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Corrected the MSDF logic in the GLSL and WGSL shaders, which fixed the rendering in Chrome's software renderer.

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Rezmason
2022-10-02 20:35:12 -07:00
parent 95b67d1dad
commit 51faabfbe6
5 changed files with 67 additions and 15 deletions
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40
shaders/glsl/rainPass.frag.glsl
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@@ -7,6 +7,8 @@ precision lowp float;
uniform sampler2D raindropState, symbolState, effectState;
uniform float numColumns, numRows;
uniform sampler2D glyphMSDF, glintMSDF, baseTexture, glintTexture;
uniform float msdfPxRange;
uniform vec2 glyphMSDFSize, glintMSDFSize;
uniform bool hasBaseTexture, hasGlintTexture;
uniform float glyphHeightToWidth, glyphSequenceLength, glyphEdgeCrop;
uniform float baseContrast, baseBrightness, glintContrast, glintBrightness;
@@ -115,15 +117,23 @@ vec2 getSymbol(vec2 uv, float index) {
// MSDF: calculate brightness of fragment based on distance to shape
vec2 symbol;
{
vec3 dist = texture2D(glyphMSDF, uv).rgb;
float sigDist = median3(dist) - 0.5;
symbol.r = clamp(sigDist / fwidth(sigDist) + 0.5, 0., 1.);
vec2 unitRange = vec2(msdfPxRange) / glyphMSDFSize;
vec2 screenTexSize = vec2(1.0) / fwidth(uv);
float screenPxRange = max(0.5 * dot(unitRange, screenTexSize), 1.0);
float signedDistance = median3(texture2D(glyphMSDF, uv).rgb);
float screenPxDistance = screenPxRange * (signedDistance - 0.5);
symbol.r = clamp(screenPxDistance + 0.5, 0.0, 1.0);
}
if (isolateGlint) {
vec3 dist = texture2D(glintMSDF, uv).rgb;
float sigDist = median3(dist) - 0.5;
symbol.g = clamp(sigDist / fwidth(sigDist) + 0.5, 0., 1.);
vec2 unitRange = vec2(msdfPxRange) / glintMSDFSize;
vec2 screenTexSize = vec2(1.0) / fwidth(uv);
float screenPxRange = max(0.5 * dot(unitRange, screenTexSize), 1.0);
float signedDistance = median3(texture2D(glintMSDF, uv).rgb);
float screenPxDistance = screenPxRange * (signedDistance - 0.5);
symbol.g = clamp(screenPxDistance + 0.5, 0.0, 1.0);
}
return symbol;
@@ -157,6 +167,24 @@ void main() {
) * symbol.r,
1.
);
uv = fract(uv * vec2(numColumns, numRows));
uv -= 0.5;
uv *= clamp(1. - glyphEdgeCrop, 0., 1.);
if (length(uv) > 0.25) {
discard;
}
uv += 0.5;
float goal = fwidth(uv - 0.5).x;
float computed = 1.0;
float magnifier = 50.0;
if (uv.x <= 0.5) {
gl_FragColor = vec4(vec3(goal * magnifier), 1.0);
} else {
gl_FragColor = vec4(vec3(computed * magnifier), 1.0);
}
} else {
gl_FragColor = vec4(brightness.rg * symbol.r, brightness.b * symbol.g, 0.);
}

31
shaders/wgsl/rainPass.wgsl
View File

@@ -26,6 +26,7 @@ struct Config {
rippleType : i32,
// render-specific properties
msdfPxRange : f32,
forwardSpeed : f32,
baseBrightness : f32,
baseContrast : f32,
@@ -94,7 +95,7 @@ struct IntroCellData {
// Render-specific bindings
@group(0) @binding(2) var<uniform> scene : Scene;
@group(0) @binding(3) var linearSampler : sampler;
@group(0) @binding(4) var msdfTexture : texture_2d<f32>;
@group(0) @binding(4) var glyphMSDFTexture : texture_2d<f32>;
@group(0) @binding(5) var glintMSDFTexture : texture_2d<f32>;
@group(0) @binding(6) var baseTexture : texture_2d<f32>;
@group(0) @binding(7) var glintTexture : texture_2d<f32>;
@@ -502,15 +503,31 @@ fn getSymbol(cellUV : vec2<f32>, index : i32) -> vec2<f32> {
// MSDF: calculate brightness of fragment based on distance to shape
{
var dist = textureSample(msdfTexture, linearSampler, uv).rgb;
var sigDist = median3(dist) - 0.5;
symbol.r = clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
// var dist = textureSample(glyphMSDFTexture, linearSampler, uv).rgb;
// var sigDist = median3(dist) - 0.5;
// symbol.r = clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
var unitRange = vec2<f32>(config.msdfPxRange) / vec2<f32>(textureDimensions(glyphMSDFTexture));
var screenTexSize = vec2<f32>(1.0) / fwidth(uv);
var screenPxRange = max(0.5 * dot(unitRange, screenTexSize), 1.0);
var signedDistance = median3(textureSample(glyphMSDFTexture, linearSampler, uv).rgb);
var screenPxDistance = screenPxRange * (signedDistance - 0.5);
symbol.r = clamp(screenPxDistance + 0.5, 0.0, 1.0);
}
if (bool(config.isolateGlint)) {
var dist = textureSample(glintMSDFTexture, linearSampler, uv).rgb;
var sigDist = median3(dist) - 0.5;
symbol.g = clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
// var dist = textureSample(glintMSDFTexture, linearSampler, uv).rgb;
// var sigDist = median3(dist) - 0.5;
// symbol.g = clamp(sigDist / fwidth(sigDist) + 0.5, 0.0, 1.0);
var unitRange = vec2<f32>(config.msdfPxRange) / vec2<f32>(textureDimensions(glintMSDFTexture));
var screenTexSize = vec2<f32>(1.0) / fwidth(uv);
var screenPxRange = max(0.5 * dot(unitRange, screenTexSize), 1.0);
var signedDistance = median3(textureSample(glintMSDFTexture, linearSampler, uv).rgb);
var screenPxDistance = screenPxRange * (signedDistance - 0.5);
symbol.g = clamp(screenPxDistance + 0.5, 0.0, 1.0);
}
return symbol;