70 lines
1.8 KiB
Java
70 lines
1.8 KiB
Java
package org.thoughtcrime.securesms.imageeditor;
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import android.graphics.Matrix;
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import android.graphics.PointF;
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import androidx.annotation.NonNull;
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import org.thoughtcrime.securesms.imageeditor.model.EditorElement;
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abstract class ElementEditSession implements EditSession {
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private final Matrix inverseMatrix;
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final EditorElement selected;
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final PointF[] startPointElement = newTwoPointArray();
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final PointF[] endPointElement = newTwoPointArray();
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final PointF[] startPointScreen = newTwoPointArray();
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final PointF[] endPointScreen = newTwoPointArray();
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ElementEditSession(@NonNull EditorElement selected, @NonNull Matrix inverseMatrix) {
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this.selected = selected;
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this.inverseMatrix = inverseMatrix;
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}
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void setScreenStartPoint(int p, @NonNull PointF point) {
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startPointScreen[p] = point;
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mapPoint(startPointElement[p], inverseMatrix, point);
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}
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void setScreenEndPoint(int p, @NonNull PointF point) {
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endPointScreen[p] = point;
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mapPoint(endPointElement[p], inverseMatrix, point);
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}
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@Override
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public abstract void movePoint(int p, @NonNull PointF point);
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@Override
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public void commit() {
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selected.commitEditorMatrix();
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}
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@Override
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public EditorElement getSelected() {
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return selected;
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}
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private static PointF[] newTwoPointArray() {
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PointF[] array = new PointF[2];
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for (int i = 0; i < array.length; i++) {
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array[i] = new PointF();
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}
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return array;
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}
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/**
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* Map src to dst using the matrix.
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*
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* @param dst Output point.
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* @param matrix Matrix to transform point with.
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* @param src Input point.
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*/
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private static void mapPoint(@NonNull PointF dst, @NonNull Matrix matrix, @NonNull PointF src) {
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float[] in = { src.x, src.y };
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float[] out = new float[2];
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matrix.mapPoints(out, in);
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dst.set(out[0], out[1]);
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}
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}
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