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Refactor component/channel loop of image scaler

This commit is contained in:
Elias Batek 2025-02-01 05:59:56 +01:00
parent 539480a2fa
commit 2804f426c4
1 changed files with 187 additions and 184 deletions
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17
pixmappaint.d
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@ -3092,7 +3092,7 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
];
}
return result;
};
}
auto dst = PixmapScannerRW(target);
@ -3170,10 +3170,8 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
multi,
}
foreach (immutable ib, ref c; pxInt.components) {
// ======== Interpolate X ========
auto sampleX(SamplingMode mode)() {
auto sampleX(SamplingMode mode)(const size_t ib) {
pragma(inline, true);
static if (mode == SamplingMode.multi) {
@ -3380,13 +3378,18 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
// ======== Interpolate Y ========
static if (directionY == none) {
c = clamp255(sampleX!(SamplingMode.single)());
foreach (immutable ib, ref c; pxInt.components) {
c = clamp255(sampleX!(SamplingMode.single)(ib));
}
}
static if (directionY == down) {
c = clamp255(sampleX!(SamplingMode.multi)());
foreach (immutable ib, ref c; pxInt.components) {
c = clamp255(sampleX!(SamplingMode.multi)(ib));
}
}
static if (directionY == up) {
const xSums = sampleX!(SamplingMode.dual)();
foreach (immutable ib, ref c; pxInt.components) {
const xSums = sampleX!(SamplingMode.dual)(ib);
ulong ySum = 0;
ySum += (xSums[idxT] * weightsY[idxT]);