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bias lighting on smaller video dimension

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minjaesong
2025-09-05 20:01:59 +09:00
parent ee03809899
commit 2a54384d52
2 changed files with 24 additions and 14 deletions
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29
assets/disk0/tvdos/bin/playtev.js
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@@ -497,13 +497,30 @@ function getRGBfromScr(x, y) {
function setBiasLighting() {
let samples = []
for (let x = 8; x < 560; x+=32) {
samples.push(getRGBfromScr(x, 3))
samples.push(getRGBfromScr(x, 445))
// Get native resolution for centering calculation
let nativeWidth = graphics.getPixelDimension()[0]
let nativeHeight = graphics.getPixelDimension()[1]
// Calculate video position offset (centered)
let offsetX = Math.floor((nativeWidth - width) / 2)
let offsetY = Math.floor((nativeHeight - height) / 2)
// Sample from video borders, scaled to actual video dimensions
let sampleStepX = Math.max(8, Math.floor(width / 18)) // ~18 samples across width
let sampleStepY = Math.max(8, Math.floor(height / 17)) // ~17 samples across height
let borderMargin = Math.min(8, Math.floor(width / 70)) // Proportional border margin
// Sample top and bottom borders
for (let x = borderMargin; x < width - borderMargin; x += sampleStepX) {
samples.push(getRGBfromScr(x + offsetX, borderMargin + offsetY))
samples.push(getRGBfromScr(x + offsetX, height - borderMargin - 1 + offsetY))
}
for (let y = 29; y < 448; y+=26) {
samples.push(getRGBfromScr(8, y))
samples.push(getRGBfromScr(552, y))
// Sample left and right borders
for (let y = borderMargin; y < height - borderMargin; y += sampleStepY) {
samples.push(getRGBfromScr(borderMargin + offsetX, y + offsetY))
samples.push(getRGBfromScr(width - borderMargin - 1 + offsetX, y + offsetY))
}
let out = [0.0, 0.0, 0.0]