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Tweak shader settings for ghostty, make it less annoying.

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This commit is contained in:
Martin Larsson 2025-07-15 12:32:47 +02:00
parent 0d5ac652ab
commit cca5c9f677
3 changed files with 21 additions and 18 deletions
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4
ghostty/shaders/bettercrt.glsl
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@ -8,8 +8,8 @@
// - Removed tint
// - Made the boundaries match ghostty's background color
float warp = 0.115; // simulate curvature of CRT monitor
float scan = 0.2; // simulate darkness between scanlines
float warp = 0.07; // simulate curvature of CRT monitor
float scan = 0.125; // simulate darkness between scanlines
void mainImage(out vec4 fragColor, in vec2 fragCoord)
{

2
ghostty/shaders/bloom.glsl
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@ -44,7 +44,7 @@ void mainImage(out vec4 fragColor, in vec2 fragCoord) {
vec4 c = texture(iChannel0, uv + s.xy * step);
float l = lum(c);
if (l > 0.2) {
color += l * s.z * c * 0.0075;
color += l * s.z * c * 0.0035;
}
}

33
ghostty/shaders/cursor_smear.glsl
View file

@ -64,9 +64,10 @@ vec4 saturate(vec4 color, float factor) {
}
vec4 TRAIL_COLOR = iCurrentCursorColor;
const float OPACITY = 0.6;
const float OPACITY = 0.325;
const float DURATION = 0.2; //IN SECONDS
const float MAX_TRAIL_LENGTH = 0.6;
const float TRAIL_HEIGHT_FACTOR = 0.4;
void mainImage(out vec4 fragColor, in vec2 fragCoord)
{
@ -110,9 +111,13 @@ void mainImage(out vec4 fragColor, in vec2 fragCoord)
trailStartPoint = prevCursorCenter;
}
// Set vertices for the current cursor (full width)
vec2 v0 = vec2(currentCursor.x + currentCursor.z * vertexFactor, currentCursor.y - currentCursor.w);
vec2 v1 = vec2(currentCursor.x + currentCursor.z * invertedVertexFactor, currentCursor.y);
// Calculate cursor center for thinner trail
vec2 cursorCenter = currentCursor.xy - (currentCursor.zw * offsetFactor);
float reducedHeight = currentCursor.w * TRAIL_HEIGHT_FACTOR;
// Set vertices for a thinner trail (reduced height)
vec2 v0 = vec2(currentCursor.x + currentCursor.z * vertexFactor, cursorCenter.y - reducedHeight * 0.5);
vec2 v1 = vec2(currentCursor.x + currentCursor.z * invertedVertexFactor, cursorCenter.y + reducedHeight * 0.5);
// This creates the triangular shape with the point at the trail cutoff
vec2 v2 = trailStartPoint;
@ -123,22 +128,20 @@ void mainImage(out vec4 fragColor, in vec2 fragCoord)
float progress = clamp((iTime - iTimeCursorChange) / DURATION, 0.0, 1.0);
float easedProgress = ease(progress);
// We already calculated these values earlier
// Distance between cursors determine the total length of the parallelogram;
// vec2 centerCC = getRectangleCenter(currentCursor);
// vec2 centerCP = getRectangleCenter(previousCursor);
// float lineLength = distance(centerCC, centerCP);
// float cappedlinelength = min(lineLength, MAX_TRAIL_LENGTH);
vec4 newColor = vec4(fragColor);
vec4 trail = TRAIL_COLOR;
trail = saturate(trail, 2.5);
// Draw trail
newColor = mix(newColor, trail, antialising(sdfTrail));
trail.a *= OPACITY; // Apply transparency to the trail
// Draw trail with transparency
float trailMask = antialising(sdfTrail);
newColor = mix(newColor, trail, trailMask * OPACITY);
// Draw current cursor
newColor = mix(newColor, trail, antialising(sdfCurrentCursor));
newColor = mix(newColor, fragColor, step(sdfCurrentCursor, 0.));
// Apply the trail effect
fragColor = mix(fragColor, newColor, step(sdfCurrentCursor, easedProgress * cappedlinelength));
// Apply the trail effect with transparency
fragColor = mix(fragColor, newColor, step(sdfCurrentCursor, easedProgress * cappedlinelength) * OPACITY);
}