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Fix top flamegraph bars disappearing at large viewport sizes #47

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Merged
Qard merged 1 commit into from
Dec 24, 2025
Merged

Fix top flamegraph bars disappearing at large viewport sizes #47

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19 changes: 16 additions & 3 deletions src/renderer/WebGLManager.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -165,12 +165,25 @@ export class WebGLManager {
if (!this.#gl) {return}

const dpr = window.devicePixelRatio || 1
this.#canvas.width = width * dpr
this.#canvas.height = height * dpr
let bufferWidth = Math.round(width * dpr)
let bufferHeight = Math.round(height * dpr)

// Cap buffer size to avoid GPU/driver issues with very large framebuffers
// Some systems have rendering issues when buffer dimensions exceed 4096px
const MAX_BUFFER_DIM = 4096
const maxDim = Math.max(bufferWidth, bufferHeight)
if (maxDim > MAX_BUFFER_DIM) {
const scale = MAX_BUFFER_DIM / maxDim
bufferWidth = Math.round(bufferWidth * scale)
bufferHeight = Math.round(bufferHeight * scale)
}

this.#canvas.width = bufferWidth
this.#canvas.height = bufferHeight
this.#canvas.style.width = `${width}px`
this.#canvas.style.height = `${height}px`

this.#gl.viewport(0, 0, this.#canvas.width, this.#canvas.height)
this.#gl.viewport(0, 0, bufferWidth, bufferHeight)
}

/**
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