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Refactor scaling code

This commit is contained in:
Elias Batek 2025-02-01 22:52:02 +01:00
parent c3beff155c
commit 2005248514
1 changed files with 17 additions and 12 deletions
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29
pixmappaint.d
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@ -3132,6 +3132,10 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
sourceMax[idxY],
);
static if (directionY == down) {
const nLines = 1 + posSrcY[idxB] - posSrcY[idxT];
}
static if (directionY == up) {
const ulong[2] weightsY = () {
ulong[2] result;
@ -3156,6 +3160,10 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
sourceMax[idxX],
);
static if (directionX == down) {
const nSamples = 1 + posSrcX[idxR] - posSrcX[idxL];
}
const Point[4] posNeighs = [
Point(posSrcX[idxL], posSrcY[idxT]),
Point(posSrcX[idxR], posSrcY[idxT]),
@ -3200,10 +3208,11 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
pragma(inline, true);
static if (mode == SamplingMode.multi) {
const nLines = 1 + posSrcY[idxB] - posSrcY[idxT];
alias ForeachLineCallback =
InterPixel delegate(const Point posLine) @safe pure nothrow @nogc;
alias ForeachLineCallback = InterPixel delegate(const Point posLine) @safe pure nothrow @nogc;
InterPixel foreachLine(scope ForeachLineCallback apply) {
pragma(inline, true);
InterPixel linesSum = 0;
foreach (lineY; posSrcY[idxT] .. (1 + posSrcY[idxB])) {
const posLine = Point(posSrcX[idxL], lineY);
@ -3243,7 +3252,6 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
// ========== Down ==========
static if (directionX == down) {
static if (mode == SamplingMode.single) {
const nSamples = 1 + posSrcX[idxR] - posSrcX[idxL];
const posSampling = Point(posSrcX[idxL], posSrcY[idxT]);
const samplingOffset = source.scanTo(posSampling);
const srcSamples = () @trusted {
@ -3263,21 +3271,20 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
}
static if (mode == SamplingMode.dual) {
const nSamples = 1 + posSrcX[idxR] - posSrcX[idxL];
const Point[2] posSampling = [
Point(posSrcX[idxL], posSrcY[idxT]),
Point(posSrcX[idxL], posSrcY[idxB]),
posNeighs[idxTL],
posNeighs[idxBL],
];
const int[2] samplingOffsets = [
source.scanTo(posSampling[0]),
source.scanTo(posSampling[1]),
source.scanTo(posSampling[idxT]),
source.scanTo(posSampling[idxB]),
];
const srcSamples2 = () @trusted {
const(const(Pixel)[])[2] result = [
source.data.ptr[samplingOffsets[0] .. (samplingOffsets[0] + nSamples)],
source.data.ptr[samplingOffsets[1] .. (samplingOffsets[1] + nSamples)],
source.data.ptr[samplingOffsets[idxT] .. (samplingOffsets[idxT] + nSamples)],
source.data.ptr[samplingOffsets[idxB] .. (samplingOffsets[idxB] + nSamples)],
];
return result;
}();
@ -3299,8 +3306,6 @@ private void scaleToImpl(ScalingFilter filter)(const Pixmap source, Pixmap targe
}
static if (mode == SamplingMode.multi) {
const nSamples = 1 + posSrcX[idxR] - posSrcX[idxL];
auto ySum = foreachLine(delegate(const Point posLine) {
const samplingOffset = source.scanTo(posLine);
const srcSamples = () @trusted {