GitHub
parent 5f2117528a
commit 96d6bd1a4a
29 changed files with 2155 additions and 0 deletions
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform float u_float0; // Brightness slider -100..100
uniform float u_float1; // Contrast slider -100..100
in vec2 v_texCoord;
out vec4 fragColor;
const float MID_GRAY = 0.18; // 18% reflectance
// sRGB gamma 2.2 approximation
vec3 srgbToLinear(vec3 c) {
return pow(max(c, 0.0), vec3(2.2));
}
vec3 linearToSrgb(vec3 c) {
return pow(max(c, 0.0), vec3(1.0/2.2));
}
float mapBrightness(float b) {
return clamp(b / 100.0, -1.0, 1.0);
}
float mapContrast(float c) {
return clamp(c / 100.0 + 1.0, 0.0, 2.0);
}
void main() {
vec4 orig = texture(u_image0, v_texCoord);
float brightness = mapBrightness(u_float0);
float contrast = mapContrast(u_float1);
vec3 lin = srgbToLinear(orig.rgb);
lin = (lin - MID_GRAY) * contrast + brightness + MID_GRAY;
// Convert back to sRGB
vec3 result = linearToSrgb(clamp(lin, 0.0, 1.0));
fragColor = vec4(result, orig.a);
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform vec2 u_resolution;
uniform int u_int0; // Mode
uniform float u_float0; // Amount (0 to 100)
in vec2 v_texCoord;
out vec4 fragColor;
const int MODE_LINEAR = 0;
const int MODE_RADIAL = 1;
const int MODE_BARREL = 2;
const int MODE_SWIRL = 3;
const int MODE_DIAGONAL = 4;
const float AMOUNT_SCALE = 0.0005;
const float RADIAL_MULT = 4.0;
const float BARREL_MULT = 8.0;
const float INV_SQRT2 = 0.70710678118;
void main() {
vec2 uv = v_texCoord;
vec4 original = texture(u_image0, uv);
float amount = u_float0 * AMOUNT_SCALE;
if (amount < 0.000001) {
fragColor = original;
return;
}
// Aspect-corrected coordinates for circular effects
float aspect = u_resolution.x / u_resolution.y;
vec2 centered = uv - 0.5;
vec2 corrected = vec2(centered.x * aspect, centered.y);
float r = length(corrected);
vec2 dir = r > 0.0001 ? corrected / r : vec2(0.0);
vec2 offset = vec2(0.0);
if (u_int0 == MODE_LINEAR) {
// Horizontal shift (no aspect correction needed)
offset = vec2(amount, 0.0);
}
else if (u_int0 == MODE_RADIAL) {
// Outward from center, stronger at edges
offset = dir * r * amount * RADIAL_MULT;
offset.x /= aspect; // Convert back to UV space
}
else if (u_int0 == MODE_BARREL) {
// Lens distortion simulation (r² falloff)
offset = dir * r * r * amount * BARREL_MULT;
offset.x /= aspect; // Convert back to UV space
}
else if (u_int0 == MODE_SWIRL) {
// Perpendicular to radial (rotational aberration)
vec2 perp = vec2(-dir.y, dir.x);
offset = perp * r * amount * RADIAL_MULT;
offset.x /= aspect; // Convert back to UV space
}
else if (u_int0 == MODE_DIAGONAL) {
// 45° offset (no aspect correction needed)
offset = vec2(amount, amount) * INV_SQRT2;
}
float red = texture(u_image0, uv + offset).r;
float green = original.g;
float blue = texture(u_image0, uv - offset).b;
fragColor = vec4(red, green, blue, original.a);
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform float u_float0; // temperature (-100 to 100)
uniform float u_float1; // tint (-100 to 100)
uniform float u_float2; // vibrance (-100 to 100)
uniform float u_float3; // saturation (-100 to 100)
in vec2 v_texCoord;
out vec4 fragColor;
const float INPUT_SCALE = 0.01;
const float TEMP_TINT_PRIMARY = 0.3;
const float TEMP_TINT_SECONDARY = 0.15;
const float VIBRANCE_BOOST = 2.0;
const float SATURATION_BOOST = 2.0;
const float SKIN_PROTECTION = 0.5;
const float EPSILON = 0.001;
const vec3 LUMA_WEIGHTS = vec3(0.299, 0.587, 0.114);
void main() {
vec4 tex = texture(u_image0, v_texCoord);
vec3 color = tex.rgb;
// Scale inputs: -100/100 → -1/1
float temperature = u_float0 * INPUT_SCALE;
float tint = u_float1 * INPUT_SCALE;
float vibrance = u_float2 * INPUT_SCALE;
float saturation = u_float3 * INPUT_SCALE;
// Temperature (warm/cool): positive = warm, negative = cool
color.r += temperature * TEMP_TINT_PRIMARY;
color.b -= temperature * TEMP_TINT_PRIMARY;
// Tint (green/magenta): positive = green, negative = magenta
color.g += tint * TEMP_TINT_PRIMARY;
color.r -= tint * TEMP_TINT_SECONDARY;
color.b -= tint * TEMP_TINT_SECONDARY;
// Single clamp after temperature/tint
color = clamp(color, 0.0, 1.0);
// Vibrance with skin protection
if (vibrance != 0.0) {
float maxC = max(color.r, max(color.g, color.b));
float minC = min(color.r, min(color.g, color.b));
float sat = maxC - minC;
float gray = dot(color, LUMA_WEIGHTS);
if (vibrance < 0.0) {
// Desaturate: -100 → gray
color = mix(vec3(gray), color, 1.0 + vibrance);
} else {
// Boost less saturated colors more
float vibranceAmt = vibrance * (1.0 - sat);
// Branchless skin tone protection
float isWarmTone = step(color.b, color.g) * step(color.g, color.r);
float warmth = (color.r - color.b) / max(maxC, EPSILON);
float skinTone = isWarmTone * warmth * sat * (1.0 - sat);
vibranceAmt *= (1.0 - skinTone * SKIN_PROTECTION);
color = mix(vec3(gray), color, 1.0 + vibranceAmt * VIBRANCE_BOOST);
}
}
// Saturation
if (saturation != 0.0) {
float gray = dot(color, LUMA_WEIGHTS);
float satMix = saturation < 0.0
? 1.0 + saturation // -100 → gray
: 1.0 + saturation * SATURATION_BOOST; // +100 → 3x boost
color = mix(vec3(gray), color, satMix);
}
fragColor = vec4(clamp(color, 0.0, 1.0), tex.a);
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform float u_float0; // Blur radius (020, default ~5)
uniform float u_float1; // Edge threshold (0100, default ~30)
uniform int u_int0; // Step size (0/1 = every pixel, 2+ = skip pixels)
in vec2 v_texCoord;
out vec4 fragColor;
const int MAX_RADIUS = 20;
const float EPSILON = 0.0001;
// Perceptual luminance
float getLuminance(vec3 rgb) {
return dot(rgb, vec3(0.299, 0.587, 0.114));
}
vec4 bilateralFilter(vec2 uv, vec2 texelSize, int radius,
float sigmaSpatial, float sigmaColor)
{
vec4 center = texture(u_image0, uv);
vec3 centerRGB = center.rgb;
float invSpatial2 = -0.5 / (sigmaSpatial * sigmaSpatial);
float invColor2 = -0.5 / (sigmaColor * sigmaColor + EPSILON);
vec3 sumRGB = vec3(0.0);
float sumWeight = 0.0;
int step = max(u_int0, 1);
float radius2 = float(radius * radius);
for (int dy = -MAX_RADIUS; dy <= MAX_RADIUS; dy++) {
if (dy < -radius || dy > radius) continue;
if (abs(dy) % step != 0) continue;
for (int dx = -MAX_RADIUS; dx <= MAX_RADIUS; dx++) {
if (dx < -radius || dx > radius) continue;
if (abs(dx) % step != 0) continue;
vec2 offset = vec2(float(dx), float(dy));
float dist2 = dot(offset, offset);
if (dist2 > radius2) continue;
vec3 sampleRGB = texture(u_image0, uv + offset * texelSize).rgb;
// Spatial Gaussian
float spatialWeight = exp(dist2 * invSpatial2);
// Perceptual color distance (weighted RGB)
vec3 diff = sampleRGB - centerRGB;
float colorDist = dot(diff * diff, vec3(0.299, 0.587, 0.114));
float colorWeight = exp(colorDist * invColor2);
float w = spatialWeight * colorWeight;
sumRGB += sampleRGB * w;
sumWeight += w;
}
}
vec3 resultRGB = sumRGB / max(sumWeight, EPSILON);
return vec4(resultRGB, center.a); // preserve center alpha
}
void main() {
vec2 texelSize = 1.0 / vec2(textureSize(u_image0, 0));
float radiusF = clamp(u_float0, 0.0, float(MAX_RADIUS));
int radius = int(radiusF + 0.5);
if (radius == 0) {
fragColor = texture(u_image0, v_texCoord);
return;
}
// Edge threshold → color sigma
// Squared curve for better low-end control
float t = clamp(u_float1, 0.0, 100.0) / 100.0;
t *= t;
float sigmaColor = mix(0.01, 0.5, t);
// Spatial sigma tied to radius
float sigmaSpatial = max(radiusF * 0.75, 0.5);
fragColor = bilateralFilter(
v_texCoord,
texelSize,
radius,
sigmaSpatial,
sigmaColor
);
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform vec2 u_resolution;
uniform float u_float0; // grain amount [0.0 1.0] typical: 0.20.8
uniform float u_float1; // grain size [0.3 3.0] lower = finer grain
uniform float u_float2; // color amount [0.0 1.0] 0 = monochrome, 1 = RGB grain
uniform float u_float3; // luminance bias [0.0 1.0] 0 = uniform, 1 = shadows only
uniform int u_int0; // noise mode [0 or 1] 0 = smooth, 1 = grainy
in vec2 v_texCoord;
layout(location = 0) out vec4 fragColor0;
// High-quality integer hash (pcg-like)
uint pcg(uint v) {
uint state = v * 747796405u + 2891336453u;
uint word = ((state >> ((state >> 28u) + 4u)) ^ state) * 277803737u;
return (word >> 22u) ^ word;
}
// 2D -> 1D hash input
uint hash2d(uvec2 p) {
return pcg(p.x + pcg(p.y));
}
// Hash to float [0, 1]
float hashf(uvec2 p) {
return float(hash2d(p)) / float(0xffffffffu);
}
// Hash to float with offset (for RGB channels)
float hashf(uvec2 p, uint offset) {
return float(pcg(hash2d(p) + offset)) / float(0xffffffffu);
}
// Convert uniform [0,1] to roughly Gaussian distribution
// Using simple approximation: average of multiple samples
float toGaussian(uvec2 p) {
float sum = hashf(p, 0u) + hashf(p, 1u) + hashf(p, 2u) + hashf(p, 3u);
return (sum - 2.0) * 0.7; // Centered, scaled
}
float toGaussian(uvec2 p, uint offset) {
float sum = hashf(p, offset) + hashf(p, offset + 1u)
+ hashf(p, offset + 2u) + hashf(p, offset + 3u);
return (sum - 2.0) * 0.7;
}
// Smooth noise with better interpolation
float smoothNoise(vec2 p) {
vec2 i = floor(p);
vec2 f = fract(p);
// Quintic interpolation (less banding than cubic)
f = f * f * f * (f * (f * 6.0 - 15.0) + 10.0);
uvec2 ui = uvec2(i);
float a = toGaussian(ui);
float b = toGaussian(ui + uvec2(1u, 0u));
float c = toGaussian(ui + uvec2(0u, 1u));
float d = toGaussian(ui + uvec2(1u, 1u));
return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
}
float smoothNoise(vec2 p, uint offset) {
vec2 i = floor(p);
vec2 f = fract(p);
f = f * f * f * (f * (f * 6.0 - 15.0) + 10.0);
uvec2 ui = uvec2(i);
float a = toGaussian(ui, offset);
float b = toGaussian(ui + uvec2(1u, 0u), offset);
float c = toGaussian(ui + uvec2(0u, 1u), offset);
float d = toGaussian(ui + uvec2(1u, 1u), offset);
return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
}
void main() {
vec4 color = texture(u_image0, v_texCoord);
// Luminance (Rec.709)
float luma = dot(color.rgb, vec3(0.2126, 0.7152, 0.0722));
// Grain UV (resolution-independent)
vec2 grainUV = v_texCoord * u_resolution / max(u_float1, 0.01);
uvec2 grainPixel = uvec2(grainUV);
float g;
vec3 grainRGB;
if (u_int0 == 1) {
// Grainy mode: pure hash noise (no interpolation = no banding)
g = toGaussian(grainPixel);
grainRGB = vec3(
toGaussian(grainPixel, 100u),
toGaussian(grainPixel, 200u),
toGaussian(grainPixel, 300u)
);
} else {
// Smooth mode: interpolated with quintic curve
g = smoothNoise(grainUV);
grainRGB = vec3(
smoothNoise(grainUV, 100u),
smoothNoise(grainUV, 200u),
smoothNoise(grainUV, 300u)
);
}
// Luminance weighting (less grain in highlights)
float lumWeight = mix(1.0, 1.0 - luma, clamp(u_float3, 0.0, 1.0));
// Strength
float strength = u_float0 * 0.15;
// Color vs monochrome grain
vec3 grainColor = mix(vec3(g), grainRGB, clamp(u_float2, 0.0, 1.0));
color.rgb += grainColor * strength * lumWeight;
fragColor0 = vec4(clamp(color.rgb, 0.0, 1.0), color.a);
}
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#version 300 es
precision mediump float;
uniform sampler2D u_image0;
uniform vec2 u_resolution;
uniform int u_int0; // Blend mode
uniform int u_int1; // Color tint
uniform float u_float0; // Intensity
uniform float u_float1; // Radius
uniform float u_float2; // Threshold
in vec2 v_texCoord;
out vec4 fragColor;
const int BLEND_ADD = 0;
const int BLEND_SCREEN = 1;
const int BLEND_SOFT = 2;
const int BLEND_OVERLAY = 3;
const int BLEND_LIGHTEN = 4;
const float GOLDEN_ANGLE = 2.39996323;
const int MAX_SAMPLES = 48;
const vec3 LUMA = vec3(0.299, 0.587, 0.114);
float hash(vec2 p) {
p = fract(p * vec2(123.34, 456.21));
p += dot(p, p + 45.32);
return fract(p.x * p.y);
}
vec3 hexToRgb(int h) {
return vec3(
float((h >> 16) & 255),
float((h >> 8) & 255),
float(h & 255)
) * (1.0 / 255.0);
}
vec3 blend(vec3 base, vec3 glow, int mode) {
if (mode == BLEND_SCREEN) {
return 1.0 - (1.0 - base) * (1.0 - glow);
}
if (mode == BLEND_SOFT) {
return mix(
base - (1.0 - 2.0 * glow) * base * (1.0 - base),
base + (2.0 * glow - 1.0) * (sqrt(base) - base),
step(0.5, glow)
);
}
if (mode == BLEND_OVERLAY) {
return mix(
2.0 * base * glow,
1.0 - 2.0 * (1.0 - base) * (1.0 - glow),
step(0.5, base)
);
}
if (mode == BLEND_LIGHTEN) {
return max(base, glow);
}
return base + glow;
}
void main() {
vec4 original = texture(u_image0, v_texCoord);
float intensity = u_float0 * 0.05;
float radius = u_float1 * u_float1 * 0.012;
if (intensity < 0.001 || radius < 0.1) {
fragColor = original;
return;
}
float threshold = 1.0 - u_float2 * 0.01;
float t0 = threshold - 0.15;
float t1 = threshold + 0.15;
vec2 texelSize = 1.0 / u_resolution;
float radius2 = radius * radius;
float sampleScale = clamp(radius * 0.75, 0.35, 1.0);
int samples = int(float(MAX_SAMPLES) * sampleScale);
float noise = hash(gl_FragCoord.xy);
float angleOffset = noise * GOLDEN_ANGLE;
float radiusJitter = 0.85 + noise * 0.3;
float ca = cos(GOLDEN_ANGLE);
float sa = sin(GOLDEN_ANGLE);
vec2 dir = vec2(cos(angleOffset), sin(angleOffset));
vec3 glow = vec3(0.0);
float totalWeight = 0.0;
// Center tap
float centerMask = smoothstep(t0, t1, dot(original.rgb, LUMA));
glow += original.rgb * centerMask * 2.0;
totalWeight += 2.0;
for (int i = 1; i < MAX_SAMPLES; i++) {
if (i >= samples) break;
float fi = float(i);
float dist = sqrt(fi / float(samples)) * radius * radiusJitter;
vec2 offset = dir * dist * texelSize;
vec3 c = texture(u_image0, v_texCoord + offset).rgb;
float mask = smoothstep(t0, t1, dot(c, LUMA));
float w = 1.0 - (dist * dist) / (radius2 * 1.5);
w = max(w, 0.0);
w *= w;
glow += c * mask * w;
totalWeight += w;
dir = vec2(
dir.x * ca - dir.y * sa,
dir.x * sa + dir.y * ca
);
}
glow *= intensity / max(totalWeight, 0.001);
if (u_int1 > 0) {
glow *= hexToRgb(u_int1);
}
vec3 result = blend(original.rgb, glow, u_int0);
result += (noise - 0.5) * (1.0 / 255.0);
fragColor = vec4(clamp(result, 0.0, 1.0), original.a);
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform int u_int0; // Mode: 0=Master, 1=Reds, 2=Yellows, 3=Greens, 4=Cyans, 5=Blues, 6=Magentas, 7=Colorize
uniform int u_int1; // Color Space: 0=HSL, 1=HSB/HSV
uniform float u_float0; // Hue (-180 to 180)
uniform float u_float1; // Saturation (-100 to 100)
uniform float u_float2; // Lightness/Brightness (-100 to 100)
uniform float u_float3; // Overlap (0 to 100) - feathering between adjacent color ranges
in vec2 v_texCoord;
out vec4 fragColor;
// Color range modes
const int MODE_MASTER = 0;
const int MODE_RED = 1;
const int MODE_YELLOW = 2;
const int MODE_GREEN = 3;
const int MODE_CYAN = 4;
const int MODE_BLUE = 5;
const int MODE_MAGENTA = 6;
const int MODE_COLORIZE = 7;
// Color space modes
const int COLORSPACE_HSL = 0;
const int COLORSPACE_HSB = 1;
const float EPSILON = 0.0001;
//=============================================================================
// RGB <-> HSL Conversions
//=============================================================================
vec3 rgb2hsl(vec3 c) {
float maxC = max(max(c.r, c.g), c.b);
float minC = min(min(c.r, c.g), c.b);
float delta = maxC - minC;
float h = 0.0;
float s = 0.0;
float l = (maxC + minC) * 0.5;
if (delta > EPSILON) {
s = l < 0.5
? delta / (maxC + minC)
: delta / (2.0 - maxC - minC);
if (maxC == c.r) {
h = (c.g - c.b) / delta + (c.g < c.b ? 6.0 : 0.0);
} else if (maxC == c.g) {
h = (c.b - c.r) / delta + 2.0;
} else {
h = (c.r - c.g) / delta + 4.0;
}
h /= 6.0;
}
return vec3(h, s, l);
}
float hue2rgb(float p, float q, float t) {
t = fract(t);
if (t < 1.0/6.0) return p + (q - p) * 6.0 * t;
if (t < 0.5) return q;
if (t < 2.0/3.0) return p + (q - p) * (2.0/3.0 - t) * 6.0;
return p;
}
vec3 hsl2rgb(vec3 hsl) {
if (hsl.y < EPSILON) return vec3(hsl.z);
float q = hsl.z < 0.5
? hsl.z * (1.0 + hsl.y)
: hsl.z + hsl.y - hsl.z * hsl.y;
float p = 2.0 * hsl.z - q;
return vec3(
hue2rgb(p, q, hsl.x + 1.0/3.0),
hue2rgb(p, q, hsl.x),
hue2rgb(p, q, hsl.x - 1.0/3.0)
);
}
vec3 rgb2hsb(vec3 c) {
float maxC = max(max(c.r, c.g), c.b);
float minC = min(min(c.r, c.g), c.b);
float delta = maxC - minC;
float h = 0.0;
float s = (maxC > EPSILON) ? delta / maxC : 0.0;
float b = maxC;
if (delta > EPSILON) {
if (maxC == c.r) {
h = (c.g - c.b) / delta + (c.g < c.b ? 6.0 : 0.0);
} else if (maxC == c.g) {
h = (c.b - c.r) / delta + 2.0;
} else {
h = (c.r - c.g) / delta + 4.0;
}
h /= 6.0;
}
return vec3(h, s, b);
}
vec3 hsb2rgb(vec3 hsb) {
vec3 rgb = clamp(abs(mod(hsb.x * 6.0 + vec3(0.0, 4.0, 2.0), 6.0) - 3.0) - 1.0, 0.0, 1.0);
return hsb.z * mix(vec3(1.0), rgb, hsb.y);
}
//=============================================================================
// Color Range Weight Calculation
//=============================================================================
float hueDistance(float a, float b) {
float d = abs(a - b);
return min(d, 1.0 - d);
}
float getHueWeight(float hue, float center, float overlap) {
float baseWidth = 1.0 / 6.0;
float feather = baseWidth * overlap;
float d = hueDistance(hue, center);
float inner = baseWidth * 0.5;
float outer = inner + feather;
return 1.0 - smoothstep(inner, outer, d);
}
float getModeWeight(float hue, int mode, float overlap) {
if (mode == MODE_MASTER || mode == MODE_COLORIZE) return 1.0;
if (mode == MODE_RED) {
return max(
getHueWeight(hue, 0.0, overlap),
getHueWeight(hue, 1.0, overlap)
);
}
float center = float(mode - 1) / 6.0;
return getHueWeight(hue, center, overlap);
}
//=============================================================================
// Adjustment Functions
//=============================================================================
float adjustLightness(float l, float amount) {
return amount > 0.0
? l + (1.0 - l) * amount
: l + l * amount;
}
float adjustBrightness(float b, float amount) {
return clamp(b + amount, 0.0, 1.0);
}
float adjustSaturation(float s, float amount) {
return amount > 0.0
? s + (1.0 - s) * amount
: s + s * amount;
}
vec3 colorize(vec3 rgb, float hue, float sat, float light) {
float lum = dot(rgb, vec3(0.299, 0.587, 0.114));
float l = adjustLightness(lum, light);
vec3 hsl = vec3(fract(hue), clamp(sat, 0.0, 1.0), clamp(l, 0.0, 1.0));
return hsl2rgb(hsl);
}
//=============================================================================
// Main
//=============================================================================
void main() {
vec4 original = texture(u_image0, v_texCoord);
float hueShift = u_float0 / 360.0; // -180..180 -> -0.5..0.5
float satAmount = u_float1 / 100.0; // -100..100 -> -1..1
float lightAmount= u_float2 / 100.0; // -100..100 -> -1..1
float overlap = u_float3 / 100.0; // 0..100 -> 0..1
vec3 result;
if (u_int0 == MODE_COLORIZE) {
result = colorize(original.rgb, hueShift, satAmount, lightAmount);
fragColor = vec4(result, original.a);
return;
}
vec3 hsx = (u_int1 == COLORSPACE_HSL)
? rgb2hsl(original.rgb)
: rgb2hsb(original.rgb);
float weight = getModeWeight(hsx.x, u_int0, overlap);
if (u_int0 != MODE_MASTER && hsx.y < EPSILON) {
weight = 0.0;
}
if (weight > EPSILON) {
float h = fract(hsx.x + hueShift * weight);
float s = clamp(adjustSaturation(hsx.y, satAmount * weight), 0.0, 1.0);
float v = (u_int1 == COLORSPACE_HSL)
? clamp(adjustLightness(hsx.z, lightAmount * weight), 0.0, 1.0)
: clamp(adjustBrightness(hsx.z, lightAmount * weight), 0.0, 1.0);
vec3 adjusted = vec3(h, s, v);
result = (u_int1 == COLORSPACE_HSL)
? hsl2rgb(adjusted)
: hsb2rgb(adjusted);
} else {
result = original.rgb;
}
fragColor = vec4(result, original.a);
}
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#version 300 es
#pragma passes 2
precision highp float;
// Blur type constants
const int BLUR_GAUSSIAN = 0;
const int BLUR_BOX = 1;
const int BLUR_RADIAL = 2;
// Radial blur config
const int RADIAL_SAMPLES = 12;
const float RADIAL_STRENGTH = 0.0003;
uniform sampler2D u_image0;
uniform vec2 u_resolution;
uniform int u_int0; // Blur type (BLUR_GAUSSIAN, BLUR_BOX, BLUR_RADIAL)
uniform float u_float0; // Blur radius/amount
uniform int u_pass; // Pass index (0 = horizontal, 1 = vertical)
in vec2 v_texCoord;
layout(location = 0) out vec4 fragColor0;
float gaussian(float x, float sigma) {
return exp(-(x * x) / (2.0 * sigma * sigma));
}
void main() {
vec2 texelSize = 1.0 / u_resolution;
float radius = max(u_float0, 0.0);
// Radial (angular) blur - single pass, doesn't use separable
if (u_int0 == BLUR_RADIAL) {
// Only execute on first pass
if (u_pass > 0) {
fragColor0 = texture(u_image0, v_texCoord);
return;
}
vec2 center = vec2(0.5);
vec2 dir = v_texCoord - center;
float dist = length(dir);
if (dist < 1e-4) {
fragColor0 = texture(u_image0, v_texCoord);
return;
}
vec4 sum = vec4(0.0);
float totalWeight = 0.0;
float angleStep = radius * RADIAL_STRENGTH;
dir /= dist;
float cosStep = cos(angleStep);
float sinStep = sin(angleStep);
float negAngle = -float(RADIAL_SAMPLES) * angleStep;
vec2 rotDir = vec2(
dir.x * cos(negAngle) - dir.y * sin(negAngle),
dir.x * sin(negAngle) + dir.y * cos(negAngle)
);
for (int i = -RADIAL_SAMPLES; i <= RADIAL_SAMPLES; i++) {
vec2 uv = center + rotDir * dist;
float w = 1.0 - abs(float(i)) / float(RADIAL_SAMPLES);
sum += texture(u_image0, uv) * w;
totalWeight += w;
rotDir = vec2(
rotDir.x * cosStep - rotDir.y * sinStep,
rotDir.x * sinStep + rotDir.y * cosStep
);
}
fragColor0 = sum / max(totalWeight, 0.001);
return;
}
// Separable Gaussian / Box blur
int samples = int(ceil(radius));
if (samples == 0) {
fragColor0 = texture(u_image0, v_texCoord);
return;
}
// Direction: pass 0 = horizontal, pass 1 = vertical
vec2 dir = (u_pass == 0) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
vec4 color = vec4(0.0);
float totalWeight = 0.0;
float sigma = radius / 2.0;
for (int i = -samples; i <= samples; i++) {
vec2 offset = dir * float(i) * texelSize;
vec4 sample_color = texture(u_image0, v_texCoord + offset);
float weight;
if (u_int0 == BLUR_GAUSSIAN) {
weight = gaussian(float(i), sigma);
} else {
// BLUR_BOX
weight = 1.0;
}
color += sample_color * weight;
totalWeight += weight;
}
fragColor0 = color / totalWeight;
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
in vec2 v_texCoord;
layout(location = 0) out vec4 fragColor0;
layout(location = 1) out vec4 fragColor1;
layout(location = 2) out vec4 fragColor2;
layout(location = 3) out vec4 fragColor3;
void main() {
vec4 color = texture(u_image0, v_texCoord);
// Output each channel as grayscale to separate render targets
fragColor0 = vec4(vec3(color.r), 1.0); // Red channel
fragColor1 = vec4(vec3(color.g), 1.0); // Green channel
fragColor2 = vec4(vec3(color.b), 1.0); // Blue channel
fragColor3 = vec4(vec3(color.a), 1.0); // Alpha channel
}
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#version 300 es
precision highp float;
// Levels Adjustment
// u_int0: channel (0=RGB, 1=R, 2=G, 3=B) default: 0
// u_float0: input black (0-255) default: 0
// u_float1: input white (0-255) default: 255
// u_float2: gamma (0.01-9.99) default: 1.0
// u_float3: output black (0-255) default: 0
// u_float4: output white (0-255) default: 255
uniform sampler2D u_image0;
uniform int u_int0;
uniform float u_float0;
uniform float u_float1;
uniform float u_float2;
uniform float u_float3;
uniform float u_float4;
in vec2 v_texCoord;
out vec4 fragColor;
vec3 applyLevels(vec3 color, float inBlack, float inWhite, float gamma, float outBlack, float outWhite) {
float inRange = max(inWhite - inBlack, 0.0001);
vec3 result = clamp((color - inBlack) / inRange, 0.0, 1.0);
result = pow(result, vec3(1.0 / gamma));
result = mix(vec3(outBlack), vec3(outWhite), result);
return result;
}
float applySingleChannel(float value, float inBlack, float inWhite, float gamma, float outBlack, float outWhite) {
float inRange = max(inWhite - inBlack, 0.0001);
float result = clamp((value - inBlack) / inRange, 0.0, 1.0);
result = pow(result, 1.0 / gamma);
result = mix(outBlack, outWhite, result);
return result;
}
void main() {
vec4 texColor = texture(u_image0, v_texCoord);
vec3 color = texColor.rgb;
float inBlack = u_float0 / 255.0;
float inWhite = u_float1 / 255.0;
float gamma = u_float2;
float outBlack = u_float3 / 255.0;
float outWhite = u_float4 / 255.0;
vec3 result;
if (u_int0 == 0) {
result = applyLevels(color, inBlack, inWhite, gamma, outBlack, outWhite);
}
else if (u_int0 == 1) {
result = color;
result.r = applySingleChannel(color.r, inBlack, inWhite, gamma, outBlack, outWhite);
}
else if (u_int0 == 2) {
result = color;
result.g = applySingleChannel(color.g, inBlack, inWhite, gamma, outBlack, outWhite);
}
else if (u_int0 == 3) {
result = color;
result.b = applySingleChannel(color.b, inBlack, inWhite, gamma, outBlack, outWhite);
}
else {
result = color;
}
fragColor = vec4(result, texColor.a);
}
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# GLSL Shader Sources
This folder contains the GLSL fragment shaders extracted from blueprint JSON files for easier editing and version control.
## File Naming Convention
`{Blueprint_Name}_{node_id}.frag`
- **Blueprint_Name**: The JSON filename with spaces/special chars replaced by underscores
- **node_id**: The GLSLShader node ID within the subgraph
## Usage
```bash
# Extract shaders from blueprint JSONs to this folder
python update_blueprints.py extract
# Patch edited shaders back into blueprint JSONs
python update_blueprints.py patch
```
## Workflow
1. Run `extract` to pull current shaders from JSONs
2. Edit `.frag` files
3. Run `patch` to update the blueprint JSONs
4. Test
5. Commit both `.frag` files and updated JSONs
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform vec2 u_resolution;
uniform float u_float0; // strength [0.0 2.0] typical: 0.31.0
in vec2 v_texCoord;
layout(location = 0) out vec4 fragColor0;
void main() {
vec2 texel = 1.0 / u_resolution;
// Sample center and neighbors
vec4 center = texture(u_image0, v_texCoord);
vec4 top = texture(u_image0, v_texCoord + vec2( 0.0, -texel.y));
vec4 bottom = texture(u_image0, v_texCoord + vec2( 0.0, texel.y));
vec4 left = texture(u_image0, v_texCoord + vec2(-texel.x, 0.0));
vec4 right = texture(u_image0, v_texCoord + vec2( texel.x, 0.0));
// Edge enhancement (Laplacian)
vec4 edges = center * 4.0 - top - bottom - left - right;
// Add edges back scaled by strength
vec4 sharpened = center + edges * u_float0;
fragColor0 = vec4(clamp(sharpened.rgb, 0.0, 1.0), center.a);
}
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#version 300 es
precision highp float;
uniform sampler2D u_image0;
uniform vec2 u_resolution;
uniform float u_float0; // amount [0.0 - 3.0] typical: 0.5-1.5
uniform float u_float1; // radius [0.5 - 10.0] blur radius in pixels
uniform float u_float2; // threshold [0.0 - 0.1] min difference to sharpen
in vec2 v_texCoord;
layout(location = 0) out vec4 fragColor0;
float gaussian(float x, float sigma) {
return exp(-(x * x) / (2.0 * sigma * sigma));
}
float getLuminance(vec3 color) {
return dot(color, vec3(0.2126, 0.7152, 0.0722));
}
void main() {
vec2 texel = 1.0 / u_resolution;
float radius = max(u_float1, 0.5);
float amount = u_float0;
float threshold = u_float2;
vec4 original = texture(u_image0, v_texCoord);
// Gaussian blur for the "unsharp" mask
int samples = int(ceil(radius));
float sigma = radius / 2.0;
vec4 blurred = vec4(0.0);
float totalWeight = 0.0;
for (int x = -samples; x <= samples; x++) {
for (int y = -samples; y <= samples; y++) {
vec2 offset = vec2(float(x), float(y)) * texel;
vec4 sample_color = texture(u_image0, v_texCoord + offset);
float dist = length(vec2(float(x), float(y)));
float weight = gaussian(dist, sigma);
blurred += sample_color * weight;
totalWeight += weight;
}
}
blurred /= totalWeight;
// Unsharp mask = original - blurred
vec3 mask = original.rgb - blurred.rgb;
// Luminance-based threshold with smooth falloff
float lumaDelta = abs(getLuminance(original.rgb) - getLuminance(blurred.rgb));
float thresholdScale = smoothstep(0.0, threshold, lumaDelta);
mask *= thresholdScale;
// Sharpen: original + mask * amount
vec3 sharpened = original.rgb + mask * amount;
fragColor0 = vec4(clamp(sharpened, 0.0, 1.0), original.a);
}
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#!/usr/bin/env python3
"""
Shader Blueprint Updater
Syncs GLSL shader files between this folder and blueprint JSON files.
File naming convention:
{Blueprint Name}_{node_id}.frag
Usage:
python update_blueprints.py extract # Extract shaders from JSONs to here
python update_blueprints.py patch # Patch shaders back into JSONs
python update_blueprints.py # Same as patch (default)
"""
import json
import logging
import sys
import re
from pathlib import Path
logging.basicConfig(level=logging.INFO, format='%(message)s')
logger = logging.getLogger(__name__)
GLSL_DIR = Path(__file__).parent
BLUEPRINTS_DIR = GLSL_DIR.parent
def get_blueprint_files():
"""Get all blueprint JSON files."""
return sorted(BLUEPRINTS_DIR.glob("*.json"))
def sanitize_filename(name):
"""Convert blueprint name to safe filename."""
return re.sub(r'[^\w\-]', '_', name)
def extract_shaders():
"""Extract all shaders from blueprint JSONs to this folder."""
extracted = 0
for json_path in get_blueprint_files():
blueprint_name = json_path.stem
try:
with open(json_path, 'r') as f:
data = json.load(f)
except (json.JSONDecodeError, IOError) as e:
logger.warning("Skipping %s: %s", json_path.name, e)
continue
# Find GLSLShader nodes in subgraphs
for subgraph in data.get('definitions', {}).get('subgraphs', []):
for node in subgraph.get('nodes', []):
if node.get('type') == 'GLSLShader':
node_id = node.get('id')
widgets = node.get('widgets_values', [])
# Find shader code (first string that looks like GLSL)
for widget in widgets:
if isinstance(widget, str) and widget.startswith('#version'):
safe_name = sanitize_filename(blueprint_name)
frag_name = f"{safe_name}_{node_id}.frag"
frag_path = GLSL_DIR / frag_name
with open(frag_path, 'w') as f:
f.write(widget)
logger.info(" Extracted: %s", frag_name)
extracted += 1
break
logger.info("\nExtracted %d shader(s)", extracted)
def patch_shaders():
"""Patch shaders from this folder back into blueprint JSONs."""
# Build lookup: blueprint_name -> [(node_id, shader_code), ...]
shader_updates = {}
for frag_path in sorted(GLSL_DIR.glob("*.frag")):
# Parse filename: {blueprint_name}_{node_id}.frag
parts = frag_path.stem.rsplit('_', 1)
if len(parts) != 2:
logger.warning("Skipping %s: invalid filename format", frag_path.name)
continue
blueprint_name, node_id_str = parts
try:
node_id = int(node_id_str)
except ValueError:
logger.warning("Skipping %s: invalid node_id", frag_path.name)
continue
with open(frag_path, 'r') as f:
shader_code = f.read()
if blueprint_name not in shader_updates:
shader_updates[blueprint_name] = []
shader_updates[blueprint_name].append((node_id, shader_code))
# Apply updates to JSON files
patched = 0
for json_path in get_blueprint_files():
blueprint_name = sanitize_filename(json_path.stem)
if blueprint_name not in shader_updates:
continue
try:
with open(json_path, 'r') as f:
data = json.load(f)
except (json.JSONDecodeError, IOError) as e:
logger.error("Error reading %s: %s", json_path.name, e)
continue
modified = False
for node_id, shader_code in shader_updates[blueprint_name]:
# Find the node and update
for subgraph in data.get('definitions', {}).get('subgraphs', []):
for node in subgraph.get('nodes', []):
if node.get('id') == node_id and node.get('type') == 'GLSLShader':
widgets = node.get('widgets_values', [])
if len(widgets) > 0 and widgets[0] != shader_code:
widgets[0] = shader_code
modified = True
logger.info(" Patched: %s (node %d)", json_path.name, node_id)
patched += 1
if modified:
with open(json_path, 'w') as f:
json.dump(data, f)
if patched == 0:
logger.info("No changes to apply.")
else:
logger.info("\nPatched %d shader(s)", patched)
def main():
if len(sys.argv) < 2:
command = "patch"
else:
command = sys.argv[1].lower()
if command == "extract":
logger.info("Extracting shaders from blueprints...")
extract_shaders()
elif command in ("patch", "update", "apply"):
logger.info("Patching shaders into blueprints...")
patch_shaders()
else:
logger.info(__doc__)
sys.exit(1)
if __name__ == "__main__":
main()